A^2/O-反硝化连续砂滤池提标改造工程实例

Case of Upgrading and Reconstruction Project in A^2/O-Denitrification Continuous sand Filter

清远市某污水处理厂的一期工程,设计规模4×10~4m^3/d,原主体工艺为A^2/O氧化沟+紫外消毒,通过调研和实际进水水质分析,对该工程提出了提标改造方案,介绍了改造工艺流程和主要构筑物设计参数。提标改造后的水质指标达到广东省《水污染物排放限值》DB44/26-2001中规定的城镇二级污水处理厂第二时段一级排放标准和国家《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准中较严者。

Aiming at the first-stage project(4×10~4 m^3/d) of a sewage treatment plant in QingYuan, of which the main process for the whole project adopted before was A^2/O process plus ultraviolet disinfection, new scheme of upgrading and reconstruction was requested after the investigation and analysis from actual quality of outflow, the technological process and parameters of which were introduced in the paper. The effluent quality could meet the stricter one of the first level criteria of the Second Stage for the Secondary Sewage Treatment Plant specified in Guangdong Water Pollutant Emission Limits(DB44/26-2001) as well as the first level A standard in Discharge Standard of Pollutants for Municipal Wastewater Treatment plant(GB18918-2002).