Summary
Growth and ethanol production byPichia stipitis in media containing different nitrogen sources were compared. Ammonium sulphate (plus vitamins and trace elements) increased ethanol productivity 57% and ethanol-biomass yield 113%, compared to yeast extract. Consumption of ammoniu, amino-acids and total nitrogen was determined. Two ammonium effects, low uptake in complex media and fermentation stimulation in defined media are discussed in terms of ammonium- ammonia futile cycling and maintenance energy.
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Guebel, D.V., Cordenons, A., Cascone, O. et al. Influence of the nitrogen source on growth and ethanol production byPichia stipitis NRRL Y-7124. Biotechnol Lett 14, 1193–1198 (1992). https://doi.org/10.1007/BF01027027
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DOI: https://doi.org/10.1007/BF01027027