Analysis of the product streams obtained on butanosolv pretreatment of draff
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The efficient use of biomass-derived waste streams from the food and drink industry is very important for achieving a circular economy. In this work, a pretreatment based on 1-butanol (butanosolv) was used to fractionate draff, a by-product from the brewing and distilling industries, leading to a solid pulp, a hemicellulose derived-fraction and a pseudo lignin. The pulp was enriched in glucans and showed a 4-fold improvement in enzymatic hydrolysis experiments relative to the starting biomass. The pulp could be fermented in an ABE process producing 32g/100g of solvents. The hemicellulose-derived fraction was analysed by 2D HSQC NMR and found to contain a mixture of predominantly butoxylated monosaccharides. The hydrolase enzymes present in Cellic® CTec3 were used to hydrolyse selectively the glucose and xylose derived butyl β-pyranose monomers. Alternatively, non-selective hydrolysis of both anomers was achieved using TFA/H2O giving native sugars for fermentation and recovered 1-butanol. A detailed characterization of the pseudo lignin was also achieved.
Foltanyi , F , Hawkins , J E , Panovic , I , Bird , E J , Gloster , T , Lancefield , C S & Westwood , N J 2020 , ' Analysis of the product streams obtained on butanosolv pretreatment of draff ' , Biomass and Bioenergy , vol. 141 , 105680 . https://doi.org/10.1016/j.biombioe.2020.105680
Biomass and Bioenergy
Copyright © 2020 Elsevier Ltd. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.biombioe.2020.105680
DescriptionThe authors would like to thank the University of St Andrews Interdisciplinary PhD funding scheme (F.F. studentship) and the EPSRC-funded CRITICAT Centre for Doctoral Training (studentship to I.P.; EP/L016419/1) for PhD funding. C.S.L. is funded by a Leverhulme Trust Early Career Fellowship (ECF-2018-480) and the University of St Andrews. This project was supported by a grant from the Lignocellulosic Biorefinery Network (LBNet), a BBSRC-funded Network in Industrial Biotechnology and Bioenergy (BBSRC NIBB) BB/L013738/1ss (N.J W., J.E.H and E.J.B.).
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