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Acetic acid-friend or foe in anaerobic batch conversion of glucose to ethanol by Saccharomyces cerevisiae?
Dept. of Chem. Reaction Engineering, Chalmers University of Technology.ORCID iD: 0000-0003-4887-2433
Dept. of Chem. Reaction Engineering, Chalmers University of Technology.
Dept. of Chem. Reaction Engineering, Chalmers University of Technology.
1997 (English)In: Chemical Engineering Science, ISSN 0009-2509, Vol. 52, no 15, p. 2653-2659Article in journal (Refereed) Published
Abstract [en]

The permissible region of growth of Saccharomyces cerevisiae on glucose under anaerobic conditions was determined as a function of both pH and the concentration of added acetic acid to the medium. In the absence of acetic acid, growth was possible at a pH as low as 2.5, whereas a total acetic acid addition of 10 gl-1 increased the minimum allowable pH for growth to 4.5. The results showed that the concentration of the undissociated form of acetic acid should not exceed 5 gl-1 in the medium for growth to occur. The addition of acetic acid had a profound effect on growth energetics, thereby leading to an increased ethanol yield on glucose. At a concentration of 3.3 gl-1 of undissociated acetic acid, the ethanol yield was 20% higher than without added acetic acid. Furthermore, the biomass and glycerol yields decreased by 45 and 33%, respectively.The permissible region of growth of Saccharomyces cerevisiae on glucose under anaerobic conditions was determined as a function of both pH and the concentration of added acetic acid to the medium. In the absence of acetic acid, growth was possible at a pH as low as 2.5, whereas a total acetic acid addition of 10 g l-1 increased the minimum allowable pH for growth to 4.5. The results showed that the concentration of the undissociated form of acetic acid should not exceed 5 g l-1 in the medium for growth to occur. The addition of acetic acid had a profound effect on growth energetics, thereby leading to an increased ethanol yield on glucose. At a concentration of 3.3 g l-1 of undissociated acetic acid, the ethanol yield was 20% higher than without added acetic acid. Furthermore, the biomass and glycerol yields decreased by 45 and 33%, respectively.

Place, publisher, year, edition, pages
Oxford, United Kingdom: Elsevier Science Ltd , 1997. Vol. 52, no 15, p. 2653-2659
Keywords [en]
Ethanol, Glycerol, Growth energetics, PH, Yeast
National Category
Industrial Biotechnology
Identifiers
URN: urn:nbn:se:hb:diva-14860DOI: 10.1016/S0009-2509(97)00080-8ISI: A1997XM23200018Scopus ID: 2-s2.0-0031214487ISBN: 00092509 (ISSN) OAI: oai:DiVA.org:hb-14860DiVA, id: diva2:1236315
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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