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

Author(s)

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

• Document type: Journal article
• Source: Bioresource Technology; v. 357, p. 9-pg., 2022-08-01.

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 degrees C; 15 bar; 10 min led to 1) soluble XOS yields of up to 35 % (w/w) of initial xylan with similar to 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 similar 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. (AU)

• FAPESP's process: 20/01007-2 - Developing tailored lignin-based nanomaterials for environmental friendly applications within integrated biorefinery concept
• Grantee: Lívia Beatriz Brenelli de Paiva
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 15/50612-8 - An integrated approach to explore a novel paradigm for biofuel production from lignocellulosic feedstocks
• Grantee: Telma Teixeira Franco
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/15477-8 - Development of a low severity pretreatment process for the production of sugarcane straw oligosaccharides
• Grantee: Lívia Beatriz Brenelli de Paiva
• Support Opportunities: Scholarships in Brazil - Post-Doctoral