Xylo-oligosaccharides, fermentable sugars, and bioenergy production from sugarcane straw using steam explosion pretreatment at pilot-scale

Lívia B Brenelli, Rakesh Bhatia, Demi T Djajadi, Lisbeth G Thygesen, Sarita C Rabelo, David J Leak, Telma T Franco, Joe A Gallagher

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigated the production of xylo-oligosaccharides (XOS) from sugarcane straw (SCS) using steam explosion (SE) pretreatment at pilot-scale, as well as co-production of fermentable sugars and lignin-rich residues for bioethanol and bioenergy, respectively. SE conditions 200 °C; 15 bar; 10 min led to 1) soluble XOS yields of up to 35 % (w/w) of initial xylan with ∼50 % of the recovered XOS corresponding to xylobiose and xylotriose, considered the most valuable sugars for prebiotic applications; 2) fermentable glucose yields from the enzymatic hydrolysis of SE-pretreated SCS of up to ∼78 %; 3) increase in the energy content of saccharified SCS residues (16 %) compared to the untreated material. From an integrated biorefinery perspective, it demonstrated the potential use of SCS for the production of value-added XOS ingredients as well as liquid and solid biofuel products.

Original languageEnglish
Article number127093
JournalBioresource Technology
Volume357
Early online date1 Apr 2022
DOIs
Publication statusPublished - 31 Aug 2022

Keywords

  • Biofuels
  • Biorefining
  • Steam explosion
  • Sugarcane straw
  • Xylo-oligosaccharides

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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