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

Roberto Landaeta, Fernando Acevedo, GERMAN EDUARDO AROCA ARCAYA

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

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. How to cite: Landaeta R, Acevedo F, Aroca G. Effective diffusion coefficients and bioconversion rates of inhibitory compounds in flocs of Saccharomyces cerevisiae. Electron J Biotechnol 2019;42. https://doi.org/10.1016/j.rjbt.2019.08.001

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalElectronic Journal of Biotechnology
Volume42
DOIs
StatePublished - Nov 2019
Externally publishedYes

Keywords

  • Bioconversion
  • Bioethanol
  • Biofuels
  • Detoxification
  • Diffusivity
  • Fermentation
  • Flocculation
  • Inhibitor tolerance
  • Saccharomyces cerevisiae

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