2024-03-28T13:25:46Z
https://ejournal.undip.ac.id/index.php/index/oai
oai:ojs.ejournal.undip.ac.id:article/57318
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
The Effect of Addition EM4 Solution on Vermicomposting Fish Waste to Increase CNPK Regosol Soil
Setiani, Vivin
Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=tkFGxfEAAAAJ&hl=en https://orcid.org/0000-0001-6398-3997
Dewi, Tanti Utami
Politeknik Perkapalan Negeri Surabaya https://scholar.google.com/citations?hl=id&user=g7fcsDcAAAAJ
Nindyapuspa, Ayu
Politeknik Perkapalan Negeri Surabaya https://scholar.google.com/citations?hl=en&authuser=5&user=Yo9acOwAAAAJ
Kristina, Dinda Maya
Politeknik Perkapalan Negeri Surabaya
Devi, Yesica Novrita
Politeknik Perkapalan Negeri Surabaya https://scholar.google.com/citations?hl=id&user=M92LugkAAAAJ
Array
The Environmental Service Surabaya noted that waste generation at Benowo Landfill reached 1,600 tons/day. 60% of waste generation at Benowo Landfill was dominated by organic waste. One of organic waste was fish waste, vegetable waste, and some waste from household business activities such as sawdust. One of method composting to reduce organic waste is vermicomposting. Lumbricus rubellus is a type of worm that eats leaf litter so, it is suitable to be used decompose organic waste. The adding of EM4 solution can make more fast of composting process. The compost could be applied in regosol soil to improve soil CNPK quality. The purpose of this study was to analyze the effect of EM4 variations on the quality of compost based on SNI 19-7030-2004 and the effect of adding the compost to regosol soil. The research result showed that the quality of compost complies with SNI 19-7030-2004. The statistical analysis showed that EM4 has a significantly effect on compost quality and regosol soil improvement.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/57318
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/57318/183617
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/29182
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Optimization of Waste Transportation System in Tembalang District, Semarang City
Pramesti, Ajeng Lakshita
Universitas Diponegoro
Sumiyati, Sri
Universitas Diponegoro
Ramadan, Bimastyaji Surya
Universitas Diponegoro
Samadikun, Budi Prasetyo
Universitas Diponegoro
Sudarno, Sudarno
Universitas Diponegoro
Array
Kecamatan Tembalang memiliki jumlah penduduk sebanyak 206.271 jiwa dengan timbulan sampah sebanyak 156,8 m3. Kecamatan Tembalang memiliki 18 TPS, 23 kontainer, dan 7 kendaraan pengangkut untuk menangani sampah dari TPS menuju TPA Jatibarang. Persentase pelayanan pengangkutan sampah di Kecamatan Tembalang hanya sebesar 27%. Beberapa TPS belum dapat menampung timbulan sampah dari penduduk Kecamatan Tembalang. Kondisi jalan, jenis jalan, dan kecepatan kendaraan dari rute pengangkutan sampah mempengaruhi waktu pengangkutan dan biaya operasional yang dikeluarkan. Tujuan dari perencanaan ini adalah merencanakan sistem pengangkutan sampah di Kecamatan Tembalang dengan mengoptimalkan waktu kerja dan biaya sesuai dengan target yang diinginkan oleh dinas terkait. Sisa waktu kerja rata-rata yang dimiliki kendaraan pengangkut sampah di Kecamatan Tembalang adalah 2,28 jam dengan jumlah ritasi 21 rit/hari. Rute pengangkutan dioptimasi menggunakan Network Analyst pada aplikasi berbasis GIS. Kondisi jalan mempengaruhi waktu pelayanan dan kecepatan kendaraan rata-rata optimal 37,607 km/jam yang menyebabkan jumlah ritasi bertambah menjadi 34 rit/hari, dengan 31 kontainer dan sisa waktu kerja rata-rata adalah 1 jam. Optimasi tersebut menyebabkan meningkatnya persentase pelayanan menjadi 42%. Peningkatan biaya operasional kendaraan (BOK) diketahui sebesar Rp 694.262.870,53/tahun dengan penurunan biaya retribusi sebesar Rp 1.983,59/KK/tahun dikarenakan pertambahan persentase pelayanan.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/29182
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/32075
2020-12-17T04:32:48Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Bioremediation of Tofu Industrial Wastewater Using Anaerobic-Aerobic Solution of EM4
Deffy, Trisca
Universitas Islam Negeri Sunan Ampel Surabaya
Nilandita, Widya
Universitas Islam Negeri Sunan Ampel Surabaya
Munfarida, Ida
Universitas Islam Negeri Sunan Ampel Surabaya
Array
Penelitian ini menggunakan proses pengolahan bioremediasi dengan sistem anaerob-aerob dengan mencampurkan limbah cair tahu dan larutan EM4 ke dalam reaktor. Variasi larutan EM4 yang akan digunakan dalam penelitian ini adalah konsentrasi 1/20 dengan konsentrasi dan waktu detensi 1/10. Penelitian ini dilakukan selama 8 hari. Hasil penelitian menunjukkan bahwa larutan EM4 mampu menurunkan BOD, COD, dan TSS dengan menggunakan variasi konsentrasi dan waktu detensi. Penurunan kadar BOD, COD, dan TSS yang paling signifikan terjadi pada hari ke-8. Kadar BOD untuk reaktor pertama pada konsentrasi 1/10 dengan efisiensi penyisihan 48,98% dan reaktor kedua dengan efisiensi penyisihan 48,98%. Untuk konsentrasi 1/20 efisiensi penyisihan adalah 37,33% dan pada reaktor kedua efisiensi penyisihan adalah 37,34%. Kadar COD reaktor pertama pada konsentrasi 1/10 dengan efisiensi penyisihan 61,82% dan reakotor kedua dengan efisiensi penyisihan 62,10%. Untuk konsentrasi 1/20 efisiensi penyisihan adalah 30,39% dan pada reaktor kedua efisiensi penyisihan adalah 34,98%. Kadar TSS reaktor pertama pada konsentrasi 1/20 dengan efisiensi penyisihan 41,17% dan pada reaktor kedua efisiensi penyisihan 43,59%. Pada konsentrasi 1/20 efisiensi penyisihan kadar TSS pada reaktor pertama 1,02% dan pada reaktor kedua efisiensi penyisihan 5,10%. Bioremediasi dengan menggunakan larutan EM4 dapat digunakan untuk menurunkan kadar BOD, COD, dan TSS limbah cair tahu yang sesuai dengan baku mutu yang berlaku.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/32075
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34248
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Wulandari, Marita
Institut Teknologi Kalimantan
Prasaningtyas, Asri
Ma'arij Harfadli, Muhammad
Handayani, Anggi Melinda
Coastal areas are often in the spotlight related to environmental problems, such as plastic waste. Coastal and coastal areas often face complex problems related to plastic waste, including microplastics. Microplastics (MPs) are tiny pieces of plastic that are as small as ≤ 5 mm and possibly pollute the environment. The study aimed to identify the presence and abundance of microplastics contaminating the coastal areas of Balikpapan City. Sediment samples were taken at a depth 0-10 cm. The observations were carried out in several stages; those stages are the drying stage, volume reduction, density separation, and counting using a microscope. The microplastic observation results with the microscope showed four types: fragment-shaped microplastics, phylum-shaped microplastics, fiber microplastics, and microbead-shaped microplastics. The highest number of microplastic particles was found at the Kampung Atas Air point, about 201 particles / 100 grams of dry sediment and the least number of microplastic particles were found at the Monpera point, about 16 particles / 100 grams of dry sediment. Microplastics with fiber form dominated all the study areas. Environmental conditions and pollutant sources influence the difference in the number of microplastics
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34248
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/54330
2023-08-18T09:24:32Z
presipitasi:RSA
"230730 2023 eng "
2550-0023
1907-817X
dc
Characterization of Anammox Bacteria from Marine Water and Sediment Samples
Utomo, Sudarno
Universitas Diponegoro
Wijanarka, Wijanarka
Universitas Diponegoro
Oktiawan, Wiharyanto
Universitas Diponegoro
Array
Anammox activity of water and sediment taken from marine ecosistem around Semarang were investigated in anammox media agar and batch reactor. Effect of increasing salinities (3% to 5%, 7% and 9%) and decreasing salinities (3% to 2%, 1% and 0%) were investigated. Water and sediment taken from marine ecosistem around Semarang city showed a positive result. Increasing salinity up to 9% will have a positive influence on the activity of anammox bacteria. Whereas, the decrease in salinity will negatively affect anammox bacteria. The ratio of ammonium:nitrite for anammox process ranges from 0.89 to 1.22 and ammonium removal rate varies from 0.08 to 0.59 mg-N/liter hour.
Universitas Diponegoro
2023-08-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/54330
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 2 (2023): July 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/38339
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
Home Biogas Production using Homemade Bio-activator with Chicken Manure
Surianto, Heru
Universitas Andalas
Raharjo, Slamet
Universitas Andalas
Wulandari, Suci
Universitas Andalas
Array
The previous experiment was obtained that homemade activator is the best activator to produce biogas by using food waste consist of vegetable, fruit and rice waste. The current research is carried out by adding chicken manure as a co-activator. Chicken manure content rich in nitrogen can be significantly enhance biogas production. This study is expected to increase the biogas production. There are two processes conducted at the laboratory scale, batch and semi-continuous process. The batch process aim to activate bacteria. The ratio set at food waste/chicken manure, 2 : 1 of digester #1, 3 : 1 of digester #2, 4 : 1 of digester #3 and digester control using food waste only. Stage two aims to produce biogas by adding food waste for 6 days periodically. The ratio is set at food waste/water, 1 : 2. The highest biogas yielded is digester 2 with a cumulative volume biogas 120.77 liters consist of 71.01% CH4, 26% CO2, 2.9% O2 and 0.088% H2S. The potential of methane gas produced is 0.87 kWh and methane volume per TS and VS at around 18.72 L/kg and 34.68 L/kg, respectively.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/38339
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14720
2020-04-17T18:34:28Z
presipitasi:RSA
"170515 2017 eng "
2550-0023
1907-817X
dc
PENENTUAN FORMULA PENAMBAHAN VOLUME AIR KONSTAN PADA PENGOMPOSAN SAMPAH DAUN
Samudro, Ganjar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Sumiyati, Sri
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Ratna, Dian Asri Puspa
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Hastuti, Sindi Martina
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Kurnia, Vaneza Citra
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Hadiwidodo, Mochtar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Penambahan volume air pada pengomposan sampah daun masih dilakukan secara manual, membutuhkan waktu yang banyak, dan tenaga kerja yang besar. Tujuan penentuan ini dimaksudkan untuk mendapatkan formula penambahan volume air konstan pada pengomposan sampah daun secara kontinyu. Metode penelitian diawali dengan observasi penelitian hubungan waktu terhadap kadar air berdasarkan variasi kadar air yang diinginkan 50% dan 60% sebagai kadar air optimum dalam proses pengomposan, kemudian dilanjutkan analisis kuantitatif deskriptif dalam penentuan formula. Formula penambahan volume air konstan pengomposan sampah daun sebagai berikut: debit input (mL/L/hari): y = 1,764e0,048x, volume air (mL/L): y = 10,01e0,049x, dan volume air (%):y = -0,698x + 61,09.
Universitas Diponegoro
2017-05-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/14720
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 1 (2017): Maret 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/44396
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
STEM-Blended Learning Regarding Earthquake Disaster: Prospective Teachers Perception
Ardianto, Didit
Universitas Pakuan
Rubini, Bibin
Universitas Pakuan
Pursitasari, Indarini Dwi
Universitas Pakuan
Rachman, Indriyani
The University of Kitakyushu
Array
This study aims to determine student teacher perceptions of the implementation of STEM-Blended learning. The subjects involved in this study consisted of 25 4th semester students in the elementary school teacher program. The instruments used include closed questionnaires and open questionnaires. The results showed that students gave a positive attitude towards scientific and engineering practices in the lecture process. In addition, they are also very motivated to create a prototype design that integrates STEM
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/44396
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/18007
2020-04-17T18:36:01Z
presipitasi:RSA
"180329 2018 eng "
2550-0023
1907-817X
dc
Pemilihan Metode Analisis Debit Banjir Rancangan Embung Coyo Kabupaten Grobogan
Sarminingsih, Anik
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro http://orcid.org/0000-0002-8550-5803
Array
Debit banjir rancangan merupakan salah satu parameter perencanaan bangunan air. Besaran debit banjir rancangan akan sangat berpengaruh pada dimensi serta tingkat stabilitas struktur bangunan. Rencana embung Coyo terletak di sungai Lampis, secara administrasi berada di antara desa Sidorejo dan desa Mlowokarangtalun kecamatan Pulokulon Kabupaten Grobogan. Untuk merencanakan dimensi bangunan pengelak digunakan Q25th, sementara untuk bangunan pelimpah digunakan Q100th. Tidak tersedianya data debit pengamatan pada lokasi kajian mengakibatkan analisis debit banjir dilakukan dengan model hujan-limpasan berdasarkan karakteristik DAS. Adanya fungsi tampungan maka diperlukan banjir rancangan dalam bentuk hidrograf. Beberapa metode analisis hidrograf yang sering digunakan di Indonesia di antaranya model Hidrograf satuan sintetik (HSS) Snyder dan HSS Nakayasu. Pemilihan besaran debit banjir dengan membandingkan hasil analisis dari berbagai metode tersebut dengan kapasitas penampang sungai (full bank capacity), dengan debit rencana kala ulang 2-5 tahun. Berdasarkan hujan rancangan dan karakteristik DAS Coyo dengan luas 69,56 km2 , metode analisis debit banjir yang paling sesuai adalah HSS Nakayasu. Besarnya debit banjir rancangan Q25th = 255.31m3/det, dan Q100th = 327.70 m3/det.
Universitas Diponegoro
2018-03-29 12:24:08
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/18007
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 1 (2018): Maret 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/42962
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
The Effect of Environmental Quality and Gender Inequality on Human Well-Being in Indonesia during Pandemic Covid-19
Oktavilia, Shanty
Universitas Negeri Semarang
Setyadharma, Andryan
Universitas Negeri Semarang
Wahyuningrum, Indah Fajarini Sri
Universitas Negeri Semarang
Yuneldi, Tania Wicaksana
Universitas Negeri Semarang
Array
This study examines the impact of environmental quality and gender equality on human welfare in Indonesia from 2015-2020, using a panel database of 33 provinces. The results of the model selection testing with the Chow test and the Hausman test recommend regression analysis using the Fix Effect Model (FEM). This study resulted in the finding that there is a unidirectional and significant relationship between gender equality and human well-being. That means that gender inequality has the opposite effect. The second finding is that statistically, there is a positive relationship between environmental quality and human welfare in the case of provinces in Indonesia. The estimation results show that economic growth has a positive and significant relationship with human well-being in Indonesia. This study indicates that human well-being in Indonesia before and during the Covid-19 pandemic shows differences. The novelty of this study is to analyze the effect of gender equality and environmental quality indicators in influencing human welfare. In addition, this research also accommodates the Covid-19 pandemic period in an empirical model.
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/42962
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/21022
2020-04-17T18:37:47Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
KAJIAN PERUBAHAN TATAGUNA LAHAN TERHADAP TINGKAT BAHAYA EROSI DI DAS DENGKENG
Sarminingsih, Anik
Departemen TeknikLingkungan,Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Array
Daerah Aliran Sungai (DAS) Dengkeng merupakan salah satu Sub DAS Bengawan Solo Hulu, yang sebagian besar wilayahnya berada di kabupaten Klaten Jawa Tengah.DAS Dengkeng terindikasi sebagai salah satu DAS kritis dengan potensi rawan banjir cukup besar.Salah satu penyebab banjir adalah sungai yang semakin dangkal akibat erosi dan sedimentasi.Penelitian ini dilakukan untuk mengevaluasi perubahan tataguna lahan terhadap tingkat bahaya erosi.Prediksi Erosi didasarkan pada penelitian Wischmeier dan Smith yang menyajikan Persamaan Universal Soil Loss (USLE).Jumlah sedimen yang diangkut di sungai dengan mengalikan tingkat erosi dengan rasio pengiriman sedimen (SDR).Potensi erosi dan sedimentasi mengacu pada penggunaan lahan yang berbeda, yaitu 1990, 2000 dan 2011. Secara umum di DAS Dengkeng telah terjadi peningkatan rata-rata tingkat erosi dari 70.60 ton / ha / tahun pada tahun 1999 menjadi 76.82 ton / ha / tahun. 2011atau jika diklasifikasikan berdasarkan tingkat bahaya erosi dengan solum tanah dangkal, maka TBE tergolongsedang menuju ke berat.Peningkatan laju erosi tidak terlampu signifikan karena mayoritas penggunaan lahan adalah sawah.TBE yang tergolong berat berada pada wilayah lahan kering dengan kelerengan curam.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/21022
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/50988
2023-04-09T04:36:46Z
presipitasi:RSA
"230330 2023 eng "
2550-0023
1907-817X
dc
Nutrient Recovery from Agricultural Waste Water Using Electrocoagulation Process, A Case Study of Thekelan, Semarang, Indonesia
Budihardjo, Mochamad Arief
Universitas Diponegoro
Sudarno, Sudarno
Universitas Diponegoro
Priyambada, Ika Bagus
Universitas Diponegoro
Chegenizadeh, Amin
Curtin University
Purwono, Purwono
Universitas Islam Negeri Raden Mas Said Surakarta
Array
Eutrophication is a natural phenomenon in aquatic ecosystems that causes algae and other aquatic plants to overproduce. This process can benefit the ecology in tiny amounts, but too many nutrients can generate hazardous algal blooms and kill fish and other aquatic life. To prevent eutrophication and sustain aquatic ecosystems, agricultural waste water like microalgae production wastewater must be treated. The goal of the project is to get nitrogen and phosphorus out of the wastewater from growing microalgae, which is an agricultural waste water. One way to recover nutrients from wastewater is electrocoagulation. This procedure uses an electric current to create microscopic gas bubbles that collect and remove pollutants from wastewater. According to this study, electrocoagulation reduces phosphate and nitrate in microalgae culture wastewater. Phosphate concentration dropped by 90.20% in the 15th minute, while nitrate concentration dropped by 36.19% in the 30th minute. These reductions may be caused by struvite formation and nitrate conversion to nitrogen gas. This study demonstrates that electrocoagulation is a potential technology for recovering nutrients from agricultural waste water and reducing aquatic ecosystem eutrophication.
Universitas Diponegoro
2023-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/50988
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 1 (2023): March 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/26706
2020-08-31T06:24:22Z
presipitasi:RSA
"191126 2019 eng "
2550-0023
1907-817X
dc
Application of Bio-pore to Increase Rainwater Absorption in Residential Areas
Samadikun, Budi Prasetyo
Universitas Diponegoro
Array
Seiring dengan meningkatnya kondisi perekonomian keluarga dan kebutuhan akan ruang di Perumahan Permata Tembalang, kavling yang pada awalnya masih memiliki lahan terbuka cukup luas secara bertahap mulai berkurang, karena penghuni sudah mulai memperluas lahan terbangun di kavling rumahnya. Pada akhirnya, tidak tersisa sedikit pun lahan terbuka untuk peresapan air hujan ke dalam tanah. Tujuan dari paper ini adalah untuk mengetahui tingkat kesadaran masyarakat terhadap arti penting lahan terbuka sebagai sarana peresapan air hujan melalui penerapan biopori. Metode penerapan biopori dilakukan dalam beberapa tahap: koordinasi, sosialisasi, pelaksanaan, dan monitoring-evaluasi. Untuk mengetahui tingkat kesadaran warga, dilakukan observasi dan wawancara kepada warga yang sudah mengikuti sosialisasi dan menerapkan biopori di kavling rumahnya. Hasil observasi dan wawancara menunujukkan warga cukup antusias dalam penerapan biopori ini, terbukti dengan respon yang sangat baik sejak tahap koordinasi sampai dengan tahap monitoring-evaluasi. Hasil akhir menunjukkan warga dapat memahami sedari dini akan arti penting lahan terbuka sebagai peresapan air hujan, sehingga dengan sadar sudah mulai tergerak dan juga terdorong untuk mengaplikasikan biopori di kavling rumahnya masing-masing.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/26706
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
ind
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/26112
2020-08-31T05:28:29Z
presipitasi:RSA
"200331 2020 eng "
2550-0023
1907-817X
dc
Synthesis of Sodium Zirconia as a Catalyst for Transesterification Reaction of Used Cooking Oil
Agustin, Niyar Candra
Universitas Pandanaran
Prasdiantika, Ricka
Universitas Pandanaran
Array
Katalis merupakan salah satu faktor yang dapat mempengaruhi hasil reaksi kimia. Katalis memiliki sifat spesifik yang hanya dapat digunakan pada reaksi tertentu. Sehingga untuk melakukan reaksi transesterifikasi dibutuhkan katalis yang sesuai dan mempunyai daya yang optimal agar menghasilkan produk. Pada penelitian ini dilakukan sintesis natrium zirkonia (Na2O/ZrO2) sebagai katalis reaksi transesterifikasi minyak goreng bekas menjadi biodiesel. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi larutan NaOH pada sintesis katalis zirkonia (ZrO2). Katalis Natrium zirkonia (Na2O/ZrO2) disintesis menggunakan metode impregnasi basah dengan mencampurkan padatan ZrO2 dan larutan NaOH pada variasi konsentrasi 2, 4, dan 6 M. Reaksi transesterifikasi dilakukan dengan jumlah katalis sebanyak 3% (b/b), waktu reaksi selama 20 menit, dan pemanasan microwave pada daya 400 watt. Perbandingan molar minyak dengan metanol yang digunakan pada penelitian ini yaitu 1:15. Katalis Na2O/ZrO2 dikarakterisasi dengan Fourier Transform Infrared (FT-IR) Spectrophotometer, X-Ray Difraktometer (XRD), dan Scanning Electron Microscopy/Energy Dispersive X-ray (SEM/EDX). Biodiesel yang dihasilkan dikarakterisasi dengan Gas Chromatography–Mass Spectrometry (GC-MS). Penggunaan katalis Na2O/ZrO2 2M menghasilkan produk biodiesel yang paling banyak yaitu sebesar 85,5% (b/b). Biodiesel yang terbentuk mengandung metil palmitat (25,11%), metil linoleat (10,87%), metil elaidat (57,88%), dan metil stearat (6,14%). Hasil karakterisasi menunjukkan bahwa Na2O/ZrO2 sebagai katalis reaksi transesterifikasi minyak goreng bekas berhasil disintesis.
Universitas Diponegoro
2020-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/26112
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 1 (2020): Maret 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/31192
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Economic Feasibility Analysis of Household Plastic Waste Management Using Trichoderma sp.
Zulaika, Aidha
Universitas Binawan
Soesilo, Tri Edhi Budhi
Universitas Indonesia
Noriko, Nita
Universitas Al-Azhar Indonesia
Sahamony, Nur Fitriyani
Universitas Binawan
Array
Pengolahan dan pengelolaan sampah plastik harus dilakukan melalui penerapan keberlanjutan lingkungan yang mampu mengintegrasikan pengelolaan berbasis ekologi dan mempertimbangkan dinamika sosial dan ekonomi yang dikenal dengan Socio-Ecological System (SES). Tujuan penelitian ini adalah untuk menentukan kelayakan ekonomi pengelolaan sampah plastik rumah tangga menggunakan Trichoderma sp.. Metode penelitian yang digunakan adalah observasi pengelolaan sampah plastik yang ada di masyarakat dan pengolahan data sekunder hasil penelitian lapangan pengolahan sampah plastik dengan Trichoderma sp. Analisis data dilakukan dengan menerapkan analisis ekonomi menggunakan analisis Benefit Cost Ratio (BCR). Berdasarkan analisis ekonomi didapati 1,29 nilai BCR untuk pengolahan sampah plastik dengan menggunakan Trichoderma sp.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/31192
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/36002
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Serunting, Muhamad Allan
Institut Teknologi Sumatera https://orcid.org/0000-0003-0716-414X
Santoso, Prio
https://orcid.org/0000-0003-2565-5444
Sari, Indah Puspita
Widodo, Riyanto
The synthesis of silver nanoparticles using the green chemistry concept utilizing Java long pepper leaf extract as a reducing agent has been successful. Silver nanoparticles were synthesized under optimum 1 mM silver nitrate concentration, 250 μL Java long pepper leaf extract, and 30 minutes under sunlight radiation. The silver nanoparticles formed can be confirmed by the change in the color of the solution from colorless to brownish red, indicating a reduction of Ag+ to Ag0. The Uv-vis spectrum showed a peak Surface Plasmon Resonance (SPR) at 441 nm. The FTIR spectrum showed that functional groups' vibrations in the Java Chili Leaf extract confirm that the phenol, alkaloid, and flavonoid compounds present in the extract act as reducing agents. TEM images show spherical silver nanoparticles with an average diameter of 17.65 nm. The potential of silver nanoparticles to detect Hg (II) metal is evidenced by a decrease in the color intensity of the silver nanoparticle solution along with the increasing concentration of Hg (II), which reacts back-oxidizing Ag0 to Ag+. The value of the correlation coefficient of the linear equation is 0.9807.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/36002
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/37122
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Coconut shell-based activated carbon preparation and its adsorption efficacy in reducing BOD from The Real Wastewater from Kitchen Restaurant (RWKR): Characteristics, Sorption Capacity, and Isotherm Model
Yasdi, Yasdi
Universitas Jambi
Ussarvi, Dhea
Universitas Jambi
Rinaldi, Rinaldi
Universitas Jambi
Juita, Febri
Universitas Jambi
Cahyani, Shassy Endah
Wageningen University and Research
Array
Real Wastewater from Kitchen Restaurant (RWKR) contains high concentrations of Biochemical Oxygen Demand (BOD) pollutants to pollute the environment. One of the processing alternatives to reduce BOD is the adsorption method using activated carbon from coconut shells. This study aims to determine coconut shell-activated carbon as an adsorbent for the adsorption of organic matter to reduce BOD in RWKR. The method begins with making adsorbents that are activated with activators on HCl 3 M, NaOH 3 M, and H3PO4 M, then a preliminary adsorption test is carried out to select the best activator on coconut shell activated carbon to reduce BOD in RWKR. Determining the optimum conditions for adsorption was carried out by varying pH 3, 4, 5, 6, 7, and 8. Variation of contact time with a stirring speed of 250 rpm, then determined the isotherm model. The remaining organic matter in the wastewater will be measured using a DO meter based on SNI 6989.72: 2009 concerning the method of testing for biochemical oxygen demand (BOD). The results showed that the appropriate activator for coconut shell activated carbon was H3PO4 3 M with an average percentage value of uptake of 89.690%. The adsorption process's optimum pH is at pH 3 with an absorption percentage value of 88.626%. The optimum contact time is at 10 minutes and the adsorption isotherm model used is the Freundlich isotherm with a regression value of R2 = 0.8864.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/37122
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/37122/112034
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14714
2020-04-17T18:33:48Z
presipitasi:RSA
"170515 2017 eng "
2550-0023
1907-817X
dc
KARAKTERISTIK BRIKET DARI KOMPOSIT SAMPAH BUAH, SAMPAH PLASTIK HIGH DENSITY POLYETHYLENE (HDPE) DAN TEMPURUNG KELAPA SEBAGAI BAHAN BAKAR ALTERNATIF DI RUMAH TANGGA
Ruslinda, Yenni
Jurusan Teknik Lingkungan, Fakultas Teknik, Universitas Andalas
Husna, Fitratul
Jurusan Teknik Lingkungan, Fakultas Teknik, Universitas Andalas
Nabila, Arum
Jurusan Teknik Lingkungan, Fakultas Teknik, Universitas Andalas
Array
This study aims to examine the characteristics of briquettes from fruit waste, HDPE plastic waste, and coconut shell composite, as an alternative fuel. Characteristic tests include physical characteristics (density and compressive strength), chemical characteristics (moisture, volatile content, fixed carbon, ash content, calorific value), and cost calculation for making briquettes. Physical characteristics tests obtained that density is between 0.60 to 0.89 g/cm3 and compressive strength is between 0.88 to 6.87 kg/cm2. Chemical characteristics tests found that water content 5.73 - 9.06%; volatile content 70.02 - 79.92%; fixed carbon 12.39 - 18.41%; ash content of 1.47 - 4.86%, and calorific value 4549 - 7213 cal/g. Cost for making briquettes range between 0.56 to 0.86 rupiahs/kcal. Except for compressive strength parameter, other parameters are in the standard range of biobriquettes quality according to Permen ESDM No. 047 Tahun 2006. Optimum briquette found in this research is a mixture of 20% fruit waste, 20% of plastic waste HDPE, and 60% coconut shell. Briquettes made as a mixture of those three raw material with that composition is optimum as an alternative fuel, because it produces higher calorific value and lower cost.
Universitas Diponegoro
2017-05-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/14714
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 1 (2017): Maret 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/42121
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
Electrocoagulation Method Using Al/Graphite Electrode for Removal Surfactant LAS (Linear Alkylbenzene Sulfonate)
Khairunisa, Nafisa
Diponegoro University
Suhartana, Suhartana
Diponegoro University https://orcid.org/0000-0003-1458-7335
Bima, Damar Nurwahyu
Diponegoro University http://orcid.org/0000-0002-3793-8057
Array
An increasing number of laundries have caused water contamination by surfactants. One commonly used surfactant is LAS (Linear Alkylbenzene Sulfonate), a material difficult to decompose, polluting the environment. Electrocoagulation was carried out using Al/Graphite electrode, applied to LAS surfactant artistic waste. This study aims to determine the functional ability of the Al/Graphite electrode in reducing surfactant through electrocoagulation. Various variations were carried out, on the voltage parameters (3,6,9,12) Volt; NaCl concentration (0;0.4;0.8;1.2;1.6;2) g/L; pH (3,5,7,9,11) and time (10,20,30,40,50) minutes. To analyze the changes in the sample before and after electrocoagulation, characterization was carried out using a UV-VIS spectrophotometer and FTIR. A kinetic study was conducted to determine the reaction order of electrocoagulation surfactant. Based on a study, removal at condition voltage 9 Volt, initial pH of the solution 9, electrocoagulation time 50 minute, and the addition of NaCl electrolyte 2 g/L, obtained surfactant concentration was 0,785 mg/L with removal efficiency 97,45%. UV-VIS spectra show a decreased absorption at a wavelength of 653 nm. FTIR spectra showed the presence of absorption on the same functional groups, which indicated that most of the surfactant pollutants could be separated from the wastewater through the electrocoagulation process. The second-order reaction was obtained in the surfactant electrocoagulation process.
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/42121
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/16919
2020-04-17T18:35:40Z
presipitasi:RSA
"180329 2018 eng "
2550-0023
1907-817X
dc
Kajian Dampak Rencana Pembangunan Kawasan Wisata Marina di Pesisir Kabupaten Belitung terhadap Kualitas Lingkungan Sekitarnya
Wibowo, Mardi
Balai Teknologi Infrastruktur Pelabuhan dan Dinamika Pantai - BPPT http://orcid.org/0000-0003-3591-8631
Array
Pada dasarnya semua kegiatan pembangunan khususnya di kawasan pesisir akan menimbulkan perubahan terhadap lingkungan sekitarnya baik yang positif maupun negatif. Tidak terkecuali rencana pembangunan kawasan marina di pantai Tanjungpendam Kabupaten Belitung pasti akan menimbulkan dampak terhadap kualitas lingkungan perairan di sekitarnya. Metode yang dipakai dalam kajian ini adalah kompilasi dan analisis data sekunder, melakukan tinjauan dan observasi lapangan, analisis data sekunder yang ada, analisis desain kawasan marina yang akan dibangun, memperkirakan dampak lingkungan serta menyusun usulan untuk pengelolaan dan pemantauan dampak yang mungkin terjadi. Pada tahap konstruksi dan operasional kawasan marina, dampak terhadap lingkungan yang mungkin terjadi adalah menurunnya kualitas perairan laut, kualitas udara, terjadinya perubahan pola arus, abrasi dan sedimentasi serta terganggunya kehidupan biota yang ada di sekitar dermaga. Dampak-dampak lingkungan yang ditimbulkan umumnya dikategorikan sebagai dampak negatif dan bersifat terus menerus. Untuk meminimalisir dampak negatif yang mungkin timbul diperlukan adanya upaya pengelolaan lingkungan dan upaya pemantauan lingkungan.
Universitas Diponegoro
2018-03-29 12:24:08
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/16919
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 1 (2018): Maret 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/46520
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
Depth Profiles of Dissolved Oxygen (DO) and Hydrogen Sulfide (H2S) Concentration in a Tropical Freshwater Reservoir
Wardhani, Eka
Institut Teknologi Nasional Bandung
Sugiarti, Zulfah Ananda
Institut Teknologi Nasional Bandung
Array
This study aims to determine the profile of dissolved oxygen and H2S based on depth in the Jatiluhur Reservoir related to fish culture in floating net cages. The scope of this research is focused on the location of floating net cage cultivation. Dissolved oxygen distribution is classified as a positive heterograde type where dissolved oxygen levels higher in the metalimnion layer due to the photosynthesis process that occurs effectively by aquatic plants and phytoplankton. Jatiluhur Reservoir shows signs of organic pollution, with BOD5 and COD levels exceeding the quality standard. This organic substance comes from the waste of floating net cages. BOD5 and COD values that exceed the quality standard result in increased oxygen consumption during the decomposition process; therefore, a hypoxic layer occurs. This occurrence can cause water conditions to become anoxic, producing H2S gas. The H2S value in the Jatiluhur Reservoir was observed to exceed 0.002 mg/L and showed an increase in the metalimnion layer.
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/46520
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/46520/148459
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20801
2020-04-17T18:37:02Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
ANALISIS FLUKTUASI PEMAKAIAN AIR PDAM TIRTA MOEDAL KOTA SEMARANG WILAYAH STUDI DMA TEJOSARI DAN MEGA BUKIT MAS
Prasasti, Riski Adyan
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Samudro, Ganjar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Array
Setiap wilayah memiliki pemakaian air yang berbeda-beda pada setiap jam dan hari sebagai fluktuasi pemakaian air. Dengan pemakaian air yang berbeda-beda, maka sistem penyediaan air membutuhkan suplai air yang berbeda pula, sesuai dengan fluktuasi pemakaian air tiap wilayah. Dengan mengetahui fluktuasi pemakaian air, maka operasi sistem penyediaan air minum dapat direncanakan untuk memenuhi kebutuhan air. Penelitian ini bertujuan untuk merencanakan operasional sistem penyediaan air secara efisien berdasarkan fluktuasi pemakaian air. Dalam penelitian ini, wilayah kajian adalah DMA Tejosari dan Mega Bukit Mas, PDAM Tirta Moedal Kota Semarang Cabang Semarang Selatan. Pengambilan data didapatkan dari pembacaan meter induk di wilayah studi selama tujuh hari. Hasil penelitian ini didapatkan bahwa jam puncak penggunaan air berada pada jam pertama air mengalir, dengan faktor jam puncak secara berturut-turut adalah 1,64 dan 1,68. Sedangkan untuk faktor harian maksimum kedua DMA sebesar 1,25. Selain untuk mengetahui faktor jam puncak dan harian maksimum, pembacaan meter induk juga bertujuan untuk mengetahui volume reservoir yang dibutuhkan yaitu sebesar 628,25 m3 untuk DMA Tejosari.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20801
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/19047
2018-10-24T11:25:16Z
presipitasi:RSA
oai:ojs.ejournal.undip.ac.id:article/24011
2020-04-17T18:38:44Z
presipitasi:RSA
"190731 2019 eng "
2550-0023
1907-817X
dc
Indeks Pencemaran Lingkungan Secara Fisika-Kimia dan Biokonsentrasi Timbal (Pb) pada Kerang Hijau di Perairan Pesisir Semarang Utara
Khusnia, Arsika Zuhrotul
Universitas Diponegoro
Astorina, Nikke
Universitas Diponegoro
Rahardjo, Mursid
Universitas Diponegoro
Array
The North Semarang ocean are functioned for high activity area also utilization in one site. The entry of waste into the waters or oceans caused the decrease of water quality. Lead (Pb) entered to North Semarang oceans by kind of activities there. The aims of this researc are to describe pollution index and bioconcentration in the study location. This reasearch is descriptive observational with cross sectional study. Sampling location determined beside on zoonation.Twenty four (24) samples were determined purposively besed on location, wind direction and current type. The samples was measured in situ and laboratory test. The average of pH was 8,05 , temperature was 31,38°C, salinity was 28,4 ppt, DO was 4,07 mg/L and lead (Pb) was 0,99 mg/L. The average of dissolved oxygen not in accordance with quality standards (>5 mg/l) also lead (Pb) average is higher than standard (0,008 mg/l). Calculation of pollutan index in North Semarang ocean categorized as moderate polluted and the lead (Pb) bioconcentration on Perna viridis categorized as low accumulative with the value of BCF was 0,62 L/kg (BCF<100). All of samples classified as moderate polluted which caused bioconcentration and low bioacumulation on Perna viridis so that it is harmful for human health.
Universitas Diponegoro
2019-07-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24011
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 2 (2019): Juli 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/52070
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
Thermal Comfort and Cognitive Performance under Glass Facade Buildings
Rizkiyah, Ega
Institut Teknologi Sepuluh Nopember https://scholar.google.com/citations?user=ZeoERyYAAAAJ&hl=id&oi=ao
Mahachandra, Manik
Universitas Diponegoro https://scholar.google.com/citations?user=r8_g9R4AAAAJ&hl=id&oi=ao
Purwaningsih, Ratna
Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=86O5CKsAAAAJ&view_op=list_works&sortby=pubdate
Prastawa, Heru
Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=YrjFKbUAAAAJ
Budiawan, Wiwik
Universitas Diponegoro https://scholar.google.com/citations?hl=id&user=TvY492MAAAAJ
Array
Glass is one of the most adaptable modern materials. However, the use of glass can have unfavorable effects such as glare, heat, and discomfort. This study focuses on the issue of designing contemporary glass buildings and facades in humid tropical environments to evaluate the thermal comfort of building occupants and assess its effects on the completion of cognitive tasks. The Wet-Bulb Globe Temperature (WBGT) parameter was used to measure thermal comfort, and the ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) scale was used to assess thermal comfort perception. The Montreal Cognitive Assessment was used to assess eight female respondents’ cognitive abilities, and the cut-off point was 26. The WBGT has a temperature range of 25, 54°–28, 83°C, in terms of thermal sensation, 54% of respondents feel hot and 62% are uncomfortable. In the completion of cognitive tasks, 75% received a score of less than 26. The results show that there is an effect of thermal comfort on cognitive performance. Due to respondents feeling uncomfortable in high-rise buildings with glass facades, as well as with cognitive outcomes that are below the cut-off point, recommendations for improvement are needed to increase thermal comfort, such as double glass facades.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/52070
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/52070/170830
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/52070/170831
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/58109
2024-03-11T13:51:05Z
presipitasi:RSA
"240331 2024 eng "
2550-0023
1907-817X
dc
Biochar-Based Subsurface-Flow Wetland from Crumb Rubber Scrap in Treatment of Landfill Leachate
Riyanti, Anggrika
Universitas Batanghari http://orcid.org/0000-0001-6108-2239
Hadrah, Hadrah
Universitas Batanghari
Kasman, Monik
Universitas Jambi
Ramadan, Bimastyaji Surya
Universitas Diponegoro
Saputra, Iwan
Universitas Batanghari
Fitri, Riska Rahmah Dani
Universitas Diponegoro
Array
Leachate resulting from the decomposition of organic waste is still a challenging problem, especially in landfill management. Constructed wetlands (CW) are effective, economical, and environmentally friendly options to treat landfill leachate. Biochar added into CW as a pollutant adsorbent in leachate treatment. This study aimed to determine the effectiveness of sub-surface flow CW amended with biochar in reducing leachate pollutants. Biochar was synthesized from crumb rubber scrap waste using pyrolysis. The variation biochar in CW i.e. CW0 without biochar as a control system, CW1 10% biochar, CW2 20% biochar, and CW3 30% biochar. Leachate samples flowed into each CW reactor for 10 days of retention time. The scanning electron showed that the biochar pores ranged from 5-10 կm, containing elements of C, O, Ca, N, Mg, Al, Si, and Fe. Some elements have greater cumulative mass and atomic percentage values i.e. C 34.51%, O 26.54%, and Ca 21.85%. The result of CW treatment showed that the CW system was able to remove 76-88% BOD5, 70-87% COD, and 67-81% TSS. The addition of biochar in CW increased pollutant removal by 7-14%, showing that biochar is able to increase pollutant adsorption in wastewater and improve CW performance. Furthermore, converting organic waste into biochar is highly recommended as a sustainable way to generate useful resources.
