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Process for Sugar Production from Lignocellulosic Biomass Using Alkali Pretreatment

  • US 20100143974A1
  • Filed: 01/31/2008
  • Published: 06/10/2010
  • Est. Priority Date: 02/01/2007
  • Status: Abandoned Application
First Claim
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1. A method for producing fermentable sugars from lignocellulosic biomass, said method comprising the sequential steps of:

  • (a) Treating the biomass with an aqueous alkali solution at ambient pressure and at greater than ambient temperature for a time sufficient to enhance the susceptibility of the biomass to a subsequent saccharification enzyme hydrolysis step;

    (b) Pressing the treated mixture at a pressure great enough to remove sufficient water, alkali, and lignin from the biomass to enhance the susceptibility of the de-watered biomass to a subsequent saccharification enzyme hydrolysis step; and

    (c) Contacting the de-watered biomass with one or more saccharification enzymes under conditions conducive to producing fermentable sugars.

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