title: High glucose recovery from direct enzymatic hydrolysis of bisulfite-pretreatment on non-detoxified furfural residues.
abstract: This study reports four schemes to pretreat wet furfural residues (FRs) with sodium bisulfite for production of fermentable sugar. The results showed that non-detoxified FRs (pH 2-3) had great potential to lower the cost of bioconversion. The optimal process was that unwashed FRs were first pretreated with bisulfite, and the whole slurry was then directly used for enzymatic hydrolysis. A maximum glucose yield of 99.4% was achieved from substrates pretreated with 0.1 g NaHSO3/g dry substrate (DS), at a relatively low temperature of 100 °C for 3 h. Compared with raw material, enzymatic hydrolysis at a high-solid of 16.5% (w/w) specifically showed more excellent performance with bisulfite treated FRs. Direct bisulfite pretreatment improved the accessibility of substrates and the total glucose recovery. Lignosulfonate in the non-detoxified slurry decreased the non-productive adsorption of cellulase on the substrate, thus improving enzymatic hydrolysis.
authors.affiliation: Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China; Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, United States.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xing
authors.affiliation: Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China; State Grid Energy Conservation Service CO., LTD., Beijing Biomass Energy Technology Center, Beijing 100052, China.
authors.forename: Lingxi
authors.initials: L
authors.lastname: Bu
authors.affiliation: Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
authors.forename: Dafeng
authors.initials: D
authors.lastname: Sun
authors.affiliation: Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, United States.
authors.forename: Shijie
authors.initials: S
authors.lastname: Liu
authors.affiliation: Department of Chemistry and Chemical Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
authors.forename: Jianxin
authors.initials: J
authors.lastname: Jiang
mesh_terms: D005662:Furaldehyde / Q000378:metabolism*; D005947:Glucose / Q000302:isolation & purification*; D006868:Hydrolysis; D013447:Sulfites / Q000494:pharmacology*; D013500:Surface Tension / Q000187:drug effects; D001617:beta-Glucosidase / Q000378:metabolism*
chemical_list: D013447:Sulfites; D005662:Furaldehyde; D001617:beta-Glucosidase; D005947:Glucose; C042345:hydrogen sulfite
keywords: Bisulfite; Direct pretreatment; Enzymatic hydrolysis; Furfural residues; Lignosulfonate