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51313-02681-Diversity of Microorganisms Related to Biocorrosion in Ethanol Samples

Product Number: 51313-02681-SG
ISBN: 02681 2013 CP
Author: Diogo Coutinho
Publication Date: 2013
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Abstract

Ethanol is recognized worldwide as an important source of clean and renewable energy fuel. As the world seeks for alternatives to oil Brazil and USA have been using sugarcane and corn as raw materials in large scale for over 30 years. During this period those countries acquired extensive experience in producing and using that type of alcohol. Among the bio-fuels available bio-ethanol is an attractive candidate with the advantages of a huge resource for production and simple production progress. In Brazil ethanol is used as automotive fuel in two forms: hydrated in ethanol using cars and flex fuel cars or anhydrous alcohol which is added to gasoline. Under favorable conditions bacteria and fungi can form biofilms and participate actively in the process of biocorrosion. The presence of some microorganisms in the biofilms may enhance corrosion by the production of corrosive metabolites such as organic acids. Given the scarcity of studies in the area this work aimed to study the diversity of microorganisms present in samples of ethanol produced from corn and cane in order to identify microbial diversity and possible causes of biocorrosion process.  For this several samples of ethanol from different origins were received and analyzed since 2007. Analyses by commercial culture medium were handled but none of the samples produced colonies. Looking forward to these noncultivable bacteria molecular biology assays were performed. Acinetobacter Burkholderia and Sphingobium were some genera founded. The results allow a better assessment of the susceptibility of storage tanks and pipelines to microbiological corrosion in the presence of ethanol.

Keywords: biocorrosion ethanol cloning
 

Abstract

Ethanol is recognized worldwide as an important source of clean and renewable energy fuel. As the world seeks for alternatives to oil Brazil and USA have been using sugarcane and corn as raw materials in large scale for over 30 years. During this period those countries acquired extensive experience in producing and using that type of alcohol. Among the bio-fuels available bio-ethanol is an attractive candidate with the advantages of a huge resource for production and simple production progress. In Brazil ethanol is used as automotive fuel in two forms: hydrated in ethanol using cars and flex fuel cars or anhydrous alcohol which is added to gasoline. Under favorable conditions bacteria and fungi can form biofilms and participate actively in the process of biocorrosion. The presence of some microorganisms in the biofilms may enhance corrosion by the production of corrosive metabolites such as organic acids. Given the scarcity of studies in the area this work aimed to study the diversity of microorganisms present in samples of ethanol produced from corn and cane in order to identify microbial diversity and possible causes of biocorrosion process.  For this several samples of ethanol from different origins were received and analyzed since 2007. Analyses by commercial culture medium were handled but none of the samples produced colonies. Looking forward to these noncultivable bacteria molecular biology assays were performed. Acinetobacter Burkholderia and Sphingobium were some genera founded. The results allow a better assessment of the susceptibility of storage tanks and pipelines to microbiological corrosion in the presence of ethanol.

Keywords: biocorrosion ethanol cloning
 

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