Analisa Kebutuhan Oksigen Secara Kimiawi Limbah Cair Pabrik Gula Rafinasi di Kawasan Industri Medan

Abstract

Chemical oxygen demand (COD) is the amount of oxygen required to oxidize organic substances present in 1 liter of water samples, in which the oxidizing agent K2Cr2O7 is used as a source of oxygen. Analysis COD based on most of all organic material can be oxidised to become carbondioksida and water, the constructively K2Cr2O7 in acid solution. From analysis, COD concentrate at wastewater of Refined Sugar Industry Medan Wastewater at first week : Inlet 17.956,80 mg/L, outlet : 5.036,16 mg/L, second week : Inlet 24.148,80mg/L, outlet : 7.925,76 mg/L, third week : Inlet 25.180,80 mg/L, outlet : 8.256,00 mg/L, fourth week : Inlet 19.608,00 mg/ L, and oulet : 6.357,12 mg/ L.