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Title: Enhanced attrition bioreactor for enzyme hydrolysis or cellulosic materials

A process is described 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 fig.
Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
215240
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; SCA: 090900; PA: EDB-96:070977; SN: 96001569520
Patent Number(s):
US 5,508,183/A/
Application Number:
PAN: 8-239,638
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 16 Apr 1996
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; CELLULOSE; ENZYMATIC HYDROLYSIS; BIOREACTORS; DESIGN; O-GLYCOSYL HYDROLASES; LIQUID FUELS; CHEMICAL FEEDSTOCKS; BIOSYNTHESIS

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