Enhanced attrition bioreactor for enzyme hydrolysis or cellulosic materials

Patent · Mon Jan 01 00:00:00 EST 1996

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

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