Influence of oxygen transfer rate and media composition on fermentation ofd-xylose byPichia stipitis NRRL Y-7124
- 1 June 1991
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Industrial Microbiology & Biotechnology
- Vol. 7 (4) , 287-291
- https://doi.org/10.1007/bf01577657
Abstract
The optimization of ethanol production byPichia stipitis NRRL Y-7124 was analysed by ATP balance. Ethanol volumetric productivity was maximal (0.5–0.6 g/l h) only over a narrow range of oxygen transfer rates (3–5 mmol O2/l h). Trace element supplements increased ethanol volumetric productivity 20%. Biotin and thiamine did not significantly affect ethanol yield. Vitamins and trace elements were not synergistic. Organic nitrogen source from yeast extract was used for growth simultaneously to ammonia.Keywords
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