2024-03-29T00:47:31Z
https://ejournal.undip.ac.id/index.php/index/oai
oai:ojs.ejournal.undip.ac.id:article/45786
2022-04-14T08:38:10Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/45786
2022-04-14T08:38:10Z
Waste Technology
Vol 10, No 1 (2022); 43-49
The Effect of Disposable Mask Waste on Environmental Pollution in the Pandemic Era in Surakarta City
Hawali Abdul Matin, Hashfi; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Ashila, Jilan; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
A’yuni Fatikha, Layyinatussyifa; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Shofa Azizia, Maulyda; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Fadhillah Armando, Muhammad; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Reynaldi Putrayuda, Muhammad; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Wahyu Silaningtyas, Nimas; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
2022-04-14 08:38:09
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/45786
Covid-19, medical masks, waste, B3 waste, pollution
en
The Covid-19 virus was recorded to have been found in Indonesia since March 2, 2020. This virus is a virus that is easily contagious, so it is one of the efforts to prevent transmission by using a mask. so that everyone is required to wear a medical or non-medical mask when doing activities outside the home. Of the two types of masks that are more often used, namely the type of medical masks that are used because they are considered safer and more comfortable than non-medical masks. However, after use, the mask turns into the garbage which is classified as B3 waste. Hazardous waste has different characteristics and properties from waste in general because it is unstable, reactive, explosive, flammable, and toxic. In this case, once the mask waste is immediately disposed of without processing, the environment can be explained. Therefore, this study was conducted with the aim of knowing the effect of disposable medical waste on environmental pollution during the pandemic era in Surakarta City. The method used in this study is a questionnaire method which was conducted through online media surveys targeting people aged 17-25 years and supported by data from indexed literature studies. The results of this study indicate that out of a total of 45 respondents, the community is very aware of B3 waste (80%), knows that B3 waste is harmful to health (100%), likes disposable medical masks (58%), understands disposable medical waste including B3 waste. (82%). Meanwhile, for the management of disposable mask waste, it shows that people still store medical mask waste at home (93%), understand the proper disposal of disposable mask waste (78%), have not differentiated it from other waste (60%), have not implemented 3R (76%) ) ), cutting medical waste before disposal (78%), understanding that medical mask waste is harmful to the environment (100%).
oai:ojs.ejournal.undip.ac.id:article/53268
2023-06-06T16:16:54Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/53268
2023-06-06T16:16:54Z
Waste Technology
Vol 11, No 1 (2023); 52-55
Liquid Soap Formulation from Virgin Coconut Oil (VCO) With the Addition of Butterfly Pea (Clitoria ternatea L) Extract
Setyaningrum, Wati; Diponegoro University
Broto, Wisnu; Diponegoro University
2023-05-12 05:53:54
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/53268
utilization, factorial design, optimization
en
In Indonesia, several types of soap have started to spread evenly. One type of soap that is popularly used by Indonesian people is liquid soap. In the manufacture of liquid soap requires the same main raw materials, namely oil/fat and KOH alkaline base. One of the most frequently used oils/fats is virgin coconut oil (VCO). In addition, to increase the usefulness of soap, active ingredients are also needed. Natural/plant active ingredients such as butterfly pea flowers are a solution to reducing the use of chemical active ingredients. This butterfly pea plant has several good ingredients for skin health. Therefore, the manufacture of liquid soap with butterfly pea flower extract was carried out. This study used a factorial design method to determine the optimal liquid soap formulation. With several independent variables used, including KOH concentration, VCO concentration and the length of time of stirring, the results of soap that met SNI were obtained from testing for pH, viscosity, free alkali content, density and water content. The optimal formulation for making butterfly pea flower extract liquid soap is at a concentration of 20% KOH, with a concentration of 50% VCO and a stirring time of 45 minutes.
oai:ojs.ejournal.undip.ac.id:article/7220
2015-02-17T13:19:27Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/7220
2015-02-17T13:19:27Z
Waste Technology
Vol 2, No 2 (2014); 26-30
Study of Biogas Production Rate from Water Hyacinth by Hydrothermal Pretreatment with Buffalo Dung as a Starter
Kurniawan, Teguh; Universitas Sultan Ageng Tirtayasa
Putra, Yuhelsa; Agriculture Department, Universitas Sultan Ageng Tirtayasa, Serang, Indonesia
Murni, Dewi; Biological Department, Universitas Sultan Ageng Tirtayasa, Serang, Indonesia
2014-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/7220
Biogas; Hydrothermal pretreatment; Water hyacinth; Buffalo dung
Universitas Sultan Ageng Tirtayasa
en
In this paper we report the effects of hydrothermal pretreatment on biogas enhancement production rates from water hyacinth mixed with buffalo dung. The focus of the experiment was on the time of hydrothermal pretreatment and the ratio of water hyacinth with buffalo dung. The hydrothermal pretreated substrates were characterized by TDS, BOD and pH. The hydrothermal pretreatment of 60 minutes with the ratio of water hyacinth to buffalo dung 1:2 showed the highest biogas production rate at 7889 ml/day. However, the highest methane composition was 52.82% which resulted on the hydrothermal treatment of 30 minutes with equal ratio of water hyacinth and buffalo dung. Thus, the optimum of methane yield obtained at hydrothermal pretreatment for 30 minutes with equal ratio of water hyacinth to buffalo dung is 2856 ml/day. The hydrothermal pretreatment increases the rate production of biogas 102% and the methane yield 51% relative to untreated water hyacinth. The ratio of water hyacinth and buffalo dung has a great impact on biogas production rate and compositions for hydrothermal pretreated substrates.
oai:ojs.ejournal.undip.ac.id:article/10521
2016-07-27T21:52:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/10521
2016-07-27T21:52:36Z
Waste Technology
Vol 4, No 1 (2016); 7-12
Evaluation Of Communal Wastewater Treatment Plant Operating Anaerobic Baffled Reactor And Biofilter
Hendriarianti, Evy; Departement of Environmental Engineering, Sepuluh Nopember Institute of Tecnology, Jl. Raya ITS Keputih Sukolilo, Surabaya 60111
Karnaningroem, Nieke; Departement of Environmental Engineering, Sepuluh Nopember Institute of Tecnology, Jl. Raya ITS Keputih Sukolilo, Surabaya 60111
2016-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/10521
en
Construction of communal Waste Water Treatment Plant, WWTP in city of Malang since 1998 but until recently had never done an evaluation the performance. Communal WWTP performance evaluation is needed to see how far the efficiency of processing result. Until now, Environmental Agency Malang City only measure effluent from WWTP Communal to know the suitability with domestic wastewater quality standards. Effluent quality data in 2014 showed value above the quality standard of domestic wastewater from East Java Governor Regulation No. 72 in 2013 for parameters BOD and COD. WWTP Communal USRI research objects are on a six (6) locations by involving the user community during the planning, construction, operation and maintenance. Technology choice of ABR followed by a biofilter reactor with the stone media proved capable of processing organic matter of BOD and COD with the removal levels respectively by 78% -99% and 71% -99%. As for the parameters of TSS, NO3 and PO4 have the ranges of removal respectively by 56% -100%, (43%) - 72%, (2%) - 13%. Ratio BOD and COD in influent are low and ranged from 0.22 to 0.41. From the evaluation shows that high organic matter concentrations in influent along with the HRT and operation time high will result in a higher removal level
oai:ojs.ejournal.undip.ac.id:article/16244
2018-01-11T21:00:12Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/16244
2018-01-11T21:00:12Z
Waste Technology
Vol 5, No 2 (2017)
THE STUDY ON THE EFFECT OF PROCESS VARIABLES TOWARDS BIOADSORBENT PERFORMANCE OF MODIFIED PALM BUNCH FOR THE REDUCTION OF 3-MCPD ON THE PALM OIL
Wahyuningsih, Wahyuningsih; Diponegoro University
Yulianto, Mohamad Endy; Diponegoro University
Amalia, Rizka; Diponegoro University
Yohana, Eflita; Diponegoro University
2017-12-14 08:09:31
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/16244
Direktorat Riset dan Pengabdian Masyarakat Direktorat Jenderal Penguatan Riset dan Pengembangan Kementrian Riset, Teknologi dan Pendidikan Tinggi
en
Crude palm oil was consumed as a healthy food oil, it contains a 3-monochloro-propane-1,2-diol (3-MCPD) ester in the range of 0.04-0.05 ppm. The 3-MCPD compound is one of the contaminants belonging to the chloropropanol group that is genotoxin carcinogen. The 3-MCPD ester content specification in palm oil is still a polemic, but some EU countries already use it as a barrier of palm oil trade in the European region. It is therefore necessary to develop an integrated palm oil refining through adsorption with a modified palm empty fruit bunch bioadsorbent to reduce 3-MCPD ester (<0.02 ppm / Codex Standard).
oai:ojs.ejournal.undip.ac.id:article/34628
2020-12-12T11:22:53Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/34628
2020-12-12T11:22:53Z
Waste Technology
Vol 8, No 2 (2020); 25-29
The Impact of Pesticides Use on Farmer Health and Environment
Dini Iswandari, Hargianti; Study Program of Medical Informatics, Universitas Widya Husada Semarang (UWHS), Semarang Indonesia
Dina Permana Citra, Ari; Study Program of Optometry, Universitas Widya Husada Semarang (UWHS), Semarang Indonesia
TD Retnaningrum, Okti; Study Program of Medical Informatics, Universitas Widya Husada Semarang (UWHS), Semarang Indonesia
Sugiharto, Sigit; Study Program of Medical Informatics, Universitas Widya Husada Semarang (UWHS), Semarang Indonesia
Zulaika, Chusnul; Study Program of Medical Informatics, Universitas Widya Husada Semarang (UWHS), Semarang Indonesia
2020-11-30 18:33:22
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/34628
Pesticide Use, Health Impact, Environment
en
Pesticides are supporting component in agricultural sector. However, the excessive use of pesticides can have negative impacts on the health of farmers and the environment. This research was conducted in Kebonagung village, Sumowono sub-district to determine the impact of pesticides on health and the environment. The study population was vegetable farmers in Kebonagung Village, Sumowono District. The sample selection technique used purposive sampling method. In-depth interviews were conducted with 10 vegetable farmers and data triangulation was obtained through interviews with the Village Head of Kebon Agung. The results showed that farmers' knowledge was still lacking, farmers did not have awareness of the importance of using personal protective equipment when applying pesticides, pesticide control was carried out once every 6 months but not all farmers received this supervision. The impact of pesticides on health and the environment in Kebonagung village is still relatively light but there are indicators of an imbalance in the ecosystem due to excessive use of pesticides
oai:ojs.ejournal.undip.ac.id:article/41486
2022-07-21T06:38:31Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/41486
2022-07-21T06:38:31Z
Waste Technology
Vol 10, No 1 (2022); 1-6
ELECTROCHEMICAL WASTE WATER TREATMENT
Sakib, S M Nazmuz; *Graduate of BSc in Business Studies
School of Business And Trade
Pilatusstrasse 6003, 6003 Luzern, Switzerland
*Student of BSc in Civil Engineering
Faculty of Science and Engineering
Sonargaon University
147/I, Green Road, Panthapath, Dhaka
*Student of LLB(Hon’s)
Faculty of Law
Dhaka International University
House # 4, Road # 1, Block - F, Dhaka 1213
*Student of BSc in Physiotherapy
Faculty of Medicine
University of Dhaka
Nilkhet Rd, Dhaka 1000
2022-04-14 08:38:06
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/41486
Waster Water; Water Treatment; Waste Water Treatment
en
Wastewater got much of our intention these days because wastewater is polluting our lakes, pounds and even sea have a lot of contaminated amount of waste. This water is hazardous for the acute life, dangerous for living things. Wastewater polluted the natural reservoirs. Over the past, the knowledge of the mechanisms of electrochemical wastewater treatment has progressively evolved. A comprehensive understanding of the types of methods and mechanisms of treatment of wastewater is a prerequisite to the understanding of their relativities and elucidation of intermediate products generated during the oxidation process and degradation pathways. The type, nature, and quantity of reactive species generated in electrochemical treatment processes are controlled by many factors, including the type of the treatment technique, electrode/electro catalyst materials, water/wastewater composition, water pH conditions, and operating parameters are to be considered. Multiple methods such as separation, conversion and combined methods are used for treatment. However, basic principle works on the electrochemical mechanism. This article gives the basic idea of electrochemical methods working principles, techniques being considered. It will also help us understand the by products recovery of different metal ions and how they converted into useful form. Best methods based on the efficiency and economic value. Feasibility of long term and short term methods for the treatment of wastewater.
oai:ojs.ejournal.undip.ac.id:article/50684
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/50684
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 71-75
Chemical Characterization of Instant Powder Based on Dutch Eggplant Peel and Seed Waste Using the Foam Drying Method
Arifan, Fahmi; Industrial Chemical Engineering Technology, Universitas Diponegoro
Broto, Wisnu; Industrial Chemical Engineering Technology, Universitas Diponegoro
Wardani, Oktaviani Kusuma; Industrial Chemical Engineering Technology, Universitas Diponegoro
Fatimah, Siti; Faculty of Public Health, Diponegoro University
2022-12-16 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/50684
Free radicals; foam drying; dutch eggplant; sucrose; organoleptic
en
Chemical content of Dutch eggplant shell waste and seeds Each 500 mL extract contains sugar (0.46), crude fiber (1.98), vitamin C (0.0716), anthocyanin (122.57) and pH (5.9) . Where with some of the ingredients contained in the skin and seeds of Dutch eggplant skin waste and seeds, it can be processed into an instant powder drink that is beneficial to the health of the human body, one of which is preventing free radicals and treating hypertension. This study aims to determine the formulation and specifications of instant drink powder made from waste skins and seeds from waste Dutch eggplant shells and seeds using the foam drying method and the addition of sucrose as a sweetener. In this study the experiments used RAL with 2 times in a row and variable sucrose concentration (10%; 15%; 20%), stirring time (30 minutes; 45 minutes; 1 hour) and a comparison of air and eggplant. (1:1; 1:2; 1:3) In this study the vitamin C test, organoleptic test and fiber test were analyzed. So the result is that the best vitamin test is obtained by adding 10% sucrose with an absorbance value of 0.303. the level of preference of the organoleptic panelists on the variable addition of 20% sucrose and for the highest fiber content was around 30% on the variable addition of 20% sucrose.
oai:ojs.ejournal.undip.ac.id:article/6319
2016-06-11T21:48:53Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/6319
2016-06-11T21:48:53Z
Waste Technology
Vol 1, No 2 (2013); 1-5
Program Analysis and Implementation of Rice Organic Farming System in Semarang Regency
Estuningtyas, Dwi Erlina; Graduate Program of Environmental Science, University of Diponegoro
Izzati, Muniffatul; Graduate Program of Environmental Science, University of Diponegoro
Purnaweni, Hartuti; Graduate Program of Environmental Science, University of Diponegoro
2014-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/6319
farming; evaluation; Semarang Regency; program analysis
en
The Republic of Indonesia Government through the Ministry of Agriculture has launched a program of “Go to Organic 2010” in order to accelerate the development of organic agriculture in some regions of Indonesia. This research aims to study the implementation of organic rice farming systems in District of Susukan, Semarang Regency. Specifically, the objectives of this study were (1) to analyze the program implementation of organic rice farming in the district of Susukan Semarang Regency, and (2) to evaluate the implementation of organic rice farming systems in terms of organic farming standards. The experiment was conducted in the Susukan District of Semarang Regency ranging from April to August 2013. Primary data were obtained from direct observations in the field using a questionnaire at predetermined sample area. Variables observed include correspondence between the implementation of organic rice farming in the community with organic farming criteria. The results showed that the farmers have implemented Organic Rice Farming Systems (ORFS) with a percentage of 83.3 percent and Conventional Farming Systems (CFS) 16.7 percent. The government has had a policy of organic rice farming, among others in the form of socialization in the development of organic rice farming and technical guidance in the development of organic rice farming. In general, community in the Susukan District of Semarang Regency has known environmentally farming of organic rice farming. In the rice farming community has grown organically and still need to be developed. Basically organic paddy cultivation in the district of Susukan District of Semarang Regency actually can not be said to be fully as organic rice farming, or more accurately called as semi-organic farming systems.
oai:ojs.ejournal.undip.ac.id:article/9115
2016-02-05T16:55:19Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/9115
2016-02-05T16:55:19Z
Waste Technology
Vol 3, No 1 (2015); 22-26
Jatibarang Final Solid Waste Dumping Site of Semarang City and Its Problems
Edhisono, Sutarto; Civil Engineering Department, Faculty of Engineering, Diponegoro University
2015-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/9115
TPA Jatibarang, Leachate, pollution
en
Solid waste is big problem in most cities in Indonesia. The problem which often raises, is the difficulty to find the land for solid waste dumping site. The local inhabitants could not accept if the dumping site location is closed to their residential. Therefore, the existing final dumping site is pushed to accommodate and receive solid waste from the entire of the city, although really the service time of the facility is over.This situation is occured on the Jatibarang Final Solid Waste Dumping Site (TPA Jatibarang) of Semarang City, recently.The Municipal of Semarang City, has no other choice for final dumping site exept extending the service time of the TPA Jatibarang. Beside this, the TPA Jatibarang has specific situation, because its location is closed to the Kreo River, one of the tributaries of Garang River, which at the down stream of this river is located intake of the city water supply treatment plant.The leachate of the solid waste is discharged into the Kreo River, which treated by using ordinary aeration method. Of course, this situation is the disadvantage of the TPA Jatibarang. This paper describes the condition of TPA Jatibarang, and its problems and how the efforts of the Municipal of Semarang to overcome this situation.
oai:ojs.ejournal.undip.ac.id:article/12616
2017-10-23T20:54:42Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/12616
2017-10-23T20:54:42Z
Waste Technology
Vol 4, No 2 (2016); 1-8
ASSESSMENT OF THE PHYSICOCHEMICAL SUITABILITY OF OILS AND FRYING FATS RESIDUALS FOR BIODIESEL PRODUCTION
https://ejournal.undip.ac.id/index.php/wastech/article/download/12616/0
https://ejournal.undip.ac.id/index.php/wastech/article/download/12616/29888
Camargo, Rubia Pina Luchetti; Federal University of Goiás
Carrim, Aysha Jussara Ivonilde; Federal University of Goiás
Franco, Pedro Ivo Brandão e Melo; Federal University of Goiás
Antoniosi Filho, Nelson Roberto; Federal University of Goiás
2016-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/12616
Characterization. Gas Chromatography. Recycling. Waste
LAMES, CNPQ, MCTIC, FUNAPE
en
Frying food is a quick and tasty way of cooking, but generate a large amount of residual frying oils and fat (RFOF). However, these residuals can be used for making soap, animal food, and biodiesel. Companies have been increasingly interested in developping green solutions to waste management that control its generation, collection, recycling, and disposal. With the increase of biodiesel demand, RFOFs are increasingly used to produce biofuel instead of soap. However, unwanted residuals of RFOFs need to be cleaned and their physical-chemical characteristics need to be analyzed before they can be used for biodiesel production. RFOF was submitted to a Liquid-Liquid Extraction (LLE) to remove highly oxidized compounds and short-chain free fatty acids. Here, we evaluated the physicochemical characteristics and filtered RFOFs to remove waste to improve biodiesel production. We found that that the liquid-liquid extraction (LLE) and filtration using adsorbent decrease first-order oxidized compounds, like hydroxy-dienone, and decrease water content. Those are key parameters to assess quality of raw material for biodiesel production.
oai:ojs.ejournal.undip.ac.id:article/30432
2020-06-17T23:02:56Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/30432
2020-06-17T23:02:56Z
Waste Technology
Vol 8, No 1 (2020); 12-17
CHARACTERISTICS OF CLARIFICATION PROCESS IN NITRIFICATION – DENITRIFICATION SYSTEM FOR WASTE WATER WITH N-NH3
Setiawan, Ari; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Nugroho, Bayu Hari; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2020-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/30432
activated sludge; ammonia; de-nitrification; nitrification; waste water treatment
en
Research on combinations of activated sludge processes - The clarifier is an attempt to improve the performance of the activated sludge process. In this system, the clearing works as a sediment deposition. The treatment process is expected to operate at a high biomass concentration and produce a compact system for optimal deposition speed. Some of the things covered in this research are, to calculate the rate of sludge deposition in the purifier and to measure the level of water purity or turbidity of the activated sludge treatment process. In this research, synthetic wastewater is used. The ventilation tank is made of plexiglass, with a total volume of 150 Liter. The clarifier is made of plexiglass with an inverted prism shape. The results show that the deposition rate and the degree of purity of water are influenced by the concentration of bacteria Mixed Liquor Suspended Solid (MLSS) or bacteria. The results show that the concentration of MLSS or bacteria increased, the deposition rate decreased. This can be seen in the MLSS 130 ppm which shows faster deposition rate than the MLSS 355 ppm. In the case of turbidity, larger MLSS results, increased turbidity, indicate an accurate flux.
