KOAGULASI DAN FLOKULASI LIMBAH CAIR LABORATORIUM XYZ MENGGUNAKAN KOAGULAN PAC

The educational laboratory was one of the supported in academic activities, especially practicum courses. The laboratory was used to support practicum activities and produces liquid waste from the remaining use of chemicals. In general, wastewater treatment used several methods, and the method often used in wastewater treatment was coagulation and flocculation. In this study, XYZ laboratory wastewater treatment was carried out using coagulation and flocculation methods. This method was known as the most common method used in wastewater treatment. In this study, in coagulation process PAC (Poly Aluminum Chloride) were used 100, 300, 500, 700, and 900 ppm and then followed by flocculation. After that it were tested for pH, turbidity, and COD values. The purpose of this study was to determine the effect of adding a coagulant to the XYZ laboratory wastewater and adjusting it to the quality standards of the Minister of Environment Regulation Number 5 of 2014 and Number 51 of 1995. Based on the results of the study, the pH value of the waste was 6, the optimum turbidity value was 0.45 NTU, and the COD value was 49,559 mg/L obtained at a coagulant concentration of 700 ppm.