[Objective] The study aimed to discuss the start-up and operation of A2O-MBR process in winter.[Method] Self-designed A2O-MBR process was used to treat simulated domestic sewage in winter,and its start-up and effects on nitrogen and phosphorus removal were analyzed.[Result] Under the conditions of water temperature 5-13 ℃,HRT 13 h,reflux ratio 1.5∶1.0-2.0∶ 1.0,and DO concentration 1.59-3.71 mg/L in the aerobic zone,MLSS and MLVSS could reach 6.34 and 5.08 g/L respectively on the 41 th day after the process operated.The average COD of the effluent was 13.71 mg/L during the experimental period.The average concentration of ammonia nitrogen and TN in the effluent reached 2.87 mg/L on the 9th day and 10.99 mg/L on the 24th day separately,which could meet the first-class A standard of Discharge Standard of Pollutants from Urban Sewage Treatment Plants (GB 18918-2002).However,the the removal effect on TP was not good enough,and the minimum concentration of TP in the effluent was 0.81 mg/L,which could meet the first-class B standard of Discharge Standard of Pollutants from Urban Sewage Treatment Plants (GB 18918-2002).The TP phosphorus needs to be removed by chemical treatment.[Conclusion] The research could provide scientific references for the start-up and operation of A2O-MBR process in winter.
A2O-MBRLow temperatureNitrogen and phosphorus removal
国家科技期刊平台
NSTL
维普
万方数据
