Journal
BIORESOURCE TECHNOLOGY
Volume 263, Issue -, Pages 112-119Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.04.100
Keywords
Autohydrolysis; Lignocellulosic biomass; Enzymatic hydrolysis; Agave; Biorefinery
Funding
- Energy Sustainability Fund 2014-05 (CONACYT-SENER), Mexican Centre for Innovation in Bioenergy (Cemie-Bio), Cluster of Bioalcohols [249564]
- Mexican Science and Technology Council (CONACYT, Mexico) [INFR201601, 269461, 2015-01, 254808]
- Mexican Science and Technology Council (CONACY, Mexico) [582801/414478]
- Energy Sustainability Fund (CONACYT-SENER) [249564, 2014-05]
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The production of tequila in Mexico generates a large amount of agave bagasse per year. However, this biomass can be considered as a potential source for biofuel production. In this study, it is described how the hydrothermal pretreatment was scaled in a bench scale, considering the severity index as a strategy. The best condition was at 180 degrees C in isothermal regime for 20 min with 65.87% of cellulose content and high concentration of xylooligosaccharides (15.31 g/L). This condition was scaled up (using severity factor: [logR(0)] = 4.11), in order to obtain a rich pretreated solid in cellulose to perform the enzymatic hydrolysis, obtaining saccharification yields of 98.5 and 99.5% at high-solids loading (10 and 15%, respectively). The pre-saccharification and fermentation strategy was used in the bioethanol production at 10 and 15% of total pretreated solids, obtaining 38.39 and 55.02 g/L of ethanol concentration, corresponding to 90.84% and 87.56% of ethanol yield, respectively.
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