Biotechnology Letters

, Volume 8, Issue 10, pp 749–752

SO2-catalysed prehydrolysis of coniferous wood for ethanol production

  • Morris Wayman
  • Sarad Parekh
  • Esteban Chornet
  • Ralph P. Overend
Article

Summary

This paper reports studies of large scale, 1500 kg/h, SO2-catalysed prehydrolysis of coniferous wood chips, samples then being hydrolyzed by a wood-saccharifying enzyme system followed by fermentation to ethanol in the laboratory. Hemicellulose hydrolysis using SO2 catalyst (prehydrolysis) was found to be more effective than steam alone (autohydrolysis). Prehydrolysis time was 2 min, with steam pressure at 1.2 to 1.7 MPa (175 to 250 psig), and SO2 catalyst 2.0 to 2.6% on dry wood. The amount of sugars recovered upon enzyme saccharification of the prehydrolysed wood was about 70% of the weight of the wood. When these combined hemicellulose and cellulose sugars were fermented by a pentose-fermenting strain of yeast,Pichia stipitis R, 372 L ethanol/tonne of (dry) wood was obtained.

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References

  1. Parekh, S., Yu, S. and Wayman, M. 1986. J. Appl. MIcrobiol. and Biotechn. in press.Google Scholar
  2. Wayman, M., Lora, J.H. and Gulbinas, E. 1979. Chemistry for Energy, ACS Symposium Series Monograph No. 90, 183–201.Google Scholar
  3. Wayman, M. and Parekh, S. 1985. Biotechn. Letts. 7:909–912.Google Scholar
  4. Wayman, M., Tallevi, A. and Winsborrow, B. 1984. Biomass 6:183–191.Google Scholar

Copyright information

© Kluwer Academic Publishers 1986

Authors and Affiliations

  • Morris Wayman
    • 1
  • Sarad Parekh
    • 1
  • Esteban Chornet
    • 2
  • Ralph P. Overend
    • 2
    • 3
  1. 1.University of TorontoTorontoCanada
  2. 2.Département de génie chimiqueUniversité de SherbrookeSherbrookeCanada
  3. 3.Division of BiosciencesNational 1 Research Council of CanadaOttawaCanada

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