oai:ojs.ejournal.undip.ac.id:article/48671
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/48671
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 28-34
Analysis of Sebelas Maret University Students Insight of Cosmetic Waste Management that has Hazardous and Toxic Content
Hawali Abdul Matin, Hashfi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Amjad Hamy Faqiih, Muhammad; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Yusuf Muharram Bayu Aji, Muhammad; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Puspita Sari, Silvi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Hanum, Ulfi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Maharani Rizky Pratiwi, Vania; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
2022-09-20 13:52:26
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/48671
Cosmetic Waste Management Insight, Hazardous and Toxic Content, Cosmetic Waste
en
Cosmetics contain chemicals including formaldehyde, fragrance and even heavy metals such as lead or mercury. So indirectly cosmetic packaging waste must also contain harmful chemicals and belong to waste B3. Toxic hazardous material waste (waste B3) is waste that contains harmful and toxic substances, so that it can directly or indirectly pollute and damage the environment, disrupt health, and threaten the survival of humans and other organisms. The awareness of students of Universitas Sebelas Maret Surakarta towards B3 waste management can be seen from their understanding of the dangers and how to handle B3 waste in the environment around the residence. An understanding of B3 waste is important in shaping a person's attitude or behavior towards the sustainability of the surrounding environment. The purpose of this study is to find out how much information and knowledge is owned by students of Universitas Sebelas Maret Surakarta related to the management of B3 cosmetic waste in the surrounding environment. The analysis method used in this study is a descriptive analysis method whose descriptive explanation of the data obtained regarding the knowledge of Sebelas Maret University students on B3 cosmetic waste. The data collected is in the form of primary data conducted through questionnaires and secondary data from valid sources. The results showed that the knowledge of students of Universitas Sebelas Maret Surakarta about B3 cosmetic waste was relatively good. However, for B3 waste management is still not good enough proven from 50 respondents only 30 respondents who stated that using the 3R method (reuse, reduce, recycle) on B3 cosmetic waste, the remaining 20 respondents answered never or just thrown away and there was only one respondent who ever sent B3 cosmetic waste to the authorities sent to the installation "Waste for Change". However, 49 respondents were willing to change their attitude by doing 3R before they disposed of B3 cosmetic waste directly. From the results of this study, it is expected that the campus will hold socialization about the dangers of B3 waste to its students because students also indirectly also produce B3 waste.
oai:ojs.ejournal.undip.ac.id:article/59732
2023-12-12T15:23:57Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/59732
2023-12-12T15:23:57Z
Waste Technology
Vol 11, No 2 (2023); 120-124
Analysis of Basic Level Students' Knowledge of Hazardous and Toxic Waste
Yhoviera Farraz Muali, Aiko; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Desti Ramadhani, Danila; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Aulianissa Ainaya, Fadia; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Muhammad, Farhan; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Rachmalia, Fayza; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Khairunnisa, Hasna; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Hawali Abdul Matin, Hashfi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
2023-12-12 15:22:11
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/59732
Knowledge; hazardous waste; toxic waste
en
Toxic hazardous material waste (Waste B3) is defined as waste that contains harmful and toxic substances, so that it can directly or indirectly damage the environment, disrupt health and threaten the survival of humans and other organisms. Students' awareness of B3 waste management can be seen through the level of knowledge they have. The level of knowledge is important in shaping a person's attitude or behavior towards the surrounding environment. The purpose of this study is to find out how much information or knowledge is owned by students of Sebelas Maret University (UNS) related to B3 waste management. The data analysis method used in this study is a descriptive analysis method in the form of a desriptive explanation of the data obtained about uns students' knowledge of B3 waste. The data collected in the form of primary data is conducted through interviews and questionnaires and secondary data. The results showed that the knowledge of Sebelas Maret Student University students related to B3 waste management is quite good, it can be seen through the results of questionnaires and interviews where there are 38 who already know and understand about B3 waste supported by the answers of 45 respondents who already understand the B3 waste itself, and there are 41 respondents who already know how they process B3 waste, namely by handing over B3 waste to the sewage treatment plant.
oai:ojs.ejournal.undip.ac.id:article/5737
2013-11-22T14:15:47Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/5737
2013-11-22T14:15:47Z
Waste Technology
Vol 1, No 1 (2013); 17-21
Challenges for municipal solid waste management practices in Vietnam
Luong, Nguyen Duc; Department of Environmental Technology and Management, National University of Civil Engineering (NUCE)
Giang, Hoang Minh; Department of Environmental Technology and Management, National University of Civil Engineering (NUCE)
Thanh, Bui Xuan; Faculty of Environment, Ho Chi Minh City University of Technology (HCMUT)
Hung, Nguyen The; Hanoi Urban Environment One Member Limited Company
2013-07-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/5737
Municipal solid waste; open dumping,; landfill; composting; incineration; recycling; Vietnam
en
Municipal solid waste (MSW) management is currently one of the major environmental problems facing by Vietnam. Improper management of MSW has caused adverse impacts on the environment, community health, and social-economic development. This study attempts to provide a review of the generation and characterization, disposal and treatment technologies of MSW to evaluate the current status and identify the problems of MSW management practices in Vietnam. Finally, this study is concluded with fruitful recommendations which may be useful in encouraging the responsible agencies to work towards the further improvement of the existing MSW management system.Doi: http://dx.doi.org/10.12777/wastech.1.1.17-21Citation: Luong, N.D., Giang, H.M., Thanh, B.X. and Hung, N.T. 2013. Challenges for municipal solid waste management practices in Vietnam. Waste Technology 1(1):6-9.Doi: http://dx.doi.org/10.12777/wastech.1.1.17-21
oai:ojs.ejournal.undip.ac.id:article/8149
2016-02-05T16:55:19Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/8149
2016-02-05T16:55:19Z
Waste Technology
Vol 3, No 1 (2015); 1-6
Quantitative Study of Biogas Generation Potential from Different Landfill Sites of Nepal
Adhikari, Bikash; Department of Environmental Science and Environmental Engineering, School of Science, Kathmandu University
Khanal, Sanjay Nath; Department of Environmental Science and Environmental Engineering, School of Science, Kathmandu University
Miyan, Raju; Department of Civil Engineering, Khwopa College of Engineering, Tribhuwan University
Thapa, Bijay; Department of Environmental Sciences and Environmental Engineering, School of Science, Kathmandu University
2015-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/8149
Biogas; Climate change; Global warming; Green house gases; Municipal solid waste.
en
This research paper was study of waste composition and quantitative analysis of biogas generation potential with its recovery at Sisdole, Pokhara and Karaute Dada landfill sites (LFS) of Nepal. The waste management practice in LFS are significant deciding factors for the assessment of environmental impacts caused including the release of green house gases like methane, carbondioxide etc to the atmosphere, that could contribute significantly to global warming and climate change. The total waste disposed to Sisdole LFS, Pokhara LFS and Karaute Dada LFS are 410, 80 and 7.8 tons respectively. The waste composition was studied onsite with waste reduction method and analyzed for their composition. The organic component of wastes was found high as 61.6%, 52.5% and 65% at Sisdole, Pokhara and Karaute Dada LFS respectively. The biogas potential at these landfill sites were 12157.78 cum, 851.99 cum and 169 cum of biogas per day in Sisdole, Pokhara and Karaute Dada LFS respectively. 4.68, 0.33 and 0.07 MW energy per day can be generated from these amounts of biogas produced in Sisdole, Pokhara and Karaute Dada LFS respectively. Proper gas collection system can be the source of income from these landfill sites and help to mitigate the adverse impact of methane that is being released from these landfill sites
oai:ojs.ejournal.undip.ac.id:article/11255
2016-06-11T21:48:53Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/11255
2016-06-11T21:48:53Z
Waste Technology
Vol 1, No 2 (2013); 10-14
Enhanced biogas separation performance of nanocomposite polyethersulfone membranes using carbon nanotubes
Kusworo, Tutuk Djoko; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Budiyono, Budiyono; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2013-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/11255
mixed matrix membrane; carbon nanotubes; biogas; gas separation
en
This study is performed primarily to investigate the effect of chemical modification on carbon nanotubes surface towards biogas purification performance of mixed matrix membrane. In this study, polyethersulfone (PES)-carbon nanotubes mixed matrix hollow fiber membrane for modified and unmodified carbon nanotubese were spun using dry/wet spinning technique. The modified carbon nanotubes were prepared by treating the carbon nanotubes with acid treatment to allow PES chains to be attached on carbon nanotubes surface. The results from the FESEM, DSC and FTIR analysis confirmed that chemical modification on carbon nanotubes surface had taken place. Meanwhile, the nanogaps in the interface of polymer and carbon nanotubes were appeared in the PES mixed matrix membrane with unmodified of carbon nanotubes. The modified carbon nanotubes mixed matrix membrane increases the mechanical properties, the productivity and purity of biogas compare to neat PES and unmodified carbon nanotubes mixed matrix membrane. For PES-modified carbon nanotubes mixed matrix membrane the maximum selectivity achieved for CO2/CH4 is 32.59.
oai:ojs.ejournal.undip.ac.id:article/19197
2019-06-28T22:50:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/19197
2019-06-28T22:50:24Z
Waste Technology
Vol 7, No 1 (2019); 27-35
Physicochemical Treatment and Disposal of Hazardous Waste
Doaemo, Willie; 1. Papua New Guinea University of Technology
2. Morobe Development Foundation
Karvounis, Panagiotis; 1.University of West Attica
2.United Nations Volunteer Action
2019-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/19197
Physicochemical properties, hazardous waste, wastewater, industrial waste, policy implementation
United Nations, Morobe Development Foundation
en
Since massive urbanization occurs, more and more waste is produced in yearly bases; a situation that drives sanitation facilities exceeding their capacities. On top of that with increased industrialization activity significantly more hazardous waste is produced and disposed as contaminated water or hazardous solid waste. This is a problem, both developed and developing states face and it can dispute the biogeochemical cycles and has side effects in human health and environment. In this report we review in detail physicochemical properties of the hazardous chemicals released to the environment and provide an overview of the various hazardous waste treatment technologies. The goal is encourage government to implement policies to ensure water pollution is controlled and enforced by law.
oai:ojs.ejournal.undip.ac.id:article/38411
2021-11-23T07:43:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/38411
2021-11-23T07:43:36Z
Waste Technology
Vol 9, No 2 (2021); 1-5
A Review on Biomedical Waste Management
Bagali, Shridhar Shrimant; Khaja Bandanawaz University Kalaburagi
Gowrishankar, Bychapur Siddaiah
Bagali, Sachin Shrimant
2021-11-23 07:43:29
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/38411
Bio-Medical Waste (BMW), Source of BMW, Effective BMW Management
en
With the growth of healthcare facilities, the amount of biomedical waste produced every day is growing. If biomedical waste management is done correctly, many of the problems can be avoided. Segregation, storage, processing, transportation, and disposal of biomedical waste are all common practices undertaken as part of health care waste management. It involves interdisciplinary relationships in organizational, planning, administrative, financial, engineering, legal, and human resource creation. Medical waste management necessitates dedication from healthcare providers at all levels. The risks and value of their "contribution" are feared in a system run by reckless and untrained personnel. Also trained medical professionals, such as hospital managers, private and governmental institutes, clinics, and universities, need to be taught about the rules for disposing of biomedical waste. The importance of biomedical waste, its interaction with the ecosystem, the environmental pollutants used in the health care industry, and the effect of callousness on public health are all topics that are still largely unknown. To achieve better results, we must raise the level of training and education in biomedical waste and environmentally sustainable health care as quickly as possible, while adhering to all applicable rules and regulations.
oai:ojs.ejournal.undip.ac.id:article/48745
2023-06-06T16:16:54Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/48745
2023-06-06T16:16:54Z
Waste Technology
Vol 11, No 1 (2023); 1-16
Electrocoagulation: An Overview of the Technology for Livestock Farm Wastewater Treatment
Mustari Khanaum, Mosammat; Department of Civil, Construction and Environmental Engineering, North Dakota State University, Fargo, ND
Saidul Borhan, Md.; Maintenance Division, Texas Department of Transportation, Austin, TX
2023-05-12 05:53:44
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/48745
BOD; COD; electrocoagulation; electrode; TSS; livestock; wastewater
N/A
en
Livestock operations generate wastewater which is characterized by high biological oxygen demand and chemical oxygen demand concentrations, high levels of solids including fats, oils, and grease. Its high nutrient content, particularly phosphorus and nitrogen, is an important factor because of its environmental impact. To reduce these, nutrient contaminants can either be captured or removed from liquid manure before disposal. Several techniques, including chemical, electrochemical, biological, and advanced oxidation, are used to treat this wastewater. Most of them have some limitations. Conventional and biological processes are time-consuming and cost-intensive, requiring a large treatment area, and generating large amounts of sludge. Lately, electrolysis has attracted attention as a potential strategy for wastewater treatment due to its environmental compatibility. Livestock waste chemistry differs considerably from industrial wastewater. Hence, the selection of electrode material with anode and cathode combination mode is critical to removing pollutants at low energy consumption. A total of 72 published articles were reviewed in this paper focusing on system configuration, contaminant removal, operation timing, and achievement of this electrocoagulation process. The commonly used electrode materials are aluminium, iron, and mild steel. In treating livestock wastewater, different combinations (Al-Al, Al-Fe, and Fe-Fe) and wiring modes of anode and cathode have been reported in the literature.
oai:ojs.ejournal.undip.ac.id:article/54226
2023-06-06T16:16:55Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/54226
2023-06-06T16:16:55Z
Waste Technology
Vol 11, No 1 (2023); 68-74
Analysis of Community Perception on Medical Mask Waste Classified as Hazardous and Toxic Waste in Surakarta, Indonesia
Noviana Hartanti, Andini; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Estelita Damayanti, Clara; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Pradana Adzil Fadzilah, Fariz; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Azma Tsabita, Fatiya; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Erlis Safitri, Fauziana; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Enos Berlin, Gavriel; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Hawali Abdul Matin, Hashfi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
2023-05-12 05:53:57
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/54226
en
Hazardous and toxic waste is a substance, energy, or other component that can pollute the environment and endanger the health of living things. One example of this waste is medical waste. Medical waste is classified as hazardous and toxic waste because medical waste is infectious which has the potential to pose a risk of disease transmission. The Covid-19 pandemic has led to an increase in medical waste such as disposable masks. This mask waste requires special management so that it does not become a medium for spreading the virus. This study aims to find out how the public's understanding of mask waste is classified as infectious hazardous and toxic waste, and how the community's knowledge is in managing mask waste. The method of data collection was done through a questionnaire using a Likert approach. The data obtained were analyzed using quantitative and descriptive analysis methods. The results showed that the understanding and awareness of self-management of medical mask waste in the city of Surakarta was high, but the presentation of willingness to collect and send it was quite low. More initiatives and roles from the government and the community are needed in the management of medical mask waste.
oai:ojs.ejournal.undip.ac.id:article/7240
2015-02-17T13:19:27Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/7240
2015-02-17T13:19:27Z
Waste Technology
Vol 2, No 2 (2014); 31-40
Life Cycle Assessment on Cement Treated Recycling Base (CTRB) Construction
Sudarno, Sudarno; Departement of Environmental Science, Universitas Diponegoro Semarang
Purwanto, Purwanto; Department of Environmental Science, Universitas Diponegoro Semarang
Pratikso, Pratikso; Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Sultan Agung Semarang
2014-10-04 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/7240
en
LCA is one of the few environmental management techniques that are used to perform a risk assessment, environmental performance evaluation, environmental auditing, and environmental impact assessment and must be applied to the construction CTRB. The purpose of this study was to determine the amount of energy consumption is used and determine the amount of emissions (CO2) in the implementation of the Foundation Layer Top (base course) with the former asphalt pavement aggregate blended cement / Recycling Cement Treated Base (CTRB). This study uses: (i) Compilation and data inventory of relevant inputs and outputs of a product system; (ii) Evaluating the potential environmental impacts associated with the data input and output; (iii) Interpret the results of the inventory analysis and impact assessment in relation to the research objectives. The results showed that Energy consumption in the implementation of recycling pavement (CTRB) is 225.46 MJ / km of roads and the resulting GHG emissions 17,43Ton CO2 / km of roads. Previous researchers to calculate the energy consumption of road works on the implementation of conventional (hotmix) is 383.46 MJ / km of roads and the resulting GHG emissions 28.24 Ton CO2 / km of roads. If the calculated difference between a job and Hotmix CTRB and then a comparison is made CTRB energy consumption is 158 MJ / km of road, this happens 70.07% savings and GHG emissions resulting difference is 10.81 tons of CO2 / km of road, resulting in a decrease in 62,02%.
oai:ojs.ejournal.undip.ac.id:article/9214
2016-07-27T21:52:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/9214
2016-07-27T21:52:36Z
Waste Technology
Vol 4, No 1 (2016); 13-15
WASTE MANAGEMENT STRATEGIC PLANNING (WASTE MANAGEMENT IN JAYAPURA CITY)
https://ejournal.undip.ac.id/index.php/wastech/article/download/9214/20656
Ramandey, Lazarus B.; Perencanaan wilayah kota Cenderawasih University Jayapura Papua
2016-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/9214
en
Abstract: This study deals with urban waste management in general by considering key issues in waste management in Indonesia and various problem solving alternatives dealing with waste problem referring to waste management in developed countries (Curitiba). In addition, problems faced will be discussed with the systems approach including: institutional sub-system (sub-system of institutions), operational technique sub-system (sub-systems engineering), financial sub-system, legal and regulatory sub-system (law sub-system) as well as public and private role sub-system. Population growth that is accompanied by high urbanization has resulted in increasingly high volume of waste that must be managed every day. It is increasingly difficult for management and waste management are less than optimal. Similarly, the active role and public awareness as well as the financing are still very low. The system approach can assist in solving the complexity of the problem of waste management by looking at the issues comprehensively. Keywords: urban waste management, population growth, public awareness
oai:ojs.ejournal.undip.ac.id:article/16243
2018-01-11T21:00:12Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/16243
2018-01-11T21:00:12Z
Waste Technology
Vol 5, No 2 (2017)
Extraction of Natural Dyes from Palm’s Empty Fruit Bunches and Their Application on Cotton Fabric
Wibowo, Wusana Agung; Program Studi Sarjana Teknik Kimia
Fakultas Teknik
Universitas Sebelas Maret
2017-12-14 08:09:32
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/16243
water-based extraction; absorbance; Alum; color-fastnest; CIELab
PUT-MRG grant provided by Universitas Sebelas Maret
en
Natural dyes was extracted from palm’s empty fruit bunches (PEFB) by water extraction and applied for cotton fabric dyeing. The extracted dyes was characterized by liquid mass spectrometry and dyed cotton fabric was characterized by color fastnest to laundering and rubbing tests. Experimental results showed that soxhlet extraction process of PEFB for 80 minutes yielded 13.8%bw of solid dyes to naturally-dried PEFB with 4.15%bw of tannins. Furthermore, production of natural dyes was carried out in a 500 ml flask by extracting 25 g of PEFB in 250 ml of water at 100oC for 120 minutes. Absorbance of extracted dyes was found to be 3.925 at λmax. Cotton fabric dyeing was conducted at room temperature for all steps and post-mordanted by using Alum. The colors of the dyed cotton fabrics were then measured and expressed according to CIELab color system. Furthermore, the color fastnest test results obtained by Stainning Scale and Grey Scale were found to be 4-5 by color differences of 2. These results showed that dyed cotton fabric give a good rank on color fastnest.
oai:ojs.ejournal.undip.ac.id:article/33435
2020-12-12T11:22:53Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/33435
2020-12-12T11:22:53Z
Waste Technology
Vol 8, No 2 (2020); 34-38
FEASIBILITY OF BIOETHANOL PRODUCTION FROM ROTTEN TOMATOES (Solanum Lycopersicum) USING SACCHAROMYCES CEREVISIAE
https://ejournal.undip.ac.id/index.php/wastech/article/download/33435/99078
Osei, Janet Appiah; KENYATTA UNIVERSITY
2020-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/33435
en
The study aimed at optimizing different fermentation conditions for bioethanol production using rotten tomatoes (Solanum lycopersicum). Rotten tomatoes were collected from sellers at Nairobi market, Kenya for six months and analysed after each time of collection in Kenyatta University Laboratory. They were physically pre-treated and enzymatic hydrolysis was performed using commercial cellulase from Aspergillus niger. Fermentation was carried out using pure culture of Saccharomyces cerevisiae (baker’s yeast). Fermentation variables were optimised at different incubation times of (24, 48, 72, 96, 120 and 144 hours) and temperatures (20oC, 25oC and 30oC). Concentration (%/v/v) of bioethanol at the end of each fermentation time was determined by the use of colorimetric method and residual sugar was determined using DNS method by Miller. Maximum bioethanol percentages of (0.17%) and (0.16%) were achieved at 24 hours and 30oC respectively. Thus, the optimum conditions for maximum bioethanol production in the study were fermentation time of 24 hours and temperature 30oC. The study results have proved the effectiveness of producing bioethanol from rotten tomatoes using baker’s yeast for fermentation.
oai:ojs.ejournal.undip.ac.id:article/41847
2022-04-14T08:38:10Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/41847
2022-04-14T08:38:10Z
Waste Technology
Vol 10, No 1 (2022); 7-16
IMPACT OF EFFLUENT DISCHARGE AND SEASONAL VARIATIONS ON THE QUALITY OF EKEMAZU STREAM IN DELTA STATE, NIGERIA.