Universitas Diponegoro
2023-11-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/58109
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Article in Press 2024
eng
Copyright (c) 2024 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/28550
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Treatment of Pb(II) Metal in Wastewater Using Combination Method of Electrocoagulation − Activated Carbon Adsorption
Setiawan, Adhi
Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=z_XYZ3MAAAAJ&hl=id&oi=ao
Ramadani, Tarikh Azis
Politeknik Perkapalan Negeri Surabaya
Hanastasia, Rizka Lutfita
Politeknik Perkapalan Negeri Surabaya
Array
Logam berat Pb(II) merupakan jenis polutan yang menyebabkan pencemaran air serta berdampak terhadap kerusakan ekosistem. Limbah logam Pb(II) bersifat racun serta biomagnifikasi sehingga berdampak negatif terhadap kesehatan manusia. Kombinasi proses elektrokoagulasi dan adsorpsi merupakan salah satu alternatif yang efisien serta efektif dalam menghilangkan logam Pb(II) di dalam air limbah. Pada penelitian ini, proses pengolahan air limbah dilakukan secara batch menggunakan elektrokoagulasi dengan elektroda aluminium dan dilanjutkan dengan adsorpsi karbon aktif. Penelitian ini bertujuan menganalisis pengaruh tegangan elektrokoagulasi, waktu kontak adsorpsi, dan dosis adsorben terhadap penurunan konsentrasi Pb(II). Proses elektrokoagulasi dan adsorpsi menggunakan variasi tegangan (10, 20, 30 V), waktu adsorpsi (15, 30, 45 menit), serta dosis adsorben (2,5, 3,3, 4,1, 5 g/L). Hasil penelitian menunjukkan bahwa kombinasi elektrokoagulasi dan adsorpsi dapat menurunkan konsentrasi Pb(II) dalam air limbah secara signifikan. Peningkatan tegangan listrik, waktu adsorpsi, dan dosis adsorben menyebabkan meningkatnya efisiensi penyisihan Pb(II). Efisiensi penyisihan logam Pb(II) maksimal diperoleh pada kondisi tegangan 30 V, waktu adsorpsi 45 menit, serta dosis adsorben 5 g/L. Pada kondisi tersebut diperoleh efisiensi penyisihan Pb(II) sebesar 96,01%.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/28550
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/33579
2020-12-17T04:33:05Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Improving Sustainability Performance with Eco-Efficiency Strategies: A Case Study in SME Batik SS Jogja
Hartini, Sri
Universitas Diponegoro
Yulianto, Prasetyo
Universitas Diponegoro
Array
Batik merupakan produk unggulan bangsa Indonesia sekaligus Warisan Budaya Dunia. Namun proses produksi ditengarai berpotensi membahayakan lingkungan. Penelitian ini bertujuan untuk menganalisis proses produksi Batik menggunakan pendekatan eco-efficiency. Tahap identifikasi dilakukan dengan mengidentifikasi biaya non product output. Analisis dampak lingkungan dilakukan dengan life cycle assessment (LCA) dengan metode eco-cost dan eco-mapping. Tahap analisis sebab dilakukan dengan fishbone diagram. Area permasalahan terjadi pada proses pengecapan, pewarnaan dan penglorodan. Pengolahan LCA menggunakan software simapro v7.1.8 menyimpulkan bahwa terdapat dampak negatif pada kategori global warming (CO2 eq) sebesar 14.804,2 kg dan aquatic ecotoxic (TEG eq) sebesar 10.241.717 kg atau setara dengan biaya lingkungan sebesar Rp 700.394.880/tahun. Rekomendasi perbaikan dengan membuat bak penampung lilin, penambahan penugasan bagi salah satu pekerja, dan membuat sistem pengolahan limbah sederhana dengan prinsip pengolahan secara biologi aerob. Penelitian ini memberikan keuntungan secara ekonomis, lingkungan dan sosial. Rekomendasi yang diberikan diestimasi dapat menurunkan rasio non product output sebesar 0,01224 dengan keuntungan ekonomis berkisar Rp 25.571.892/ tahun
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/33579
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/36086
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Biofilm Formation and Bio Corrosion of Carbon Steel in Diesel-Biodiesel Storage Tank
Ramadhani, Aida Nur
Universitas Sebelas Maret
Harimawan, Ardiyan
Institut Teknologi Bandung
Devianto, Hary
Institut Teknologi Bandung
Array
Biodiesel is potential to blend with petroleum diesel as an alternative blended fuel. Biodiesel is usually stored in carbon steel storage tank which easily corroded by microorganisms. Microorganisms can use blended fuels as carbon source and water from biodiesel which is hygroscopic for growth and metabolism. Thus, degradation of fuel may occur and lead to biocorrosion by microorganisms such as Bacillus megaterium. This research was conducted to determine the effect of biodiesel concentration of blended fuel on biofilm formation and biocorrosion by Bacillus megaterium. The experiments were carried out by immersing carbon steel specimens in immersion medium for 21 days with variation of biodiesel concentration (B0, B20, B30, and B100). Biofilms that form on the metal surface cause areas with non-uniform oxygen concentrations and form anodic/cathodic conditions, raised to potential differences and biocorrosion occurred. The average corrosion rates were 0,035 ± 0,03; 0,533 ± 0,33; 0,642 ± 0,28; 0,109 ± 0,04 mm/year achieved by B0, B20, B30 and B100 respectively. These rates increased when compared to the control medium. Microorganism activity also caused damage to the metal surface by forming pitting corrosion on B30 and B100.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/36086
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/12485
2020-04-17T18:33:09Z
presipitasi:RSA
"161029 2016 eng "
2550-0023
1907-817X
dc
KONSERVASI ENERGI BERBASIS RENEWABLE ENERGY TECHNOLOGY DENGAN PEMANFAATAN TEKNOLOGI MICROBIAL
Samudro, Ganjar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Array
Penggunaan energi yang besar meningkatkan emisi CO2 yang terlepas ke atmosfer. Upaya konservasi energi terus dilakukan dalam rangka meningkatkan kebutuhan energi. Bentuk konservasi energi berbasis renewable energy technology dengan pemanfaatan teknologi microbial merupakan bentuk ideal back to nature dan lebih ramah lingkungan untuk masa depan lingkungan yang lebih baik. Penelitian-penelitian berbasis teknologi microbial dengan basis modifikasi teknologi konvensional dengan advanced menjadi pilihan terbaik dalam capture energi besar, kebutuhan energi nol, revenue listrik tinggi dan biaya operasional yang rendah. Pilihan inovasi teknologi ini membuka wacana pengembangan inovasi teknologi microbial lainnya dan memberikan kontribusi pengurangan emisi CO2 dari suatu proses. Hasilhasil penelitian terbaru dengan reaktor MFCs sebagai salah satu teknologi microbial didapatkan kecenderungan positif dalam
pemanfaatannya dalam skala yang lebih besar dan aplikatif.
Universitas Diponegoro
2016-10-29 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/12485
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 13, No 2 (2016): September 2016
eng
Copyright (c) 2016 Jurnal Presipitasi
oai:ojs.ejournal.undip.ac.id:article/39918
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
Re-layout of Temporary Storage Area for Toxic and Hazardous Waste using 5S (Seiri, Seiton, Seiso, Seiketsu, Sitsuke)
Adelino, Muhammad Ilham
Putra Indonesia University
Fitri, Meldia
Putra Indonesia University
Sundari, Ayu
Putra Indonesia University
Array
One of the industries that produces toxic and hazardous waste is rubber industry. This study was conducted in PT. Famili Raya. The problem was toxic and hazardous waste placed in an irregular placement and no follow the government regulations for storing and managing. This aims of this study were to redesign temporary storage area for hazardous waste based on 5S (Seiri, Seiton, Seiso, Seiketsu, Shitsuke) and the regulation, Minister of Environment and Forestry No. 12/2020. The object of this study was temporary storage area for toxic and hazardous waste in PT. Famili Raya. The data used were current condition, actual dimensions of temporary storage area, dimensions of waste, input and output data, and dimensions of a forklift. The results obtained were the proposed layout using the 5S approach could be used to redesign the storage layout in the temporary storage area. Space utility could be reduced by 32,67%. The decrease in space utility did not reduce the maximum storage capacity for used batteries, used tubular lamp, used oil waste, and turpentine oil waste.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/39918
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/15964
2020-04-17T18:34:48Z
presipitasi:RSA
"171109 2017 eng "
2550-0023
1907-817X
dc
Revitalisasi Pengelolaan Bank Sampah Di Palabuhanratu
Samadikun, Budi Prasetyo
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Handayani, Dwi Siwi
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Laksana, Muhamad Permana
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Bank sampah di Kelurahan Palabuhanratu sudah berdiri sejak tahun 2010. Bank sampah ini adalah salah satu bank sampah diantara dua bank sampah lain, yang baru berdiri pada tahun 2016. Volume sampah pada tahun 2015 sebesar 134,89 m3 per hari, mencakup 89% wilayah Kelurahan Palabuhanratu ternyata masih belum optimal dalam pengolahannya, karena sampah yang direduksi masih sekitar 5% dari total timbulan sampah yang dikirim ke TPA Cimenteng yang berlokasi sekitar 70 km dari Kelurahan Palabuhanratu. Kinerja bank sampah eksisting masih kurang, karena satu bank sampah hanya mampu melayani satu RW dan belum dapat melayani satu kelurahan. Selain itu, pengolahan sampah organik untuk dijadikan kompos belum dilakukan secara serentak oleh seluruh masyarakat, karena pengetahuan masyarakat yang masih kurang. Tujuan penelitian adalah mengetahui kondisi eksisting pengelolaan sampah dan merumuskan upaya revitalisasi Bank Sampah eksisting sebagai pihak pendukung pengelolaan sampah di TPS Kelurahan Palabuhanratu. Metode penelitian menggunakan metode survei, dengan menggunakan kuesioner, wawancara mendalam, dan observasi. Teknik analisis menggunakan analisis kuantitatif dan analisis kualitatif. Hasil penelitian menunjukkan bahwa masyarakat yang melakukan pemilahan sampah dari sumber hanya penduduk RT 01 RW 33. Selain itu jumlah TPS di Kelurahan Palabuhanratu masih terbatas, sehingga membutuhkan tambahan 5 unit TPS yang terintegrasi dengan bank sampah di kelurahan ini.
Kata kunci: revitalisasi, bank sampah, Palabuhanratu
The waste bank in Palabuhanratu Village has been established since 2010. This waste bank is one of the waste bank among two other waste banks, newly established in 2016.
The volume of waste in 2015 is 134,89 m3 per day, covering 89% of Palabuhanratu Village area is still not optimal in its processing, because the reduced waste is still about 5% of the total waste generation delivered to the Cimenteng Final Diposal Site (FDS), which located about 70 km from Palabuhanratu Village. The existing waste bank’s performance is still very poor, because one waste bank can only serve one RW and can not serve the entire village.
In addition, the processing of organic waste to be compost has not been done simultaneously by the whole community, due to the lack of people's knowledge. The purpose of this research is to know the existing condition of waste management and to formulate the revitalization of existing waste bank. The research used survey research method by using questionaire, in depth interview, and observation. Analytical technique using quantitative and qualitative analysis. The findings shows that the residents of Palabuhanratu Village who often do waste sorting from the source only from the residents of RT 01 RW 33. In addition, the number of existing temporary disposal site (TDS) in Palabuhanratu Village is still lacking, so it requires addition up to 5 units that integrated with waste bank in this village.
Keywords: revitalization; waste bank, Palabuhanratu
Universitas Diponegoro
2017-11-09 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/15964
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 2 (2017): September 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/42978
2022-12-15T03:16:03Z
presipitasi:RSA
"220330 2022 eng "
2550-0023
1907-817X
dc
Study of Desiccation Crack Behavior of Fly Ash - Bentonite (FAB) Composite in Landfill Liner System
Yohana, Eflita
Diponegoro University
Syafrudin, Syafrudin
Universitas Diponegoro
Budihardjo, Mochamad Arief
Diponegoro University
Ramadan, Bimastyaji Surya
Universitas Diponegoro
Lantasi, Ayudya Izzati Dyah
Universitas Diponegoro
Muhammad, Fadel Iqbal
Universitas Diponegoro
Humaira, Natasya Ghinna
Universitas Diponegoro
Array
The addition of bentonite to fly ash can lower the permeability coefficient of the composite landfill liner. Also, the montmorillonite bentonite can bind quite a lot of water molecules during the hydration process. In this study, the effect of mixture, water content, and salinity on the desiccation cracking phenomenon in the bentonite - fly ash mixture as a landfill liner system was investigated by conducting tests such as desiccation test, water content test, and standard proctor and permeability test. The variation in bentonite levels: 0%, 15%, 20%,25% and 25% + 1 N NH4Cl solution. The result shows that the appropriate mixture is fly ash + 15% bentonite with permeability of 4,065 x 10-7. The mixture complies with local regulations where the permeability coefficient of the bottom layer of the landfill should be less than 10–6 cm/s and have a low cracking value (CIF). Furthermore, the addition of saline solution to the composite can rise the value of the optimum moisture content. However, saline conditions can decrease the value of CIF drastically
Universitas Diponegoro
2022-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/42978
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 1 (2022): March 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20779
2020-04-17T18:36:39Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
BIO-PESTISIDA BERBASIS EKSTRAK TEMBAKAU DARI LIMBAH PUNTUNG ROKOK UNTUK TANAMAN TOMAT (Lycopersicum esculentum)
Siswoyo, Eko
Jurusan Teknik Lingkungan, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia (UII), Jl. Kaliurang Km 14,5 Yogyakarta 55584 Indonesia
Masturah, Rahmah
Jurusan Teknik Lingkungan, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia (UII), Jl. Kaliurang Km 14,5 Yogyakarta 55584 Indonesiai
Fahmi, Nurul
Jurusan Teknik Lingkungan, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia (UII), Jl. Kaliurang Km 14,5 Yogyakarta 55584 Indonesia
Array
Keberadaan limbah puntung rokok belum dimanfaatkan dengan baik dan hingga saat ini hanya dibuang sebagai sampah. Padahal tembakau dari limbah puntung rokok ini mempunyai potensi untuk dijadikan bio-pestisida untuk kegiatan pertaian yang ramah lingkungan. Tujuan dari penelitian ini adalah untuk menganalisis kualitas dan efisiensi tembakau dari puntung rokok sebagai bio-pestisida, mengetahui residu pada tomat diukur dengan instrumen Kromatografi Spektrometer-Massa (GC-MS) dan mengetahui intensitas serangan hama melalui metode ekstraksi maserasi. Senyawa kimia diperoleh dengan membandingkan daerah puncak kromatogram untuk setiap sampel. Hasil penelitian menunjukkan bahwa senyawa Alkaloid dan Terpenoid sebagai bentuk senyawa kimia yang terkandung pada bio-pestisida. Residu biopestisida yang terdeteksi adalah asam heksadekanoat dan asam dodecanoik, kedua senyawa ini termasuk dalam asam lemak jenuh. Intensitas serangan hama pada tanaman tomat dengan penggunaan biopestisida pada tanaman yang terserang ulat adalah sebesar 21% termasuk dalam kategori sedang. Sedangkan untuk intensitas serangan hama pada tanaman tanpa penggunaan biopestisida adalah sebesar 69% dan termasuk dalam kategori serangan hama puso (paling berat). Hasil ini menunjukkan bahwa limbah puntung rokok mempunyai potensi yang cukup baik untuk dijadikan bio-pestisida menggantikan petisida yang ada di pasaran.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20779
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/48090
2023-01-04T09:30:50Z
presipitasi:RSA
"221130 2022 eng "
2550-0023
1907-817X
dc
Comparison between Calibration and Addition Method of Lead and Chromium Total Testing in Textile Industrial Wastewater using AAS
Sean, Ayunda
Institut Teknologi Nasional Bandung
Hartati, Etih
Institut Teknologi Nasional Bandung
Marganingrum, Dyah
National Research and Innovation Agency
Array
Most of the wastewater from the textile industry in Indonesia has a negative impact on the environment and society. The wastewater contains heavy metals such as lead (Pb) and total chromium (Cr-Tot) from the coloring process. Pb and Cr-Tot parameters testing usually use Atomic Absorption Spectrophotometer (AAS). The purpose of this study was to compare between the calibration and the addition method to test the metal parameters of Pb and Cr-Tot contained in wastewater of textile industry of PT. X. Calibration method is often use for heavy metal concentration test than addition method. However calibration method is not frequently used for low concentration while addition method can be used for that. The difference between two methods is in the procedure. The concentrations of Pb and Cr-Tot using calibration method were 0.058 mg/L and 0.018 mg/L, respectively. Meanwhile, the concentrations of Pb and Cr-Tot using the addition method were 1.1419 mg/L and 1.1036 mg/L, respectively. Based on this research, the addition method gives a relatively better value and fulfills the interval requirements in the AAS readings for low Pb metal concentrations.
Universitas Diponegoro
2022-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/48090
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 3 (2022): November 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/22082
2020-04-17T18:37:51Z
presipitasi:RSA
"190617 2019 eng "
2550-0023
1907-817X
dc
Biosorpsi Logam Berat Cu(II) Menggunakan Limbah Saccharomyces Cereviseae
Setiawan, Adhi
Politeknik Perkapalan Negeri Surabaya https://scholar.google.com/citations?user=z_XYZ3MAAAAJ&hl=en
Basyiruddin, Fariz
Politeknik Perkapalan Negeri Surabaya
Dermawan, Denny
Politeknik Perkapalan Negeri Surabaya
Array
Biosorpsi merupakan salah satu jenis bentuk pengolahan limbah logam berat dengan menggunakan mikroorganisme, seperti bakteri, alga dan ragi (yeast). Penelitian ini menggunakan ragi (yeast) dari industri bir. Proses preparasi biosorben meliputi pengendapkan, pengeringan, dan pengayakan untuk memperoleh ukuran homogen. Biosorben yang terbentuk kemudian dikontakkan dengan larutan Cu (II) dengan konsentrasi 25 mg/L dan diteliti pengaruh pH (3, 4, 5), waktu kontak (1, 2, 3 jam) dan berat biosorben (0,25, 0,5, 0,75 gr) terhadap kemampuan biosorben dalam menurunkan konsentrasi logam Cu. Selanjutnya pada persen removal tertinggi dilakukan regenerasi menggunakan HNO3. Konsentrasi Cu yang setelah biosorpsi diuji menggunakan spektrofotometer Uv-Vis. Hasil penelitian menunjukkan bahwa pada pH 5, waktu kontak 1 jam dan berat biosorben 0,75 gr memiliki persen removal yang tertinggi yaitu sebesar 55,36%. Biosorben yang telah diregenerasi mengalami penurunan persen removal logam Cu (II) dari 55,36% menjadi 48,2%.
Universitas Diponegoro
2019-06-17 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/22082
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 1 (2019): Maret 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/55179
2023-08-18T09:24:32Z
presipitasi:RSA
"230730 2023 eng "
2550-0023
1907-817X
dc
Examining the Water Quality Situation in Klampok River, Semarang through the Application of the NSF-WQI (National Sanitation Foundation – Water Quality Index) Model
Syafrudin, Syafrudin
Universitas Diponegoro
Sarminingsih, Anik
Universitas Diponegoro
Juliani, Henny
Universitas Diponegoro
Wahyu Sejati, Anang
Universitas Diponegoro
Surya Ramadan, Bimastyaji
Environmental Sustainability Research Group
Budihardjo, Mochamad Arief
Environmental Sustainability Research Group
Dwi Nugraha, Winardi
Universitas Diponegoro
Array
The Klampok River is one of the rivers that crosses the Bandungan, Bawen, Bergas and Pringapus Districts. The increase in the number of residents in the river basin which is not matched by the availability of land encourages the conversion of land functions that are not in accordance with their designation. The existence of the Klampok River as a water body receiving wastewater resulting from anthropogenic activities has caused the Klampok River to become polluted. Thus, it is important to study the water quality and water quality status of the Klampok River for nature conservation. This study aims to determine the water quality status of the Klampok River using the water quality index method, namely the National Sanitation Foundation – Water Quality Index (NSF-WQI) with reference to class II river water quality standards. NSF-WQI is a method that uses several specific parameters to determine river water quality.DO, fecal coliform, pH, BOD, nitrate, phosphate, temperature, turbidity, and total solids.The 2018 water quality index using the NSF-WQI method is in the range54.13 – 65.38with medium-good quality status. Meanwhile, the water quality index for 2019 using the NSF-WQI method is within the range35.47 – 66.60with moderate status, except for sampling point 6 which has bad status.
Universitas Diponegoro
2023-08-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/55179
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 2 (2023): July 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/26800
2020-08-31T06:24:24Z
presipitasi:RSA
"191130 2019 eng "
2550-0023
1907-817X
dc
Analysis of Willingness to Participate from the Coastal Communities in Waste Management (Case Study: Pulau Pari Village, Kepulauan Seribu District)
Chaerul, Mochammad
Institut Teknologi Bandung
Laksana, Winda
Institut Teknologi Bandung
Array
Nowdays, marine debris becomes a major concern globally from many parties. Predicted source contributes to marine debris is settlement located at the coast. While facing several constraints, a municipal solid waste (MSW) management developed by community and local authority, especially taking consideration to keep a tourist attractive. Often, MSW management was applied without any consideration to the willingness of the community as a waste generator. The paper aims to find the willingness to participate related to MSW management from community at the coast with a case study of Pulau Pari Village of Kepulauan Seribu Regency. There were 6 criteria developed in the study namely: community habits, willingness to participate, community identification, environmental concern, social norms, and community perceptions, with the assessment to each subcriteria using likert scale 1-5 from 27 respondents. Subsequently, subcriterion of the participation related to MSW management were preferably chosen by respondent from each criterion. For example, from criterion of community habits the two subcriterion were dominantly chosen namely: pariticipate to provide waste storage (21%) and waste collection and directly sold by themselves (20%). Result of the willingness to participate could be used to determine a system or technology related to MSW management so that it may more sustained, especially to reduce the quantity of waste dumped to the sea.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/26800
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/26800/77935
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/57732
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
The Effect of Composition, Pyrolysis Temperature and Adhesive Concentration on the Proximate Content and Calorific Value of Biobriquettes from Durian Skin, Corn husk and Fish Bones Waste
Novitrie, Nora Amelia
Politeknik Perkapalan Negeri Surabaya https://scholar.google.com/citations?user=zkRH9EgAAAAJ&hl=id&oi=ao
Setiani, Vivin
Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=tkFGxfEAAAAJ&hl=en https://orcid.org/0000-0001-6398-3997
Camalia, Aisyah Dinda
Politeknik Perkapalan Negeri Surabaya
Array
Briquettes are an alternative energy derived from biomass. Biomass material can be obtained from plantation waste such as durian peel, agricultural waste such as corn husk and waste from the fisheries sector such as fish bones. Waste of corn husks, durian peel and fish bones have the potential to become biomass material as an alternative energy. The aim of this research is to analyze the effect of variations in composition, pyrolysis temperature and adhesive concentration on the quality of biobriquettes and emissions resulting from the combustion process. The dried waste materials is then pyrolyzed for 4 hours at 350 ℃ and 500 ℃. Proximate testing was carried out to determine the quality of the biobriquettes. The parameters analyzed in this test include moisture content, ash content, volatile matter content, bound carbon content and heating value. The results of the study revealed that the best sample variations were found in briquettes with a composition of 50% durian peel [T1] [c2] : 50% corn husk with a pyrolysis temperature of 350℃ and an adhesive concentration of 7%. The level of CO emissions produced when burning briquettes is 1,700 mg/Nm3 and SO2 is 0.741 mg/Nm3.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/57732
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/57732/185001
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/29298
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Performance Evaluation of Cyclone Particulate Controller and Wet Scrubber Unit in Paper Mill 7/8 PT. Pura Nusapersada Kudus
Rahmawati, Fauziyah
Universitas Diponegoro
Samadikun, Budi Prasetyo
Universitas Diponegoro
Hadiwidodo, Mochtar
Universitas Diponegoro
Array
Kebutuhan yang semakin meningkat sejalan dengan tingginya permintaan pasar terhadap suatu produk. Salah satu produk yang banyak digunakan yaitu kertas. Salah satu industri kertas daur ulang adalah PT. Pura Nusapersada Unit Paper Mill 7/8 dimana proses produksinya menggunakan uap air dari boiler yang berbahan bakar batubara. Proses tersebut berpotensi menghasilkan ash yang dapat mencemari udara sehingga diperlukan alat pengendali pencemar udara seperti cyclone dan wet scrubber. Diperlukan evaluasi terhadap efisiensi cyclone dan wet scrubber dengan mengetahui spesifikasi dan prinsip kerja alat, emisi yang dihasilkan, efisiensi alat, faktor yang mempengaruhi, permasalahan, operasi, dan pemeliharaannya. Metode yang digunakan yaitu pengamatan secara langsung, wawancara, data berupa dokumen, referensi, dan laporan rutin. Cyclone yang digunakan berjenis multicyclone dan wet scrubber berjenis venturi scrubber. Dari perhitungan yang telah dilakukan, didapatkan efisiensi Boiler Hitachi 94,195% dan Boiler Hamada II 96,844%. Boiler tersebut menghasilkan emisi yang telah memenuhi baku mutu Peraturan Menteri Lingkungan Hidup Nomor 07 Tahun 2007. Perhitungan efisiensi sebaiknya setahun sekali agar kualitas alat terpantau dan tidak mencemari kualitas udara di sekitarnya.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/29298
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/32284
2020-12-17T04:40:30Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Impact Analysis in Addition of Amylase Enzyme and Cellulose Enzyme Mixture toward Biogas Production from Rice Husk Waste using Solid State Anaerobic Digestion (SS-AD) Method
Larasati, Dyanung
Universitas Diponegoro
Hardyanti, Nurandani
Universitas Diponegoro
Sumiyati, Sri
Universitas Diponegoro
Nugraha, Winardi Dwi
Universitas Diponegoro
Syafrudin, Syafrudin
Universitas Diponegoro
Array
Penelitian ini bertujuan untuk menganalisis pengaruh variasi konsentrasi enzim amilase dan selulase, terhadap laju produksi dan kualitas biogas yang dihasilkan pada produksi biogas dari limbah sekam padi. Sekam padi tersebut diberi pretreatment kimia dengan merendamnya ke dalam NaOH 6% selama 24 jam, kemudian dicuci dengan air agar pH menjadi netral dan dijemur hingga kering seperti semula lalu dimasukkan ke dalam reaktor yang telah disiapkan beserta enzim, rumen dan urea. Reaktor yang digunakan bervolume 200 ml dan berjumlah 18 buah dengan masing-masing variabel terdapat dua reaktor. Variasi konsentrasi enzim yang digunakan yaitu 9%, 12%, 15% dan 18%. Pengukuran biogas dilakukan tiap 2 hari sekali selama 60 hari. Hasil dari penelitian ini menunjukkan bahwa penambahan campuran enzim amilase dan selulase dapat meningkatkan yield biogas yang dihasilkan, karena yield yang dihasilkan oleh reaktor dengan penambahan enzim 9%, 12%, 15% dan 18% secara berturut-turut adalah 604 ml, 935 ml, 1041,5 ml dan 2922,5 ml. Sedangkan reaktor yang tidak diberi enzim hanya menghasilkan yield biogas sebesar 115 ml. Laju produksi tertinggi berada pada reaktor yang diberi campuran enzim 18% dengan konstanta laju produksi biogas (U) sebesar 5,39 ml/(grTS.hari), produksi biogas maksimum (A) sebesar 68,53 ml/grTS dan waktu minimum terbentuknya biogas (λ) sebesar 0,92 hari
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/32284
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/32284/103245
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34351
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Setiani, Vivin
Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=_hF5gzYAAAAJ&hl=en https://orcid.org/0000-0001-6398-3997
Priastuti, Ulvi
Yuniarta, Dwi Pradevi
Corn waste is a solid waste that is still limited in use. One of the efforts that can be made to increase the use-value of maize waste is to convert it into biochar. Corn cobs are a component of corn that can be processed into biochar and can improve soil quality. This study aims to analyze the ability of corn waste biochar (in terms of chemical content and gas emissions) in improving soil quality. Primary data were collected by measuring C element using gravimetric method, N element using kjeldahl method, P element using oslen method, K (NH4O AC pH 7), pH using potentiometric, and CO2 emissions from biochar. Biochar is made by burning corn cobs at 500 oC without oxygen for 2 hours. Chemical content measurement of corn cob biochar, known as biochar tongkol jagung (BTJ) and soil, was carried out for eight weeks. The chemical elements of the mixture of biochar and soil at week 8 include C-Organic (0.7%), Total N (0.1%), P2O5 (10.6 ppm), K2O (0.28 me), pH (6.19), and CO2 emissions (6.64 mg CO2/day).
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34351
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/34351/102395
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/34351/102396
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/56495
2023-08-18T09:24:32Z
presipitasi:RSA
"230730 2023 eng "
2550-0023
1907-817X
dc
Sustainable Waste Management Breakthrough: Transforming Plastic Waste into Eco-Friendly Briquette Charcoal
Agustine, Dine
University of Islam Syekh-Yusuf Tangerang
Amyranti, Mutia
University of Islam Syekh-Yusuf Tangerang https://orcid.org/0000-0003-1969-0040
Komalasari, Nia
University of Islam Syekh-Yusuf Tangerang
Rumiris Hutagalung, Ira
University of Islam Syekh-Yusuf Tangerang
Kurniasari, Ratih
University of Islam Syekh-Yusuf Tangerang
Array
Plastic waste has emerged as an important environmental concern. Among the various types of plastic waste, such as Polyethylene Terephthalate (PET) and Polypropylene (PP), these two contribute the most to the overall plastic waste problem need to be efficiently managed. The purpose of this research is to study the manufacture of briquettes from PET and PP plastic waste with the help of starch adhesive. This research is expected to reduce the negative impact of plastic waste. In this study, the data to be obtained were the calorific value of the briquettes, ash content, moisture content, volatile content and bound carbon content. The results show that the best raw material combination in terms of the calorific value of the resulting charcoal briquettes is the raw material mixture with the addition of PET. The results of the PET type plastic briquettes were superior with the results of the calorific value test of 10.129 cal/gram, the proximate test results of 3.11% ash content, 4.98% moisture content, 65.31% volatile matter content, and 78% bound carbon content 79%. While the PP type plastic briquettes obtained a calorific value test result of 9,949 cal/gram, the calorific value was lower than the PET type plastic briquettes.
Universitas Diponegoro
2023-08-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/56495
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 2 (2023): July 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/35079
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
Syafrudin, Syafrudin
Hadiwidodo, Mochtar
Wardhana, Irawan Wisnu
Wardani, Tika Ayu Kusuma
Arumdani, Indah Sekar
Sudarno, Sudarno
Hardyanti, Nurandani
Greywater is household waste sourced from kitchens and bathrooms, except for toilets. Around 58%-85% of greywater can be generated from the total volume of household wastewater per house. It is necessary to treat wastewater before it is discharged into water bodies to prevent the adverse effects of contaminants on the environment and human health while reducing the demand for clean water. However, due to environmentally friendly, socially sustainable, and economical treatment costs, considering that greywater is produced every day and continuously, Multi Soil Layering (MSL) technology can be an alternative to remove contaminants in water. Thus, this study aims to determine the migration of COD in greywater using MSL technology. Other parameters tested were pH and temperature by taking samples of wastewater in residential areas of Semarang City. In this study, there are two stages, namely the preliminary stage and the running stage. The MSL system will use three reactors with andosol soil, apus bamboo, and coconut shell activated charcoal as mixed soil blocks (SMB). Reactor A (activated charcoal and andosol soil), reactor B (bamboo apus and andosol soil), reactor C (andosol soil, bamboo apus, activated charcoal). The results of domestic wastewater treatment using the MSL method in each of the three reactors could remove COD by 75%, 74%, and 76%. Reactor C obtained the highest COD removal efficiency compared to other reactors.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/35079
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
ind
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/15915
2020-04-17T18:34:40Z
presipitasi:RSA
"171109 2017 eng "
2550-0023
1907-817X
dc
Pemanfaatan Kitosan dan Teknologi Plasma untuk Penyisihan COD, TSS, dan Warna pada Limbah Cair Industri Paper & Packaging
Saphira, Debby Bella
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Syakur, Abdul
Departemen Teknik Elektro, Fakultas Teknik, Universitas Diponegoro http://magister.elektro.undip.ac.id/dosen-elektro/
Purwono, Purwono
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Industri paper & packaging adalah industri yang menghasilkan limbah cukup banyak karena kegiatan produksi yang berlangsung terus-menerus. Salah satu limbah yang dihasilkan adalah limbah cair yang mengandung COD, TSS, dan warna yang tinggi dan berpotensi untuk mencemari lingkungan apabila tidak diolah. Pengolahan yang dilakukan adalah pretreatment koagulasi-flokulasi dan pengolahan selanjutnya dengan teknologi plasma tegangan tinggi. Hasil pengolahan menggunakan koagulasi-flokulasi menggunakan koagulan kitosan menunjukkan terjadinya penyisihan konsentrasi optimal pada dosis 40 mg/l dengan efisiensi penyisihan COD 81,35%, TSS 96,34%, dan warna 98,18%. Kemudian limbah diolah dengan teknologi plasma dengan tegangan tinggi 15 kV dan variasi waktu kontak 10, 20, 30, 40, 50 menit. Didapatkan hasil optimal pada waktu 50 menit pada penyisihan konsentrasi COD, TSS, maupun warna. Diketahui bahwa semakin lama waktu kontak limbah dengan plasma tegangan tinggi maka semakin banyak spesies aktif pendegradasi limbah seperti H•, OH•, dan H2O2 yang terbentuk sehingga pendegradasian limbah akan semakin lebih baik.
Kata kunci: COD, Koagulasi-Flokulasi, Limbah Industri Paper & Packaging, Teknologi Plasma, TSS, Warna.
Universitas Diponegoro
2017-11-09 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/15915
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 2 (2017): September 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/42964
2022-12-15T03:16:03Z
presipitasi:RSA
"220330 2022 eng "
2550-0023
1907-817X
dc
The Determinant of Environmental Disclosure in ASEAN Countries
Wahyuningrum, Indah Fajarini Sri
Universitas Negeri Semarang
Safitri, Lisdiana
Universitas Negeri Semarang
Oktavilia, Shanty
Universitas Negeri Semarang
Setyadharma, Andryan
Universitas Negeri Semarang
Array
The purpose of this study is to examine the effect of firm size, industry type, profitability, firm age, environmental performance, institutional ownership, and gender diversity on environmental disclosure. The quantity of environmental disclosure is measured using disclosure scoring by giving “1” for items disclosed and “0” for items that are not disclosed. The population used in this study are manufacturing companies listed on the Indonesia Stock Exchange (IDX) and Kuala Lumpur, Stock. Exchange (KLSE) in the year 2019. The sampling technique used was purposive sampling which resulted in 74 companies. The analytical technique used in this research is multiple linear regression analysis using IBM SPSS Statistics version 25. The results of this study indicate that company size, company age, and environmental performance have a significant positive effect on environmental disclosure. The type of industry, profitability, institutional ownership, and gender diversity does not affect environmental disclosure. Based on the study results, it can be concluded that companies that are large in size and mature in age and equipped with ownership of ISO 14001 certification can contribute to making more comprehensive environmental disclosures.
Universitas Diponegoro
2022-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/42964
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 1 (2022): March 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/18342
2020-04-17T18:33:38Z
presipitasi:RSA
"160929 2016 eng "
2550-0023
1907-817X
dc
PENERAPAN TEKNOLOGI BIODRYING DALAM PENGOLAHAN SAMPAH HIGH WATER CONTENT MENUJU ZERO LEACHATE
Purwono, Purwono
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Hadiwidodo, Mochtar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Rezagama, Arya
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Pada tahun 2025, Indonesia diperkirakan akan menghasilkan sampah sebanyak 130.000 ton/hari. Sebagian besar sampah masih menjadi sumber penyebab polusi dan berpotensi mengurangi sumber air bersih. Jumlah limbah makanan relatif tinggi (> 60%) dan lainnya merupakan sampah yang dapat didaur ulang, seperti plastik, kertas, gelas, dan logam. Tetapi limbah makanan tidak dapat dilakukan daur ulang maupun sortir karena mengandung kadar air sangat tinggi hingga 74,5%. Limbah ini sangat berpotensi menghasilkan pencemar berupa lindi (leachate). Biodrying pengolahan sampah diharapkan mampu mengurangi volume lindi. Penambahan aerasi pada proses biodrying hanya menghasilkan lindi sebesar 1.279,5 ml dengan debit 3 liter/menit sedangkan tanpa aerasi menghasilakn lindi lebih banyak sebesar 1.607,5 ml. Suhu kompos tertinggi terjadi pada hari kedua mencapai 34 oC. Setelah hari keenam semua reaktor menunjukkan grafik kenaikan dan penurunan suhu sampah yang realtif seragam. Nilai pH berkisaran antara 6,09-8,88 dan nilai COD akhir pada reaktor kontrol tanpa aerasi sebesar 14.116,67 mg/l sedangkan COD paling rendah sebesar 13.360 mg/l yang dihasilkan dari reaktor dengan debit 2 l/m. Tujuan mencapai zero lechate belum tercapai tetapi proses biodrying mampu mengurangi volume lindi yang dihasilkan.
Universitas Diponegoro
2016-10-29 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/18342
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 13, No 2 (2016): September 2016
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/46683
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
Environmental Performance with Firm Size as an Intervening Variable
Hidayah, Retnoningrum
Universitas Negeri Semarang
Wahyuningrum, Indah Fajarini Sri
Universitas Negeri Semarang
Suryandari, Dhini
Universitas Negeri Semarang
Suryarini, Trisni
Universitas Negeri Semarang
Yanto, Heri
Universitas Negeri Semarang
Dinassari, Rahayu
Universitas Negeri Semarang
Rahayu, Rita
Universitas Andalas
Array
Environmental performance is significant in today's era. However, the high operational activity of the company has harmed the environment. This study examines the type of industry (TI) and the audit committee (AC) on environmental performance (EP). In addition, this paper uses firm size (FS) as an intervention. The research uses 198 units of analysis. The results show that the audit committee and firm size affected environmental performance. The type of industry and audit committee affect the firm size. Furthermore, firm size can mediate the relationship of the audit committee to environmental performance. However, the type of industry does not affect environmental performance. Therefore, firm size cannot mediate the relationship between the type of industry and environmental performance. Therefore, the company has to enhance the audit committee's role. Furthermore, the government should enforce regulations related to environmental performance, especially Law No. 32 of 2009 concerning the Protection and Management of the Environment, that all forms of environmental pollution carried out by individuals, corporations or officials can be subject to criminal sanctions. This study has limitations, only focusing on companies listed in the PROPER ranking. Future research could use all companies in many sectors for better interpretation.
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/46683
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/22922
2020-04-17T18:38:29Z
presipitasi:RSA
"190617 2019 eng "
2550-0023
1907-817X
dc
Analisis Kuantitatif Sistem Manajemen Lingkungan Berdasarkan Klausul ISO 14001:2015
Ramadan, Bimastyaji Surya
Universitas Diponegoro http://bimastyaji.wordpress.com http://orcid.org/0000-0002-5194-0743
Hapsari, Santika Budi
Universitas Diponegoro
Pramesti, Ajeng Lhaksita
Universitas Diponegoro
Ikhlas, Nurani
Institut Teknologi Pembangunan Surabaya
Array
PT. X merupakan perusahaan yang bergerak dalam bidang pengelolaan dan pengolahan limbah, sehingga sistem manajemen lingkungan yang baik dan benar sangat diperlukan dalam proses produksinya. Dokumen ISO 14001:2015 menjadi acuan PT. X dalam melakukan sistem manajemen lingkungan. Sertifikasi Sistem Manajemen Lingkungan ISO 14001 : 2015 merupakan bukti bahwa PT.X telah secara aktif melakukan audit eksternal maupun internal dalam bentuk self assessment dengan acuan yang ada pada klausul ISO 14001 : 2015. Pada penelitian ini dilakukan analisis secara kuantitatif menggunakan panduan self assesment yang dikeluarkan oleh Global Environmental Management Initiative (GEMI). Checklist ini berisikan daftar persyaratan yang mengacu pada standar ISO 14001:2015, dan ditulis dalam format pertanyaan baku beserta skoring kuantitatif. Dari hasil analisa yang telah dilakukan, PT. X telah memenuhi prinsip ISO 14001:2015 yang dapat dilihat dengan adanya Standard Operating Procedure (SOP) yang berisi tata cara operasi, proses produksi dan pemeliharaan lingkungan, serta terdokumentasikannya kebijakan dan komitmen manajemen puncak tentang sistem manajemen lingkungan. Kebijakan dan komitmen lingkungan merupakan prinsip utama yang menjadi dasar untuk diterapkannya sistem manajemen lingkungan.
Universitas Diponegoro
2019-06-17 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/22922
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 1 (2019): Maret 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/50138
2023-04-09T04:36:46Z
presipitasi:RSA
"230330 2023 eng "
2550-0023
1907-817X
dc
Application of Free Water Surface Constructed Wetland for Reduction of Brantas River Pollutants
Masriyanto, Popi Wahyuni
Universitas Negeri Malang
Yulistyorini, Anie
Universitas Negeri Malang
Ariestadi, Dian
Universitas Negeri Malang
Array
Brantas River is a raw clean water sources that flow through Malang City. The Brantas River water is polluted due to discharging of untreated wastewater, causing a decrease in river water quality. According to these problems, exploring water resources through Brantas River water treatment is essential using Free Water Surface Constructed Wetland (FWSCW) which aims to analyze the performance and improve the water quality of the Brantas River using these wetlands. The research was conducted on a laboratory scale with control treatment and FWSCW with aquatic plants such as Pistia stratiotes, Echinodorus palaefolius, and Heliconia psittacorum. The results showed that pH and temperature were stable, with values between 7.63 to 8.53 and 23°C to 27°C. The removal efficiency of FWSCW and control in reducing turbidity was 99.53% and 98.55%, respectively, and TDS reduction was 0.56% and 2.84%, respectively, for control and FWSCW. The water quality has met the 2nd class of the water quality standards based on Government Regulation of the Republic of Indonesia No. 82 of 2001. At the same time, the efficiency of reducing BOD concentration was 89%. The results show that the FWSCW system can be used as a secondary treatment system to produce clean water.
