A^2O氧化沟-混凝沉淀-反硝化深床滤池工艺在大型经开区污水处理中的应用

Application of A^2O oxidation ditch-coagulation sedimentation-deep bed denitrification filter process in treatment of wastewater from large economic-technological development area

为降低污水排放对巢湖的污染,采用A^2O氧化沟-混凝沉淀-反硝化深床滤池组合工艺处理某大型经开区污水。分析了污水水质特征,论述了处理工艺的选择过程,介绍了工程设计参数和工程设计特点,以及实际运行情况。工程运行结果表明,该工艺出水水质稳定,可达到GB 18918—2002《城镇污水处理厂污染物排放标准》中一级A标准,其中TP、TN、NH3-N、CODCr的质量浓度分别不超过0.3、5、1.5和30 mg/L。

In order to reduce the influence of wastewater towards Chaohu Lake, A2O oxidation ditch-coagu- lation sedimentation-deep bed denitrification filter combined process was adopted to treat wastewater discharged from a large economic-technological development area. The characteristics of the said kind of wastewater were analyzed; besides, the selection procedure of the combined process was elaborated with the parameters and char- acteristics of the project design introduced at the same time. The running results of the project showed that, the quality of the effluent water from the said process was stable, which met the specification of A level grade one in GB 18918--2002 Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant, and the mass con- centrations of TP, TN, NH3-N, CODcr were not above 0.3, 5, 1.5, and 30 mg/L respectively.