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Studi Kandungan Bahan Organik Pada Beberapa Muara Sungai Di Kawasan Ekosistem Mangrove, Di Wilayah Pesisir Pantai Utara Kota Semarang, Jawa Tengah

Endang Supriyantini  -  Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Indonesia
Ria Azizah Tri Nuraini  -  Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Indonesia
*Anindya Putri Fadmawati  -  Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Indonesia
Open Access Copyright (c) 2017 BULETIN OSEANOGRAFI MARINA

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Abstract

Bahan organik adalah kumpulan senyawa - senyawa organik kompleks yang telah mengalami proses dekomposisi oleh organisme pengurai, baik berupa humus hasil humifikasi maupun senyawa-senyawa anorganik hasil mineralisasi. Bahan organik merupakan sumber nutrient yang penting, yang sangat dibutuhkan oleh organisme laut. Penelitian ini bertujuan untuk menganalisis parameter kandungan bahan organik meliputi BOD5 (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), TSS (Total Suspended Solid), TDS (Total Suspended Solid) dan TOM (Total Organic Matter) dan menentukan tingkat pencemaran bahan organik berdasarkan baku mutu pada beberapa muara sungai di kawasan ekosistem mangrove, di wilayah pesisir pantai Utara Kota Semarang. Penelitian ini dilaksanakan pada bulan April 2015. Metode yang digunakan dalam penelitian ini adalah metode deskriptif, sedangkan penentuan lokasi penelitian menggunakan metode purposive sampling method dan untuk pengambilan sampel air menggunakan metode sample survey method. Hasil penelitian menunjukan bahwa kandungan parameter bahan organik selama penelitian di semua lokasi adalah BOD (3,77 – 15,13 mg/L), COD (20,33 – 140,67 mg/L), TSS (1,33 – 13,67 mg/L), TDS (818,33 – > 2.000 mg/L) dan TOM (10,73 – 50 mg/L). Secara umum kandungan COD dan TSS di Maron dan Trimulyo sudah melewati ambang batas baku mutu menurut Keputusan Menteri Negara Kependudukan dan Lingkungan Hidup Nomor 2 Tahun 1988 tentang Baku Mutu Air Limbah, sedangkan untuk kandungan BOD, TSS dan TOM belum melampaui ambang batas baku mutu yang telah ditetapkan oleh Keputusan Menteri Negara Lingkungan Hidup Nomor 51 Tahun 2004.

 

The organic material is set of complex organic compounds that have developed in decomposition process by decomposing organisms, both in the form of topsoil of humification as well as inorganic compounds of mineralization. Organic materials are an important source of nutrients, which are needed by aquatic organisms. This study aimed to analyze the organic material content BOD5 (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), TSS (Total Suspended Solid), TDS (Total Suspended Solid) and TOM (Total Organic Matter) and determine the level of pollution of organic materials based on quality standard on some estuaries of the mangrove ecosystem, in North Coast of Semarang. This study carried out in April 2015. A method used in this research is descriptive method, whereas the determination of research location used purposive sampling method and the method intake of the water sample used the sample survey method. The results showed that the content of organic material parameters during the research in all locations are BOD (3.77 to 15.13 mg/L), COD (20.33 to 140.67 mg/L), TSS (1.33 - 13, 67 mg/L), TDS (818.33 - > 2.000 mg/L) and TOM (10.73 – 50 mg/L). In general the content of COD at Maron and Trimulyo, and TDS content Mangkang Wetan, Maron and Trimulyo are already passed the quality standard according to the Decree of the Minister of State for Population and the Environment No. 2 of 1988 on Wastewater quality standard, whereas for the content of BOD, TSS and TOM has not exceeded the limit of quality standards which are established by the Decree of the Minister of State for Population and the Environment No. 51 of 2004.

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Keywords: Bahan Organik; BOD; COD; TSS; TDS; TOM; Ekosistem Mangrove

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