Title: Treatment of biomass to obtain fermentable sugars

Abstract

Biomass is pretreated using a low concentration of aqueous ammonia at high biomass concentration. Pretreated biomass is further hydrolyzed with a saccharification enzyme consortium. Fermentable sugars released by saccharification may be utilized for the production of target chemicals by fermentation.

Inventors:

Dunson, Jr., James B. ^[1]; Tucker, Melvin ^[2]; Elander, Richard ^[3]; Hennessey, Susan M ^[4]

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+ Show Inventor Affiliations

1. (Newark, DE)
2. Lakewood, CO
3. Evergreen, CO
4. Avondale, PA

Issue Date:

Tue Apr 26 00:00:00 EDT 2011

Research Org.:

US Department of Energy (USDOE), Washington, DC (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1018212

Patent Number(s):

7932063

Application Number:

11/402,757

Assignee:

E. I. du Pont de Nemours and Company (Wilmington, DE); Alliance For Sustainable Energy LLC (Golden, CO)

Patent Classifications (CPCs):

C - CHEMISTRY C12 - BIOCHEMISTRY C12M - APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY

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 {

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C - CHEMISTRY C12 - BIOCHEMISTRY C12M - APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY

C12M27/02 - {Stirrer or mobile mixing elements}
C12M27/20 - {Baffles
C12M45/02 - {by mechanical forces
C12M45/09 - {by enzymatic treatment}

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 {

C12P19/02 - Monosaccharides
C12P2201/00 - Pretreatment of cellulosic or lignocellulosic material for subsequent enzymatic treatment or hydrolysis
C12P7/08 - produced as by-product or from waste or cellulosic material substrate

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
Y02E50/30 - Fuel from waste

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

Y02W10/40 - Valorisation of by-products of wastewater, sewage or sludge processing

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DOE Contract Number:  

04-03-CA-70224

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY