The Effectiveness of EM4Addition in TheBiofilter Tanks To Reduce BOD5 and COD in TheSago Industry Liquid Waste

Abstract

Abstract

Sago liquid waste is rich in BOD₅ and COD and thus need to be processed before being flown to environment. A study aims to reduce the BOD₅ and COD in that waste by using the biofilter that was added with EM4 has been conducted in April-May 2019. There were 3 treatments applied, namely the addition of 17 ml, 20 ml and 23 ml EM4 in the anaerob and aerob tanks, 3 replications.  The waste was settled for 3 days in the anaerob and 3 days in the aerob tanks. The treated waste was then tested for BOD₅, and COD concentration. The treated waste was also used for rearing Cyprinus carpio seedlings. Result shown that after being treated using the EM₄ enriched bio filter, the BOD₅ reduced into 125,5-149,8 mg/L and COD was 224,3-289,3 mg/L.The survival ofCyprinus carpioseedling reared in the treated waste was 60-80 %.The best treatment to reduce the BOD₅was the addition of 20 ml EM4and theeffectiveness was 97,08%, while that of the COD was 98,15%.It can be concluded that the addition of  EM4 to the biofilter tanks was able  to reduce the BOD₅ and COD in the  sago industrial liquid waste.

Keywords: Effecctive Microorganisms-4, Cyprinus  carpio, Anaerob tanks, Aerob tanks