title: Sodium sulfite-formaldehyde pretreatment of mixed hardwoods and its effect on enzymatic hydrolysis.
abstract: In this work, mixed hardwoods were pretreated by sodium sulfite-formaldehyde (SF). The effects of SF pretreatment on the chemical compositions and enzymatic hydrolysis of mixed hardwoods were investigated. SF pretreatment temperature had a significant effect on pulp yield and delignification, resulting in an increased efficiency of enzymatic hydrolysis. After 96 h of enzymatic hydrolysis at the cellulase loading of 40 FPU/g substrate, the yields of glucan and xylan on the basis of original wood were 37% and 11% for the pulp produced with 12% sulfite charge at 170 °C for 2 h. The total sugar recovery based on the sugar in original wood was 74%. These results indicate that sulfite-formaldehyde cooking is of great potential to be a pretreatment method for a greenfield mill to produce fuel ethanol from hardwood.
authors.affiliation: Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China. yongcan.jin@gmail.com
authors.forename: Yongcan
authors.initials: Y
authors.lastname: Jin
authors.forename: Linfeng
authors.initials: L
authors.lastname: Yang
authors.forename: Hasan
authors.initials: H
authors.lastname: Jameel
authors.forename: Hou-min
authors.initials: HM
authors.lastname: Chang
authors.forename: Richard
authors.initials: R
authors.lastname: Phillips
mesh_terms: D050260:Carbohydrate Metabolism / Q000187:drug effects; D002480:Cellulase / Q000378:metabolism*; D005557:Formaldehyde / Q000494:pharmacology*; D005936:Glucans / Q000032:analysis; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D006868:Hydrolysis / Q000187:drug effects; D008031:Lignin / Q000378:metabolism; D013447:Sulfites / Q000494:pharmacology*; D013696:Temperature; D013997:Time Factors; D014934:Wood / Q000187:drug effects* / Q000378:metabolism*
chemical_list: D005936:Glucans; D013447:Sulfites; D005557:Formaldehyde; D008031:Lignin; D002480:Cellulase; C025026:sodium sulfite