武汉北湖污水处理厂设计关键节点分析及组合流程的应用

Essential Analysis of Design Key Node and Application of Combined Process in Beihu Wastewater Treatment Plant in Wuhan

武汉北湖污水处理厂近期设计规模为80×10^(4)m3/d,远期将达到150×10^(4)m^3/d。本次工程按80×10^(4)m^3/d一次建成,建成后将是国内最大的一次性建成的集中式市政污水处理厂。北湖污水处理厂设计出水水质优于一级A标准,为确保后期运行安全可靠,根据技术经济分析,设计采用了双工艺技术路线:40×10^(4)m^3/d采用改良AAO+深度处理工艺,40×10^(4)m^(3)/d采用AAO+MBR工艺,其中MBR工艺预留尾水再生回用条件。结合北湖厂方案设计,重点剖析了进出水水质和污水处理工艺等关键节点的设计,可为大型污水处理厂的设计与优化提供参考。

The short-term design scale of Beihu wastewater treatment plant in Wuhan is 80 × 10^(4) m^(3)/d and will increase to 150 × 10^(4) m^(3)/d in the long term. This project is implemented in one time by80 × 10^(4) m^(3)/d,which will be the largest centralized municipal WWTP in China after completion. The designed effluent quality of Beihu wastewater treatment plant is superior to the first class A standard. Two different processes were adopted to ensure the safety and reliability of operation. According to the technical and economic analysis,the double process technical route was designed: 40 × 10^(4) m^(3)/d wastewater is treated by improved AAO + advanced treatment process,and the rest get purification via AAO + MBR process,in which the terminal water regeneration and reuse conditions were reserved for the MBR process. The design of key nodes,including the determination of design influent and effluent quality and treatment process was analyzed,which could provide reference for the design and optimization of large wastewater treatment plant.