Journal
BIORESOURCE TECHNOLOGY
Volume 175, Issue -, Pages 195-202Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.10.087
Keywords
Sugarcane bagasse; Steam explosion; Phosphoric acid; Enzymatic hydrolysis; High total solids
Funding
- National Council for Scientific and Technological Development of Brazil (CNPq) [551404/2010-8]
- Araucaria Foundation [3572013_35356]
- INCT in Energy Environment
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Hydrolysis of phosphoric acid-impregnated steam-treated sugarcane bagasse was pre-optimized using a face-centered central composite design in which the process variables were the substrate total solids (TS, %), agitation intensity (AI, rpm) and enzyme loading (EL, g g(-1)). Pretreatment was carried out at 180 degrees C for 10 min using cane bagasse with 50 wt% moisture content containing 9.5 mg of H3PO4 per gram of dry biomass. Hydrolyses were performed for 96 h at 50 degrees C using Cellic CTec2(R) and water-washed steam-treated substrates. The highest amount of fermentable sugars was obtained with 20 wt% TS, producing 76.8 g L-1 of glucose equivalents, which corresponded to a total glucan conversion of 69.2 wt% and to a theoretical net increase of 39% in ethanol production from the same sugarcane tonnage without considering the use of leaves, tops and the additional yields from C5 sugars. (C) 2014 Elsevier Ltd. All rights reserved.
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