曝气缺氧/多级AO工艺用于大型污水厂提标改造

Application of Aeration Anoxia-Multi-stage AO Process in Improvement of Large Sewage Treatment Plant

南山污水处理厂位于深圳市核心区域前海片区,现状总规模为73. 6×10^4m^3/d(其中防洪应急一级处理规模为17. 6×10^4m^3/d),生化系统规模为56×10^4m^3/d,采用MUCT工艺,出水水质执行一级B排放标准。为解决现状处理工艺对总氮、总磷等处理效果较差的问题,将现状MUCT工艺改造为曝气缺氧+多级AO工艺,同时在二沉池后增设加砂高密度沉淀池。项目改造后生产运行稳定,效果良好,能耗低,出水水质全面优于《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准。

Nanshan sewage treatment plant was located in Qianhai District,the core area of Shenzhen City. The total scale of the present situation was 73. 6 × 10^4 m^3/d( of which 17. 6 × 10^4 m^3/d was the primary treatment of flood control emergency). The biological treatment process had a scale of 56 × 10^4 m^3/d. MUCT technology was adopted and the first class B effluent standard could be met. In order to solve the problem that the poor performance of the current treatment process had on total nitrogen and total phosphorus removal,the current MUCT process was transformed into the aeration anoxia + multistage AO process,and a sand-adding high-density sedimentation tank was added after the secondary sedimentation tank. After the project transformation,the operation performance was stable,the effect was good,the energy consumption was low,and the effluent quality was better than first class A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant( GB 18918-2002).