广州绕城高速公路(九江～小塘段)桥面径流生态处理系统设计

广州绕城高速公路(九江-小塘段)跨过北江及南沙涌二级饮用水源地。为了保证在运营期所跨区域的水源不受污染,需要对桥面径流进行收集处理。人工湿地污水处理系统是一种经济高效的污水生态处理技术方式。根据桥面径流污染物特征及排放规律,提出采用储存调节池和人工湿地串连构成的生态处理方法对桥面径流进行处理,并对桥面径流处理工艺流程设计、人工湿地尺寸计算方法和植被选择等进行了详细阐述。

Research on Treatment System of Runoff Pollutions of Bridge Surface in Jiujiang to Xiaotang Section of Expressway Around Guangzhou City

Jiujiang to Xiaotang Section of Expressway around Guangzhou City passes through two second-class drinking water source protection zones,named Beijiang and Nanshayong.To avoid pollution to water body during highway operation,it is needed to collect and treat runoff sewage of bridge surface.Constructed wetland system for sewage treatment is one of the effective,economical and ecological treatment approaches.On the basis of pollution characters and discharge regularity of runoff sewage of bridge surface,integrative ecological treatment approach composed of reasonable combination of deposit adjusting tank and constructed wetland bunches are adopted to treat runoff sewage of bridge surface,treatment process of runoff sewage of bridge surface and calculating method of constructed wetlands size and plant selection are described in detail.