2000•China Environmental ScienceRequires access
Study on single-stage biodenitrification by immobilized cells
Cao Guo-mi
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Abstract
The single-stage biodenitrification technology of simultaneous nitrification and denitrification under aerobic conditions was studied by co-immobilized nitrifying and denitrifying bacteria. The results showed that the immobilized denitrifying bacteria enabled denitrification to occur under aerobic conditions. The co-immobilized nitrifying and denitrifying bacteria were able to nitrify and denitrify simultaneously under aerobic conditions;and their ammonia nitrogen oxidation rate was 1.4 times as fast as that of single immobilized nitrifying bacteria. The nitrogen removal rate in the single-stage biodenitrification system of co-immobilized nitrifying and denitrifying bacteria was 2.6 times as fast as that of singly immbilized nitrifying and denitrifying bacteria.