某污水处理厂进水水质分析与扩建升级改造工艺方案  

Analysis of Influent Water Quality and Process Scheme of Expansion,Upgrading and Reconstruction Project of a WWTP

作　　者：张晶瑶 ZHANG Jingyao(Shanghai Municipal Engineering Design InstituteCo.,Ltd.,Shanghai200092,China)

机构地区：[1]上海市政工程设计研究总院<集团>有限公司,上海200092

出　　处：《净水技术》2024年第6期135-144,共10页Water Purification Technology

摘　　要：为支持地区经济、地方产业的快速发展,高质量的经济园区及工业园区在国内纷纷兴建;与此同时,部分园区内的市政污水处理厂来水中存在一定比例的工业废水,增加了出水达标的处理难度,处理工艺需根据来水水质特点进行深入研究。该项目位于苏州市吴江经济开发区,设计规模为10万m^(3)/d,服务片区内工业废水占比为20%~30%,工业废水中COD_(Cr)、TN、TP的冲击对现状污水处理有较大影响。项目根据实地踏勘的水质调研数据进行整理分析,并遵循工艺稳定、运营可靠、经济合理、节约用地的原则,选取了可强化脱氮除磷、强化去除COD_(Cr)的“Bardenpho+平流二沉池+曝气生物滤池+高效沉淀池+深床滤池+次氯酸钠消毒”工艺路线,并在进水前端设置应急沉淀池用以辅助异常来水的处理。本厂自2022年7月投产运行,近一年内出水水质良好,稳定达标。本项目设计方案可为纳管来水中工业废水占有一定比例,并受COD_(Cr)、TN、TP冲击的市政污水处理厂的设计提供借鉴。In order to support the rapid development of regional economy and local industries,high-quality economic parks and industrial parks have been built at home;meanwhile,in some parks there is a certain proportion of industrial wastewater in the influent of municipal wastewater treatment plants(WWTPs),which increases the difficulty of effluent treatment.The treatment process needs to be further studied according to the characteristics of influent water quality.This project is located in Wujiang Economic Development Zone of Suzhou City,the design scale is 100000 m^(3)/d.The industrial wastewater in the service area accounts for 20%~30%.The impact of COD_(Cr),TN and TP in industrial wastewater has a significant impact on the current wastewater treatment.This project is based on the field survey of water quality survey data collation and analysis,and the principle of process stability,reliable operation,economic rationality,and land saving is implemented.Therefore,the“Bardenpho+horizontal flow secondary sedimentation tank+biological aerated filter+high-efficiency sedimentation tank+deep-bed filter+sodium hypochlorite disinfection”process route is selected,which can strengthen nitrogen and phosphorus removal and COD_(Cr) removal,and set up an emergency sedimentation tank at the front end of the water inlet to assist the treatment of abnormal water.Since the plant was put into operation in July 2022,the effluent quality has been good and stable in the past one year.The design scheme of this project can provide reference for the design of municipal WWTPs which have a certain proportion of industrial wastewater in the piped water and are impacted by COD_(Cr),TN and TP impacts.

关 键 词：扩建升级改造工程 工业废水 水质调研 强化脱氮除磷 强化COD^(Cr)去除 

分 类 号：TU992[建筑科学—市政工程]