ALFARISI, EDRA NAUFAL (2022) ANALISIS KANDUNGAN BAHAN ORGANIK PADA KOLOM AIR DI PERAIRAN KAWASAN BANJIR KANAL TIMUR, SEMARANG, JAWA TENGAH (23dik126). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Edra Naufal Alfarisi. 26040117140073. Analisis Kandungan Bahan
Organik pada kolom air di Perairan Kawasan Banjir Kanal Timur Semarang, Jawa Tengah. Ria Azizah Tri Nuraini dan Chrisna Adi Suryono)
Peningkatan jumlah penduduk dan aktivitas penduduk yang tinggi di sekitar
daerah perairan sungai Banjir Kanal Timur Semarang Jawa Tengah dapat
menimbulkan limbah limbah yang menjadi penyebab tercemarnya suatu perairan
dengan bahan organik. Perairan pantai Semarang terdiri dari sungai Banjir Kanal
Timur, muara sungai Banjir Kanal Timur dan kawasan sungai Banjir Kanal Timur
menjadi tempat tempat penampungan limbah yang diduga mengandung bahan
organik yang tinggi. Penelitian yang dilakukan bertujuan untuk mengetahui
kandungan bahan organik pada kolom air di perairan sungai Banjir Kanal Timur
Semarang serta mengetahui tingkat pencemaran yang terjadi di kolom air.
Penelitian ini dilakukan pada bulan Mei 2022 . Pengukuran bahan organik pada air
dilakukan dengan melihat kandungan TOM (Total Organic Matter), serta parameter
pendukung lainnya yaitu TSS (Total Suspended Solid), TDS (Total Dissolved
Solid), BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand),
Nitrat, Nitrit, Fosfat dan Ammonia. Hasil pengukuran TOM pada air menunjukkan
nilai sebesar 9,8 – 32, 65 mg/L, kandungan TSS sebesar 118 – 412 mg/L,
kandungan TDS sebesar 4.150 – 34.300 mg/L , kandungan BOD sebesar 180,83 –
370,97 mg/L, kandungan COD sebesar 583,33 – 1.196,67 mg/L, kandungan nitrat
sebesar 0,562 – 1,099 mg/L, kandungan Nitrit sebesar 0,085 – 0,634 mg/L,
kandungan Ammonia sebesar 0,155 – 0,349 mg/L, dan kandungan fosfat yang
diperoleh yaitu <0,018 mg/L. Kandungan bahan organik pada perairan sungai
Banjir Kanal Timur Semarang pada air Sebagian besar telah melebihi baku mutu
yang ditetapkan Peraturan Menteri Kesehatan No 492/Menkes/Per/IV/2010,
Keputusan Menteri Negara Kependudukan dan Lingkungan Hidup Nomor 2 Tahun
1988 Tentang Baku Mutu Air Limbah dan Keputusan Menteri Negara Lingkungan
Hidup Nomor 51 Tahun 2004 Tentang Baku Mutu Air Laut untuk Biota Laut.
Kualitas bahan organik air yang telah melewati baku mutu perairan menunjukkan
bahwa perairan sungai Banjir Kanal Timur Semarang, Jawa Tengah telah tercemar
bahan organik.
Kata kunci: Bahan Organik, TOM, TDS, TSS, BOD, COD, Nitrat, Fosfat, Kolom
Air , Banjir Kanal Timur, Semarang

ABSTRACT
(Edra Naufal Alfarisi. 26040117140073. Analysis of Organic Material
Content in Water Column at Banjir Kanal Timur Area , Semarang, Central Java.
Ria Azizah Tri Nuraini and Chrisna Adi Suryono)
The increase in population and high population activity around the Banjir
Kanal Timur waters area, Semarang, Central Java, can cause waste to be polluted
with organic matter. The coastal waters of Semarang consist of the East Flood
Canal, the river estuary and Banjir Kanal Timur river as a place to store waste
which is thought to contain high organic matter. This research aims to determine
the content of organic matter in the water column and sediment in the waters of
Banjir Kanal Timur Semarang and to determine the level of pollution that occurs
in the water column and sediment. This research was conducted from May 2022.
Measurement of organic matter in water was carried out by looking at the content
of TOM (Total Organic Matter), as well as other supporting parameters, namely
TSS (Total Suspended Solid), TDS (Total Dissolved Solid), BOD (Biochemical
Oxygen). Demand), COD (Chemical Oxygen Demand), Nitrate, Nitrite, Ammonia
and Phosphate, while the measurement of organic matter in sediments is done by
knowing the total organic matter using the LOI (Loss on Ignition) method. The
TOM measurement results in water show a value of 9,8 – 32, 65 mg/L, TSS content
of 118 – 412 mg/L, TDS content of 4.150 – 34,300 mg/L, BOD content of 180,83 –
370,97 mg/L, COD content of 583,33 – 1.196,67 mg/L, nitrate content of 0,562 –
1,099 mg/L, Nitrite content 0,085 – 0,634 mg/L, Ammonia content 0,155 – 0,349
mg/L, and phosphate content obtained <0.018mg/L. The content of organic matter
in the waters of Banjir Kanal Timur river Semarang both in water has exceeded the
quality standards stipulated by the Minister of Health Regulation No.
492/Menkes/Per/IV/2010, Decree of the State Minister of Population and
Environment No. 2 of 1988 concerning Wastewater Quality Standards and Decree
of the State Minister of the Environment Number 51 of 2004 concerning Seawater
Quality Standards for Marine Biota. The quality of water organic matter and
sediment that has passed the water quality standard indicates that the waters of
Banjir Kanal Timur Semarang, Central Java have been contaminated with organic
matter.
Keywords: Organic Material, TOM, TDS, TSS, BOD, COD, Nitrate, Phosphate,
Water Column, Banjir Kanal Timur, Semarang

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