title: Enhancement of enzymatic digestibility of Eucalyptus grandis pretreated by NaOH catalyzed steam explosion.
abstract: NaOH catalyzed steam explosion was applied to improve the enzymatic digestibility of Eucalyptus grandis. The impregnation of wood chip with NaOH solutions before steam explosion was carried out to investigate the effects of alkaline catalysis on solid recovery, enzymatic digestibility, and glucose recovery. The lignin removal was significantly affected by NaOH as a catalyst and the glucose recovery increased with increased severity index. The use of NaOH showed higher enzymatic digestibility than the use of water at most severity indexes due to the delignification of biomass and the increase of accessibility to cellulose of enzyme. The maximum glucose recovery was 65.55% having 4.4361 of severity index with 7wt.% of NaOH catalyzed steam explosion at 210°C during 9min. NaOH catalyzed steam explosion was effective to enhance the enzymatic digestibility due to the removal of lignin.
authors.affiliation: Clean Fuel Department, Korea Institute of Energy Research, Yuseong, Daejeon 305-343, Republic of Korea.
authors.forename: Ji-Yeon
authors.initials: JY
authors.lastname: Park
authors.forename: Minsu
authors.initials: M
authors.lastname: Kang
authors.forename: Jun Seok
authors.initials: JS
authors.lastname: Kim
authors.forename: Joon-Pyo
authors.initials: JP
authors.lastname: Lee
authors.forename: Won-Il
authors.initials: WI
authors.lastname: Choi
authors.forename: Jin-Suk
authors.initials: JS
authors.lastname: Lee
mesh_terms: D050260:Carbohydrate Metabolism / Q000187:drug effects; D002384:Catalysis / Q000187:drug effects; D002480:Cellulase / Q000378:metabolism*; D005052:Eucalyptus / Q000187:drug effects* / Q000378:metabolism*; D005947:Glucose / Q000378:metabolism; D006868:Hydrolysis / Q000187:drug effects; D008031:Lignin / Q000302:isolation & purification; D012972:Sodium Hydroxide / Q000494:pharmacology*; D013227:Steam; D001617:beta-Glucosidase / Q000378:metabolism*
chemical_list: D013227:Steam; D012972:Sodium Hydroxide; D008031:Lignin; D001617:beta-Glucosidase; D002480:Cellulase; D005947:Glucose