市政管网溢流污水及微污染水高标准处理探索与实践  

Exploration and Practice of Higher Standard for Overflow Wastewater Treatment in Municipal Pipelines Network and Micro-Polluted Water Treatment

作　　者：廖华丰 赵红兵 张碧波 刘向荣 简德武 张卫东 LIAO Huafeng;ZHAO Hongbing;ZHANG Bibo;LIU Xiangrong;JIAN Dewu;ZHANG Weidong(Central&Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan 430010,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430010

出　　处：《净水技术》2023年第6期176-182,191,共8页Water Purification Technology

摘　　要：随着城市发展对水环境要求的提高,部分水环境敏感地区的污水处理排放标准要求在达到一级A标准的基础上,进一步提高至《地表水环境质量标准》(GB 3838—2002)Ⅳ类甚至Ⅲ类水标准,湖北某核心水源地也在污水高标准处理方面进行了积极探索和实践。该水源地的某入库河流水质不达标,在推进源头减排措施的同时,结合该河来水量平衡分析,启动了该河水质净化工程,处理溢流污水和微污染河水,旨在进一步削减入河污染物,为入库控制断面水质达标提供最后一道屏障。工程设计规模为8万m^(3)/d,其中5万m^(3)/d为微污染河水,采用“高密度沉淀+人工快渗”作为主体处理工艺,3万m^(3)/d为市政管网溢流污水,采用“改良厌氧-缺氧-好氧+膜生物反应器(AAO+MBR)”作为主体处理工艺,出水水质COD_(Cr)、BOD_(5)、氨氮、TP浓度达到《地表水环境质量标准》(GB 3838—2002)Ⅲ类和Ⅳ类水标准。该文系统介绍了工程项目的总体方案,项目投产以来,MBR区持续稳定处理市政管网溢流污水,人工快渗区由处理微污染河水调整用于应急处理上游某污水处理厂尾水,运行效果稳定,管理方便,为高标准处理溢流污水、微污染水及水环境提升项目提供技术参考。With the improvement of the water environment requirements for urban development,the wastewater treatment and discharge standards in some water environmentally sensitive areas have been further improved to the Environmental Quality Standard for Surface Water(GB 3838-2002)classⅣor evenⅢwater standards on the basis of reaching the first class A criteria.A core water source in Hubei Province has also carried out active exploration and practice in high standard wastewater treatment.In this water source,the water quality of an inflow river is not up to standard.While promoting emission reduction measures at the source,combined with the analysis of the water balance of the river,the water purification project of this river is started to treat overflow wastewater and slightly polluted river water,which aims to further reduce the pollutants into the river and provide the last barrier for the water quality standard of the inlet control section.The design scale of the project is 80000 m^(3)/d,among which 50000 m^(3)/d is slightly polluted river water,and"high-density sedimentation+constructed rapid infiltration"is adopted as the main treatment process.The remaining 30000 m^(3)/d is overflow wastewater of municipal pipe network,and"improved anaerobic-anoxic-oxic+membrane bioreactor(AAO+MBR)"is used as the main treatment process.The concentrations of COD_(Cr),BOD_(5),ammonia nitrogen and TP in the effluent meet the standards of classⅢand classⅣwater stipulate in the Environmental Quality Standards for Surface Water(GB 3838-2002).This paper systematically introduces the overall scheme and operation effect of the project.Since the project is put into operation,the MBR area has continuously and stably treated the overflow wastewater of the municipal pipe network.The constructed rapid infiltration area is adjusted by treating the slightly polluted river water for emergency treatment of the tail water of a wastewater treatment plant(WWTP)upstream.It runs stably and manages easily.This provides technical reference for high

关 键 词：微污染水 溢流污水 AAO生物池 膜生物反应器(MBR) 人工快渗 

分 类 号：TU992.3[建筑科学—市政工程]