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Type: Artigo de periódico
Title: Kinetic Modeling of Ethanol Production by Scheffersomyces stipitis from Xylose
Author: Farias, D
de Andrade, RR
Maugeri-Filho, F
Abstract: This work focuses on the kinetics of ethanol production by Scheffersomyces stipitis on xylose with the development of a mathematical model considering the effect of substrate and product concentrations on growth rate. Experiments were carried out in batch and continuous modes, with substrate concentration varying from 7.2 to 145 g L-1. Inhibitory effects on cell growth, substrate uptake, and ethanol production rates were found to be considerable. Kinetic parameters were obtained through linear and non-linear regression methods. Experiments in continuous mode were performed at different dilution rates to evaluate the inhibitory effect of ethanol. A mixed mathematical model which combined Andrews and Levenspiel's models, combining substrate and product inhibition, was used. A quasi-Newton routine was applied to obtain a more accurate fitting of kinetic parameters. The parameters such as cell to product factor (Y (P/X)) and limiting cell yield (Y (X)) were shown to be dependent on substrate concentration. The kinetic model fitted satisfactorily the experimental data.
Subject: Ethanol fermentation
Scheffersomyces stipitis
Kinetic parameter estimation
Mathematical modeling
Country: EUA
Editor: Humana Press Inc
Citation: Applied Biochemistry And Biotechnology. Humana Press Inc, v. 172, n. 1, n. 361, n. 379, 2014.
Rights: fechado
Identifier DOI: 10.1007/s12010-013-0546-y
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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