南昌市某县城雨污分流改造技术与实践

Technology and Practice of Rainwater and Sewage Diversion Reconstruction in a County of Nanchang City

随着城市规模不断增大,城市基础设施建设投入不足。雨、污水管网老旧,设计标准偏低,合流、混接区域污水溢流,部分污水直排或无序排放,致使城市污水收集率低;部分截流设施老旧,引起雨水、污水、地下水大量截流到污水处理厂,造成污水处理厂进水污染物浓度偏低、处理压力大。雨污水管网改造工程是实现污水管网全覆盖、污水全收集、收集全处理、处理全达标、全面提升污水收集处理效能的核心和关键,本文以南昌某县城雨污分流为例,探讨了城区雨污分流改造的关键技术。

With the scale of the city has continued to increase,the long-term investment in urban infrastructure construction is insufficient.The rainwater and sewage pipe network is old,and the design standard is low,sewage overflow in confluence and mixed-connection areas,partial direct or disorderly discharge of sewage,which have result in low urban sewage collection rate;some of the closure facilities are old,causing a large amount of rainwater,sewage and groundwater to be intercepted to the sewage treatment plant,resulting in low concentration of influent pollutants in the sewage treatment plant.The rainwater and sewage pipe network reconstruction project is the core and key to achieve the full coverage of the sewage pipe network,the full collection and treatment of sewage,the full treatment of sewage,and the comprehensive improvement of the efficiency of sewage collection and treatment,this paper takes a county in Nanchang as an example to discuss the key technology of urban rainwater and sewage diversion transformation.