The sago industry liquid waste is rich in BOD5, COD, ammonia and thus need to be processed before being flown to environment. A study aims to reduce the BOD5, COD, and ammonia in that waste has been conducted in January – April 2017. The sago liquid waste (315 liters) was kept in an anaerob tank (with gravel, sand and palm fiber media) for ten days. The waste was then flown to aerob tank (wit…