南方城市分流制排水系统中调蓄池对污水处理提质增效的影响

Influence of Storage Tanks for Quality and Efficiency Improvement of Wastewater Treatment in Separate Drainage System in City of Southern China

提升污水厂进水浓度是推进提质增效工作的重点任务。调蓄池在分流制排水系统中发挥着重要的入河污染物控制作用,与之匹配的处理标准不明确,导致出水仍送入污水厂处理,会对进厂浓度产生影响。文章选取深圳市的调蓄池作为案例,计算分析了典型降雨下调蓄池收集的污染物总量占比情况,以及雨后出水对污水厂的影响。结果表明,调蓄池在一定程度上有利于污染物的收集,但同时也会对污水厂进水浓度产生影响。针对调蓄池启用条件、出水通道等提出了建议,以期为分流制排水系统下的调蓄池建设及优化运行提供借鉴与参考。

Increasing influent concentration of wastewater treatment plant(WWTP)is the priority for improve the quality and efficiency of wastewater treatment.In separate drainage system,the storage tanks play an important role in controlling pollutants entering the river.However,the corresponding treatment and discharge standard is not clear,lead to effluent of storage tanks is still sent to the WWTP and affect the influent concentration.The typical storage tanks in Shenzhen was selected as a case study to calculate the proportion of total pollutants collected.Under the typical rainfall,the impact on influent concentration after the rain was analyzed.The results showed that the storage tanks was conducive for the collection of pollutants to a certain degree,but it also affected influent concentration of WWTP.This paper put forward proposals to the precondition of switch and the discharge channel of storage tanks,which provided reference for the construction and operations management of storage tanks in separate drainage system.