期刊
BIOMASS & BIOENERGY
卷 141, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2020.105680
关键词
Sustainable chemistry; Biomass; Draff; ABE fermentation; Hemicellulose
资金
- University of St Andrews Interdisciplinary PhD funding scheme
- EPSRC [EP/L016419/1]
- Leverhulme Trust Early Career Fellowship [ECF-2018-480]
- University of St Andrews
- Lignocellulosic Biorefinery Network (LBNet), a BBSRC [BB/L013738/1ss]
- BBSRC [BB/L013738/1] Funding Source: UKRI
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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