EMMANUEL-AKERELE, HILDA ABIOLA; Department of Biological Sciences, Anchor University Lagos
2022-04-14 08:38:07
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/41847
Antibiotics, effluent, microbiological, stream, pollution
one
en
The impact of effluent discharge and seasonal variations on the quality of Ekemazu was determined. Total heterotrophic bacterial counts and most probable number was determined using standard microbiological procedures. The total heterotrophic bacteria counts in the upstream samples analyzed across the seasons varied between 4.8 ± 0.4 x 102 cfu/ml and 8.7 ± 0.1 x 102 cfu/ml, 36.0 ± 1.0 x 102 cfu/ml and 98.0 ± 1.0 x 102 cfu/ml in the effluent discharge point, 53.0 ± 6.0 x 102 cfu/ml and 85.0 ± 3.0 x 102 cfu/ml in the domestic activities point and 46.0 ± 4.0 x 102 cfu/ml and 78.0 ± 2.0 x 102 cfu/ml in the downstream. The total coliform counts ranged between 11.3 ± 0.9 MPN/100 ml and 19.0 ± 1.0 MPN/100 ml in the upstream, 20.0 ± 0 MPN/100 ml and 37.5 ± 2.5 MPN/100 ml in the effluent discharge point, 18.0 ± 0 MPN/100 ml and 35.0 ± 0 MPN/100 ml in the domestic activities point and 17.0 ± 0 MPN/100 ml and 22.5 ± 2.5 MPN/100 ml in the downstream. The faecal coliform counts in the upstream ranged between 6.0 ± 0 MPN/100 ml and 8.0 ± 1.0 MPN/100 ml, 9.0 ± 1.0 MPN/100 ml and 13.0 ± 1.0 MPN/100 ml in the effluent discharge point, 9.0 ± 0 MPN/100 ml and 11.5 ± 0.5 MPN/100 ml in the domestic activities point, 8.0 ± 0 MPN/100 ml and 10.0 ± 0.8 MPN/100 ml in the downstream. Organisms identified were Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis, Proteus mirabilis, Aeromonas hydrophilia, Klebsiella pneumoniae and Enterococcus faecalis. Antimicrobial susceptibility test of isolates showed that the organisms were 14% sensitive to Meropenem, Levofloxacin, Amoxicillin, Tetracycline, Ciprofloxacin, Erythromycin and Gentamicin, 29% sensitive to Septrin and Chloramphenicol 43% sensitive to Amikacin, Ampicillin, and Gentamicin, This research clearly showed that bacterial load of the stream is higher than the WHO acceptable limit and the isolates are multidrug resistant.
oai:ojs.ejournal.undip.ac.id:article/51203
2023-06-06T16:16:54Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/51203
2023-06-06T16:16:54Z
Waste Technology
Vol 11, No 1 (2023); 17-27
Performance and antifouling evaluation of PSf/GO nanohybrid membrane on removing dye pollutant from batik wastewater
https://ejournal.undip.ac.id/index.php/wastech/article/download/51203/163261
https://ejournal.undip.ac.id/index.php/wastech/article/download/51203/163267
Kusworo, Tutuk Djoko; Department of Chemical Engineering, Diponegoro University
Azizah, Dita Aulia; Chemical Engineering Dipoengoro University, Semarang, Indonesia
Kumoro, Andri Cahyo; Chemical Engineering Dipoengoro University, Semarang, Indonesia
2023-05-12 05:53:46
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/51203
Batik; Dye wastewater; Fouling; Graphene oxide; Nanohybrid membrane
en
Membrane technology is the most widely used technology in the field of separation and purification of wastewater. Most of the problems that arise in the application of membrane technology are the high resistance of the membrane during the filtration process, so that fouling is easily formed in both the pores and the membrane surface. The incorporation of nanoparticles in the membrane matrix has been widely known as a method to improve membrane performance. In this study, we introduce the incorporation of graphene oxide (GO) advanced material nanoparticles in a polysulfone (PSf) membrane matrix as an effort to treat dye wastewater from the batik industry. The results of the SEM-EDX test showed the membrane smooth surface with larger pore and minimal defects indicating GO nanoparticles were well changed the polysulfone membrane matrix. In addition, an increase in oxygen content in the membrane matrix was also detected as a result of GO incorporation confirming the increased hydrophilicity of the polysulfone membrane. This is also supported by data on increasing water uptake and decreasing contact angle of PSf/GO membranes compared to native PSf. Evaluation of membrane performance showed that the incorporation of GO in the PSf matrix produced permeate with higher quantity and quality than the native PSf membrane. Quantitative analysis of fouling behavior also shows that the incorporation of GO as much as 2 wt-% has succeeded in increasing flux recovery ratio and reducing the PSf membrane resistance which reflects the tendency to form fouling is also getting lower. This membrane material has good prospects in the future as the first step in processing dye wastewater from various industries, especially the batik industry.
oai:ojs.ejournal.undip.ac.id:article/6796
2014-07-04T11:12:12Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/6796
2014-07-04T11:12:12Z
Waste Technology
Vol 2, No 1 (2014); 1-7
Fly Ash Slurry Transportation: Indian Scenario
Ahmad, Md Aquil; Department of Mechanical Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia (Central University), New Delhi
Ali, Zeeshan; Department of Mechanical Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia (Central University), New Delhi
Haque, Md Emamul; Department of Mechanical Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia (Central University), New Delhi
2014-03-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/6796
fly ash; slurry; Indian scenario
en
Fly ash produced in pulverized form are menace to transport due to its powder form. Converting it to slurry form as the physical state change makes it technically viable to move from one place to other convenience to transport. In this paper we envisage the contemporary scenario of transportation of flyash including special focus on trouble related to flyash transportation whether to use in backfilling of mines or open area disposal the transport of these fine particle ash is an issue. Further suggestions and improvement for working of fly ash
oai:ojs.ejournal.undip.ac.id:article/9966
2016-05-28T21:47:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/9966
2016-05-28T21:47:24Z
Waste Technology
Vol 3, No 2 (2015); 41-46
Use of G3-DHS Bioreactor for Secondary Treatment of Septic Tank Desludging Wastewater
Machdar, Izarul; Department of Chemical Engineering, Faculty of Engineering, Syiah Kuala University
Faisal, Faisal; Department of Chemical Engineering, Faculty of Engineering, Syiah Kuala University
Muhammad, Syaifullah; Department of Chemical Engineering, Faculty of Engineering, Syiah Kuala University
Onodera, Takashi; Regional Environment Systems Section, Center for Regional Environmental Research,
National Institute for Environmental Studies (NIES)
Syutsubo, Kazuaki; Regional Environment Systems Section, Center for Regional Environmental Research,
National Institute for Environmental Studies (NIES)
2015-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/9966
domestic wastewater; G3-DHS; septic tank; desludging
en
Study was done for the use of the third-generation of downflow hanging sponge (G3-DHS) bioreactor for secondary treatment of septic tank desludging wastewater. The main objective of this study was to evaluate the prospective system of G3-DHS bioreactor to be applied in Indonesia. During experiment, the G3-DHS bioreactor kept a relatively high dissolved oxygen concentration under natural aeration. At a relatively short hydraulic retention (HRT) of 3 h, the G3-DHS bioreactor could remove up to 21% (SD 15%) of total COD, 21% (SD = 7%) of filtered-COD, 58% (SD = 24%) of unfiltered-BOD, and 33% (SD = 24%) of ammonium removal. The final effluent had an unfiltered-BOD of only 46 mg.L-1 (SD = 20 mg.L-1) that it was below the Indonesian standard (unfiltered-BOD = 100 mg.L-1) for thresholds of domestic wastewater treatment plants effluent.
oai:ojs.ejournal.undip.ac.id:article/11644
2018-01-11T21:10:08Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/11644
2018-01-11T21:10:08Z
Waste Technology
Vol 5, No 1 (2017); 1-8
Applying waste treatment scenarios in Toluca region (Mexico).
Tsydenova, Nina; Carl von Ossietzky University of Oldenburg
2017-07-13 21:57:37
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/11644
Assessment methods, waste management, anaerobic digestion, waste-to-energy, mechanical-biological treatment, sanitary landfill, climate change
en
Governments in emerging countries need to analyse waste treatment alternatives, other than landfills, in order to decrease environmental pollution and socio-economic impacts. This study is assessing several alternative scenarios of waste treatment in Toluca municipality (Mexico) such as sanitary landfill, combustion of landfill gas, waste incineration (WtE), mechanical-biological treatment (MBT) and combination of anaerobic digestion (AD) and sanitary landfill under the condition of source waste separation. The objective of the research is the identification of the most feasible waste treatment scenario for developing countries which have the high percentage of organics on waste stream. The assessment is implemented from several perspectives: greenhouse gas (GHG) emissions, economic feasibility and consideration of informal recycling sector. The emissions generated at the baseline scenario are high due to the great percentage of organics in the municipal solid waste (MSW). The WTE and MBT facilities generate the lowest emissions but have a high gate fee. The scenario involving AD and sanitary landfill has the lowest gate fee while its emissions are significantly reduced compared to the baseline. The author believes that widespread adoption of AD systems, together with the source separation scheme, can be the starting point in the implementation of sustainable waste management in transition countries, such as Mexico.
oai:ojs.ejournal.undip.ac.id:article/30464
2020-06-17T23:02:56Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/30464
2020-06-17T23:02:56Z
Waste Technology
Vol 8, No 1 (2020); 18-21
Strategies for Paint Waste Minimization in the Packaging Industry
Dina Permana Citra, Ari; Study Program of Refraction Optics, Widya Husada University, Semarang, Indonesia
Purwanto, Purwanto; Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Semarang Indonesia
2020-04-30 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/30464
paint waste, cosmetic packaging, waste to product, zero waste
en
Cosmetic packaging painting using an alkyd resin compound is to make a smooth, glossy surface and attract the attention of consumers. The generated waste is handed over to a third party and has not been utilized as a product, so it requires a high enough cost. This research aims to develop a waste management strategy from its source to its utilization into a product. The research method uses a block diagram of the production process to identify waste generation and opportunities for prevention and reduction. Waste arising from alternative uses is created into a product leading to zero waste. This approach provides economic and environmental benefits for the cosmetics packaging industry.
oai:ojs.ejournal.undip.ac.id:article/40392
2021-11-23T07:43:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/40392
2021-11-23T07:43:36Z
Waste Technology
Vol 9, No 2 (2021); 6-13
Effect of cement kiln dust, lime and fly ash on metal leaching characteristics of oil sands tailings from Alberta, Canada
Saeedi, Mohsen; GES Geotech Inc. (Global Earth Solutions), North Vancouver Canada
Mahmoud, Mahmoud; GES Geotech Inc. (Global Earth Solutions), North Vancouver Canada
2021-11-23 07:43:31
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/40392
Oil sands industry; thickened tailings; mature fine tailings; geopolymers; CKD; heavy metals; leaching tests
en
The oil sands industry of Alberta generates huge amounts of tailings in a slurry form that typically require up to 40 years to consolidate in very large tailings ponds which are up to 150 m in height. Cement kiln dust (CKD), a byproduct of the ordinary Portland cement manufacturing process, as well as lime and fly ash, collectively referred to as geopolymers, may have the potential to reduce the tailings slurry consolidation period from 40 years, thus affecting the sustainability of such tailings facilities. However, first, it must be demonstrated that these geopolymers will also decrease the metal leaching from thickened tailings (TT) and mature fine tailings (MFT) from the oil sands industry. This study was focused on the use of geopolymers to reduce the environmental impact of TT- and MFT-tailings in the Alberta oil sands industry. Toxicity characteristics leaching procedure (TCLP) and static leaching test (SLT) was used to examine the leaching of metals from tailings, with the SLT test effectively mimicking the leaching process in the tailings ponds environment. Under non-acidic conditions corresponding to the SLT test results, iron concentrations with values of about 530-705 ppm were found to be lower than previous studies on oil sand tailing ponds (2400 ppm). Results showed that geopolymer amendment of TT and MFT significantly reduced the leaching of heavy metals. SLT tests showed that amendment of MFT with 7% CKD decreased Pb, Mn, and Fe leaching, whereas TT-amended with 4% CKD decreased Cu, Pb, Zn, Mn, and Fe. Overall, the CKD amendment of TT showed more than 95% efficiency in the reduction of leaching of all heavy metals. In TCLP tests, TT-amended with 2% FA decreased the leaching of Pb and Ni to acceptable levels with substantial efficiency in reducing the leaching of Fe, Cu, and Zn. TCLP tests also showed that among different amendments, TT-amended with 4% CKD or 2% FA were the most effective proportions for controlling metal leaching from TT, while MFT-amended with 7% lime/FA or 3% CKD were the effective proportions for reducing metal leaching from MFT. Thus, it is deduced that CKD at 3%-4% w/w amendment would work best for reducing leachate levels of both TT and MFT. While amendment of tailings by means of a combination of fly ash and lime also were effective in reducing the leaching of metals, these two geopolymers were not as effective as the CKD amendment.
oai:ojs.ejournal.undip.ac.id:article/50464
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/50464
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 35-49
Treatment of Natural Rubber Wastewater using Photoactive Nanocomposite Membrane PSf/sulfonated ZnO: Performance Evaluation, HAZOP, and Risk Analysis
https://ejournal.undip.ac.id/index.php/wastech/article/download/50464/160349
Kusworo, Tutuk Djoko; Department of Chemical Engineering, Diponegoro University
Widayat, Widayat; Department of Chemical Engineering, Diponegoro University
Hadiyanto, Hadiyanto; Department of Chemical Engineering, Diponegoro University
2022-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/50464
Adsorption, Membrane, Natural rubber, Sulfonation, Wastewater, Zinc oxide
en
The application of nanocomposite membranes for high organic wastewater treatment faces several problems such as impurities and low permeate flux. In this study, sulfonated ZnO nanoparticles were incorporated in the PSf membrane. SEM images reveal that sZnO has good compatibility with PSf polymers and the FTIR spectrum also forms sulfonic acid groups on the composite membrane. The addition of sZnO into PSf increased the PWF value but overloading caused a significant decrease. The surface hydrophilicity of the membrane was also enhanced by the incorporation of sZnO into the PSf membrane. The performance evaluation showed a significant increase in flux from 9.0 to 14.5 L.m-2.h-1 and a disappointment rate for ammonium ion (NH4+) up to 87%. Increased hydrophilicity was also revealed by decreasing the air contact angle from 79.33° to 55.67°. PVA-coated membranes can increase COD rejection up to ~88%, which is 8 times higher than uncoated composite membranes. The PVA coating also reduced the tendency of organic fouling on the membrane during rubber wastewater filtration by reducing the total fouling resistance from 14.2 x 10-11 to 9.91 x 10-11 m-1. The HAZOP and risk analysis were also studied in this work regarding on their practical application in industrial scale..
oai:ojs.ejournal.undip.ac.id:article/59909
2023-12-12T15:23:57Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/59909
2023-12-12T15:23:57Z
Waste Technology
Vol 11, No 2 (2023); 112-119
Sustainable Batik Wastewater Treatment using Advanced PVDF/NiFe@SiO2 Nanocomposite Photocatalytic Membrane
https://ejournal.undip.ac.id/index.php/wastech/article/download/59909/192942
Kusworo, Tutuk Djoko; Department of Chemical Engineering, Diponegoro University
2023-12-12 15:23:01
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/59909
Batik wastewater, Fouling, Membrane, Nickel ferrite, Photocatalytic
en
The primary concern associated with the Batik industry lies in the presence of pollutant dyes that contribute to environmental contamination. Addressing this issue involves exploring various wastewater treatment methods, with membrane technology being a viable approach. In this study, a photocatalytic material, NiFe@SiO2, synthesized through the sol-gel technique, was incorporated into a PVDF membrane. Characterization results from SEM surface, indicated that the PVDF/NiFe@SiO2 membrane displayed superior characteristics compared to other membranes. The addition of the NiFe@SiO2 photocatalyst increased membrane porosity, hydrophilicity, water absorption capacity, and affinity towards water molecules. The PVDF/NiFe@SiO2 membrane exhibited enhanced performance in terms of permeate flux, pollutant rejection, stability, recyclability, and durability. Notably, the fabricated photocatalytic membrane demonstrated superior antifouling performance and flux recovery capability when operating under UV radiation. The study also delved into the influence of wastewater pretreatment on antifouling membrane performance. The modified membrane successfully reduced fouling levels on the membrane by enhancing FRR from ~70% to ~90%. This insight into how pretreatment affects the antifouling properties of wastewater opens avenues for innovative solutions and enhanced design strategies to improve the efficiency and sustainability of wastewater treatment processes. Future research endeavors could focus on maximizing the potential of the bentonite adsorbent in wastewater pretreatment and exploring the full capabilities of the NiFe@SiO2 photocatalyst in enhancing the photocatalytic and antifouling performance of the membrane.
oai:ojs.ejournal.undip.ac.id:article/5738
2013-11-22T14:15:47Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/5738
2013-11-22T14:15:47Z
Waste Technology
Vol 1, No 1 (2013); 22-25
Observation of temperature and pH during biogas production from water hyacinth and cow manure
Astuti, Nurfitri; Environmental Science Master Program, Diponegoro University
Soeprobowati, Tri Retnaningsih; Department of Biological Science Master Program, Diponegoro University
Budiyono, B; Department of Chemical Engineering Diponegoro University
2013-07-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/5738
Water hyacinth, biogas, pH, temperature, Rawapening
en
Biogas is generated from biological process of organic material by bacterial engaged. Biogas can be derived from manure, municipal waste, agricultural waste and other biomass resources. In addition to the use of cow manure as raw material for biogas production, it can also be derived from biomass containing cellulose which one is water hyacinth as an organic material that contains quite large cellulose. The abundance of water hyacinth found in Rawapening causing several negative impacts. The purpose of this study is to observe temperature and pH on the biogas production generated from water hyacinth of Rawapening and cow manure. Biogas production process begins by chopping the leaves and stems of water hyacinth, and then mixed with cow manure and water. The results of substrate variation of water hyacinth, cow manure and water reaches optimally at 40:80:480 respectively, which produce the highest point of biogas amounted 176.33 ml on the day 20 in 1L sized digester, the temperature of the biogas production is at 32°C. At the initial fermentation, digester temperature of 30°C has increased over the course of the fermentation process, a peak at day 20 and then decreased to 27°C at the end of fermentation. There is a decrease in pH starting from initial fermentation at pH 6-7 and then the pH began to decline until the end of fermentation as amount of pH 5.Doi: http://dx.doi.org/10.12777/wastech.1.1.22-25Citation: Nurfitri Astuti, N., Tri Retnaningsih Soeprobowati, T.R., and Budiyono. 2013. Observation of temperature and pH during biogas production from water hyacinth and cow manure. Waste Technology 1(1):1-5. Doi: http://dx.doi.org/10.12777/wastech.1.1.22-25
oai:ojs.ejournal.undip.ac.id:article/8228
2015-02-17T13:19:27Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/8228
2015-02-17T13:19:27Z
Waste Technology
Vol 2, No 2 (2014); 63-66
Studies of thermal annealing and dope composition on the enhancement of separation performance cellulose acetate membrane for brackish water treatment from Jepara
Kusworo, Tutuk Djoko; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Budiyono, Budiyono; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Rochyani, U. N. A.; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Sofiana, E.; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2014-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/8228
Asymmetric membrane; PEG; Cellulose Acetate; Annealing; Brackish Water
en
Membrane is an alternative technology of water treatment with filtration principle that is being widely developed and used for water treatment. The main objective of this study was to make an asymmetric membrane using cellulose acetate polymer and study the effect of additive and annealing treatment on the morphology structure and performance of cellulose acetate membranes in brackish water treatment. Asymmetric membranes for brackish water treatment were casted using a casting machine process from dope solutions containing cellulose acetates and acetone as a solvent. Membranes was prepared by phase inversion method with variation of polyethylene glycol (PEG) concentration of 1 and 5 wt% and with thermal annealing at 60 oC in 10 seconds and without thermal annealing behavior. Membrane characterization consists of calculation of membrane flux and rejection with brackish water as a feed from Jepara. The research concluded that asymmetric cellulose acetate membrane can be made by dry/wet phase inversion method. The more added concentration of PEG will be resulted the larger pore of membrane. Meanwhile the higher temperature and the longer time of annealing treatment, the skin layer of membrane become denser. Membrane with the composition of 18 wt% cellulose acetate, 5 wt% PEG, 1 wt% distilled water, with heat treatment at temperature of 60 oC for 10 seconds is obtained optimal performance.
oai:ojs.ejournal.undip.ac.id:article/11351
2016-07-27T21:52:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/11351
2016-07-27T21:52:36Z
Waste Technology
Vol 4, No 1 (2016); 36-39
CHARACTERISATION OF BIODIESEL PRODUCED USING DOMESTIC WASTE ASH AS CATALYST IN THE TRANSESTERIFICATION STAGE
Uche, Kelechi; Department of Biochemistry, Federal University of Technology Owerri, Nigeria.
Nwachukwu, Ngwu; Department of Biochemistry, Federal University of Technology Owerri, Nigeria.
Alisi, Chinwe; Department of Biochemistry, Federal University of Technology Owerri, Nigeria.
