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Acceleration of high gravity yeast fermentations by acetaldehyde addition

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Abstract

In high gravity Saccharomyces cerevisiae fermentations containing 300 g glucose l−1, daily addition of acetaldehyde to a total of 93 mM shortened the time required to ferment the first 250 g glucose l−1 from 790 h to 585 h. Acetaldehyde feeding had no effect on the ethanol yield but increased by 135%, 78% and 77% the final concentrations of 2,3-butanediol, 2-methylpropanol and acetate, while decreasing that of glycerol by 14%. Controlled acetaldehyde feeding has potential as a technique for accelerating high gravity fuel or industrial ethanol fermentations and may be useful in preventing incomplete fermentations.

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Authors and Affiliations

  1. Department of Chemical Engineering, University of Melbourne, 3010 Melbourne, Australia

    Andrew R. Barber, Marcus Henningsson & Neville B. Pamment

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  1. Andrew R. Barber
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  2. Marcus Henningsson
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  3. Neville B. Pamment
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Barber, A.R., Henningsson, M. & Pamment, N.B. Acceleration of high gravity yeast fermentations by acetaldehyde addition. Biotechnology Letters 24, 891–895 (2002). https://doi.org/10.1023/A:1015541331460

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  • DOI: https://doi.org/10.1023/A:1015541331460

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