The effect of the fermentation system, substrate and cell treatment on the yield of the alcoholic fermentation contaminated with native Saccharomyces cerevisiae and bacteria in consortium

• Grant number: 12/18082-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: August 01, 2013
• End date: November 30, 2015
• Field of knowledge: Biological Sciences - Microbiology - Applied Microbiology
• Principal Investigator: Sandra Regina Ceccato Antonini
• Grantee: Vanda Renata Reis
• Host Institution: Centro de Ciências Agrárias (CCA). Universidade Federal de São Carlos (UFSCAR). Araras , SP, Brazil

Abstract

The ethanolic fermentation is a phenomenum by which the sugars are transformed into ethanol and carbonic dioxide, mainly by the action of yeasts from the species Saccharomyces cerevisiae. Many ways of conducting the fermentation are known. The biological reactor may be operated by descontinuous, fed-batch, semi-continuous or continuous manner, with our without cell recycle. The must may be composed of sugar cane juice or molasses. One of the main concerns in the sugar and alcohol industry is to fight the contaminant microorganisms, represented by bacteria and yeasts that install in the process causing decrease in the ethanol yield. Studies aiming the consortiated effect of bacteria and native yeasts on the fermentation have been scarcely found. This work aims to evaluate the effect of native S. cerevisiae yeasts with rugous colonies and pseudohyphal morphology and bacteria on the fermentation yield of a process conducted by the selected yeast strain PE-02, looking for conditions that minimize the effect of the contaminations. The fermentation system, substrate and cell treatment will be evaluated, searching to understant the role of each microorganism (bacteria, native yeast, selected yeast) during the process.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

REIS, VANDA R.; BASSI, ANA PAULA G.; CERRI, BIANCA C.; ALMEIDA, AMANDA R.; CARVALHO, ISIS G. B.; BASTOS, REINALDO G.; CECCATO-ANTONINI, SANDRA R.. Effects of feedstock and co-culture of Lactobacillus fermentum and wild Saccharomyces cerevisiae strain during fuel ethanol fermentation by the industrial yeast strain PE-2. AMB EXPRESS, v. 8, FEB 16 2018. (12/18082-0, 11/17928-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

REIS, Vanda Renata. Effect of the substrate and the cell treatment conditions on the ethanolic fermentation contaminated with Saccharomyces cerevisiae wild yeasts and Lactobacillus fermentum. 2016. Doctoral Thesis - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) Piracicaba.