Treatment of Polluted River Water Using a Combined Coagulation-Dynamic Membrane Process
A combined coagulation/ dynamic membrane process was investigated for treating polluted river water. Polyaluminum chloride (PAC) was selected as coagulant based on jar tests, and the optimal dose was 100 mg/L. Effluent turbidity was studied as the marker of a dynamic membrane formation, and the removal of chemical oxygen demand (COD), total phosphorus (TP) and total nitrogen (TN) were surveyed to evaluate the process performance. The formation time of the dynamic membrane varied depending on the different influent turbidity. The COD removal efficiency was above 65％ after 10 min operation and 70％ after 60 min operation. TP was effectively reduced to less than 0.7 mg/L after formation of a dynamic membrane. The TN removal efficiency was less than 20％, as nitrogen is not effectively removed by coagulation/filtration processes. The majority of pollutants removal was attributed to the chemical coagulation -flocculation and dynamic membrane filtration, but filamentous bacteria also play a role.
Coagulation Dynamic membrane Membrane filtration Polyaluminum chloride
Chun-Hua Xu Bao-Yu Gao Cheng-hua Liu Bai-chuan Cao
School of Environmental Science and Engineering, Shandong University Jinan, China, 250100
国际会议
上海
英文
3574-3577
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）