大型污水处理厂改扩建工程关键节点的设计

Design of Key Nodes in Reconstruction and Extension Construction Project of Large Sewage Treatment Plant

厦门石渭头污水处理厂一期工程规模为10×104 m3/d,出水水质执行《污水综合排放标准(》GB 8978—1996)的二级标准,规划远期总规模为40×104 m3/d。本次改扩建工程包括扩建10×104 m3/d规模,并完成对一期工程的升级改造。为使改扩建工程出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级B标准,工程采用了多模式A2/O工艺,并在设计中充分考虑了与一期工程的有机衔接和合理利用。试运行结果表明,工艺设计合理,出水水质稳定达到设计标准。

Abstract： The design capacity of the first-phase project of Xiamen Shiweitou Sewage Treatment Plant was 10×10 ^4m^3/d, and the effluent quality met the second class criteria specified in the Integrated Wastewater Discharge Standard （GB 8978 - 1996）. The total long-term capacity is 40 ×10 ^4m^3/d. The reconstruction and extension construction project included the extension of 10 ×10 ^4m^3/d and the upgra- ding and reconstruction of the first-phase project. In order to meet the first level B criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （ GB 18918 - 2002 ）, the multi-mode A2/O process was adopted, and the combination and utilization of the first-phase project were fully considered. The trial operation results showed that the process was designed reasonably and the ef- fluent quality met the design standard.