改良型AAO+D型滤池三级处理工艺在污水处理高排放标准下的应用

Application of Improved AAO+D Filter Tertiary Treatment Process under High Emission Standard of Sewage Treatment

泸州市城南污水处理厂工程设计总规模达15万m^(3)/d,其中,一期工程规模为5万m^(3)/d。出水执行《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A排放标准。一期采用预处理+改良型AAO+D型滤池三级处理工艺,污泥通过离心浓缩脱水一体机处理后含水率小于80%外运处置。自建成通水以来,出水指标均优于执行标准。文中对该厂的主要设计参数和运行效果介绍和分析,为同类型污水处理厂的运行管理以及在高排放标准下升级改造提供参考。

Total design scale of Luzhou South Sewage Treatment Plant project is 150000 m^(3)/d,and the scale for the first phase is50000 m^(3)/d.Effluent is subject to level 1 A discharge standard of Pollutant Discharge Standard for Urban Wastewater Treatment Plant(GB 18918—2002).Main process of the first phase project includes pretreatment and modified AAO+D filter.After being treated by integrated centrifuge,concentration and dehydration machine,the sludge should be transported for disposal with a moisture content of less than 80%.Since the plant is finished and in use of water supply,the effluent is always better than the standard.This paper introduces and analyzes the main design parameters and operation effect of the plant,which can provide reference for other sewage treatment plants in terms of the operation management and upgrading and transformation under high emission standards.