Analysis of the product streams obtained on butanosolv pretreatment of draff

Foltanyi, Flora; Hawkins, Julie E.; Panovic, Isabella; Bird, Eve J.; Gloster, Tracey M.; Lancefield, Christopher S.; Westwood, Nicholas J.

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. M., Lancefield, C. S., & Westwood, N. J. (2020). Analysis of the product streams obtained on butanosolv pretreatment of draff. Biomass and Bioenergy, 141, https://doi.org/10.1016/j.biombioe.2020.105680

• Journal Article Type: Article
• Acceptance Date: Jul 7, 2020
• Online Publication Date: Aug 18, 2020
• Publication Date: 2020-10
• Deposit Date: Sep 15, 2020
• Journal: Biomass and Bioenergy
• Print ISSN: 0961-9534
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 141
• Article Number: 105680
• DOI: https://doi.org/10.1016/j.biombioe.2020.105680
• Keywords: Sustainable chemistry, Biomass, Draff, ABE fermentation, Hemicellulose
• Public URL: http://researchrepository.napier.ac.uk/Output/2686411