张贵庄污水处理厂分段进水多级AO工艺的设计与运行

Design and Operation for the Step-feed Multi-stage AO Process in Tianjin Zhangguizhuang Wastewater Treatment Plant

天津市张贵庄污水处理厂建成于2012年,污水处理规模为20×10~4m^3/d,出水标准为一级A排放标准。设计采用了分段进水多级AO工艺,该工艺具有脱氮效率高、所需池容小、建设投资和运行费用省等特点。本工程设计为四级AO工艺,采用流量计和远控电动阀门实现对各级进水量的精确控制,池型设计采用综合管廊的布置方式。近三年的运行数据表明,在已基本满负荷运行的情况下,污水厂运行效果稳定,可为同类工程项目提供参考。

Tianjin Zhangguizhuang Wastewater Treatment Plant was built in 2012. The project treatment capacity is 20 × 10^4 m3/d. The standard of effluent in the wastewater treatment had to reach to the first level class A standard of GB 18918 - 2002. The step-feed AO process was used and it had the advantages of high nitrogen removal efficiency, the smaller requirement of tank volume, the conservation of the construction investment and operating costs, etc. In this project, some design ideas were adopted, which included the four-stage AO process, the flow meter and the remote control electric valve, and the utility tunnel of biological tank design. According to the running data in the last three years, under the condition of full load operation, the operation performance of the wastewater plant is stable, which can provide reference for similar projects.