Universitas Diponegoro
2023-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/50138
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 1 (2023): March 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/23731
2020-08-31T06:24:01Z
presipitasi:RSA
"191126 2019 eng "
2550-0023
1907-817X
dc
The Use of Nano-Bio Coagulant from Rice Snail (Pila Ampullacea) Shells to Reduce COD, Turbidity, and TSS of Pharmaceutical Industry Wastewater
Hadiwidodo, Mochtar
Universitas Diponegoro
Ainurrofiq, Mohammad Naffah
Universitas Diponegoro
Purwono, Purwono
IAIN Surakarta
Oktiawan, Wiharyanto
Universitas Diponegoro
Array
Salah satu industry farmasi di Semarang, Jawa Tengah menggunakan koagulan Poly Alumunium Chloride (PAC) untuk mengolah limbah cair. Penggunaan PAC atas dasar kelayakan biaya dan efektivitas pengolahan. Apabila ditinjau dari aspek lingkungan, penggunaan koagulan sintetik dalam jumlah besar akan menimbulkan limbah lumpur yang sulit didegradasi, dan mampu mengubah tingkat keasaman air dan tanah disekitarnya, sehingga berdampak buruk bagi lingkungan. Pada penelitian ini kitosan digunakan sebagai nano bio koagulan untuk mengolah limbah cair industri farmasi. Variasi dosis nano bio koagulan dan kecepatan pengadukan dilakukan untuk mengevaluasi efisiensi penyisihan parameter Chemical Oxygen Demand (COD), kekeruhan, dan Total Suspended Solid (TSS), limbah. Nani bio koagulan dibuat dari Cangkang keong Sawah (Pila Ampullacea) dan ukuran biokoagulan dibuat skala nano partikel dengan harapan mampu meningkatkan efektifitas penyisihan. Metode persiapan berupa deproteinasi, demineralisasi dan deasetilasi. Proses nano partikel menggunakan alat HEM, ukuran partikel diuji menggunakan SEM dan uji gugus fungsi menggunakan FTIR. Hasil penelitian menunjukkan bahwa kitosan memiliki warna coklat abu-abu, ukuran partikel serbuk nano, kadar air 5,34 %, kadar abu 1,14 % dan derajat deasetil 25,27 %. Efisiensi penyisihan TSS yang tinggi sebesar 55,19 %, kekeruhan 64,73 % dan COD 55,63 %. Dosis yang optimum sebesar 200 mg/L dengan kecepatan pengadukan cepat 150 rpm. Nano biokoagulan kitosan paling efektif untuk menyisihkan kekeruhan dibandingkan dengan COD dan TSS limbah cair indutri farmasi.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/23731
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/24672
2020-08-31T05:28:29Z
presipitasi:RSA
"200331 2020 eng "
2550-0023
1907-817X
dc
Effect of Variations on the Type and Size of Organic Waste on Compost Water Content and Growth of Chili Plant
Novita, Elida
Universitas Jember
Andriyani, Idah
Universitas Jember
Romadona, Zakina
Universitas Jember
Pradana, Hendra Andiananta
Universitas Jember https://orcid.org/0000-0001-9249-4121
Array
Organic waste is potential as a compost material. It was supported by the amount of nutrient content. The compost block is a technology for utilizing organic material as a plant nursery. The research objective was to examine the variants of type and size of organic matter effect on the water content in compost blocks and vegetative growth of chili plants. The materials type of compost block were coffee pulp, tobacco petiole, and rice husks. Size variations in compost block were 10, 40 and 80 mesh. Experimental design on the types and sizes of organic materials using a Completely Randomized Design. The experimental results show that the highest value of water content in compost block with the watering of the same volume amount 51.22 mL of water is coffee pulp material with a range value of 40 - 50%. Coffee pulp and rice husk as compost block material influenced the vegetative growth of chili plants. The statistical tests that show a significant effect on the type and size of organic waste material on the chili plant growth i.e height and leaf area plants. The results become a consideration for variation type and size of organic waste choice for compost block materials.
Universitas Diponegoro
2020-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24672
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 1 (2020): Maret 2020
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/24672/81199
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/27834
2020-12-17T04:32:40Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Mapping of Sub-Optimal Land Based on NDVI Sentinel 2a Value: Preliminary Study
Indarto, Indarto
Universitas Jember http://orcid.org/0000-0001-6319-6731 http://orcid.org/0000-0001-6319-6731
Nadzirah, Rufiani
Universitas Jember
Reksa Belagama, Hadrian
Universitas Jember
Array
Normalized Difference Vegetation Index (NDVI) merupakan salah satu indeks vegetasi yang digunakan untuk menganalisis kerapatan vegetasi. Penelitian ini menyajikan potensi aplikasi NDVI untuk memetakan Lahan Sub-Optimal kering (LSO-kering). Penelitian dilakukan di bagian timur wilayah Kabupaten Situbondo yang mencakup tiga kecamatan, yaitu, Arjasa, Asembagus dan Jangkar. Citra Sentinel 2A rekaman tahun 2018 yang sudah terkoreksi dan 450 training area atau GCP (Ground Control Point) digunakan sebagai input utama. Wilayah tersebut merupakan daerah dengan karakteristik iklim yang khas, dimana musim kemarau lebih lama dibanding dengan musim penghujan. Analisis menggunakan tool "plug-in SNAP" dan "QGIS". Prosedur penelitian mencakup: (1) inventarisasi data, (2) pra-processing data, (3) processing data dan (4) uji akurasi. Klasifikasi NDVI dapat membedakan 6 kelas peruntukan yaitu : badan air, area pemukiman, LSO-kering, tegalan-sawah tadah hujan, sawah irigasi, hutan-perkebunan. Klasifikasi NDVI menghasilkan nilai Overall dan Kappa akurasi sebesar 66,9% dan 61,6%. Nilai akurasi yang didapat masih jauh dari standar klasifikasi, namun metode ini dapat menjadi pijakan penelitian selanjutnya terkait dengan indek citra yang dapat digunakan untuk identifikasi LSO-Kering.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/27834
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34453
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Pratiwi, Amanda Hesti
Budiyono, Budiyono
Dewanti, Nikie Astorina Yunita
Beach waste pollution can have an impact on human health in these areas. Beach waste data is needed to determine the solution for preventing beach/marine pollution. This study aims to estimate beach waste density, identify types of beach waste and factors of beach waste distribution in Semarang. The method used was descriptive observational with a cross-sectional research design. The sample was determined by purposive sampling and available 7 points of beach spread over four districts at Semarang. Beach waste samples took at each beach along 100m the width adjusts to the beach's width. The highest beach waste was found on Baruna Beach (North Semarang), with a total of 3,243 waste (227.4 kg). Moreover, the lowest beach waste was found on Mangkang Kulon (Tugu), with a total of 711 pieces of waste (63kg). From the 7 sample points of the beach, the average density of waste is 5.3 kg/m². Most waste types are plastics and woods. The different levels of waste on the beach area due to wind patterns and tidal conditions. This study's conclusion is the dominant factors of the beach waste levels are the pattern of wind, seawater currents, and density of river flow waste, while population density and urban economic growth affect the level of the city solid waste.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34453
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/37144
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
The Effect of Household Waste Reduction on the Lifespan of Parit Enam Landfill in Pangkalpinang City: Using Dynamic System Modeling
Fitriansyah, Hadi
Universitas Diponegoro
Maryono, Maryono
Universitas Diponegoro
Array
Currently, there are still problems occurring in waste management activities in Pangkalpinang City. Solid waste that is scattered in the City of Pangkalpinang is caused by waste that has not been transported and handled. TPA Parit Enam's capacity, which serves solid waste in Pangkalpinang City, will decrease every year due to an overload of incoming waste generation. Currently, the City of Pangkalpinang aggressively implements a waste management policy at the source or the 3R program, including waste bank activities and waste processing at reduce, reuse and recycle (3R) landfills. The purpose of this study was to determine the effect of household waste reduction activities on the current use of the Parit Enam landfill in Pangkalpinang City in each of the scenarios that were compiled. The compilation model uses Powersim Studio 2005. The dynamic analysis shows that the activities that follow the waste at the source and respect what happens in TPS 3R Pangkalpinang City can affect TPA Parit Enam's useful life and produce a suitable scenario to be applied in the waste management activities of Pangkalpinang City. Scenario C (Optimistic), the valuable life of Parit Enam Landfillreaches 2023, and scenario C (Optimistic) can reduce the amount of waste transported by 29.65% compared to scenario A (Business as Usual). Besides, the proportion of household waste reduction reached 48% at the end of the simulation year.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/37144
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14715
2020-04-17T18:33:53Z
presipitasi:RSA
"170515 2017 eng "
2550-0023
1907-817X
dc
APLIKASI GEOSPASIAL MENGGUNAKAN ARCGIS 10.3 DALAM PEMBUATAN PETA DAYA HANTAR LISTRIK DI CEKUNGAN AIRTANAH SUMOWONO
Putranto, Thomas Triadi
Departemen Teknik Geologi, Fakultas Teknik, Universitas Diponegoro
Alexander, Kevin
Departemen Teknik Geologi, Fakultas Teknik, Universitas Diponegoro
Array
Air tanah sebagai air bersih merupakan salah satu kebutuhan primer manusia yang dimanfaatkan dalam berbagai kepentingan manusia serta untuk air minum. Airtanah memiliki kualitas dimana salah satu parameter fisiknya adalah daya hantar listrik (DHL). Dalam suatu Cekungan Airtanah (CAT), airtanah memiliki keberagaman nilai daya hantar listrik yang dipengaruhi oleh faktor infiltrasi dan lingkungan. Nilai DHL dapat dijadikan suatu acuan mengenai kelayakan suatu airtanah sebagai air minum. Sebagai salah satu sumber yang paling diminati masyarakat, maka masyarakat juga perlu untuk mengetahui kualitas dari airtanah tersebut melalui parameter daya hantar listrik sehingga peta daya hantar listrik daerah CAT Sumowono dapat menjadi suatu informasi bagi masyarakat yang menggunakan airtanah dari CAT Sumowono tersebut. Maka dari itu perlu adanya pembuatan peta daya hantar listrik daerah CAT Sumowono agar masyarakat merasa nyaman dan aman dalam memanfaatkan airtanah. Metode interpolasi data DHL menggunakan analisis geostatistik yang terdapat pada perangkat lunak ArcGIS 10.3. Metode interpolasi yang digunakan adalah Inverse Distance Weighting (IDW), Radial Basis Functions (RBF) dan Empirical Bayesian Kriging (EBK). Dari keseluruhan data yang terinterpolasi, didapatkan dua kelas kualitas airtanah berdasarkan nilai DHL, yaitu Sangat Baik (<250 μS/cm) dan Baik (250-750 μS/cm). Metode interpolasi yang dinilai paling seimbang adalah metode RBF. Melalui peta DHL hasil interpolasi metode RBF diketahui persebaran daerah dengan kelas sangat baik pada daerah CAT Sumowono mencakup 52,8% dari luas CAT dan 47,2% masuk ke dalam kelas baik.
Universitas Diponegoro
2017-05-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/14715
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 1 (2017): Maret 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/41986
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
Optimization of Enzymatic Bioremediation of Oil Contaminated Soil by Laccase from Marasmiellus palmovorus using Response Surface Methodology
Effendi, Agus Jatnika
Institut Teknologi Bandung https://orcid.org/0000-0002-3252-1156
Suhardi, Sri Harjati
Institut Teknologi Bandung
Arun Surya Widi, Yollanda Chekti Kirana
Institut Teknologi Bandung
Hasan, Khomaini
Institut Teknologi Bandung
Universitas Jenderal Achmad Yani
Awfa, Dion
Institut Teknologi Sumatera
Saputra, Rendana
Institut Teknologi Bandung
Array
Crude oil contamination is considered highly toxic and poses a significant environmental problem. As an alternative, the laccase enzyme showed high performance for removing various toxic contaminants, particularly oil-contaminated soil (i.e., total petroleum hydrocarbon). However, previous studies mainly tested the performance of laccase under irrelevant environmental conditions (i.e., artificially contaminated soil) with a limited number of soil samples, which can lead to bias optimization results for assessing laccase performance. Two types of natural oil-contaminated soils were tested under various reaction times and various concentrations of laccase extracted from Marasmiellus palmovorus. In addition, response surface methodology was used to find the maximum degradation of total petroleum hydrocarbon (TPH). The maximum degradation of TPH from soil A and soil B were 48.57% and 54.1%, respectively. Moreover, the performance of the laccase enzyme for oil recovery was also tested, with the percentage of oil recovery being 9.89% and 10.1 % for soil A and soil B, respectively. SARA fraction analysis indicated that laccase enzyme preferentially degraded highly polar SARA fraction (i.e., asphaltene and resin). In general, the application of laccase for the enzymatic remediation of oil-contaminated soils was practical. Hence, the use of laccase for environmental application is still promising.
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/41986
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/17633
2020-04-17T18:35:44Z
presipitasi:RSA
"180329 2018 eng "
2550-0023
1907-817X
dc
Studi Komparasi Kelayakan Teknis dan Lingkungan Pemanfaatan Limbah B3 Sandblasting terhadap Limbah B3 Sandblasting dan Fly Ash sebagai Campuran Beton
Dermawan, Denny
Program Studi Teknik Pengolahan Limbah, Politeknik Perkapalan Negeri Surabaya http://www.sinta.ristekdikti.go.id/authors/detail?id=5978188&view=overview
Ashari, Mochammad Luqman
Program Studi Teknik Pengolahan Limbah, Politeknik Perkapalan Negeri Surabaya
Array
Fly ash and sandblasting slag widely used as concrete’s builder because it contains quite high silica (SiO2) approximately 58,20% and 98,97%. Fly ash and sandblasting slag can increase concrete power pressure and contains characteristic like cement. Method of concrete making and technical feasibility test on this research use SNI standar (SNI 03-2834-2000). Environmental feasibility test use Toxicity Characteristic Leaching Procedur (TCLP) according PP No. 101 tahun 2014. The results of this research show that the use of sandblasting slag can increase concrete power pressure at age of immersion 28 days. Concrete power pressure with 5%; 10%; 15%; and 20% sandblasting slag are 16,32 MPa; 17,81 MPa; 18,89 MPa; and 15,24 MPa. The use of sandblasting slag and fly ash can increase concrete power pressure at age of immersion 28 days. Concrete power pressure with 5% sandblasting slag and 30% fly ash; 10% sandblasting and 25% fly ash, 15% sandblasting and 20% fly ash, and 20% sandblasting and 15% fly ash are 18,53 Mpa, 16,08 MPa, 17,20 Mpa, and 15,91 MPa. Based on the TCLP test, the concentration of heavy metal substances in 10% SBE are below the standard. Thus, it is scientifically proven to conclude that concrete with 10% and 15% sandblasting slag and 5% sandblasting slag and 30% fly ash; 15% sandblasting and 20% fly ash are technically proper and safe for the environment.
Universitas Diponegoro
2018-03-29 12:24:08
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/17633
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 1 (2018): Maret 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/46222
2023-03-30T04:11:54Z
presipitasi:RSA
"220706 2022 eng "
2550-0023
1907-817X
dc
Analysis of Potential RDF Resources from MSW Landfills in Major Cities of Indonesia
Susilo, Andre
Universitas Indonesia
M. Hartono, Djoko
Universitas Indonesia https://scholar.google.co.id/citations?user=b6zeOkwAAAAJ&hl=id&oi=ao
Angga Kusuma, Muhammad
Perusahaan Indocement Tunggal Prakarsa
Wulandari, Dwica
Universitas Indonesia
Array
Many Indonesian landfills include the waste that has the potential to be used as an alternative fuel in the cement industry. It is converted into RDF to enable cement manufacturers to use waste. The research was conducted to know the Municipal Solid Waste (MSW) potential of 3 landfills (Bantargebang, Sumur Batu, and Cipayung) as a renewable fuel. Before processing, MSW is characterised because there are quality standards that the waste must meet before being used as fuel. That is a quantitative study combining a literature review and laboratory test methods. The parameters that have been measured from the three sample sites were water content, ash content, volatile level, and calorific value. The results showed that the total energy value acquired from Refuse Derived Fuel (RDF) resources of Bantargebang, Sumur Batu, and Cipayung landfills was 2742.14, 2741.24, and 2671.32 kcal/kg, respectively. In addition, based on the water content at the three sample locations, only rubber samples qualified for RDF processing. In contrast, rubber was the sole component that did not match the processing conditions to become RDF based on ash content. Furthermore, the volatile level of the three research sites meets the RDF standard.
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/46222
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/46222/145097
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20814
2020-04-17T18:37:09Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
PENGARUH PENDAMPINGAN MASYARAKAT DALAM INISIASI BANK SAMPAH SEBAGAI UPAYA MENGOPTIMALKAN PENGOLAHAN SAMPAH DI DESA TANJUNG KECAMATAN TIRTO KABUPATEN PEKALONGAN
Samadikun, Budi Prasetyo
)DepartemenTeknikLingkungan,Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Array
Perumahan Pensiunan ABRI (PEPABRI) sebagai salah satu kawasan perumahan yang berada di Desa Tanjung Kecamatan Tirto Kabupaten Pekalongan memiliki beberapa permasalahan dalam pengelolaan sampah, dikarenakan sistem yang terbentuk tidak berjalan dengan baik dan pengetahuan masyarakat yang masih rendah terhadap sampah. Tujuan dari paper ini adalah untuk mengetahui pengaruh pendampingan masyarakat terhadap tingkat pemahaman masyarakat tentang urgensi pengelolaan sampah rumah tangga sehingga sampah dapat lebih bernilai ekonomis dalam sebuah bank sampah. Metode pendampingan masyarakat dilakukan dalam tiga tahap: tahap awal (sosialisasi), tahap pelaksanaan, serta tahap akhir (monitoring dan evaluasi). Respon warga cukup positif terhadap kegiatan pendampingan masyarakat ini, sejak mulai tahap sosialisasi, sampai dengan tahap evaluasi, masyarakat mengikuti secara aktif dan sangat antusias. Hasil monitoring menunjukkan masyarakat berangsur-angsur mulai paham dan sadar tentang arti penting pengelolaan sampah, serta berpartisipasi penuh dalam pengelolaan bank sampah di desa ini, baik sebagai pengelola ataupun nasabah bank sampah.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20814
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20781
2018-10-24T15:09:10Z
presipitasi:RSA
oai:ojs.ejournal.undip.ac.id:article/24889
2020-04-17T18:39:22Z
presipitasi:RSA
"190731 2019 eng "
2550-0023
1907-817X
dc
Analisis Proximate Briket Tempurung Kelapa dan Ampas Tebu
Setiani, Vivin
Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=_hF5gzYAAAAJ&hl=en
Setiawan, Adhi
Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=z_XYZ3MAAAAJ&hl=en
Dhani, Mey Rohma
Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=9OnC4XEAAAAJ&hl=en
Maulidya, Risya Dwi
Politeknik Perkapalan Negeri Surabaya
Array
Fossil fuels are a non-renewable energy source and their existence will be depleted. An alternative is needed that can reduce fossil fuels by using biomass. Biomass waste in the form of bagasse and coconut shell can be used as an alternative fuel in the form of biobriquette. This study aims to analyze the quality value of briquettes from the proximate test of the composition of bagasse and coconut shell produced with briquette quality standards that refer to SNI 01-6235-2000 about wood charcoal briquettes. The variables in this study consisted of five variables. The variables in this study were mass ratio coconut shells to bagasse were 90%: 10%, 80%: 20%, 70%; 30%, 60%: 40% and 50%: 50% respectively. The results of the test of water content, ash content, and volatile matter of the best quality briquettes of five variables were 90% coconut shell and 10% bagasse.
Universitas Diponegoro
2019-07-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24889
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 2 (2019): Juli 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/54736
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
Advanced Treatment of Tofu Wastewater using Multilevel Filtration and TiO2 Photocatalysis as Promising Approach for Effective Wastewater Remediation
Adriansyah, Endi
Universitas Batanghari
Marhadi, Marhadi
Universitas Batanghari
Herawati, Peppy
Universitas Batanghari
Viareco, Hariestya
Universitas Jambi
Sufra, Rifqi
Institut Teknologi Sumatera (ITERA)
Emilia Agustina, Tuty
Universitas Sriwijaya
Array
Tofu production is known to generate large amounts of wastewater containing a variety of organic compounds, chemicals, and potentially hazardous substances. It is very important to apply proper treatment of harmful substances that impact this wastewater. The aim of this study is to explore advanced techniques for treating tofu wastewater by combining multilevel filtration and TiO2 photocatalysis methods. To evaluate the efficiency of the treatment process, influent and effluent parameters, including pH, total suspended solids (TSS), and chemical oxygen demand (COD), are carefully monitored and measured. The results clearly demonstrate the impressive removal efficiency achieved through the combined use of multilevel filtration and TiO2 photocatalysis in treating tofu wastewater. The treated wastewater showed a promising efficiency in pH (100%), a significant decrease in TSS (40%), and COD (72%). the final measurements of pH met the standards set by government regulations, indicating successful remediation of these specific parameters. Even though TSS and COD haven't met the standard limits, each of them shows a very promising efficiency improvement. Towards the end of this study, it is suggested that the combination of these methods holds promise for effectively remediating tofu wastewater.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/54736
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/57457
2024-03-13T06:10:11Z
presipitasi:RSA
"240331 2024 eng "
2550-0023
1907-817X
dc
Utilization of Sludge from Cow Dung Biogas as Additional Feed for Sangkuriang Catfish (Claries gariepinus)
Saputri, Dina Dyah
Universitas Pakuan
Wahyuni, Sri
SWEN Inovasi Transfer Corporate Office
Daani, Alfiia Rahma
Universitas Pakuan
Array
Catfish farming is often faced with the availability of feed which is relatively expensive, so it is necessary to find a solution to support the catfish farming business—provision of sufficient and good quality feed to support fish growth. This study aimed to determine the level of sludge suitable for use as additional feed. Observations were made using the experimental method with a Randomized Block Design (RBD) research design involving one control group and three treatment groups with three repetitions each. The parameters observed were length (p), width (l), and fish weight (b). The environmental parameters observed were water temperature and pH. The results showed that the best sludge presentation to be given as additional feed was in treatment 1 with an average weight between 71.33-73.75 grams, an average length ranging from 18.13 to 22.17 cm, and a width of 3.16. – 3.27 cm. Survival Rate is between 275-78%. Specific Growth Rate (SGR) 1%. Specific Weight Growth Rate (SWGR) is between 2-3%. Based on the results, this study recommends that in the use of biogas output sludge as pellets, it is necessary to improve the quality of feed by adding good nutritious ingredients for catfish.
Universitas Diponegoro
2023-11-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/57457
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Article in Press 2024
eng
Copyright (c) 2024 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/30907
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Carbon and Microbial Dynamics in Soil on Biochar Compost Plus Treatment
Purbalisa, Wahyu
Balai Penelitian Lingkungan Pertanian
Zulaehah, Ina
Balai Penelitian Lingkungan Pertanian
Paputri, Dolty Melyga W.
Balai Penelitian Lingkungan Pertanian
Wahyuni, Sri
Balai Penelitian Lingkungan Pertanian
Array
Karbon dan mikroba dalam tanah mengalami fluktuasi dari waktu ke waktu disebabkan oleh berbagai hal. Penelitian ini bertujuan untuk mengetahui dinamika karbon dan mikroba dalam tanah pada perlakuan biochar-kompos plus. “Plus” disini mewakili penggunaan biochar-kompos dengan nano biochar dan adanya pengayaan terhadap mikroba konsorsia. Penelitian dilakukan di rumah kasa menggunakan rancangan acak lengkap dengan 3 ulangan dengan perlakuan sebagai berikut : kontrol/tanpa pupuk organik (P0), kompos (P1), biochar-kompos 1:4 (P2), nano biochar-kompos 1 : 4 (P3), nano biochar-kompos + mikroba konsorsia (P4), kompos + mikroba konsorsia (P5) dan biochar-kompos + mikroba konsorsia (P6) dengan dosis masing-masing 2,5 ton/ha. Biochar berasal dari tongkol jagung. Aplikasi biochar kompos plus dilakukan sebelum tanam. Parameter yang diamati yaitu karbon tanah (C-organik), dan kemasaman tanah (pH) pada 7 HSA, 37 HSA dan setelah panen serta total populasi mikroba tanah pada 2 HSA dan setelah panen. Karbon tanah diukur menggunakan metode Walkey and Black diukur dengan spektrofotometer, pH tanah menggunakan rasio tanah : air = 1 : 5 dan diukur dengan pH-meter, total populasi mikroba menggunakan metode Total Plate Counting (TPC). Hasil penelitian menunjukkan karbon dan populasi mikroba tanah mengalami penurunan dari waktu ke waktu, kecuali untuk populasi mikroba pada perlakuan kompos tunggal.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/30907
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/33840
2020-12-17T04:33:07Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Determination of Sustainable Domestic Waste Management System in densely populated areas along the Ciliwung River (Case Study: Cililitan Village)
Paramita, Nadia
Universitas Binawan
Ningrum, Sari Sekar
Universitas Binawan
Array
Sungai Ciliwung merupakan salah satu sungai utama yang mengalir di wilayah DKI Jakarta. Daerah Airan Sungai (DAS) Ciliwung memiliki luas area sebesar 370,8 km2, dengan panjang 124,1 km. Sungai Ciliwung berkontribusi besar terhadap masyarakat di tiga kota besar yaitu Bogor, Depok dan Jakarta sebagai sumber air minum, sumber air baku dan sumber air untuk irigasi. Kondisi air limbah rumah tangga saat ini masih dibuang secara langsung maupun tidak langsung ke badan air sungai. Grey water langsung dibuang ke badan air tanpa diolah. Black water diolah ke septic tank yang belum memadai ataupun langsung dibuang ke badan air. Kondisi ini tentunya memerlukan solusi dan penanganan yang cepat dan tepat. Dalam hal pengelolaan air limbah domestik baik grey water maupun black water, Kelurahan Cililitan belum termasuk dalam wilayah yang terakses perpipaan air limbah terpusat atau off site system dan tidak memiliki lahan yang dapat digunakan untuk membuat pengolahan limbah sistem komunal sehingga kebanyakan dari rumah tangga masih membuang langsung ke sungai atau memakai tangki septik tanpa penyedotan berkala. Tujuan dari penelitian ini adalah untuk mengidentifikasi kondisi pengelolaan limbah yang ada saat ini di Kelurahan Cililitan dan memberikan rekomendasi terhadap pemilihan sistem pengelolaan limbah domestik berkelanjutan yang dapat diterima oleh masyarakan dan aman bagi lingkungan.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/33840
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/36179
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Optimization of Fermentable Sugar Production from Pineapple Leaf Waste (Ananas comosus [L.] Merr) by Enzymatic Hydrolysis
Widihastuty, Yohanita Restu
Universitas Sebelas Maret
Sutini, Sutini
Universitas Sebelas Maret
Ramadhani, Aida Nur
Universitas Sebelas Maret
Array
Pineapple leaf waste is one agricultural waste that has high cellulose content. Pineapple leaf waste's complex structure contains a bundle of packed fiber that makes it hard to remove lignin and hemicellulose structure, so challenging to produce reducing sugar. Dried pineapple leaf waste pretreated with a grinder to break its complex structure. Delignification process using 2% w/v NaOH solution at 87oC for 60 minutes has been carried out to remove lignin and hemicellulose structure so reducing sugar could be produced. Delignified pineapple leaf waste has been enzymatic hydrolyzed using cellulase enzyme (6 mL, 7 mL, and 8 mL) to produce reducing sugar. The sample was incubated in an incubator shaker at 155 rpm at 45, 55, and 60oC for 72 hours. Determination of reducing sugar yield had been carried out using the Dubois method and HPLC. The model indicated that the optimum operating condition of enzymatic hydrolysis is 7 mL of cellulase enzyme at 55oC to produce 96,673 mg/L reducing sugar. This result indicated that the enzymatic hydrolysis operating condition improved the reducing sugar yield from pineapple leaf waste. The optimum reducing sugar yield can produce biofuel by the saccharification process.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/36179
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/12486
2020-04-17T18:33:18Z
presipitasi:RSA
"161029 2016 eng "
2550-0023
1907-817X
dc
REVITALISASI SISTEM PENGELOLAAN SAMPAH TERPADU DI KELURAHAN PUDAKPAYUNG SEMARANG
Samadikun, Budi Prasetyo
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Hadiwidodo, Mochtar
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Jusihdani, Atiya Nurul
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Array
This study focused on the existing condition of waste management in Pudakpayung Village Semarang and revitalization efforts on the operational aspects, institutional, and community participation, due to the lack of optimization waste management process in the region. By using the survey method, it is known that the placing and sorting process in existing condition have individual place pattern but have not done the sorting activity which is not entirely discarded in
Waste Processing Unit Pudakpayung, with collecting periodization in 2 days and 3 times ritation. Waste Processing Unit Pudakpayung only serve 5 RW in the Pudakpayung Village, and partly Gedawang Village area.
Universitas Diponegoro
2016-10-29 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/12486
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 13, No 2 (2016): September 2016
eng
Copyright (c) 2016 Jurnal Presipitasi
oai:ojs.ejournal.undip.ac.id:article/38398
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
Using Kamishibai Media in Thematic Learning to Increase Students' Knowledge of Environmental Education
Rachman, Indriyani
The University of Kitakyushu
Rohmawatiningsih, Wati
SD Dayeuhkolot 07
Yayoi, Kodama
The University of Kitakyushu
Array
Global environmental damage emphasizes the importance of environmental education at schools. It is a tool for achieving sustainable development. Environmental education (EE) is integrated into several core subjects in the Indonesian primary school curriculum as a thematic learning. For the teachers, it is essential to be aware of planning and designing appropriate learning methods based on the physical, emotional, and cognitive stages primary students. Kamishibai seems suitable for EE learning at primary school. It can help students to understand EE content. The aim of this study was to analyze using Kamishibai in thematic learning to increase the students' knowledge of EE. The method used in this study was pre-experiment with the research design of the one-group pretest-posttest design. Nine 5th grade students participated in the study. To determine the students’ knowledge of EE, a test was administered before and after the Kamishibai implementation. As a result of the analysis, it was found that, after the implementation, the students’ knowledge of EE was higher than before implementation. The result also showed the students’ ability in retelling the story at the end of the Kamishibai implementation. These indicated that Kamishibai strengthened students' memory. In conclusion, Kamishibai increased students' knowledge of EE.
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/38398
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14829
2020-04-17T18:34:32Z
presipitasi:RSA
"171109 2017 eng "
2550-0023
1907-817X
dc
Cryptosporidium sebagai Indikator Biologi dan Indeks Nsf-Wqi untuk Mengevaluasi Kualitas Air (Studi Kasus: Hulu Sungai Citarum, Kabupaten Bandung)
Nufutomo, Tastaptyani Kurnia
Environmental Engineering Department, Institut Teknologi Sumatera
Muntalif, Barti Setiani
Teknik Lingkungan, Institut Teknologi Bandung https://www.itb.ac.id/staff/view/barti-setiani-muntalif-eqy
Array
Kualitas air yang menurun di Hulu Sungai Citarum dapat disebabkan oleh banyak faktor. Faktor-faktor tersebut dapat diketahui dari parameter fisika, kimia dan biologi. Parameter biologi yang digunakan untuk mengevaluasi kualitas air adalah mikroorganisme patogen yang menimbulkan penyakit di sistem pencernaan seperti diare akut, yaitu Coliform dan Cryptosporidium. Tujuan penelitian ini adalah untuk mengetahui status kualitas air di Hulu Sungai Citarum dengan indeks kualitas air NSF-WQI, mengetahui hubungan dan pengaruh parameter fisik dan kimia air terhadap parameter biologi, menentukan faktor utama dari parameter air yang paling berpengaruh dan mengetahui hubungan serta pengaruh faktor utama tersebut terhadap Cryptosporidium. Metode yang digunakan adalah mengambil sampel di tiap stasiun dengan composite, mengidentifikasi dan analisis Coliform dengan MPN dan identifikasi Crytosporidium dengan Ziehl Neelsen staining, kemudian menganalisis parameter kimia dan fisika dengan indeks NSF-WQI, lalu data tersebut diolah menggunakan metode statistik PCA. Hasil pengukuran kualitas air berdasarkan NSF-WQI adalah kualitas air di Hulu Sungai Citarum termasuk kategori buruk dan medium. Keberadaan Cryptosporidium di Hulu Sungai Citarum disebabkan oleh 2 (dua) faktor utama, yaitu faktor pertama terdiri dari DO, turbiditas, NO2, NH4 dan total Colifom, sedangkan faktor kedua terdiri dari TSS, COD dan PO4. Kedua faktor tersebut tidak signifikan dengan keberadaan Cryptosporidium di Hulu Sungai Citarum.
Kata kunci: Cryptosporidium, Hulu Sungai Citarum, Indeks NSF-WQI, Kualitas Air
Universitas Diponegoro
2017-11-09 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/14829
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 2 (2017): September 2017
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/14829/36920
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/42726
2022-12-15T03:16:03Z
presipitasi:RSA
"220330 2022 eng "
2550-0023
1907-817X
dc
Sustainability Indicator: An Initial Parameter for Convenience Product
Prabawani, Bulan
Universitas Diponegoro https://admbisnis.fisip.undip.ac.id/bulan-prabawani-2/#:~:text=Dr.%20Bulan%20Prabawani%20adalah%20Ketua,Social%20Responsibility%2C%20dan%20Green%20Business. http://orcid.org/0000-0001-7213-5770
Hadi, Sudharto Prawata
Universitas Diponegoro https://orcid.org/0000-0001-8781-6878
Array
The environmental awareness of consumer has been growing along with the increase of knowledge, education and access to information. The demand from the government, media, and community has also increasingly escalated the pressure to companies to produce environmentally friendly products. This eventually encourages greenwashing practices extensively which are unfavorable to consumers because the practice is frequently included as marketing scam. In addition, the existing environmentally-based certification is primarily oriented to the planet and profit aspects of the triple bottom lines and tends to ignore the community. Hence, this study reviews a variety of green-based certifications or sustainability indicators which has existed particularly in Indonesia and their potential for the development of convenience products, products which are consumed in high frequency since they are cheap and consumed daily. This research involves explorative analysis using open secondary data from public journalism, media releases, academic references, and official webpages. Furthermore, this research describes current green-based certifications and presents the initial concept of a sustainability indicator which involved the planet and humans concurrently as well as adopt Proper label as product labelling.
Universitas Diponegoro
2022-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/42726
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 1 (2022): March 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20790
2020-04-17T18:36:58Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
PENENTUAN VARIASI RASIO C/N OPTIMUM SAMPAH CAMPURAN (DEDAUNAN DAN SISA MAKANAN) TERHADAP KINERJA COMPOST SOLID PHASE MICROBIAL FUEL CELLS (CSMFC)
Lucitawati, Erika
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Rezagama, Arya
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Samudro, Ganjar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Array
Rasio C/N merupakan salah satu faktor penting pada proses pengomposan dan produksi listrik dalam compost solid phase microbial fuel cells (CSMFC). Rasio C/N menggambarkan nutrisi yang tersedia bagi mikroorganisme dalam CSMFC. Besarnya nilai rasio C/N yang terdapat dalam substrat yang digunakan mempengaruhi kinerja CSMFC. Penelitian ini bertujuan untuk menentukan nilai rasio C/N yang optimum terhadap kinerja CSMFC. Variasi nilai rasio C/N yang digunakan yaitu 30:1, 40:1 dan 50:1. Kadar air diatur pada 60 %. Penelitian dilakukan secara batch selama 23 hari. Parameter yang diujikan berupa suhu, pH, kadar C Organik, N total, P total, K total, rasio C/N, power density, dan Coulombic efficiency. Hasil penelitian menunjukkan bahwa kinerja CSMFC yang optimum terdapat dalam reaktor dengan rasio C/N 30:1 dengan nilai suhu, pH, kadar C Organik, N total, P total, K total, power density, dan Coulombic efficiency secara berturut-turut sebesar 7,1, 27,5 OC, 20,31%, 1,63%, 0,19%, 0,21%, 12,47, 48,02 mW/m2 dan 0,19%.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20790
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14717
2017-05-15T16:35:42Z
presipitasi:RSA
oai:ojs.ejournal.undip.ac.id:article/24779
2020-04-17T18:39:10Z
presipitasi:RSA
"190731 2019 eng "
2550-0023
1907-817X
dc
Desulfurisasi Batubara Menggunakan Larutan Ekstrak Belimbing Wuluh (Everrhoa Bilimbi L)
Amin, Muhammad
Balai Penelitian Teknologi Mineral, Lembaga Ilmu Pengetahuan Indonesia
Birawidha, David Candra
Balai Penelitian Teknologi Mineral, Lembaga Ilmu Pengetahuan Indonesia
Isnugroho, Kusno
Balai Penelitian Teknologi Mineral, Lembaga Ilmu Pengetahuan Indonesia
Hendronursito, Yusuf
Balai Penelitian Teknologi Mineral, Lembaga Ilmu Pengetahuan Indonesia
Muttaqqi, Muhammad Al
Balai Penelitian Teknologi Mineral, Lembaga Ilmu Pengetahuan Indonesia
Prilitasari, Nurbaiti Marsas
Balai Penelitian Teknologi Mineral, Lembaga Ilmu Pengetahuan Indonesia
Array
Desulphurization process can improve the quality of coal and reduce the environmental pollution. In this study, the method used for desulphurization process was a leaching method using wuluh starfruit extract as a leaching agent. Starfruit extract obtained by grinded, filtered and extracted the starfruit solution. Coal was crushed by using a grinding ball mill, sifted to obtain samples of 80 mesh, 120 mesh, and 150 mesh. Coal was added with starfruit extract, heated on a hotplate stirrer at a temperature of 110oC, 300 rpm of stirring speed and 3, 4 , 5 hours of leaching time. Leachate solution were analyzed using XRF test. The results of the study showed that 80, 120 and 150 mesh could produce 1.777%, 1.556% and 1.053% of sulfur, respectively. Maximum decrease of sulfur occurred in 150 mesh with 5 hours of leaching time which could reach 0.261% of concentration. Ash content also could decreased from 11.43% to 6.18% and fixed carbon content from 42.15% rose to 51.33%. The desulphurization process using starfruit extract was influenced by the grain size of the coal and the contact time of leaching. The finer the grain size of the coal and the longer the leach contact time, the smaller the sulfur content obtained in the coal after the desulfurization process was carried out
Universitas Diponegoro
2019-07-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24779
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 2 (2019): Juli 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/52395
2023-08-18T09:24:32Z
presipitasi:RSA
"230730 2023 eng "
2550-0023
1907-817X
dc
Determination of Optimum Conditions for Synthesis of Methyl Ester from Bleached Crude Palm Oil Using Sn-Zeolite and Red Mud Catalysts
Amelyanti, Esi
Universitas Tanjungpura
Usman, Thamrin
Universitas Tanjungpura
Rahmalia, Winda
Universitas Tanjungpura https://orcid.org/0000-0002-9904-3064
Array
Methyl esters synthesis from bleached crude palm oil (BCPO) containing 0.36 and 20.86% of free fatty acids using Sn-zeolite and red mud has been done. This study aims to determine the esterification, transesterification, and transesterification-esterification simultaneous reactions optimum conditions when using Sn-zeolite, red mud, and Sn-zeolite-red mud mixture catalysts. The X-ray diffraction and Fourier transform infrared analysis results show that Sn has been impregnated on zeolite, indicated by cassiterite and Sn-O-Sn vibrational peaks in Sn-zeolite. The main component of red mud is NaCO3, indicated by analcite and carbonate peaks. Thin-layer chromatography results in the transesterification showed that red mud catalyst could totally convert triglycerides from BCPO to methyl ester when 5% catalyst, 3 hours, and CPO:methanol mole ratio 1:20 were used. In esterification, Sn-zeolite can synthesize methyl ester from low-quality CPO when using CPO:methanol mole ratio 1:20 for 3 hours, however, the conversion was not total. In the transesterification-esterification simultaneous, the conversion was also not total which the best reaction conditions at mixing Sn-zeolite:red mud 1.5:1 (w/w), 7% catalyst, and CPO:methanol mole ratio 1:20 for 3 hours. This study shows that esterification and transesterification processes can be carried out simultaneously at a particular mass ratio of Sn-zeolite and red mud.
