The following contents were studyed by integrating of EGSB reactor technique and BAF reactor technique, batch experiment, molecule biology determination, theoretic argumentation and the research of model: the kinetic characteristics, mechanism and influencing factors of anaerobic ammonium oxidation, methanogenesis a.

8,aerobic and anaerobic ammonium oxidation rates increased with NH+4-N concentration in the range of 30～150 mg/L.

An expanded granular sludge bed(EGSB) reactor inoculated simultaneously with aerobic ammonium oxidation sludge and anaerobic ammonium oxidation sludge were start-up to enrich completely autotrophic nitrogen removal granular sludge.

Then the property and applied prospect of new methods such as Shortcut nitrification and denitrification, Simultaneous nitrification and denitrification, Aerobic denitrification, Anaerobic AMMonium Oxidation and Oxygen Limited Autotrophic Nitrification Denitrification are analyzed in detail.

Research progress on the microbial ecology of aerobic ammonia-oxidizing bacteria;

On the biological treatment of printing dyeing wastewater by anaerobic hydrolysis and aerobic oxidation;

In the A_1/A_2/O bio-treatment system treating alkali minimization and dyeing-printing wastewater,with the function of hydrolysis-acidification in A segments and aerobic oxidation in O segment,residual sludge could be reduced effectively by recycling of sludge to A_1 segment.

In this experiment,hydrolysis acidification-aerobic oxidation-filtration biotreatment of the wastewater from vitamin B1 production has been carried out to study the effects of pH,the temperature,dissolved oxygen,sludge load on the whole technology.