Biotechnology Letters

, Volume 7, Issue 6, pp 431–436 | Cite as

Comparative evaluation of ethanol production by xylose-fermenting yeasts presented high xylose concentrations

  • P. J. Slininger
  • R. J. Bothast
  • M. R. Okos
  • M. R. Ladisch


Three strains ofPichiastipitis and three ofCandidashehatae were compared withPachysolentannophilus in their abilities to ferment xylose at concentrations as high as 200 g/L when subjected to both aerobic and microaerophilic conditions. Evaluations based on accumulated ethanol concentrations, ethanol productivities, xylose consumption, and ethanol and xylitol yields were determined from batch culture time courses. Of the strains considered,P.stipitis NRRL Y-7124 seemed most promising since it was able to utilize all but 7 g/L of 150 g/L xylose supplied aerobically to produce 52 g/L ethanol at a yield of 0.39 g per gram xylose (76% of theoretical yield) and at a rate comparable to the fastest shown byC.shehatae NRRL Y-12878. For all strains tested, fermentation results from aerobic cultures were more favorable than those from microaerophilic cultures.


Fermentation Xylose Ethanol Production Batch Culture Ethanol Concentration 
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Copyright information

© Kluwer Academic Publishers 1985

Authors and Affiliations

  • P. J. Slininger
    • 1
  • R. J. Bothast
    • 1
  • M. R. Okos
    • 2
  • M. R. Ladisch
    • 2
  1. 1.Northern Regional Research CenterAgricultucal Research Servicet U.S. Department of AgriculturePeoria
  2. 2.Laboratory of Renewable Resources EngineeringPurdue UniversityWest Lafayette

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