NDLI: Assessing the potential of wild yeasts for bioethanol production

Content Provider	Springer Nature Link
Author	Ruyters, Stefan Mukherjee, Vaskar Verstrepen, Kevin J. Thevelein, Johan M. Willems, Kris A. Lievens, Bart
Copyright Year	2014
Abstract	Bioethanol fermentations expose yeasts to a new, complex and challenging fermentation medium with specific inhibitors and sugar mixtures depending on the type of carbon source. It is, therefore, suggested that the natural diversity of yeasts should be further exploited in order to find yeasts with good ethanol yield in stressed fermentation media. In this study, we screened more than 50 yeast isolates of which we selected five isolates with promising features. The species Candida bombi, Wickerhamomyces anomalus and Torulaspora delbrueckii showed better osmo- and hydroxymethylfurfural tolerance than Saccharomyces cerevisiae. However, S. cerevisiae isolates had the highest ethanol yield in fermentation experiments mimicking high gravity fermentations (25 % glucose) and artificial lignocellulose hydrolysates (with a myriad of inhibitors). Interestingly, among two tested S. cerevisiae strains, a wild strain isolated from an oak tree performed better than Ethanol Red, a S. cerevisiae strain which is currently commonly used in industrial bioethanol fermentations. Additionally, a W. anomalus strain isolated from sugar beet thick juice was found to have a comparable ethanol yield, but needed longer fermentation time. Other non-Saccharomyces yeasts yielded lower ethanol amounts.
Starting Page	39
Ending Page	48
Page Count	10
File Format	PDF
ISSN	13675435
Journal	Journal of Industrial Microbiology and Biotechnology
Volume Number	42
Issue Number	1
e-ISSN	14765535
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-11-21
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Bioethanol Lignocellulose Nectar Wickerhamomyces anomalus Thick juice Microbiology Biochemistry Inorganic Chemistry Genetic Engineering Biotechnology Bioinformatics
Content Type	Text
Resource Type	Article
Subject	Medicine Bioengineering Applied Microbiology and Biotechnology Biotechnology

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