人工湿地在湖水净化和中水回用中的应用

Application of constructed wetlands in lake water purification and recycled water utilization

介绍了高效垂直流人工湿地处理系统在公园湖水水质净化和小区生活污水处理及回用中的应用,综合分析了系统运行后对污染物的去除效果。结果表明,人工湿地技术对富营养化水体的处理效果较好,其中对BOD5和TN的去除率高于55%,TP去除率为80%～90%,叶绿素a去除率高于63%,湿地出水水质达到了国家地表水标准中Ⅲ～Ⅳ类水体水质。该系统用于小区生活污水处理及回用时,运行稳定,出水水质可以满足绿化用水水质要求,且达到了良好的景观效果,具有良好的经济效益和应用前景。

Purification of lake water with effective vertical flow in constructed wetlands,treatment and reuse of domestic sewage were introduced.Removal efficiency for pollutants was analyzed during the system was operated.Results showed that the removal efficiencies were satisfied for the treatment of eutrophic water with constructed wetlands,the removal rates for BOD5 and TN were all over 55%,removal rate for TP was 80%～90%,removal rate for chlorophyll a was higher than 63%,which could satisfy III ～IV national water quality standards of surface water.The treatment system for domestic sewage was stable with qualified effluent water that could meet the standards of afforestation.There are some landscaping and economic benefits when the system is applied.