Xylo-oligosaccharides, fermentable sugars, and bioenergy production from sugarcane straw using steam explosion pretreatment at pilot-scale. (August 2022)

• Record Type: Journal Article
• Authors: Brenelli, Lívia B.; Bhatia, Rakesh; Djajadi, Demi T.; Thygesen, Lisbeth G.; Rabelo, Sarita C.; Leak, David J.; Franco, Telma T.; Gallagher, Joe A.
• Is Part Of: Bioresource technology. Volume 357(2022)
• Publication Date: 2022-08
• Subjects: Sugarcane straw -- Steam explosion -- Xylo-oligosaccharides -- Biofuels -- Biorefining; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2022.127093
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: SE pretreatment is effective to produce low DP (2 to 6) XOS from SCS. Up to 35 % (w/w) of initial xylan in SCS can be recovered as high market value XOS. ∼50 % of the recovered XOS were xylobiose and -triose, known as important prebiotics. Up to 78 % enzymatic hydrolysis of glucan to glucose from SE pretreated SCS. The energy content of SE and enzymatically saccharified SCS increased by up to 16 %. 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.