Second-Generation Bioethanol Production through a Simultaneous Saccharification-Fermentation Process Using Kluyveromyces Marxianus Thermotolerant Yeast

Melchor Arellano-Plaza, Jorge A. Mejia-Barajas, Mariana Alvarez-Navarrete, Alfredo Saavedra-Molina, Jesus Campos-Garcia, Uri Valenzuela and Lorena Amaya-Delgado

A chapter in Special Topics in Renewable Energy Systems from IntechOpen

Abstract: Due to the present renewable fuels demand increase, reduction of second-generation bioethanol production cost is pursued, since it is considered the most promising biofuel, but not yet economically viable. A proposed solution is its production through a simultaneous saccharification and fermentation process (SSF); however, it is necessary to apply temperatures above 40°C, which reduce the viability of traditional ethanologenic yeasts. As consequence, the use of thermotolerant ethanologenic yeast has been suggested, among which the yeast Kluyveromyces marxianus stands out. This chapter addresses the production of second-generation bioethanol through the SSF process, emphasizing the potential of K. marxianus to transform lignocellulosic biomass as agave bagasse. As result, it is proposed to direct the second-generation bioethanol production to the SSF process employing thermotolerant yeasts, to increase process productivity, and addressing the economic barriers.

Keywords: bioethanol; simultaneous saccharification and fermentation (SSF); thermotolerant yeasts; Kluyveromyces marxianus; agave bagasse (search for similar items in EconPapers)
JEL-codes: Q20 Q40 (search for similar items in EconPapers)
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Persistent link: https://EconPapers.repec.org/RePEc:ito:pchaps:158809

DOI: 10.5772/intechopen.78052

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