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Inhibition effects of furfural on aerobic batch cultivation of Saccharomyces cerevisiae growing on ethanol and/or acetic acid
Dept. of Chem. Reaction Engineering, Chalmers University of Technology.ORCID iD: 0000-0003-4887-2433
Department of Molecular Biotechnology, Chalmers University of Technology.
Dept. of Chem. Reaction Engineering, Chalmers University of Technology.
Department of Chemical Engineering II, Lund Institute of Technology.
2000 (English)In: Journal of Bioscience and Bioengineering, ISSN 1389-1723, E-ISSN 1347-4421, Vol. 90, no 4, p. 374-380Article in journal (Refereed) Published
Abstract [en]

Physiological effects of furfural on Saccharomyces cerevisiae growing on ethanol (15 g · l-1) or acetate (20 g · l-1) as the carbon and energy source were investigated. Furfural (4 g · l-1), which was added during the exponential growth phase in batch cultures, was found to strongly inhibit cell growth on both carbon sources. No biomass formation occurred in the presence of furfural. However, furfural was in both cases converted to furfuryl alcohol and furoic acid, and growth resumed after complete conversion of furfural. During growth on ethanol, a rapid initial conversion of furfural to furfuryl alcohol was observed during the first few minutes after the addition of furfural, after which the conversion rate decreased to approximately 0.15 g · g-1 · h-1 for the remaining conversion time. Acetaldehyde accumulated in the medium during the first few hours of conversion. Interestingly, addition of acetate after furfural addition resulted in an increased conversion rate of furfural and a higher carbon dioxide evolution rate, but no growth was observed until after complete conversion of furfural. Furfural addition to cells growing on acetate as the sole carbon source induced no formation of acetaldehyde, and the furfural conversion rate was lower than that on ethanol. The relationship between inhibition effects of furfural and NADH consumption is discussed.Physiological effects of furfural on Saccharomyces cerevisiae growing on ethanol (15 g.l-1) or acetate (20 g. l-1) as the carbon and energy source were investigated. Furfural (4g.l-1), which was added during the exponential growth phase in batch cultures, was found to strongly inhibit cell growth on both carbon sources. No biomass formation occurred in the presence of furfural. However, furfural was in both cases converted to furfuryl alcohol and furoic acid, and growth resumed after complete conversion of furfural. During growth on ethanol, a rapid initial conversion of furfural to furfuryl alcohol was observed during the first few minutes after the addition of furfural, after which the conversion rate decreased to approximately 0.15 g.g-1.h-1 for the remaining conversion time. Acetaldehyde accumulated in the medium during the first few hours of conversion. Interestingly, addition of acetate after furfural addition resulted in an increased conversion rate of furfural and a higher carbon dioxide evolution rate, but no growth was observed until after complete conversion of furgural. Furfural addition to cells growing on acetate as the sole carbon source induced no formation of acet aldehyde, and the furfural conversion rate was lower than that on ethanol. The relationship between inhibition effects of furfural and NADH consumption is discussed.

Place, publisher, year, edition, pages
Elsevier Science Publishers B.V. , 2000. Vol. 90, no 4, p. 374-380
Keywords [en]
Acetaldehyde, Acetate, Acyloin, Ethanol, Furfural, Yeast
National Category
Industrial Biotechnology
Identifiers
URN: urn:nbn:se:hb:diva-14854DOI: 10.1016/S1389-1723(01)80004-9Scopus ID: 2-s2.0-0034302042ISBN: 13891723 (ISSN) OAI: oai:DiVA.org:hb-14854DiVA, id: diva2:1236332
Available from: 2018-08-01 Created: 2018-08-01 Last updated: 2018-08-08Bibliographically approved

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Taherzadeh, Mohammad J

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