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Title: Enhanced attrition bioreactor for enzyme hydrolysis or cellulosic materials

A process for converting cellulosic materials, such as waste paper, into fuels and chemicals, such as sugars and ethanol, utilizing enzymatic hydrolysis of the major carbohydrate of paper: cellulose. A waste paper slurry is contacted by cellulase in an agitated hydrolyzer. An attritor and a cellobiase reactor are coupled to the agitated hydrolyzer to improve reaction efficiency. Additionally, microfiltration, ultrafiltration and reverse osmosis steps are included to further increase reaction efficiency. The resulting sugars are converted to a dilute product in a fluidized-bed bioreactor utilizing a biocatalyst, such as microorganisms. The dilute product is then concentrated and purified.
 [1];  [2];  [1];  [1];  [2]
  1. (Knoxville, TN)
  2. (Oak Ridge, TN)
Issue Date:
OSTI Identifier:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5508183
Contract Number:
Research Org:
Country of Publication:
United States
enhanced; attrition; bioreactor; enzyme; hydrolysis; cellulosic; materials; process; converting; waste; paper; fuels; chemicals; sugars; ethanol; utilizing; enzymatic; major; carbohydrate; cellulose; slurry; contacted; cellulase; agitated; hydrolyzer; attritor; cellobiase; reactor; coupled; improve; reaction; efficiency; additionally; microfiltration; ultrafiltration; reverse; osmosis; steps; included; increase; resulting; converted; dilute; product; fluidized-bed; biocatalyst; microorganisms; concentrated; purified; reverse osmosis; waste paper; agitated hydrolyzer; cellulosic material; dilute product; reaction efficiency; cellulosic materials; fluidized-bed bioreactor; enzymatic hydrolysis; reactor utilizing; utilizing enzymatic; paper slurry; cellobiase reactor; converting cellulosic; bioreactor utilizing; increase reaction; improve reaction; enzyme hydrolysis; enhanced attrition; bed bioreactor; attrition bioreactor; major carbohydrate; /435/241/422/