多介质人工湿地提升再生水水质的工程实例

Upgrading Technology Project Case of Reclaimed Water Quality by Multimedia Constructed Wetland

针对部分再生水厂尾水水质难以达到景观用水回用要求的问题,以北京市某多介质人工湿地处理再生水厂尾水工程为例,对该工程工艺参数、设计特点和处理效果进行了评价和分析。结果表明,多介质人工湿地不仅成本低廉,运行稳定,还可以有效对低C/N值的微污染再生水进行处理,出水关键指标均达到《地表水环境质量标准》(GB 3838—2002)中Ⅲ类标准,适宜作为景观用水直接回用。

To address the problem that the effluent from some reclaimed water plants was hard to meet the reuse requirement for scenic environment use, the effluent was treated using a multimedia constructed wetland in Beijing. The process parameters, design features and treatment effect were evaluated and analyzed. The results indicated that besides the low cost and stable operation, the multimedia constructed wetland could also be used for effective treatment of micro-polluted reclaimed water with low earbort/nitrogen ratio. The key pollutant indexes of effluent could meet the class III criteria specified in the Environmental Quality Standards for Surface Water （ GB 3838 - 2002）. The effluent was suitable to be reused as scenic water.