The use of a thermotolerant fermentative Kluyveromyces marxianus IMB3 yeast strain for ethanol production

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Abstract

An investigation was carried out on the growth and ethanol production of a novel thermotolerant ethanol-producing Kluyveromyces marxianus IMB3 yeast strain. It grew aerobically on glucose, lactose, cellobiose, xylose and whey permeate and fermented all the above carbon sources to ethanol at 45 degrees C. This strain was capable of growing under anaerobic chemostat fermentation conditions at 45 degrees C and a dilution rate of 0.15 h(-1) and produced less than or equal to 0.9 g/l biomass and 1.8% (v/v) ethanol. An increase in biomass (up to 10.0 g/l) and ethanol (up to 4.3% v/v at 45 degrees C and 7.7% v/v at 40 degrees C) were achieved by applying a continuous two-stage fermentation in sequence (one aerobic and one anaerobic stage) or a two-stage anaerobic fermentation with cell recycling. Potential applications, involving alcohol production systems, for use in dairy and wood related industries, were discussed.
LanguageEnglish
Pages215-223
JournalACTA Biotechnologica
Volume16
Issue number2-3
Publication statusPublished - 1996

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Kluyveromyces
Yeast
Ethanol
Yeasts
Fermentation
Biomass
Chemostats
Cellobiose
Xylose
Dairies
Lactose
Dilution
Glucose
Recycling
Wood
Industry
Alcohols
Carbon
Growth

Cite this

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title = "The use of a thermotolerant fermentative Kluyveromyces marxianus IMB3 yeast strain for ethanol production",
abstract = "An investigation was carried out on the growth and ethanol production of a novel thermotolerant ethanol-producing Kluyveromyces marxianus IMB3 yeast strain. It grew aerobically on glucose, lactose, cellobiose, xylose and whey permeate and fermented all the above carbon sources to ethanol at 45 degrees C. This strain was capable of growing under anaerobic chemostat fermentation conditions at 45 degrees C and a dilution rate of 0.15 h(-1) and produced less than or equal to 0.9 g/l biomass and 1.8{\%} (v/v) ethanol. An increase in biomass (up to 10.0 g/l) and ethanol (up to 4.3{\%} v/v at 45 degrees C and 7.7{\%} v/v at 40 degrees C) were achieved by applying a continuous two-stage fermentation in sequence (one aerobic and one anaerobic stage) or a two-stage anaerobic fermentation with cell recycling. Potential applications, involving alcohol production systems, for use in dairy and wood related industries, were discussed.",
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The use of a thermotolerant fermentative Kluyveromyces marxianus IMB3 yeast strain for ethanol production. / Banat, Ibrahim; Singh, D; Marchant, Roger.

In: ACTA Biotechnologica, Vol. 16, No. 2-3, 1996, p. 215-223.

Research output: Contribution to journalArticle

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AU - Marchant, Roger

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AB - An investigation was carried out on the growth and ethanol production of a novel thermotolerant ethanol-producing Kluyveromyces marxianus IMB3 yeast strain. It grew aerobically on glucose, lactose, cellobiose, xylose and whey permeate and fermented all the above carbon sources to ethanol at 45 degrees C. This strain was capable of growing under anaerobic chemostat fermentation conditions at 45 degrees C and a dilution rate of 0.15 h(-1) and produced less than or equal to 0.9 g/l biomass and 1.8% (v/v) ethanol. An increase in biomass (up to 10.0 g/l) and ethanol (up to 4.3% v/v at 45 degrees C and 7.7% v/v at 40 degrees C) were achieved by applying a continuous two-stage fermentation in sequence (one aerobic and one anaerobic stage) or a two-stage anaerobic fermentation with cell recycling. Potential applications, involving alcohol production systems, for use in dairy and wood related industries, were discussed.

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