大型曝气生物滤池污水处理厂提标改造设计

Design of Upgrading and Reconstruction of Large Biological Aerated Filter in Wastewater Treatment Plant

摘要:

沈阳仙女河污水处理厂是采用曝气生物滤池工艺的大型污水处理厂，处理规模达40万m3/d。在其提标改造工程中，将现状二级曝气生物滤池改造成了带反硝化功能的三级生物滤池，并采用加砂沉淀池作为深度处理单元，使出水水质由《城镇污水处理厂污染物排放标准》（GB 18918—2002）的二级标准提高至一级A标准；同时通过建设应急处理系统，实现了不停产施工、不降低排放标准的预期目标。

Abstract:

Shenyang Xiannv River Wastewater Treatment Plant (WWTP) is a large-scale WWTP using the biological aerated filter. Its treatment scale is 400 000 m3/d. In the upgrading and reconstruction project, the existing secondary biological aerated filter is reconstructed into tertiary biological filter with denitrification function. And the settling tank with sand is used as advanced treatment unit, which makes the effluent quality is improved from the Class II standard to the Class I A standard specified in Discharge Standard of Pollutants from Municipal Wastewater Treatment Plant (GB 18918—2002). At the same time, through the construction of emergency treatment system, the expected goal of not stopping construction and not lowering emission standards has been achieved.