Influence of several parameters on the growth of Candida ingens in controlled batch culture using volatile fatty acids as substrates

The culture of Candida ingens on volatile fatty acid mixtures, C 2C 6, showed a diauxy phenomenon, straight-chain acids being consumed before branched-chain acids. This diauxy was interpreted as a catabolic repression of the enzymes degrading branched-chain acids. The appearance of propionic acid i...

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Bibliographic Details
Published in:Biological wastes 1989, Vol.30 (1), p.21-34
Main Authors: Anciaux, C.M., De Meyer, M., Levert, J.M., Vanthournhout, M.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biology of microorganisms of confirmed or potential industrial interest
Biotechnology
Fundamental and applied biological sciences. Psychology
Mission oriented research
Physiology and metabolism
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Summary:The culture of Candida ingens on volatile fatty acid mixtures, C 2C 6, showed a diauxy phenomenon, straight-chain acids being consumed before branched-chain acids. This diauxy was interpreted as a catabolic repression of the enzymes degrading branched-chain acids. The appearance of propionic acid in the substrate in the first part of the growth was due to valeric acid β-oxidation. The μ vs S curves showed a growth inhibition by the substrate, and a Monod-type kinetics accounted for the dissolved oxygen influence. The best growth rates and yields obtained were, respectively, 8 per day and 0·60 g dry biomatter/g substrate consumed.
ISSN:0269-7483
DOI:10.1016/0269-7483(89)90140-7