Interaction of Saccharomyces cerevisiae-Lactobacillus fermentum-Dekkera bruxellensis and feedstock on fuel ethanol fermentation

Antonie van Leeuwenhoek
Ana Paula Guarnieri BassiSandra Regina Ceccato-Antonini

Abstract

The alcoholic fermentation for fuel ethanol production in Brazil occurs in the presence of several microorganisms present with the starter strain of Saccharomyces cerevisiae in sugarcane musts. It is expected that a multitude of microbial interactions may exist and impact on the fermentation yield. The yeast Dekkera bruxellensis and the bacterium Lactobacillus fermentum are important and frequent contaminants of industrial processes, although reports on the effects of both microorganisms simultaneously in ethanolic fermentation are scarce. The aim of this work was to determine the effects and interactions of both contaminants on the ethanolic fermentation carried out by the industrial yeast S. cerevisiae PE-2 in two different feedstocks (sugarcane juice and molasses) by running multiple batch fermentations with the starter yeast in pure or co-cultures with D. bruxellensis and/or L. fermentum. The fermentations contaminated with D. bruxellensis or L. fermentum or both together resulted in a lower average yield of ethanol, but it was higher in molasses than that of sugarcane juice. The decrease in the CFU number of S. cerevisiae was verified only in co-cultures with both D. bruxellensis and L. fermentum concomitant with higher re...Continue Reading

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Citations

Sep 22, 2018·FEMS Microbiology Letters·Lincon Felipe Lima SilvaSandra Regina Ceccato-Antonini
Feb 23, 2020·Microorganisms·Seung-Oh SeoJun-Seob Kim
Apr 17, 2019·Applied Microbiology and Biotechnology·Karen Cristina CollograiJaciane Lutz Ienczak
May 29, 2018·World Journal of Microbiology & Biotechnology·Sandra Regina Ceccato-Antonini
Jun 23, 2021·Essays in Biochemistry·Ana Paula JacobusAndreas Karoly Gombert

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Methods Mentioned

BETA
protein folding

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Empower

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