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Bottlenecks in lign...
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van Dijk, Marlous,1990Chalmers tekniska högskola,Chalmers University of Technology
(author)
Bottlenecks in lignocellulosic ethanol production: xylose fermentation and cell propagation
- Article/chapterEnglish2017
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LIBRIS-ID:oai:research.chalmers.se:c813fe0c-e005-4069-a6c7-e7332df622bd
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https://research.chalmers.se/publication/254294URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:kon swepub-publicationtype
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Subject category:vet swepub-contenttype
Notes
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A remaining challenge for the development of economically feasible 2nd generation bio-ethanol is low xylose consumption rate and inhibitor tolerance of the utilized Saccharomyces cerevisiae strains. Yeast starter cultures produced for ethanol production in simultaneous saccharification and co-fermentation (SSCF) processes have to meet high, seemingly conflicting requirements. A high biomass yield during propagation is required to produce the high cell concentrations required for the harsh conditions in the proceeding fermentation. Inhibitor tolerance is essential for producing a highly viable starter culture as well as favorable fermentation kinetics. Short-term adaptation of yeast cultures during propagation has been shown to have a positive effect on pentose conversion as well as inhibitor tolerance. Here we propose a model propagation strategy for evaluating physiology of yeast cultures during propagation. This model propagation strategy will be implemented in a study comparing physiology of yeast cultures with and without exposure to lignocellulosic inhibitors during propagation to assess what molecular mechanisms underlie the short-term adaptation response phenotype. For industry, a better control of yeast properties during propagation will result in an improved and consistent performance of yeast starter cultures for SSCF purposes.
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Olsson, Lisbeth,1963Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lisbetho
(author)
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Chalmers tekniska högskola
(creator_code:org_t)
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In:European biomass conference 2017, 25th edition, June 12-15; Stockholm, Sweden.
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