Ibegbulem, C
2016-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/11351
Domestic Wastes, Biodiesel, Transesterification, Alkali
en
Domestic wastes ash of unripe plantain peels, palm fruit husks and kola nut pods were used in place of inorganic potassium and sodium in biodiesel production. Analysis of fuel parameters such as Density, Viscosity, Cloud, Pour and Flash points were carried out on the produced biodiesel using the American Standard for Testing Materials ASTM D6751. Quantitative analysis with Atomic Absorption Spectroscopy was done to determine the presence of metals on the 3 ash samples. The result of fuel parameters of Density (mm2/s), Viscosity (mm2/s), Cloud (˚C), Pour (˚C) and Flash (˚C) points gave 0.890±0.007, 5.046±0, 9.0±0.28, 6.5±0.35, 168±1.41 respectively for unripe plantain sample; 0.890±0.01, 5.196±0.00, 9.0±0.56, 6.0±0.14, 168±8.48 for palm fruit husk; 0.895±0.01, 5.912±0.00, 10.25±0.14, 8.0±0.70, 172±2.82 for kola nut pods and 0.886±0.00, 4.813±0.01, 6±0.28, 3±0.00, 165±2.12 for the control sample. Quantitative analysis of the ash samples for metals showed the presence of these metals in the following order K > Na > Pb, Na > K >Pb, K > Na >Pb respectively. The samples studied were found to be rich sources of alkali which can be utilized as alternative to conventional alkali in industries.
oai:ojs.ejournal.undip.ac.id:article/23509
2019-06-28T22:50:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/23509
2019-06-28T22:50:24Z
Waste Technology
Vol 7, No 1 (2019); 36-44
Hospital Waste Management in Kidney Transplantation Procedure: Implications and Solutions
Nugroho, Eriawan Agung; Division of Urology, Medical Faculty Diponegoro University/Dr. KariadiGeneral Hospital, Semarang
Nugroho, Leonardo Cahyo; Resident of General Surgery Department, Medical Faculty Diponegoro University/Dr. Kariadi General Hospital, Semarang
2019-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/23509
en
The number of patients diagnosed with end-stage renal disease (ESRD) in Indonesia is increasing annualy, showing a similar trend with the global prevalence. Withits superior outcome, kidney transplantation remains to be the traetment of choice for ESRD. The treatment with transplant kidney procedure makes extensive use of presterilized disposable items which, after use, are contaminated by blood. The preferred route of disposal of such items is by incineration. Disposal costs have risen and this increase in costs has not been matched by waste management programs in kidney transplantation procedure. Many of the waste items like container for blood products and intravenous infusion fluid contain erwhichiswidely used in kidney transplantation procedure generated alsoconta in polyvinylchloride (PVC) whose incineration is environmentally sensitive. Furthermore blood tubing sets contain plasticizers such as di(2-ethylhexyl) phthalate (DEHP), which is known to pose health risks to specific groups of patients. The generation of hospital waste in a kidney transplantation procedure is analyzed, issues associated with disposal are discussed, and approaches toward a cost effective environmentally sustainable hospital waste management program are reviewed.
oai:ojs.ejournal.undip.ac.id:article/47489
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/47489
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 1-9
The Influence of Community Behavior on Water Quality of The Anyar River in Surakarta City Based on Physical-Chemical Parameters
https://ejournal.undip.ac.id/index.php/wastech/article/download/47489/154065
Yulia, Inggrid Trifena; Sebelas Maret University
Negara, Ilhamnul Zain Satria; Sebelas Maret University
Negari, Snada Indah Tuk; Sebelas Maret University
Sholiqin, Muchammad; Sebelas Maret University
Rachmawati, Siti; Sebelas Maret University
2022-09-20 13:52:24
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/47489
Anyar River, Parameters, Water Pollution, Society
Inggrid Trifena Yulia, Sebelas Maret University
en
The Anyar River is a tributary of the Bengawan Solo River, which is located in the city of Surakarta. The Anyar River has a watershed area of approximately 305.2 km2 and the length of the main river from the Anyar River is approximately 61.96 km. This river is important for people's lives, but the awareness of the surrounding community is still lacking, as evidenced by several community houses that there is still feces disposal from the septic tank, which is channeled directly to the Anyar River through pipes. The surrounding community did not hold any cleaning activities for the Anyar River, only a rule from the local RT not to throw garbage in the Anyar River. When the dry season arrives, the water in the Anyar River will recede and will occasionally be polluted when it is dry. These things will certainly affect the quality of the water in the Anyar River. This study aims to determine the effect of community behavior on the water quality of the Anyar River, Surakarta City, based on water physico-chemical parameters. The research method used is a descriptive qualitative method, obtained through observation and interviews as well as several journal articles related to physical and chemical parameters in water. The results of this study indicate that at the three main location points in the Anyar River, no water pollution was found based on the results of measurements of physical-chemical parameters such as pH, temperature, DO, TDS, and turbidity. However, at location point II, the branch was found to be more polluted because it was used by local residents for direct disposal. From the results of the study, it can be concluded that the awareness of citizens to maintain water quality in the Anyar River is still a bit lacking, so some recommendations are given by inviting residents to work together to clean the river; make IPAL and household water disposal (septic tank) independently; emphasize not to throw garbage in the river; and residents can take advantage of PAHs during the rainy season.
oai:ojs.ejournal.undip.ac.id:article/57248
2023-12-12T15:23:57Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/57248
2023-12-12T15:23:57Z
Waste Technology
Vol 11, No 2 (2023); 75-90
Integrated Solid Waste Management for Closed Community: An Experiment on Jahangirnagar University Campus
https://ejournal.undip.ac.id/index.php/wastech/article/download/57248/183391
Hossain, Md. Jakir; Jahangirnagar University
Mahmud, Md. Munir; Jahangirnagar University
Moinuddin, Golam
2023-11-20 02:24:05
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/57248
ISWM, Closed Community, Community Participation, Jahangirnagar University
No
en
This study examines community participation in integrated solid waste management (ISWM) at Jahangirnagar University in Bangladesh. The university faces significant challenges in waste management, with negative social, environmental and economic consequences. The goal is to identify barriers to community involvement in ISWM and provide recommendations for enhancing engagement. The research uses a mixed-methods approach, surveying 397 respondents using cluster random sampling from the university's population of 20,000. Data collection methods include interviews, observations, focus groups, and document analysis. The findings highlight obstacles to community participation, such as limited community empowerment, mobilization, organization, and resource coordination. Household waste segregation is practiced by only 30% of respondents. However, 74% of participants express willingness to oversee door-to-door waste collection and dispose of waste at designated points, influenced by socioeconomic factors. Non-compliance with ISWM regulations is observed in 26% of respondents, and 12% lack sufficient knowledge about ISWM, indicating a need for improved organization and coordination. Additionally, some university authorities rely on outdated methods, resulting in weak enforcement of environmental regulations. Ineffective policies exacerbate the situation, failing to align with the market economy. The study recommends fostering cooperation between university authorities and the community, revising and enforcing regulations, and emphasizing waste generators' responsibility for proper disposal. Addressing these challenges can significantly improve solid waste management and environmental outcomes at Jahangirnagar University.
oai:ojs.ejournal.undip.ac.id:article/7391
2015-02-17T13:19:27Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/7391
2015-02-17T13:19:27Z
Waste Technology
Vol 2, No 2 (2014); 44-51
Liquid and Gaseous Fuel from Waste Plastics by Sequential Pyrolysis and Catalytic Reforming Processes over Indonesian Natural Zeolite Catalysts
Syamsiro, Mochamad; Janabadra University
Cheng, Shuo; Department of Environmental Science and Technology, Tokyo Institute of Technology, G5-8, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502
Hu, Wu; Department of Environmental Science and Technology, Tokyo Institute of Technology, G5-8, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502
Saptoadi, Harwin; Department of Mechanical and Industrial Engineering, Gadjah Mada University, Jl. Grafika 2, Yogyakarta
Pratama, Nosal Nugroho; Department of Mechanical and Industrial Engineering, Gadjah Mada University, Jl. Grafika 2, Yogyakarta 55281, Indonesia
3 Department of Chemistry, Gadjah Mada University, Sekip Utara, Yogyakarta
Trisunaryanti, Wega; Department of Chemistry, Gadjah Mada University, Sekip Utara, Yogyakarta
Yoshikawa, Kunio; Department of Environmental Science and Technology, Tokyo Institute of Technology, G5-8, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502
2014-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/7391
pyrolysis; catalytic reformer; waste plastics; fuels; natural zeolites
en
In this study, the performance of several differently treated natural zeolites in a sequential pyrolysis and catalytic reforming of plastic materials i.e. polypropylene (PP) and polystyrene (PS) were investigated. The experiments were carried out on two stage reactor using semi-batch system. The samples were degraded at 500°C in the pyrolysis reactor and then reformed at 450°C in the catalytic reformer. The results show that the mordenite-type natural zeolites could be used as efficient catalysts for the conversion of PP and PS into liquid and gaseous fuel. The treatment of natural zeolites in HCl solution showed an increase of the surface area and the Si/Al ratio while nickel impregnation increased the activity of catalyst. As a result, liquid product was reduced while gaseous product was increased. For PP, the fraction of gasoline (C5-C12) increased in the presence of catalysts. Natural zeolite catalysts could also be used to decrease the heavy oil fraction (>C20). The gaseous products were found that propene was dominated in all conditions. For PS, propane and propene were the main components of gases in the presence of nickel impregnated natural zeolite catalyst. Propene was dominated in pyrolysis over natural zeolite catalyst. The high quality of gaseous product can be used as a fuel either for driving gas engines or for dual-fuel diesel engine.
oai:ojs.ejournal.undip.ac.id:article/11057
2016-07-27T21:52:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/11057
2016-07-27T21:52:36Z
Waste Technology
Vol 4, No 1 (2016); 16-23
Review – Biogas Technology to Treat Bioethanol Vinasse
Syaichurrozi, Iqbal
2016-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/11057
Bioethanol, Biogas, Technology, Treatment, Vinasse, Waste
en
Bioethanol industries generate by-product that is called vinasse. Vinasse is generated from button product of distillation unit. It has high COD, high TS, high temperature, very low pH and some variety compounds. Because of these contents, vinasse can be discharged directly into the water bodies such as the rivers. Vinasse causes negative impact to environment. Therefore, treatment of vinasse must be done. Vinasse treatment methods that had investigated by some authors are aerobic treatment and anaerobic treatment. Anaerobic treatment is more interesting than aerobic treatment, because it can treat wastewaters that contain high COD and it can produce biogas that can be used as alternative fuels.
oai:ojs.ejournal.undip.ac.id:article/16201
2019-06-28T22:50:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/16201
2019-06-28T22:50:24Z
Waste Technology
Vol 7, No 1 (2019); 19-26
Evaluation of Wastewater Treatment Plant Operating Extended Aeration and Nutrients Removal
Mohammad, Hiba
2019-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/16201
WWTP performance, efficiency removal, BOD , TSS , NO3-. PO4-3
en
Construction of Rwaymiah Waste Water Treatment Plant, (WWTP) in city of Lattakia, Syria since 2011 but until recently it still lacks a continuous evaluation of the performance. WWTP performance evaluation is needed to see how far the efficiency of processing result. This research aims to assess the treatment efficiency and the quality of the final effluent in accordance with the required design standards for Rwaymiah wastewater treatment plant in Lattakia city, working in extended aeration combined with biological nutrients removal (BNR) technology. Laboratory analyzes and measurements periodically for period of the month of January 2013 until the end of January of the year 2016 were conducted for the indicators: biochemical oxygen demand (BOD), total suspended solids (TSS), nitrate (NO3-), phosphate (PO4-3). The results showed that the efficiency of the treatment was good to treat BOD5 and TSS at Rwaymiah WWTP and the final effluent achieved all the required design criteria, average in plant. However, the final effluent did not achieve all the required design criteria of NO3 and PO4-3. In this research, we recommend to the need for periodic measurements at each plant for pollution indicators in order to monitor and adjust the efficiency of treatment facilities
oai:ojs.ejournal.undip.ac.id:article/34719
2020-12-12T11:22:53Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/34719
2020-12-12T11:22:53Z
Waste Technology
Vol 8, No 2 (2020); 39-44
Towards Urban Zero-waste Community through Bulk Stores: Challenges and Opportunities
Sophianingrum, Mada; Diponegoro University
2020-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/34719
zero waste, bulk store
Diponegoro University
en
Zero-waste is a recent phenomenon which is one of the most cost-effective local solution to handle some of the environmental, social and economic challenge in urban area. Urbanization and rising populations will affect the increase in consumption, which in turn will also increase waste production in urban areas. In 2020, it was noted that 24 percent of waste in Indonesia had not been processed properly. Thus, the waste management approach needs to prioritize not only through a qualified technology system but also needs to be supported by the transformation of people's behavior, one of which is through zero-waste. Bulk store is an urban initiative that applies the concept of zero-waste. This shop combines social and entrepreneurial concepts as well as the environment in carrying out its business processes. Through the concept of zero-waste, people must bring their own containers to shop here. This study aims to examine the opportunities and challenges of bulk store as an initiative to achieve zero-waste communities in urban areas. The method used in this research is qualitative approach through interviews and observations with shop owners, consumers and networks. The results obtained from this study are that education is the main factor determining the success of the bulk store. Apart from that, bulk stores also have another role, namely as a market-hub for local producers around urban areas. This makes bulk stores have a strategic role in supporting the zero-waste community
oai:ojs.ejournal.undip.ac.id:article/45147
2022-04-14T08:38:10Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/45147
2022-04-14T08:38:10Z
Waste Technology
Vol 10, No 1 (2022); 17-23
Street waste pickers: A case for Appropriate Technology, Social Entrepreneurship and Innovation
Malele, Vusumuzi; Department of Science and Innovation, DST Building 53, CSIR Campus, Meiring Naude, Brummeria,
2022-04-14 08:38:08
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/45147
Waste pickers; Appropriate Technology platform; Social Entrepreneurship and Innovation platform
en
Street waste pickers, pushing their trolleys, are an everyday sight in many cities in South Africa. These paper reports on the pragmatic approach that was used to explore whether or not waste pickers/collectors need or already have the appropriate technology to conduct their daily activities. In this regard, street waste pickers in the northern part of Pretoria were interviewed to solicit information regarding the access to appropriate technologies and why they think there is a need for such technologies in their environment. The focus of the study was to assess the waste pickers environment as a potential innovation space for appropriate technology (AT). It was found that the environment provide a platform for the development of related AT research and development as well as social entrepreneurship and innovation.
oai:ojs.ejournal.undip.ac.id:article/54225
2023-06-06T16:16:54Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/54225
2023-06-06T16:16:54Z
Waste Technology
Vol 11, No 1 (2023); 28-32
Analysis of Understanding and Attitudes of the Muntilan District Community towards Cell Phone Waste
Afra Inas Nur, Alya; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Dewi Sabrina, Agra; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Nurshillah, Cindy; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Anggorowati, Daravita; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Rachma Putri, Eka; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Hawali Abdul Matin, Hashfi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
2023-05-12 05:53:48
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/54225
en
One of the wastes that includes hazardous and toxic waste is electronic waste. Electronic waste such as phone waste is classified as hazardous and toxic waste based on Government Regulation of the Republic of Indonesia No. 101 of 2014. The number of cellular phone uses in Indonesia is increasing every year, the increasing number of cellular phone users in Indonesia has an impact on the amount of cellular phone waste that if not accompanied by the treatment of cellular phone waste as hazardous and toxic waste will harm the environment. This research aims to determine the understanding of the people of Muntilan District towards electronic waste (cell phone) and to determine the attitude of the people of Muntilan District towards unused cell phones. This research uses descriptive methods with quantitative and qualitative analysis. The data used in the study consists of primary and secondary data, where primary data is obtained through structured interviews. The data obtained from this study are people in Muntilan District are quite familiar with hazardous and toxic waste but most of them did not recognize that cell phone wastes are included in the category of hazardous and toxic waste. The community’s attitudes towards unused cellular phones are to keep the phone.
oai:ojs.ejournal.undip.ac.id:article/6957
2014-07-04T11:12:12Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/6957
2014-07-04T11:12:12Z
Waste Technology
Vol 2, No 1 (2014); 8-12
EFFLUENT TREATMENT OF PHARMACEUTICAL INDUSTRY BY USING SUBSURFACE FLOW WETLAND SYSTEM
Anggraeni, Mega; Master Program of Environmental Science, Diponegoro University
Sunoko, Henna Rya; Master Program of Environmental Science, Diponegoro University
Hadiyanto, Hadiyanto; Chemical Engineering Department, University of Diponegoro
2014-03-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/6957
Canna indica. L. ; Cyperus alternifolius; SSF - Wetland;WWTP effluent of pharmaceutical industry
en
Constructed wetland is one of the alternatives to increase water quality before it flowed into waterways. Sub Surface Flow Wetland System is one type of the constructed wetland for waste water treatment which is using symbiotic relation between water plants and microorganism around rooting system (rhizosphere) in media. Cyperus alternifolius and Canna indica, L. as well as gravel and sand media are plants and medias that can be used in constructed wetland. This research aimed to analyze the effectiveness of plant species between Cyperus alternifolius and Canna indica, L. as well as the effectiveness of gravel and sand media to decrease nitrite, ammoniak, BOD, and COD concentrations. Four reactors SSF-Wetlands with dimension of 120 cm x 30 cm x 50 cm were used in this research. The study was conducted over 12 days following the acclimatization of plants for 7 days. Data analysis were performed by comparing the degradation coefficient (k) of BOD, COD, nitrite, and ammonia concentrations with retention time of the effluent. The results showed that the degradation rate for the reactor with with gravel media and Cyperus alternifolius for nitrite variable was 0.60, ammonia 0.49, BOD 0.45, and COD 0.36. Cyperus alternifolius have a higher effectiveness in reducing the concentration of nitrite, ammonia , BOD and COD than Canna indica , L. Reactors with gravel media have higher effectiveness in reducing BOD , COD , ammonia and nitrite concentration than sand media. Keywords : Canna indica. L. , Cyperus alternifolius, SSF - Wetland, , WWTP effluent of pharmaceutical industry
oai:ojs.ejournal.undip.ac.id:article/9973
2016-05-28T21:47:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/9973
2016-05-28T21:47:24Z
Waste Technology
Vol 3, No 2 (2015); 47-54
Management of Peat Fires on Smoldering Phase (Case Study: District Siak and District Kampar Riau Province)
Syafrudin, Syafrudin; Environmental Engineering Program, Faculty of Engineering, University of Diponegoro
Huboyo, Haryono S.; Environmental Engineering Program, Faculty of Engineering, University of Diponegoro
Nasila D, Bella; Environmental Engineering Program, Faculty of Engineering, University of Diponegoro
2016-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/9973
Air Pollution; Healt; Fire Peat; VOCs, PM 2.5, Buffer Zone
en
The difficulty of finding land for farming activities in Indonesia caused some communities began to switch utilizing peat land for agricultural areas such as oil palm. Oil palm plantation is a commodity that has been developed in Indonesia.Oil palm planted area has increased rapidly.Since 1967 extensive oil palm plantations has increased 35times to 5.6 million ha in 2005 and about 7.8 million ha in 2009. The biggest expansion of oil palm plantations occur in 6 province,one of them is Riau.Most people take a practical way to open agricultural areas by burning peat.Riau Province in Indonesia is one of the major hotspots for peat fires during the dry season. Peat fire at smouldering phaseemits a lot of compounds that are not completely oxidized (e.g. CO, VOCs, PAHs) that more dangerous than the emissions released during combustion at flaming fires. Particulate Matter (PM 2.5) is one of the emissions from peat fires too.However, existing data on VOCs and PM 2.5 of smoke from peat fires Indonesia is still limited.The aim of this study was to analyze the concentration of VOCs and PM 2.5 on emissions from peat fires in the Langkai Village Siak District and RimboPanjang Village Kampar District Riau Province when compared with background site and the permissible exposure limit and provide recommendations based on the results of this research.VOCs measurement method is based on NIOSH 1500 and EPA TO-17 while the PM 2.5 based on IMPROVE A method. The average concentration of PM 2.5 is 996.72 ± 531.01μg/m3. PM2.5 concentrations increased (compared with the background site) was very high at 4,838%.This condition causes a decrease in air quality and serious health problems. While the results of the maximum TVOCs concentration obtained in Siak District was 391,880 g/m3, while in Kampar Districtwas 195,940 g/m3. TVOCs concentration atSiak Districtwas 130.63 times greater than the existing quality standards, while at Kampar District regency was 65.31 times.Environmental improvement recommendations based on the results of this research were buffer zone areadesign to reduce air pollution as a result of peat fires and sealing the ditchs to prevent the spread of fires.
oai:ojs.ejournal.undip.ac.id:article/13697
2018-01-11T21:10:08Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/13697
2018-01-11T21:10:08Z
Waste Technology
Vol 5, No 1 (2017); 9-14
Biogas production potential from a native beverage vinasse of Mexico
Cruz-Salomón, Abumalé; Universidad de Ciencias y Artes de Chiapas
2017-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/13697
anaerobic digestion; UASB; vinasse; COD; biodegradability; BMP
en
This work presents the results of the physicochemical characterization and evaluates the potential of vinasse (a wastewater obtained from local beverage of Chiapas, Mexico) as nutrient source for biogas production by anaerobic digestion in an Upflow Anaerobic Sludge Blanket (UASB) bioreactor. This wastewater contains high level of organic matter, 120.2 ± 18.4 g O2/L of chemical organic demand (COD), 0.77 biodegradability index (BI), and a ratio 21:1 of C/N. The UASB bioreactor had a working volume of 4 L, at 32 oC, 10 days of hydraulic retention time (HRT). The COD removal was of 91 %, the production of methane was 1860 mL/day and 264.83 mL CH4/gCOD of biochemical methane potential (BMP). As such, the UASB bioreactor fed with vinasse can be sustainable alternative for the bioenergy production from wastewater, shifting the paradigm of wastewater management from ‘treatment and disposal’ to ‘beneficial utilization’ as well as ‘profitable endeavor’.
oai:ojs.ejournal.undip.ac.id:article/30514
2020-06-17T23:02:56Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/30514
2020-06-17T23:02:56Z
Waste Technology
Vol 8, No 1 (2020); 22-24
Municipal Waste Management Policy: Kebumen Regency
Chalid Afif Alfajrin, Achmad; Master Program of Environmental Science, School of Post Graduate Studies, Diponegoro University
Adie Nugraha, Fajar; Master Program of Environmental Science, School of Post Graduate Studies, Diponegoro University
Santoso, Budi; Master Program of Environmental Science, School of Post Graduate Studies, Diponegoro University
2020-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/30514
Municipal waste, waste management, kebumen regency
en
Waste management is carried out to utilize the value that is still contained in the waste itself, namely through the process of composting, recycle / recycling, combustion (incineration), and others. Managing waste comes in the five most challenging aspects of managing a city, but strangely this sector receives less attention than other urban issues. The quality of waste services is one indicator of good city governance. Therefore, waste management is still a big challenge for the cities in Indonesia. These challenges include public awareness that is still relatively low, especially those selling in the market, the lack of waste collection facilities, and the limited number of sanitation extension workers so that the intensity of counseling is still low. Every region in Indonesia has its own regional regulations regarding waste management. Policies related to waste management in Kebumen Regency are regulated in the Regional Regulation of Kebumen Regency No. 34 of 2011. The regulation contains a reduction in the volume of waste, statements related to fees, compensation, partnerships, dispute resolution, investigations, and criminal provisions. The Kebumen Regency Public Works Office can manage 840 m³s of garbage every day, but only 320 m³s of garbage can be transported by sanitation workers to Semali TPA and Kaligending TPA. Specifically in the case of specific waste treatment, PKU Muhammadiyah Sruweng Hospital has used 20 closed tube containers with yellow plastic coated 60 liter and replaced every day for medical waste produced. The success of waste management policies in an area is seen from the factors of human resources, communication, facilities and infrastructure, and law.
