Bioethanol production from grape and sugar beet pomaces by solid-state fermentation |
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Authors: | LA Rodríguez ME ToroF Vazquez ML Correa-DaneriSC Gouiric MD Vallejo |
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Affiliation: | Biotechnology Institute, Engineering Faculty, National University of San Juan, Av. San Martín 1109 (Oeste), 5400 San Juan, Argentina |
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Abstract: | A suitable alternative to replace fossil fuels is the production of bioethanol from agroindustrial waste. Grape pomace is the most abundant residue in San Juan and sugar beet pomace could be important in the region. Solid-State Fermentation (SSF) is a technology that allows transforming agroindustrial waste into many valuable bioproducts, like ethanol. This work reports a laboratory scale SSF to obtain alcohol from grape and sugar beet pomace by means of Saccharomyces cerevisiae yeasts. The initial conditions of the culture medium were: sugars 16.5% (p/p); pH 4.5; humidity 68% (p/p). Cultures were inoculated with 108 cells/g of pomace, and incubated in anaerobic environment, at 28 °C, during 96 h. SSF showed ethanol maximum concentrations at 48 h and ethanol yield on sugars consumed was more than 82%. Yield attained creates expectation about the use of SSF to obtain fuel alcohol. |
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Keywords: | Bioethanol Solid-state fermentation Agroindustrial waste |
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