title: Combination of hot compressed water treatment and wet disk milling for high sugar recovery yield in enzymatic hydrolysis of rice straw.
abstract: Rice straw has attracted significant interest in Japan as a potential raw material for biorefineries. Combination of hot-compressed water treatment (HCWT) and wet disk milling (WDM) was investigated to improve the enzymatic digestibility of rice straw and enhance sugar recovery yield. Rice straw, cut to <3 mm, was autoclaved at 121, 135, and 150 °C for 60 min, and subsequently treated by wet disk milling. WDM with HCWT at 135 °C for 60 min produced maximum xylose and glucose yields of 79% and 90%, respectively, at 10 FPU/g-substrate cellulase loading. Autoclaving at 150 °C leaked a 35% arabinose effluence in the liquid phase. Hydrolysis via WDM with HCWT required a lower enzyme loading (5 FPU/g-substrate) than either pretreatment process in isolation for >70% xylose and 80% glucose yield. Economical analysis indicate that enzymes cost for ethanol production is reduced by 19-67% by WDM with HCWT.
authors: Biomass Technology Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 3-11-32 Kagamiyama, Higashi-Hiroshima, Hiroshima 737-0046, Japan.
authors: Akihiro
authors: A
authors: Hideno
authors: Hiroyuki
authors: H
authors: Inoue
authors: Takashi
authors: T
authors: Yanagida
authors: Kenichiro
authors: K
authors: Tsukahara
authors: Takashi
authors: T
authors: Endo
authors: Shigeki
authors: S
authors: Sawayama
mesh_terms: D002241:Carbohydrates / Q000138:chemical synthesis*; D043364:Endo-1,4-beta Xylanases / Q000737:chemistry*; D006358:Hot Temperature; D006868:Hydrolysis; D012275:Oryza / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry*; D011312:Pressure; D014867:Water / Q000737:chemistry*
chemical_list: D002241:Carbohydrates; D014867:Water; D043364:Endo-1,4-beta Xylanases