Universitas Diponegoro
2023-08-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/52395
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 2 (2023): July 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/26174
2020-08-31T06:24:14Z
presipitasi:RSA
"191130 2019 eng "
2550-0023
1907-817X
dc
Risk Analysis of Wosusokas Regional Water Supply System - PPP Project in Central Java Province - Government Perspective
Sutantiningrum, Kartika Hapsari
Universitas Selamat Sri
Utami, Sri Rejeki Laku
Universitas Selamat Sri
Array
Pada saat musim kemarau terjadi kelangkaan ketersediaan air bersih di beberapa Provinsi Jawa Tengah, termasuk kawasan Wosusokas (Kab. Wonogiri, Sukoharjo, Karanganyar, dan Kota Surakarta) sehingga pemerintah sering melakukan pengiriman air bersih. Untuk mengatasinya, Pemerintah mengadakan program Sistem Penyediaan Air Minum (SPAM) Regional Wosusokas. Skema pendanaan Kerjasama Pemerintah dan Badan Usaha (KPBU) menjadi opsi untuk mengatasi biaya investasi yang besar. Penelitian ini bertujuan untuk mengidentifikasi dan menganalisis risiko proyek KPBU SPAM Regional Wosusokas dengan perspektif pemerintah. Metode yang digunakan yaitu metode analisis studi kasus dan studi literatur. Responden yang terpilih berasal dari PDAB Tirta Utama, Dinas Bina Marga dan Cipta Karya Prov. Jawa Tengah, BPPW Prov. Jawa Tengah, Pemkab/pemkot (Perumda Air Minum, Bappeda dan DPU) dari Kab. Wonogiri, Kab. Sukoharjo, Kab. Karanganyar dan Kota Surakarta. Dari hasil penelitian, didapatkan35 faktor risiko yang berpotensi menyebabkan kegagalan atau keterlambatan proyek, dengan mayoritas tergolong risiko high (11,43%), moderate (54,29%) dan low (34,29%). Faktor risiko dengan probabilitas tinggi yaitu keterlambatan dan kenaikan biaya pembebasan lahan, kegagalan penyelesaian kontrak pekerjaan oleh kontraktor/sub kontraktor, kegagalan penetapan tarif awal, dan keterlambatan penyesuaian tarif periodik. Hasil penelitian ini dapat dijadikan acuan pemerintah dalam mengelola risiko proyek KPBU SPAM Regional khususnya di Provinsi Jawa Tengah
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/26174
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/26174/76255
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/26174/76256
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/58560
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
Analysis of Exhaust Gas Emission of Motor Vehicles with Variations of Fuel Types
Suryati, Isra
Universitas Sumatera Utara https://sinta.kemdikbud.go.id/authors/profile/5991144 https://orcid.org/0000-0003-1520-6493
Indrawan, Ivan
Universitas Sumatera Utara
Samuel Lubis, Jonathan
Universitas Sumatera Utara
Tanjung, Munir
Universitas Sumatera Utara
Setyowaty, Lies
Dinas Penanaman Modal dan Perlayanan Terpadu Satu Pintu (DPMPTSP)
Array
The discrepancy between the use of vehicle fuel types and the vehicle's technical specifications is expected to affect exhaust emissions. This study aims to examine the effect of using four types of fuel with different octane number specifications on two four-wheeled motor vehicles with an EFI fuel delivery system on exhaust gas emission parameters of carbon monoxide (CO), hydrocarbon (HC), carbon dioxide (CO2) and non-emitting gases Oxygen (O2). With a quantitative experimental approach method using the Automotive Emission Analyzer and simple linear regression analysis, the results showed that the use of variations with octane numbers RON 98, RON 92, RON 90, and RON 88 fuels at the same time as variations in engine speed (1000 – 3000) RPM showed an effect on concentration. HC and CO emissions decreased with each increase in the octane number of fuel, RON 92 fuel with the lowest average CO / HC (0.0013% / 0.46 ppm) and RON 98 with the lowest average CO / HC (0.0026% / 0 ppm). The use of RON 92 fuel is more effective and inexpensive to apply to vehicles with an EFI fuel delivery system (with compression of 1:10/10.2) compared to RON 98 fuel which emits higher CO and HC emissions at low engine speed (1000 -1500) RPM.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/58560
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/29259
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Identification and Information of Metals Control Technology at Organic Rice Development Locations in Batang Regency
Hindarwati, Yulis
Balai Pengkajian Teknologi Pertanian Jawa Tengah
Purbalisa, Wahyu
Balai Penelitian Lingkungan Pertanian
Sukarjo, Sukarjo
Balai Penelitian Lingkungan Pertanian
Array
Meningkatnya permintaan pasar akan konsumsi beras organik berkorelasi dengan peningkatan kawasan pengembangan padi organik. Identifikasi ini bertujuan untuk mengetahui kandungan logam berat sebelum pengembangan dilaksanakan dan alternatif teknologi dapat diterapkan. Survei dilakukan pada hamparan lahan berteras di kawasan pengembangan padi organik Jawa Tengah di Desa Getas, Kecamatan Bawang, Kabupaten Batang. Pengambilan sampel tanah pada hamparan berteras dibagi berdasarkan aliran air pengairan atau ketinggian tempat yaitu lahan sawah bagian : atas, atas-tengah, tengah, tengah-bawah, dan bawah. Contoh tanah diambil secara zig-zag pada kedalaman 0-20 dan 20-40 cm dimana masing-masing posisi diambil 8 titik tunggal dan dikompositkan. Contoh tanah diujikan untuk mengetahui kandungan logam berat Pb, Cd, dan Cu. Berdasarkan hasil pengujian terdapat logam pada hamparan di setiap bagian kedalaman. Pada kedalaman tanah 0-20 cm mengandung logam Pb, Cd dan Cu masing-masing sebesar 24,62; 1,70; 25,07 mg/kg, dan pada kedalaman tanah 20-40 cm mengandung 25,00; 1,72 dan 25,96 mg/kg. Batas kritis logam Pb, Cd dan Cu dalam tanah berturut-turut 100-400 ; 3,3 dan 50-140 mg/kg. Teknologi yang dapat diterapkan dalam meminimalisir logam berat dengan menambahkan bahan organik dan biochar kedalam tanah dan melakukan fitoremediasi menggunakan tanaman air pada pintu masuk air.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/29259
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/32356
2020-12-17T04:32:53Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Study of Environmental Carrying Capacity and Water Criticality Index Based on Availability Water in Balikpapan City
Harfadli, Muhammad Ma'arij
Institut Teknologi Kalimantan
Ulimaz, Mega
Institut Teknologi Kalimantan
Array
Salah satu isu prioritas Kota Balikpapan adalah keterbatasan ketersediaan air baku. Hal ini disebabkan pertumbuhan kegiatan domestik dan non domestik Kota Balikpapan begitu cepat sementara waduk Manggar sebagai sumber utama pemasok air bersih Kota Balikpapan hampir mendekati kapasitas maksimum. Sehingga perlu adanya prediksi ketersediaan air di Kota Balikpapan untuk mencapai titik kritis. Metode yang digunakan adalah menghitung kebutuhan dan ketersediaan air Kota Balikpapan selanjutnya menghitung nilai rasio ketersediaan dan kebutuhan air untuk mengetahui daya dukung lingkungan dan indeks kekritisan air di Kota Balikpapan. Hasil perhitungan status daya dukung lingkungan pada penelitian ini menunjukkan sumberdaya air di Kota Balikpapan tahun 2019 hingga 2029 bernilai antara 1-2 sehingga dapat dikatakan masuk dalam kategori aman bersyarat. Perhitungan indeks kekritisan air menunjukkan bahwa pada tahun 2019 dan 2024 Kota Balikpapan tergolong mendekati kritis (50-70%). Sedangkan pada tahun 2029 indek kekritisan air Kota Balikpapan mencapai status kritis (84%). Sehingga perlu adanya upaya konservasi sumberdaya air di Kota Balikpapan.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/32356
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34854
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Fitriana, Devi
Politeknik Negeri Cilacap
Sukmawati, Sukmawati
Rochman, Nur
Royani, Royani
Prasadi, Oto
Triwuri, Nurlinda Ayu
Fadlilah, Ilma
Heavy metals produced by the industrial sector in Cilacap will contaminate the waters and impact the organisms in them, which will affect the condition of humans as consumers. The purpose of the importance of this research activity is to compare the type of fish and the value of heavy metal Pb with the quality standards of the Ministry of Environment No.51 of 2004, BPOM Regulation 2009 and SNI 7387 of 2009, as well as knowing the maximum consumption limit of consumption fish catches to control the pattern eat fish indicated heavy metals. The method used is a comparative description with survey techniques in 3 locations where fish auctions (FAM) and Pb level analysis using the AAS method. The types of fish with the highest level of consumption in Cilacap are kembung, tuna and tongkol. The Pb level of kembung, tuna and tongkol passes the threshold> 0.4 ppm from SNI 7387-2009 and BPOM 2009, namely 0.7 ppm, 2.9 ppm, and 2.3 ppm, respectively so it is essential to have a consumption limit per week through Tolerable Maximum Intake (MTI) with categories for adults and children for the consumption of each type of fish consumption. Research shows that the maximum consumption limit for adults in kembung, tuna and tongkol is 16.9 kg, 2.8 kg, and 9.2 kg, respectively. Meanwhile, the maximum limit of consumption of kembung, tuna and tongkol for children is 6.4 kg, 1 kg, and 2.9 kg, respectively.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34854
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/56952
2023-08-18T09:24:32Z
presipitasi:RSA
"230730 2023 eng "
2550-0023
1907-817X
dc
Stakeholder Pressure and Its Effect on Sustainability Report
Wahyuningrum, Indah Fajarini Sri
Universitas Negeri Semarang
Ihlashul’amal, Muhammad
Universitas Negeri Semarang
Hidayah, Retnoningrum
Universitas Negeri Semarang
Widhi Rizkyana, Fitrarena
Universitas Negeri Semarang
Array
The quality of corporate sustainability reports in Indonesia is unfortunately found to be lacking, with a rating of only 53.6%. This is significantly lower compared to the average of other Southeast Asian countries. However, stakeholders are becoming more aware of their role in encouraging public companies to disclose sustainability information. This study intends to look at the quality of sustainability reports released by Indonesian public firms, as well as the impact of stakeholder pressure on these reports' quality. Data from annual and sustainability reports of businesses listed on the Indonesia Stock Exchange between 2016 and 2020 are used in the research, which is based on GRI's G4 guidelines and the GRI Standards 2016. The study looks at numerous stakeholder pressures, including pressure from creditors, media exposure, the Big Four accounting firms, employees, consumers, environmentally sensitive industries, and shareholders. The results show that companies with significant media coverage typically produce sustainability reports of high quality. However, pressure from other stakeholders has not been found to have a significant impact on the quality of these reports. This study provides valuable insights into the state of sustainability reporting in Indonesia and aims to encourage stakeholders to actively participate in promoting a sustainable industry.
Universitas Diponegoro
2023-08-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/56952
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 2 (2023): July 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/39265
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
Analysis of the Effect of HVAC System Modification towards Indoor Air Quality (IAQ) and Microbiological Growth at Accommodation and Office Buildings in an Oil and Gas Industry
Valentina, Sabrina
Universitas Indonesia
Nasri, Sjahrul Meizar
Universitas Indonesia
Herespatiagni, Rani
Universitas Indonesia
Array
Indoor Air Quality (IAQ) problems, such as high relative humidity and microbiological (bacteria and mold) growth in accommodation and office buildings, can cause health effects for the occupants. People commonly have activities inside the buildings all day long. This study aimed to determine the impact of HVAC systems on IAQ parameters and microbiological growth. The study was conducted in accommodation and office buildings that had been identified with IAQ problems. The research methodology used a quantitative cross-sectional study design with statistical comparison analysis and statistical correlation analysis. The statistic results showed that relative humidity (RH) significantly had a strong correlation (r=0.520, 95% CI) with mold growth in ambient air of accommodation; O2 had a significantly strong correlation (r=0.541, 95% CI) with bacteria growth in ambient air at the office; VOC (r=0.853, 95% CI) and CO2 (r=0.803, 95% CI) had a very strong correlation with mold growth at office surface area. High humidity contributed to risk on IAQ (OR=50, 95% CI). Significant improvement was shown in relative humidity at all buildings, especially at the office, but mold and bacteria growth were offered only at the accommodation. Therefore, a comprehensive evaluation was needed to improve the IAQ and modify the HVAC system.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/39265
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/16467
2020-04-17T18:35:13Z
presipitasi:RSA
"171109 2017 eng "
2550-0023
1907-817X
dc
Kemampuan Tanah Liat dengan Campuran Serbuk Gergaji sebagai Penahan Lindi di Tempat Pengolahan Akhir Sampah
Budihardjo, Mochamad Arief
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Tempat Pengolahan Akhir (TPA) Sampah dengan sistem lahan urug harus dilengkapi dengan lapisan semi kedap (liner) yang berfungsi sebagai penahan lindi agar tidak mencemari lingkungan sekitar TPA. Di Indonesia, TPA banyak menggunakan lapisan tanah liat yang dipadatkan sebagai liner. Salah satu jenis tanah liat yang digunakan sebagai liner adalah bentonit. Bentonit memiliki permeabilitas rendah sehingga dapat menahan lindi dengan baik. Namun bentonit juga memiliki nilai batas-batas atterberg yang cukup tinggi sehingga mudah mengembang dan menyusut yang dapat memicu terjadinya retakan yang berpotensi mengurangi kemampuan liner dalam menahan lindi. Pada penelitian ini, serbuk gergaji yang memiliki sifat menahan air di tambahkan sebagai campuran tanah liat dengan tujuan untuk melihat pengaruhnya terhadap karakteristik dari bentonit. Pengujian batas-batas atterberg seperti batas cair, batas plastis, pengembangan bebas dan permeabilitas dari bentonit dengan penambahan serbuk gergaji dilakukan untuk mengetahui pengaruh serbuk gergaji terhadap perilaku bentonit. Penambahan serbuk gergaji yang diuji pada studi ini adalah sebesar 2%, 3% dan 5% dari total berat kering. Hasil percobaan menunjukkan bahwa penambahan serbuk gergaji menurunkan batas cair, batas plastis dan pembengkakan bebas dari bentonit. Disisi lain, penambahan serbuk gergaji meningkatkan permeabilitas bentonit dari semula sebesar 1,24 x 10-11 m/detik menjadi 3,98 x 10-10 m/detik dengan penambahan serbuk gergaji sebesar 8%.
Universitas Diponegoro
2017-11-09 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/16467
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 2 (2017): September 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/41886
2022-12-15T03:16:03Z
presipitasi:RSA
"220330 2022 eng "
2550-0023
1907-817X
dc
Performance of Electrocoagulation Process for Microplastic Fibre Removal from Laundry Wastewater
Wulandari, Marita
Institut Teknologi Kalimantan https://sinta.ristekbrin.go.id/author/?mod=profile&p=stat
Setyorini, Intan Dwi Wahyu
Institut Teknologi Kalimantan
Handayani, Anggie Melinda
Institut Teknologi Kalimantan
Ariani, Ismi Khairunnissa
Institut Teknologi Kalimantan
Zulfikar, Ainun
Institut Teknologi Kalimantan
Array
Laundry wastewater contains not only detergent but also contains fabric fibres and threads. Microplastic fibres have been discovered as a potential source of microplastic fibres in synthetic clothing washed in the environment. To reduce microplastic concentration in wastewater, many approaches have been developed. Electrocoagulation is one of them. Using both synthetic microplastics and laundry wastewater samples, this study examined the performance of electrocoagulation methods to remove microplastics. The flocculation and deposition mechanisms remove microplastic fibre. This research was set up by using a reactor with a volume of 1 L, 60 V of voltage and 60 minutes of contact time. Electrical current of 5A and 10A was applied to remove microplastic fibres during electrocoagulation (EC). The removal efficiency of polyester fibre was 55-68 per cent for 60 minutes with a current of 5A and 42-85 per cent for 60 minutes with a current of 10A. Polyamide fibre removal efficiency in 60 minutes is 53 per cent to 74 per cent at 5A current and 57 per cent to 72 per cent at 10A current. According to this study, it can be concluded that EC can remove microplastic fibre from laundry effluent.
Universitas Diponegoro
2022-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/41886
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 1 (2022): March 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20776
2020-04-17T18:36:19Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
EVALUASI KINERJA INSTALASI PENGOLAHAN AIR MINUM (IPAM) KARANGPILANG I PDAM SURYA SEMBADA KOTA SURABAYA SECARA KUANTITATIF
Bhaskoro, R. Gagak Eko
Prodi Teknik Lingkungan , Akademi Teknik Tirta Wiyata Magelang, Jl. Duku I No. 54, Perum KORPRI-ABRI, Kota Magelang, 56115
Ramadhan, Tutut Eko
Prodi Teknik Lingkungan , Akademi Teknik Tirta Wiyata Magelang, Jl. Duku I No. 54, Perum KORPRI-ABRI, Kota Magelang, 56115
Array
IPAM Karangpilang I merupakan salah satu instalasi pengolahan air yang di miliki PDAM Kota Surabaya yang melayani kebutuhan air bersih di Kota Surabaya dengan kapasitas 1.450 L/det. Supaya IPAM tetap dapat beroperasi secara optimal, maka diperlukan evaluasi terhadap IPAM ini. Penelitian bertujuan untuk : 1) Mengukur kinerja tiap-tiap unit Instalasi Pengolahan Air Minum (IPAM) Karangpilang I Kota Surabaya; 2) Membandingkan kualitas air produksi yang dihasilkan oleh IPAM Karangpilang I dengan standar PERMENKES No.492 2010; 3) Menganalisa hasil evaluasi IPAM Karangpilang I. Evaluasi IPAM dilakukan dengan observasi, wawancara, studi literatur, praktik lapangan. Hasil yang diperoleh dari penelitian ini adalah Kinerja setiap unit operasi belum berjalan secara optimal, yaitu pada unit Koagulasi, Sedimentasi, Filtrasi. Kualitas air produksi IPAM Karangpilang I sesuai dengan dengan Permenkes No 492 tahun 2010 tentang Kualitas Air. Berdasarkan hasil evaluasi secara keseluruhan instalasi IPAM Karangpilang I pada saat eksisting sudah dapat mengolah air dengan baik sehingga air yang diolah dapat memenuhi baku mutu air.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20776
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/46834
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
Solid Medical Waste Management of Hazardous and Toxic at UNS Hospital Surakarta
Hawali Abdul Matin, Hashfi
Universitas Sebelas Maret
Purwono, Purwono
UIN Raden Mas Said Surakarta
Chalid Afif Alfajrin, Achmad
Institut Teknologi Sumatera
Hidayat Ramli Inaku, Awaluddin
Universitas Muhammadiyah
Array
In the era of the COVID-19 Pandemic, medical waste is increasing in various hospitals, including UNS Hospital. The variables studied in the hazardous and toxic solid medical waste flow treatment. Primary data was obtained from an analysis of waste amount in 2021 and interviews with incinerator managers. Secondary data in the form of waste types, impacts, and incinerator residue were obtained from the literature study. This research aims to identify solid medical waste management with hazardous and toxic materials compared with Regulation of Environment and Forestry Minister of Republic Indonesia 56/2015. After analysis, it was found that there is dangerous and harmful solid medical waste flow management, distinguished by type. Particular colored medical waste is managed by reducing, sorting, storing, transporting, and destroying. Destruction is conducted with an incinerator. Arah Environmental Indonesia Company operates infectious medical waste. The potential impact of that waste can attack health, damage the environment quality, increase the degradation that has occurred, and pose a threat to microplastic. Completing waste management is done by tightening hospital regulations to produce output according to quality standards, limiting hazardous and toxic waste use, and selecting the waste.
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/46834
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/22921
2020-04-17T18:38:19Z
presipitasi:RSA
"190617 2019 eng "
2550-0023
1907-817X
dc
Optimasi Sistem Pengangkutan Sampah Kecamatan Jati, Kabupaten Kudus, Jawa Tengah
Ramadan, Bimastyaji Surya
Universitas Diponegoro http://bimastyaji.wordpress.com http://orcid.org/0000-0002-5194-0743
Safitri, Rahayu Puji
Universitas Diponegoro
Cahyo, Mohammad Rafif Dwi
Universitas Diponegoro
Wibowo, Yudha Gusti
Universitas Jambi
Array
Pengangkutan sampah merupakan bagian dari kegiatan pengelolaan sampah yang berpengaruh pada biaya keseluruhan pengelolaan dimana anggaran pengangkutan sampah dapat mencapai 60% dari total seluruh biaya pengelolaan sampah. Tujuan dari penelitian ini adalah untuk mengoptimasi sistem manajemen pengangkutan sampah di Kecamatan Jati, Kabupaten Kudus yang dikelola oleh Dinas Perumahan, Kawasan Permukiman dan Lingkungan Hidup, Kabupaten Kudus. Optimasi dilakukan dengan membandingkan sistem manajemen pengangkutan sampah eksisting dengan merencanakan sistem baru yang dibuat dengan berpedoman pada Permen PU Nomor 3 Tahun 2013 tentang Penyelenggaraan Prasarana dan Sarana Persampahan dalam Penanganan Sampah Rumah Tangga dan Sampah Sejenis Sampah Rumah Tangga. Berdasarkan hasil penelitian yang telah dilakukan, sistem manajemen pengangkutan sampah Kecamatan Jati saat ini dapat dioptimasi pada teknik operasionalnya yang meliputi pemilihan pola yang efektif dan efisien, pembagian rute secara merata dan penyediaan sarana pengangkutan sampah yang baik. Dengan demikian, pemerintah daerah setempat dapat melakukan pelayanan pengangkutan sampah secara maksimal, menggunakan waktu kerja secara efektif, mengefisienkan sarana pengangkutan sampah serta dapat mengurangi anggaran manajemen sampah secara keseluruhan
Universitas Diponegoro
2019-06-17 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/22921
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 1 (2019): Maret 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/51162
2023-04-09T04:36:46Z
presipitasi:RSA
"230330 2023 eng "
2550-0023
1907-817X
dc
Optimizing Utilization of Hazardous Waste and Biomass as Solid Fuel for Co-Firing
Ahmad Fauzy, Fandy
Institut Teknologi Nasional
Hartati, Etih
Institut Teknologi Nasional
Marganingrum, Dyah
National Research and Innovation Agency (BRIN)
Array
Continuously high use of fossil fuels may lead scarcity of these energy sources in the future. Therefore, it is necessary to develop renewable energy to ensure its availability. One of the efforts in the development of renewable energy and the aims of this study is to examine the utilization Fly Ash (FA), Bottom Ash (BA) combined biomass sludge of Wastewater Treatment Plant (WWTP) and municipal solid waste) materials as an alternative energy source (briquette raw materials) for co-firing in textile industry boilers. Briquettes were made with a composition of 60% FABA and 40% biomass which were then varied in composition. The parameters measured were proximate, calorific value, and shatter index. The feasibility test of briquettes was carried out using a Tanner diagram, where all briquettes made can be burned as fuel. Optimum briquettes quality was measured based on the criteria according to the Minister of Environment and Forestry Regulation No. 06/2021. The results showed that the composition of three briquettes that had optimum quality and met the criteria were briquettes with composition 10%FA:50%BA:40%Biomass (variation of WWTP sludge and biomass) with a calorific value and sulfur content of 3,578 Kcal/kg and 0,70%; 3,890 Kcal/kg and 0,82%; and 3,864 Kcal/kg and 0,96%.
Universitas Diponegoro
2023-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/51162
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 1 (2023): March 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/25205
2020-08-31T06:24:06Z
presipitasi:RSA
"191130 2019 eng "
2550-0023
1907-817X
dc
Identification of Iron Oxides and Effects of Magnetic Materials Washing for Sand Iron Jomblom Beach Using Sonochemical Methods
Prasdiantika, Ricka
Universitas Pandanaran
Agustin, Niyar Candra
Universitas Pandanaran
Rohman, Abdul
Universitas Pandanaran
Array
This study aims to prepare iron sand, determine the type of iron oxide, and determine the effect of washing iron sand with sonochemical methods. Iron sand samples were obtained from Jomblom Beach, Kendal Regency. Iron sand was separated using an external magnet to obtain magnetic material. The magnetic material obtained was washed using distilled water manually stirred and using the sonochemical method. The material was dried at 80 °C. Material characterization was carried out using X-Ray Fluorescence (XRF) to determine the elements contained in iron sand, Fourier Transform Infrared (FT-IR) Spectrophotometer to identify functional groups in iron sand, X-Ray Diffraction (XRD) to find out the crystal size and crystallinity of iron sand, and the Transmission Electron microscope (TEM) to determine the morphology of iron sand. The characterization results showed that the iron sand of Jomblom Beach contained Fe (72.28%), Ti (7.89%), Al (7.00%), and Si (7.60%). The iron oxide contained in the Jomblom Beach iron sand was dominated by magnetite (Fe3O4). Washing iron sand magnetic material using the sonochemical method increased the composition of the element Fe, increased the crystallinity of the magnetic material, prevented aggregation, and reduced the crystal size of the magnetic material. Magnetic material which was washed using the sonochemical method produced 79.47% Fe element, crystallinity 74.94%, and crystal size 52.78 nm.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/25205
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
ind
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/55682
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
Water Demand Modeling using Machine Learning Method in Bandung City, Indonesia
Afiatun, Evi
Universitas Pasundan
Yustiani, Yonik Meilawati
Universitas Pasundan https://orcid.org/0000-0001-6963-0295
Tanra, Dennis Anugerah
Universitas Pasundan
Array
This research was conducted at Bandung City with the aim of building a model using machine learning methods so that it can estimated clean water demands in Bandung City, as well as knowing the external factors that are considered to affect the model. Machine learning is a part of Artificial Intelligence (AI) discipline. The modeling is carried out using independent variables in the form of climate parameters which are rainfall, rainy days, and humidity, as well as the dependent variable in the form of drinking water needs which are represented by raw water. Data collection is done through secondary data. The model was built by using the TPOT module, and produces the AdaBoost.R2 algorithm as the most optimal model, by using the model algorithm, the best sub-model is produced with the most influential external factors, namely rainy days and humidity which has an MAE of 326,077.70 and a MAPE of 4.75%. This model is compared with the ARIMA model which has an MAE of 330,672.088 and an MAPE of 5.07%.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/55682
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/26363
2020-08-31T05:28:29Z
presipitasi:RSA
"200331 2020 eng "
2550-0023
1907-817X
dc
Potential of Acid Mine Formation in PIT 3000, Toraja Block, PT Trubaindo Coal Mining Based on Geochemical and Mineralogical Characteristics Study of Overburden and Underburden Rocks
Winarno, Tri
Universitas Diponegoro
Ali, Rinal Khaidar
Universitas Diponegoro
Langit, Wesly Rambu
Universitas Diponegoro
Array
Penambangan batubara di Indonesia kebanyakan dilakukan dengan sistem tambang terbuka, yang menyebabkan batuan yang ada pada lokasi penambangan tersingkap ke permukaan, sehingga mudah bereaksi dengan udara dan air. Tingginya kandungan mineral sulfida seperti pirit dan markasit pada lokasi pertambangan batubara, berpotensi menghasilkan asam tambang. Air asam tambang dapat menyebabkan terjadinya pencemaran lingkungan yang menjadi ancaman bagi ekosistem air dan tanah dengan meningkatkan konsentrasi logam berat. Penelitian ini bertujuan untuk mengidentifikasi kandungan mineral pada lapisan batuan overburden dan untuk mendeterminasi jenis mineral sulfida pembentuk asam tambang. Metode yang digunakan adalah penyelidikan lapangan, analisis mineralogi, geokimia dan pengukuran stratigrafi terukur untuk mengevaluasi kandungan mineralogi dan karakteristik geokimia pada batuan overburden dan underburden lapisan batubara Pit 3000. Hasil penelitian menunjukkan bahwa batuan overburden tersusun oleh batulempung dengan ketebalan berkisar 1,60 m – 5,15 m, sedangkan batuan underburden dicirikan oleh litologi yang beragam seperti batulempung, batulanau dan batupasir dengan ketebalan berkisar 0,20 m – 4,50 m. Berdasarkan analisis geokimia pada 18 sampel batuan overburden, diketahui bahwa lapisan overburden memiliki karakteristik yang didominasi oleh batuan Non Acid Forming (NAF) dengan 83% NAF, 11% Potential Acid Forming (PAF) dan 6% uncertain. Karakteristik lapisan underburden didominasi oleh batuan PAF dengan 45% PAF, 19% NAF dan 36% uncertain.
Universitas Diponegoro
2020-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/26363
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 1 (2020): Maret 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/30977
2020-12-17T04:32:42Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Evaluation of Artificial Reservoir Management in Sleman Regency, Yogyakarta Special Region
Wilopo, Wahyu
Universitas Gadjah Mada http://orcid.org/0000-0001-6059-6318
Setiawan, Hendy
Universitas Gadjah Mada
Eka Putra, Doni Prakasa
Universitas Gadjah Mada
Array
Pemerintah Indonesia telah menggalakkan program pembangunan embung di seluruh Indonesia. Program ini bertujuan utama untuk mendukung irigasi pertanian khususnya pada musim kemarau. Pada implementasi pembangunan embung sering sekali dijumpai banyak kendala yang ditemukan sehingga tujuan utama dari program ini belum bisa tercapai secara maksimal. Penelitian ini bertujuan untuk mengevaluasi kondisi embung yang berada di Kabupaten Sleman, Daerah Istimewa Yogyakarta baik dari sisi kondisi fisik, kelembagaan maupun kendala di dalam pengelolaan. Penelitian dilakukan melalui survei langsung terhadap 9 embung dan wawancara baik kepada pengelola maupun warga sekitar embung. Hasil penelitian menunjukkan bahwa dua embung mengalami kerusakan bangunan, tiga embung belum memiliki pengelola, dan tiga embung belum berfungsi sesuai dengan tujuan pembangunan embung. Kendala yang sering dijumpai di dalam pengelolaan embung adalah belum adanya struktur pengelola embung yang jelas dan pengelola yang sudah ada belum berjalan efektif sehingga menyebabkan belum tersedianya aturan yang jelas dalam pemanfaatan air embung. Organisasi pengelola embung harus melibatkan masyarakat maupun pemerintah desa dimana embung tersebut berada dan juga masyarakat penerima manfaat irigasi pertanian untuk menjamin fungsi dan keberlanjutannya
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/30977
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34066
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Azmiyati, Uzlifatul
Program Studi Teknik Lingkungan, Universitas Nahdlatul Ulama NTB
Rancak, Gendewa Tunas
In this research, the problem formulation is based on the central issues in sustainable domestic waste management. In domestic waste management, information is needed regarding the existing volume and the projected volume of domestic waste in the next ten years. This study's objectives are (1) to determine the volume of domestic waste in Mataram, (2) to project the volume of domestic waste in the next ten years in the city of Mataram. Based on the data analysis results, it is found that the generation of domestic waste in Mataram City in units of weight is 0.4 kg/person/day, while the amount of domestic waste generation in Mataram City in volume units is 0.0020 m3/day. The composition of domestic waste in Mataram City is dominated by wet organic waste at 64%, followed by dry organic waste, non-medical hazardous waste, and plastic packaging, which have the same percentage, namely 6%. The type of waste with the least amount is metal and hazardous medical waste, only 1%. The projected population growth for the City of Mataram has increased with an average growth per year of 1.99%. An increase followed this in the projected waste generation. In 2020 the population is 496,401 people with a waste generation of 1,005 m3/year. Meanwhile, in 2029 the total population of 583,571 people will generate 1,182 m3/year of waste.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34066
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/34066/101549
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/55752
2024-03-27T04:28:42Z
presipitasi:RSA
"240331 2024 eng "
2550-0023
1907-817X
dc
Spatial Planning for Agricultural Development Based on Carrying Capacity of Ecosystem Services in The Melolo Transmigration Area, East Sumba
Rojikhah, Afifatur
Universitas Brawijaya https://orcid.org/0009-0009-8252-2649
Leksono, Amin Setyo
Universitas Brawijaya https://orcid.org/0000-0001-5002-0569
Rachmansyah, Arief
Universitas Brawijaya https://orcid.org/0000-0001-7036-6735
Array
Transmigration is one of the government programs that aim to create a new growth center by establishing an activity center through the development of basic business patterns. Development of the main business pattern is carried out through the management of land resources for agriculture. Improper management of land resources can lead to a decrease in environmental quality. Therefore, it is necessary to know the potential carrying capacity of ecosystem service to plan agricultural development. Parameters are used to analyze the carrying capacity of ecosystem services as provisioning based on environmental services for water and food provisioning. The environmental service assessment method for water and food provisioning is calculated using weighting and scoring. The total value of the carrying capacity of ecosystem services as provisioning is obtained from the calculation of the two parameters using the Simple Additive Weighting method. The results of the analysis show that the value of the carrying capacity of ecosystem service as provisioning is classified as very low. This indicates that the capability of the land for agricultural development is very low. Agricultural development requires conservation actions to increase the carrying capacity of ecosystem service. Recommendations for conservation actions are carried out through land use arrangements.
Universitas Diponegoro
2023-11-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/55752
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Article in Press 2024
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/55752/186599
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/55752/186600
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/55752/186602
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/55752/186603
Copyright (c) 2024 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14716
2020-04-17T18:34:00Z
presipitasi:RSA
"170515 2017 eng "
2550-0023
1907-817X
dc
KAJIAN KUALITAS AIR DAN SEDIMEN DASAR SUNGAI KUTAI LAMA-KAB. KUTAI KARTANEGARA SEBAGAI PERTIMBANGAN AWAL RENCANA PENGERUKAN
Wibowo, Mardi
Balai Teknologi Infrstruktur Pelabuhan dan Dinamika Pantai – BPPT
Array
Rona lingkungan awal kualitas air sungai dan sedimen dasar sangat diperlukan sebelum dilakukan pengerukan sebagai bahan untuk memperkirakan dampak lingkungan yang muncul akibat kegiatan pengerukan. Pengambilan sampel air dilakukan dengan mengikuti Standard Method dari APHA-AWWA (1995) dan dianalisis di laboratorium dengan berpedoman pada Peraturan Pemerintah No. 82 Tahun 2001 Tentang Pengelolaan Kualitas Air dan Pengendalian Pencemaran Air. Berdasarkan hasil analisis dan kajian ini diketahui bahwa kualitas air sungai di Kutai Lama masih tergolong baik (berdasarkan baku mutu air Kelas I PeraturanPemerintah No. 82 Tahun 2001). Beberapa parameter yang melebihi baku mutu air Kelas I PP No. 82 Tahun 2001 adalah BOD, COD, DO, Besi (Fe), deterjen sebagai MBAS. Khusus untuk kandungan logam berat semuanya masih memenuhi baku mutu yang telah ditetapkan. Kualitas sedimen dasar: konsentrasi logam mangan (Mn) sangat tinggi jika dibandingkan dengan konsentrasi logam-logam lainnya. Konsentrasi logam berat yang ditemukan dalam jumlah besar berikutnya adalah besi (Fe), seng (Zn), tembaga (Cu) dan yang terkecil adalah timbal (Pb).Berdasarkan standar baku mutu sedimen yang dibuat oleh United State Environmental Protection Agency (USEPA) dan Kementerian Lingkungan Kanada, semua konsentrasi logam-logam berat di daerah kajian termasuk dalam kategori tercemar berat.
Universitas Diponegoro
2017-05-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/14716
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 1 (2017): Maret 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/41472
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
Planning for Small-Scale Business (USK) Batik Wastewater Treatment Plant X Yogyakarta
Rahmalia, Intan
Universitas Pertamina
Hilmi, Farhan Muhammad
Universitas Pertamina
Septiariva, Iva Yenis
Universitas Sebelas Maret
Aryanto, Reifaldy Tsany Betta
Universitas Pertamina
Handayani, Sri Dewi
Universitas Pertamina
Priutama, Yesaya Emeraldy
Universitas Pertamina
Sarwono, Ariyanti
Universitas Pertamina
Suryawan, I Wayan Koko
Universitas Pertamina http://orcid.org/0000-0002-5986-0430
Array
Small scale business / Usaha Skala Kecil (USK) X currently does not have a batik wastewater treatment unit. This condition causes the possibility of contamination to water bodies. USK X wastewater treatment applications' planning needs to be carried out sustainably, namely by reusing water. The process units needed in this planning are the sequencing batch reactor (SBR) and constructed wetlands. The effluent of textile wastewater with this system for parameters BOD, COD, TSS, sulfide, total oil & fat, and color were 0.13 mg/L; 106.5 mg/L; 2.4 mg/L; 0.036 mg/L; 0.07 mg/L; and 90.67 PtCo, respectively. The dimensions of the SBR unit required are 0.75 x 0.6 x 1 m. Modification of the SBR unit uses an ozone generator to produce ozone gas which functions as oxidation of organic pollutants and colors in batik waste. After processing in the SBR unit, it is carried out using a constructed wetland with 2.56 m2.
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/41472
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/17863
2020-04-17T18:35:47Z
presipitasi:RSA
"180329 2018 eng "
2550-0023
1907-817X
dc
Inventarisasi dan Sebaran Emisi Aktivitas Pelabuhan dengan Aermod View
Huboyo, Haryono Setiyo
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Andarani, Pertiwi
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Hadiwidodo, Mochtar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Transportasi laut termasuk penyumbang emisi polutan udara baik dari aktivitas pelayaran di laut maupun aktivitas di pelabuhan.Inventarisasi emisi polutan udara sektor transportasi laut masih sangat jarang.Kajian ini dilakukan untuk mengkuantifikasi dan mengestimasi sebaran emisi dari sektor transportasi laut di pelabuhan.Inventarisasi menggunakan data operasional pelabuhan dan faktor emisi sekunder.Sebaran emisi polutan udara dari aktivitas pelabuhan diperkirakan dengan model AERMOD View. Hasil inventarisasi beban emisi dari aktivitas transportasi laut di pelabuhan didominasi oleh aktivitas pelayaran dalam pelabuhan yaitu pada saat approaching time disusul oleh aktivitas mesin bantu saat bongkar muat (berthing time). Aktivitas bongkar muat di darat hanya berkontribusi 1% dari aktivitas mesin bantu saat berthing time.
Sebaran emisi polutan udara aktivitas bongkar muat cenderung mengarah ke Barat Laut-Tenggara, sementara sebaran emisi dari aktivitas pelayaran cenderung merata ke sebagian besar area Semarang kawasan tengah dan Utara.
Universitas Diponegoro
2018-03-29 12:24:08
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/17863
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 1 (2018): Maret 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/46123
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
Decision-Making Strategy of Hospital Waste Management Using the TOPSIS Method
Rimantho, Dino
Universitas Pancasila http://orcid.org/0000-0001-8931-1611
Putri, Gita Azizah
Universitas Pancasila
Array
Clinical waste is likely to include disease-causing microorganisms, chemical wastes, and other treatments used to treat different conditions, whether solid or liquid. As a result, clinical wastes have a more significant potential for pathogenicity and toxicity than most other types of waste in all of their forms. This study aims to design a strategic decision model for managing medical waste from hospitals. The method used in this research is the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). The data was collected using a questionnaire distributed to three people from various fields: hospital waste management experts, academics, and the environmental service. The results show that the preference for the best hospital waste management strategy is SOP improvement with a weight of 0.6576. Furthermore, the alternative of investing in environmentally friendly technology, 3R campaigns, and outreach to employees and visitors received a weight of about 0.4885, 0.2973, and 0.3393, respectively. This study can be a reference for research related to decision-making strategies and the field of hospital waste management.
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/46123
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20815
2020-04-17T18:37:17Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
PEMANFAATAN LIMBAH TAHU SKALA RUMAH TANGGA MENJADI BIOGAS SEBAGAI UPAYA TEKNOLOGI BERSIH DI LABORATORIUM PUSAT TEKNOLOGI LINGKUNGAN – BPPT
Nisrina, Hanifah
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Andarani, Pertiwi
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Array
Limbah cair yang dihasilkan industri tahu sangat merugikan lingkungan jika tidak dilakukan pengolahan terlebih dahulu. Namun, limbah cair tahu dapat diolah secara anaerob sehingga menghasilkan biogas. Maka dari itu, penelitian ini bertujuan untuk mengetahui besarnya potensi biogas yang dapat dihasilkan dari limbah cair tahu sebagai upaya dalam teknologi bersih serta mengetahui kelayakannya dari aspek ekonomi dan lingkungan. Penelitian dilakukan pada industri tahu skala rumah tangga yang berlokasi di Desa Puspiptek, Tangerang Selatan dengan metode digesti anaerobik. Hasil penelitian menunjukkan bahwa selama waktu tinggal 14 hari, limbah tahu menghasilkan biogas sebesar 1.525 liter dengan penurunan kandungan COD sebesar 8,1% dari 748,75 mg/L menjadi 688,125 mg/L, Total Solid sebesar 56,9% dari 16,36 g/L menjadi 7,049 g/L, dan Volatile Solid sebesar 66,3% dari 14,85 g/L menjadi 5,001 g/L. Hasil analisis simulasi kelayakan biogas berdasarkan aspek ekonomi berupa Harga Pokok Penjualan (HPP) Rp7.342 per kg, BEP 109.500 kg/tahun, dan PBP 0,48 dengan pengolahan limbah tahu sebesar 5676 liter per hari, menghasilkan biogas sebanyak 5,174 m3 per hari. Banyak sekali manfaat yang didapat dari pemanfaatan limbah menjadi biogas, baik dari aspek ekonomi, lingkungan, maupun sosial
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20815
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20780
2018-10-24T15:29:57Z
presipitasi:RSA
oai:ojs.ejournal.undip.ac.id:article/24275
2020-04-17T18:38:54Z
presipitasi:RSA
"190731 2019 eng "
2550-0023
1907-817X
dc
Total Coliform Sumber Air Bersih dan Sistem Distribusi Air bersih Rumah Sakit Umum Daerah Ungaran Kabupaten Semarang
Sari, Jasmine Purnama
Universitas Diponegoro
Rahardjo, Mursid
Universitas Diponegoro
Joko, Tri
Universitas Diponegoro
Array
RSUD Ungaran menggunakan sumur bor dalam memperoleh air bersih. Total coliform yang terkandung pada sumber air, bak penampung dan ruang Gizi adalah lebih dari 200 CFU/100 ml. Penelitian ini bertujuan untuk mendeskripsikan sumber, sistem distribusi serta efektivitas desinfeksi air bersih. Populasi objek adalah seluruh air bersih RSUD Ungaran, dengan sampel adalah air sumur, bak penampung dan air bersih yang keluar dari kran. Variabel dependen adalah total coliform pada air bersih dan variabel independen adalah kualitas dan kuantitas sumber air, kualitas jaringan distribusi dan dosis desinfektan dengan variabel pengganggu adalah pH dan suhu. Rata-rata pasokan air bersih RSUD Ungaran adalah 2.79 liter/detik. Kapasitas tempat tidur sebanyak 187 dengan kebutuhan 566 liter/tempat tidur/hari. Kebutuhan air bersih rumah sakit 2.48 liter/detik. Kebocoran pipa sering terjadi sehingga menyebabkan bahan pencemar seperti bakteri coliform akibat rembesan septic tank yang berjarak <10 m dengan pipa masuk kedalam air. Penambahan Kalsium Hipoklorit Ca(ClO)2 dosis 10, 15, 20, 25, dan 30 mg/l dengan waktu kontak 30 menit mampu menurunkan total coliform sebesar 98.5% yaitu jumlah rata – rata MPN Coliform kurang dari 3 atau disebut tidak terdapat pertumbuhan mikroorganisme.