oai:ojs.ejournal.undip.ac.id:article/42862
2021-11-23T07:43:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/42862
2021-11-23T07:43:36Z
Waste Technology
Vol 9, No 2 (2021); 14-22
Community Awareness and Willingness to Participate in Electronic Waste Management: A Case Study of the District Banjarsari, Surakarta
Hawali Abdul Matin, Hashfi; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Jeffrey Walter Hutauruk, Timothy; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Solikhah, Ivo; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Cantika Widagdo, Novania; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Bayu Paddy EL Maestro Setianto, Rony; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Ardelia Darmastuti, Salma; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Aldila Pramitasari, Thalita; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
2021-11-23 07:43:32
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/42862
en
Hazardous and toxic waste is the residue of a business or activity containing hazardous and toxic materials which due to their nature and concentration or amount, either directly or indirectly pollute or damage and endanger the health of the environment. This study examines the awareness and willingness of the community in the management of electronic waste in Banjarsari District, Surakarta. The objectives of this study are: (i) Knowing the level of awareness of the people of Banjarsari District regarding electronic waste management; (ii) Knowing the level of willingness of the people of Banjarsari District to participate in electronic waste management; and (iii) Provide recommendations for electronic waste management in Banjarsari District. The research method uses a qualitative descriptive approach that prioritizes descriptive data, observations, and interpretations. The technique of collecting data is through primary data obtained from surveys or questionnaires to the people of Banjarsari District and secondary data derived from related literature. The results showed that the level of awareness and understanding of the electronic waste management of the people of Banjarsari District was quite good. The people of Banjarsari District have a high level of willingness to participate in waste management but are reluctant to incur additional costs due to economic and social problems. Recommendations are applied in the management in Banjarsari District by collecting, picking up electronic waste, and collaborating with third parties such as PT. Arah Environmental Indonesia.
oai:ojs.ejournal.undip.ac.id:article/50809
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/50809
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 50-57
Biogas Production from Solid Jamu Waste Production Traditional with Anaerobic Process Liquid State – Anaerobic Digestion (LS - AD) Method
Sumardiono, Siswo; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Jos, Bakti; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Farhan, Abdullah; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Sondang, Nearya; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Cahyono, Heri; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2022-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/50809
en
Biogas is a flammable gas produced from the fermentation process of organic materials by anaerobic bacteria. The principle of making biogas is the anaerobic decomposition of organic matter (closed from free air) to produce gas, mostly methane (CH4) and carbon dioxide (CO2). One source of organic material that can be used as raw material for making biogas is the waste contents of the beef rumen. The anaerobic decomposition process is assisted by a number of microorganisms, especially methane-producing bacteria. The first generation of biogas is biogas produced by food derivatives and the process is still conventional. One of the agricultural wastes that can be developed into biogas is jamu waste. Jamu dregs contain high crude fiber, which is 39.72% of the dry weight. Where crude fiber is thought to help in the fermentation process. This research will examine the effect of time on biogas production with the composition of the raw material for jamu waste, the effect of pre-treatment of C/N ratio on biogas production and the effect of Total Solid Substrate on biogas production. Biogas production is carried out through hydrolysis, acidogenesis and methanogenesis stages. The total solid ratio are set in Liquid State condition with 3, 7, 11 and 15% variant of total solid content and the pretreatment of the nutrient ratio of the substrate C/N 20, 22, 24 and 26. The biogas formation process was carried out for 2 months, with a quantitative test response in the form of biogas volume and CODMn removal per 2 days.
oai:ojs.ejournal.undip.ac.id:article/5739
2013-11-22T14:15:47Z
wastech:ed
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/5739
2013-11-22T14:15:47Z
Waste Technology
Vol 1, No 1 (2013)
Front Cover
editor, wastech; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2013-07-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/5739
en
Front Cover
oai:ojs.ejournal.undip.ac.id:article/8274
2016-02-05T16:55:19Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/8274
2016-02-05T16:55:19Z
Waste Technology
Vol 3, No 1 (2015); 7-13
The effect of pH and operation mode for COD removal of slaughterhouse wastewater with Anaerobic Batch Reactor (ABR)
Dyan, Maria Octoviane; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Putra, Gita Permana; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Budiyono, Budiyono; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Sumardiono, Siswo; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Kusworo, Tutuk Djoko; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2015-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/8274
Liquid Waste SW; COD removal; biodigester ABR; pH; operation mode; COD:N
en
Disposal of industrial wastes in large quantities was not in accordance with today's standards of waste into environmental issues that must be overcome with proper treatment. Similarly, the abattoir wastewater that contains too high organic compounds and suspended solids. The amount of liquid waste disposal Slaughterhouse (SW) with high volume also causes pollution. The research aim to resolve this problem by lowering the levels of BOD-COD to comply with effluent quality standard. Anaerobic process is the right process for slaughterhouse wastewater treatment because of high content of organic compounds that can be utilized by anaerobic bacteria as a growth medium. Some research has been conducted among abattoir wastewater treatment using anaerobic reactors such as ABR, UASB and ASBR. Our research focuses on the search for the optimum results decline effluent COD levels to match the quality standards limbah and cow rumen fluid with biodigester ABR (Anaerobic Batch Reactor). The variables used were PH of 6, 7, and 8, as well as the concentration ratio of COD: N is 400:7; 450:7, and 500:7. COD value is set by the addition of N derived from urea [CO(NH2) 2]. COD levels will be measured daily by water displacement technique. The research’s result for 20 days seen that optimum PH for biogas production was PH 7,719 ml. The optimum PH for COD removal is PH 6, 72.39 %. The operation mode COD:N for biogas production and COD removal is 500:7, with the production value is 601 ml and COD removal value is 63.85 %. The research’s conclusion, the PH optimum for biogas production was PH 7, then the optimum PH for COD removal is PH 6. The optimum operation mode COD:N for biogas production and COD removal was 500:7
oai:ojs.ejournal.undip.ac.id:article/11361
2016-07-27T22:28:48Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/11361
2016-07-27T22:28:48Z
Waste Technology
Vol 4, No 1 (2016); 40-45
Copper Accumulation on Avicennia marina In Tapak, Tugurejo, Semarang, Indonesia
Martuti, Nana Kariada Tri; Diponegoro University
Widianarko, Budi
Yulianto, Bambang
2016-04-14 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/11361
accumulation, Avicennia marina, BCF, Cu, TF
Directorate General of Higher Education of Indonesian Goverment
en
Mangroves are good hyperaccumulators, they are not only able to grow on highly poisonous land, but also accumulate the poisonous substances in the branches and leaves. The aim of the research was to evaluate the bioaccumulation of Cu on Avicennia marina in Tapak Semarang. Tapak Semarang is selected as the research site because the mangrove ecosystem is surrounded by milkfish ponds. The research used ecological approach. Bioaccumulation data and heavy metal translocation in plants, sediment and water were analyzed using pre-determined formulation. Results showed that Cu was found in water (0.0069 mg/l), sediment (26.760-37.889 mg/Kg), roots (2.336-7.997 mg/Kg), young leaves (2.367-6.604 mg/Kg) and old leaves (1.080-6.748 mg/Kg) of Avicennia marina. Sediment have the highest ability to accumulate Cu ( ) compared to water with concentration factors of ranging from 3878.26 to 5491.16. The Bioconcentration Factor (BCF) of roots and sediment was ranging from 0.09 to 0.211, and the Translocation Factors (TF) for young leaves was ranging from 0.83 to 1.54 and for old leaves was ranging from 0.46 to 0.94. It was found that the concentration of Cu in the pond tended to increase towards the sea. It was concluded that there was an accumulation of Cu in the sediment, roots and leaves of Avicennia marina in Tapak, Tugurejo Semarang. The sediment have the highest ability to accumulate Cu from the environment.
oai:ojs.ejournal.undip.ac.id:article/23959
2019-06-28T22:51:46Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/23959
2019-06-28T22:51:46Z
Waste Technology
Vol 7, No 1 (2019); 45-49
Microbubble Characterisation for Ballast Water Treatment on Ships over Indonesian Exclusive Economic Zones
Siswanto, Anggun Puspitarini; Department of Chemical Engineering, Vocational School, Diponegoro University Semarang, Central Java
2019-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/23959
en
In generally, the vessel takes on ballast water as it unloads cargo and discharges ballast water as it loads cargo. It is estimated that approximately 7 billion tons of ballast water is transferred globally each year. The total volume of ballast water onboard a ship can be in excess of 5,000 m3. The organisms and pathogens in the water are not necessarily evenly distributed i.e. there may be patches with higher densities. Int his research, we implement micronbubble technology for Ballast Water Treatment. Principally, bubble could be developed in liquid or gas form. The micro term in microbubble reflects to the proportion which is usually in micrometer of its diameter size. Smaller bubble size is expected to give wider surface area as well as affected to greater mass transfer between its surface and interfacial area. Microbubble characterisation was conducted by using high speed camera for bubble size determination. Moreover, a fluidic oscillator was attached into the system to study the efficacy of bubble distribution within ceramic diffuser.
oai:ojs.ejournal.undip.ac.id:article/48670
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/48670
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 10-17
Hazardous and Toxic Solid Waste Analysis at Covid-19 Isolation Site (Case Study: Hotel X Bojonegoro Regency)
Hawali Abdul Matin, Hashfi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Fadila Setyaputri, Adhistie; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Dwi Restanti, Arlinda; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Wahyu Widyadana Ramadhan, Auriga; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Maulidta Rohman, Cahya; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Asty Pramudita, Desma; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Gita Fitri Sagitarian, Dhea; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
2022-09-20 13:52:25
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/48670
Hazardous and Toxic Solid Waste, Medical Waste, Solid Waste, Covid-19 Isolation Waste Management
en
Covid-19 is one of the pandemics that be a problem in Indonesia. This condition becomes one of the urgencies that must be handling seriously to break the chain of transmission. The one ways to handling can be taken by isolating people who are suspected and infected with the corona virus. Bojonegoro is one of the cities in Indonesia that implemented solutions with isolation. As a seriously action to handling can be seen by making Hotel X Bojonegoro for isolation locations. Handling carried out at this location bring a correlation to the emergence of solid waste from covid patients where it becomes one of the sources of B3 waste. This research aims to find out the management of B3 waste (medical solid) at Hotel X in Bojonegoro Regency which is used as a place for isolation of covid-19 patients. The type of research that used in this study is qualitative descriptive with the location of the research determined intentionally (purposive). This study uses primary data obtained from the results of interview methods and uses secondary data derived from literature studies of various existing data and research and correlated to the theme of this study. The results of the investigation showed that the source of waste came from activities in dealing with covid-19 patients so that all kinds of goods that have contact with patients are considered in this type of waste categorized as B3 waste management is done with coordination on third parties which is taken by officers and brought pharmaceutical and medical device installations (INFALKES) for further handling process. In its processing operations are carried out with incentives of funds provided by the government. With this research, it is expected that the supervision of B3 waste can provide more supervision of B3 waste management in hotels where covid-19 isolation is located.
oai:ojs.ejournal.undip.ac.id:article/59731
2023-12-12T15:23:57Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/59731
2023-12-12T15:23:57Z
Waste Technology
Vol 11, No 2 (2023); 91-96
Awareness of Medical Mask Waste Management for Young People on Central Java and Special Region of Yogyakarta Provinces During the Covid-19 Pandemic
Garnis Perwitasari, Iyualevi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Saniscara Nugraheni, Rachel; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Nur Fadilah, Rizky; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Sagita Armadhan, Winda; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Shafa Alfitra, Zhalzabilla; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Hawali Abdul Matin, Hashfi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
Rachmawati, Siti; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
2023-11-20 02:24:06
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/59731
Medical Mask; Waste Management; Covid-19
en
The Covid 19 pandemic that hit Indonesia caused the problem of increasing medical mask waste. Medical masks are included in B3 waste because they are infectious. Therefore, special treatment is needed to mask waste, so it doesn't transmit disease. This study was conducted to determine the awareness of medical mask waste management in young people, especially those who live in the provinces of Central Java and the Special Region of Yogyakarta. The research was conducted by distributing questionnaires to respondents aged 17-24 years. This research used descriptive analysis with a quantitative approach. Based on the results of the study, it is known that most of them already know the meaning of B3 waste, where 65% of respondents can answer questions correctly about the type of waste and about 95% of respondents considered medical mask waste to be harmful to the surrounding environment. Based on the results of data analysis, it is known that the respondents have shown awareness of the dangers of mask waste, but from the results of the questionnaire, it is also known that the respondents do not have the awareness to process waste. From the 151 respondents, there were only 4 people who did the processing. So that it can be seen that the level of awareness of medical waste management in young people, especially those who live in the Province of Central Java and the Special Region of Yogyakarta is still very low. The results of the questionnaire also show that there are still few TPS specifically for hazardous waste around the settlements.
oai:ojs.ejournal.undip.ac.id:article/5734
2013-11-22T14:25:52Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/5734
2013-11-22T14:25:52Z
Waste Technology
Vol 1, No 1 (2013); 1-5
Biogas production from bioethanol waste: the effect of pH and urea addition to biogas production rate
Budiyono, Budiyono; (Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Syaichurrozi, Iqbal; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Sumardiono, Siswo; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2013-07-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/5734
bioethanol waste; biogas production; initial pH; urea addition; pH control
en
Anaerobic treatment is a good choice to treat bioethanol waste due to the high concentration of COD content for producing biogas as renewable energy. The purposes of this study were to study the effect of addition nitrogen source and pH control to biogas production. The laboratory scale-anaerobic digestions used in this experiment were operated in batch system and at room temperature. In determination of optimum pH, bioethanol waste and rumen fluid fed into digesters with initial pH 6.0; 7.0 and 8.0. Influent COD : N ratio (in form of urea) used in this study was 700:7 in compare to control. The results showed that initial pH 7.0 produced the most biogas with total biogas 3.81 mL/g COD. While initial pH 6 and pH 8 had total biogas 3.25 mL/g COD and 3.49 mL/g COD respectively. At urea addition, biogas formed had 52.47% greater than that of at without urea addition (control variable). Controlled pH caused biogas was produced until 90-day investigation and might continue to be produced. Total biogas of control variable (without urea addition) and variable with ratio COD:N=700:7 influent were 11.07 mL/g COD and 11.41 mL/g COD respectively.Doi: http://dx.doi.org/10.12777/wastech.1.1.1-5Citation: Budiyono, Syaichurrozi, I. and Sumardiono, S. 2013. Biogas production from bioethanol waste: the effect of pH andurea addition to biogas production rate. Waste Technology 1(1):1-5. Doi: http://dx.doi.org/10.12777/wastech.1.1.1-5
oai:ojs.ejournal.undip.ac.id:article/7824
2015-02-17T13:19:27Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/7824
2015-02-17T13:19:27Z
Waste Technology
Vol 2, No 2 (2014); 41-43
Study of Chlorination Application in Tapioca Wastewater Cyanide Removal
Mulyani, Happy; Setia Budi University
Prasadja, Maria Endah; Setia Budi University
2014-10-24 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/7824
Tapioca wastewater, chlorination, cyanide, Tri Halo Methane, calcium hypochlorite dosage, pH
ind
Tapioca wastewater contains a high concentration of organic matter and cyanide. Chlorination has known as one of alternative cyanide removal methods. The fact that must be an attention is carcinogenic compound such as Tri Halo Methane could be produced as byproduct chlorination of organic waste. This research aimed to determine condition of chlorination application in tapioca wastewater cyanide removal especially calcium hypochlorite dosage and pH thus meeting the criteria of the quality standard of waste and Tri Halo Methane identification. Efluent of chlorination using calcium hypochlorite dosage based on stoichiometry reaction between chlor and cyanide (mole ratio chlor:cyanide = 1:1) which carried out at pH operation 8 for 60 minutes has observed for cyanide content and Tri Halo Methane identification. Other variation of calcium hypochlorite dosage applied until meet the standart quality or lower cyanide content of effluent with no Tri Halo Methane detected. pH optimum determined from comparation of quality effluent of chlorination using calcium hypochlorite optimum dosage with variation pH operation 6, 7, 8. The results showed that the optimum condition for chlorination application in tapioca wastewater removal was 5,986 mg/L for calcium hypochlorite dosage (1,75 stoichiometry reaction) and 8 for pH operation. This chlorination condition able to reduce cyanide of 192 mg/L to 0,272 mg/L wuth no Tri Halo Methane detected in the effluent.
oai:ojs.ejournal.undip.ac.id:article/10193
2016-07-27T21:52:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/10193
2016-07-27T21:52:36Z
Waste Technology
Vol 4, No 1 (2016); 24-30
Bioacoustic Spectral Whistle Sound And Behaviour Of Male Dolphin Bottle Nose ( Tursiops aduncus) At Safari Park Indonesia, Cisarua Bogor
Lubis, Muhamad Zainuddin; Bogor Agricultural University in mayor Marine Science And Technology
Pujiyati, Sri; Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences Bogor Agricultural University Jln. Agatis, Kampus IPB Dramaga Bogor
Hestirianoto, Totok; Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences Bogor Agricultural University Jln. Agatis, Kampus IPB Dramaga Bogor
2016-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/10193
Bioacoustic, male dolphins bottle nose (Tursiop aduncus), salinity, frequency , Intensity.
en
Whistle sound is generally used for echolocation purposes, while the sound of the blast-beat and whistles play a major role in internal and inter-group communication.The purpose of this research is to know the power spectral patterns and fluctuations in sound based on frequency and Power Spectral Density (PSD) of the sounds produced by dolphins and observing the position of dolphins , Noisy Time Domain (NTD) and behavior using underwater camera, and also comparing between time and sound spectrum. Data recording was taken at tha Safari Park of Cisarua Bogor in Indonesia, by taking data in show pool and show pool. The results showed that salinity before feeding time in the show pool with replication 1,2, and 3 has salinity value that is equal to 30 ‰. Data at the show pool before feeding with replications 1,2, and 3 has a salinity of 29 ‰. Power Spectral Density (PSD) of the whistle sound before feeding was different from one another, but it has the same frequency range. The highest intensity values is at sound whistle 3 before feeding time at the show pool with an intensity value of 28.03 dB with frequency interval of 14 642 Hz-16000 Hz. F-test at the show pool before meals has heterogeneous value. Treat before meals at the show pool has a value of P <0.001 and P <0.001. Value Noisy Time Domain have differences with each other and have a lot of different sound patterns. In general, there are real differences are evidenced by F test on a range of time at each whistle on physiotherapy and swimming pool show in the time before meals. The position of dolphins in a pool show more dominant and often in the bottom of the pool, the position of the dolphins affect the frequency.
oai:ojs.ejournal.undip.ac.id:article/16924
2019-06-28T22:50:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/16924
2019-06-28T22:50:24Z
Waste Technology
Vol 7, No 1 (2019); 11-13
UTILIZATION OF WATER HYACINTH AS ACQUIRED BIOGAS, LIQUID FERTILIZER AND CONTROL ITS SPREAD
Hadiyarto, Agus; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Alfiyanti, Alfiyanti; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Alwi, Deo Reynaldo; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Angga Putra, Noor Hanifah; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2019-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/16924
en
Calombo hamlet, Semarang Regency has a population of 1,125 peoples, live at coast side of Rawapening Lake. Much of the water hyacinth covered Rawapening Lake thus decreasing fisheries production. The growth of water hyacinth has been decreased by using it as craft materials and compost, but not optimally. Need other efforts to reduce the density for example convert or utilize water hyacinth for biogas and liquid fertilizer. The objectives of the programs are approach the society by socializing about the benefits of water hyacinth convert to biogas and liquid fertilizer, to train skilled of people to build a biogas unit. The result of this programs makes a biogas unit MERCEDES (Mesophilic Reactor Anaerobic Digestion) which produces biogas and liquid fertilizer. The economic potential is obtained if all households apply them (equivalent with energy) about IDR 17.112 million per year, a liquid fertilizer about IDR 200.000 per household per day, the environmental potential reduction of water hyacinth growth about 6-15% per year, providing knowledge to the community to build a biogas unit and Mr. Musyafa has been utilize the biogas and fertilizer and have formed the structure of the organization to manage and develop the biogas unit for sustainability the program.
oai:ojs.ejournal.undip.ac.id:article/36278
2021-06-16T21:28:22Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/36278
2021-06-16T21:28:22Z
Waste Technology
Vol 9, No 1 (2021); 20-24
The Innovation of Tofu Waste Liquid Biogas Reactor Technology as an Alternative Energy Resource
Mufarida, Nely Ana; Universitas Muhammadiyah Jember
Abidin, Asroful; Universitas Muhammadiyah Jember
2021-06-16 21:28:21
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/36278
Renewable Energy, Design, Tofu Liquid Waste, Digester, Biogas.
en
Abstract - Increased production capacity of the tofu factory has an impact on increasing waste. Tofu liquid waste is one of the untapped wastes and even just thrown away. Besides, the tofu industry needs water for its processing, so more wastewater produces more than tofu solid waste. Wastewater from the making tofu process produces liquid waste which is a source of pollution for humans and the environment that will disrupt the ecosystem and environmental health.The right process for handling tofu wastewater is by an anaerobic process that converts the liquid waste fermented by bacteria into methane gas. This methane gas can be used as a new energy resource and this energy can be used for cooking or frying tofu.The results of the research are from 500 liters of tofu liquid waste treated, 149.6 liters of biogas were obtained in 21 days. It increased the quality of biogas as seen from the increase in CH4 levels by 70%, temperature in the digester by 32oC, volume in 149.6 liters, and decreasing H2S levels by 9 ppm, CO by 13 ppm, O2 by 15.1%. Based on the test results, the maximum fermentation time is 21 days.
