Reducing COD and Detergent Levels Using Activated Bentonite in Laundry Wastewater

Laundry activities can have a negative impact, caused by liquid waste from the washing process, which has the potential to cause pollution to the environment, especially receiving water bodies. So, it is necessary to treat laundry wastewater to reduce this pollution. This experiment aims to reduce detergent and COD levels in laundry waste using activated natural bentonite and determine the performance of using activated natural bentonite in reducing detergent and COD levels in laundry waste. In this research, active bentonite was used to reduce detergent and COD levels in laundry waste with a mass variation of active bentonite of 0.2; 0.4; 0.6; 1.2; and 1.4 grams. From the results of research that has been carried out, the COD content in laundry wastewater before adding bentonite was 1913.757 mg/L and the detergent content was 516.05 mg/L, so the active bentonite content COD was added resulting in an optimum reduction of 78.08%. by adding 0.8 grams of active bentonite to 50 mL of laundry waste. Meanwhile, the optimum decrease in detergent levels was 28.63% with the addition of 1.2 grams of active bentonite to 50 mL of laundry waste. From the results obtained, active bentonite can reduce COD and detergent levels effectively.