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Title	Analysis of the product streams obtained on butanosolv pretreatment of draff
ID_Doc	29160
Authors	Foltanyi, F; Hawkins, JE; Panovic, I; Bird, EJ; Gloster, TM; Lancefield, CS; Westwood, NJ
Title	Analysis of the product streams obtained on butanosolv pretreatment of draff
Year	2020
Published
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 (R) CTec3 were used to hydrolyse selectively the glucose and xylose derived butyl beta-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.
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