title: Novel process for the coproduction of xylo-oligosaccharides, fermentable sugars, and lignosulfonates from hardwood.
abstract: Many biorefineries have not been commercialized due to poor economic returns from final products. In this work, a novel process has been developed to coproduce valuable sugars, xylo-oligosaccharides, and lignosulfonates from hardwood. The modified process includes a mild autohydrolysis pretreatment, which enables for the recovery of the xylo-oligosaccharides in auto-hydrolysate. Following enzymatic hydrolysis, the residue is sulfomethylated to produce lignosulfonates. Recycling the sulfomethylation residues increased both the glucan recovery and lignosulfonate production. The glucose recovery was increased from 81.7% to 87.9%. Steady state simulation using 100g of hardwood produced 46.7g sugars, 5.9g xylo-oligosaccharides, and 25.7g lignosulfonates, which were significantly higher than that produced from the no-recycling process with 39.1g sugars, 5.9g xylo-oligosaccharides, and 15.0g lignosulfonates. The results indicate that this novel biorefinery process can improve the production of fermentable sugars and lignosulfonate from hardwood as compared to a conventional biorefinery process.
authors.affiliation: Co-Innovation Center for Efficient Processing and Utilization of Forest Products, Nanjing Forestry University, Nanjing 210037, China; Department of Forestry Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA.
authors.forename: Caoxing
authors.initials: C
authors.lastname: Huang
authors.affiliation: Department of Forestry Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA.
authors.forename: Ben
authors.initials: B
authors.lastname: Jeuck
authors.affiliation: Department of Forestry Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA.
authors.forename: Jing
authors.initials: J
authors.lastname: Du
authors.affiliation: Co-Innovation Center for Efficient Processing and Utilization of Forest Products, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Yong
authors.affiliation: Department of Forestry Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA.
authors.forename: Hou-Min
authors.initials: HM
authors.lastname: Chang
authors.affiliation: Department of Forestry Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA. Electronic address: jameel@ncsu.edu.
authors.forename: Hasan
authors.initials: H
authors.lastname: Jameel
authors.affiliation: Department of Forestry Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC 27695-8005, USA.
authors.forename: Richard
authors.initials: R
authors.lastname: Phillips
mesh_terms: D002241:Carbohydrates; D005947:Glucose; D006868:Hydrolysis; D008031:Lignin / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000378:metabolism; D031317:Liquidambar; D009844:Oligosaccharides / Q000302:isolation & purification* / Q000378:metabolism; D059027:Recycling; D014934:Wood / Q000378:metabolism*
chemical_list: D002241:Carbohydrates; D009844:Oligosaccharides; C001545:lignosulfuric acid; D008031:Lignin; D005947:Glucose
keywords: Coproduction; Fermentable sugar; Lignosulfonate; Xylo-oligosaccharide