A/A/O工艺脱氮除磷最佳运行参数的确定

Determination of Nitrogen and Phosphorus Removal of A/A/O Process for Optimum Operation Parameters

通过对COD、TN、TP和NH3-N监测分析,确定了A/A/O最佳的工艺参数为污泥负荷为0.20kg COD/(kg MLSS·d),停留时间为8h,最佳污泥浓度为3000mg/L,泥龄为15d,其脱氮除磷效果良好,COD、TP、TN、NH3-N去除率分别为89.0%、93.0%、63.1%、84.5%,其出水达到了《城镇污水处理厂污染物排放标准》(GB18918-2002)Ⅰ级标准。

The A/A/O process is at present our country is popular and run better suited to a biological activated sludge of urban sewage treatment, the main operating parameters of sludge loading, sludge concentration, sludge age, residence time, pH value of water and DO. Through the analysis of COD, TN, TP and NH3-N monitoring, to determine the process parameters of A/A/O best for optimal sludge loading is 0.20kgCOD/（ kgMLSS· d ）, the optimum 8h, optimum sludge concentration is 3000mg/L, sludge age is 15d. In the optimal parameters, the nitrogen and phosphorus removal effect is good, the removal rate of COD is 89%, the removal rate of TP is 93%, the removal rate of TN is 63.1%, the removal rate of NH3-N is 84.5%, the effluent reached the ＂urban sewage treatment plant pollutant discharge standard＂ （GB18918-2002） grade I standard.