Effect of oxygen supply on biomass, organic acids and vitamin B sub(12) production by Propionibacterium shermanii

Propionibacterium shermanii CDB 10015 was able to grow at different volumetric oxygen transfer coefficients (K sub(L)a) of 10, 22, 53 h super(-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...

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Published inWorld journal of microbiology & biotechnology Vol. 14; no. 6; pp. 843 - 846
Main Authors Quesada-Chanto, A, Schmid-Meyer, A C, Schroeder, A G, Carvalho-Jonas, M F, Blanco, I, Jonas, R
Format Journal Article
LanguageEnglish
Published 01.11.1998
Subjects
Propionibacterium shermanii
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Summary:Propionibacterium shermanii CDB 10015 was able to grow at different volumetric oxygen transfer coefficients (K sub(L)a) of 10, 22, 53 h super(-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 18.3 g/l at K sub(L)a 53 h super(-1), increasing also the cell yield from 0.3 to 0.7 g/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 K sub(L)a 53 h super(-1). The vitamin B sub(12) production decreased from 3.1 mg/l in anaerobiosis to 0.5 mg/l at K sub(L)a 53 h super(-1).
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ISSN:0959-3993
DOI:10.1023/A:1008868907251