某Carrousel氧化沟工艺污水处理厂达标改造设计

某城市污水处理厂设计规模为2×10^4m^3/d,生化处理采用Carrousel氧化沟工艺,为使出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准,在达标改造工程中,以原Carrousel氧化沟工艺为基础,采取了增加缺氧段、设置硝化液回流、补充碳源以及增设高效沉淀池等措施,具有改造范围最小、对污水厂运行影响最小、投资节省、抗冲击负荷能力强、运行管理方便等特点。深度处理采用高效沉淀池+转盘滤池+二氧化氯消毒工艺。实际运行结果表明,出水水质完全达到了设计标准。

Reaching Standard and Renovation Project Design of a Wastewater Treatment Plant with Carrousel Oxidation Ditch Process

The design capacity of a city wastewater treatment plant was 2×10^4 m^3/d.Carrousel oxidation ditch was adopted in biological treatment process.In the reaching standard and renovation project,based on Carrousel oxidation ditch,anoxic zone and nitrifying liquid back-flow system were added,carbon source was supplemented and high efficient sedimentation tank was built.This process had advantages of small modification extent,low influence on wastewater treatment process,less investment,strong adaptability to impaction of raw wastewater and easy management.The coagulating sedimentation and rotary disc filter and chlorine dioxide disinfection process was used for the advanced treatment.The effluent quality could meet the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).