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Kinetic modeling of enzymatic hydrolysis of cellulose in differently pretreated fibers from dairy manure

Kinetic modeling of enzymatic hydrolysis of cellulose in differently pretreated fibers from dairy... A kinetic model incorporating dynamic adsorption, enzymatic hydrolysis, and product inhibition was developed for enzymatic hydrolysis of differently pretreated fibers from a nitrogen‐rich lignocellulosic material—dairy manure. The effects of manure proteins on the enzyme adsorption profile during hydrolysis have been discussed. Enzyme activity, instead of protein concentration, was used to describe the enzymatic hydrolysis in order to avoid the effect of manure protein on enzyme protein analysis. Dynamic enzyme adsorption was modeled based on a Langmiur‐type isotherm. A first‐order reaction was applied to model the hydrolysis with consideration being given for the product inhibition. The model satisfactorily predicted the behaviors of enzyme adsorption, hydrolysis, and product inhibition for all five sample manure fibers. The reaction conditions were the substrate concentrations of 10–50 g/L, enzyme loadings of 7–150 FPU/g total substrate, and the reaction temperature of 50°C. Biotechnol. Bioeng. 2008;101: 441–451. © 2008 Wiley Periodicals, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biotechnology and Bioengineering Wiley

Kinetic modeling of enzymatic hydrolysis of cellulose in differently pretreated fibers from dairy manure

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References (37)

Publisher
Wiley
Copyright
Copyright © 2008 Wiley Periodicals, Inc., A Wiley Company
ISSN
0006-3592
eISSN
1097-0290
DOI
10.1002/bit.21921
pmid
18435483
Publisher site
See Article on Publisher Site

Abstract

A kinetic model incorporating dynamic adsorption, enzymatic hydrolysis, and product inhibition was developed for enzymatic hydrolysis of differently pretreated fibers from a nitrogen‐rich lignocellulosic material—dairy manure. The effects of manure proteins on the enzyme adsorption profile during hydrolysis have been discussed. Enzyme activity, instead of protein concentration, was used to describe the enzymatic hydrolysis in order to avoid the effect of manure protein on enzyme protein analysis. Dynamic enzyme adsorption was modeled based on a Langmiur‐type isotherm. A first‐order reaction was applied to model the hydrolysis with consideration being given for the product inhibition. The model satisfactorily predicted the behaviors of enzyme adsorption, hydrolysis, and product inhibition for all five sample manure fibers. The reaction conditions were the substrate concentrations of 10–50 g/L, enzyme loadings of 7–150 FPU/g total substrate, and the reaction temperature of 50°C. Biotechnol. Bioeng. 2008;101: 441–451. © 2008 Wiley Periodicals, Inc.

Journal

Biotechnology and BioengineeringWiley

Published: Oct 15, 2008

Keywords: dairy manure; enzymatic hydrolysis; enzyme adsorption; kinetic model; nitrogen‐rich lignocellulosic material; pretreatment

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