Abstract
With D-xylose (50 g l ) as sole carbon substrate, aerobic cultures of S. cerevisiae consumed significant amounts of sugar (26.4 g l ), producing 4.0 g xylitol l but no ethanol. In the presence of a mixture of glucose (35 g l ) and xylose (15 g l ), yeasts consumed 1.6 g xylose l that was converted nearly stoichiometrically to xylitol. Anaerobic conditions lessened xylose consumption and its conversion into xylitol. Traces of ethanol (0.4 g l ) were produced when xylose was the only carbon source, however. Agar-entrapped yeasts behaved as anaerobically-grown cultures but with higher specific rates of xylose consumption and xylitol production.
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Lebeau, T., Jouenne, T. & Junter, GA. Fermentation of D-xylose by free and immobilized Saccharomyces cerevisiae. Biotechnology Letters 19, 615–618 (1997). https://doi.org/10.1023/A:1018322311552
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DOI: https://doi.org/10.1023/A:1018322311552