Universitas Diponegoro
2019-07-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24275
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 2 (2019): Juli 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/25616
2020-08-31T06:24:09Z
presipitasi:RSA
"191130 2019 eng "
2550-0023
1907-817X
dc
Potential and Effects of Banana Stems as Filter Media in Motor Vehicle Washing Wastewater Treatment
Kusumawardani, Yustika
Universitas Pandanaran
Subekti, Sri
Universitas Pandanaran
Soehartono, Soehartono
Universitas Pandanaran
Array
Air limbah pencucian kendaraan bermotor yang dibuang langsung ke badan air dapat meningkatkan kadar pencemaran. Pengolahan air limbah usaha pencucian motor skala kecil haruslah efisien, tidak memerlukan lahan luas, mudah dioperasikan serta ekonomis. Alternatif teknologi pengolahan air limbah untuk usaha pencucian motor skala kecil adalah menggunakan sistem filtrasi sederhana. Batang pisang dapat dimanfaatkan sebagai media penyaring. Penelitian sebelumnya menyebutkan batang pisang memiliki kandungan selulose serta memiliki kemampuan higroskopis tinggi. Kandungan selulosa yang tinggi memungkinkan potensi dijadikan sebagai media penyerap. Sifat higroskopis bermanfaat menyerap bahan kimia anorganik berbahaya. Penelitian dilakukan dengan membuat reaktor filtrasi menggunakan media filter batang pisang dengan variasi waktu tinggal dan ketebalan media filter. Pengujian sampel dilakukan dengan menganalisis parameter uji COD, TSS dan Deterjen. Hasil uji menunjukan penurunan yang signifikan pada parameter TSS dan deterjen. Besarnya presentase penurunan tertinggi pada parameter TSS mencapai 91% dan deterjen 96%. Parameter COD mengalami penurunan saat perlakuan filtrasi secara langsung, namun kemudian meningkat seiring waktu tinggalnya. Hal tersebut karena pengaruh biologis batang pisang serta tingginya presentase bahan organik dan biomassa batang pisang. Dapat disimpulkan bahwa batang pisang berpotensi sebagai media filter pengolahan air limbah secara langsung dan hasilnya cukup efektif untuk menurunkan parameter TSS dan deterjen air limbah pencucian kendaraan bermotor.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/25616
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
ind
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/24184
2020-12-17T04:04:20Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Hydrogeological Mapping for Analyzing of Groundwater Conservation Zone in Sumowono Groundwater Basin, Central Java Province
Putranto, Thomas Triadi
Universitas Diponegoro http://orcid.org/0000-0002-5935-7405
Susanto, Novie
Universitas Diponegoro
Pangestuti, Dina Rahayuning
Universitas Diponegoro
Pranata, Mathias Andika Setya
Universitas Diponegoro
Array
Groundwater management at groundwater basins Sumowono needs to be done because of the increasing development of the area. This research is oriented to analyzing groundwater conditions, compiling groundwater conservation zones, and explaining conservation zones' suitability with spatial maps. The method used is mapping hydrogeological conditions such as surface observation of rock types, inventory of hydrogeological points of interest, knowing the patterns and directions of groundwater flow, groundwater utilization, and groundwater sampling to measure the degree of acidity and electrical conductivity. From the mapping results, it is found that the lithology is composed of tuffaceous sandstones and volcanic breccias. Based on the free groundwater table analysis, the free groundwater flow pattern follows the topographic slope, flowing from the high topography on the south and southeast sides to the low topography on the north side of the area. The utilization of groundwater is used for irrigation, domestic and fishery purposes. Measurement of groundwater samples' quality for the degree of acidity is between 5.32-7.98 while the electrical conductivity is between 36-550 µS / cm, and the level of damage due to groundwater utilization is included in the safe zone. The groundwater conservation zone consists of recharge areas and spring protection zones. The result of overlapping between the groundwater conservation zone and the spatial plan map shows suitability as a protection zone.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24184
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
eng
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/33876
2020-12-17T04:33:11Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Potential of Renewable Energy Resources from Biomass Derived by Natural Resources In Balikpapan
Febrianti, Nia
Institut Teknologi Kalimantan
Filiana, Firilia
Institut Teknologi Kalimantan
Hasanah, Primadina
Institut Teknologi Kalimantan
Array
Sumber energi biomassa mempunyai beberapa kelebihan seperti dapat dijadikan sebagai sumber energi yang dapat diperbaharui sehingga sumber energi dari biomassa tersebut dapat menyediakan sumber energi yang berkelanjutan. Salah satu langkah awal untuk mengetahui potensi sumber daya energi yang bisa dikembangkan untuk menjadi sumber energi terbarukan adalah dengan cara melakukan pendataan. Pendataan yang dilakukan pada penelitian ini lebih berfokus pada biomassa terdapat di Balikpapan. Potensi biomassa yang terdapat di Balikpapan perlu diketahui dengan cara mengumpulkan dan mengelompokkan data biomassa tersebut berdasarkan hasil produk dari pertanian dan perkebunan. Data yang telah dikumpulkan dari data sekunder dan dari survey kemudian dipetakan untuk dapat dilihat potensi biomassa yang paling besar yang terdapat di Balikpapan. Persentase hasil panen per tahun paling besar terdapat di Kecamatan Balikpapan Utara yaitu sebesar 31% disbanding dengan lima kecamatan lainnya. Potensi biomassa yang berasal dari sumber daya alam Kota Balikpapan yang paling besar jumlah hasil panennya yaitu tanaman pangan ubi kayu yang terdapat di Kecamatan Balikpapan Utara sebesar 7.259 ton/tahun. Pada jenis buah, salak memiliki jumlah hasil panen tertinggi per tahun yaitu sekitar 32.945 ton/tahun. Pada potensi limbah dari tanaman pangan limbah ubi kayu yang berasal dari batang pohon sebesar 5.807,2 ton/tahun, kulit ubi sebesar 1.088,8 ton/tahun.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/33876
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/36456
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Analysis of Chemical Properties and Heavy Metals from Cisadane River, Tangerang, Indonesia
Rosarina, Desy
Universitas Muhammadiyah Tangerang
Laksanawati, Ellysa Kusuma
Universitas Muhammadiyah Tangerang
Rosanti, Dewi
Universitas PGRI Palembang
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This paper explained heavy metals and chemical properties from the Cisadane River in Tangerang City. A survey method was used to determine the place for sampling the test material. Water measurement is carried out in situ and laboratory tests. Data retrieval was done by purposive sampling determining three observation stations, namely in the Taman Gajah Tunggal park area (station1), Babakan Cikokol residential area (station 2), and Karawaci paper mill area (station 3). The analysis was carried out exactly using analysis. Namely, analysis carried out in the laboratory. The parameters observed were COD, phosphate, DO, BOD, pH. Results of this study informed the water quality in the Cisadane City river did not meet Class II Water Quality Standards based on Government Regulation Number 82, the year 2001. The COD content only meets class II water quality standards at stations 1 and 3. BOD and phosphate content is high and exceeds class II water quality standards. Heavy metal content still meets the water quality standard threshold with a value of Cd less than 0.01 mg/L, Cu less than 0.02 mg/L, Pb less than 0.03mg/L, and Cr less than 0.05mg/L. Zn content exceeds the water quality standard threshold at station three and meets water quality standards at stations 1 and 2 with a value of less than 0.05mg/L.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/36456
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/12488
2020-04-17T18:33:29Z
presipitasi:RSA
"161029 2016 eng "
2550-0023
1907-817X
dc
PENGGUNAAN BIOCATALYS ELECTROLYSIS DALAM PENURUNAN KONSENTRASI TOTAL SUSPENDED SOLID (TSS) DAN CHEMICAL OXYGEN DEMAND (COD) LIMBAH DOMESTIK
Oktiawan, Wiharyanto
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Hadiwidodo, Mochtar
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Purwono, Purwono
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Array
Secara umum air limbah kegiatan rumah tangga (domestik) dibuang langsung menuju badan air seperti sungai dan danau. Pengolahan limbah cair secara biologis (aerob) sering menghasilkan lumpur dalam jumlah besar. Jumlah lumpur dapat dikurangi dengan pengolahan anaerob. Sistem bioelektrokimia merupakan salah satu terobosan teknologi yang memungkinkan untuk mengolah limbah sekaligus menghasilkan energi berupa gas metana. Penggunaan biocatalys electrolysis dapat mengatasi kelemahan proses anaerob secara konvensional dalam penurunan konsentrasi TSS dan COD limbah domestik salah satunya mampu menghasilkan gas H2 dari proses elektrolisis. Penambahan daya ekternal sebesar 6 volt mampu menyisihkan TSS sampai kadar 82 mg/l dari kadar semula 157 mg/l. Tegangan 12 volt mampu menurunkan kadar COD sampai 47,46 mg/l dari kadar awal 223 mg/l. Penyisihan TSS paling rendah pada waktu elektrolisis 15 menit dengan kadar 87 mg/l. Penambahan waktu elektrolisis sebanding dengan penurunan konsentrasi COD limbah domestik. Pada penelitian ini kualitas maupun kuantitas gas metana tidak diketahui secara jelas. Selain gas metan, produk fermentasi juga belum diketahui.
Universitas Diponegoro
2016-10-29 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/12488
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 13, No 2 (2016): September 2016
eng
Copyright (c) 2016 Jurnal Presipitasi
oai:ojs.ejournal.undip.ac.id:article/39574
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
Treatment of Domestic Wastewater with Combination of Phytoremediation and Filtration Using Activated Carbon of Tea Dregs
Nurhidayanti, Nisa
Bandung Institute of Technology https://orcid.org/0000-0001-8625-0446
Ardiatma, Dodit
Pelita Bangsa University
Tasdik, Jamaludin
Pelita Bangsa University
Array
One source of water pollution comes from domestic wastewater as a result of daily human activities. As one of the work units in the field of education, the university also produces domestic liquid waste that needs to be processed so as not to pollute the environment. The use of the phytoremediation method with water jasmine and water hyacinth combined with the use of tea dregss as an activated carbon filter is one method that can be used to treat domestic greywater wastewater. The purpose of this study was to determine the efficiency of reducing levels of COD, BOD, TSS, NH3, and turbidity in domestic greywater waste at Pelita Bangsa University by phytoremediation methods using water jasmine plants and water hyacinth plants with a combination of filters from tea dregss. The research procedure starts by making activated carbon from tea dregss, characterizing activated carbon with SEM, sampling greywater wastewater, characterizing wastewater test, plant acclimatization, range-finding test, phytoreactor test with activated carbon filter, and data analysis. The phytoremediation method with a combination of filtration using tea dregss activated carbon produces an efficiency of 99.61% COD reduction, 100% BOD, 98.68% TSS, 100% ammonia, and 97.50% turbidity.
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/39574
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/15445
2020-04-17T18:34:36Z
presipitasi:RSA
"171109 2017 eng "
2550-0023
1907-817X
dc
Penerapan Produksi Bersih Dalam Upaya Penurunan Timbulan Limbah Cair Di Pabrik Gula Tebu
Paramitadevi, Yudith Vega
Teknik dan Manajemen Lingkungan, Institut Pertanian Bogor
Nofriana, Risa
Teknik dan Manajemen Lingkungan, Institut Pertanian Bogor
Yulisa, antin
Teknik dan Manajemen Lingkungan, Institut Pertanian Bogor
Array
Tebu (Saccharum officianarum L.) adalah tanaman yang mempunyai banyak manfaat, salah satunya sukrosa yang terdapat pada batang tebu yang dimanfaatkan untuk menghasilkan kristal gula. Kristal gula yang terbentuk mengalami pemrosesan yang panjang, dimulai dari penggilingan tebu hingga pemasakan. Pada proses pengolahan tersebut akan menghasilkan gula produk sekaligus limbah cair yang memiliki beban pencemaran organik tinggi. Tindak produksi bersih dalam industri gula tebu diperlukan agar penghematan air baku dan pencemaran air dapat terlaksana. Kajian terhadap produksi bersih dilakukan melalui studi kasus yang sifatnya deskriptif pada salah satu industri gula tebu di Indonesia. Identifikasi terhadap peluang produksi bersih dilakukan agar diperoleh pengaruh keseluruhan terhadap kinerja lingkungan, terutama pengurangan terhadap beban influen yang masuk ke IPAL. Sebanyak 6 alternatif peluang produksi bersih untuk penghematan konsumsi air baku dan 4 alternatif peluang produksi bersih untuk reduksi timbulan limbah cair diberikan. Peluang produksi bersih yang akhirnya dapat diterapkan yakni recycle air kondensat larutan gula, air bekas scrubber dan penerapan good house keeping. Debit air yang masuk ke IPAL berkurang 51.72%, setara dengan 4500 m3 air baku per hari, atau penghematan sebesar Rp 17.235.310,00 per tahun. Perancangan desain IPAL ulang juga diusulkan untuk mengatasi permasalahan konvensional yang melekat pada sistem kolam anaerobik-aerobik.
Universitas Diponegoro
2017-11-09 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/15445
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 2 (2017): September 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/45285
2022-12-15T03:16:03Z
presipitasi:RSA
"220330 2022 eng "
2550-0023
1907-817X
dc
Analysis and Evaluation of West Semarang Distribution Pipe Network System Municipal Waterworks in Semarang City
Miseno, Bernadinus Gunawan Broto
Universitas Diponegoro
Samadikun, Budi Prasetyo
Universitas Diponegoro
Sarminingsih, Anik
Universitas Diponegoro
Array
The need for clean water is related to the growth rate and population density. High population density affects access to clean water. The population in the DWSS (Drinking Water Supply System) area of West Semarang is concentrated in three sub-districts, namely West Semarang (148,879 people), Ngaliyan (141,727 people), and Tugu (32,822 people). With the average population growth rate of Semarang City from 2011 to 2020 of 0.89%, the need for clean water will continue to increase. The condition of clean water services in Semarang City, which Municipal Waterworks manage, needs to be improved, both in terms of coverage and continuity of service distribution. The research method used is the method of field research and literature. Hydraulic data retrieval was obtained through field observations and water usage data from the internal Municipal Waterworks in Semarang City. The data were analyzed using the epanet program. From the analysis results, there were areas with significant differences in water pressure values , and at peak hours, there were areas that did not get sufficient water supply. It can be concluded that there are problems in the piping network in the West Semarang DWSS area.
Universitas Diponegoro
2022-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/45285
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 1 (2022): March 2022
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/45285/141375
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20782
2020-04-17T18:36:43Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
ANALISIS KOMPARATIF PERAN ADAT DAN KEPERCAYAAN DALAM PENINGKATAN KUALITAS LINGKUNGAN PERMUKIMAN BERKACA PADA ADAT YANG ADA DI PERMUKIMAN TRADISIONAL
Wardiha, Made Widiadnyana
Balai Penelitian dan Pengembangan Perumahan Wilayah II Denpasar, Werdhapura Village Center, Jalan Danau Tamblingan No. 49, Sanur, Denpasar, Indonesia 80228
Array
Pembangunan fasilitas air minum dan sanitasi secara swadaya merupakan salah satu cara untuk melibatkan masyarakat dalam program pembangunan. Walaupun masyarakat sudah dilibatkan, namun pemanfaatan fasilitas oleh masyarakat seringkali belum maksimal. Kurangnya kesadaran masyarakat menjadi salah satu faktor. Faktor lainnya yang kemungkinan berperan adalah karena kurang diperhatikannya aspek adat dan kepercayaan dalam proses pembangunan. Makalah ini mencoba mengkaji mengenai peran adat dan kepercayaan masyarakat dalam pembangunan fasilitas untuk meningkatkan kualitas lingkungan permukiman. Tujuannya adalah untuk memberikan salah satu aspek yang dapat diperhatikan apabila akan memberikan sosialisasi atau membangun infrastruktur sanitasi bagi masyarakat. Metode yang digunakan dalam kajian ini yaitu pengumpulan hasil-hasil penelitian yang telah dilakukan dari tahun 2010 sampai tahun 2016 mengenai adat dan kepercayaan di permukiman tradisional yang berpengaruh terhadap perilaku sanitasi masyarakat, yang kemudian dikomparasi dengan hasil penelitian ilmiah lain mengenai peran adat dan kepercayaan dalam peningkatan kualitas lingkungan di masyarakat secara umum. Hasil penarikan kesimpulan pada kajian ini adalah bahwa adat dan kepercayaan merupakan aspek yang cukup kental terkait dengan kehidupan masyarakat Indonesia, dimana hal ini perlu diperhatikan dalam upaya peningkatan kesadaran masyarakat mengenai sanitasi dan program-program pembangunan bidang air minum dan sanitasi. Pelibatan para pemimpin adat di masyarakat serta penggunaan slogan atau motto yang bernuansa adat setempat juga dapat dilakukan dalam program seperti sosialisasi kepada masyarakat.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20782
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/12487
2017-07-14T02:08:21Z
presipitasi:RSA
oai:ojs.ejournal.undip.ac.id:article/23617
2020-04-17T18:38:37Z
presipitasi:RSA
"190731 2019 eng "
2550-0023
1907-817X
dc
Implementasi Investasi Hijau dan Strategi daya Saing Hijau Terhadap Green Banking di Kota Surakarta
Awatara, I Gusti Putu Diva
Sekolah Tinggi Ilmu Ekonomi Adi Unggul Bhirawa http://sinta2.ristekdikti.go.id/author/?mod=profile&p=update http://orcid.org/0000-0003-1095-3932
Hamdani, Anwar
Sekolah Tinggi Ilmu Ekonomi Adi Unggul Bhirawa
Array
The implementation of green banking principle is reflected in a series of initiatives for the community program, community development and business programs, and encourages investment in more responsible businesses as a form of Bank's high concern for the environment. This study aims to analyze Green Investment, and Green Competitive Strategies that have an impact on the implementation of Green Banking in Surakarta City. This research was a survey conducted on bank customer in Surakarta City. The sample in this study was 75 respondents. Data collection methods use in this study were questionnaire and observation. The analysis technique used includes the test of the research instrument, namely the validity and reliability test; classic assumption test include: heteroscedasticity, autocorrelation, normality and multicollinearity test. Hypothesis test is done by using multiple linear regression analysis, t test, F test and analysis of the coefficient of determination (R2). The results of this study indicate that green investment and green competitive strategies have an impact on the implementation of green banking in Surakarta City. The variable that has the greatest impact is Green Competitive Strategies.
Universitas Diponegoro
2019-07-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/23617
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 2 (2019): Juli 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/51155
2023-08-18T09:24:32Z
presipitasi:RSA
"230730 2023 eng "
2550-0023
1907-817X
dc
Removal Efficiency of Total Chrome (Cr-T) from Textile Industry Wastewater PT. X with Sodium Bentonite Using the Adsorption Method
Hartati, Etih
Institut Teknologi Nasional
Nur Azizah, Raisa
Institut Teknologi Nasional
Marganingrum, Dyah
National Research and Innovation
Array
As much as 10-50% of dye wastewater from the dyeing process is discharged directly into the environment. Chromium is the metal most often found in textile industry wastewater, one of which comes from dyes of the Congo Red type, so processing is required. One of the treatments to remove total chromium from textile industry wastewater is adsorption, with sodium bentonite as an adsorbent. This study aimed to determine the optimum efficiency and processing of total chromium using sodium bentonite as an adsorbent with a batch system and to determine the appropriate type of isotherm. The method used to test total chromium was the standard addition method which was then measured using an AAS (Atomic Absorption Spectrophotometry). The variables studied were the effect of wastewater pH, sodium bentonite and grain size of wastewater on the efficiency of total chromium removal. The types of isotherms tested are Langmuir and Freundlich isotherms. In removing total chromium with sodium bentonite, optimum conditions were obtained at pH 8 with a grain size of 80 mesh and a volume of 50% wastewater with a removal efficiency of 98.08%. The appropriate isotherm model for sodium bentonite is the Freundlich isotherm.
Universitas Diponegoro
2023-08-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/51155
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 2 (2023): July 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/58792
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
Study of the Effect of Adding Eco-Enzyme to the Process of Decomposing Organic Waste on the Quality of Compost, Leachate, and Methane Gas Production
Sarminingsih, Anik
Universitas Diponegoro https://orcid.org/0000-0002-8550-5803
Sumiyati, Sri
Universitas Diponegoro
Syafrudin, Syafrudin
Universitas Diponegoro
Alfarisi, Irfan
Universitas Diponegoro
Setiawan, Risky
Universitas Diponegoro
Andika, Axelino Farrell
Universitas Diponegoro
Balqis, Mustika
Universitas Diponegoro
Array
Waste generation is increasing along with the increase in population and human living needs. The most dominant waste composition in Indonesia is organic waste, which accounts for 53.97% of the total waste. Eco-enzyme is one of the waste utilization products that has the potential to become an activator for the decomposition process and reduce the environmental effects of waste decomposition. The aim of this research is to analyse the micronutrient content of compost, reduce leachate toxicity, and accelerate the production of methane gas resulting from decomposition using eco-enzymes. The method used was an experimental method (trial) to obtain primary data from laboratory test results during 28 days of research. The research results show that, in general, there is a significant difference in the quality of compost in organic waste that uses eco-enzyme compared to that that does not use eco-enzyme. The results of measuring the quality of the leachate resulting from decomposition show that the quality of the leachate that uses eco-enzyme is better and has lower toxicity than without using eco-enzyme (control). In the production of methane gas, the results show that methane gas production in decomposition using eco-enzymes reaches the methanogenesis process more quickly.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/58792
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/29086
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Utilization of Compilation of Bentonite and Activated Carbon from Coal to Reduce BOD and COD Levels in Rubber Industrial Wastewater
Naswir, Muhammad
Universitas Jambi
Yasdi, Yasdi
Universitas Jambi
Chaniago, Muhammad Akbar
Universitas Jambi
Wibowo, Yudha Gusti
Universitas Jambi
Array
Industri karet telah menghasilkan limbah cair yang berbahaya bagi lingkungan sehingga diperlukan upaya pengolahan. Penelitian ini bertujuan untuk mengetahui kemampuan kompilasi bentonit dan karbon aktif yang terbuat dari batubara sebagai adsorben untuk penjerapan parameter limbah cair industri karet. Adapun hasil uji parameter limbah karet didapatkan bahwa kadar BOD (Biochemical Oxygen Demand) 805 ppm, COD (Chemical Oxygen Demand) 1415 ppm, amonia 12,5ppm, TSS 340 ppm, pH 6,60. Proses aktivasi bentonit dilakukan dengan manggunakan HCL 0,1 M, kemudian diaduk selama 1 jam dengan kecepatan 200 rpm lalu disaring residu yang dihasilkan dipanaskan dengan suhu 110oC selama 3 jam. Proses aktivasi karbon aktif dilakukan dengan menggunakan H3PO4 0,2 M lalu direndam selama 24 jam, kemudian dicuci dengan aquades sampai pH mendekati netral, dikeringkan dalam oven pada suhu 150 oC. Waktu kontak terbaik pada kompilasi bentonit dan karbon aktif dari batubara sebanyak 0,1 gram (1:1) dengan 250 ml limbah cair industri karet adalah 60 menit dengan efisiensi penjerapan BOD 99,75% dan COD 98,72%. Kompilasi terbaik bentonit dan karbon aktif dari batubara dalam penjerapan BOD & COD terdapat pada perbandingan kompilasi (1:1) dengan efisiensi penjerapan BOD 99,75% dan COD 98,72%.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/29086
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/32371
2020-12-17T04:32:55Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Opportunities for Application of Cleaner Production in the Sago Flour Industry
Maulidia, Vera
Universitas Tanjungpura
Jati, Dian Rahayu
Universitas Tanjungpura
Apriani, Isna
Universitas Tanjungpura
Bhaskara, Renaldi Surya
Universitas Tanjungpura
Firmansyah, Muhammad
Universitas Tanjungpura
Array
Peningkatan permintaan olahan sagu berdampak pada peningkatan produksi tepung sagu. Peluang produksi tepung sagu kemudian dimanfaatkan sebagian pengusaha untuk memproduksi dengan skala pabrik. Meningkatnya daya saing antar pengusaha menyebabkan banyak aspek diperlukan untuk menaikkan kualitas pemasaran diantaranya usaha untuk mengurangi limbah yang dihasilkan dari setiap proses produksi. Penelitian ini bertujuan untuk mengidentifikasi proses produksi tepung sagu dan memberikan rekomendasi minimalisasi limbah dan teknologi bersih pada industri tepung sagu. Metode wawancara dan observasi lapangan dilakukan pada penelitian ini. Volume timbulan limbah yang dihasilkan pada proses produksi tepung sagu meliputi 10 kg karung bekas, 10 kg ceceran lamantak, 100 kg ampas sagu, 60 kg ceceran tepung sagu, 20 kg abu sisa pembakaran dan 50 kg tepung sagu kasar. Limbah cair berupa air bekas sebanyak 36.042 liter. Metode produksi bersih yang dapat dilakukan yaitu mengurangi penggunaan air cucian, menjual kembali karung bekas menjadi kerajinan tangan, mengembalikan ceceran tepung dan tepung sagu kasar ke bak pembongkaran dan penyurahan, menjual abu sisa pembakaran, menjual ampas sagu menjadi pakan ternak bebek dan mengolah limbah cair produksi menggunakan IPAL berkapasitas minimal 5.000 liter. Metode yang ditawarkan dapat mengurangi penggunaan air bersih sebanyak 2.358 liter dari total kebutuhan air sekali produksi 38.400 liter.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/32371
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34885
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Agustin, Niyar Candra
Prasdiantika, Ricka
Kusumawardani, Yustika
Biodiesel has become an alternative energy source that continues to be developed. In this research, biodiesel synthesis from tofu dregs oil has been carried out through two stages of the reaction, namely the esterification stage using H2SO4 catalyst to reduce the content of FFA (Free Fatty Acid) and the transesterification stage using KOH catalyst to produce biodiesel. The esterification reaction using 2% H2SO4 catalyst was carried out by microwave heating at power variation of the microwave power 150, 300, 450, 600, 800 Watt with a reaction time of 10 minutes. The transesterification reaction was carried out with variations in microwave power of 150, 300, 450, 600, 800 watts and variations of the reaction time of 5, 10,15,20, and 25 minutes. Biodiesel products were characterized using Gas Chromatography-Mass Spectroscopy (GC-MS), Hydrogen-1 Nuclear Magnetic Resonance (1H-NMR) spectrometer, and feasibility test with the American Standard for Testing Material (ASTM). The characterization results showed that tofu dregs oil biodiesel has been successfully synthesized. The optimum biodiesel was achieved at 600 Watt microwave power with a reaction time of 20 minutes at 92%. The formation of biodiesel is evidenced by several methyl ester peaks, namely methyl oleate (59.98%), methyl linolenic (28.13%), methyl palmitate (8.54%), and methyl stearate (2.32%). Based on the results of ASTM biodiesel tofu dregs oil has met SNI-04-7182-2006 standards, namely the specific density parameter 60/60 ° F (0.87 g/cm3), kinematic viscosity at 40 ° C (4.3 mm2/s), pour point (8 °C), flash point (202 °C) and cloud point (7 )° C for biodiesel.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34885
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/34885/104175
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/4804
2013-05-15T06:21:12Z
presipitasi:RSA
"120301 2012 eng "
2550-0023
1907-817X
dc
PERKEMBANGAN BIOFILM NITRIFIKASI DI FIXED BED REACTOR PADA SALINITAS TINGGI
Sudarno, Sudarno
http://staff.undip.ac.id/env/sudarno/
Array
Development of nitrification biomass that is growing attached on carried material was examined by
measuring its ammonium or nitrit oxidation rates. Porous ceramic rings (36 pieces) were put into the
fixed bed reactor (FBR ). The fixed bed reactor that was operated continuously for more than 500 day
was continued to be operated at a HRT of 1 day, a DO of above 5 mg L
-1
and pH of 8. Ammonia
concentration in the feeding was 50 mg NH
4
+
-N
L
-1
. At days 1, 5, 12, 20, 33 and 50, six porous
ceramic rings were taken out and then ammonia and nitrite removal rate by biofilm in the ceramic rings
was separately measured. The measurement of rates was done in small cylindrical glass reactors with
initial concentration of ammonia and nitrite was 10 mg N L
-1
. Until 50 days of incubation AORs were
always higher than NORs. Additionally, ammonia oxidizers attach or grow faster in the porous ceramic
material than nitrite oxidizers.
Keywords: saline wastewater, Ammonium Oxidizing Bacteria, Nitrit Oxidizing Bacteria, biofilm
Universitas Diponegoro
2012-03-28 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/4804
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 9, No 1 (2012): Vol 9, No 1 (2012)
eng
Copyright (c)
oai:ojs.ejournal.undip.ac.id:article/39700
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
Mercury Determination Using Stannous Chloride Reductant Followed by Atomic Absorption Spectrometric Measurement: Performance Characteristics, Uncertainty Estimation, and Compliance Assessment
Ridwan, Yohanes Susanto
Indonesian Institutes of Sciences https://orcid.org/0000-0002-6631-6142
Koesmawati, Tiny Agustina
Indonesian Institutes of Sciences
Persulessy, Anna Edy
Indonesian Institutes of Sciences
Rosmalina, Raden Tina
Indonesian Institutes of Sciences
Sunaryani, Astried
Indonesian Institutes of Sciences
Dara, Fitri
Indonesian Institutes of Sciences
Array
Indonesian government has committed to reduce and eliminate mercury. Hence, the intensity of monitoring activities of mercury levels in various matrices would be increased and supported by qualified analytical data. Key characteristic performances, i.e., the limit of detection, linear range, precision, trueness, have been successfully carried out, and the method was shown to fit the purpose. The limit detection, LoD and LoQ, were found to be 0.26 and 0.86 µg/L, respectively, which were adequate to reach the tightest regulatory limit of mercury in surface water (1 µg/L). The examined linearity range of 1-20 µg/L has been found sufficient for its application since a high mercury concentration in the typical sample is seldomly expected. Precision and trueness aspects of the method were shown to have satisfaction performance, with CV of 1,24% and recovery of 104.54%. All the possible uncertainty sources have been identified in this study. Since no reference material was available, the uncertainty of bias was evaluated through the recovery of the spiked sample. Compliance assessment to six measurement results has been performed; one result was below LoQ, four were clearly below regulatory limit, and one was questionable. Hence a decision rule was applied.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/39700
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/16089
2020-04-17T18:35:06Z
presipitasi:RSA
"171109 2017 eng "
2550-0023
1907-817X
dc
Studi Efisiensi Penyisihan COD dalam Lindi dengan Sistem Evapotranspirasi Menggunakan Tumbuhan Sente (Alocasia macrorrhiza) dan Rumput Belulang (Eleusine indica)
Zaman, Badrus
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Wardana, Irawan Wisnu
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Sutrisno, Endro
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Kurniawati, Adistia Dian
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Amalia, Amalia
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
COD dalam lindi merupakan salah satu parameter yang secara umum berada pada konsentrasi yang tiggi sebagai salah satu hasil biodegradasi material organik dan anorganik dalam sampah di TPA. Sistem evapotranspirasi yang menggunakan tumbuhan lokal merupakan salah satu sistem yang menjanjikan. Penelitian dilakukan untuk mengetahui efisiensi penyisihan COD dalam lindi dengan reaktor evapotranspirasi secara kontinyu yang menggunakan tumbuhan Tumbuhan Sente (Alocasia macrorrhiza) dan Rumput Belulang (Eleusine indica). Hasil uji menunjukkan efisiensi pada semua reaktor mulai sekitar hari ke 3 hingga hari ke 25 mengalami fluktuasi yang cenderung menurun (dari ± 75% menjadi ± 50%), tetapi hari selanjutnya cenderung meningkat. Pola tersebut dipengaruhi oleh peran media tanam, bakteri dalam media tanam, bakteri pada akar tumbuhan dan aktivitas metabolisme tumbuhan uji. Secara keseluruhan reaktor yang menggunakan Tumbuhan Sente (Alocasia macrorrhiza) lebih fluktuatif dibandingkan denga menggunakan Rumput Belulang (Eleusine indica) yang dipengaruhi pola pertumbuhan dan perkembangannya.
Universitas Diponegoro
2017-11-09 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/16089
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 2 (2017): September 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/45076
2022-12-15T03:16:03Z
presipitasi:RSA
"220408 2022 eng "
2550-0023
1907-817X
dc
Synthesis, Characterization, and Application of Rubber Fruit Shell as an Adsorbent for Phosphate Removal in Real Grey Water
Naswir, Muhammad
Universitas Jambi
Wibowo, Yudha Gusti
Institut Teknologi Sumatera https://scholar.google.co.id/citations?user=rF1M_60AAAAJ&hl=id https://orcid.org/0000-0003-1013-7732
Laura, Winny
Universitas Jambi
Array
The washing waste from the laundry industry contains phosphate that can pollute the environment. Multiple efforts have been made but have not reached the small to medium-scale laundry industry; this happens because of the high cost of technology. In this paper, the sorption process by rubber fruit shells successfully reduced the pollutants parameter from greywater. This research has succeeded in creating an adsorbent with raw rubber fruit shell waste; studies on manufacturing techniques, adsorbent characteristics, ability to reduce phosphate content, and adsorption isotherm models are well described. This study also promotes the utilization of rubber shell waste that has not been utilized properly. Adsorbents derived from rubber fruit shells reduced phosphate levels by up to 98% by adding 0.5 g of adsorbent to 100 mg/L of phosphate for 60 minutes. The appropriate adsorption isotherm model in this study is the Freundlich isotherm model.
Universitas Diponegoro
2022-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/45076
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 1 (2022): March 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20777
2020-04-17T18:36:23Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
STUDI PEMBUATAN KOMPOS PADAT DARI SAMPAH DAUN KERING TPST UNDIP DENGAN VARIASI BAHAN MIKROORGANISME LOKAL (MOL) DAUN
Hadiwidodo, Mochtar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Sutrisno, Endro
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Handayani, Dwi Siwi
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Febriani, Masyitha Putri
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Array
Tempat Pengolahan Sampah Terpadu Universitas Diponegoro (TPST Undip) merupakan sarana pengelolaan sampah mandiri yang dibangun pada tahun 2015 oleh pihak institusi Universitas Diponegoro. TPST Undip melakukan kegiatan pengelolaan sampah mulai dari pengangkutan hingga pengolahan sampah untuk wilayah pelayanan yang mencakup seluruh area yang ada di kampus Undip. Pihak TPST Undip sudah melakukan upaya untuk mengolah timbulan sampah tersebut, yaitu dengan melakukan komposting untuk sampah organik biodegradable dan melakukan recycle untuk sampah anorganik. Pengomposan tersebut dilakukan selama 3 – 5 minggu dengan menggunakan bantuan aktivator EM4. Dalam penelitian ini, akan dibuat bioaktivator berupa larutan mikroorganisme lokal (MOL) dari berbagai macam daun yang mudah didapatkan di lingkungan sekitar kampus, seperti daun ketapang (Terminalia catappa), daun angsana (Pterocarpus indicus) dan daun mahoni (Switenia mahagony). Bioaktivator ini akan menggantikan aktivator komersial EM4 untuk digunakan dalam pengomposan sampah daun kering. Proses pengomposan dilakukan secara aerobik dengan bak bersekat dan dilakukan selama 28 hari. Hasilnya kandungan unsur hara makro yaitu COrganik, N-Total, dan K-Total dalam kompos ini telah memenuhi standar kualitas kompos di Indonesia yang diatur dalam SNI 19-7030-2004
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20777
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/47177
2023-01-04T09:30:50Z
presipitasi:RSA
"221130 2022 eng "
2550-0023
1907-817X
dc
Study of Rhizosphere Bacteria on the Coast of Mempawah Mangrove as Bioremediation Agents
Sulastri, Aini
Universitas Tanjungpura
Jumiati, Jumiati
Universitas Tanjungpura
Nugraheni, Putranty Widha
Universitas Tanjungpura http://orcid.org/0000-0001-5036-1478
Putra, Leonardus Sandy Ade
Universitas Tanjungpura
Kusumawardhani, Eka
Universitas Tanjungpura
Array
The production and accumulation of organic matter in the mangrove ecosystem allow this area to be rich in microbes and potentially develop as a source of various extracellular enzymes. This research aims to create effective microorganisms as bioremediation agents and determine the composition of the types of bacteria found in mangrove areas, sediments, leaf litter, stems, and mangrove plants. Sediment and vegetation were obtained as samples for being diluted and isolated, then spread onto media to get a single pure colony using Zobell 2216 method. The virgin territory formed is distinguished by characterization using macroscopic observations. It was found that the composition of bacteria isolated from the mangrove area contained 59 isolates with various visible characteristics consisting of 20 isolates of sedimentary bacteria, 27 isolates of bacteria on stems, and 12 isolates of bacteria derived from mangrove leaves. Bacterial isolates S08, B27, and D04 have the potential for the bioremediation of Hg metal. Bacterial isolates S58, B35, and D13 have potential for Pb bioremediation, while bacterial isolates S27, B35, and D12 have potential as Fe bioremediation agents.
Universitas Diponegoro
2022-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/47177
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 3 (2022): November 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/22858
2020-04-17T18:38:10Z
presipitasi:RSA
"190617 2019 eng "
2550-0023
1907-817X
dc
Pengaruh Variasi Gula Pasir Terhadap Waktu Pengomposan Ditinjau Dari Rasio C/N Pada Sampah Sayuran di Pasar Jati Banyumanik Dengan Penambahan Bioaktivator Lingkungan
Hadiwidodo, Mochtar
Universitas Diponegoro
Sutrisno, Endro
Universitas Diponegoro
Sabrina, Azzura
Universitas Diponegoro
Array
Sampah sayuran di Pasar Jati Banyumanik biasa dibuang tanpa dilakukan pemanfaatan dan pengolahan. Sampah sayuran dimanfaatkan sebagai bahan baku pengomposan karena memiliki kandungan karbon, nitrogen, fosfor dan kalium yang dibutuhkan oleh tanaman dan kesuburan tanah. Penelitian ini bertujuan untuk mengetahui pengaruh variasi gula pasir terhadap waktu pengomposan ditinjau dari rasio c/n pada sampah sayuran di Pasar Jati Banyumanik dengan penambahan bioaktivator lingkungan. Variasi gula pasir yang digunakan yaitu 0 gram, 20 gram, 30 gram, 40 gram, 50 gram, dan 60 gram. Proses pengomposan dilakukan selama 14 hari. Kompos yang diperoleh dianalisis suhu, pH, kadar air, C-Organik, N-Total, P-Total, K-Total, penyusutan kompos, warna dan bau. Hasil analisis dibandingkan dengan SNI 19-7030-2004. Analisis kompos dilakukan pada hari ke 0, 3, 7, 10, dan 14. Waktu kematangan kompos optimum ditinjau dari rasio c/n yang dapat dicapai kompos dengan variasi gula pasir sebanyak 40 gram pada reaktor G3. Seluruh parameter yang diuji telah memenuhi standar kompos matang SNI 19-7030-2004.
Universitas Diponegoro
2019-06-17 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/22858
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 1 (2019): Maret 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/52113
2023-04-09T04:36:46Z
presipitasi:RSA
"230330 2023 eng "
2550-0023
1907-817X
dc
Inventories of Methane Emission for Enteric and Decomposition Gasses from Cattle Manure and Its Mitigation Strategies
Devitriano, Dodi
Universitas Jambi
Syarifuddin, Hutwan
Universitas Jambi
Jalius, Jalius
Universitas Jambi
Wibowo, Yudha Gusti
Institut Teknologi Sumatera https://scholar.google.co.id/citations?user=rF1M_60AAAAJ&hl=id https://orcid.org/0000-0003-1013-7732
Array
Livestock is a significant contributor to global methane (CH4) emissions, accounting for 18% to 51% of total emissions worldwide. The purpose of this study is to estimate the CH4 emissions from livestock in Jambi Province, using the Tier-1 method recommended by the Intergovernmental Panel on Climate Change (IPCC). The results show that CH4 emissions range from 7,464,728 to 7,833,349 tons per year, with feces management contributing 160,261 to 166,667 tons per year, and buffalo enteric emissions contributing 2,511,135 to 2,616,185 tons per year. These findings highlight the significant impact of the livestock sector in Jambi Province on global warming. Moreover, this study presents a brief overview of mitigation strategies that can be implemented to reduce CH4 emissions from the livestock sector.
Universitas Diponegoro
2023-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/52113
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 1 (2023): March 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/25103
2020-08-31T06:24:03Z
presipitasi:RSA
"191130 2019 eng "
2550-0023
1907-817X
dc
Utilization of Clay and Bamboo Charcoal Biosorbent Composites in Reducing the Dyes Concentration in Batik Industry Wastewater
Tamyiz, Muchammad
Universitas Nahdlatul Ulama Sidoarjo http://orcid.org/0000-0001-6647-9286
Hidayah, Natasya Nur
Universitas Nahdlatul Ulama Sidoarjo
Salsabella, Aulianita
Universitas Nahdlatul Ulama Sidoarjo
Maulidiyah, Takrimatul
Universitas Nahdlatul Ulama Sidoarjo
Array
The batik industry in Indonesia is one of the small and medium business sectors (SMEs) which is a source of work for some people. The batik industry produces various kinds of liquid waste, one of which is dyes including remazol dyes. In this research, clay and bamboo charcoal which are activated by HCl 1 M were made into a composite biosorbent with a ratio of clay and bamboo charcoal (80%: 20%). In this study, two variables are used, namely dose and contact time variation. The results of removal efficiency for variable adsorbent doses and contact time respectively were 30.00% and 31.33%. FTIR spectrum analysis shows wave numbers 1338.64 and 1309.71 cm-1 which is the C-H bending region. The peak at wave number 1539.25 cm-1 with strong and tapered absorption is identified as aliphatic C-C strains which are functional groups of activated charcoal. The spectrum gives a clay-charcoal composite specification when the absorption peak at wave number 3462.34 cm-1 there is an interaction between O-H in clay and O-H in charcoal, causing an increase in absorption intensity. The use of clay and bamboo charcoal biosorbent can reduce levels of dyes in batik industry liquid waste.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/25103
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/56390
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
Effects of Rubber Factory Wastewater Sludge Compost on the Growth Parameters of Rubber Seedlings: A Nursery Study and Environmental Perspective
Maryani, Anis Tatik
Universitas Jambi
Hendra, Aves Dwi
Universitas Jambi
Fitriani, Miranti Sari
Universitas Jambi
Wibowo, Yudha Gusti
Institut Teknologi Sumatera https://scholar.google.co.id/citations?user=rF1M_60AAAAJ&hl=id https://orcid.org/0000-0003-1013-7732
Array
Conducted at the University of Jambi's Teaching and Research Farm in Mendalo Indah Village, this three-month study from September to November 2022 utilized a Completely Randomized Design (CRD) with a single variable: rubber factory wastewater sludge compost application. Five treatment levels were tested: a0 = 25 g NPKMg dose, a1 = 100 g rubber factory wastewater sludge compost + 20 g NPKMg dose, a2 = 200 g rubber factory wastewater sludge compost + 15 g NPKMg dose, a3 = 300 g rubber factory wastewater sludge compost + 10 g NPKMg dose, and a4 = 400 g rubber factory wastewater sludge compost + 5 g NPKMg dose. Statistical analysis, employing ANOVA and the Honestly Significant Difference (HSD) test, determined treatment effects at a 5% significance level. The study assessed various rubber plant growth parameters, such as live seedling percentage, shoot emergence, budded shoot height, leaf count, stem diameter, root count, shoot and root dry weight. Notably, the application of 400 g of rubber factory wastewater sludge compost significantly influenced plant growth, specifically enhancing shoot emergence, stem diameter growth, and budded shoot height.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/56390
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/29197
2020-08-31T05:28:29Z
presipitasi:RSA
"200331 2020 eng "
2550-0023
1907-817X
dc
Hazardous and Toxic Waste Management in Bhayangkara Hospital Tk. I Raden Said Sukanto
Clarisca, Vio Alma
Universitas Diponegoro
Samadikun, Budi Prasetyo
Universitas Diponegoro
Array
Rumah sakit adalah suatu objek yang memiliki peranan besar dalam menyumbang limbah medis, di mana limbah tersebut digolongkan sebagai limbah bahan berbahaya dan beracun (B3). Limbah B3 tersebut apabila tidak diolah dengan tepat akan membawa penyakit nosokomial bagi manusia dan membahayakan lingkungan. Untuk itu sangat diperlukan upaya pengelolaan limbah. Limbah medis yang dihasilkan oleh RS Bhayangkara Tk. I Raden Said Sukanto berasal dari ruang-ruang perawatan pasien dan ruangan penunjang medis. Hasil yang diperoleh yaitu jumlah timbulan limbah B3 medis pada Bulan Januari 2020 adalah 16.866 kg yang meliputi limbah infeksius, farmasi, kimia, dan benda tajam. RS Bhayangkara Tk. I Raden Said Sukanto telah melakukan upaya pengelolaan terhadap limbah B3 medis yang dihasilkannya dengan berpedoman pada peraturan pemerintah yang berlaku di Indonesia. Upaya tersebut terdiri atas kegiatan pengurangan, pewadahan, pelabelan dan simbol, penyimpanan, pengangkutan, dan pengolahan. Namun, pada kenyataannya masih terdapat beberapa ketidaksesuaian antara kondisi lapangan dengan peraturan. Hal ini dikarenakan minimnya sumber daya manusia yang memadai.
