Study on the OGO Process for Simultaneous Nitrification and Denitrification;

Removal effect of organic pollutants during the course of treating landfill leachate with simultaneous nitrification and denitrification

In order to improve the efficiency of biological treatment of living sewage with rich nitrogen and phosphorus,and reduce the carbon source,the character of simultaneous nitrification and denitrification and biological phosphorus removal of Sequencing Batch Biofilm Reactor(SBBR) in treating living sewage under the condition of anaerobic /anoxic process was studied.

By comparing the traditional theory of biological nitrogen removal,the characteristic about Simultaneous Nitrification and Denitrification(SND) is raised.

Under the conditions of constant temperature and low concentration of ammonia and nitrogen,the coupling process of short-cut nitrification and simultaneous nitrification and denitrification(SND) is realized in the SBR through controlling the dissolved oxygen(DO) to be 0.

The progresses of biological nitrogen removal of waste water, such as the investigation on shortcut nitrification denitrification, simultaneous nitrification denitrification (SND), anoxic ammonium oxidation (ANAMMOX) and ecology superior nitrification denitrification (ECOSUNIDE) were analyzed and discussed.

There appear many novel technologies and new concepts such as shortcut nitrification denitrification?simultaneous nitrification denitrification and anaerobic ammonium oxidation, which develop the field of biotechnology of ammonia removal in wastewater.

Development of biological denitrification technologies were introduced and evaluated including shortcut nitrifica-ion-denitrification,simultaneous nitrification-denitrification,anaerobic ammonium oxidation(ANAMMOX) and SHARON-ANAMMOX.

With analysis in the experiments,the best work condition of simultaneous nitrification and denitrification and phosphorus removal in Carrousel 2000 oxidation ditch was determinated,when:SRT=20d,HRT=15h,DO=1.