Abstract
Enzymatic hydrolysis is an important but expensive step in the production of ethanol from biomass. Thus, the production of efficient enzymatic cocktails is of great interest for this biotechnological application. The production of endoglucanase and xylanase activites from F. verticillioides were optimized in a factorial design (25) followed by a CCDR design. Endoglucanase and xylanase activities increased from 2.8 to 8.0 U/mL and from 13.4 to 114 U/mL, respectively. The optimal pH and temperature were determined for endoglucanase (5.6, 80 °C), cellobiase (5.6, 60 °C), FPase (6.0, 55 °C) and xylanase (7.0, 50 °C). The optimized crude extract was applied in saccharification and fermentation of sugarcane bagasse from which 9.7 g/L of ethanol was produced at an ethanol/biomass yield of 0.19.
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Acknowledgments
We thank Dr. Luciano Gomes Fietto for kindly give the yeast used in this study. We also thank the Fundação de Amparo à Pesquisa do Estado de Minas Gerais—FAPEMIG and Conselho Nacional de Desenvolvimento Científico e Tecnológico—CNPq for their financial support and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—CAPES for providing scholarships.
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de Almeida, M.N., Guimarães, V.M., Falkoski, D.L. et al. Optimization of Endoglucanase and Xylanase Activities from Fusarium verticillioides for Simultaneous Saccharification and Fermentation of Sugarcane Bagasse. Appl Biochem Biotechnol 172, 1332–1346 (2014). https://doi.org/10.1007/s12010-013-0572-9
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DOI: https://doi.org/10.1007/s12010-013-0572-9