With significantly improved removing rates of COD phenol and NH_3-N and the activated slurry from two-stage biochemical process revamped from single-stage combined aeration tank the property of active sludge will not be changed .

改造原单级合建式 曝气 池为 两 级生化流程后，活性污泥的性能不发生变化，对COD、酚、XH3一N的去除率都有明显提高。

The two-stage bioreactor or direct inoculation of microfauna into the aeration tank can attain the goal .

应用 两 段式生物反应器或者直接向 曝气 池中投加微型动物均可达到此目的。