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Characterization of fungual strains for bioethanol production and sugar utilization
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Bioethanol production from cellulose based sources is currently in focus in several research projects and the need of the hour is a versatile fermenting organism that can utilize both 5C and 6C sugars effectively. Several naturally occurring fungi have the property of fermenting both types of sugars more efficiently than the traditionally used Saccharomyces cerevisiae which only can ferment hexose sugars. In this study, six different fungi were grown on a media with sugar concentrations similar to the spent sulphite liquor (SSL) from the paper pulp industry. Known fungi such as S. cerevisiae and T. versicolor as well as 4 unidentified wood rot species were grown in sealed bottles with media containing mixture of 6C and 5C. Comparison was made between ethanol fermentation, sugar consumption and enzyme activities (ALDH and PDC). The fermentation experiment was run for 21 days and ethanol concentrations up to 18g/L were achieved. We conclude that two of the fungi produce sufficient amount of ethanol and could be used in large-scale fermentation processes.

Place, publisher, year, edition, pages
National Category
Biochemistry and Molecular Biology
URN: urn:nbn:se:umu:diva-65433OAI: diva2:603988
Educational program
Master's Programme in Plant and Forest Biotechnology
Life Earth Science
Available from: 2013-02-07 Created: 2013-02-07 Last updated: 2013-02-07Bibliographically approved

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Department of Plant PhysiologyUmeå Plant Science Centre (UPSC)
Biochemistry and Molecular Biology

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