Chemistry: molecular biology and microbiology – Apparatus – Bioreactor
Patent
1996-01-25
1997-06-10
Redding, David A.
Chemistry: molecular biology and microbiology
Apparatus
Bioreactor
422234, C12M 300
Patent
active
056375026
ABSTRACT:
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.
REFERENCES:
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patent: 5270189 (1993-12-01), Scott et al.
patent: 5348871 (1994-09-01), Scott et al.
Riley, R. "Reverse Osmosis" Membrane Separation Systems Apr. 1990 vol. 2 U.S. D.O.E. Office of Energy Research.
Wright et al. "Simultaneous Saccharification and Fermentation of Lignocellulose" The Human Press 1988 pp. 75-90.
Davison Brian H.
Faison Brendlyn D.
Scott Charles D.
Scott Timothy C.
Woodward Jonathan
Lockheed Martin Energy Systems, Inc.
Redding David A.
Smirman Preston H.
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