title: Pretreatment of rice straw with ammonia and ionic liquid for lignocellulose conversion to fermentable sugars.
abstract: Pretreatment technology is a prerequisite to facilitate the release of sugars from a lignocellulosic biomass prior to fermentation. Recently, some pretreatment methods have been tried with ionic liquids, but they were still expensive and unpractical. In this study, an efficient pretreatment method using ammonia and ionic liquid was developed for the recovery of bio-digestible cellulose from a lignocellulosic byproduct, rice straw, and the increase of ionic liquid utilization. The combined use of ammonia and ionic liquid ([Emim]Ac) treatment exhibited a synergy effect for rice straw with 82% of the cellulose recovery and 97% of the enzymatic glucose conversion. This cooperative effect showed over 90% of the glucose conversion even with a reduced enzyme usage and incubation time. The ionic liquid was successfully recycled more than 20 times. The 20th-recycled ([Emim]Ac) showed 74% of the cellulose recovery and 78% of the glucose conversion to rice straw. Compared with the conventional pretreatment, our combined method for lignocellulosic biomass pretreatment was an economical and eco-friendly.
authors.affiliation: Department of Chemical Engineering, Sungkyunkwan University, Suwon, Republic of Korea.
authors.forename: Tam-Anh D
authors.initials: TA
authors.lastname: Nguyen
authors.forename: Kyoung-Rok
authors.initials: KR
authors.lastname: Kim
authors.forename: Se Jong
authors.initials: SJ
authors.lastname: Han
authors.forename: Hwa Young
authors.initials: HY
authors.lastname: Cho
authors.forename: Jin Woo
authors.initials: JW
authors.lastname: Kim
authors.forename: Sung Min
authors.initials: SM
authors.lastname: Park
authors.forename: Jae Chan
authors.initials: JC
authors.lastname: Park
authors.forename: Sang Jun
authors.initials: SJ
authors.lastname: Sim
mesh_terms: D000641:Ammonia / Q000494:pharmacology*; D001709:Biotechnology / Q000379:methods*; D050260:Carbohydrate Metabolism / Q000187:drug effects*; D002480:Cellulase / Q000378:metabolism; D003247:Conservation of Natural Resources; D005285:Fermentation / Q000187:drug effects*; D005947:Glucose / Q000378:metabolism; D052578:Ionic Liquids / Q000494:pharmacology*; D008031:Lignin / Q000378:metabolism*; D012275:Oryza / Q000187:drug effects*; D010316:Particle Size; D012995:Solubility / Q000187:drug effects; D013997:Time Factors
chemical_list: D052578:Ionic Liquids; C036909:lignocellulose; D000641:Ammonia; D008031:Lignin; D002480:Cellulase; D005947:Glucose