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Epidemic based modeling of enzymatic hydrolysis of lignocellulosic biomass

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An epidemic based model was developed to describe the enzymatic hydrolysis of a lignocellulosic biomass, dilute sulfuric acid pretreated corn stover. The process of substrate getting adsorbed and digested by enzyme was simulated as susceptibles getting infected by viruses and becoming removed and recovered. This model simplified the dynamic enzyme “infection” process and the catalysis of cellulose into a two‐parameter controlled, enzyme behavior guided mechanism. Furthermore, the model incorporates the adsorption block by lignin and inhibition effects on cellulose catalysis. The model satisfactorily predicted the enzyme adsorption and hydrolysis, negative role of lignin, and inhibition effects over hydrolysis for a broad range of substrate and enzyme loadings. Sensitivity analysis was performed to evaluate the incorporation of lignin and other inhibition effects. Our model will be a useful tool for evaluating the effects of parameters during hydrolysis and guide a design strategy for continuous hydrolysis and the associated process control. © 2014 American Institute of Chemical Engineers Biotechnol. Prog., 30:1021–1028, 2014
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Keywords: SIR modeling; bioconversion; biofuels; enzymatic hydrolysis; kinetic modeling

Document Type: Research Article

Publication date: September 1, 2014

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