Application of Bioaugmentation Technique on Papermaking Wastewater Treatment

The effectiveness of bioaugmentation in wastewater treatment was evaluated in a sequencing batch reactor(SBR) which was augmented with three fungi which could be adapted to the degradation of papermaking wastewater. The results show that wastewater treatment capacity of activated sludge increased. Compared with the control group, aeration time shortened 1 hour after the fungi put into SBR. The removal rate of COD was 76.05% which was higher 6.26% than that of antitheses in the condition of influent COD load 1352.15 mg·L-1 and aeration time 6 hours.The removal rate of COD was 68.70% in the fungi bioaugmentation reactor and that was 64.09% in antitheses group when influent load increased to 1651.64 mg·L-1. The removal rate of COD improved 7.19%.When the influent pH changed, the fungi bioaugmentation reactor had higher COD removal rate. Resist capability of change of pH and influent COD load advanced after the fungi put into SBR. It showed that wastewater treatment capability of activated sludge was strengthened after joined fungi. Bioaugmentation was applied in the pilot test. The results indicated that wastewater treatment capacity increased without sludge bulking.