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Type: Artigo
Title: Chemical inhibition of the contaminant lactobacillus fermentum from distilleries producing fuel bioethanol
Author: Oliva Neto, Pedro de
Lima, Fabíola Aliaga de
Silva, Ketrin Cristina da
Silva, Douglas Fernandes da
Carvalho, Ana Flavia Azevedo
Santos, Catarina dos
Abstract: The purpose of this study was to determine the Minimum Inhibitory Concentration (MIC) of pure or mixed chemicals for Saccharomyces cerevisiae and Lactobacillus fermentum in the samples isolated from distilleries with serious bacterial contamination problems. The biocides, which showed the best results were: 3,4,4' trichlorocarbanilide (TCC), tested at pH 4.0 (MIC = 3.12 mg/l), TCC with benzethonium chloride (CBe) at pH 6.0 (MIC = 3.12 mg/l) and TCC mixed with benzalkonium chloride (CBa) at pH 6.0 (MIC = 1.53 mg /l). If CBa was used in sugar cane milling in 1:1 ratio with TCC, a 8 times reduction of CBa was possible. This formulation also should be tested in fermentation steps since it was more difficult for the bacterium to develop resistance to biocide. There was no inhibition of S. cerevisiae and there were only antibiotics as an option to bacterial control of fuel ethanol fermentation by S. cerevisiae
Subject: Etanol
Country: Brasil
Editor: Instituto de Tecnologia do Paraná
Rights: Aberto
Identifier DOI: 10.1590/S1516-8913201401214
Date Issue: 2014
Appears in Collections:FEA - Artigos e Outros Documentos

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