Effect of oxygen supply on biomass, organic acids and vitamin B12 production by Propionibacterium shermanii
- Cite this article as:
- Quesada-Chanto, A., Schmid-Meyer, A., Schroeder, A. et al. World Journal of Microbiology and Biotechnology (1998) 14: 843. doi:10.1023/A:1008868907251
Propionibacterium shermanii CDB 10015 was able to grow at different volumetric oxygen transfer coefficients (KLa) of 10, 22, 53h−1. These results demonstrate that this bacterium, known as anaerobic, is able to grow well under aerobic conditions. The cell biomass increased from 7.9 in anaerobic conditions to 18.3g/l at KLa 53h−1, increasing also the cell yield from 0.3 to 0.7g/g. The organic acid production pattern also changed with aeration. The acetic: propionic acid ratio increased from 0.38 in anaerobiosis to 6.25 at KLa 53h−1. The vitamin B12 production decreased from 3.1mg/l in anaerobiosis to 0.5mg/l at KLa 53h−1.