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Bottlenecks in lign...
Bottlenecks in lignocellulosic ethanol production: xylose fermentation and cell propagation
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- van Dijk, Marlous, 1990 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Olsson, Lisbeth, 1963 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2017
- 2017
- English.
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In: European biomass conference 2017, 25th edition, June 12-15; Stockholm, Sweden..
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Abstract
Subject headings
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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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Biokemikalier (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Biochemicals (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Bioenergi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bioenergy (hsv//eng)
Keyword
- Adaptation
- Cellulosic ethanol
- Propagation
Publication and Content Type
- kon (subject category)
- vet (subject category)
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