Universitas Diponegoro
2020-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/29197
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 1 (2020): Maret 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/30985
2020-12-17T04:40:26Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
The Corrosivity Level of Rawa Pening Downstream Surface Water in the Dry and Rainy Season
Purwono, Purwono
Institut Agama Islam Negeri Surakarta
Oktiawan, Wiharyanto
Universitas Diponegoro
Istirokhatun, Titik
Universitas Diponegoro
Nurfaiz, Agus
PT. Indonesia Power UP Mrica
Array
Korosi merupakan faktor penting yang dapat mempengaruhi kualitas air yang digunakan oleh manusia. Hal ini dapat berdampak pada kesehatan dan faktor ekonomi akibat kerusakan peralatan distribusi air tersebut. Tingkat korosifitas air permukaan sebagai air baku air minum menjadi penting untuk diteliti sebelum air tersebut masuk ke proses pengolahan maupun penggunaan lain seperti pembangkit listrik tenaga air (PLTA). Penelitian ini bertujuan untuk mengetahui tingkat korosifitas air permukaan rawa pening pada musim kemarau dan penghujan pada tahun 2018. Sampling air permukaan dilakukan di hilir rawa pening, kemudian dilakukan uji laboratorium terhadap parameter korosifitas air. Hasil penelitian menunjukkan bahwa air permukaan di hilir rawa pening tidak bersifat korosif dilihat dari parameter pH, suhu, TDS, dan Klorida. Nilai pH pada musim kemarau (J1) sebesar 7,00, sedangkan pada penghujan (J2) sebesar 7,77 dan bersifat tidak korosif. Nilai suhu sebesar 28,6oC dan 29,3oC masing-masing pada musim penghujan dan kemarau. Hasil pengukuran TDS pada musim kemarau lebih rendah dibanding musim penghujan dengan selisih 12 mg/l. Pada musim kemarau sebesar 141 mg/l dan musim penghujan sebesar 153 mg/l. Kenaikan ini kemungkinan berasal dari material geologi (geologic materials) seperti batuan dan tanah di sekitar danau rawa pening. Sumber TDS lainnya antara lain dari urban lands, road deicers, cultivated lands, dan pasture lands. Kegiatan manusia juga berdampak pada kenaikan TDS diperairan diantaranya kegiatan domestik (mandi dan cuci), perdagangan, dan industri. Kadar klorida sebesar 2,19 mg/l dan 3,19 mg/l. Penelitian ini memberi berimplikasi kepada pihak pengguna air danau rawa pening. Korosifitas air dipengaruhi juga oleh parameter mikrobiologi yang perlu diteliti lebih lanjut.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/30985
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34139
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Kusumawardani, Yustika
Universitas Pandanaran
Soehartono, Soehartono
Subekti, Sri
The development of the area around the river continues to increase in line with the pace of development to improve community welfare. Likewise, with small-scale motorized vehicle washing businesses that are widely located on the riverbank, if there is no processing, there is a concern that it will also pollute the river. One of the requirements for an effective wastewater treatment plant is minimal maintenance and costs and safe and easy operation. The cellulose content and hygroscopic ability of banana stems make banana stems usable as a porous medium. Based on previous research, banana stem filter media can reduce TSS concentration and detergent for motorized vehicle washing wastewater. This research uses descriptive quantitative research methods. The test variables were the concentrations of COD, TSS, and detergent. This study aims to design WWTP using banana stem filters and to determine the effectiveness of WWTP in reducing the test parameters. The analysis results show that the WWTP of banana stem filter media can be used to treat motorized vehicle washing wastewater with an average value of the effectiveness of reducing the overall test parameters by 51%. The percentage of the best reduction effectiveness was 77% in the TSS parameter on day 4. The average reduction effectiveness of each COD parameter was 48%, TSS 55%, and detergent was 51%.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34139
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/36673
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
Electrochemical Peroxidation Method for Reduction of Chemical Oxygen Demand (COD) Carbofuran in Furadan 3GR Pesticides
Wahyuni, Ayu Sri
Universitas Diponegoro https://orcid.org/0000-0002-2752-3018
Suhartana, Suhartana
Universitas Diponegoro https://orcid.org/0000-0003-1458-7335
Bima, Damar Nurwahyu
Universitas Diponegoro https://orcid.org/0000-0002-3793-8057
Array
Carbofuran is a pollutant compound derived from the pesticide Furadan 3GR which is widely used in agriculture. Various methods of carbofuran degradation have been carried out, one of which is the conventional electrochemical method. This study used an electrochemical peroxidation process to degrade Carbofuran in the pesticide Furadan 3GR. This study aims to determine the optimum conditions (time, Na2SO4 concentration, and volume addition of H2O2) for electrochemical peroxidation and to compare the effectiveness of electrochemical and electrochemical peroxidation methods by measuring the parameter of carbofuran COD reduction. The significance of the electrochemical peroxidation method and the conventional electrochemical method was compared as a preliminary test. The COD reduction of Carbofuran using traditional electrochemical methods and electrochemical peroxidation was 45.76% and 88.70%, respectively. Batch carbofuran electrochemical peroxidation process was accomplished to ascertain the optimum conditions under various operation times, the concentration of Na2SO4, and the additional volume of H2O2. The largest COD reduction of 93.78% was obtained at 10 minutes, 75 mM Na2SO4, and 2 mL H2O2. The UV-Vis spectrophotometric absorption of Carbofuran at a wavelength of 274 nm was significantly reduced from 1.377 to 0.131 at optimum conditions. The IR spectrum measurement results indicate a reduction in absorbance for the N-H group (3383 cm-1) and the C=O group (1643 cm-1) at optimum conditions. Overall, the electrochemical peroxidation process proved to be an appropriate technique for COD reduction of Carbofuran in Furadan 3GR pesticides.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/36673
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14719
2020-04-17T18:34:18Z
presipitasi:RSA
"170515 2017 eng "
2550-0023
1907-817X
dc
ANALISIS PENGARUH PENATAAN RUANG TERHADAP KINERJA PEMBANGUNAN WILAYAH DI KABUPATEN WAROPEN PAPUA INDONESIA
Ramandey, Lazarus
Universitas Cenderawasih
Array
Berbagai permasalahan penataan ruang di Kabupaten Waropen Papua menunjukkan bahwa Rencana Tata Ruang Wilayah (RTRW ) Kabupaten Waropen Papua yang disusun tahun 2012 belum memiliki kontribusi positif terhadap penyelesaian permasalahan tata ruang. Hal ini kemungkinan disebabkan karena terjadi inkonsistensi dalam penataan ruang. Penelitian ini mencoba untuk melihat konsistensi penataan ruang serta kaitannya dengan kinerja pembangunan wilayah. Metode yang digunakan untuk melihat konsistensi penyusunan RTRW dengan pedoman adalah analisis tabel pembandingan dilanjutkan dengan analisis logika verbal. Untuk mengetahui apakah penyusunan RTRW sudah memperhatikan kesinergian dengan wilayah sekitarnya (Inter-Regional Context) dilakukan map overlay dilanjutkan dengan analisis logika verbal. Untuk mengetahui kinerja perkembangan wilayah dilakukan Principal Components Analysis (PCA). Hasil analisis menunjukkan bahwa inkonsistensi dalam penataan ruang menyebabkan berbagai permasalahan yang berakibat pada menurunnya kinerja perkembangan wilayah. Masalah utama yang harus mendapatkan perhatian lebih adalah infrastruktur, pertumbuhan pembangunan, pertumbuhan ekonomi, aspek transportasi dan properti baru.
Universitas Diponegoro
2017-05-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/14719
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 1 (2017): Maret 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/42819
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
Analysis of Occupational Noise in Association with Blood Pressure Among Workers at Geothermal Power Plant
Muhyidin, Muhyidin
Universitas Indonesia
Nasri, Sjahrul Meizar
Universitas Indonesia
Array
The purpose of this study will analyze noise intensity at a geothermal power plant and its association with employees’ blood pressure and risk of hypertension. A cross-sectional survey using questionnaire as primary data; noise dosimeter, body mass index and blood pressure measurement records as secondary data. Total 101 workers participated by purposive sampling based on a similar exposure group (SEG). Mann-Whitney & χ2 test analysis was applied to examine the association of dependent variables and independent variables. Noise intensity was measured from the noise dose result during 8 working hours. Subjects with noise dose >80 dBA had higher levels of SBP / systolic blood pressure (119.1±11.2 mmHg) and DBP / diastolic blood pressure (75.6±5.3) than subjects with noise dose ≤80 dBA (SBP: 117.9±6.6 mmHg, DBP: 75.0±5.1). The hypertension prevalence was 7.9% at participants with noise dose >80 dBA and 2.6% in noise dose ≤80 dBA. The odds ratio (OR) of noise dose >80 dBA (OR = 3.190, 95% CI = 0.358-28.394), and smoking (OR = 2.469, 95% CI = 0.416-14.645). Noise intensity was not associated with SBP (p-value = 0.664), DBP (p-value = 0.538), and hypertension (p-value = 0.405). This study was the pioneer in the geothermal industry with noise dosimetry measurement. Further comprehensive studies need to be conducted to confirm the association between noise intensity and blood pressure and the risk of hypertension.
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/42819
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/17984
2020-04-17T18:35:53Z
presipitasi:RSA
"180329 2018 eng "
2550-0023
1907-817X
dc
Pemodelan Beban Pencemar Non-Point Source Sungai Premulung Segmen Kota Surakarta
Rezagama, Arya
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
N, Arief Laila
Departemen Teknik Geodesi, Fakultas Teknik, Universitas Diponegoro
A, Affifah Nadya
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Setiawati, Lia
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Sungai Premulung Kota Surakarta mendapatkan beban pencemaran dari sumber pencemaran tidak terpusat seperti limbah domestik dan limbah UKM limbah batik. Kualitas air sangat di pengaruhi oleh kondisi daerah aliran sungai di mana penelitian hubungan antara tata guna lahan dan kualitas sungai masih jarang di aplikasikan di Indonesia. Penelitian ini bertujuan untuk mengenalisa besaran beban pencemaran serta membandingkan secara spasial antara wilayah DAS premulung segmen Kota Surakarta. Survei kualitas air dilakukan dengan melakukan sampling 10 titik sepanjang sungai. Analisa spasial penggunaan lahan hasil dijitasi GIS citra Surakarta diolah dalam model BASIN-PLOAD. Berdasarkan hasil uji laboratorium nilai COD, Nitart, Fosfat maupun tembaga, hampir keseluruhan segmen sungai masih dibawah baku mutu Kelas IV menurut PP no. 82 tahun 2001. Hasil model munjukkan penataan ruang memiliki korelasi yang sangat erat terhadap jumlah beban pencemaran yang masuk menuju sungai. Beban pencemar sumber bukan terpusat akan berhubungan lurus dengan luas wilayah dan area terbagun. Kelurahan Pajang Kecamatan Laweyan memempati urutan teratas dalam jumlah sumber pencemar dengan nilai 95 kg/tahun untuk CU, 1.097 kg/tahun untuk phosphat, 534 kg/tahun untuk nitrat dan 2.042 kg/tahun untuk COD kemudian diikuti Kelurahan Sondakan, Karangasem, dan Purwosari. Prioritas pengelolaan lingkungan Kota Surakarta dapat dibuat berdasarkan nilai beban pencemarannya.
Universitas Diponegoro
2018-03-29 12:24:08
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/17984
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 1 (2018): Maret 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/46959
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
The Effect of Sustainable Livelihoods on the COVID-19 Disaster Recovery in Agrotourism
Wulandari, Verlina Intan
Universitas Brawijaya
Sholihah, Qomariyatus
Universitas Brawijaya
Parmawati, Rita
Universitas Brawijaya
Array
Kebun Belimbing Ngringinrejo is the leading agrotourism in Bojonegoro Regency. COVID-19 pandemic has decreased a numeral of tourist visits which caused agrotourism income to decline, business actors, to lose their jobs, and the livelihoods of starfruit farmers to be threatened. After the COVID-19 vaccination, the re-opening of agrotourism began with the application of health protocols. Agrotourism must carry out a recovery process to return to normality. The study aims to determine the condition of sustainable livelihoods for star fruit farmers and business actors and the effect of livelihood assets on disaster recovery. This research was conducted so that agrotourism can recover immediately by optimizing high assets and improving low assets. This study used the descriptive statistic and analysis of SEM-PLS. The outcome indicated that the condition of sustainable livelihoods for starfruit farmers and business actors has a high natural, social, and physical assets. At the same time, low assets are human and financial assets. Four sustainable livelihood assets are human, natural, social, and physical, significantly influencing disaster recovery. In contrast, financial assets have no significant impact on disaster recovery. The most significant indicators for the disaster recovery process in agrotourism are developing digital solutions, and the lowest indicator is designing risk communication.
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/46959
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20816
2020-04-17T18:37:32Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
APLIKASI BOX MODEL SEDERHANA UNTUK ESTIMASI KONSENTRASI POLUTAN BLACK CARBON DI ATMOSFER
Huboyo, Haryono Setiyo
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Samadikun, Budi Prasetyo
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Array
Box Model adalah salah satu pemodelan kualitas udara yang menggunakan formulasi matematis parameter-parameter yang mempengaruhi konsentrasi polutan di udara yaitu berupa arah dan kecepatan angin, serta ketinggian. Black carbon adalah komponen utama jelaga dan dihasilkan dari pembakaran bahan bakar fosil dan biomassa yang tidak sempurna serta memiliki dampak pemanasan pada iklim 460-1500 kali lebih kuat dari CO2. Tujuan dari penelitian ini adalah untuk mengetahui estimasi konsentrasi polutan black carbon di atmosfer dengan menggunakan pemodelan Box Model. Pengukuran PM2.5 menggunakan HVAS (High Volume Air Sampler) dengan metode gravimetri kemudian pengujian black carbon pada PM2,5 menggunakan metode reflektansi dengan menggunakan EEL Smokestain Reflectometer, kemudian melakukan perhitungan estimasi black carbon dengan box model. Pengambilan sampel dilakukan pada lima titik yang tersebar di kota Semarang sebanyak tiga kali pengukuran. Hasil penelitian didapatkan bahwa rata-rata perhitungan estimasi black carbon menggunakan box model tidak jauh berbeda atau relatif sama dengan rata-rata hasil pengujian black carbon yang didapatkan dari sampel pengukuran di lapangan
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20816
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/50720
2023-01-04T09:30:50Z
presipitasi:RSA
"221130 2022 eng "
2550-0023
1907-817X
dc
The Moisture Content of Sawdust Fuel Pellets at Different Drying Periods
Junaidi, Junaidi
Universitas Diponegoro
Pusparizkita, Yustina Metanoia
Universitas Diponegoro
Juliatiko, Attaya
Universitas Diponegoro
Rahmadiputra, Ngakan Ade
Universitas Diponegoro
Sudarno, Sudarno
Universitas Diponegoro
Array
The development of pellet fuel from biomass has a great opportunity because Indonesia is an agricultural country. Utilizing this biomass can increase economic value, minimize waste generated, and reduce emissions released into the environment. In this study, the pellet fuel was made from sawdust obtained from the Semarang wood sawmill industry. The raw materials are mixed with adhesive, water and then formed using a pellet machine. The high water content in the pellets that have just come out of the pelletizing (27%) process requires drying treatment. The aim of this work was to find out the effect of drying time on the moisture content of the pellet fuel to meet existing standards. The variation of drying time used is 10, 15 and 20 minutes at 100° C. The results showed that the moisture content of the pellet was 22% (10 min), 19% (15 min) and 17% (20 min). The water content in the pellets will decrease 4% on average along with the drying time. However, the water content was still slightly higher than the specified standard (8-13%). Based on model predictions, the necessary drying time is 30-35 min. Ash content obtained from this study is 0.7%. The drying time can affect the density of the resulting pellet product. Accordingly, further studies are needed to determine the drying optimum temperature.
Universitas Diponegoro
2022-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/50720
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 3 (2022): November 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/23606
2020-08-31T06:23:58Z
presipitasi:RSA
"191107 2019 eng "
2550-0023
1907-817X
dc
Evapotranspiration of Indonesia Tropical Area
Marganingrum, Dyah
Indonesian Institute of Sciences http://www.geotek.lipi.go.id
Santoso, Heru
Indonesian Institute of Sciences http://www.geotek.lipi.go.id
Array
Indonesia is an archipelago country with a tropical climate. The region of Indonesia is quite large and located between two continents (Asia and Australia) and between two oceans (Indian and Pacific), making the territory of Indonesia has a unique climate pattern. One of the climate variables that quite important to be studied in this chapter is evapotranspiration. The Thornthwaite method was used to estimate potential evapotranspiration based on average air temperature. The relationships between evapotranspiration, precipitation, and elevation were then examined. Besides, temperature variations that affect climate patterns between monsoonal and equatorial regions were compared, between the mainland and small islands, and between mountain and coastal area. The impact of global warming was also examined on the climate and potential evapotranspiration of the Indonesian region. Data analysis showed that evapotranspiration correlates weakly with precipitation, and the contrary, the evapotranspiration correlates strongly with elevation, with correlation indices of 0.02 and 0.89, respectively. The study confirmed that air temperature is the primary controlling variable of the evapotranspiration in this very heterogeneous landscape. Under a global temperature increase of 1.5 °C above the pre-industrialized year (1765), the evapotranspiration is expected to increase in a range from 4.8 to 11.1%. In general, the excess of water to restore soil moisture in the future tends to decrease, i.e., drier.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/23606
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/24693
2020-08-31T05:28:29Z
presipitasi:RSA
"200331 2020 eng "
2550-0023
1907-817X
dc
Study of Sea Water Quality Around the Jelitik River Estuary, Sungailiat Subdistrict - Bangka Regency
Wibowo, Mardi
Badan Pengkajian dan Penerapan Teknologi http://orcid.org/0000-0003-3591-8631
Rachman, Reno Arief
Badan Pengkajian dan Penerapan Teknologi
Array
Jelitik River is the main river and economic artery of Sungailiat District, Bangka Regency. Currently around the Jelitik River there is a Jelitik Fishing Port and is developed as an industrial area. In addition to the problems of sedimentation problems with the development of industrial estates and the presence of sand mining rich in tin ore on land and on the high seas it is feared that it will reduce the quality of the environment, especially the surrounding sea water. Therefore, this study is needed in order to find out the quality of waters in this estuary which can be used as a basis or baseline for the initial environment of this region if later this area will be developed as a port or industrial area. The method used in this study is field observation, water sampling, and laboratory analysis. Therefore, as an initial step, it is necessary to identify the quality of the waters in this estuary which can be used as the basis or initial environmental baseline of this area if later this area will be developed as a port or industrial area. Based on observations in the field of laboratory analysis of water samples, generally the quality of seawater around the estuary of Jelitik River still meets seawater quality standards both for port activities, marine tourism and for biota. Some parameters that exceed the quality standard include total suspended solid (TSS) which reaches 250 mg/l, total dissolved solids (TDS) which reaches 24,700 mg/l and nitrate content which reaches 0.38 mg/l. BOD value is 4.7 mg / l and COD is 46.4 mg / l, these parameters are still below the existing sea water quality standard.
Universitas Diponegoro
2020-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24693
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 1 (2020): Maret 2020
eng
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/29474
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Determination of Reaeration Coefficient of Bedadung Hilir River Oxygen Deficit Change Method (Case Study in Balung District, Jember
Wahyuningsih, Sri
Universitas Jember
Dharmawan, Agus
Universitas Jember http://orcid.org/0000-0002-5183-7172
Imamah, Imamah
Universitas Jember
Array
Oksigen terlarut (DO) merupakan parameter yang menentukan kesehatan perairan sungai. Suplai oksigen terlarut di perairan harus dapat terjaga untuk menunjang kehidupan organisme air. Suplai oksigen terlarut diperoleh dari pertukaran oksigen dari atmosfer ke badan air. Tujuan penelitian ini adalah untuk mengetahui besar koefisien reaerasi (penambahan oksigen) Sungai Bedadung bagian hilir menggunakan pendekatan perubahan DO. Pendekatan ini menggunakan model laju transfer massa oksigen dari atmosfer ke badan air. Data primer diperoleh dari pengukuran profil hidraulik, temperatur, dan DO sungai di tiga titik pantau Sungai Bedadung bagian hilir segmen Kecamatan Balung, Kabupaten Jember. Hasil menunjukkan nilai KR di tiga titik pantau masing-masing 36,084; 47,397; dan 83.114/hari dan cenderung naik. Besar KR ditentukan dari defisit oksigen dan waktu tempuh pengaliran air sungai. Rata-rata nilai KR Sungai Bedadung adalah 55,532/hari. Nilai KR yang tinggi menunjukkan kemampuan sungai yang mampu mensuplai oksigen secara alami.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/29474
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34306
2020-12-17T04:40:32Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Compost Solid-phase Microbial Fuel Cell (CSMFC) Performance using Graphene and Graphite as Electrodes
Putri, Soraya Annisa
Universitas Diponegoro
Confera, Akbar Nugroho
Universitas Diponegoro
Syafrudin, Syafrudin
Universitas Diponegoro
Ramadan, Bimastyaji Surya
Universitas Diponegoro
Array
Organic waste is a type of waste produced by many sector, which need to managed appropriately. During its development, composting is one of the organic waste management efforts that is often be applied, Another alternative organic waste management in the form of Microbial Fuel Cell (MFC) has emerged. Several researchers conducted studies on MFC performance which was influenced by many factors, especially the electrode which contributes to the electron transfer process. This study has a concern about energy optimization through CSMFC technology using different electrode’s material. Electrode materials from Graphene and Graphit has good electro-conductivity and has a large surface area, making it suitable for bacteria to adhere. The sampled reactors are consists of two types of electrodes in the form of graphite and graphene. Each materials has anode and cathode ratio of 1:1, 2:1, and 3:1. The samples measured into three kinds, which called a mature compost measurement, electrochemical measurement, and biochemical measurement. Some collected sampling data were then processed and analyzed statistically using SPSS software. The processed and analyzed data included the calculation of power density, total N, C/N ratio, and moisture content. Any data like voltage (V) and electric current (I) are needed to obtain a power density. The highest average voltage, current, power and power density are produced by the N3 reactor (graphene 3:1) that is 269 x 10-3 V, 163 x 10-6 A, 56 x 10-6 Watt and 1.914 x 10-3 W / m2. There is no significant effect of variations in the type of electrode (graphite and graphene) on CSMFC performances.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34306
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
eng
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/36490
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Decontamination of Mercury from Mined Soil using Magnetite Functionalized Quaternary Ammonium Silica (Fe3O4/SAK)
Ngatijo, Ngatijo
Universitas Jambi http://orcid.org/0000-0002-0921-7471
Permatasari, Defia Indah
Universitas Jambi
Farid, Faizar
Universitas Jambi
Bemis, Restina
Universitas Jambi
Heriyanti, Heriyanti
Universitas Jambi
Basuki, Rahmat
Universitas Pertahanan RI http://orcid.org/0000-0002-3117-2740
Wibowo, Yudha Gusti
Universitas Diponegoro
Array
Artisanal small-scale gold mining (ASCGM) has caused mercury contamination. However, efforts to decontaminate mercury from the ex-mining soils are still rare. This study aims to synthesize quaternary ammonium silica functionalized magnetite (Fe3O4/SAK) as a low price, highly available, and quickly separated adsorbent for mercury decontamination from ex-mining soils samples. The synthesis of Fe3O4/SAK and the mercury decontamination process was carried out by the co-precipitation and batch type reactor procedure, respectively. The Fourier Transform-Infra Red (FT-IR) characterization of synthesized Fe3O4/SAK informed the appearance of siloxane, silanol, methyl, methylene, and Fe-O functional groups. Crystal analysis by X-Ray Diffraction (XRD) showed that the typical peaks of SiO2 and Fe3O4 were emerged at 2θ 22.8˚ and 35.52˚, respectively. Morphological studies and elemental analysis using Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX) indicated the successful functionalization Fe3O4 by SAK in the transformation of surface morphology and composition of the main elements, namely C, O, Si, and Fe. The results of characterization using Surface Area Analyzer (SAA) showed that the surface area and pore diameters were 224.98 m2/g and 36.149-38.70 Å, respectively. The optimum results for adsorbing Hg22+ metal ions were obtained at pH 4.0, and the adsorbent mass was 0.1 g. The Fe3O4/SAK has been proven to be an easily separable adsorbent after the mercury decontamination process in ex-mining soil samples with an adsorption efficiency of 43.36% (0.722 mg/g).
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/36490
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/12489
2020-04-17T18:33:34Z
presipitasi:RSA
"161029 2016 eng "
2550-0023
1907-817X
dc
PENGARUH PENGENCERAN DAN PENGADUKAN TERHADAP PRODUKSI BIOGAS PADA ANAEROBIC DIGESTION DENGAN MENGGUNAKAN EKSTRAK RUMEN SAPI SEBAGAI STARTER DAN LIMBAH DAPUR SEBAGAI SUBSTRAT
R, Mohammad
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Soeroso, F
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Pradana, Sahid Akbar
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Utomo, Sudarno
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Wardhana, Irawan Wisnu
Departemen Teknik Ligkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Array
Kandungan organik pada limbah padat dapur dapat menjadi sumber substrat bagi bakteri anaerobik, yang akan menghasilkan biogas sehingga dapat menjadi sumber energi alternatif dan terbarukan. Limbah padat domestik dari dua restoran di sekitar Tembalang dijadikan sampel bagi penelitian ini. Pencacahan manual dan proses penggilingan (blender) dilakukan sebelum limbah padat domestik dimasukkan kedalam reaktor dengan volume 300 ml. Air
ditambahkan ke masing masing reaktor dengan volume yang berbeda beda untuk memperoleh faktor pengenceran. 1,1; 1,25; 1,42; 1,67 dan 2,00. Ekstrak rumen sapi digunakan sebagai starter bakteri. Temperatur, pH serta volume biogas dimonitor setiap hari selama kurang lebih 3 minggu. Faktor pengenceran dua kali dapat meningkatkan produksi biogas yang lebih banyak dibanding pada reaktor dengan pengenceran substrate lebih rendah. Selain itu pengenceran
juga mempercepat produksi dari biogas. Perlakuan pengadukan untuk meningkatkan produksi biogas, tidak teramati pada semua reaktor. Justru reaktor menghasilkan biogas yang lebih rendah ketika dilaukan pengadukan
Universitas Diponegoro
2016-10-29 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/12489
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 13, No 2 (2016): September 2016
eng
Copyright (c) 2016 Jurnal Presipitasi
oai:ojs.ejournal.undip.ac.id:article/41585
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
The Effect of Manganese Greensand Addition on Tray Aerator to Reduce COD Levels of Laundry’s Wastewater
Nugroho, Naufal Adi
Diponegoro University
Sulistiyani, Sulistiyani
Diponegoro University
Dewanti, Nikie Astorina Yunita
Diponegoro University
Array
COD level of Pojok Laundry’s wastewater did not meet the quality standard regulated in the Special Region of Yogyakarta Regulation No. 7 of 2016 (>150 mg/l) which was 442.5mg/l. This study was aimed to decrease COD levels using the tray aerator method. Manganese greensand with a diameter of 0.25 mm and a thickness of 2.4 cm/tray was also added. This type of research was a quasi-experimental with Nonequivalent Control Group Design. The sample in this study amounted to 50 samples with 5 treatments (30, 45, 60, 75, and 90 minutes), and 5 repetitions. Samples were taken from the washing machine outlet pipe. There were two groups, where the control group was only given aeration and the treatment group was given aeration with the addition of manganese greensand. Data analysis using the two-way ANOVA test showed that there was an effect of time variations on the decrease in COD levels (p<0.05), there was a difference in the average of decreased levels of COD between the control and treatment groups (p<0.05). The average decrease in COD levels after treatment with a time of 30, 45, 60, 75, and 90 minutes, respectively, was 195.7 mg/l (28.80%); 299.0 mg/l (43.63%); 372.1 mg/l (54.79%); 438.3 mg/l (64.61%); and 513.8 mg/l (75.45%). The decrease in COD levels increased with time. The conclusion of this research was that tray aerator with manganese greensand addition can reduce COD levels with the highest reduction up to 76.69% (90 minutes treatment, detergent usage: 30 g).
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/41585
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/16385
2020-04-17T18:35:17Z
presipitasi:RSA
"180329 2018 eng "
2550-0023
1907-817X
dc
Efektivitas Teknik Biofiltrasi Dengan Media Sarang Tawon Terhadap Penurunan Kadar Nitrogen Total Limbah Cair
Sali, Gea Paramudhita
Departemen Kimia, Fakultas MIPA, Universitas Jenderal Achmad Yani
Suprabawati, Anggi
Departemen Kimia, Fakultas MIPA, Universitas Jenderal Achmad Yani
Purwanto, Yuli
Divisi Pengujian, PT Superintending Company of Indonesia
Array
Berdasarkan regulasi PERMEN LH No. 5 Tahun 2014 Lampiran XLVII yang mengatur bahwa setiap limbah cair industri harus memenuhi baku mutu yang dipersyaratkan, maka telah dilakukan penelitian dalam upaya untuk memperoleh suatu sistem pengolahan air limbah yang cukup sederhana yang dapat diterapkan di industri-industri kecil. Penelitian dilaksanakan dengan melakukan pengolahan limbah yang mengandung nitrat (NO3), nitrit (NO2), dan ammonia (NH3) dengan menerapkan sistem nitrifikasi biologis yang menggunakan reaktor biofilter tercelup menggunakan media sarang tawon. Pemilihan sistem ini karena telah diketahui cara biologis adalah cara yang paling ekonomis dan reaktor biofilter tercelup merupakan sistem yang mudah dioperasikan dengan hasil yang cukup maksimal. Hasil penelitian diperoleh efektivitas penurunan kadar nitrit (NO2) sebesar 97,23%, kadar ammonia (NH3) sebesar 85,80%, kadar N-total sebesar 43,65% dan kenaikan kadar nitrat (NO3) sebesar 21,92%, dengan waktu tinggal optimal selama 6-7 hari. Hal ini terjadi karena adanya bakteri pengurai yang melekat pada media sarang tawon yang dapat merombak senyawa-senyawa nitrogen.
Universitas Diponegoro
2018-03-29 12:24:08
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/16385
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 1 (2018): Maret 2018
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/16385/39849
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/47024
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
Assessing Occupational Noise Exposure and Blood Pressure of Cabin Personnel of an Indonesian Diesel Train
Budiawan, Wiwik
Universitas Diponegoro https://orcid.org/0000-0003-1568-476X
Andarani, Pertiwi
Universitas Diponegoro https://orcid.org/0000-0002-6328-4579
Agiasti, Lare Demetria
PT Sinergi Enviro Nusantara
Array
Noise may cause serious health problems, including physiological responses, specifically in the cardiovascular system. This study aims to assess occupational noise exposure and analyze the correlation between occupational noise and blood pressure in cabin and station personnel. The participants were 30 cabin personnel (train drivers) and 30 station personnel. The cabin had a Leq of 90.3 dBA while the noise level at Poncol Station was still below the threshold limit value (TLV), i.e., 75.8 dBA. The noise exposure assessment also included noise exposure profiling. The Chi-square test showed that noise influenced systolic and diastolic blood pressure changes. Furthermore, for train drivers, the t-test showed a difference in systolic and diastolic between before and after the activity. As for station personnel, there was a difference in systolic, but contrarily it was not the case in diastolic. According to the noise profile, the train whistle had the most significant noise level at 120 dBA. Moreover, the use of a train whistle regularly may raise the noise level exposure to cabin staff and even station workers. This study contributes to scientific evidence that occupational noise might affect blood pressure
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/47024
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20786
2020-04-17T18:36:46Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
STUDI PENGELOLAAN SAMPAH PLASTIK DI PANTAI KUTA SEBAGAI BAHAN BAKAR MINYAK
Wedayani, Ni Made
Magister Perencanaan Pembangunan Wilayah Dan Pengelolaan Lingkungan (P2WL) Universitas Mahasaraswati, Jl. Soka No.47, Kesiman Kertalangu, Denpasar Timur, Kota Denpasar, Bali, Indonesia 80237
Array
Sampah plastik merupakan salah satu indikator pencemar pantai, terlebih pada musim tertentu sampah plastik di lautan akan singgah ke tepi pantai sehingga mengganggu fungsi pantai sebagai tempat rekreasi. Permasalahan sampah ini juga menjadi masalah bagi sebagian pantai di Bali termsuk Pantai Kuta. Sebagai salah satu ikon wisata Bali sudah seharusnya Pantai kuta terbebas dari sampah plastik, sehingga pengolahan sampah plastik dirasa perlu untuk diusahakan. Adapun alternatif penanganan sampah plastik yang saat ini banyak diteliti dan dikembangkan adalah mengubah sampah plastik menjadi bahan bakar. Mengubah sampah plastik menjadi bahan bakar minyak dapat dilakukan dengan proses cracking. Ada tiga macam proses yaitu hydro cracking, thermal cracking dan catalytic cracking. Bahan bakar dihasilkan dari cracking sampah plastik tergantung pada jenis plastik, proses retak yang digunakan, katalis jenis, suhu pyrolisis dan suhu kondensor. Bahan bakar dari sampah plastik ini diharapkan dapat mensubstitusi bahan bakar solar. Selain diubah menjadi bahan bakar, plastik juga dapat diolah menjadi bahan pembuat karbon aktif
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20786
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/15576
2017-08-11T16:38:38Z
presipitasi:RSA
oai:ojs.ejournal.undip.ac.id:article/24170
2020-04-17T18:38:47Z
presipitasi:RSA
"190731 2019 eng "
2550-0023
1907-817X
dc
Prioritas Penentuan Peningkatan Kualitas Lingkungan Permukiman Kumuh yang Berkelanjutan
Mutaqin, Zenal
Universitas Lampung
Persada, Citra
Universitas Lampung
Suroso, Erdi
Universitas Lampung
Array
The enhancement of environmental quality for urban settlement in Palembang is expected to be sustainable due to the increase number of slum areas and the limited funding allocation for the infrastructure establishment. This study aimed to determine priority scale of activities and locations according to three pillars of sustainable development which can alleviate slum areas i.e. physical environment, social and economic aspects by involving all stakeholders. This research will provide information for the local government to determine priority activities and locations for settlement improvement by using Analytical Hierarchy Process (AHP). The study revealed that the main factor to improve the environmental quality for settlement in 29 Ilir sub-district was the infrastructure development with urgency level reaching 46.7%. Meanwhile, the urgency level of social activity factor was approximately 31.2% followed by the economic development factor which was the lowest level by 22.1%. However, the highest priority level from those activity factors was household waste management by 100%, while other priority activities that should be done consecutively were waste infrastructure (93.5%), community service activities (83,6%), environmental drainage (66.2%), sanitation (66.1%), business capital loans (63%), training and entrepreneurship (61%), and compensation for the poor (57,9 %). The aforementioned activities were conducted in priority locations in which environmental quality was relatively poor.
Universitas Diponegoro
2019-07-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24170
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 2 (2019): Juli 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/54459
2023-08-18T09:24:32Z
presipitasi:RSA
"230730 2023 eng "
2550-0023
1907-817X
dc
Bioconversion of Black Soldier Fly (BSF) from Organic Waste Composting into Biodiesel Assisted by Whole Cell Microbial Lipase Biocatalyst through Direct Transesterification Process
Ningrum, Sari Sekar
Universitas Jayabaya
Zulaika, Aidha
Universitas Ibn Khaldun
Hanif S, Briantama
Universitas Jayabaya
Ayu Dinda, Dewa
Universitas Jayabaya
Array
Black Soldier Fly or Hermetia Illucens (BSF) is known for its potential as a biological agent that helps in the process of natural conversion of organic waste. Resulting compost and a large number of BSF colonies, potentially to be use as a non-food raw material in bioenergy production. The Method is BSF conversion experiment by direct transesterification reaction using Lab-scale bioreactor in 100ml three bottle neck flasks, the solution mixture consists of BSF powder, immobilized whole cell biocatalyst, and solvent. The Result is although in appearance the structure of the test mixture solution did not show an oily character, but based on the viscosity and density test, the test solution had density value 0.81 g/cm3 and viscosity value 1,024 mm2 /s which are above the value of the viscosity and density of methanol but still below the value of the viscosity and density of both SNI and EN14214 biodiesel standard, this could be due to insufficient separation or reaction, imperfect condition, and impurities that are still present in biodiesel products. It can be concluded that a transesterification reaction has occurred in this trial, however further analysis and more experiments are required to definitely conclude the changes in biodiesel production.
Universitas Diponegoro
2023-08-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/54459
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 2 (2023): July 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/58131
2024-02-27T06:02:48Z
presipitasi:RSA
"231115 2023 eng "
2550-0023
1907-817X
dc
Life Cycle Assessment to Compare the Environmental of Food Waste Management System in Semarang City
Qadar, Syahrul Al
Universitas Diponegoro
Budihardjo, Mochamad Arief
Universitas Diponegoro
Priyambada, Ika Bagus
Universitas Diponegoro
Array
1.3 billion tons of the food produced for human consumption is wasted in the food supply chain as a result of a number of issues. A high proportion of food waste occurs during consumption, primarily influenced by consumer behavior. In Semarang City, Black Soldier Fly, incineration, and composting are alternatives to food waste management. This research aims to analyze alternative food waste management methods that yield reusable resources and materials because currently unknown which method has the smallest environmental impact. Life Cycle Assessment method can be used to examine the environmental impact of the food waste management system from every phase 1 ton food waste analyze. BSF has proven superior to composting, incineration and landfilling methods in analyzes of potential environmental impacts that reduce 90% environmental impact. Landfills cover a large area and the effect of global warming is significant until of 1.704E+03 CO2-eq, this issue needs more attention in the management of the generated CH4. Incineration needs to make advances in the method such as producing new resources and emissions so that can be reused because incineration impact eutrophication potential until 2.438E+00 . For reasons environmental concerns, efficient food waste management is crucial to realizing the Sustainable Development Goals.
