Title: Process for converting cellulosic materials into fuels and chemicals

Abstract

A process for converting cellulosic materials, such as waste paper, into fuels and chemicals utilizing enzymatic hydrolysis of the major constituent of paper, cellulose. A waste paper slurry is contacted by cellulase in an agitated hydrolyzer. The cellulase is produced from a continuous, columnar, fluidized-bed bioreactor utilizing immobilized microorganisms. An attritor and a cellobiase reactor are coupled to the agitated hydrolyzer to improve reaction efficiency. The cellulase is recycled by an adsorption process. The resulting crude sugars are converted to dilute product in a fluidized-bed bioreactor utilizing microorganisms. The dilute product is concentrated and purified by utilizing distillation and/or a biparticle fluidized-bed bioreactor system.

Inventors:

Scott, Charles D ^[1]; Faison, Brendlyn D ^[2]; Davison, Brian H ^[2]; Woodward, Jonathan ^[1]

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+ Show Inventor Affiliations

1. Oak Ridge, TN
2. Knoxville, TN

Issue Date:

Sat Jan 01 00:00:00 EST 1994

Research Org.:

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:

869506

Patent Number(s):

5348871

Assignee:

Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)

Patent Classifications (CPCs):

C - CHEMISTRY C12 - BIOCHEMISTRY C12P - FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE {

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

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C - CHEMISTRY C12 - BIOCHEMISTRY C12P - FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE {

C12P1/04 - by using bacteria
C12P19/14 - produced by the action of a carbohydrase {

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E50/10 - Biofuels

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10S435/813 - Continuous fermentation

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DOE Contract Number:  

AC05-84OR21400

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

process; converting; cellulosic; materials; fuels; chemicals; waste; paper; utilizing; enzymatic; hydrolysis; major; constituent; cellulose; slurry; contacted; cellulase; agitated; hydrolyzer; produced; continuous; columnar; fluidized-bed; bioreactor; immobilized; microorganisms; attritor; cellobiase; reactor; coupled; improve; reaction; efficiency; recycled; adsorption; resulting; crude; sugars; converted; dilute; product; concentrated; purified; distillation; biparticle; waste paper; agitated hydrolyzer; cellulosic material; dilute product; reaction efficiency; cellulosic materials; fluidized-bed bioreactor; enzymatic hydrolysis; reactor utilizing; utilizing enzymatic; biparticle fluidized; paper slurry; cellobiase reactor; converting cellulosic; bioreactor utilizing; adsorption process; improve reaction; sorption process; bed bioreactor; major constituent; /435/422/