Analysis of the product streams obtained on butanosolv pretreatment of draff

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
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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.
Original languageEnglish
Article number105680
JournalBiomass and Bioenergy
Volume141
Early online date18 Aug 2020
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Sustainable chemistry
  • Biomass
  • Draff
  • ABE fermentation
  • Hemicellulose

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