摘要
污水处理厂出水标准的要求越来越高,探寻适应进水C/N比低且脱氮效率高、出水水质好的污水处理工艺甚为迫切。深圳市某片区需新建1座设计规模为10×10^(4)m^(3)/d、生活污水与工业废水合建(系统独立运行)的全地下污水处理厂。以生活污水处理系统为研究对象,采用“粗格栅—细格栅—曝气沉砂池—多级AO生反池—二沉池—磁混凝高效沉淀池—精密过滤器—紫外消毒”工艺,出水执行《地表水环境质量标准》(GB3838—2002)准Ⅲ类标准(COD_(Cr)、TN除外)。生反池采用多级AO和AOA可切换双工艺,绿色低碳,且满足提标要求;污泥干化热源和综合楼空调采用污水源热泵,碳排放量减少23%以上;基坑内支撑创新采用预制装配式钢桁架,建设工期节约2个月,节约成本10%。工程用地标准仅为0.25 m^(2)/(m^(3)·d^(-1)),仅为深圳市用地指标的50%。
As the effluent standards for wastewater treatment plants(WWTP)are getting higher and higher,it is urgent to explore the sewage treatment processes that are suitable for low influent C/N ratio,high denitrification efficiency and good effluent quality.A new WWTP with the design scale of 10×10^(4)m^(3)/d is required to build in an area of Shenzhen,which is a fully underground WWTP in the co-construction form of domestic sewage and industrial wastewater(operated independently).Taking the domestic sewage treatment system as the research object,the process of"coarse screen-fine screen-aerated grit tank-multi-stage AO biological reaction tank-secondary sedimentation tank-magnetic coagulation efficient sedimentation tank-precision filter-UV disinfection"is adopted,and the effluent meets the quasi-classⅢstandard of the Environmental Quality Standards for Surface Water(GB3838—2002),excluding COD_(Cr) and TN.The multi-stage AO and AOA switchable dual process is adopted for the biological reaction tank,which is green and low-carbon and meets the requirements for upgraded standards.The sewage-source heat pumps are used for the sludge drying heat sources and air conditioning in the complex building.The carbon emissions have been reduced by more than 23%.The innovative prefabricated steel trusses are used for internal support in the foundation pit,which save the construction period by 2 months and reduce the costs by 10%.The land use standard for the project is only 0.25 m^(2)/(m^(3)·d^(-1)),which is just 50%of land use indicator in Shenzhen.
作者
何磊
HE Lei(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)
出处
《城市道桥与防洪》
2025年第7期214-219,共6页
Urban Roads Bridges & Flood Control
基金
上海市科技创新行动计划项目(19230730900)。
关键词
双模式生反池
污水源热泵
预制装配式钢桁架
更严出水标准
设计案例
dual-mode biological reaction tank
sewage-source heat pump
prefabricated steel truss
higher effluent standard
design case
作者简介
何磊(1985-),男,硕士,高级工程师,从事市政给排水设计与研究工作。
