反硝化生物滤池+高效沉淀池用于污水厂改造

Application of Denitrifying Biofilter and High Efficiency Sedimentation Tank in Upgrading of a WWTP

传统污水厂处理出水水质很难达到《地表水环境质量标准》(GB 3838—2002)的准Ⅳ类标准,通常需要进行升级改造才能实现。某污水处理厂新增深度处理采用轻质反硝化生物滤池+微砂高效沉淀池工艺,处理水量为40×10^(4) m^(3)/d,处理后的出水水质由《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A排放标准提高到地表水准Ⅳ类标准,运行成本为0.355元/m^(3),建设轻质反硝化生物滤池和微砂高效沉淀池投资成本分别为274、143.5元/m^(3)。该工程投运后取得较好的处理效果,可供其他提标改造项目参考。

It is very difficult for the effluent of a traditional wastewater treatment plant to reach level quasi-Ⅳin Environmental Quality Standards for Surface Water(GB 3838-2002),thus it usually needs to be upgraded.The advanced treatment process of a newly built WWTP with a treatment capacity of 40×10^(4) m^(3)/d,adopts light denitrification biofilter and micro-sand high efficiency sedimentation tank.The effluent quality after treatment is improved from the first level A criteria in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002)to the level quasi-Ⅳin GB 3838-2002.The operating cost is 0.355 yuan/m^(3).For this upgrading project,the investment costs of constructing light denitrification biofilter and micro-sand high efficiency sedimentation tank are 274 yuan/m^(3) and 143.5 yuan/m^(3) respectively.The excellent treatment performance has been achieved after operation,which could provide references for other upgrading projects.