高效沉淀池在合流制溢流污染控制中的工程应用  

Application of High‑efficiency Sedimentation Tank for Combined Sewer Overflows Pollution Control

作　　者：高玉红 孙巍 阮鹏程 祝佳佳 张碧波 朱畅 翁张帆 曾翱 GAO Yu‑hong;SUN Wei;RUAN Peng‑cheng;ZHU Jia‑jia;ZHANG Bi‑bo;ZHU Chang;WENG Zhang‑fan;ZENG Ao(Central&Southern China Municipal Engineering Design and Research Institute Co.Ltd.,Wuhan 430014,China;College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541006,China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉430014 [2]桂林理工大学环境科学与工程学院,广西桂林541006

出　　处：《中国给水排水》2024年第12期68-72,共5页China Water & Wastewater

摘　　要：为控制城市建成区雨天合流制溢流(CSOs)污染对河道水环境的冲击,黄孝河水环境综合治理项目采用25×10^(4)m^(3)的调蓄池和设计处理峰值水量6 m^(3)/s的强化处理设施(即污泥回流型高效沉淀池工艺)对明渠上游暗涵雨天CSOs污水进行储存及处理。高效沉淀池设计出水水质为SS≤20 mg/L、TP≤1 mg/L、COD≤100 mg/L,结合精密过滤池,可将SS进一步降低至10 mg/L。通过对高效沉淀池的工艺以及启动方式的优化设计,可使空池启动时间降低至12 min,同时采用污水内循环系统可减少启动过程产生的不达标出水10800 m^(3)。按照最大进水污染负荷测算,工程运行费用为0.29元/m^(3)。The process consisting of a storage tank with volume of 25×10^(4) m^(3) and an intensified treatment facility with the deigned peak flow of 6 m^(3)/s(exactly a high‑efficiency sedimentation tank with sludge reflux function)belonged to the Huangxiao River water environment comprehensive treatment project was employed to store and treat the combined sewer overflows(CSOs)from the upstream buried culvert of the open channel in rainy days,so as to control the impact of CSOs pollution on river water environment in urban built‑up area.The design effluent quality of high‑efficiency sedimentation tank was as follows:SS≤20 mg/L,TP≤1 mg/L and COD≤100 mg/L.The SS could be further reduced to 10 mg/L after treated by the precision filter tank.The optimization design of the process and the start‑up mode of the high‑efficiency sedimentation tank reduced the start‑up time of the empty tank to 12 min.In addition,the sewage internal circulation system reduced the unqualified effluent by 10800 m^(3) during the start‑up period.According to the maximum influent pollution load,the project operational cost was 0.29 yuan/m^(3).

关 键 词：合流制溢流(CSOs)污染 高效沉淀池 污泥回流 

分 类 号：TU992[建筑科学—市政工程]