Yeast adaption on the substrate straw

Heike Kahr, Alexander Jäger, Sara Helmberger

Research output: Chapter in Book/Report/Conference proceedingsConference contribution

Abstract

Bioethanol production of lignocellulosics is technologically analyzed, but requires further investigations concerning yield optimization and economic efficiency. One important aspect is to obtain an ideal yeast strain for the fermentation process, which should possess the ability of a stable conversion of C5- and C6-sugars, resistance/tolerance against inhibitory compounds, temperature, ethanol, sugar and industrial stability. For this purpose, several yeast strains have been adapted to the mentioned characteristics using specific natural adaption and systematic selection. For improved utilization of xylose, several yeast strains have been cultivated on xylose-minimal agar for various generations. Yeast strains have been adapted to grow in ascending concentrations of wheat straw hydrolysate medium. Furthermore, several yeast strains have been bred at increased temperatures, with enhanced ethanol and sugar concentrations. Some xylose- as well as hydrolysate-adapted yeast strains show an increased fermentative competence. A few of the thermally adapted yeast strains represent an enhanced fermentative capacity at higher temperature (42 °C). Various yeast strains are tolerant concerning 8-12 % of ethanol and 400-450 g/l of glucose. Some significant improvements concerning ideal yeast strain could have been reached. These improvements offer new possibilities for further optimization.
Translated title of the contributionYeast adaption on the substrate straw
Original languageGerman
Title of host publicationLinköping Electronic Conference Proceedings
Pages492-499
DOIs
Publication statusPublished - 2011
EventProceedings World Renewable Energy Congress – Linköping, Sweden - Linköping, Sweden
Duration: 8 May 201113 May 2011
http://www.wrec2011.com/program.html

Publication series

NameLinköping Electronic Conference Proceedings
ISSN (Print)1650-3686
ISSN (Electronic)1650-3740

Conference

ConferenceProceedings World Renewable Energy Congress – Linköping, Sweden
CountrySweden
CityLinköping
Period08.05.201113.05.2011
Internet address

Keywords

  • Biothanol
  • Biosprit
  • Stroh
  • straw
  • yeast

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