oai:ojs.ejournal.undip.ac.id:article/45785
2022-04-14T08:38:10Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/45785
2022-04-14T08:38:10Z
Waste Technology
Vol 10, No 1 (2022); 24-29
Awareness Analysis of Batik Craftsmen Regarding the Toxic and Hazardous Waste of the Batik Industry in Kampung Batik Laweyan (Case Study: Afina Batik)
Hawali Abdul Matin, Hashfi; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Nur Sulton, Muhammad; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Erwantyo Nugroho, Mochamad; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Nurwulandari, Murni; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Chandrasari, Nurma; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Salsabila Izdihar, Rinoa; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Ainaya Risyafa, Zuhro; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
2022-04-14 08:38:08
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/45785
batik industry, chemicals, dyes, toxic and hazardous waste, waste management
en
The Batik industry is one of the industrial sectors that has an important role in improving the economy. As time goes by, the demand for batik is increasing. Not only favored by adults and the upper class, but batik is also increasingly favored by the youngsters. Therefore, batik industry craftsmen continue to follow technological developments in order to be able to meet the demand for batik, as in the batik industrial area of Kampung Batik Laweyan. Some of the equipment used is still relatively simple, but the use of chemicals has been carried out for quite a long time because the price of batik materials continues to increase. In fact, if the industrial waste is not handled properly, it can pollute the river. This shows that some batik industry perpetrators do not yet have a full level of awareness and responsibility for the output of batik making. Therefore, comprehensive research is needed on toxic and hazardous waste management in order to determine the perception of craftsmen towards toxic and hazardous waste and increase the awareness of craftsmen towards toxic and hazardous waste. Based on research conducted at Afina Batik using a combination of quantitative and qualitative approaches, information was obtained that some craftsmen did not know the types and dangers of chemical waste produced. In fact, there are chemicals used in the coloring process, such as napthol and chrome soga, which pose a risk of danger.
oai:ojs.ejournal.undip.ac.id:article/48504
2023-06-06T16:16:54Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/48504
2023-06-06T16:16:54Z
Waste Technology
Vol 11, No 1 (2023); 33-41
The study of waste composition in Joe Slovo Township, Nelson Mandela Bay Municipality, South Africa
Adeniran, Adeleye Ayoade; Nelson Mandela University, South Africa
Mngomezulu, Sibongangani Khonelihle; Nelson Mandela University, South Africa
Mbanga, Sijekula; Nelson Mandela University
Shakantu, Winston; Nelson Mandela University
2023-05-12 05:53:50
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/48504
Waste; Waste composition; Household waste; Municipal solid waste
en
Household waste (HW) forms a vital part of municipal solid waste (MSW), and the inadequate management of HW poses a serious challenge in many developing cities. A study of the composition of HW is therefore vital in designing an effective solid waste management plan for cities and towns. A waste composition study is also important as estimating waste types produced and treatments applied can be an important tool for discerning what technology can be utilised for waste management trends. The study evaluated the composition of household solid waste generation in Joe Slovo township (JST) using a mixed-method research design to identify waste characteristics. The study's methodology included evaluating literature and administering structured questionnaires. The data were analysed using SPSS and presented in simple tables and charts. The waste typology produced by the residents are metals, papers, bottles, plastic materials, and food remains, among others. In addition, most waste typology produced by JST is recyclable. The results revealed that JST has no significant difference in the type of waste produced when comparing male and female respondents. The study recommends that the waste typology generated by JST can be utilised as a resource to develop economic income through recycling.
oai:ojs.ejournal.undip.ac.id:article/7053
2014-07-04T11:12:12Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/7053
2014-07-04T11:12:12Z
Waste Technology
Vol 2, No 1 (2014); 13-16
Phycoremediation of waste water from a plastic manufacturing industry with Chlorella pyrenoidosa H.Chick in laboratory study
https://ejournal.undip.ac.id/index.php/wastech/article/download/7053/15068
Sari, Kenanga; Department of Biology, Diponegoro University
Jalan Prof. H. Soedarto, SH. Tembalang Semarang
Soeprobowati, Tri Retnaningsih; Department of Biology, Diponegoro University
Jalan Prof. H. Soedarto, SH. Tembalang Semarang
Hariyati, Riche; Department of Biology, Diponegoro University
Jalan Prof. H. Soedarto, SH. Tembalang Semarang
2014-03-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/7053
Chlorella pyrenoidosa, phycoremediation, water, plastic, copper.
Kenanga Sari, Tri Retnaningsih Soeprobowati, Riche Hariyati Department of Biology, Diponegoro University
en
Abstrack - The plastic industries has increased by 7-8% per year, it will cause a negative impact for the environment. The wastewater of plastic industrial contain many pollutants such as hazardous substances bensen, formaldehyde and heavy metals (Cd, Cu, Cr and Pb). Heavy metals Cu is the most dangerous heavy metals since Cu can inhibit enzyme systems, remediation are needed to reduce the pollutants in the environment. One effective way is by using Chlorella pyrenoidosa H.Chick as phycoremediation agent. This study aims to assess the percentage of population growth and decline of heavy metals Cu after inoculation with C. pyrenoidosa H.Chick. The method used is to cultivate C. pyrenoidosa H.Chick in plastic wastewater for 8 days and observed a decrease of percentage heavy metal Cu and population growh of C.pyrenoidosa H.Chick. Environmental factors such as temperature, salinity, pH, light intensity is maintained in order to remain stable. The data obtained with T test. After 8 days of the study turned out that C. pyrenoidosa H.Chick able to reduce Cu of 0.435 mg / l to 0.24 mg / l within 8 days and decrease percentage is 44.83%, thus meeting the criteria of the quality standard of waste according to the PP. 82 of 2001 in the amount of 0.2 ppm and safe for environment. Keywords: Chlorella pyrenoidosa, phycoremediation, water, plastic, copper.
oai:ojs.ejournal.undip.ac.id:article/10136
2016-06-11T21:48:53Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/10136
2016-06-11T21:48:53Z
Waste Technology
Vol 1, No 2 (2013); 6-9
EVALUATION OF ORGANIC RICE AGRICULTURE SYSTEM (ORAS) IN THE SEMARANG DISTRICT
Estuningtyas, Dwi Erlina; Master of Environmental Science, Graduate Program, Universitas Diponegoro
Izzati, Muniffatul; Department of Biology, Faculty of Science and Mathematics, Universitas Diponegoro
Purnaweni, Hartuti; Faculty of Social and Political Science, Universitas Diponegoro
2013-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/10136
SPPO; organic agriculture; evaluation; Semarang District; program analysis
en
Along with the increasing public awareness of environmental issues, health, and food safety and quality and make awareness of the importance of organic farming in several countries around the world, including in Indonesia is increasing rapidly. This study aims to analyze the program and implementation of organic rice farming system in the District of Semarang. The research was conducted in the District of Semarang District Susukan starting from April 2013 until August 2013. Secondary data used for the analysis and evaluation of organic rice farming program from the data of 5 (five) years. Secondary data were obtained from farmer groups and related agencies such as the Department of Agriculture, Plantation and Forestry, Bappeda, as well as the Agricultural Extension Center. Primary data obtained from direct observations in the field using the questionnaire in the sample set. Primary data from observational observations made in the current year at the sites. Variable / fenomea observed include compatibility between the implementation of organic rice farming in the community with the criteria of organic farming. The results showed that farmers have carried out SPPO with a percentage of 83.3 percent and 16.7 percent SPK. Basically, organic rice cultivation activities in Semarang district actually can not be said to be fully as organic rice farming, or more accurately described as semi-organic farming systems.
oai:ojs.ejournal.undip.ac.id:article/13553
2018-01-11T21:10:08Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/13553
2018-01-11T21:10:08Z
Waste Technology
Vol 5, No 1 (2017); 15-20
Daily Accumulation and Impacts of Marine Litter on The Shores of Selayar Island Coast, South Sulawesi
Hermawan, Roni; Bogor Agricultural University
Damar, Ario; Bogor Agricultural University
Hariyadi, Sigid; Bogor Agricultural University
2017-04-13 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/13553
en
West coast of Selayar facing solid marine litter during west monsoon period December until March, marine litter come from floating litter, carried by sea surface current and deposited along the west coast. Marine litter deposited on the west coast affected social, economic and ecological. This study aims to determine type, weight, density and distribution of marine litter; the impact of litter on water quality; the impact of economic, social and environmental ecosystems. Retrieved data using line transect at 7 observation points. Litter size were observed (> 2.5 cm) or macro litter. Floating litter and daily incresing of litters were also analyzed. Inorganic waste density is 14.3 ± 2.97 items/m2 for the number of pieces and 564.8 ± 196.1 g/m2 for waste weight. Daily accumulation was about 1 445 ± 1 743 g/m/day, the number of pieces 14.3 ± 8 item/m/day, cubication 0.0187 ± 0.019 m3/m/day. The impacts on seagrass and biota such as broken leaves, crushed and organism rafting on floating litter some types of coral such as Favia fragum, types of crustaceans such as Balanus. sp, Lepas. sp, Dosima. sp which affect the bio-diversity.
oai:ojs.ejournal.undip.ac.id:article/30968
2020-06-17T23:02:56Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/30968
2020-06-17T23:02:56Z
Waste Technology
Vol 8, No 1 (2020); 25-28
Utilization of Rambutan (Naphelium lappaceum L) Peel’s Waste is Becoming More Useful As a Natural Dye of Fabrics
https://ejournal.undip.ac.id/index.php/wastech/article/download/30968/90500
Kusumayanti, Heny; Chemical Engineering, Vocational School, Diponegoro University, Jl. Prof. Soedarto, Semarang 50275, Indonesia
Paramita, Vita; Chemical Engineering, Vocational School, Diponegoro University, Jl. Prof. Soedarto, Semarang 50275, Indonesia
Amalia, Rizka; Chemical Engineering, Vocational School, Diponegoro University, Jl. Prof. Soedarto, Semarang 50275, Indonesia
Wahyuningsih, Wahyuningsih; Chemical Engineering, Vocational School, Diponegoro University, Jl. Prof. Soedarto, Semarang 50275, Indonesia
2020-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/30968
natural dye, rambutan peels, alum, lime, ferro sulphate
en
The demand to find an alternatives source of fabric dyes is increasing nowadays, specifically for natural dye. Applying natural dye in fabric, giving important effect of more environmentally friendly than synthetic dye. One of the natural colors that can be used is Naphelium lappaceum L peel’s waste. The method used is dyeing a cloth with extract of Naphelium lappaceum L peels. Variables applied are extract concentration, type of fixation and concentration of fixation. The results of dyeing cotton fabric using Naphelium lappaceum L peel extract show that the use of alum solution as fixation materials provides brown light color, yellowish brown for lime, and blackish grey for ferro sulphate. The different extract concentration resulted significant effect on the colour radiance on fabric.
oai:ojs.ejournal.undip.ac.id:article/41204
2021-11-23T07:43:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/41204
2021-11-23T07:43:36Z
Waste Technology
Vol 9, No 2 (2021); 23-28
Employing Watermelon rind, Polyurethane Sponges, and Cotton fibers as Bio-carriers
mansour, mohammed; Lecturer
2021-11-23 07:43:34
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/41204
Integrated fixed film activated sludge; bio-carrier; watermelon; Polyurethane sponges; Cotton fibers
en
Water scarcity in Egypt is a critical issue that threats all the life fields such as industry and agriculture sectors. So, searching for alternative water resources was the key solution by depending on treating dairy wastewater in order to provide sufficient treated water enough to reuse in other fields. Integrated fixed film activated sludge process (IFAS) was employed as a biological treatment process. A laboratory pilot was established as a simulation of the biological treatment process. The laboratory pilot consists of primary sedimentation tank, aeration tank, and final settling tank with dimensions of 50 × 25× 25 cm for each. Three bio-carriers were used as IFAS Media with different filling ratio in order to achieve COD, BOD, TN, and TP removal efficiency. Watermelon rind was used in the first experimental trial, then Polyurethane sponges in the second experimental trial, and Cotton fibers in the third experimental trial. After analyzing the physicochemical characteristics of dairy wastewater samples, it was clear that Cotton fibers was the most effective in removing BOD, BOD, TN, and TP concentrations with removal efficiency of 88.35%, 88.3%, 76 %, and 69.3% respectively.
oai:ojs.ejournal.undip.ac.id:article/50841
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/50841
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 58-66
The Effect of Sawdust Concentration on Biogas Production from Chicken Dung in Anaerobic Co-Digestion
Budiyono, Budiyono; Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro
Christian Timothy Prasetyo, Andrew; Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro
Sheilla Kristiani Handoko, Grace; Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro
Hawali Abdul Matin, Hashfi; Environmental Science, Faculty of Mathematic and Natural Science, Universitas Sebelas Maret
2022-12-16 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/50841
Biogas, Chicken Dung, Sawdust, Anaerobic Co-Digestion
en
Resources of oil and natural gas which are derived from fossil energy are wane more and more. One of the research of alternative energy are the production of biogas. Biogas is formed when organic material is degraded by microorganisms in anerobic conditions. Biogas consists of methane gas (50-70%), carbon dioxide (30-50%), and also includes small amounts of other compounds such as hydrogen sulfide (H2S), nitrogen gas (N2) and water vapor. The purpose of this study is to examine the effect of pretreatment on the biogas yield produced, examine the effect of adding nutrients to the biogas yield produced, and examine the effect of the C/N ratio value on the biogas yield produced. Anaerobic fermentation is a series of biological processes that convert organic matter into CH4 and CO2 and also convert S compounds to H2S in the absence of oxygen (O2) by anaerobic microorganisms consisting of four primary stages. In biogas production research, the variables used are the C/N ratio, pretreatment of raw materials, and the addition of nutrients. This research includes three processes, there are the preparation process, the operation process, and the result analysis. It is known that chemical pretreatment using acids results in greater biogas products. Then, the results were obtained that biogas with C/N 30 produced more biogas products. The liquid state (L-AD) method produces more biogas than the solid state (SS-AD) method. The HCl pretreatment variable with C/N ratio of 30, and TS 10% produces the largest kinetics rate compared to other variables.
oai:ojs.ejournal.undip.ac.id:article/5740
2013-11-22T14:16:16Z
wastech:ed
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/5740
2013-11-22T14:16:16Z
Waste Technology
Vol 1, No 1 (2013); i-iii
Editorial (aim and scope, editorial board)
editor, wastech; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2013-07-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/5740
en
editorial
oai:ojs.ejournal.undip.ac.id:article/8479
2016-02-05T16:55:19Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/8479
2016-02-05T16:55:19Z
Waste Technology
Vol 3, No 1 (2015); 14-21
The Utilization of Bottom Ash Coal for Briquette Products by Adding Teak Leaves Charcoal, Coconut Shell Charcoal, and Rice Husk Charcoal
Syafrudin, Syafrudin; Environmental Engineering Department, Faculty of Engineering, Diponegoro University Semarang
Zaman, Badrus; Environmental Engineering Department, Faculty of Engineering, Diponegoro University Semarang
Indriyani, Indriyani; Environmental Engineering Department, Faculty of Engineering, Diponegoro University Semarang
Erga, A. Stevie; Environmental Engineering Department, Faculty of Engineering, Diponegoro University Semarang
Natalia, H. Bunga; Environmental Engineering Department, Faculty of Engineering, Diponegoro University Semarang
2015-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/8479
bottom ash; teak leaves; coconut shell; rice husk; briquette
en
The limitations of the availability of energy sources especially fuel oil has become a serious threat for the society. The use of coal for energy source as the replacement of fuel oil, in one hand, is very profitable, but on the other hand, will cause problem which is the coal ash residue. This coal ash is a by-product of coal combustion. This coal ash contains bottom ash. Through this observation, the bottom ash can be processed to be charcoal if added by teak leaves, coconut shell, and rice husk. Also, this observation needs to add binder materials for further processing in order to form briquette. It can be used as alternative fuel, the utilization of bottom ash and biomass will give positive impact to the environment. This observation was conducted by using compositions such as bottom ash, teak leaves, coconut shell, and rice husk. The treatment was using comparison 100%:0% ; 80%:20% ; 60%:40% ; 50%:50% ; 40%:60% ; 20%:80% ; 0%:100%. The result that the best briquette was on the composition of 20% bottom ash : 80% coconut shell. The characteristic values from that composition were moisture content of 3.45%, ash content of 17,32%, calorific value of 7.945,72 Cal/gr, compressive strength of 2,18 kg/cm2, level of CO of 105 mg/m3, and heavy metals Cu of 29,83 µg/g and Zn 32,99 µg/g. The characteristic value from each briquette composition treatment showed that the increasing usage proportion of biomass as added material for briquette was able to increase its moisture content and calorific value. Besides, it is also able to decrease its ash content and compressive strength
oai:ojs.ejournal.undip.ac.id:article/11509
2017-10-23T20:54:42Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/11509
2017-10-23T20:54:42Z
Waste Technology
Vol 4, No 2 (2016); 9-14
THE USE OF MOLECULAR MARKERS METALOTHIONEIN PROTEIN FOR MONITORING MARINE POLLUTION DUE TO HEAVY METALS MERCURY IN Apogon beauforti IN AMBON BAY
https://ejournal.undip.ac.id/index.php/wastech/article/download/11509/26316
Rumahlatu, Dominggus; Pattimura University
Leiwakabessy, Fredy; Pattimura University
2016-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/11509
Heavy metals Hg, MT-1 protein, Apogon beauforti.
Pattimura University
en
The heavy metal Hg is a global issue because it is toxic to living organisms. Therefore, monitoring levels of Hg in Ambon Bay is important to do. This is a study about monitoring the levels of heavy metals Hg in the waters of Ambon Bay in 2013 and 2014 by using Apogon beauforti as bio-indicators and Metalothionein-1 (MT-1) as a biomarker to determine the accumulation of Hg in relation to the concentration and expression of MT-1 in the tissue of A. beauforti. The samples used were 50 fish of A. beauforti taken at four different stations with purposive sampling procedure. The analysis of Hg content used AAS method, the expression of MT-1 was determined by western blotting method, and MT-1 concentrations were determined by using ELISA method in the laboratory of Brawijaya University. On the average, the results of the analysis of Hg content indicated that the accumulation of heavy metal Hg varied in four different stations. The levels of Hg in the tissue of A. beauforti in 2014 at station 1 increased, while the levels of Hg at stations 2, 3, and 4 decreased. However, the calculation results of MT-1 concentration by ELISA showed an increase in the concentration of MT-1 in 2014 compared to that in 2013. This result was supported with the fact that the protein tape expressed on the test results of western blotting was very thick. It indicated that the longer the organism exposed to heavy metals Hg, the more increased the accumulation of Hg. Thus, the expression and the concentration of MT-1 would also increase.
oai:ojs.ejournal.undip.ac.id:article/30386
2020-06-17T23:02:56Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/30386
2020-06-17T23:02:56Z
Waste Technology
Vol 8, No 1 (2020); 8-11
Correlation of Heat Stress to Hydration Status of Workers at Weaving Section of Tekstile Industries
Prayitno, Danang Adi; Universitas Sebelas Maret
Rachmawati, Siti; Universitas Sebelas Maret
Widjan, Maria Paskanita; Universitas Sebelas Maret
Abdul Matin, Hashfi Hawali; Universitas Sebelas Maret
2020-05-31 13:11:44
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/30386
Heat Stress; Hydration Status.
en
Abstract.PT X is a company plastics and textiles that has 3 section of the production process, one of which is the weaving section. During work, workers are exposed to heat stress which can affect hydration status. The objective of the research is to investigate the correlation of heat stress to hydration status of the workers at weaving section PT X. This research used the observational analytical research method with cross sectional approach. Its population was all of morning work with 60 workers at weaving section PT Kusuma Mulia Plasindo Infitex Klaten. Proposive sampling was used to determine its samples. They consisted of 37 workers. The heat stress was measured with Heat Stress Area and hydration status using urine specific gravity laboratory tests conducted by Solo Laboratory. The data were processed and analyzed by using the Spearman test. The result of this research show that the heat stress had a correlation with hydration status as indicated by the p-value = 0,001.
oai:ojs.ejournal.undip.ac.id:article/45602
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/45602
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 18-23
A Review of Biopolymer-Based Membrane and Its Application in Oil Emulsion Wastewater Treatment
Amal, Daffa Ikhlasul; Diponegoro University
2022-09-20 13:52:25
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/45602
oil emulsion; wastewater; ultrafiltration; biopolymer membrane
en
This review paper will conduct mainly about oil-water emulsion treatment using biopolymer-based ultrafiltration membrane. Oil emulsion wastewater mainly use ultrafiltration process for its treatment due to its continuable process, high efficiency and low energy usage but they are relied on conventional non-degradable membrane which is made from synthetic polymer. The usage of conventional non-degradable membrane has given another waste problem in which reduces the sustainability of ultrafiltration process based on environmental perspective, therefore the degradable membrane material should be developed to increase its sustainability and reduce another waste problem. Biopolymer development has reach numbers in several years, it developing within year to year. Biopolymer such as chitosan, alginate and polylactic acid can be applied on ultrafiltration system in which it can be degradable through bio-degradation with or without modification. Modification through biopolymer in membrane fabrication for ultrafiltration will improve some characteristic that can lead to high efficiency and compability in ultrafiltration process especially for oil emulsion wastewater treatment.
