A^2/O底部鼓风曝气工艺应用于污水厂改造工程

Application of A^2/O with Bottom Blowing Aeration to Reconstruction of Wastewater Treatment Plant

针对石嘴山市第二污水处理厂原有工艺运行效果不佳、出水氮磷超标等问题,对其工艺进行改造。将原有奥贝尔氧化沟主体工艺改造成为A^2/O底部鼓风曝气工艺,改造后的污水厂处理规模仍为4×10~4m^3/d,最终出水水质达到了《城镇污水处理厂污染物排放标准》(GB18918—2002)一级B排放标准。改造工程仅增加总成本0.121元/m^3。

With regard to the problems including the poor performance of the original process, ef-fluent nitrogen and phosphorus exceeding the standards in the second wastewater treatment plant of Shi-zuishan, the plant process was renovated. The original Orbal oxidation ditch process was transformed intoA2/O with bottom blowing aeration, the treatment capacity was still 4 x 104 m3/d after renovation. The fi-nal effluent quality reached the first class level B emission standards of Discharge Standard of Pollutantsfor Municipal Wastewater Treatment Plant （GB 18918 -2002）. The total operation cost of the renovationprocess was increased only 0. 121 yuan/m3 relative to the original process.