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Processing biomass

  • US 9,290,780 B2
  • Filed: 07/30/2015
  • Issued: 03/22/2016
  • Est. Priority Date: 04/30/2008
  • Status: Active Grant
First Claim
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1. A mixture comprising:

  • (a) a low molecular weight sugar,(b) a treated cellulosic or lignocellulosic material having a porosity of at least 35% and comprising a plurality of saccharide units arranged in a molecular chain, wherein from about 1 out of every 2 to about 1 out of every 250 saccharide units includes a carboxylic acid functional group,(c) water, and(d) a fermenting microorganism, whereinthe treated cellulosic or lignocellulosic material comprises a cellulosic or lignocellulosic material that has been irradiated with at least 5 Mrad of electron beam radiation, and the carboxylic acid functional groups act as bonding sites for the microorganism.

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