分散式高负荷地下渗滤污水处理系统的设计和运行

Design and operation of decentralized high hydraulic loading subsurface infiltration wastewater treatment system

以广东佛山利华员工村生活污水处理工程为例,介绍了高负荷地下渗滤污水处理系统的设计方案和运行情况。该工程污水负荷高达56 cm/d,对进出水采样监测结果表明:系统对COD、BOD5、SS、NH4+-N、色度、TN和TP的平均去除率分别为87.7%、78.9%、92.5%、87.6%、90%、52.2%和76.3%,出水的主要污染物达到了城镇污水处理厂污染物排放标准(GB 18918-2002)一级或二级标准。但总氮和总磷的去除效果还有待进一步提高。实践证明该系统投资小、运行成本低、运行稳定、管理简单,具有很好的经济和环境效益。

With the decentralized wastewater treatment facility as an example in the Lihua Village of Foshan City in Guangdong Province,the technique of high hydraulic loading subsurface infiltration wastewater treatment was demonstrated.According to the monitoring results of influent and effluent,with a hydraulic loading of as high as 56 cm/d,the average removal efficiencies of COD,BOD5,SS,NH＋4-N,chroma,TN and TP were 87.7%,78.9%,92.5%,87.6%,90%,52.2% and 76.3%,respectively.The effluent concentrations of major pollutants were lower than the first or second grade discharging limits for wastewater treatment plants of China（GB 18918-2002）.Meanwhile,efforts should be made to improve the removal of TN and TP.It was demonstrated that this technique was cost-effective for decentralized domestic sewage treatment.