The conventional activated sludge process can be transformed into advanced treatment in removing N and P by a slight change like adding agitator and blower.
经过对普通活性污泥工艺添加搅拌装置和改进曝气装置，即可达到去除氮磷的深度处理的要求。
This study investigates the removal of COD and NH3-N by aerobic granule sludge, which is nearly 70% and 90% in average respectively.
本实验考察了整个改变过程中颗粒污泥对COD以及NH_3—N的处理效果，平均去除率分别达70%和90%。
Undigested dewatered domestic sewage sludge from secondary treatment plant contained N 4.12%, of which organic form of N accounted for 93%.
未经消化的二级生活污水处理厂脱水污泥含氮4.12%，其中有机态氮占93%。
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