Ammoniacal Nitrogen Removal in Semiconductor Wastewater by Sequence Batch Reactor Using Bacteria Inoculum from WormTea

Abstract

Two condition of treatment (aerobic and anaerobic) environment in SBR were applied. Three isolated bacteria from worm tea have been used in the semiconductor wastewater treatment; there are Bacillus pumilus, Micrococcus lutues and Staphylococcus warnaeri. The SBR were monitored 30 days, using synthetic semiconductor wastewater in the treatment which contained high concentration amount of NH3N, 1000mg/L. The results showed efficiencies of removal of ammoniacal nitrogen by Staphylococcus warneri is 97.2% which remained NH3N 30 mg/L, Bacillus pumilus is 60.7% and Micrococcus lutues is 79.2% respectively, and the highest microbial density of S. warneri was about 3.02 (optical density).