Effective diffusion coefficients and bioconversion rates of inhibitory compounds in flocs of Saccharomyces cerevisiae
Electron. j. biotechnol
;
42: 1-5, Nov. 2019. tab, graf
Article
in English
| LILACS
| ID: biblio-1087340
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. Thièle-type moduli and internal effectiveness factors were obtained by simulating a simple steady-state spherical floc model.Conclusions:
The obtained values for the Thiéle moduli and internal effectiveness factors showed that the bioconversion rate of the inhibitory compounds is the dominant phenomenon over mass transfer inside the flocs.
Full text:
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Index:
LILACS (Americas)
Main subject:
Saccharomyces cerevisiae
/
Biofuels
Type of study:
Prognostic study
Language:
English
Journal:
Electron. j. biotechnol
Journal subject:
Biotechnology
Year:
2019
Type:
Article
Affiliation country:
Chile
Institution/Affiliation country:
Pontificia Universidad Católica de Valparaíso/CL
/
Universidad Tecnológica Metropolitana/CL
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