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Influence of hyperbaric oxygen tension on growth parameters ofCandida tropicalisandRhodococcus erythropolis

✍ Scribed by A. Kretschmer; F. Wagner

Publisher: Springer
Year: 1980
Tongue: English
Weight: 409 KB
Volume: 10
Category: Article
ISSN: 1432-0614
DOI: 10.1007/bf00504726

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✦ Synopsis

Oxygen-limited growth was avoided by means of oxygen-enriched aeration in aerobic fermentation processes. Studies were carried out with Canclida tropicalis (Cast.) Berkhout and Rhodococcus erythropolis (DSM 43 215).

The effect of hyperbaric dissolved oxygen tension on growth parameters was examined by varying the dissolved oxygen concentration and the carbon source (glucose, ethanol, and n-alkanes). Up to an oxygen concentration of 40 mg/1 in the culture suspension no impairment of the economic coefficients and no promotion of cell lysis was found. It was observed that raised oxygen concentrations in the aeration gas led to enhanced specific growth rates. At cell concentrations above 20 g/1 dry weight an uncoupling of carbon source dissimilation and biomass production was observed even at non-limiting oxygen concentrations.

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