Universitas Diponegoro
2023-11-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/58131
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Article in Press 2024
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/28585
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Analysis of Environmental Capacity (Water Pollution Load) in the Porong Area, Sidoarjo Regency, ex Lapindo Mining
Auvaria, Shinfi Wazna
Universitas Islam Negeri Sunan Ampel Surabaya http://orcid.org/0000-0002-0102-0789
Munfarida, Ida
Universitas Islam Negeri Sunan Ampel Surabaya
Array
Semburan lumpur Sidoarjo yang terjadi pada tahun 2006 di dekat area perumahan menyebabkan kerusakan lingkungan sekitar, baik secara fisik maupun material. Selain itu, dampak sekunder yang diakibatkan oleh adanya lumpur Sidoarjo dapat menambah beban lingkungan. Apabila dalam suatu wilayah terdeteksi melebihi daya tampung lingkungan dan ambang batas yang dapat dipulihkan maka akan berakibat pada kerusakan lingkungan permanen. Tujuan penelitian ini adalah mengevaluasi daya tampung lingkungan kawasan Kecamatan Porong Kabupaten Sidoarjo sebagai akibat dari letusan lumpur Sidoarjo ex. penambangan Lapindo melalui pendekatan daya tampung beban pencemaran air. Berdasarkan penelitian, didapatkan hasil bahwa pada umumnya parameter telah melebihi batas baku mutu kelas II sesuai PP No.82/2001 yaitu parameter total dissolved solids (TDS) dan chemical oxygen demand (COD) di titik 4, biological oxygen demand (BOD), klorida dan ammonia di semua titik, besi dan nitrit di titik 1, fosfat di titik 1,3-4 dan mangan di titik 2. Parameter TDS, BOD, COD di titik 4, Klorida, Nitrit di titik 1, amonia, fosfat di titik 1 dan 3, dan Mangan di titik 2 diketahui telah melebihi daya tampung lingkungan. Rekomendasi yang diberikan untuk meningkatkan kualitas sungai diantaranya pengelolaan air limbah, mengurangi pelepasan polutan ke sungai, dan menerapkan bioteknologi untuk mengurangi polusi air sungai.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/28585
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/32664
2020-12-17T04:32:57Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Hydroponic Effectiveness of Kana Flower, Apu Wood and Coffee Grounds in Domestic Greywater Wastewater Treatment
Nurhidayanti, Nisa
Universitas Pelita Bangsa
Ardiatma, Dodit
Universitas Pelita Bangsa
Array
Universitas Pelita Bangsa merupakan salah satu perguruan tinggi swasta di Kabupaten Bekasi yang sedang berkembang dengan jumlah mahasiswa yang selalu meningkat setiap tahunnya. Permasalahan jumlah mahasiswa yang semakin meningkat ini menyebabkan air limbah domestik yang dihasilkan juga semakin meningkat. Tujuan dari penelitian ini yaitu untuk mengetahui efektivitas hidroponik tanaman Bunga Kana dan Kayu Apu serta ampas kopi dalam menurunkan BOD, TSS, Minyak dan Lemak limbah greywater domestik. Tahapan metode penelitian dimulai dengan pembuatan arang aktif dari ampas kopi, pengambilan sampel air limbah, pengujian air limbah, aklimatisasi tanaman, range finding test, uji fitoreaktor dengan filter karbon aktif, dan dilanjutkan dengan analisa data. Hasil Pengujian parameter limbah greywater domestik dengan filter karbon aktif dari ampas kopi selama tujuh hari didapatkan nilai akhir TSS <2,5 mg/L, BOD 23 mg/L, Minyak dan Lemak sebesar <0,1 mg/L, pH 7,61 dan TDS sebesar 286 ppm. Hasil Pengujian tersebut telah memenuhi baku mutu air limbah domestik sesuai Peraturan Menteri Lingkungan Hidup dan Kehutanan Republik Indonesia Nomor 68 tahun 2016. Berdasarkan hasil penelitian diperoleh efektivitas penurunan konsentrasi beberapa parameter dari proses fitoremediasi dengan filter karbon aktif dari ampas kopi yaitu penurunan TSS 98,20 %, BOD 76,04 %, minyak dan lemak 0%, pH 0,39% dan TDS 29,03%.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/32664
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/32664/96332
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/35020
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
GWP, AP, and EP Contribution on Potential Improving Scenarios of Domestic SWM in Padang City: A Review
Wulandari, Suci
Universitas Andalas
Raharjo, Slamet
Universitas Andalas
Array
The increase in solid waste generation is incompatible with solid waste management (SWM). Padang city have a small processing percentage of 5% through composting and recyling. Improper and nonoptimal SWM lead to many obstacles including climate change, water and soil contamination, to creatures life disturbance. By conducting Impact Assessment and Contribution Analysis, this study examines the most impact contributor of unit processes in four scenarios of domestic solid waste management in Padang City. Scenario 0 presents the existing condition; scenarios 1, 2, and 3 present the improvement of Scenario 0 in recycling percentage rate and technology implementation in a row by composting, incineration, and anaerobic digestion. CML2001, impact assessment method by Center of Environmental Sciences of Leiden University, is used to assess the environmental impact of Global Warming Potential (GWP), Acidification Potential (AP), and Eutrophication Potential (EP). This study found that the significant impact for the four scenarios is GWP by the contribution percentage over 72%. While EP is the second place in the contribution range of 1.70% to 5.46%, and followed by AP under 0.91%. Scenario 1 is the best scenario due to the small contribution of impact compared to other scernarios, and potentially to be applied by modification in increase of composting percentage and additional recovery gas in landfill.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/35020
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/12483
2020-04-17T18:32:55Z
presipitasi:RSA
"161029 2016 eng "
2550-0023
1907-817X
dc
OPTIMALISASI PRODUKSI MIX BED DENGAN PENAMBAHAN REAMANING DI PLTGU TAMBAK LOROK SEMARANG
Ariyanto, David
PT. Indonesia Power
Handariansah, Handariansah
PT. Indonesia Power
Array
PLTGU Tambak Lorok Semarang merupakan pembangkit combined cycle yang memiliki 6 HRSG (Heat Recovery Steam And Generator) sebagai penghasil uap untuk operasional STG. Untuk itu diperlukan air demin sebagai air penambah dalam jumlah yang banyak guna menghasilkan uap. Raw water yang merupakan hasil dari desalination plant selanjutnya akan diolah ke dalam sistem mixbed. Indikator nilai kerja dari suatu kerja mix bed yaitu remaining. Remaining merupakan nilai total volume air demin yang dihasilkan oleh mix bed. Nilai desain remaining dari mix bed yaitu sebesar 5100, akan tetapi setelah mencapai remaining nol nilai
konduktivity masih menunjukkan nilai < 0,8 µS/cm. Untuk itu diperlukan penambahan remaining untuk semua mix bed, dengan penambahan tersebut akan menambah jumlah produksi dari mix bed sendiri dan tentunya akan mengurangi jumlah regenerasi. Program ini sudah dilaksanakan mulai bulan Oktober 2015 – Juni 2016, dan didapat nilai penambahan jumlah air demin sebesar 54.300 m3. Sedangkan pengurangan limbah B3 sebesar 378.642 liter.
Universitas Diponegoro
2016-10-29 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/12483
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 13, No 2 (2016): September 2016
eng
Copyright (c) 2016 Jurnal Presipitasi
oai:ojs.ejournal.undip.ac.id:article/39931
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
Solar-Powered Electrocoagulation System for Tofu Wastewater Treatment and its Characteristic
Muryanto, Muryanto
Indonesian Institute of Sciences https://orcid.org/0000-0002-9478-6037
Sari, Ajeng Arum
Indonesian Institute of Sciences
Pertiwi, Sunu
Indonesian Institute of Sciences
Prasetyo, Danar Aji
Universitas Diponegoro
Sudarno, Sudarno
Universitas Diponegoro
Array
This study aims to investigate the ability of solar-powered electrocoagulation for tofu wastewater, especially for reducing COD and TSS. This feasibility was compared with conventional electrocoagulation using electricity from the state electricity company. The study was conducted on a laboratory scale using a batch reactor electrocoagulation and aluminium electrode. The types of electrolytes used are sodium chloride and potassium chloride. The contact time is 0, 2, 4, 6, and 8 hours. The results showed that removal of COD and TSS in tofu wastewater increases with a longer electrolysis time. During two hours of electrolysis time, the removal of COD and TSS were 25 and 53.85%, respectively. This process yielded the highest COD and TSS removal of 75 and 76.9%, respectively, at 6 hours. Pseudo-second order kinetics about COD removal, both in conventional and solar panel systems, is concluded. By adding NaCl electrolytes, the conductivity of wastewater was increased, and then the removal of COD and TSS was also increased. At the end of the electrolysis time (5 hours), the pH of wastewater was neutral. The results of sludge characterization using FTIR showed the presence of hydroxyl groups, amide compound, and aromatic compound. The process of using solar panels gives results slightly different from conventional electricity, but has advantages in terms of lower operating costs and environmental friendly.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/39931
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/16029
2020-04-17T18:35:02Z
presipitasi:RSA
"171109 2017 eng "
2550-0023
1907-817X
dc
Potensi Chlorella Sp. untuk Menyisihkan COD dan Nitrat dalam Limbah Cair Tahu
Istirokhatun, Titik
Membrane Research Center(Mer-C), Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Aulia, Mustika
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Utomo, Sudarno
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
In order to examine the potential use of tofu-processing wastewater as growth media for microalgae, this research was conducted by cultivating microalgae in varying concentrations. The type of microalga selected in the experiment was Chlorella sp. due to its high reproductive rate. The ability of Chlorella sp. in removing the levels of COD and nitrate contained in the tofu liquid waste were also investigated. This study examined the microalgae growth rate, microalgae cell abundance values, reduced organic levels of COD and nitrate of Chlorella sp which cultivated in tofu wastewater medium. The optimum growth of Chlorella sp was found at 30% v/v of tofu wastewater which reduce COD and nitrate up to 77.40% and 30.03% respectively. From this study, we concluded that tofu-processing wastewater is effective to use as microalgae growth media and at the same time, effective to eliminate COD and nitrate.
Universitas Diponegoro
2017-11-09 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/16029
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 2 (2017): September 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/44881
2022-12-15T03:16:03Z
presipitasi:RSA
"220330 2022 eng "
2550-0023
1907-817X
dc
Decision Analysis of the Composting Unit at Pluit Emplacement, Jakarta Using the Open Bin, Windrow, and Static Pile Methods for Biodegradable Waste
Sari, Mega Mutiara
Universitas Pertamina
Inoue, Takanobu
Toyohashi University of Technology
Harryes, Regil Kentaurus
Indonesia Defense University
Yokota, Kuriko
Toyohashi University of Technology
Septiariva, Iva Yenis
Universitas Sebelas Maret
Suhardono, Sapta
Universitas Sebelas Maret
Kato, Shigeru
Toyohashi University of Technology
Notodarmojo, Suprihanto
Institut Teknologi Bandung
Prameswari, Stacia Dea
Universitas Pertamina
Suryawan, I Wayan Koko
Universitas Pertamina http://orcid.org/0000-0002-5986-0430
Array
Indonesian marine debris of aquatic waste in Jakarta is managed by the UPK of the Water Agency, one of which is the Pluit Employment. Several composting methods can be used and adapted to the available circumstances and needs. The composting process is carried out by utilizing the supply of oxygen, nutrients, water, and temperature control. This study aims to analyze the selection of alternative composting systems that can be carried out for planning the composting unit at Pluit Employment. Selection analysis was carried out using the Utility Theory and Compromise program methods. Alternative 1: This alternative uses a composting system using an open bin. Alternative 2 uses a simple windrow system with garbage piled up without heavy equipment during operation. Alternative 3 uses a composting system with a static pile system with a machine turning it over. In the composting method chosen, alternative 2. The distance between compost for workers' movement space, it can reach 1 m as in the TPS 3R Technical instructions, that because it does not use machines, the land used for machine movement is reduced. Limited land can be utilized for the amount of windrow so that the amount of processed waste can be more significant.
Universitas Diponegoro
2022-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/44881
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 1 (2022): March 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20775
2020-04-17T18:36:06Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
MASTERPLAN SISTEM PENGELOLAAN AIR LIMBAH DOMESTIK DI WILAYAH PERKOTAAN KABUPATEN SUKOHARJO
Oktiawan, Wiharyanto
Departemen Teknik Lingkungan
Hardyanti, Nurandani
Damayanti, Poerborini
Array
Di Indonesia, air limbah domestik merupakan pencemar terbesar yang masuk ke badan air.
Pemantauan dan pengendalian air buangan dapat dilakukan salah satunya dengan
meningkatkan pelayanan dalam hal sanitasi. Pemerintah menetapkan target terhadap tahun
2015-2019 antara lain 100% capaian pelayanan akses air minum, 0% proporsi rumah tangga
yang menempati hunian dan permukiman tidak layak (kumuh) di kawasan perkotaan dan 100%
capaian pelayanan akses sanitasi. Perencanaan masterplan ini bertujuan untuk menyediakan
fasilitas sanitasi yang memadai dalam pengelolaan air limbah domestik terutama di wilayah
perkotaan Kabupaten Sukoharjo. Masterplan ini akan mengkaji aspek teknis-teknologis dalam
perencanaan pengelolaan air limbah domestik. Pada masterplan ini direncanakan akan
dibangun 3 buah IPAL skala perkotaan dan 8 buah IPAL skala permukiman besar yang akan
melayani 20% penduduk perkotaan Kabupaten Sukoharjo. IPAL skala perkotaan direncanakan
terdapat 2 buah di Kecamatan Grogol dan 1 buah di Kecamatan Kartasura. IPAL skala
permukiman besar direncanakan terletak di Kecamatan Kartasura, Kecamatan Gatak, 2 buah di
Kecamatan Baki, masing-masing 1 buah di Kecamatan Bendosari, Gatak, Polokarto dan
Kecamatan Sukoharjo. Selain itu, untuk pelayanan sistem setempat direncanakan 3 (tiga)
daerah pelayanan IPLT yang dibangun secara bertahap. Tahap pertama yaitu optimalisasi IPLT
Eksisting (IPLT Mojorejo), tahap kedua yaitu pembangunan IPLT di Desa Bekonang Kecamatan
Mojolaban, dan tahap ketiga pembangunan IPLT di Desa Grajegan Kecamatan Tawangsari.
IPLT direncanakan dapat melayani sekitar 70% penduduk perkotaan.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20775
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/47058
2023-01-04T09:30:50Z
presipitasi:RSA
"221130 2022 eng "
2550-0023
1907-817X
dc
Rainwater Harvesting-Based Water Resources Conservation
Kariyana, I Made
Universitas Ngurah Rai
Pamungkas, Tri Hayatining
Universitas Ngurah Rai
Weda Erlangga, Ida Bagus
Universitas Ngurah Rai
Array
Denpasar City has an index of population increase worth 2.07% every year. It is feared that this will become a new problem in terms of environmental sustainability, such as the overexploitation of groundwater to meet the community’s water needs. This study aims to support the sustainability of water resources by using Rainwater Harvesting (RWH) as a form of green building planning. The method used in this study is a quantitative descriptive method, which is an analysis method carried out to calculate and describe the scale of RWH in the focus of the system’s effectiveness with the study location in the campus environment of the Ngurah Rai University Denpasar. The results of the study stated that 11 roofs of capture buildings produced rainwater of 1,783,350 litres/year. Another analysis said that this RWH method could cover all water needs, especially water used for flushing toilets. It is stated that the total water deficit of -703,734 litres/year can be subsidized from the entire remaining rainwater harvesting water of 879,624 litres/year. In addition, rainwater harvesting also plays a role as a form of effort to maintain the conservation of water resources and the application of green buildings that are energy efficient and environmentally friendly.
Universitas Diponegoro
2022-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/47058
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 3 (2022): November 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/22857
2020-04-17T18:37:59Z
presipitasi:RSA
"190617 2019 eng "
2550-0023
1907-817X
dc
Pengaruh Penambahan Gula Pasir Terhadap Kualitas Makanan Kelinci dari Limbah Sayuran Pasar dengan Teknologi Fermentasi
Sutrisno, Endro
Universitas Diponegoro
Hadiwidodo, Mochtar
Universitas Diponegoro
Handayani, Dwi Siwi
Universitas Diponegoro
Wardhana, Irawan Wisnu
Universitas Diponegoro
Sabrina, Azzura
Universitas Diponegoro
Array
Sampah merupakan masalah yang paling umum ditemui di Indonesia. Peningkatan jumlah penduduk di Indonesia yang semakin meningkat menyebabkan meningkatnya jumlah sampah yang dihasilkan dan berdampak buruk bagi lingkungan. Berkembangnya Kota Semarang mengakibatkan jumlah penduduk di Kota Semarang meningkat disertai dengan peningkatan konsumsi masyarakat. Masyarakat di Kota Semarang dalam memenuhi kebutuhan konsumsi harian salah satunya dilakukan di pasar. Dengan meningkatnya tingkat konsumsi masyarakat di pasar mengakibatkan jumlah limbah padat organik pasar-pasar di Kota Semarang khususnya limbah sayuran ikut meningkat. Pemanfaatan limbah sayuran pasar biasanya dijadikan pupuk. Selain dimanfaatkan menjadi pupuk, limbah sayuran pasar dapat juga dijadikan pakan ternak yaitu pakan kelinci. Jika diolah menjadi pakan kelinci, sampah tersebut tidak hanya menjadi sebuah produk saja tetapi dari hasil pakan yang dikonsumsi oleh kelinci tersebut menghasilkan daging dengan kualitas yang baik serta menghasilkan pupuk organik hasil dari kotoran kelinci. Pemanfaatan limbah sayuran pasar ini dilakukan dengan pengolahan limbah sayuran pasar menjadi pakan kelinci dengan penambahan gula pasir sebagai sumber energi. Pengolahan limbah sayuran pasar menjadi pakan kelinci dilakukan dengan teknologi fermentasi. Proses fermentasi dilakukan selama 7 hari.
Universitas Diponegoro
2019-06-17 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/22857
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 1 (2019): Maret 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/51660
2023-04-09T04:36:46Z
presipitasi:RSA
"230330 2023 eng "
2550-0023
1907-817X
dc
The Potential of Landfill Waste in Rembang City as Raw Material for Refuse Derived Fuel (RDF)
Hapsari, Okmi
Universitas Diponegoro
Syafrudin, Syafrudin
Universitas Diponegoro
Budihardjo, Mochamad Arief
Universitas Diponegoro
Array
The Landoh landfillwas expired in 2022 due to the increasing amount of waste generated. The solution is to extend the service life of the landfill using the landfill mining method. The waste in the landfill is used as raw material for refuse derived fuel (RDF). The aim of the research is to find out the potential of landfill mining at Landoh landfillwhether it can be used as raw material for RDF. Primary data was taken from Landoh landfill in February 2022 with a depth of 1-2 meters and 3-4 meters from the surface of the waste generation and interviews with landfill officials. The waste samples were analyzed for waste composition, moisture content, volatile content, ash content and heating content. The waste composition is dominated by organic waste which has a large moisture content but a small caloric content. From the results of the research that the waste needs to be pre-treated (chopping and drying) for 21 days in order to fulfil the standard values of moisture content, volatile content, ash content and calorific content according to RDF raw material requirements. This method is a solution to overcoming expired landfills, reducing the volume of waste and landfill area requairements.
Universitas Diponegoro
2023-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/51660
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 1 (2023): March 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/26002
2020-08-31T06:24:11Z
presipitasi:RSA
"191130 2019 eng "
2550-0023
1907-817X
dc
Evaluation of Domestic Wastewater as a Basis for the Design of Communal Domestic Wastewater Installation of Kandang Kampong, Condongcatur Village, Yogyakarta
Utami, Ayu
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Nugroho, Nandra Eko
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Febriyanti, Salam Via
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Anom, Thamzez Nuur
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Muhaimin, Ahmad
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Array
Pertambahan penduduk yang meningkat, limbah cair domestik yang dihasilkan akan meningkat juga. Limbah cair domestik perlu diolah dengan baik agar tidak mencemari badan air penerimanya. Kampung Kandang sudah memiliki IPAL domestik komunal untuk mengolah limbah cair domestik yang dihasilkan oleh warganya. Kendala yang dirasakan warga sehingga IPAL ini perlu direhabilitasi adalah banyaknya lumpur mengapung pada bak biologis pertama dan masih tercium bau yang mengganggu. Keluhan warga tersebut bisa diatasi dengan merehabilitasi IPAL agar fungsinya lebih optimal. Tujuan dari penelitian ini adalah untuk mengevaluasi air limbah domestik di Kampung Kandang. Metode yang digunakan dalam mengevaluasi antara lain analisis data primer, perhitungan evaluasi standar stream dan perhitungan persen penyisihan. IPAL Domestik Komunal Kampung Kandang perlu menyisihkan parameter COD, BOD, TSS, Amonia, dan Total Koliform sebesar 97,7%, 98,9%, 42,7%, 95,6%, dan 99,9%. IPAL tersebut sudah mampu menyisihkan TSS dan Amonia. Sedangkan BOD, COD, dan Total Koliform masih perlu disisihkan sebanyak masing-masing 25,9%, 35%, dan 95,83%. Data evaluasi air buangan dapat digunakan sebagai dasar perancangan rehabilitasi yang akan dilakukan pada IPAL Domestik Komunal di Kampung Kandang.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/26002
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/26002/73822
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/53774
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
Landfill Leachate Treatment with Ozonation to Improve Biodegradability
Junaidi, Junaidi
Universitas Diponegoro
Oktiawan, Wiharyanto
Universitas Diponegoro
Novianti, Komang Dewi
Universitas Diponegoro
Array
Leachate is a liquid that comes from processed waste generation so that it contains compounds that are harmful or toxic to the environment. The quality of the leachate obtained included COD: 3,315 mg/l, BOD: 339 mg/l, TSS: 216 mg/l, and color 3,1210 Pt.Co. Waste processing site Temesi has a BOD/COD ratio of 0.11, this value is not suitable for using biological treatment because the biodegradability value is small so it is difficult for microorganisms to degrade existing pollutants. Therefore, it is necessary to have an pretreatment that is used to increase the value of biodegradability, one of which is oxidation using ozone. Ozone has a strong oxidizing value so that it can produce free radicals to break long chains of pollutants so that they become simpler. This research on ozone oxidation resulted in an increase in the BOD/COD ratio from 0,1 to 0.14 with a generator capacity of 36 g/hour. In this study, an ozone generator of 100 G/hour was used which increased the BOD/COD ratio to 0.46 with a final COD yield of 815 mg/l increasing BOD to 379 mg/l, TSS become 157,62 mg/L and color become 23.642 Pt.Co.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/53774
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/27771
2020-08-31T05:28:29Z
presipitasi:RSA
"200331 2020 eng "
2550-0023
1907-817X
dc
Zeolites Synthesis and Characterization from Bagasse Ash as Cu (II) Heavy Metal Adsorbent
Setiawan, Adhi
Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=z_XYZ3MAAAAJ&hl=id&oi=ao
Hanun, Jihan Nabillah
Politeknik Perkapalan Negeri Surabaya
Afiuddin, Ahmad Erlan
Politeknik Perkapalan Negeri Surabaya
Array
Abu Bagasse merupakan limbah padat yang dihasilkan dari sisa pembakaran ampas tebu di industri gula. Kandungan silika yang relatif tinggi pada abu bagasse dapat dimanfaatkan sebagai bahan baku pembuatan zeolite. Zeolite dapat dimanfaatkan sebagai adsorben logam berat pada pengolahan limbah cair industri. Penelitian ini bertujuan untuk mensintesis zeolite dari abu bagasse serta mengaplikasikan zeolite sebagai adsorben logam Cu(II) di dalam reaktor sistem kontinyu. Pengaruh waktu kontak, ukuran zeolite, serta konsentrasi larutan Cu(II) terhadap efisiensi penyisihan logam telah dipelajari pada penelitian ini. Sintesis Sintesis zeolite dilakukan menggunakan metode hidrotermal pada suhu 100°C selama 7 jam. Zeolit hasil sintesis dikarakteristisasi menggunakan SEM-EDX, XRD, FTIR, dan BET Proses adsorpsi dilakukan dengan menggunakan reaktor kontinyu dengan laju alir 0,4 L/menit serta dialirkan selama 60 menit dengan pengambilan sampel setiap interval waktu 15 menit. Hasil analisis SEM-EDX menunjukkan bahwa Zeolit memiliki morfologi tidak teratur serta mengandung Si sebesar 35,15%. Hasil XRD menunjukkan bahwa kristalinitas zeolite relatif rendah. Luas permukaan spesifik zeolite pada ukuran 100 mesh dan 200 mesh masing-masing sebesar 439,48 m2/g dan 697,76 m2/g. Hasil pengujian adsorpsi limbah Cu(II) terbaik diperoleh pada kondisi zeolit dengan ukuran partikel 200 mesh, konsentrasi air limbah Cu(II) 25 mg/L, dan waktu operasional 60 menit dengan efisiensi penyisihan Cu(II) sebesar 41,57%.
Universitas Diponegoro
2020-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/27771
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 1 (2020): Maret 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/31896
2020-12-17T04:40:28Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Performance of Microbial Fuel Cell with Variation of External Resistors in Producing Electrical Energy and Removing Organic Compounds in Wastewater
Hidayat, Syarif
Institut Teknologi Bandung http://orcid.org/0000-0003-1611-6887
Aghnia, Dini Widyani
Institut Teknologi Bandung
Kardena, Edwan
Institut Teknologi Bandung
Helmy, Qomarudin
Institut Teknologi Bandung
Array
Microbial Fuel Cell (MFC) merupakan teknologi yang dapat digunakan untuk mengkonversikan senyawa organik yang terkandung dalam limbah cair menjadi energi listrik. Pada penelitian ini dilakukan variasi hambatan eksternal (1000 Ω, 800 Ω, 400 Ω, 200 Ω, 100 Ω, dan 50 Ω) pada reaktor MFC untuk menentukan kondisi optimum dalam menghasilkan energi listrik dan menyisihkan senyawa organik. Kinerja reaktor MFC dievaluasi berdasarkan besarnya beda potensial, kerapatan daya, efisiensi Coulomb (CE), dan penyisihan senyawa organik. Tujuan dari pengukuran parameter ini adalah untuk menentukan kinerja reaktor MFC dalam menghasilkan energi listrik dan menyisihkan senyawa organik pada masing-masing variasi penelitian. Selain itu, dilakukan uji biokimia untuk melihat aktivitas dari mikroorganisme dalam reaktor untuk kemudian dijadikan dasar dalam menentukan jenis mikroorganisme dominan yang tumbuh dalam reaktor MFC. Penentuan jenis mikroorganisme menjadi penting untuk optimasi kondisi lingkungan pada penelitan selanjutnya. Hasil penelitian menunjukan bahwa kinerja reaktor MFC dipengaruhi oleh hambatan eksternal yang digunakan. Reaktor MFC dengan hambatan eksternal 100 Ω dipilih sebagai kondisi optimum karena menghasilkan kerapatan daya (174,2 mW/m2) dan penyisihan organik (91%) tertinggi dibandingkan dengan reaktor lain. Selain itu, nilai CE pada kondisi tersebut mencapai 57%, sedikit lebih rendah dari nilai CE yang dihasilkan oleh reaktor MFC dengan hambatan eksternal 50 Ω yaitu 65%. Berdasarkan uji biokimia, mikroorganisme yang tumbuh pada elektroda anoda adalah bakteri yang masuk dalam genus Clostridium (Clostridium sp1 dan Clostridium sp2) yang ditenggarai sebagai jenis bakteri yang termasuk ke dalam exoelectrogen. Berdasarkan hasil tersebut dapat lihat bahwa pemilihan hambatan eksternal yang tepat merupakan faktor penting dalam pengoperasian reaktor MFC.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/31896
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/34179
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Aurilia, Mia Fitri
Santoso, Dian Hudawan
UPN "Veteran" Yogyakarta
Sungkowo, Andi
Human needs for clean water can be obtained from various sources, one of those is springs. The spring is the main water source for the people in Redinkidul Hamlet. The dependence of the community on springs shows that there is a need for conservation of spring recharge areas. The purpose of this study was to determine the ability of recharge areas to absorb water and provide conservation direction for spring recharge areas. The research method used is survey and mapping methods to obtain data on existing conditions in the field, scoring and overlay methods to determine the condition of the recharge area based on the results obtained. The scoring parameter refers to Permen PU No. 2 of 2013. The results obtained show that the spring recharge area zone has a moderate class with a score of 11-13. The highest score obtained is on the parameters of land use and rainfall. Based on these results, the proposed conservation directives are in the form of technical conservation directions in the form of bund terraces and spring support buildings. This conservation is needed so that the potential of the spring is maintained.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/34179
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/37766
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
The Effectiveness of Reducing Ammonia Content Using Phytoremediation Methods in Domestic Waste of Pelita Bangsa University
Nurhidayanti, Nisa
Universitas Pelita Bangsa https://orcid.org/0000-0001-8625-0446
Sara, Nadya Ulfani
Universitas Pelita Bangsa
Array
Pelita Bangsa University is a private university with an increasing number of students every academic year. The increase in the number of students causes an increase in the amount of domestic waste generated. This study aims to determine the effectiveness of reducing Ammonia content in Pelita Bangsa University Domestic Waste by phytoremediation method using Apu Wood (Pistia stratiotes L.) and Kana Flower (Canna Indica) as well as the use of coffee grounds as activated carbon. The first step in this research is the manufacture of activated carbon from coffee grounds. The next step is to take samples of the Pelita Bangsa University domestic waste test. The test samples were brought to the laboratory, and the Ammonia parameter was tested to determine the initial concentration of the waste. Then the next step is the acclimatization process of plants and then continued with the Range Finding Test process. After that, the waste treatment process is carried out with a phytoreactor. Furthermore, the waste from the phytoreactor processing is taken to the laboratory for testing the ammonia parameters. The last step is to analyze the test results data. Based on the results of laboratory tests, the ammonia content after the phytoremediation process with and without a filter is <0.1 mg/L with the effectiveness of reducing the ammonia concentration by 97.10% with the addition of coffee grounds activated carbon filter and 96.7% for the use of the phytoremediation method without filters.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/37766
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14718
2020-04-17T18:34:12Z
presipitasi:RSA
"170515 2017 eng "
2550-0023
1907-817X
dc
PENGOLAHAN AIR LINDI TPA JATIBARANG MENGGUNAKAN FENTON (H2O2 – Fe)
Rezagama, Arya
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
purwono, purwono
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Hadiwidodo, Mochtar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Yustika, Mia
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Prabowo, Zuhda Nur
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Pembuangan lindi ini berpotensi mencemari lingkungan dan mengakibatkan gangguan kesehatan. Air lindi TPA Jatibarang dikategorikan sebagai lindi tua karena telah berusia lebih dari 10 tahun dengan nilai COD sebesar 4000 mg/l. Pengolahan lindi menggunakan proses fenton bertujuan untuk mengetahui efisiensi penyisihan kadar BOD, COD, warna di dalam lindi. Variasi penelitian meliputi jumlah penambahan H2O2, dan Fe2O3. Reaksi penelitian menggunakan kolom batch yang diaduk menggunakan stirer. Pengolahan air lindi menggunakan fenton menunjukkaan hasil yang cukup baik dalam munurunkan beban limbah organik. Hal ini nampak secara jelas dari penguraian warna berkurang dari 3800 ptco dan 750 ptco. Pada pengolahan fenton Pada dosis Fe/H2O2 sebesar 1,14 gr dan 3,8 ml, penurunan warna yang paling signifikan mencapai 82% sebesar 140 ptco pada waktu proses 2 jam. fluktuasi penyisihan pada penurunan nilai COD. Proses fenton menunjukkan bahwa waktu pengolahan cukup mempengaruhi efisiensi penurunan parameter COD. Pada proses fenton terjadi presentase penurunan hingga 56 % pada 240 menit pada variasi 0,38 gr FeSO4 dan 3,8 ml H2O2. Beban organik yang ditunjukan dengan COD pada lindi awal berkisar 3800 mg/l kemudian di koagulasi flokulasi menjadi 2700 mg/l dan ketika di lakukan proses fenton berakhir pada 1000 mg/l untuk hasil terbaik Fluktuasi penurunan COD pada menit 60 hingga 180. Hasil pengolahan belum dapat memenuhi baku mutu air lindi pada yang terlampir pada Peraturan Daerah Provinsi Jawa Tengah Nomor: 5 Tahun 2012. Namun, penguraian beban organik dan peningkatan rasio BOD/COD pada proses fenton dapat mengoptimalakan pengolahan biologi IPL eksisting berupa kolam oksidasi dapat berjalan dengan baik.
Universitas Diponegoro
2017-05-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/14718
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 1 (2017): Maret 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/42825
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
Preliminary Study of Actinomycetes as Potential Biocatalyst in Biodiesel Production Through Microbial Lipase Activity
Zulaika, Aidha
Binawan University,
Ningrum, Sari Sekar
Binawan University
Guntama, Dody
Jayabaya University
Array
Biocatalysts are biological substances that act as an accelerator of chemical reactions without causing influence on the living organism chemically. Biocatalysts based on renewable sources, biodegradable, tolerance to pH and temperature, and high selectivity to stereochemistry substrates and products. The utilization of biocatalyst is environmentally friendly and effective in production costs. This research aimed to determine the potential of actinomycetes as a biocatalyst in biodiesel production. This research method isolation and identification of actinomycetes isolates, conducting lipase activity test to determining lipase enzyme production of actinomycetes isolates. The data analysis in microbial identification was conducted by molecular identification by Gene bank through Basic Local Alignment Search Tool (BLAST). The lipase activity of actinomycetes analyzing by the value of lipase rate of test microbes. Based on chemical analysis of lipase activity, this research results show that actinomycetes T1A has the highest lipase activity by 14.4640 mU/g. Based on molecular identification analysis, actinomycetes T1A was identified as Streptomyces sp., 99% similar to Streptomyces phaeochromogenes.
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/42825
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/17998
2020-06-14T16:21:53Z
presipitasi:RSA
"180329 2018 eng "
2550-0023
1907-817X
dc
Pengaruh Pendampingan Masyarakat dalam Pemilahan Sampah di Desa Pucung Kecamatan Tirto Kabupaten Pekalongan
Samadikun, Budi Prasetyo
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Potential problems in household waste management are still found, especially in residential areas. Pucung Village, Tirto District Pekalongan Regency with a population of 3.347 people, is one example of a village that has not implemented waste management properly. The availability of inadequate trash can be one of the factors that causes the waste has not been well managed in this village. This community assistance activity aims to educate and encourage the community to be self-sufficient in waste management, especially in waste sorting. According to the recommendations of Pucung Village Government, this community assistance activity is centered in RT 04 RW 01 area as an embryo or pilot project to be implemented in all Pucung Village area. The methods used are survey, socialization, simulation, and post-socialization follow-up. The residents are quite enthusiastic and appreciative towards this activity, shown by the attendance rate of more than 60% during socialization and conducive discussion. The results of post-socialization evaluation indicate that people have started to realize in managing waste, indicated by the separated garbage in a different trash can at their residence
Keywords: accompaniment, sorting, waste, Pucung
Universitas Diponegoro
2018-03-29 12:24:08
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/17998
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 1 (2018): Maret 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/46896
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
Effect of Fly Ash Variation and Heating Temperature on Physical Properties, Chemical Composition, Phase Structure, and Morphology in Making Red Brick
Rajiman, Rajiman
Bandar Lampung University
Amin, Muhammad
National Innovation Research Agency (BRIN)
Sudibyo, Sudibyo
National Innovation Research Agency (BRIN)
Suprihatin, Suprihatin
University of Lampung
Rufaidah, Fahda
University of Lampung
Array
Red brick is a building material that can be used as a construction material. Red bricks are made of pure clay or mixed materials. This study aimed to determine the effect of fly ash and heating temperature variations on physical properties (compressive strength, density, porosity, and absorption), chemical composition, phase structure, and morphology in brick making. The addition of fly ash by 10%, 20%, 30%, 40%, and 50% of the composition of the material is 750 grams. The red bricks were printed with a size of 5 x 5 x 5 cm3, heated at 700°C and 800°C for 2 hours, and soaked for 24 hours. Physical tests include compressive strength test, density test, porosity test, and absorption test, as well as red brick characterization, namely XRF, XRD, and SEM-EDS. Red brick with sample A10 at a temperature of 700°C has the highest compressive strength value of 3.68 Mpa, while red brick with sample A10 at a temperature of 800 °C has the highest compressive strength value of 4.17 Mpa. Characterization shows that the phases formed in red brick are quartz (SiO2), hematite (Fe2O3), and anorthite (Al2O3).
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/46896
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/21021
2020-04-17T18:37:41Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
Peningkatan Stabilitas Lereng Lapisan Tanah Liat Penahan Lindi TPA dengan Penambahan Limbah Bangunan
Budihardjo, Mochamad Arief
Departemen TeknikLingkungan,Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
Array
Liner merupakan komponen terpenting dalam fasilitas tempat pengolahan akhir (TPA) sampah untuk mencegah lindi mencemari tanah. Bahan yang sering digunakan sebagai liner adalah tanah lempung yang memiliki permeabilitas rendah. Salah satu tanah lempung alami yang dapat digunakan sebagai liner TPA adalah bentonit. Bentonit memiliki permeabilitas yang sangat rendah, namun stabilitas gesernya tidak begitu kuat sehingga berpotensi mengalami keruntuhan apabila digunakan di daerah lereng.Di sisi lain, limbah bangunan yang berupa pecahan batu bata, campuran pasir dan semen, serta beton memiliki kuat geser yang tinggi dan berpotensi sebagai campuran bentonit. Pada penelitian ini, limbah bangunan sebanyak 5%, 10%, dan 15% ditambahkan pada bentonit untuk meningkatkan kekuatan geser bentonit sehingga didapatkan campuran bahan semi kedap dengan stabilitas yang lebih tinggi dan permeabilitas rendah. Hasil uji stabilitas geser yang dilakukan pada tegangan normal 50 kPa , 100 kPa, dan 200 kPa menunjukkan bahwa semakin meningkatnya konsentrasi campuran bahan bangunan, maka semakin meningkat pula nilai tegangan geser yang dihasilkan
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/21021
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/49463
2023-04-09T04:36:46Z
presipitasi:RSA
"230330 2023 eng "
2550-0023
1907-817X
dc
Compost Quality of Compost Process Grass Waste with Composting Bin Method
Setiani, Vivin
Shipbuilding Institute of Polytechnic Surabaya https://scholar.google.co.id/citations?user=tkFGxfEAAAAJ&hl=en https://orcid.org/0000-0001-6398-3997
Nindyapuspa, Ayu
Shipbuilding Institute of Polytechnic Surabaya https://scholar.google.com/citations?hl=en&authuser=5&user=Yo9acOwAAAAJ
Nurbiyanti, Rizki Alifiya
Shipbuilding Institute of Polytechnic Surabaya
Array
The increasing of organic waste can increase environmental pollution. This can be overcome by doing aerobic composting of organic waste. This was because the method includes a simple composting method in its application. The aim of this study is to analyze the quality of compost from grass waste. In this study, composting of grass waste, banana leaf waste and cotton waste has been carried out aerobically with the waste composting method. The compost material consisted of 76% grass waste, 12% banana leaf waste and 12% cotton waste with the addition of EM4 0, 10 and 50 mL/Kg doses of compost material. Monitoring of quality compost consist of temperature, pH, moisture content, C/N ratio, phosphor and potassium. Analysis of compost quality in this study refers to SNI 19-7030-2004. The results showed that the quality of compost without the addition of EM4 was the best compost quality of all the variables in this study.
Universitas Diponegoro
2023-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/49463
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 1 (2023): March 2023
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/49463/156600
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/26683
2020-08-31T06:24:19Z
presipitasi:RSA
"191126 2019 eng "
2550-0023
1907-817X
dc
Identification of Waste Flow in Semarang City Through Community-Based Waste Management
Ramadan, Bimastyaji Surya
Universitas Diponegoro http://bimastyaji.wordpress.com http://orcid.org/0000-0002-5194-0743
Fauziyah, Fita
Universitas Diponegoro
Budihardjo, Mochamad Arief
Universitas Diponegoro
Syafrudin, Syafrudin
Universitas Diponegoro
Array
Pengelolaan sampah berbasis masyarakat merupakan salah satu bentuk pengelolaan sampah yang direkomendasikan oleh pemerintah karena sangat efektif untuk mewujudkan zero waste society. Di Indonesia, pengelolaan sampah berbasis masyarakat ini dapat terwujud melalui pengembangan bank sampah di tingkat RW dan kelurahan. Pada tahun 2019, Kota Semarang teridentifikasi memiliki 48 unit bank sampah yang aktif mengelola sampah masyarakat. Sampah yang dikelola oleh bank sampah adalah plastik, kertas dan logam. Namun demikian, terdapat sampah organic yang juga dikelola oleh beberapa bank sampah. Tujuan dari penelitian ini adalah untuk mengidentifikasi dan menganalisis aliran sampah melalui pengelolaan sampah berbasis masyarakat, dalam hal ini bank sampah, di Kota Semarang. Metode yang digunakan adalah survei dan wawancara yang mendalam terkait sistem pengelolaan bank sampah di Kota Semarang. Hasil penelitian menunjukkan bahwa kegiatan bank sampah eksisting mampu mereduksi sampah di kota Semarang sebesar 0.07% dari total timbulan sampah di Kota Semarang. Penelitian ini dapat digunakan sebagai acuan untuk membangun strategi pengelolaan sampah berbasis masyarakat yang lebih baik, khususnya di Kota Semarang.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/26683
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
ind
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/25426
2020-08-31T05:28:29Z
presipitasi:RSA
"200331 2020 eng "
2550-0023
1907-817X
dc
Processing Fish Waste Into Biodiesel Using Microwave Radiation
Purwaningrum, Shintawati Dyah
Universitas Pandanaran
Sukaryo, Sukaryo
Universitas Pandanaran
Array
Limbah ikan diketahui masih mengandung minyak dalam jumlah yang cukup besar, sehingga perlu dilakukan pengolahan menjadi sesuatu yang lebih bermanfaat, salah satunya biodiesel. Langkah pertama dalam pembuatan biodiesel yaitu pengambilan minyak dari limbah ikan dengan cara pengukusan, kemudian dianalisa kadar asam lemak bebas. Proses dilanjutkan dengan esterifikasi karena nilai FFA diatas 1%, dengan waktu reaksi 15 menit dan daya microwave sebesar 450 watt. Reaksi esterifikasi dan transesterifikasi berlangsung di dalam microwave yang dimodifikasi. Penelitian ini menggunakan variabel bebas berupa variasi daya mikrogelombang (microwave) 300, 450, 600 dan 800 watt dan perbandingan banyaknya minyak dengan pelarut methanol 1:6, 1:12, 1:18, 1:24. Rendemen tertinggi diperoleh pada variable perbandingan reaktan 1:18 dan daya microwave 600 watt sebesar 97%, sedangkan rendemen terendah ditemukan pada variable 1:6 dengan daya gelombang microwave 300 watt sebesar 88%. GC-MS digunakan untuk mengetahui apakah terbentuk metil ester pada biodiesel atau tidak. Metil ester yang terkandung berupa asam stearat dengan luas area sebesar 21%. Analisis karakteristik biodiesel densitas sebesar 863 kg/m3, viskositas 3,12 mm2/s, angka setana sebesar 55,72. Dari beberapa uji karakteristik biodiesel limbah ikan masuk dalam syarat biodiesel Standar Nasional Indonesia. Pengujian kadar air menunjukkan angka yang masih tinggi di atas batas yang ditetapkan SNI yaitu sebesar 0,80 %.
