It is found that if we can keep the enough HRT and special ratio of NO - 3N/NH 3N, the denitrification process can be finished in the aerobiosis segment of the A/O process without refluencing to anoxic segment of the A/O process.

• 发现只要保证足够的水力停留时间和进水中一定的硝态氮与氨氮比 ,利用膜法A/O工艺的好氧段完全可以满足脱氮的要求 ,而并不需要回流在A段进行反硝化作用。