Study on the enhanced bio-denitrification in a full-scale WWTP with MSBR process

According to the situation that the N and P indexes in the MSBR process of municipal wastewater treatment plant can't meet the I-A wastewater discharge standards of China, the optimized operation parameters were put forward, including improving the sludge within the reflux ratio, opening the return ratio, increasing SBR hypoxia anoxic mixing time, controlling of dissolved oxygen in the aerobic tank,and so on. Through industrial experimentation, the effects of enhanced bio-denitrification were also discussed. The experiment results show that the wastewater treatment plant with 7-tank process of MSBR will meet the I-A wastewater discharge standards of China of the N concentration in effluent through enhanced bio-denitrificaion, but it have bad impact on the TP removal, then through chemical dephosphorization in advanced treatment the effluent water quality will satisfy the I-A wastewater discharge standards of China entirely.