Growth and Fermentation Characteristics of a Strain of the Wine Yeast Kluyveromyces thermotolerans Isolated in Greece |
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Authors: | K. Kapsopoulou A. Kapaklis H. Spyropoulos |
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Affiliation: | (1) Department of Oenology and Beverage Technology, Technological Educational Institution (TEI) of Athens, Ag. Spyridonos Street, 122 10 Athens, Greece |
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Abstract: | Summary During the single culture fermentation of grape must K. thermotolerans, strain TH941, isolated in a wine-producing region in northern Greece, reached a very high cell concentration of 8.4 log (c.f.u ml−1), followed by a rapid decline of the viable cells. The yeast produced 9.6 g L-lactic acid l−1 during the growth phase, 7.58% v/v of ethanol and showed a limited degradation of L-malic acid as well as a low production of volatile acidity. In the presence of 3% v/v and 6% v/v of ethanol the K. thermotolerans isolate was able to grow. At 9% v/v of ethanol it could not grow but showed no loss of viability for 10 days. |
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Keywords: | Cell viability with ethanol grape must fermentation growth with ethanol K. thermotolerans L-lactic acid production |
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