title: Significantly enhancing enzymatic hydrolysis of rice straw after pretreatment using renewable ionic liquid-water mixtures.
abstract: Pretreatment of rice straw by using renewable cholinium lysine ionic liquid ([Ch][Lys] IL)-water mixtures and subsequent enzymatic hydrolysis of the residues were conducted in this work. There is a clear correlation between the delignification capacity of the pretreatment solvent and its basicity. After pretreatment, surface area and pore volume of rice straw increased significantly, which substantially improved polysaccharides accessibility to enzymes and thus enhanced polysaccharides digestion. By carefully controlling the pretreatment severity (IL content, temperature and duration), loss of readily extractable xylan could be minimized. The sugar yields of 81% for glucose and 48% for xylose were achieved in the enzymatic hydrolysis of rice straw after pretreatment with 20% [Ch][Lys]-water mixture at 90 °C for 1 h. This pretreatment process is highly promising for industrial application because of high sugar yields, low energy input, short pretreatment time, and being environmentally benign and highly tolerant to moisture.
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China.
authors.forename: Xue-Dan
authors.initials: XD
authors.lastname: Hou
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.forename: Min-Hua
authors.initials: MH
authors.lastname: Zong
mesh_terms: D002480:Cellulase / Q000378:metabolism*; D006868:Hydrolysis / Q000187:drug effects; D052578:Ionic Liquids / Q000494:pharmacology*; D008031:Lignin / Q000302:isolation & purification; D012275:Oryza / Q000187:drug effects*; D013696:Temperature; D013997:Time Factors; D014242:Trichoderma / Q000201:enzymology; D014866:Waste Products / Q000032:analysis*; D014867:Water / Q000494:pharmacology*
chemical_list: D052578:Ionic Liquids; D014866:Waste Products; D014867:Water; D008031:Lignin; D002480:Cellulase