Journal
BIORESOURCE TECHNOLOGY
Volume 191, Issue -, Pages 312-321Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.05.024
Keywords
Sugarcane bagasse; Pretreatment; Enzymatic hydrolysis; High solids concentration; Hexoses fermentation
Funding
- CNPq - Brazil [141337/2011-7]
- FAPESP - Brazil [2008/57873]
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This work evaluated ethanol production from sugarcane bagasse at high solids loadings in the pretreatment (20-40% w/v) and hydrolysis (10-20% w/v) stages. The best conditions for diluted sulfuric acid, AHP and Ox-B pretreatments were determined and mass balances including pretreatment, hydrolysis and fermentation were calculated. From a technical point of view, the best pretreatment was AHP, which enabled the production of glucose concentrations near 8% with high productivity (3.27 g/L h), as well as ethanol production from 100.9 to 135.4 kg ethanol/ton raw bagasse. However, reagent consumption for acid pretreatment was much lower. Furthermore, for processes that use pentoses and hexoses separately, this pretreatment produces the most desirable pentoses liquor, with higher xylose concentration in the monomeric form. (C) 2015 Elsevier Ltd. All rights reserved.
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