PENGOLAHAN LIMBAH CAIR LABORATORIUM MIKROBIOLOGI INDUSTRI MENGGUNAKAN LUMPUR AKTIF AEROBIK DAN ANAEROBIK

Abstract

Industrial Microbiology Laboratory of Chemical Engineering Department of Diponegoro University periodically produces organic wastewater with 2000-6000 mg/L of COD_Mn, which is discarded without any processing. This study aims to treat wastewater in order to reduce the organic content, by using biochemical process; aerobic and anaerobic activated sludge process. The spesific purpose of this research was to determine the effect of degradation time on the reduction of COD_Mn of wastewater on aerobic and anaerobic treatment process, investigate the effect of MLSS concentration on reduction of COD_Mn on wastewater, and also find out the efficiency of COD_Mn reduction of wastewater in aerobic and anaerobic treatment processes. This research is consisted of two processes: activated sludge seeding and aerobic/anaerobic wastewater treatment. The free variables used are MLSS of 1000 mg/L and 4000 mg/L. If the wastewater of Industrial Microbiology Laboratory is treated aerobically with 4000 mg/L MLSS could reduce the COD_Mn concentrations by 56% within 7 hours, following the modeling equation of .While if it is treated anaerobicall with 4000 mg/L MLSS could reduce the COD_Mn concentrations by 90,9% within 10 days, following the modeling equation of ,with constant COD_Mn up to 34th hour. In 4000 mg/L MLSS, the COD_Mn reduction is greater than in 1000 mg/L MLSS. The aerobic activated sludge process is more suited to treat the wastewater of Industrial Microbiology Laboratory, with CODMn reduction 56% within 7 hours for 4000 mg/L MLSS.