oai:ojs.ejournal.undip.ac.id:article/57213
2023-12-12T15:23:57Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/57213
2023-12-12T15:23:57Z
Waste Technology
Vol 11, No 2 (2023); 97-101
Effect of Water Content on Free Fatty Acid Value Reduction in Nyamplung Crude Oil (Calophyllum Inophyllum L.) Extracted by N-Hexane Solvent and Using Factorial Design Experiment
Maulidinoor, Farah Salsabillah; Diponegoro University
Broto, Wisnu; Diponegoro University
2023-11-20 02:24:06
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/57213
optimization, raw material
en
This study aims to determine the effect of water content on free fatty acid levels in nyamplung (Calophyllum inophyllum L.) seed oil. Nyamplung fruit seeds have a relatively high oil content ranging from 40%-73%, which can be used as a biodiesel raw material. Nyamplung seed oil has a high FFA content that ranges from 15%-30%. The process of extracting nyamplung seed oil is done by the soxhletation method because it is considered the most efficient and uses nhexane solvent, which has non-polar properties and can increase oil yield (more than 50%). This study will use the factorial design level 2 method to determine the most influential process variables to produce optimum operating conditions in making nyamplung seed oil with the lowest FFA content. The variables used in this study are moisture content (8% and 12%), particle size (15 mesh and 25 mesh), and the ratio of materials and solvents (1:1 and 1:3). The analysis results showed that water content had the most significant influence on free fatty acid content with a value of 0.25 and the lowest free fat content of 13.30%.
oai:ojs.ejournal.undip.ac.id:article/5735
2013-11-22T14:15:47Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/5735
2013-11-22T14:15:47Z
Waste Technology
Vol 1, No 1 (2013); 6-9
Biodiesel Production from Microalgae by Extraction – Transesterification Method
Thao, Nguyen Thi Phuong; Faculty of Environment, Ho Chi Minh City University of Technology (HCMUT)
Thanh Tin, Nguyen; Faculty of Environment, Ho Chi Minh City University of Technology (HCMUT)
Thanh, Bui Xuan; Faculty of Environment, Ho Chi Minh City University of Technology (HCMUT)
2013-07-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/5735
biodiesel; microalgae; extraction – transesterification; fatty acid methyl esters (FAMEs); ASTM standard
en
The environmental impact of using petroleum fuels has led to a quest to find a suitable alternative fuel source. In this study, microalgae were explored as a highly potential feedstock to produce biodiesel fuel. Firstly, algal oil is extracted from algal biomass by using organic solvents (n–hexan). Lipid is contained in microalgae up to 60% of their weight. Then, Biodiesel is created through a chemical reaction known as transesterification between algal oil and alcohol (methanol) with strong acid (such as H2SO4) as the catalyst. The extraction – transesterification method resulted in a high biodiesel yield (10 % of algal biomass) and high FAMEs content (5.2 % of algal biomass). Biodiesel production from microalgae was studied through experimental investigation of transesterification conditions such as reaction time, methanol to oil ration and catalyst dosage which are deemed to have main impact on reaction conversion efficiency. All the parameters which were characterized for purified biodiesel such as free glycerin, total glycerin, flash point, sulfur content were analyzed according to ASTM standardDoi: http://dx.doi.org/10.12777/wastech.1.1.6-9Citation: Thao, N.T.P., Tin, N.T., and Thanh, B.X. 2013. Biodiesel Production from Microalgae by Extraction – Transesterification Method. Waste Technology 1(1):6-9. Doi: http://dx.doi.org/10.12777/wastech.1.1.6-9
oai:ojs.ejournal.undip.ac.id:article/8013
2015-02-17T13:19:27Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/8013
2015-02-17T13:19:27Z
Waste Technology
Vol 2, No 2 (2014); 52-55
ACCUMULATION LEVEL AND POLLUTION STATE OF ZINC (Zn) WITHIN MANGROVE FOREST SEDIMENT AND WATER OF DEMAK COASTAL REGION
Hastuti, Endah Dwi; Diponegoro University
2015-01-14 15:40:25
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/8013
en
Zinc (Zn) is essential heavy metal for plant growth, but could be lethal for some aquatic organisms. While its accumulation in mangrove ecosystem increased along with the increasing input to the river runoff. This research aimed to observe the concentration of Zn in mangrove sediment and water within mangrove ecosystem in Demak coastal area and its pollution state. This research was conducted through observation involving 4 sampling stations and 3 sampling transects at each station. Data collection including mangrove structure and concentration of Zn in mangrove sediment and water. The result showed that mangrove distribution along Demak coastal area varied among stations. Station 1 and station 2 consist of Avicennia marina only, while station 3 consist of Avicennia marina and Rhizophora mucronata and station 4 consist of Avicennia marina, Rhizophora mucronata and Rhizophora stylosa. Average sediment heavy metal concentration at each station was: 415.81 mg/kg; 561.15 mg/kg; 486.23 mg/kg and 11,507.18 mg/kg respectively. While average heavy metal concentration in mangrove water was 0.12 mg/l; 0.12 mg/l; 0.09 mg/l and 0.17 mg/l respectively. The concentration of heavy metal in mangrove water of Demak region had exceed the maximum limit allowed by the government; while the sediment concentration of heavy metal had exceed tha suitable concentration for organisms.
oai:ojs.ejournal.undip.ac.id:article/10858
2016-07-27T21:52:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/10858
2016-07-27T21:52:36Z
Waste Technology
Vol 4, No 1 (2016); 31-35
COUPLING OF MEMBRANE BIOREACTOR AND OZONATION FOR REMOVAL OF ANTIBIOTICS FROM HOSPITAL WASTEWATER
Thanh, Bui Xuan; (Scopus ID: 24068043300; H-index: 7) - Faculty of Environment and Natural Resources - Ho Chi Minh City University of Technology
Vo Thi Kim, Quyen; Ho Chi Minh City University of Food Industry
Luu Vinh, Phuc; Ho Chi Minh City University of Technology
Nguyen Thanh, Tin; Ho Chi Minh City University of Technology
Vo Thi Dieu, Hien; Ho Chi Minh City University of Technology
Cao Ngoc Dan, Thanh; Ho Chi Minh City University of Technology
Dinh, Quoc Tuc; Ho Chi Minh City University of Technology
2016-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/10858
antibiotic, membrane bioreactor, ozonation, hospital, wastewater
en
Antibiotic residues in the environment and their potential toxic effects have been considered as one of the emerging research area in the environmental field. Their continuous introduction in our environment may increase their negative impacts on human health. In this study, the eliminations of antibiotic such as Norfloxacin (NOR), Ciprofloxacin (CIP), Ofloxacin (OFL) and Sulfamethoxazole (SMZ) in wastewater of hospital were processed by membrane bioreactor (MBR) coupled with ozonation process. In particular, the MBR was applied for the antibiotic removals followed by ozonation process as a post-treatment stage to create an adequate integration to enhance removal efficiency. Achieved results after MBR treatment showed that the removal efficiency of NOR, CIP, OFL and SMZ were 90 ± 4.0% , 83 ± 13% , 81 ± 13 % and 39 ± 6%, respectivley. In addition, those antibiotic matters were continously removed by ozonation process with the removal efficiency of 87±9.0% , 83±1.0% , 81±2.3% and 66±2.3% for NOR, CIP, OFL and SMZ, respectively. In summary, antibiotics could be basically limited by the combination of MBR and ozonation before discharging in aquatic environment.
oai:ojs.ejournal.undip.ac.id:article/17085
2019-06-28T22:50:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/17085
2019-06-28T22:50:24Z
Waste Technology
Vol 7, No 1 (2019); 1-10
Clean Future: Design of an efficient and feasible water treatment plant for rural South-Bengal
Mallik, Avijit; Dept. of ME, RUET
Arefin, Md. Arman; Dept. of ME, RUET
2019-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/17085
water, waste water, Water treatment plant, source
RUET, Dept. of ME
en
Waste water treatment is an important issue because of lessening water resources. The primary reason for waste water treatment process is to expel the different constituents of the polluting load: solids, natural carbon, supplements, inorganic salts, metals, pathogens and so on. In this paper, mainly de-centralized method is considered as a solution. A new rural wastewater treatment process is introduced with proper planning and designing by using empirical equations. This paper exhibits the waste water treatment technologies present in Bangladesh, to expel contaminants from wastewater, for example, halogenated hydrocarbon mixes, overwhelming metals, colors, pesticides, and herbicides, which speak to the fundamental toxins in waste water. This research shows that the proposed decentralized system is more feasible economically and environmentally (about 75% BOD removal), since the centralized system needs modern machineries and high initial investment. To design a sustainable wastewater treatment system for developing area, further assessment on environmental, health, social and institutional aspects are recommended.
oai:ojs.ejournal.undip.ac.id:article/35922
2021-06-16T21:28:22Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/35922
2021-06-16T21:28:22Z
Waste Technology
Vol 9, No 1 (2021); 1-10
CARBON QUANTUM DOTS (CQDS) from RAMBUTAN and PANDAN LEAVES for CU2+ DETECTION
Kasmiarno, Laksmi Dewi; Universitas Pertamina
Fikarda, Andini; Universitas Pertamina
Gunawan, Reforny Kristianti; Universitas Pertamina
Isnaeni, Isnaeni; LIPI
Supandi, Supandi; UHAMKA
Sambudi, Nonni Soraya; Universiti Teknologi PETRONAS
2021-06-16 21:28:20
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/35922
Carbon Quantum dots (CQDs); leaves; hydrothermal; microwave; copper ions
UTP-UHAMKA collaborative research grant with cost center 015ME0-143
en
A facile and eco-friendly process for the synthesis of carbon quantum dots (CQDs) was carried out via hydrothermal and microwave treatment using Rambutan and Pandan leaves as carbon sources. The effects of synthesis methods on the optical and physical properties of CQDs, and the sensing activity of CQDs through Cu2+ detection are presented in this study. From the analysis, the band-gap energies of CQDs are found to be ranging from 2.52 to 3.51 eV. The CQDs solutions exhibit significant fluorescence property, in which bright cyan fluorescence can be detected under Ultraviolet (UV) light irradiation at wavelength of around 405 nm. The CQDs synthesized from Pandan and Rambutan leaves using hydrothermal method show quantum yield (QY) values at around 2.46% and 2.70%, respectively. The FT-IR analysis recorded existing functional groups on the surface of CQDs to be of hydroxyl and carbonyl groups, which can serve as adsorption sites for the detection of Cu2+. Furthermore, this study indicates that CQDs emission from Pandan and Rambutan leaves using hydrothermal method shows the best turn-off behavior when detecting the presence of Cu2+ with minimum limit of detection (LoD) as low as 123 µM.
oai:ojs.ejournal.undip.ac.id:article/43590
2022-07-21T06:28:16Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/43590
2022-07-21T06:28:16Z
Waste Technology
Vol 10, No 1 (2022); 30-42
A proposed digital control system using a mobile application for municipal solid waste management in South Africa
Adeniran, Adeleye Ayoade; Nelson Mandela University, South Africa
Shakantu, Winston; Nelson Mandela University
Ayesu- Koranteng, Emma; Nelson Mandela University
2022-04-14 08:38:08
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/43590
waste management, waste control, digital waste control, mobile application
en
The generation and handling of waste are significant challenges to developing nations like South Africa. Studies show that improper disposal of waste results in un-aesthetic, unhygienic and other health-related issues in developing nations. In addition, waste is usually generated as a result of daily activities of humans and animals; and in developing countries, the generation of waste per unit of output is much higher than that of the developed countries; and coupled with this is the challenge of effectively integrating a solid waste management system in South Africa. This paper reviewed and analysed literature to provide a theoretical framework for understanding waste and the role that digitisation could play in its management. The research shows that sustainable and digital waste monitoring can be achieved in South Africa if there is a proper plan, effective environmental policy and cooperation between the government, private sector, partners and the citizens. Moreover, if waste handling can be harnessed into a local economic development opportunity, its handlers and generators could be persuaded to manage the waste differently and properly. This would, further, create employment and revenue generation opportunities as well as a greener environment.
oai:ojs.ejournal.undip.ac.id:article/49981
2023-06-06T16:16:54Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/49981
2023-06-06T16:16:54Z
Waste Technology
Vol 11, No 1 (2023); 42-51
The Oxidation of Sulphide Compounds in the Order of Processing Sodium Hydrosulphides
https://ejournal.undip.ac.id/index.php/wastech/article/download/49981/158525
Wulansari, Isma; Chemical Polymer Engineering Department, Politeknik STMI Jakarta, Jakarta
Budi Sediawan, Wahyudi; Chemical Engineering Department, Gadjah Mada University, Yogyakarta
Hidayat, M.; Chemical Engineering Department, Gadjah Mada University, Yogyakarta
2023-05-12 05:53:52
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/49981
Sodium Hydrosulphide (NaHS); Potassium Permanganate Titration; Oxidation; Hydrogen Peroxide (H2O2)
id
Oxidation of spent sulfidic caustic consist of SH- ion or NaHS compound by H2O2 in neutral or acidic solution to elemental sulphur may provide a convenient and economical method for the control of sulphide wastes and their associated odors at pulp, paper and textile industry. The effects of total sulphide concentration, isothermal and nonisothermal process, catalyst loading, ratio of SH-/H2O2 and temperature on the kinetics of sulphide oxidation were investigated. Kinetic equations and activation energies of H2O2 and SH- ion to total sulphur and sulphate in aqueous solution for the non catalytic and catalytic oxidation reaction were calculated based on the experimental results. The rate of SSC oxidation was found higher at lower initial sulphide concentration and the rate of sulphide oxidation was found directly proportional to loading and hydrogen peroxide addition. Optimum total sulphide concentration was achieved when sulphide solutions were treated at pH 4 in the presence of H2O2 in the ratios SH-/H2O2 1:5.6. The potential user of H2O2 determine the optimal conditions for control of odor, corrosion and waste treatment cost due to SSC consisting of sulphur ion, sulphate ion, etc. The oxidation of sulphides into sulphates by H2O2 may be applied directly to aqueous wastes containing these odorants.
oai:ojs.ejournal.undip.ac.id:article/7064
2014-07-04T11:12:12Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/7064
2014-07-04T11:12:12Z
Waste Technology
Vol 2, No 1 (2014); 17-25
Enhanced biogas production from rice straw with various pretreatment : a review
Sari, Fahriya Puspita; Master Program of Chemical Engineering, Diponegoro University
Jl. Prof. Soedarto, SH, UNDIP Tembalang, Semarang
Budiyono, Budiyono; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2014-03-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/7064
Biogas, Rice straw, Pretreatment, Methane
en
Rice straw is one of organic material that can be used for sustainable production of bioenergy and biofuels such as biogas (about 50-75% CH4 and 25-50% CO2). Out of all bioconversion technologies for biogas production, anaerobic digestion (AD) is a most cost-effective bioconversion technology that has been implemented worldwide for commercial production of electricity, heat, and compressed natural gas (CNG) from organic materials. However, the utilization of rice straw for biogas production via anaerobic digestion has not been widely adopted because the complicated structure of the plant cell wall makes it resistant to microbial attack. Pretreatment of recalcitrant rice straw is essential to achieve high biogas yield in the AD process. A number of different pretreatment techniques involving using physical pretreatment (hydrothermal and freeze), chemical pretreatment (sodium carbonate – sodium sulfite, hydrogen peroxide, NMMO, alkaline, and dilute acid) and biological pretreatment (fungal pretreatment) also combined pretretment (microwave irradiation and chemical) approaches have been investigated, but there is no report that systematically compares the performance of these pretreatment methods for application on rice straw for biogas production. This paper reviews the methods that have been studied for pretreatment of rice straw for delignification, reducing sugar, and conversion to biogas. It describes the AD process, structural and compositional properties of rice straw, and various pretreatment techniques, including the pretreatment process, parameters, performance, and advantages vs. drawbacks.
oai:ojs.ejournal.undip.ac.id:article/10137
2016-07-27T21:52:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/10137
2016-07-27T21:52:36Z
Waste Technology
Vol 4, No 1 (2016); 1-6
Characterization of mannanase-producing bacteria from sago hump
Wahyuni, Sri; Department of Food Science and Technology, Faculty of Technology and Agricultural Industry, Halu Oleo University
Khaeruni R, Andi; Department of Agrotechnology, Faculty of Agriculture, Halu Oleo University
Lianto, Lianto; Department of Chemistry Education, Faculty of Teacher Training and Education, Halu Oleo University
Sidarmin, Sidarmin; Department of Chemistry Education, Faculty of Teacher Training and Education, Halu Oleo University
Holilah, Holilah; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Sepuluh Nopember
Utomo, Wahyu Prasetyo; Department of Food Science and Technology, Faculty of Technology and Agricultural Industry, Halu Oleo University
Asranudin, Asranudin; Department of Food Science and Technology, Faculty of Technology and Agricultural Industry, Halu Oleo University
2016-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/10137
en
Sago is a hardwood that can be used as source of fiber hemicellulose mannan. The abundance of mannanase waste is potential for the production of functional foods such as Manno oligosaccharides. Sago hump which is sago processing waste is very potential for growth of microorganisms because it contains lignin, cellulose, starch, minerals and vitamins that can be used as sources of carbon and energy for the growth. In this study, BLS.11-01 and BLS.11-02 isolates have been isolated and characterized from waste of sago hump. Locust bean gum was used as substrate for measuring the activity of mannanase. Both isolates had optimum temperatures at 70°C and 60°C while they remain stable at temperature range of 30°C - 90°C. Mannanase from BLS.11-01 and BLS.11-02 had optimum pH at 6 and 7, respectively, and were also stable in wide pH range of 2-8. Co2+ was a mannanase activator for both isolates. Cu2+, Zn2+, Ni2+, Ca2+ and Fe2+ were mannanase inhibitors for two isolates. Tween 20 (0.5% and 1.0%) and NaCl (0.5% and 1.0%) were chemical reagents that could enhance the activity of BLS.11-01 and BLS.11-02 mannanase isolates. While tween 80 (0.5% and 1.0%), urea (0.5% and 1.0%) and SDS (0.5% and 1.0%) were chemical reagents that were not effective for both isolates mannanase activity
oai:ojs.ejournal.undip.ac.id:article/13109
2018-01-11T21:10:08Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/13109
2018-01-11T21:10:08Z
Waste Technology
Vol 5, No 1 (2017); 21-26
MONTHLY VARIATION CHARACTERISTICS OF WAVE HEIGHT IN NORTH SULAWESI
Fadlan, Ahmad; Faculty of Fisheries and Marine Science, Diponegoro University. Jl. Prof. Soedarto, SH. UNDIP, Tembalang, Semarang, 50275, Indonesia
Indonesian Agency for Meteorology Climatology and Geophysics. Jl. Angkasa I No. 2, Kemayoran, Jakarta 10610, Indonesia
Aror, Ricky Daniel; Indonesian Agency for Meteorology Climatology and Geophysics. Jl. Angkasa I No. 2, Kemayoran, Jakarta 10610, Indonesia
Sugianto, Denny Nugroho; Departement of Oceanography, Fisheries and Marine Science Faculty, Diponegoro University. Jl. Prof. Soedarto, SH. UNDIP, Tembalang, Semarang, 50275, Indonesia.
Center for Coastal Disaster Mitigation and Rehabilitation Studies, Diponegoro University. Jl. Prof. Soedarto, SH. UNDIP, Tembalang, Semarang, 50275, Indonesia.
