A tentative idea of adding media into the aeration tank or using a two-sludge system for phosphorus and nitrogen removal is put forward to promote denitrification in aeration t.

It's a effective and valid method to cultivate and enrich denitrifying sludge,by adopting the stage by stage rising method.

Test of membrane bioreactor for denitrification and phosphorus removal;

Research progress on technique of denitrification and phosphorus removal in membrane bioreactor

The phosphorus release and uptake behavior of phosphorus accumulating organisms (PAOs) in “anoxic- anaerobic-aerobic” denitrification and phosphorus removal process (namely reversed AAO) with low carbon nutrients and high nitrate were explored using artificial wastewater and municipal wastewater.

Effect of cell concentration on the removal of nitrogen and phosphorus in synthetic wastewater by the immobilized algal-bacterial system;

The hydraulic retention time and the ratio of whole aerobic zone on removal of nitrogen and phosphorus are investigated.

The mechanisms of of the biological removal of nitrogen and phosphorus are explained.

Effect of COD concentration on phosphorus and nitrogen removal in SBMBBR;

The modified A~2/O(MAAO) process for phosphorus and nitrogen removal is improved from the traditional A~2/O technology.

The major achievements gained in the study of phosphorus and nitrogen removal by SBR were discussed as well.