Results showed that when sludge age was optimal, removal efficiency of COD, NH4(superscript +)-N, TN and TP were 93%, 99.6%, 84.58% and 99% respectively on condition that both COD and DO were optimal.

• 实验结果显示：适宜的泥龄下，在控制适宜的COD及DO的条件下，COD、氨氮、总氮和总磷的去除率分别可达93%25、99.；6%25、84