DO对短程同步硝化反硝化除磷工艺的影响

针对碳源偏低的城市污水，采用序批式活性污泥法研究D0对短程同步硝化反硝化除磷工艺的影响，同时对短程同步硝化反硝化和反硝化除磷的机理进行探讨。试验表明：控制DO浓度可在同一个反应器内既实现短程同步硝化反硝化反应又达到反硝化除磷的效果。综合考虑COD、NHg—N、TN、TP的出水浓度达到一级A排放标准，得出最佳的D0控制范围。当D0浓度在0．5～1．0mg／LU时．COD的去除率达到93％～94％，Nil,＋一N的去除率为97％～98％，TN的去除率达到85％一96％，TP的去除率为91％～93％。

Effect of DO on Shortened Simultaneous Nitrification and Denitrifying Phosphorus Removal

For low carbon urban sewage, the study was made on the effect of DO on shortened simultaneous nitrification and denitrifying phosphorus removal in sequencing batch reactor activated sludge process, and investigated mechanism of shortened simultaneous nitrification and denitrifying phosphorus removal. The test shows that controlling DO concentration can achieve the effect of shortened simultaneous nitrification and denitrifying and denitrifying phosphorus removal. Considering the effluent concentration of COD ,NH4＋-N,TN,TP to reach the first class of A emissions standard, it receives the best DO controlling rang. When DO concentration within 0.5-1.0 mg/L, the removal rates of COD, NH^4＋- N, TN and TP can arrive at 93%~94%, 97%-98%, 85%~96% and 91%~93%.