Applied Biochemistry and Biotechnology

, Volume 57, Issue 1, pp 157–170

Conversion of lignocellulosics pretreated with liquid hot water to ethanol

  • G. Peter van Walsum
  • Stephen G. Allen
  • Mark J. Spencer
  • Mark S. Laser
  • Michael J. Antal
  • Lee R. Lynd
Session 1 Thermal, Chemical, and Biological Processing

Abstract

Lignocellulosic materials pretreated using liquid hot water (LHW) (220°C, 5 MPa, 120 s) were fermented to ethanol by batch simultaneous saccharification and fermentation (SSF) usingSaccharomyces cerevisiae in the presence ofTrichoderma reesei cellulase. SSF of sugarcane bagasse (as received), aspen chips (smallest dimension 3 mm), and mixed hardwood flour (−60 +70 mesh) resulted in 90% conversion to ethanol in 2–5 d at enzyme loadings of 15–30 FPU/g. In most cases, 90% of the final conversion was achieved within 75 h of inoculation. Comminution of the pretreated substrates did not affect the conversion to ethanol. The hydrolysate produced from the LHW pretreatment showed slight inhibition of batch growth ofS. cerevisiae. Solids pretreated at a concentration of 100 g/L were as reactive as those pretreated at a lower concentration, provided that the temperature was maintained at 220°C.

Index Entries

Liquid hot water pretreatment SSF inhibition particle size reduction 

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Copyright information

© Humana Press Inc. 1996

Authors and Affiliations

  • G. Peter van Walsum
    • 1
  • Stephen G. Allen
    • 2
  • Mark J. Spencer
    • 2
  • Mark S. Laser
    • 1
  • Michael J. Antal
    • 2
  • Lee R. Lynd
    • 1
  1. 1.Thayer School of EngineeringDartmouth CollegeHanover
  2. 2.Hawaii Natural Energy InstituteUniversity of Hawaii at ManoaHonolulu

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