It is generally achieved by a traditional treatment system of combination of two processes,aerobic nitrification and anoxic denitrification,but these processes are very complex and the cost is higher.

• 进年来一些新理论不断提出,如:好氧反硝化熏厌氧氨氧化熏异养硝化等熏使得同步硝化鄄反硝化成为可能。