Zainuri, Muhammad; Faculty of Fisheries and Marine Science, Diponegoro University. Jl. Prof. Soedarto, SH. UNDIP, Tembalang, Semarang, 50275, Indonesia
2017-04-13 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/13109
Wave Height, Surface wind, Monsoon, North Sulawesi
Bitung Marine Meteorology Station
en
ABSTRACTIndonesia is a maritime country which most of the territory is ocean, where many people have activities at sea. Information about variations and characteristics of wave height in some region is very important to support safety and efficiency of the activity. The purpose of the research is to know and analysis the characteristics of the monthly variations of wave height in the water of North Sulawesi. The data used in this study is a surface wind that processed into Windwaves-05 wave model. This model calculates wave height based on energy from surface wind that blows above the sea surface. The research results showed that variations of sea waves in the waters of North Sulawesi generally are closely related to the monsoon wind patterns that occur in Indonesia. When Asian west monsoon in November to April, the average wave height in the waters of North Sulawesi is higher than wave height at Australian east monsoon in May to October. The highest average wave occurred in January with maximum wave height to 3.5 m and lowest average wave occurred in October with a maximum height to 1.25 m. Generally, the average wave height in the waters which bordering the ocean is higher than the waters close to all major islands.
oai:ojs.ejournal.undip.ac.id:article/30812
2020-12-12T11:22:53Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/30812
2020-12-12T11:22:53Z
Waste Technology
Vol 8, No 2 (2020); 30-33
DUST AND GENDER RELATED WITH LUNG VITAL CAPACITY DISSORDERS IN THE TEXTILE INDUSTRY SPINNING SECTION
Suryadi, Iwan; Universitas Sebelas Maret
Widjarnarti, Maria Paskanita; Vocational School, Universitas Sebelas Maret, Surakarta
Nugraha, Aditama Putra; Student of Occupational Health safety, Universitas Sebelas Maret, Surakarta,
Abdul Matin, Hashfi Hawali; Environmental Science, Faculty of Mathematics and Natural Science, Universitas Sebelas Maret, Surakarta
2020-11-30 18:33:22
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/30812
en
Objective: Many factors affect lung function capacity in textile industry workers. This research aims to determine the factors that affect the vital role of pulmonary spinning workers in the textile industry. Methods: This research used an analytic observational research design with a cross-sectional approach. Sampling technique used total sampling and get the sample was 96 people, and measurement of lung vital capacity used spirometry. The Low Volume Sampler was applied to measure dust concentration, and the questionnaire was used to assess the individual characteristics. Results: Bivariate analysis of the variables is the working environment dust, and gender are significant. The result of multivariate analysis of dust is the most significant to the lung vital capacity. Conclusion: dust concentrations is classified above the Threshold Limit Value (TLV), so the company should to control the source of dust exposure.Keywords: lung vital capacity
oai:ojs.ejournal.undip.ac.id:article/42864
2021-11-23T07:43:36Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/42864
2021-11-23T07:43:36Z
Waste Technology
Vol 9, No 2 (2021); 29-36
Hazardous and Toxic Waste Management Analysis at UNS Hostpital Indonesia
Hawali Abdul Matin, Hashfi; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Rio Febrian, Ardhitya; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Mar’atush Sholekha, Aini; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Kinanthi, Asih; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Ananda Rizky, Frista; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Warit Amalia, Berlian; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Miftachus Sholichah, Damayanti; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Titis Wis Dhinanti, Yhagie; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
2021-11-23 07:43:35
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/42864
en
National development is increasing every year driven by infrastructure development in all fields including hospitals. Hospitals and health care facilities produce B3 waste that enters the environment through soil, water, air, and biota media. The UNS Hospital is a hospital with service types A, B, and C located in Kartasura District, Sukoharjo Regency, Central Java, Indonesia. The method used in this study observation and interviews. The data collected is for B3 waste management which includes reduction and sorting, storage, transportation, and processing. The data obtained were than analyzed descriptively and compared with Permenkes No. 7 of 2019 regarding hospital environmental health and Government Regulation No. 22 of 2021 regarding environment management. Basically, there are 2 types of waste generated by UNS Hospital, namely medical and non-medical. Currently, UNS Hospital distinguishes waste into 2 types, namely Covid and Non-Covid. There are 6 stages of waste management in UNS Hospital, namely as follows. Sorting is carried out in each ward or treatment room by sorting waste according to its type. Waste packaging, safety box provided. The collection is by sorting the waste put into the trash and then transported by Cleaning Service in a special trolley and collected at the TPS. Storage of medical waste 1-2 days while non-medical 1 year. The transportation and processing of waste is carried out by a third party. Hazardous and toxic waste is one of the materials that requires special handling. The agency that will handle B3 waste must have permit or certification related to the management carried out. UNS Hospital is a health care agency that participates in producing B3 waste with good waste management according to existing regulations.
oai:ojs.ejournal.undip.ac.id:article/50698
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/50698
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 67-70
Shampoo Formulation Based on Banana Extract Using The Maceration Method
Broto, Winsu; Industrial Chemical Engineering Technology, Universitas Diponegoro
Arifan, Fahmi; Industrial Chemical Engineering Technology, Universitas Diponegoro
Wardani, Oktaviani Kusuma; Industrial Chemical Engineering Technology, Universitas Diponegoro
Faisal, Mirza Muhammad; Industrial Chemical Engineering Technology, Universitas Diponegoro
Nugraheni, Arwinda; Faculty of Medicine, Diponegoro University
2022-12-16 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/50698
extract, banana kepok, shampoo.
en
To maximize the utilization of natural resources in Sugihmanik Village, especially kepok bananas, a shampoo product was made from banana peel extract. Through existing literature studies, it turns out that banana peel itself contains antioxidant flavonoids which are proven to be able to protect the scalp from attacks by free radicals and UV rays which can inhibit hair growth. These flavonoids can also repair damaged hair structures and can stimulate new hair growth, so it can be said that banana peels have the potential to become raw materials for making anti-loss shampoos. Variations in this study were modifications to the addition of extracts to 3 shampoo formulation preparations, namely 20%; 30% and 40% banana peel extract which had previously been mashed and soaked for 3 days and extracted by maceration method
oai:ojs.ejournal.undip.ac.id:article/5741
2013-11-22T14:15:47Z
wastech:ed
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/5741
2013-11-22T14:15:47Z
Waste Technology
Vol 1, No 1 (2013); iv
Table of Content
editor, wastech; (Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2013-07-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/5741
en
Table of Content
oai:ojs.ejournal.undip.ac.id:article/8871
2016-05-28T21:47:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/8871
2016-05-28T21:47:24Z
Waste Technology
Vol 3, No 2 (2015); 55-57
SYNERGY OF OZONE TECHNOLOGY AND UV RAYS IN THE DRINKING WATER SUPPLY AS A BREAKTHROUGH IN PREVENTION OF DIARRHEA DISEASES IN INDONESIA
Wulansarie, Ria; State University of Semarang
Bismo, S.; Chemical Engineering Department, University of Indonesia
2015-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/8871
Disinfection; Ozone; UV Rays; Escherichia coli; Diarrhea
en
Escherichia coli bacteria which lead to contamination of drinking water in Indonesia, disinfected using ozone technology and UV rays in this research, particularly for solving the problem of water supply. The research was carried out by the variation of samples (tap water and AMDK) and presence or absence of UV rays on the research. All the results, which are related to the number of colonies of E. coli analyzed by using the method of TPC (Total Plate Count). Based on the results of the research, the number of bacteria after disinfection show a significant decline either using ozone alone, UV rays alone, or both, particularly at the time of disinfection for 3 minutes. The most optimal technology for the disinfection process is a synergy between ozone technology and UV rays, proven by the number of bacteria equal to 0 after the disinfection process for 30 minutes.
oai:ojs.ejournal.undip.ac.id:article/11385
2017-10-23T20:54:42Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/11385
2017-10-23T20:54:42Z
Waste Technology
Vol 4, No 2 (2016); 15-17
Impact Of Discharge Fertilizer Effluents On The Toxicological Profile Of Fish Harvested From A Receiving Creek In Okirika, Rivers State.
Igwe, Kalu; Department of Biochemistry, Federal University of Technology Owerri, Nigeria.
Uche, Kelechi; Department of Biochemistry, Federal University of Technology Owerri, Nigeria.
Obasi, Uchechi; Department of Biochemistry, Federal University of Technology Owerri, Nigeria.
2017-06-01 21:37:13
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/11385
Effluent, heavy metals, Polycyclic Aromatic Hydrocarbon, Total Petroleum Hydrocarbon.
en
The impact of fertilizer effluent discharge on toxicological profile of fish was studied by harvesting fish from Okrika creek which receives treated fertilizer effluent and analysing same for heavy metal (Lead Pb, Nickel Ni, Zinc Z and Copper Cu); Polycyclic Aromatic Hydrocarbon (PAH) and Total Petroleum Hydrocarbon (TPH) concentrations. Similar fish was harvested from Otamiri River which is far from any industrial activity and used as control. Heavy metals were analysed using Atomic Absorption Spectrophotometer while the PAH and TPH were analysed using Gas Chromatography. Result indicated unacceptable high values in most of the studied parameters with significantly higher (P<0.05) values; Pb (8.10±0.02 mg/kg), Ni (1.24±0.12 mg/kg), Zn (22.82±0.13 mg/kg), Cu (2.79±0.16 mg/kg), TPH (1.24±0.01 mg/kg). PAH indicated no significant difference (P>0.05) with value 0.003±0.01 mg/kg. Result indicates an unacceptable high level of these metals in the fish tissue which is of great concern to consumers and could reflect the level of pollutant in the effluent. The company is thus advised to treat their effluents properly and government ensures compliance.
oai:ojs.ejournal.undip.ac.id:article/30405
2020-06-17T23:02:56Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/30405
2020-06-17T23:02:56Z
Waste Technology
Vol 8, No 1 (2020); 1-7
The Effect of C / N Ratio and Pretreatment in Making Biogas from Tea Waste and Cow Manure in Liquid State Anaerobic Co-Digestion
Hakiki Kavisa, Ghalih
Sari, Nurlita
Hawali Abdul Matin, Hashfi; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
Budiyono, Budiyono
2020-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/30405
Biogas, pretreatment, ratio C:N, tea waste
en
Energy problems in Indonesia are issues that are not easy to solve. If the energy needs dominated by BBM continue to increase without any changes in the pattern of energy use, then Indonesia's sustainability and energy security will be disrupted. Therefore, Indonesia really needs alternative energy. Biogas is an alternative energy produced from the anaerobic degradation of organic compounds and can be a substitute for natural gas and fossil fuels. Solid tea waste can be used as a substrate from anaerobic co-digestion biogas production with cow dung. In general, the purpose of this study is to produce biogas from tea pulp and cow manure by anaerobic co-digestion and have a specific purpose, namely (i) Assessing the effect of pretreatment on the yield of biogas produced, (ii) Assessing the effect of pH on yield of biogas, (ii) Assessing the effect of the value of the C / N ratio on the yield of the biogas produced. This research was conducted by making variations in treatment including physical pretreatment with and without grinding (± 1 mm), biological pretreatment with and without addition of 5% v / v microbial consortium, pH controlled (addition of buffer) and uncontrolled, and ratio of C: N waste solid tea (25 and 30). The biogas formation process is carried out for 2 months at room temperature with the quantitative response test results in the form of biogas volume every 2 days. Biogas production in pretreatment tea grounds gives better results than without pretreatment. Optimum biogas production is obtained at a C: N 30 ratio. Comparison of C: N substrate will affect the growth of microorganisms, the microbes that play an anaerobic process need nutrients to grow and develop, in the form of carbon and nitrogen. The highest biogas accumulation produced was 73,167 ml / gr TS on variable C / N 30 ratio, NaOH pretreatment, microbial consortium and smooth size of tea waste that used.
oai:ojs.ejournal.undip.ac.id:article/28164
2022-12-16T04:46:21Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/28164
2022-12-16T04:46:21Z
Waste Technology
Vol 10, No 2 (2022); 24-27
Community Participation in Domestic Waste Management in Vim Village Abepura District Jayapura City
Ramandei, Lazarus; Cenderawasih University Jayapura Papua Province
2022-09-20 13:52:26
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/28164
Evaluation, Waste Management, Community Participation
en
Household waste production is increasing every day as the number of products and consumption patterns increases. To overcome the waste volume increase can be done by: reducing the volume of waste from the source through community empowerment. The research on community-based waste management in Vim Village Abepura District Jayapura City aims to: (1) obtain an overview of community-based waste management planning and process, (2) to inventory challenges and opportunities in domestic waste management, (3) community-based waste management. The type of this research is descriptive qualitative, that is research which intends to describe phenomenon that happened at research location. Data collection techniques include interviews, questionnaires, observations and documentation, while the data analysis uses qualitative descriptive techniques. The result of this research concludes that domestic waste management in Vim Village Jayapura City can reduce waste disposal to TPA, but not optimally implemented either in sorting and or in composting because of limited facilities and infrastructure. The composition of waste generation in Vim Village Jayapura City consists of: organic garbage 50.75%, plastic 17.14%, 19.42% paper, glass/metal 12.70%. Organic waste utilized to compost will reduce waste generation and reduce environmental burden, while sorting result not only can reduce waste generation but also can be sold or managed so as to increase revenue. Suggestions based on the results of the research can be given as follows: (1) Government needs to do more socialization about waste management. (2) Waste management is done with 3R principles (reduce, reuse, recycle).
oai:ojs.ejournal.undip.ac.id:article/57382
2023-12-12T15:23:57Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/57382
2023-12-12T15:23:57Z
Waste Technology
Vol 11, No 2 (2023); 102-111
Existing Governance Structures for Sustainable Solid Waste Management in Kisii Town, Kenya.
https://ejournal.undip.ac.id/index.php/wastech/article/download/57382/183825
Naftal, Mecheo Omonywa; University of Nairobi
Mutua, Dr. Bessy Kathambi; University of Nairobi
Moronge, Dr. James M.; University of Nairobi
2023-11-20 02:24:06
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/57382
Optimization; raw material
Not funded. Affiliated to University of Nairobi.
en
Solid waste management (SWM) is a major challenge in many urban areas in developing countries. The governance structures in the management of solid wastes are overwhelmed to sustainably manage them. This study sought to assess the governance structures for sustainable solid waste management in Kisii town. Study was anchored on the zero -waste theory and the circular economy theory. The study engaged a cross-sectional research design. The sample size was derived from the sampling formula of Yamane. Data collection methods encompassed questionnaires and interview schedules using a mobile software of KOBO for administration of questionnaires. Data from interviews was analyzed using both descriptive and inferential analysis; data from the questionnaires was coded and analyzed using softwares as KOBO, SPSS and excel. The results indicate that: there exist governance structures in SWM in Kisii town known at 45% by the residents, there are both national and county laws, policies and regulations. The most popular structures are; EMCA regulation to the residents is on-source separation at 78.3%, polluter pay principle at 20.3% and colour code separation the least 15%. Of the NEMA laws; EPR is known to the respondents at 67.1%, waste reuse and recycle 30% and waste valorization (2021) not common at 21.6%. The respondents are not aware of the existing county by-laws; only 46.7% are aware of the on-source separation policy. In conclusion, there exist governance structures; guided by the national EMCA 1999 laws, NEMA policies and regulations and Kisii county by-laws and policies. The resident’s knowledge concerning the existing laws and policies is limited. Its therefore recommended that, Public participation should be incorporated in all decisions, laws, policy and regulation. Also, public education through the media, banners, posters, public baraza and other methods be carried out to sensitize the general public SWM governance structures.
oai:ojs.ejournal.undip.ac.id:article/5736
2013-11-22T14:15:47Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/5736
2013-11-22T14:15:47Z
Waste Technology
Vol 1, No 1 (2013); 10-16
Assessment of potential greenhouse gas mitigation of available household solid waste treatment technologies
Giang, Hoang Minh; Department of Environmental Technology and Management, National University of Civil Engineering
Luong, guyen Duc; Department of Environmental Technology and Management, National University of Civil Engineering
Huong, Luong Thi Mai; Department of International Relation, Hanoi Urban Environment One Member Limited Company
2013-07-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/5736
municipal solid waste; composting; landfill; landfill gas recovery; greenhouse gas reduction
en
Current household solid waste treatment practices in most cities in Vietnam caused a great amount of direct greenhouse gas (GHG) emissions. Available solid waste treatment technologies should be seriously taken into consideration as a wedge of GHG mitigation in waste sector base on presently Vietnamese economic conditions. This study aim to evaluate the potential amount of GHG mitigation from current domestic solid waste treatment technologies in Vietnam including landfills and composting from various management scenarios. In oder to use Tier 2 model of IPCC 2006 for GHG estimation from landfills, an analysis on current household solid waste management system of the city was obtained by using material flow analysis approach. A case study in Hanoi, the capital city of Vietnam was carried out in this research. As a result, there was a reduced of over 70% of the amount of CH4 emissions and up to 53% of total GHG saving (CO2-eq) from avoiding organic waste to landfill. In addition, applying an energy recovery from LFG system to available landfills would lead to aproximately 75% of GHG saved compare to current emission of waste sector.Doi: http://dx.doi.org/10.12777/wastech.1.1.10-16Citation: Giang, H.M.,Luong, N.D., and Huong, L.T.M.2013. Assessment of potential greenhouse gas mitigation of available household solid waste treatment technologies. . Waste Technology 1(1):6-9. Doi: http://dx.doi.org/10.12777/wastech.1.1.10-16
oai:ojs.ejournal.undip.ac.id:article/8091
2020-04-12T21:55:25Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/8091
2020-04-12T21:55:25Z
Waste Technology
Vol 2, No 2 (2014); 56-62
Analysis of Crout, Lu, Cholesky Decomposition, and QR Factorization: A Case Study On The Relationship Between Abiotic (Carbon and Nitrogen) and Biotic (Macrobenthos Diversity) Factors
Widowati, Widowati; Department of Mathematics, Faculty of Sciences and Mathematics, Diponegoro University,
Semarang
2015-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/8091
LU Decomposition; Crout decomposition; QR factorization; Cholesky decomposition; Carbon; Nitrogen; Macrobenthos
en
Many real world problems can be represented by a system of linear equations, such as in the field of ecology, i.e, the relationship of carbon and nitrogen with macrobenthos diversity. There are many methods to solve linear equations system, then it is necessary to do an analysis of which method is the best so that the user can choose the most efficient method. The methods that will be analyzed are LU, Crout, Cholesky decomposition, and QR factorization. From the calculation of arithmetic operations obtained Cholesky decomposition method is the most efficient method because it has the fewest arithmetic operations. Further, to verify the proposed method we demonstrated simulation with a case study of the relationship between carbon and nitrogen with the macrobenthos diversity based on data from the area of polyculture system and PT. Kayu Lapis Indonesia coastal, Mororejo village subdistrict Kaliwungu district Kendal. From the simulation resultsis obtained that computing time the smallest is the Cholesky decomposition is equal to 1.4664 seconds, which means that the Cholesky decomposition is the most efficient method than the method of LU, Crout decomposition and QR factorization. Keywords— LU Decomposition, Crout decomposition, QR factorization, Cholesky decomposition, Carbon, Nitrogen, Macrobenthos
oai:ojs.ejournal.undip.ac.id:article/11149
2016-05-28T21:48:15Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/11149
2016-05-28T21:48:15Z
Waste Technology
Vol 3, No 2 (2015); 58-61
THE EFFECT OF F/M RATIO TO THE ANAEROBIC DECOMPOSITION OF BIOGAS PRODUCTION FROM FISH OFFAL WASTE
Hadiyarto, Agus; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Budiyono, Budiyono; (Scopus ID 55191250000) - Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Djohari, Seno; Faculty of Animal Science and Agriculture, University of Diponegoro
Hutama, Indra; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
Hasyim, Wahid; Department of Chemical Engineering, Diponegoro University Semarang, Central Java
2015-10-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/11149
fish offal; biogas; F/M ratio; CODMn
en
Biogas is a gas produced from the anaerobic decomposition of organic compounds. In the production of biogas from anaerobic digestion, value of F/M ratio shows a ratio between the mass of food available in the waste substrate with a mass of microorganisms that act as decomposers. F/M ratio is too small causing microbes could not metabolize perfectly and vice versa on the value of the ratio F / M overload resulting metabolic imbalance. The purpose of this study was to assess the effect of F/M ratio to optimal production of biogas from fish offal waste. The process of anaerobic digestion is conducted in the biodigester with four-liter volume and batch system operated at ambient temperature for 38 days. As a raw material, fish offal and microbial sludge obtained from the curing of fish and river mud discharges in the region of Bandarharjo, Semarang, Central Java. F/M ratio is set at 0.2, 0.4, and 0.6 are derived from sewage sludge VSS weight ratio of fish offal with sludge containing microbes. The addition of micronutrients supplied with a concentration of 0.4 mg/liter. Yield maximum methane gas obtained was 164,7 l/kg CODMn when the ratio F/M was 0.2. Based on the results of the study, found that the ratio F/M affect the amount of biogas produced. Meanwhile, the retention time (HRT) is only influenced by the ratio F/M.
oai:ojs.ejournal.undip.ac.id:article/17371
2019-06-28T22:50:24Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/17371
2019-06-28T22:50:24Z
Waste Technology
Vol 7, No 1 (2019); 14-18
Waste Disposal Impacts on Surface Water Quality
Kusari, Laura; University of Prishtina ''Hasan Prishtina",
2019-04-15 00:00:00
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/17371
Environment; Landfill; Surface water quality; Waste disposal
en
There are many factors that influence surface water quality and each of them needs to be thoroughly investigated. Amongst them, landfills are representing a threat to many areas of our environment and particularly in our water resources. Therefore, landfill activity needs to be addressed in order to maintain solid catchment characteristics and old quality of water resources. The focus of this research is to assess the impacts of sanitary and illegal landfills on surface water quality. In Kosovo, there are still remains of old municipality damp sites, new regional sanitary landfills as well as illegal waste disposal sites. There are also industrial waste disposal sites, agricultural waste and demolition waste, too. All those are imposing a higher stress to our environment and to our water resources. In our country, the estimated waste from municipal wastes only, reaches up to 319,034 t/year. About 42% of Kosovo population is provided with the waste collection service (The State of Waste in Kosovo, 2009). This rate is highest in the Prishtina region where it reaches up to 64%, in the 2007 year.In this paper will be presented the generated waste projection and the impacts of the landfills on the surface water quality. As the conclusion, the use of best management techniques to minimize those problems will be given.
oai:ojs.ejournal.undip.ac.id:article/39234
2021-06-16T21:28:22Z
wastech:ART
v2
https://ejournal.undip.ac.id/index.php/wastech/article/view/39234
2021-06-16T21:28:22Z
Waste Technology
Vol 9, No 1 (2021); 11-19
Effects of Comparison of Feed Composition, pH, and Preliminary Treatment of Biogas Production from Cow Blood Waste and Molasses
Budiyono, Budiyono
Muttaqin, Ichwanul
Dwi Febriatiningrum, Renyka
Hawali Abdul Matin, Hashfi; Environmental Science, Science and Mathematic Faculty, Sebelas Maret University
2021-06-16 21:28:21
url:https://ejournal.undip.ac.id/index.php/wastech/article/view/39234
Biogas, cow’s blood, pasteurization, pH
en
Energy problems in Indonesia are issues that are not easy to solve. If the energy needs dominated by BBM continue to increase without any changes in the pattern of energy use, then Indonesia's sustainability and energy security will be disrupted. Therefore, Indonesia really needs alternative energy. Biogas is an alternative energy produced from the anaerobic degradation of organic compounds and can be a substitute for natural gas and fossil fuels. Cow's blood which is a waste from slaughterhouses can be used as a substrate for anaerobic biogas production by rumen and molasses. The objectives of this study are (i) To examine the comparison of the concentration of blood and molasses added to the volume of biogas produced, (ii) To examine the effect of pasteurization on blood on the volume of biogas produced, (iii) To examine the effect of initial system pH regulation on the volume of biogas produced, (iv) Assessing the pH setting and without adjusting the pH after measuring the volume of biogas produced. This research was conducted by making variations in the composition of feeds, pH stabilization, and blood pasteurization. The process of biogas formation is carried out for 40 days at room temperature with the response of quantitative results in the form of biogas volume every 2 days. Biogas production in cow's blood gets the best results at C/N 30, using pH 8. Pretreatment of blood pasteurization and pH stabilization also shows the best biogas results.