Effective diffusion coefficients and bioconversion rates of inhibitory compounds in flocs of Saccharomyces cerevisiae

Landaeta R.; Acevedo F.; Aroca G.

Abstract

Background: Fermentation strategies for bioethanol production that use flocculating Saccharomyces cerevisiae yeast need to account for the mechanism by which inhibitory compounds, generated in the hydrolysis of lignocellulosic materials, are tolerated and detoxified by a yeast floc. Results: Diffusion coefficients and first-order kinetic bioconversion rate coefficients were measured for three fermentation inhibitory compounds (furfural, hydroxymethylfurfural, and vanillin) in self-aggregated flocs of S. cerevisiae NRRL Y-265. Thiele-type moduli and internal effectiveness factors were obtained by simulating a simple steady-state spherical floc model. Conclusions: The obtained values for the Thiele moduli and internal effectiveness factors showed that the bioconversion rate of the inhibitory compounds is the dominant phenomenon overmass transfer inside the flocs. (C) 2019 Pontificia Universidad Catolica de Valparaiso. Production and hosting by Elsevier B.V. All rights reserved.

Más información

Título según WOS: Effective diffusion coefficients and bioconversion rates of inhibitory compounds in flocs of Saccharomyces cerevisiae
Título según SCOPUS: Effective diffusion coefficients and bioconversion rates of inhibitory compounds in flocs of Saccharomyces cerevisiae
Título de la Revista: Electronic Journal of Biotechnology
Volumen: 42
Editorial: UNIV CATOLICA DE VALPARAISO
Fecha de publicación: 2019
Página de inicio: 1
Página final: 5
Idioma: English
DOI:

10.1016/j.ejbt.2019.08.001

Notas: ISI, SCOPUS