Abstract
Aeration was found to affect the biological denitrification byOchrobactrum anthropi SY509. Although cell growth was vigorous under 1 vvm of aeration and an agitation speed of 400 rpm in a 3-L jar fermentor, almost no nitrate was removed. Yet under low agitation speeds (100, 200, and 300 rpm), denitrification occurred when the dissolved oxygen was exhausted shortly after the inoculation of the microorganism.Ochrobactrum anthropi SY509 was found to express highly active denitrifying enzymes under anaerobic conditions. The microorganism also synthesized denitrifying enzymes under aerobic conditions (1 vvm and 400 rpm), yet their activity was only 60% of the maximum level under anaerobic conditions and the nitrate removal efficiency was merely 15%. However, although the activities of the denitrifying enzymes were inhibited in the presence of oxygen, they were fully recovered when the conditions were switched to anaerobic conditions.
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Song, S.H., Yeom, S.H., Choi, S.S. et al. Effect of aeration on denitrification byOchrobactrum anthropi SY509. Biotechnol. Bioprocess Eng. 7, 352–356 (2002). https://doi.org/10.1007/BF02933520
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DOI: https://doi.org/10.1007/BF02933520