Universitas Diponegoro
2020-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/25426
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 1 (2020): Maret 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/31110
2020-12-17T04:04:21Z
presipitasi:RSA
"200731 2020 eng "
2550-0023
1907-817X
dc
Analysis of Plant Composition in the Green Belt Area of Palasari Reservoir
Wedayani, Ni Made
Universitas Mahasaraswati
Vipriyanti, Nyoman Utari
Universitas Mahasaraswati
Widnyana, I Ketut
Universitas Mahasaraswati
Array
Waduk Palasari merupakan waduk terbesar di Pulau Bali yang berfungsi sebagai penyedia air untuk memenuhi kebutuhan hidup masyarakat sekitar. Kondisi waduk yang berbatasan langsung dengan Hutan Palasari, menjadikan kawasan vegetasi sekitar waduk berperan penting dalam menjaga cadangan air tanah dan mengurangi laju erosi di area bantaran waduk. Penelitian ini bertujuan untuk menganalisis struktur vegetasi dan keragaman serta upaya konservasi di kawasan sabuk hijau Waduk Palasari. Metode yang dipergunakan adalah indeks kerapatan, indeks Shannon-Wienner, indeks Simpson serta indeks nilai penting (INP) untuk mengetahui kedudukan ekologis tanaman dalam suatu komunitas. Hasil penelitian menunjukkan bahwa, tanaman yang memiliki peran dalam komunitas sabuk hijau Waduk Palasari diantaranya yaitu pisang, mahoni dan spathodea, yang ditunjukkan oleh INP tertinggi berkisar 20,83%, 20,24% dan 19,80%. Ketiga jenis tanaman ini merupakan tanaman yang adaptif dan mampu mengurangi erosi. Adapun nilai keanekaragaman tanaman pada area penelitian tergolong sedang dengan dominasi keanekaragaman spesies di tingkat pohon. Upaya pelestarian sabuk hijau secara berkelanjutan perlu dilakukan dengan memperbanyak jumlah tanaman endemik di kawasan waduk seperti pulai dan bayur, hal ini perlu diupayakan guna mempertahankan identitas kawasan.
Universitas Diponegoro
2020-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/31110
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 2 (2020): Juli 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/33460
2020-12-17T04:33:01Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
The Potential of Methane Gas as an Alternative Energy Source in Kebon Kongok Landfill
Abdullah, Taufik
Sekolah Tinggi Teknik Lingkungan Mataram
Hidayat, Nur Rosman
Sekolah Tinggi Teknik Lingkungan Mataram
Sholehah, Hijriati
Sekolah Tinggi Teknik Lingkungan Mataram
Array
Pemanasan global merupakan kondisi peningkatan temperatur rata-rata permukaan bumi akibat konsentrasi gas rumah kaca yang berlebih diantaranya emisi gas metana (CH4) dengan potensi pemanasan global 21 kali lipat dibanding CO2. Kandungan gas metana dapat berasal dari biogas yang dihasilkan dari sampah Tempat Pemrosesan Akhir (TPA) dengan prosentase kandungan 50-70%. Selain menyebabkan global warming apabila tidak ditangani dengan baik, gas metana juga dapat menimbulkan dampak negatif bagi lingkungan karena sifatnya yang mudah terbakar akan menimbulkan ledakan hingga kebakaran seperti yang dialami TPA Regional Kebon Kongok pada akhir Oktober 2019. Penelitian ini bertujuan untuk mengetahui potensi kandungan gas metana dari sampah TPA Kebon Kongok sebagai sumber energi alternatif dengan melakukan pemodelan menggunakan software LandGEM. Data masukan yang digunakan dalam pemodelan LandGEM yakni tahun rencana operasi TPA dan data sampah masuk ke TPA per tahun. Potensi kandungan gas metana yang dihasilkan dari pemodelan tersebut sebanyak 12.999.633,62 m3 dan jika dikonversi ke dalam bentuk energi listrik setara 14.520,88 MWh atau dalam bentuk gas sebanyak 9.966,38 Megagram elpiji.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/33460
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/33460/99175
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/36873
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Evaluation of Regional Domestic Waste Water Treatment Plant Performance in Cimahi City
Dirgawati, Mila
Institut Teknologi Nasional Bandung https://www.scopus.com/authid/detail.uri?authorId=56798631400
Sururi, Mohamad Rangga
Institut Teknologi Nasional Bandung https://sinta.ristekbrin.go.id/author/?mod=profile&p=stat
Wiliana, Wili
Institut Teknologi Nasional Bandung
Widiawati, Nining
Dinas Perumahan dan Kawasan Permukiman
Array
Domestic wastewater treatment plant performance (WWTP) currently refers to stringent wastewater quality standards (Minister of Environment and Forestry Regulation No. 68 of 2016) considering potential environmental degradation because of pollutants in the wastewater. This study evaluated the performance of the Regional Domestic WWTP in Cimahi City. Cimahi has 10 WWTPs which were operated by an Anaerobic Baffled Reactor system. Periodic monitoring only measured the wastewater characteristics after treatment with parameters: total suspended solids (TSS), ammonia, chemical oxygen demand(COD), biological oxygen demand(BOD), and oil and grease. Therefore, wastewater characteristics were measured before and after treatment at selected WWTP during peak and non-peak hours, with TSS, ammonia, and COD. Important hydraulic factors were also measured: flow velocity at peak and non-peak hours, hydraulic detention time, and sludge height. Effluent from all WWTPs did not meet the standard. However, WWTPs with detention time >2 days produced parameter concentrations closed to the maximum value. The selected WWTP has a 5.7days detention time with removal efficiency for COD 57.52%, and TSS 42.56%, during peak period and COD 60.19% and TSS 34.84% for a non-peak period, but ammonia concentration did not decrease. Overall, WWTP has not been able to meet quality standards and the quality.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/36873
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/14713
2020-04-17T18:33:43Z
presipitasi:RSA
"170515 2017 eng "
2550-0023
1907-817X
dc
PENGARUH FERMENTASI KOTORAN KAMBING PADA EMISI GAS (CO2, CH4, N2O) VERMICOMPOSTING SAMPAH ORGANIK
Sutrisno, Endro
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Wardana, Irawan Wisnu
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Priyambada, Ika Bagus
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Array
Kegiatan pengelolaan sampah dapat melepaskan gas rumah kaca (GRK) ke atmosfer dan mengintensifkan iklim global. Pengomposan adalah proses komponen aerobik karbon degradable organik dalam limbah diubah menjadi karbon dioksida. Menggabungkan prakompos dan vermicomposting berpotensi menimbulkan emisi amonia dan gas rumah kaca. Desain percobaan dilakukan dengan memberikan fermentasi kotoran kambing dalam vermicomposting sampah organik dengan jumlah yang berbeda untuk mengetahui pengaruh fermentasi kotoran kambing terhadap emisi gas CO2, CH4, N2O saat kematangan kompos. Desain penelitian ini menggunakan 4 kombinasi yaitu kombinasi pertama 80% sampah organik, 20% kotoran kambing; kombinasi kedua yaitu 80% sampah organik, 20% kotoran kambing, 100 mL Aspergilus niger; kombinasi ketiga yaitu 60% sampah organik, 40% kotoran kambing; dan kombinasi keempat yaitu 60% sampah organik, 40% kotoran kambing, 100 mL Aspergilus niger. Kriteria pengujian yang digunakan adalah pengujian emisi gas CO2, CH4, N2O di akhir kematangan kompos. Dengan adanya penambahan kotoran kambing, semakin banyak kotoran kambing ditambahkan emisi gas CO2, CH4dan NO semakin banyak. Sedangkan dengan ditambahkan Aspergillus niger, proses fermentasi semakin cepat dalam menghasilkan emisi gas CO2, CH4 dan N2O.
Universitas Diponegoro
2017-05-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/14713
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 1 (2017): Maret 2017
eng
Copyright (c) 2017 Jurnal Presipitasi: Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/40978
2022-02-19T07:21:43Z
presipitasi:RSA
"211130 2021 eng "
2550-0023
1907-817X
dc
The Use of Lumbricus Rubellus Earthworm Effect in Composting Process of Musa Paradisiaca L. Peel Waste
Siswanto, Vely Kukinul
Sepuluh Nopember Institute of Technology http://scholar.google.co.id/citations?user=ImrBxpYAAAAJ&hl=en
Setiani, Vivin
Shipbuilding Institute of Polytechnic Surabaya https://scholar.google.co.id/citations?user=_hF5gzYAAAAJ&hl=en https://orcid.org/0000-0001-6398-3997
Nindyapuspa, Ayu
Shipbuilding Institute of Polytechnic Surabaya https://scholar.google.com/citations?hl=en&authuser=5&user=Yo9acOwAAAAJ
Kurniawati, Ummi Fadlilah
Sepuluh Nopember Institute of Technology https://scholar.google.co.id/citations?user=qB5qFscAAAAJ&hl=id
Kamilah, Mutiara Mayang
Shipbuilding Institute of Polytechnic Surabaya
Array
Conventional organic waste composting is one of the processing of organic waste that produces fertilizer. However, the conventional composting process for organic waste lasts 1-3 months. Vermicomposting is composting that lasts a short time, and in addition, vermicomposting produces compost and worms with a high selling value. So, in this study, Musa Paradisiaca L (MPL) peel and sawdust waste were composted using the vermicomposting method into compost. The primary data in this study consisted of monitoring the C/N ratio, temperature, pH, moisture content, texture, the particle size of compost for 3 weeks of the composting process. Testing the analysis of the effect of using Lumbricus Rubellus (LR) earthworms in the composting process of MPL peel waste and sawdust by using LR earthworms. The study results showed that LR worms had no effect on temperature, pH, water content, and C/N ratio during the composting process of MPL peel waste but did affect the texture, particle size, and product of compost weight. pH, moisture content, and temperature of compos with adding LR earthworms and without LR worms was 7, less than 50%, 27-29 0C, respectively. The C/N ratio of compost that uses LR earthworms was 28, while the C/N ratio of composting that uses LR earthworms was 33.
Universitas Diponegoro
2021-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/40978
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 3 (2021): November 2021
eng
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/40978/126220
https://ejournal.undip.ac.id/index.php/presipitasi/article/download/40978/126221
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/16426
2020-04-17T18:35:32Z
presipitasi:RSA
"180329 2018 eng "
2550-0023
1907-817X
dc
Studi Pemanfaatan Limbah Padat Industri Pengolahan Minyak Kelapa Sawit Spent Bleaching Earth sebagai Pengganti Agregat pada Campuran Beton
Dermawan, Denny
Program Studi Teknik Pengolahan Limbah, Politeknik Perkapalan Negeri Surabaya http://sinta2.ristekdikti.go.id/authors/detail%20id=59781888view=overview
Ashari, Mochammad Luqman
Program Studi Teknik Pengolahan Limbah, Politeknik Perkapalan Negeri Surabaya
Array
Palm oil refinery factory has solid waste by product called Spent Bleaching Earth (SBE). SBE consists of some chemical compounds and one of them is SiO2 up to 83,05%. SiO2 or silica fume can cause silicosis if it is exposed to the atmosphere and frequently inhaled by the workers. On the other hand, SiO2 is one of the material composition of Portland cement. Thus, it is necessary to conduct a research about the utilization of SBE. as a concrete mixture. SBE is utilized as fine aggregate substitution by the composition of 0%, 10%, 20%, 30%, and 40% of the total amount of fine aggregate. The conducted tests are fineness modulus calculation, compressive strength, setting time, and TCLP. The method used for mix design is SNI 03-2834-2000 with f’c 28,5 MPa and slump 12 ± 2 cm. This research shows that concretes with SBE substitution which achieve the planned compressive strength are 10% SBE with 34,16 MPa and 20% SBE with 29,06 MPa. Based on the TCLP test, the concentration of heavy metal substances in 10% SBE are below the standard. Thus, it is scientifically proven to conclude that concrete with 10% SBE is technically proper and safe for the environment.
Universitas Diponegoro
2018-03-29 12:24:08
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/16426
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 1 (2018): Maret 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/42960
2023-03-30T04:11:54Z
presipitasi:RSA
"220730 2022 eng "
2550-0023
1907-817X
dc
Analysis on Waste to Energy Potential of Padang Municipal Solid Waste for Sustainable Future
Raharjo, Slamet
Universitas Andalas
Ariska, Zagita Andriani
Universitas Andalas
Array
Reduce, reuse, recycle (3R), and recovery are types of waste processing regulated in Law No. 18 of 2008. One form of recovery is Waste to Energy (WtE) which is one of the national development priorities. Currently, the implementation of 3R is less than 5% and it has not been implemented at all in Padang City. Therefore, this current research studies the WtE potential of Padang municipal solid waste. The research was conducted by collecting data on the population of Padang City, the generation, composition, and recycling potential of Padang City waste, and the calorific value of each waste composition. This research applies thermal incineration technology with three variations of scenarios. Scenario #1 is a WtE application with 3R based on existing conditions, scenario #2 is a WtE application with 3R based on government targets, and scenario #3 is a WtE application with 3R based on the results of the questionnaire. Scenario #2 is the best one because it considers the WtE idea and community-based 3R recycling in line and continues for better waste management in Padang City. The scenario may produce 394.23 MW of electricity that can serve around 1,329 houses, while also improving the 3R rate of around 1.98% per year.
Universitas Diponegoro
2022-06-16 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/42960
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 2 (2022): July 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20789
2020-04-17T18:36:53Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
PENGELOLAAN LIMBAH BAHAN BERBAHAYA DAN BERACUN (B3) STUDI KASUSPT. HOLCIM INDONESIA, TBK NAROGONG PLANT
Utami, Khurnia Tri
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro Jl. Prof. H. Soedarto, S.H. Tembalang, Semarang, Indonesia 50275
Syafrudin, Syafrudin
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro Jl. Prof. H. Soedarto, S.H. Tembalang, Semarang, Indonesia 50275
Array
PT Holcim Indonesia, Tbk merupakan perusahaan yang bergerak di bidang industri semen. Dalam kegiatan produsksinya, PT Holcim Indonesia, Tbk menghasilkan limbah bahan berbahaya dan beracun (B3), baik limbah padat maupun limbah cair. Pengelolaan limbah bahan berbahaya dan beracun tersebut berpedoman pada Peraturan Pemerintah No 101 tahun 2014 tentang Pengelolaan Limbah Bahan Berbahaya dan Beracun. Pengelolaan limbah padat bahan berbahaya dan beracun (B3) yang dilakukan oleh PT Holcim Indonesia, Tbk meliputi identifikasi dan inventarisasi, pengemasan, pelabelan dan pemberian simbol, penyimpanan, pengangkutan internal maupun kepada pihak ketiga dan pemanfaatan limbah B3. PT Holcim Indonesia Tbk. memanfaatkan sebagian besar limbah B3 yang dihasilkan dan limbah B3 dari pihak ketiga untuk digunakan sebagai substitusi bahan bakar maupun bahan baku di dalam proses produksi. Pemanfaatan yang dilakukan sesuai dengan peraturan dan izin yang berlaku.
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20789
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/15205
2017-07-15T23:01:50Z
presipitasi:RSA
oai:ojs.ejournal.undip.ac.id:article/23236
2020-04-17T18:38:33Z
presipitasi:RSA
"190731 2019 eng "
2550-0023
1907-817X
dc
Penerangan Jalan Umum Tenaga Surya: Studi Kasus di Kota Pangkalpinang
Febrianto, Andika
Universitas Bangka Belitung
Sunanda, Wahri
Universitas Bangka Belitung
Gusa, Rika Favoria
Universitas Bangka Belitung
Array
This research was conducted to design public street lighting photovoltaic, based on SNI 7391:2008 concerning specifications of public street lighting in urban areas with several parameters that were considered by poles, lights used, intensity of light needed, number of lights needed and supporting equipment for public street lighting photovoltaic. Currently, Jenderal Sudirman road in the city of Pangkalpinang along 1.5 km uses electricity from PLN with 30 units of 150 watt SON lamps and 11 lux light intensity. The design obtained for street lighting photovoltaic while still meet SNI for light intensity, obtained supporting equipment for solar street lighting, namely 31 unit of 8 meter octagonal poles with specifications of 40 watt LED lights for each cross arm, 1 unit of 100 Wp solar panels, unit of 100 Ah VRLA batteries and 1 unit of solar charger controller (10A, 12V / 24V).
Universitas Diponegoro
2019-07-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/23236
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 2 (2019): Juli 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/53248
2023-12-15T15:37:28Z
presipitasi:RSA
"231201 2023 eng "
2550-0023
1907-817X
dc
Comparison of Physical Properties and Strength of Geopolymer Mortar with White Soil Substitution and Mortar with Portland Pozzolan Cement under Corrosive Seawater Conditions
Priastiwi, Yulita Arni
Universitas Diponegoro https://goo.gl/jIH1NE https://orcid.org/0000-0002-8116-3228
Adi, Rudi Yuniarto
Universitas Diponegoro
Hidayat, Arif
Universitas Diponegoro
Hanif, Abi Nabil
Universitas Diponegoro
Bima, Bima
Universitas Diponegoro
Array
Construction also causes environmental pollution due to excessive cement production, so an alternative to cement is needed. Geopolymer is considered an alternative material to replace cement. This research compares three variations of mortar (PPC, geopolymer, and geopolymer with white soil) in a seawater environment. Research in the laboratory with 5x5x5 cm mortar specimens and test parameters for porosity, compressive and direct tensile strength, density, and absorption has been carried out. Microstructure due to immersion effect was also carried out but only on MGT15 mortar. The results showed that the PPC mortar had the highest compressive and tensile strength among the three variations, namely 27.80 MPa and 2.540 MPa at 28 days of age, the most negligible porosity and absorption were 1.124% and 76 gram/100cm2, and increased density after immersion. However, when immersing for 56 days, the decrease in strength reached 21%, while geopolymer mortar tended to be stable and even increased to 19%. Microstructure tests in the form of SEM and EDX on MGT15 showed the effect of seawater immersion, such as the presence of cracks, ettringite, and bad reactions. Soaking in seawater caused a decrease in some mortar strength supporting compounds and the appearance of 0.3% free chloride at 28 days of immersion.
Universitas Diponegoro
2023-12-01 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/53248
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 3 (2023): November 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/57651
2024-02-21T11:11:06Z
presipitasi:RSA
"240331 2024 eng "
2550-0023
1907-817X
dc
Risk Factors of Unsafe Behavior among Construction Workers
Putri, Sindy Septyana
Universitas Negeri Semarang
Wahyuningsih, Anik Setyo
Universitas Negeri Semarang
Array
Globally, construction is considered the riskiest industry and construction workers have twice the risk of injury than workers in other jobs. PUPR Ministry data for 2017 states that construction is the largest contributor to accident cases in Indonesia with an average incidence of 32% each year. Unsafe behavior is the most common cause of work accidents. Based on observations, it was found that workers engaged in unsafe behavior in the Pekalongan City tidal food control project with an average incidence of 15% per day. This study aims to determine what factors are associated with unsafe behavior. The type of research used is analytic observational with a cross sectional approach and the sampling technique uses simple random sampling. The population of this study was 115 workers and the sample size was determine using the Slovin formula (error rate of 5%) obtained by 95 respondents. The research instruments used questionnairs and observation sheets. The results of the bivariate analysis showed that there was a significant connection between knowledge (p=0.006), supervision (p=0.000), and fatigue (0.000) on unsafe behavior. The results of the multivariate analysis show that supervision is the most powerful factor influencing unsafe behavior.
Universitas Diponegoro
2023-11-15 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/57651
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Article in Press 2024
eng
Copyright (c) 2024 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/24994
2020-08-31T05:28:29Z
presipitasi:RSA
"200331 2020 eng "
2550-0023
1907-817X
dc
RETRACTED: Analysis of Physical-Chemical Parameters for Mangrove Ecosystem Rehabilitation in Bungkutoko Island, Kendari City
Yasin, Asramid
Universitas Halu Oleo http://sinta2.ristekdikti.go.id/authors/detail?id=5979653&view=overview
Pristya, Terry Y. R.
Universitas Pembangunan Nasional Veteran Jakarta http://sinta2.ristekdikti.go.id/authors/detail?id=6151115&view=overview
Array
Retraction Notification
After going through a careful process of review and attention to the article that have been published in Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan, Volume 17 Issues 1 pp 1-18 in March 2020, the editor board decided to retract this article because of its violence to the Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan's ethical code.
This article has been submitted at the same time in the Journal of Green Growth and Environmental Management. Before being published, we have made an effort to detect plagiarism using the turnitin application twice, on 30 November 2019 (23% of similarity) and 30 August 2019 (18% of similarity). On January 2, 2020, the corresponding author corrected and editted the article and the Editor published the article in the "Article in press" issue. Subsequently, the article was published in Volume 17 No. 1 of March 2020.
We have corresponded with the authors and the authors declare their willingness to revoke their articles at Jurnal Green Growth dan Manajemen Lingkungan. As long as the article has not been revoked from the Jurnal Green Growth dan Manajemen Lingkungan, the document and its contents removed from the Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan.
Abstract
In Southeast Sulawesi rehabilitation of mangrove areas that have been damaged but in reality not all mangrove rehabilitation activities were successful, this was allegedly caused by a mismatch in the type of mangrove and incompatibility of rehabilitation techniques used with environmental conditions or parameters of the local coastal environment. This study is aimed to analyze the condition of coastal environmental parameters in Bungkutoko island, district of Abeli in rehabilitation proposed of mangrove ecosystem and to find a proper rehabilitation strategy for it can be applied in that area. This study was carried on June to July 2009 in the coastal of Bungkutoko island, Abeli district, Kendari Town. Data in this study is analyzed as descriptively for giving common view of that area. The measurement results of several physical-chemical parameters on the coast of Bungkutoko island at stations I, II and III are suitable for mangrove ecosystem rehabilitation activities, which have a slope of the base: flat and sloping, particle size: small substrate, binding capacity of substrate particles: moderate to loose, confinement coastline: protected and semi protected and open, wave: relatively small, sea level deviation: moderate, tidal type: mixture tends to double daily, current speed: weak, sediment suspension: normal and salinity: 25-35 ppt. Also pay attention to the right planting time on the condition of mangrove tree is in having fruits and calm water condition of sea. And for planting technic is propaguls directly planted to the ground and using seeds on the polybags.
Universitas Diponegoro
2020-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/24994
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 1 (2020): Maret 2020
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/33440
2020-12-17T04:32:59Z
presipitasi:RSA
"201130 2020 eng "
2550-0023
1907-817X
dc
Drying Bed Volume Design Analysis for Reducing Environmental Impact of WTP Residuals
Sari, Deasy Ambar
Universitas Gadjah Mada
Kamulyan, Budi
Universitas Gadjah Mada
Triatmodjo, Bambang
Universitas Gadjah Mada
Array
Bak pengering lumpur atau Sand Drying Bed (SDB) digunakan untuk mengendalikan potensi dampak lingkungan akibat residu lumpur IPA. Pedoman SNI yang ada saat ini belum cukup mudah diterapkan oleh perencana dalam menentukan volume kebutuhan bak SDB, dikaitkan dengan kapasitas IPA dan kondisi air baku. Penelitian ini kemudian bertujuan untuk menganalisis produksi lumpur dari suatu IPA yang berguna sebagai referensi dalam penetapan dimensi SDB. Penelitian dilakukan pada unit IPA di D.I Yogyakarta yang menggunakan air baku Sungai Progo, yaitu IPA Pajangan (kapasitas 50 liter/detik) dan IPA Kartamantul-Sistem Bantar (kapasitas 400 liter/detik). Produksi lumpur dianalisis berdasarkan data kekeruhan air baku, simulasi fluktuasi kadar TSS (Total Suspended Solid) air baku dan dosis bahan koagulan, serta uji massa jenis lumpur kering dan uji imhoff residu dari IPA. Berdasarkan penelitian diperoleh hasil bahwa lumpur kering yang dihasilkan dari IPA Pajangan diperkirakan mencapai 244,55 m3/tahundari total volume air kurasan residu lumpur sebesar 43.158,52 m3/tahun(atau 2,365 m3/hari residu lumpur untuk tiap liter produksi air baku). Sementara lumpur kering dari IPA Kartamantul mencapai 1.550,49 m3/tahundari total volume air kurasan residu lumpur sebesar 273.635,22 m3/tahun (atau 1,874 m3/hari residu lumpur untuk tiap liter produksi air baku). Produksi lumpur yang cukup besar ini menyebabkan volume bak SDB kedepan perlu direncanakan dengan lebih baik.
Universitas Diponegoro
2020-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/33440
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 17, No 3 (2020): November 2020
ind
Copyright (c) 2020 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/35460
2022-02-16T10:29:41Z
presipitasi:RSA
"210331 2021 eng "
2550-0023
1907-817X
dc
Wantoputri, Noviani Ima
Universitas Islam Indonesia
Helmy, Qomarudin
Notodarmojo, Suprihanto
The textile industry is one of the industries that discharge an enormous quantity of highly colored wastewater because of the large amount of water used in the process. Textile wastewater is the potential to polluting the environment due to the high color contained in it. One of the problems in processing textile wastewater with conventional treatment methods is the ineffectiveness of color removal. A post-treatment is needed for treated wastewater to remove the color. One of the methods is by using the ozonation method. In this preliminary study, the decolorization of artificial textile wastewater containing azo dye reactive-black 5 (RB5) from secondary treatment was investigated in a batch system. Artificial treated textile wastewater from secondary biological treatment was made using 5,26 mg/L azo dye RB5 in 16 L volume of the reactor. The preliminary batch study showed that the optimum color removal achieved in 24.66 mg/minute ozone dose in a batch system with 20,89 mg/minute ozone consumption. Within 5 minutes of ozonation, color removal achieved was 100%, and COD removal achieved was 75%.
Universitas Diponegoro
2021-03-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/35460
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 1 (2021): March 2021
ind
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/12484
2020-04-17T18:33:05Z
presipitasi:RSA
"161029 2016 eng "
2550-0023
1907-817X
dc
KONTRIBUSI PARAMETER METEOROLOGI DAN KONDISI LALU LINTAS TERHADAP KONSENTRASI PENCEMAR NO2 DI KOTA SEMARANG
Istirokhatun, Titik
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Ratnasari, Elaeis Noviani
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Utomo, Sudarno
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro http://www.enveng.undip.ac.id/id/?page_id=85
Array
Air pollution and its public health effects are drawing increasing concern from the environmental health research community, environmental regulatory agencies, industries as well as public. Nitrogen dioxide (NO2) is one of those common air pollutants that potentially major cause health problems. Transportation contributed most of the air pollution. In addition, the number of vehicles that are passing and queuing on the crossroads because of traffic light can affect the concentration of NO 2. Besides, in these places there are a lot of road users which are potentially exposed by contaminants, so information about the concentration of NO2 on road side is important to know. This study aimed to investigate the impact of meteorological factors and the number of vehicles on NO2 concentrations. Impinger fritted bubler was used for air sampling, and Griess Saltzman method was used for determining NO2 concentration. Sampling and calculation of the number of passing vehicles were performed 3 times ie in the morning, afternoon and evening. Based on the results of the study, the highest concentrations of NO2 were on the range of 0.7-4.2 mg/Nm3.
Universitas Diponegoro
2016-10-29 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/12484
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 13, No 2 (2016): September 2016
eng
Copyright (c) 2016 Jurnal Presipitasi
oai:ojs.ejournal.undip.ac.id:article/39758
2022-02-16T10:26:18Z
presipitasi:RSA
"210731 2021 eng "
2550-0023
1907-817X
dc
Utilization of Spent Nickel Catalyst as Raw Material for Ni-Rich Cathode Material
Nisa, Shofirul Sholikhatun
Universitas Sebelas Maret
Nurohmah, Anisa Raditya
Universitas Sebelas Maret
Yudha, Cornelius Satria
Universitas Sebelas Maret
Nilasary, Hanida
PT. Pertamina
Nursukatmo, Hartoto
PT. Pertamina
Dyartanti, Endah Retno
Universitas Sebelas Maret
Purwanto, Agus
Universitas Sebelas Maret
Array
Spent nickel catalyst will be harmful to the environment if it is not processed or used properly. In fact, this waste still has a high nickel content. The treatment of spent nickel catalysts has been widely reported, but limited to nickel extraction. Since the lithium-ion batteries demand is continued to increase, then nickel is the most sought-after metal. Consequently, nickel from spent nickel catalysts could be developed as secondary source for lithium-ion battery cathode. This study aims to utilize spent nickel catalysts into more valuable materials. Nickel that has been extracted and mixed with Mn and Co has been used as raw material for nickel-rich cathode, namely NMC. Nickel extraction and NMC synthesis were using the acid leaching method followed by co-precipitation[WI1] [SSN2] . Based on the functional test performed in this work, nickel from spent nickel catalyst can be applied to Li-ion batteries. The sintering temperature that gives good characteristics and electrochemistry was found 820oC. The galvanostatic charge-discharge test gave specific capacity results for NMC of 110.4 mAh/g. The cycle test showed that NMC synthesized from spent nickel catalyst can be carried out up to 50 cycles with a capacity retention of 87.18%.
Universitas Diponegoro
2021-07-31 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/39758
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 18, No 2 (2021): July 2021
eng
Copyright (c) 2021 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/16015
2020-04-17T18:34:51Z
presipitasi:RSA
"171109 2017 eng "
2550-0023
1907-817X
dc
Kesetimbangan Energi dan Manfaat dalam Aplikasi Produksi Bersih di Sistem Pengolahan Limbah Cair Industri Nanas Kaleng
Andarani, Pertiwi
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Sari, Mega Mutiara
Program Studi Teknik Lingkungan, Universitas Pertamina
Siallagan, Afni
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Industri pengolahan buah umumnya memiliki kadar organik yang tinggi, Salah satunya adalah industri pengolahan nanas. PT Great Giant Pineapple, Lampung, (PT GGP) merupakan produsen nanas kaleng ekspor yang menghasilkan limbah yang berpotensi mencemari lingkungan apabila tidak dikelola dengan baik. Salah satu upaya pengelolaan lingkungan dan perbaikan berkelanjutan, PT GGP berupaya melaksanakan sistem produksi bersih. Produksi bersih merupakan suatu strategi pengelolaan lingkungan yang bersifat preventif dan terpadu yang perlu diterapkan secara terus menerus pada proses produksi dan daur hidup produk dengan tujuan megurangi resiko terhadap manusia dan lingkungan. Tujuan dari penelitian ini adalah untuk menganalisis kesetimbangan energi dan manfaat secara kuantitatif dalam penerapan sistem produksi bersih di sistem pengolahan limbah cair PT GGP. Kesetimbangan energi dianalisis dengan menggunakan indikator NER (Net Energy Ratio) dan NEP (Net Energy Production). Manfaat finansial dari penggunaan kembali sludge juga dievaluasi secara kuantitatif. Dalam produksi biogas jumlah energi input yang dibutuhkan sebesar 1,002 MJ/hari/m3 air limbah, menghasilkan jumlah energi output sebesar 108,587 MJ/hari/m3 air limbah. Sehingga Nilai NER = 108,37 dan NEP = 17,585 MJ/hari/m3 air limbah. Sementara itu, dengan pemanfaatan Sludge atas perusahaan memperoleh keuntungan sebesar Rp 3.326.687.65/hari dan pemanfaatan sludge bawah memperoleh keuntungan sebesar Rp 19.054.592 /hari pada tahun 2015.
Universitas Diponegoro
2017-11-09 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/16015
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 14, No 2 (2017): September 2017
eng
Copyright (c) 2017 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/44245
2022-12-15T03:16:03Z
presipitasi:RSA
"220330 2022 eng "
2550-0023
1907-817X
dc
Utilization of Bottom Ash as an Adsorbent for Color and COD Removal for Textile Industry Waste
Fadilla, Pricilla Jihan
Institut Teknologi Nasional Bandung
Sururi, Mohamad Rangga
Institut Teknologi Nasional Bandung
Marganingrum, Dyah
Badan Riset dan Inovasi Nasional
Dirgawati, Mila
Institut Teknologi Nasional Bandung
Array
This study investigates the use of bottom ash as an adsorbent with and without chemical activation treatment. This study also determines the effect of pH and stirring speed on the efficiency of bottom ash in the adsorption of color and COD. Bottom ash was ground and sieved by 100 mesh sieves and was activated by hydrochloric acid 2%. The experiments were conducted at pH variations of 6, 8, 10; contact time variations of 30, 60, and 90 minutes; and stirring speeds of 30 and 60 rpm. The most effective adsorption by non-activated adsorbents occurred at the combination of pH six and stirring speed of 60 rpm with the removal efficiency for color 66.30% at a contact time of 90 minutes and for COD 31.55% at a contact time of 30 minutes. While for activated adsorbent, the highest removal for color (77.44%) and COD removal (40.54%) were at pH 6, stirring speed 30 rpm, contact time 30 minutes. The bottom ash was potentially used as an adsorbent for treating wastewater containing high concentrations of color and COD.
Universitas Diponegoro
2022-03-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/44245
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 1 (2022): March 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/20778
2020-04-17T18:36:35Z
presipitasi:RSA
"180901 2018 eng "
2550-0023
1907-817X
dc
POTENSI GAS RUMAH KACA CO2 PADA PENGOLAHAN MUNICIPAL SOLID WASTE DENGAN METODE BIODRYING
Hardyanti, Nurandani
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Hadiwidodo, Mochtar
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Saraswati, Lutfi
Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro
Array
Jumlah sampah di Indonesia semakin meningkat, seiring dengan peningkatan jumlah penduduk. Namun, pengolahan sampah di Indonesia masih berupa penimbunan sampah di TPA yang menimbulkan dampak negatif bagi lingkungan. Oleh karena itu diperlukan suatu pengolahan sampah alternatif yang dapat meminimalisir pencemaran salah satunya adalah pencemaran udara. Biodrying merupakan salah satu metode yang menawarkan solusi berkelanjutan untuk pengolahan sampah perkotaan. Namun, proses biodrying masih menghasilkan gas rumah kaca. Tujuan penelitian ini adalah untuk mengetahui bagaimana pengaruh penambahan debit udara dan variasi debit udara terhadap parameter emisi gas rumah kaca, terutama CO2 pada pengolahan Municipal Solid Waste (MSW) dengan metode biodrying dan mengetahui berapa besar debit udara yang optimum untuk menghasilkan emisi gas CO2 yang paling minimum pada pengolahan Municipal Solid Waste (MSW) dengan metode biodrying. Variasi debit udara pada penelitian ini adalah 0 l/m, 2 l/m, 3 l/m, 4 l/m, 5 l/m dan 6 l/m. Pengambilan sampel emisi dilakukan pada hari ke-1,ke-2, ke-15 dan ke-30. Hasil dari penelitian ini adalah proses biodrying menghasilkan emisi dengan rata-rata CO2 sebesar 6214,66 ppm. Penambahan debit udara pada proses biodrying mampu menurunkan emisi CO2 sebesar 74,5%. Debit optimum yang diperoleh dari penelitian ini adalah sebesar 6 liter/menit
Universitas Diponegoro
2018-10-24 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/20778
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 15, No 2 (2018): September 2018
eng
Copyright (c) 2018 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/47013
2023-01-04T09:30:50Z
presipitasi:RSA
"221130 2022 eng "
2550-0023
1907-817X
dc
Utilization of Rubber Factory WWTP Muds as Fertilizer for Rubber Plant Clone PB 260 (Hevea Brasiliensis Muell. Arg)
Maryani, Anis Tatik
Universitas Jambi
Dewi, Suri Setyaningsih
Universitas Jambi
Elsa Fathia, Nyimas Mirna
Universitas Jambi
Wibowo, Yudha Gusti
Institut Teknologi Sumatera https://scholar.google.co.id/citations?user=rF1M_60AAAAJ&hl=id https://orcid.org/0000-0003-1013-7732
Array
The rubber plant (Hevea brasiliensis Muell. Arg) is an important plantation crop in Indonesia because it is one of the non-oil and gas products that are a source of large amounts of foreign exchange income for the country. Experiment was arranged in a Randomized Block Design with one factor, namely Compost for Wastewater Treatment Plant (WWTP) sludge from a rubber factory which consisted of 5 treatment levels. Statistical analysis was carried out using variance (ANOVA). Variables observed in rubber plants were an increase in bud grafting length, plant diameter, the number of leaves, shoot dry weight, and root dry weight. The results showed that the WWTP waste compost from the rubber factory affected the growth of rubber seedlings, as shown in the variable length of grafting shoots, the number of leaf stalks (strands), and the dry weight of the plant crown. Meanwhile, the increase in stem diameter and dry weight of plant roots showed no significant effect on the observed variables.
Universitas Diponegoro
2022-11-30 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/47013
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 19, No 3 (2022): November 2022
eng
Copyright (c) 2022 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/22367
2020-04-17T18:37:54Z
presipitasi:RSA
"190617 2019 eng "
2550-0023
1907-817X
dc
Penentuan Rasio Bahan Sampah Organik Optimum Terhadap Kinerja Compost Solid Phase Microbial Fuel Cells (CSMFCs)
Ariyanti, Meishinta
Universitas Diponegoro
Samudro, Ganjar
Universitas Diponegoro
Handayani, Dwi Siwi
Universitas Diponegoro
Array
Compost Solid Phase Microbial Fuel Cells (CSMFCs) merupakan teknologi pengomposan yang diintegrasikan dengan sistem MFCs untuk menghasilkan kompos dan produksi biolistrik dari sampah padat organik. Penelitian ini bertujuan untuk meningkatkan kinerja CSMFCs melalui penerapan perlakuan optimal dari penelitian terdahulu seperti, kadar air 60%, volume sampah 2/3 reaktor, dan penambahan bioaktivator. CSMFCs dalam penelitian ini dilakukan dalam kondisi batch menggunakan reaktor tipe single chamber dan dual anode graphene. Sampah daun dan sampah sisa makanan digunakan sebagai substrat dalam studi ini. Bahan sampah tersebut divariasikan berdasarkan rasio bahan (sampah daun:sampah sisa makanan) yaitu 100:0, 0:100, dan 50:50. Hasil penelitian ini menunjukan kinerja CSMFCs yang optimum terdapat pada variasi sampah campuran keduanya dengan rasio bahan 50:50. Variasi ini dapat menghasilkan kompos yang baik, yaitu memenuhi SNI 19-7030-2004, serta produksi listrik yang cukup tinggi yaitu power density 41,6 mW/m2, coulombic efficiency 0,647% dan energy efficiency 0,0127%.
Universitas Diponegoro
2019-06-17 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/22367
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 1 (2019): Maret 2019
eng
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/54294
2023-08-18T09:24:32Z
presipitasi:RSA
"230730 2023 eng "
2550-0023
1907-817X
dc
Physical and Chemical Treatability Assessment for Food Industry Wastewater in Wastewater Treatment Plant Design
Oktiawan, Wiharyanto
Universitas Diponegoro
Junaidi, Junaidi
Universitas Diponegoro
Raziani, Fadhila
Universitas Diponegoro
Array
Food industry wastewater has characteristics that contain high organic matter and suspended solids. Most of the methods used are physical and chemical treatment because these methods have high efficiency and effectivity. In designing a new wastewater treatment plant, the treatability assessment is essential to any consideration or reference in planning the treatment process to be implemented. This research aims to obtain treatability assessment results that will be used as consideration in planning treatment units in WWTP according to the characteristics of wastewater tested. The removal results of the sedimentation test with Imhoff Cone were able to remove 51.2% COD, 64.04% BOD, and 95.21% TSS with the optimum settling time of 40 minutes. The samples test continued to the rapid-slow mixing test using the jar test, resulting that by adding coagulant at the optimum dose of PAC 120 mg/L, it was capable to remove 68.21% of COD, 73.22% of BOD, and up to 98.07% of TSS at the end of the process. Based on the assessment results, the physical and chemical treatment can remove suspended solids pollutant parameters with high efficiency so it will be considered to be used in planning Wastewater Treatment Plants for this food industry.
Universitas Diponegoro
2023-08-01 00:00:00
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https://ejournal.undip.ac.id/index.php/presipitasi/article/view/54294
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 20, No 2 (2023): July 2023
eng
Copyright (c) 2023 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
oai:ojs.ejournal.undip.ac.id:article/26543
2020-08-31T06:24:16Z
presipitasi:RSA
"191130 2019 eng "
2550-0023
1907-817X
dc
The Potential of Stale Milk to Become Organic Fertilizer with the Addition of Effective Microorganism 4 and Cocopeat Solutions
Triwuri, Nurlinda Ayu
Politeknik Negeri Cilacap
Dwityaningsih, Rosita
Politeknik Negeri Cilacap
Handayani, Murni
Politeknik Negeri Cilacap
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During this time, the remaining milk that has been consumed only wasted. Milk content is strongly associated with nutrients to increase crop productivity. This requires innovations in the manufacture of organic fertilizer products. The purpose of this study was to determine the best composition comparison between stale milk, EM4 solution and cocopeat in the process of making liquid and solid organic fertilizer and determine the c-organic value, Ntotal, P2O5total, K2Ototal, and pH value. Initial analysis of liquid organic fertilizer obtained pH values of 5.10, P2O5total of 0.342% and Ntotal of 0.569% at initial control (stale milk only) and final values of 1.010% of P2O5total, 1.113% of Ntotal and 10.480% of organic carbon in R3 ( 30: 5: 1). Initial analysis of solid organic fertilizer obtained pH values 5.26%, 2.668% P2O5total, 0.952% K2Ototal and 2.780% Ntotal at R1 (10: 5: 1) and final values obtained 1.578% P2O5total at R1 (10: 5: 1) , 2.937% Ntotal in R2 and 43.912% carbon organic in R3. This shows that stale milk with the addition of EM4 and cocopeat solutions has an effect on phosphorus and nitrogen nutrients in liquid and solid organic fertilizer.
Universitas Diponegoro
2019-11-07 00:00:00
application/pdf
https://ejournal.undip.ac.id/index.php/presipitasi/article/view/26543
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan; Vol 16, No 3 (2019): November 2019
ind
Copyright (c) 2019 Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan