Analysis of the product streams obtained on butanosolv pretreatment of draff
Abstract
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.
Citation
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
Publication
Biomass and Bioenergy
Status
Peer reviewed
ISSN
0961-9534Type
Journal article
Description
The 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.).Collections
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