Zhou Li, Li Zhengkui, Wang Yichao, Fan Nianwen. Shortcut denitrification characterization of immobilized AOB[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1219-1224.
Citation: Zhou Li, Li Zhengkui, Wang Yichao, Fan Nianwen. Shortcut denitrification characterization of immobilized AOB[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1219-1224.

Shortcut denitrification characterization of immobilized AOB

  • Received Date: 24/03/2012
    Accepted Date: 12/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • Taking pure ammonia-oxidizing bacteria of Comamonas aquatica LNL3 as the research object, the bacteria was enriched and immobilized under aerobic conditions and then domesticated under anaerobic conditions according to its ability of shortcut nitrification and nitrite denitrification. The carriers before and after immobilization were characterized by SEM to illustrate the superior affinity between microorganisms and carriers. The influences of environmental factors (temperature, pH, C/N and DO) on nitrite removal rate of Comamonas aquatica LNL3 were investigated with orthogonal design. The conclusions indicate that the impact order of environmental factors on Comamonas aquatica LNL3 in the nitrite denitrification process is temperature>pH>DO>C/N. The highest nitrite removal rate reaches 32.63 mg/(L·h) when temperature is 35℃,pH=8,C/N=3 and DO=2.5 mg/L. This study also demonstrates that Comamonas aquatica LNL3 has a characterization of aerobic denitrification and it is suitable for wastewater with low C/N ratio.
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Shortcut denitrification characterization of immobilized AOB

Fund Project:

Abstract: Taking pure ammonia-oxidizing bacteria of Comamonas aquatica LNL3 as the research object, the bacteria was enriched and immobilized under aerobic conditions and then domesticated under anaerobic conditions according to its ability of shortcut nitrification and nitrite denitrification. The carriers before and after immobilization were characterized by SEM to illustrate the superior affinity between microorganisms and carriers. The influences of environmental factors (temperature, pH, C/N and DO) on nitrite removal rate of Comamonas aquatica LNL3 were investigated with orthogonal design. The conclusions indicate that the impact order of environmental factors on Comamonas aquatica LNL3 in the nitrite denitrification process is temperature>pH>DO>C/N. The highest nitrite removal rate reaches 32.63 mg/(L·h) when temperature is 35℃,pH=8,C/N=3 and DO=2.5 mg/L. This study also demonstrates that Comamonas aquatica LNL3 has a characterization of aerobic denitrification and it is suitable for wastewater with low C/N ratio.

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