Abstract
This research examines the physical and chemical properties of the potential contamination of condenser cooling water (heat water) at the 2x7 MW West Sumbawa Steam Power Plant. Method’s this research is direct observation in the field. The determination of the sample point was done by purposive sampling. The results showed that the hot water had met the predetermined quality standards, namely a pH of 8.21, a temperature of 38.50C and a content of free chlorine (Cl2) of 0.03 mg / L. There was an increase in sea water temperature in a radius of 17 meters east and west by 80C from 280C to 360C. Direct discharge of hot water has the potential to pollute the marine prawn environment around the 2x7 MW West Sumbawa PLTU. From the results of the study, it was found that the temperature of the hot water had met the specified quality standard, which was 40oC, but direct disposal caused the sea water temperature to rise, exceeding the set sea water temperature quality standard of 320C and the temperature increase should not be more than 20C from the temperature. at first. The status of sea water quality due to the entry of hot water is determined using a pollution index. From the calculation results obtained PIj of 1.125 at the sample point Outfall 2, meaning that the sea water conditions at a radius of 17 meters are lightly polluted. As a form of control and prevention of pollution due to the entry of high temperature hot water, continuous monitoring is necessary and it is necessary to create a mixing pool between sea water and hot water before the heat is discharged into the sea.
Highlights
This research examines the physical and chemical properties of the potential contamination of condenser cooling water at the 2x7 MW West Sumbawa Steam Power Plant
The results showed that the hot water had met the predetermined quality standards, namely a pH of 8.21, a temperature of 38.50C and a content of free chlorine (Cl2) of 0.03 mg / L
Simanjuntak, M., 2009, Hubungan faktor lingkungan kimia, fisika terhadap distribusi plankton di perairan Belitung Timur, Bangka Belitung,Journal of Fisheries Sciences, 11(1), 31-45
Summary
Metode pengumpulan data yang dilakukan yaitu survei primer, berupa pengukuran suhu di lapangan, dan pengukuran pH dan kadar klorin bebas (Cl2) di laboratorium. Pada saat PLTU Sumbawa Barat 2x7 MW beroperasi, dilakukan pengukuran pH, suhu dan kadar klorin bebas (Cl2) pada outfall condenser untuk mengetahui kondisi aktual apakah air bahang sudah memenuhi standar baku mutu air limbah termal yang sudah ditetapkan dalam perundang-undangan. Berdasarkan Peraturan Menteri Negara Lingkungan Hidup Nomor 08 Tahun 2009 tentang Baku Mutu Air Limbah Bagi Usaha dan Atau Kegiatan Pembangkit Listrik Tenaga Termal, bahwa suhu air bahang yang diperbolehkan maksimum 400C dengan kadar klorin bebas (Cl2) sebesar 0,5 mg/L. Tahun 2004, nilai pH ini masih dalam rentang pH yang diperbolehkan untuk air laut, sehingga ketika air bahang dibuang tidak akan mencemari air laut sekitar PLTU Sumbawa Barat 2x7 MW. Selama satu bulan penelitian terjadi kenaikan suhu yang melebihi ambang batas baku mutu air bahang yang sudah ditetapkan, yaitu pada pengambilan ke- 4 dan ke- 5, nilainya lebih dari 40oC. Perbedaan kenaikan suhu diakibatkan oleh aktivitas kerja kondensor dan kondisi air laut yang digunakan untuk pendingin kondensor
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