Operational Characteristics of a Full-scale Submerged Membrane Bioreactor Treating Domestic Sewage
A full-scale submerged membrane bioreactor (MBR) with capacity of 1200 m3/d is operated to treat domestic wastewater,and the effluent is used for irrigating and toilet-flushing in Tsinghua Universitys campus.The wastewater treatment plant is composed of a grating,a hydraulic screen,a regulating tank,a hair gathering device,and a submerged membrane bioreactor.The efficiency and process stability of the plant were evaluated over 10-month-operation.It was found that the effluent quality is good.In spite of the fluctuation of the water temperature and the hydraulic loading,the MBR was able to achieve more than 80% in COD removal,more than 90% in BOD removal and more than 95% in NH3-N removal.As the result,the effluent presented mean values of 10.5 mg/L of COD,3.0 mg/L of BOD5,0.2 mg/L of NH4+-N,1.0 mg/L of SS,and lower than 0.2 NTU of turbidity,which meets the national Water Quality Standard for Urban Miscellaneous Water Consumption (GB/T 18920-2002).But the removal efficiency of total nitrogen and total phosphorus should be improved by certain measures.Because of the suitable operation,membrane fouling developed slowly,and the membrane didnt need to wash frequently,although the MLSS of the MBR reached nearly 15 g/L.The operational cost of the plant was 0.71 RMB Yuan/m3.
MBR Operation Domestic wastewater Water reuse
Y.ZHANG L.D.XU D.B.WANG X.B.ZHU M.C.ZHAO Q.Y.LV L.J.CHEN
Department of Environmental Science and Engineering,Tsinghua University,Beijing 100084,P.R.China Management Center of Campus Repairs,Tsinghua University,Beijing 100084,P.R.China
国际会议
The 2nd China-Japan Graduate Student Forum -- Life, Environment and Energy (第二届中日研究生论坛--生命,环境与能源)
北京
英文
228-234
2009-09-24（万方平台首次上网日期，不代表论文的发表时间）