Analysis and Suitability Evaluation of Reclaimed Water Supply-type River and Lake Water Purification Technology

Following the large-scale construction of artificial lakes,rivers and park landscape ponds using reclaimed water,the problems of reclaimed water are increasingly evident,and it is necessary to find a suitable technology for ensuring reclaimed water quality. Based on the investigation,research and analysis of construction and running effect of the water quality improvement projects in Beijing,it was pointed that the single and combined techniques such as hydraulic circulating,recirculation filtration,biomanipulation,constructed wetland and chemical phosphorus removal can be considered as the main approaches for improvement and purification of water quality of rivers and lakes using reclaimed water. In the areas with better economic conditions and higher water quality standard,the biochemical-physicochemical methods such as membrane bioreactor( MBR),the biological activated carbon filter( BAC)and other effective combined technologies can be supplemented.