[Study on screening methord of aerobic denitrifiers].
After domesticating activated sludge to enrich aerobic denitrifier, 105 strains were isolated from it. 25 strains with over 50% of TN removal rate were screened by measuring TN. It was proved that they can produce nitrate respiration under aerobic condition by measuring the concentration of NO2(-) -N , NO3(-) -N and N2. The denitrification process of the 24 strains is NO3(-) -N -->NO2(-) -N --> N2. Moreover, it was found that there were no obvious competition function between NO3- and NO2-. It is deduced that aerobic denitrification can help to realize shortened simultaneous nitrification and denitrification and nitration speed is more rapid via feedback effect.
Zhou
Dan-Dan
DD
Department of Environmental Engineering, Harbin Industry and Technology University, Harbin 150090, China. yatou415@sina.com
Ma
Fang
F
Wang
Hong-Yu
HY
Dong
Shuang-Shi
SS
D001420:Bacteria, Aerobic / Q000302:isolation & purification / Q000378:metabolism*; D009566:Nitrates / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid
D009566:Nitrates; D012722:Sewage; D009584:Nitrogen