更严格排放标准下低温条件的某新建污水处理厂工程设计与运行  

Engineering Design and Operation of a Newly-Built WWTP under Stricter Discharge Standard at Low Temperature

作　　者：金涛 刘晓静 马文明 劳会妹 高文军 JIN Tao;LIU Xiaojing;MA Wenming;LAO Huimei;GAO Wenjun(China Construction Eco-Environmental Group Co.,Ltd.,Beijing 100037,China;China State Construction Engineering Corporation AECOM Consultants Co.,Ltd.,Lanzhou 730030,China)

机构地区：[1]中建生态环境集团有限公司,北京100037 [2]中国市政工程西北设计研究院有限公司,甘肃兰州730030

出　　处：《净水技术》2023年第9期168-175,共8页Water Purification Technology

基　　金：中建股份科技研发课题(CSCEC-2021-Z-52)。

摘　　要：污水处理厂冬季低温运行期间主体生化处理工艺中活性污泥的硝化速率、反硝化速率、生物除磷效率显著下降,常常遇到氨氮、TN、TP难以稳定达标的问题。河北省某污水处理厂扩容提标改造设计总规模为5.0万m^(3)/d,其中新建部分设计规模为3.0万m^(3)/d,设计出水水质执行北京市《城镇污水处理厂水污染物排放标准》(DB 11/890—2012)中的A标准。该污水处理厂面临进水水温低、碳源利用率低、排放标准高等难题。新建部分采用“多段多级AO+二沉池+高效沉淀池+V型滤池+臭氧接触池+接触消毒池”组合工艺,工程建成投入使用后,各出水指标稳定达标。其中,出水COD_(Cr)、TN、TP质量浓度分别为(13.8±2.6)、(7.1±1.2)、(0.10±0.05)mg/L,直接运行成本为1.36元/m^(3)。该组合工艺在低温条件下具有工艺成熟稳定、运行操作简单、出水效果好等优势,特别适用于高排放标准污水处理厂的建设和运行。文中介绍了该污水处理厂的设计概况、工艺流程及特点、主要设计参数,分析了其运行效果、经济指标,可为类似高排放标准污水处理厂设计提供一定参考。During low temperature in winter,the nitrification rate,denitrification rate and biological phosphorus removal efficiency of activated sludge in the main biochemical process of wastewater treatment plant(WWTP)decrease significantly.And it is often encountered that ammonia nitrogen,TN and TP are difficult to reach the discharge standard stably.The total design scale of WWTP which needed to raise the discharge standard and treatment scale in Hebei province is 5.0×104 m^(3)/d,including the new part is 3.0×104 m^(3)/d.Design effluent water quality is required to upgrade to A standard in the Discharge Standard of Water Pollutants for Municipal Wastewater Treatment Plant in Beijing(DB 11/890—2012).The WWTP is faced with problems such as low inlet water temperature,low utilization rate of carbon source and high discharge standard.A combined process of"multi-step&multi-stage AO+secondary sedimentation tank+high efficiency sedimentation tank+V filter+ozone contact tank+disinfection tank"is selected in the new part.After the project is completed and put into use,the effluent quality is stable and up to standard.The average COD_(Cr),TN,TP in effluent mass concentration were(13.8±2.6),(7.1±1.2),(0.1±0.05)mg/L respectively.The direct operational cost is 1.36 yuan/m^(3).The combined process has the advantages of technology maturity and stability,simple operation and good effluent effect at low temperature,especially suitable for the construction and operation of high standard WWTP.The general situation of WWTP design,process and its characteristics,main design parameters are introduced,the operation effect and economic indicators are also analyzed,which provides certain reference for the design of similar high discharge standard WWTP.

关 键 词：低温 扩容提标改造 更严格排放标准 多段多级 AO 百乐克工艺 脱氮除磷 臭氧氧化 

分 类 号：TU992[建筑科学—市政工程]