武汉汉西污水处理厂提标工程设计与运行

Design and Operation of Wuhan Hanxi WWTP Upgrading Project

武汉汉西污水处理厂工程规模为60×10^(4)m^(3)/d,原出水水质执行《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级B标准,尾水通过李家墩明渠排入府河,并最终汇入长江。提标工程在充分利用现有二级生物处理系统的基础上,采用絮凝-沉淀-过滤的深度处理工艺,将出水标准提升至GB 18918—2002的一级A标准。通过集约化布置深度处理构筑物,解决了用地紧张的问题。对深度处理进水接驳及改造进行精细化设计,在整个项目施工过程中,现状工程仅在深度处理进水接驳时短暂停产。采取构筑物防淹水安全措施后,仅在夏季汛期才启动尾水提升泵进行强排,其余时段整个深度处理均可实现尾水自排,极大节约了能源和运行费用。通水运行后,目前该工程实际处理规模约(63~65)×10^(4)m^(3)/d,超负荷运行6%左右,尾水各项指标优于一级A标准。

Wuhan Hanxi wastewater treatment plant(WWTP),with treatment capacity of 60×10^(4)m^(3)/d,previously should comply with the first level B criteria of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).The tail water was discharged into the Yangtze River through Lijiadun open channel and the Fu River.In order to upgrade the effluent to the first level A criteria,the advanced treatment process of flocculation,sedimentation and filtration is adopted based on full use of the existing secondary biological treatment system.The intensive layout of advanced treatment structures effectively solves the problem of land shortage.By the fine design of water inlet connection and innovation,the sewage treatment system operates normally except the inlet connection of advanced treatment process in the whole construction process of the project.The tail water of advanced treatment can realize self-draining in most time,and only has to be discharged by pump in the summer flooding season due to the safety measures taken for tail water discharge to prevent flooding,which greatly saves energy and operation cost.After operation,the actual treatment capacity of the whole plant is about(63-65)×10^(4)m^(3)/d,and the overload operation is about 6%.In addition,all the effluent indicators are superior to the first level A criteria.