城北污水处理厂尾水人工湿地处理示范工程设计

Design of Constructed Wetland for Treatment of Tailwater from Chengbei Wastewater Treatment Plant

采用曝气生物强化氧化/三级表流湿地/二级潜流湿地/生物稳定塘复合型人工湿地工艺处理城镇污水处理厂尾水。介绍了工艺流程、工程设计参数、设备配置情况,并总结了设计特点。运行结果表明,该系统对COD、NH3-N、TN、TP的平均去除率分别达到了27.5%、42.5%、20.4%、29.4%,出水指标均达到或优于《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准。

The combined constructed wetland process of aerated biological enhanced oxidation, three-stage surface flow wetland, two-stage subsurface flow wetland and biological stabilization pond was used to treat the tailwater from municipal WWTP. The process flow, design parameters, equipment allocation and so on are introduced, and the design characteristics are summarized. The operation results show that the average removal rates of COD, NH3 -N, TN and TP are 27.5%, 42.5%, 20.4% and 29.4% respectively. The effluent indexes reach or are better than the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （ GB 18918 - 2002）.