合肥市肥东污水处理厂四期工程设计分析

Design analysis of Hefei Feidong sewage treatment plant phase Ⅳ project

合肥市肥东污水处理厂四期工程近期设计规模5万m^(3)/d,设计出水水质在执行DB 34/2710—2016巢湖流域城镇污水处理厂和工业行业主要水污染排放限值的基础上,COD_(Cr)和TP两项主要指标浓度分别不高于30(40)mg/L和0.05 mg/L。通过对现状进水水质分析和相关中试结果的充分研究,提出了处理效果好、稳定性高的“改良A^(2)/O+高效沉淀池+反硝化深床滤池+高效气浮池+加氯接触消毒”处理工艺。详细介绍了该工程的工艺选择、主要构筑物参数及设计亮点。

The recent design scale of Hefei Feidong sewage treatment plant phase Ⅳ project is 50000 m^(3)/d,based on the discharge limits of major water pollutants for municipal wastewater treatment plants&industries in the Chaohu basin DB 34/2710—2016,the concentrations of COD_(Cr) and TP were no higher than 30(40)mg/L and 0.05 mg/L.Based on the analysis of the current inlet water quality and the relevant pilot test results,a treatment process of“improved A^(2)/O+high-efficiency sedimentation tank+denitrification deep-bed filter+high-efficiency air flotation tank+chlorination contact disinfection”with good treatment effect and high stability was proposed.The process selection,main structure parameters and design highlights of the renovation project are introduced in detail.