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The effects of pCO2on yeast growth and metabolism under continuous fermentation

✍ Scribed by Hiroshi Kuriyama; Warapa Mahakarnchanakul; Shin Matsui; Harumi Kobayashi

Publisher: Springer Netherlands
Year: 1993
Tongue: English
Weight: 420 KB
Volume: 15
Category: Article
ISSN: 0141-5492
DOI: 10.1007/bf00133022

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✦ Synopsis

The effects of pC% were investigated by changing the aeration rate, the purging gas and the total pressure in a chemostat cultivation. Under glucose supply limitation, an increase in pCO2 from 44 kPa to 195 kPa resulted in 25 % decrease in cell concentration, 8 % increase in ethanol concentration, and 50 % decrease in glycerol concentration. Under oxygen supply limitation, similar dependency of ethanol and glycerol on pC@ was observed, however, no influence of pCO2 on the cell yield was observed. The change in ethanol yield by pC@ appeared to be caused by the equilibrium shift of pyruvate dehydrogenase system.

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