Enhanced attrition bioreactor for enzyme hydrolysis or cellulosic materials

Patent · 31 December 1995

OSTI ID:870376

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

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1. Knoxville, TN
2. Oak Ridge, TN

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.

• Research Organization: LOCKHEED MARTIN ENRGY SYST INC
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5508183
• OSTI ID: 870376
• Country of Publication: United States
• Language: English

Related Subjects

/435/241/422/
additionally
agitated
agitated hydrolyzer
attrition
attrition bioreactor
attritor
bed bioreactor
biocatalyst
bioreactor
bioreactor utilizing
carbohydrate
cellobiase
cellobiase reactor
cellulase
cellulose
cellulosic
cellulosic material
cellulosic materials
chemicals
concentrated
contacted
converted
converting
converting cellulosic
coupled
dilute
dilute product
efficiency
enhanced
enhanced attrition
enzymatic
enzymatic hydrolysis
enzyme
enzyme hydrolysis
ethanol
fluidized-bed
fluidized-bed bioreactor
fuels
hydrolysis
hydrolyzer
improve
improve reaction
included
increase
increase reaction
major
major carbohydrate
materials
microfiltration
microorganisms
osmosis
paper
paper slurry
process
product
purified
reaction
reaction efficiency
reactor
reactor utilizing
resulting
reverse
reverse osmosis
slurry
steps
sugars
ultrafiltration
utilizing
utilizing enzymatic
waste
waste paper