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

[Display omitted] •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...

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Bibliographic Details
Published in:Bioresource technology 2022-08, Vol.357, p.127093-127093, Article 127093
Main Authors: Brenelli, Lívia B., Bhatia, Rakesh, Djajadi, Demi T., Thygesen, Lisbeth G., Rabelo, Sarita C., Leak, David J., Franco, Telma T., Gallagher, Joe A.
Format: Article
Language:English
Subjects:
Biofuels
Biorefining
Steam explosion
Sugarcane straw
Xylo-oligosaccharides
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Summary:[Display omitted] •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 %. 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.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2022.127093