The technology of biological nitrogen removal by nitrosification denitrification(ND),which has been developing a few years,is the combination between the oxidation of ammonia and the deoxidation of nitrite.

Study on influences of pH values and C/N ratio on denitrification via nitrite;

Study of denitrification and growth characteristics of effective denitrifier community reducing nitrite

Investigation of nitritation achieved in a bio-ceramic reactor;

Under the condition that the pH value was not adjusted,the influence of operating parameters including temperature,hydraulic retention time(HRT) and dissolved oxygen(DO) on the treatment of mature landfill leachates by nitritation reactor was investigated.

Nitritation was researched experimentally in a bio-ceramic reactor.

Study on function performance of nitrous nitrification and anammox process;

Study on Denitrification Biotechnology for Nitrous Nitrification and Anaerobic Ammonia Oxidation;

In the fluidized bed reactor with embedded immobilized nitrobacteria,the normal nitrification state in artificial high ammonia wastewater can be transformed into nitrous nitrification through adjusting operational parameters.