Analisis Kandungan Aluminium (Al), Sulfida, Bod, Cod, Total Padatan Tersuspensi (TSS) dan pH dari Air Sungai Kapal Keruk di Desa Karang Anyer Kec. Secanggang Kab. Langkat

Abstract

Kapal Keruk,a river situated in Secanggang Distret, Langkat Regency, has been since long used as water source for the dayly consumption of the people living in surrounding areas. Recently, the people complained concerning the decrease of the river water quality due to its yellow or black colour and its unplecesant odor. They think that the decrease of the water quality is presumably caused by the sewage wasted out of a sugar mill there into the river, near the upstream area. This research is to be earrie out to test the water quality based on the scientific parameter such as aluminium, sulfide, BOD, COD, TSS, dan pH, and to determine the relationship between the existence of the sugar mill with the decrease of the river water quality Kapal Keruk river. Samping was carried out sugar mill, and water of Kapal Keruk river. Sampling was carried out according to SNI 06-2412-1991, Aluminium value determination according to SNI 06-6989.36-2005, Sulfide value determination according to SNI 19-7117.7-2005, BOD value determination according to SNI 06-2503-1991, COD value determination according to SNI 19-4234-1989, pH value determination according to SNI 06-6989.11-2004. The result from research that water of Kapal Keruk has been comtaminated before receiving effluent of sugar mill Kwala Madu

Sungai Kapal Keruk di Kec. Secanggang Kab. Langkat telah lama menjadi sumber air untuk keperluan sehari-hari masyarakat sekitar daerah aliran sungai. Akhir-akhir ini masyarakat mengeluhkan berkurangnya kualitas air karena warna kuning sampai hitam dan berbau tidak sedap. Masyarakat menduga bahwa penyebab berkurangnya kualitas air adalah akibat buangan limbah pabrik gula yang ada di sekitar sungai. Penelitian ingin menguji kualitas air itu berdasarkan parameter ilmiah yang telah diakui yakni Aluminium, Sulfida, BOD, COD, Total Padatan Tersuspensi (TSS), dan pH, dan meneliti kaitan antara keberadaan pabrik gula dengan kualitas air sungai Kapal Keruk. Pengambilan sampel dilakukan pada limbah cair pabrik gula kwala madu dan dari air sungai Kapal Keruk. Pengambilan sampel dilakukan berdasarkan SNI 06-2412-1991, penentuan nilai Aluminium berdasarkan SNI 06-6989.36-2005, penentuan nilai sulfida berdasarkan SNI 19-7117.7-2005, penentuan nilai BOD berdasarkan SNI 06-2503-1991, penentuan nilai COD berdasarkan SNI 19-4234-1989, penentuan nilai pH berdasarkan SNI 06-6989.11-2004. Dari hasil penelitian diperoleh bahwa air sungai Kapal Keruk telah tercemar sebelum menerima limbah cair Pabrik Gula Kwala Madu