文章基本信息

标题：The Control of Lactobacillus sp. by Extracellular Compound Produced by Pseudomonas aeruginosa in the Fermentation Process of Fuel Ethanol Industry in Brazil
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作者：Cíntia Greice Matsuoca Góis ; Lucilene Lopes-Santos ; Jamile Priscila de Oliveira Beranger 等
期刊名称：Journal of Sustainable Bioenergy Systems
印刷版ISSN：2165-400X
电子版ISSN：2165-4018
出版年度：2013
卷号：3
期号：3
页码：194-201
DOI：10.4236/jsbs.2013.33027
出版社：Scientific Research Publishing
摘要：This work evaluated the effect of secondary bacterial metabolites produced by Pseudomonas sp LV strain in control of Lactobacillus sp. population in the microcosm of the vat during ethanol fermentation. The fraction F4 produced by Pseudomonas aeruginosa was extracted with dichloromethane and fractionating by vacuum liquid chromatography obtained in a methanol phase. The evaluation of antibiotic activity of F4 fraction mixed or not with sulphuric acid and Kamoram?. The antibiotic activity of F4 fraction was determined as well as the fermentation efficiency. Also was determined yeast cell viability, budding formation, the viability of budding cells, and number of populations of Saccharomyces cerevisiae and Lactobacillus sp. The results showed that the F4 fraction had high selective antibiotic activity against Lactobacillus sp. but not for S. cerevisae, and no inhibitory effect was observed in the fermentation process by yeast. Also F4 fraction decreased flocculation and foam formation. The F4 has an antibiotic activity against Lactobacillus sp. and should be used as an alternative to control bacteria contamination and foam and flocculation formation in the fuel ethanol fermentation process. The F4 fraction could reduce the use of antibiotics in the control of Lactobacillus sp. population during the fuel ethanol production.
关键词：Fuel Ethanol; Fermentation; Contamination; Lactobacillus; Yeast; Pseudomonas