EFEKTIVITAS PENGOLAHAN LIMBAH CAIR TAHU DENGAN TRICKLING FILTER DAN STARTER MIX

Abstract

Tofu liquid waste can pollute the environment because of its high BOD and COD values. This research was carried out by processing tofu liquid waste through a trickling filter. The use of a starter mix with the determining the effect of contact time and knowing the effectiveness of the type of sticky media in reducing the BOD and COD values of tofu liquid waste. Tofu waste water before the trickling process has a COD value of 1731 mg/L and BOD of 643 mg/L. This research used the trickling filter method, and used sticky media such as rambutan bioballs and bottle caps. The trickling filter process is carried out by soaking the sticky media with liquid tofu waste for 11 days and measuring BOD and COD on days 3, 5, 7, 9, 11. From the research results, on day 9, the media attached to bottle caps showed a decrease in BOD and COD with values of 10.1 mg/L and 23 mg/L with an efficiency of 98%. These results are accordance with East Kalimantan Regulation No.2 of 2011 concerning water quality management which sets a maximum limit of BOD of 150 mg/L and COD of 300 mg/L. Keywords : BOD, COD, tofu liquid waste, trickling filter