Ethanol production from cellulose at 45 degrees C using a hatch-fed system containing alginate-immobilized Kluyveromyces marxianus IMB3

N Barron, R Marchant, L McHale, Anthony McHale

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The thermotolerant yeast, Kluyveromyces marxianus IMB3, was grown in batch culture at 45 degrees C on cellulose-containing media, supplemented with exogenous cellulase activity. At various stages during fermentation, both substrate and enzyme were added in batch mode and fermentation was continued for 220 h. Ethanol production increased to 20 g/l at 200 h, representing 45% of the maximum theoretical yield. In subsequent experiments, the organism was immobilized in calcium alginate beads and these were used in a similar, batch-fed system at 45 degrees C. Again, fermentation was continued for 220 h and ethanol production increased to its maximum, of 28 g/l, within 100 h and this represented in excess of 60% of the maximum theoretical yield.
Original languageEnglish
Pages (from-to)103-104
JournalWorld Journal of Microbiology and Biotechnology
Issue number1
Publication statusPublished - Jan 1996


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