悬浮填料A^2/O工艺硝化特性研究

Study on Nitrification Character of Suspended Carrier A^2/O Process

采用悬浮填料A2/O工艺处理生活污水,重点考察了悬浮污泥活性、硝化及亚硝化活性的变化及温度对NH4+-N去除效果的影响。结果表明,该工艺中悬浮污泥的活性和亚硝化活性受低温的影响较小;硝化活性受低温的影响较传统活性污泥法的小;低温对NH4+-N去除效果的影响很小,系统对NH4+-N的平均去除率为94.58%,出水NH4+-N<5mg/L,达到了《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A排放标准。

The suspended carrier A^2/O process was used to treat domestic sewage. The variation of sludge activity, nitrification activity and nitrosation activity and the effect of temperature on the removal efficiency of NH4＋ - N were investigated. The results show that the sludge activity and nitrification activity has little relation to low temperature. The effect of low temperature on nitrification activity is smaller than that in conventional activated sludge process. The removal efficiency of NH4 - N has little relation to low temperature. The average removal rate of NH4 - N is 94.58%, and the effluent NH4＋ - N concentration is less than 5 mg/L, which meets the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （ GB 18918 - 2002 ）.