雨水自流过滤净化技术实际工程应用效果分析

Effect Analysis of Practical Application of Rainwater Self-flow Filtration Purification Technology

我国城市径流所导致的面源污染问题严重,雨水自流过滤设施因其占地面积小、易于维护成为控制径流污染的末端处理设施之一。上海市临港新城某桥下建立雨水自流过滤净化设施示范工程,以控制进入滴水湖引清河道的水质。对该示范工程进行了处理效果监测,在长达一年半的时间里实地取样分析了六次有效降雨和两次模拟降雨数据,得到道路雨水径流经滤井处理前后的水质情况,分析结果表明:该自流过滤净化设施能够有效去除径流中的SS、石油类等污染物,去除率可达60%以上;对TN、COD_(Cr)、NH_4^+-N、TP等污染物有部分去除效果。

At present,China has faced serious problem of urban runoff non-point pollution. Due to the small construction area and easy maintenance,the rainwater self-flow filtration facilities have become one of the terminal control measures for the pollution of surface runoff. A demonstration project of rainwater self-flow filtration and purification facilities was established under a bridge in Lingang new city,Shanghai,to control the inflow water quality of Yinqing River which flows into Dishui Lake. Field monitoring was carried out of the demonstration project. Six effective rainfall data and two simulated rainfall data was obtained in a year and a half,and the runoff quality before and after the treatment facility was analyzed. The results showed that the facility can effectively remove SS and oil in the runoff,both of the removal rate can reach 60%. The facility also has some effect on the removal of TN,CODCr,NH^＋4-N,TP and other pollutants.