PKA人工湿地技术在生活污水处理中的试验研究

Experimental study on the performance of PKA constructed wetland for treating domestic sewage

采用德国引进的环境友好型新技术——PKA人工湿地,考察湿地对污水的净化效果、影响因素以及污染物的去除机制,以期了解PKA人工湿地技术在处理生活污水中的运行规律和作用机制。结果表明:(1)出水COD、BOD5、NH3-N、TP分别达到了《地表水环境质量标准》(GB 3838—2002)中Ⅳ、Ⅲ、Ⅲ、Ⅳ类标准,COD、BOD5、NH3-N、TP去除率均达到82%以上;(2)PKA人工湿地技术在处理生活污水时,投资少、建设管理方便、运行费用低,特别适用于水库上游居民分散、难建集中式污水处理厂的情况。

A new environmental friendly technology, PKA constructed wetland, was introduced from Germany for treatment of domestic sewage. Large numbers of experiments were conducted to investigate the purification performance,influencing factors and mechanism of PKA constructed wetland so as to further find out its optimum operation parameters during the domestic sewage treatment. Results showed that the effluent COD, BOD5, NH3-N, TP could meet class Ⅳ, Ⅲ, Ⅲ , Ⅳ of surface water environmental quality standard （GB 3838-2002）. The removal rates of COD,BOD5,NH3-N,TP were all above 82%. PKA constructed wetland had many advantages such as less investment,convenient construction and management, low operating cost and so on, it was suitable for treatment of domestic sewage,especially in reservoir upstream where rural inhabitants located dispersedly and difficult to build centralized wastewater treatment plant.