Journal
FOOD CHEMISTRY
Volume 198, Issue -, Pages 125-131Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.09.108
Keywords
Bioethanol; Biorefining; FTIR; Pre-processing; Simultaneous saccharification and fermentation; Wheat bran
Funding
- Integrated Biorefining Research and Technology Club [BB/H004351/1]
- DEFRA/HGCA HOOCH Project [LK0848]
- Commission of the European Communities [245267]
- Biotechnology and Biological Sciences Research Council [BBS/E/F/00042576, 982612, BBS/E/F/00044476] Funding Source: researchfish
- BBSRC [BBS/E/F/00042576, BBS/E/F/00044476] Funding Source: UKRI
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Biorefining aims to exploit the full value of plant material by sequentially extracting and valorising its components. Many studies focus on the saccharification of virgin biomass sources, but it may be more efficient to pre-extract high-value components before hydrolysis to fermentable sugars. In the current study, a bran residue from de-starched, protein depleted and xylanase treated wheat bran has been subjected to hydrothermal pretreatment, saccharification and fermentation procedures to convert the residue to ethanol. The most effective pretreatment conditions (>190 degrees C, 10 min) and saccharification conditions were identified following bench-scale liquid hot water pretreatment. Pre-extraction of enzymatically-hydrolysable starch and xylan reduced the release of furfural production, particularly when lower pretreatment severities were used. Pilot-scale steam explosion of the lignocellulosic residue followed by cellulase treatment and conversion to ethanol at a high substrate concentration (19%) gave an ethanol titre of approximate to 25 g/L or a yield of 93% of the theoretical maximum. (C) 2016 Published by Elsevier Ltd.
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