Combination of hot compressed water treatment and wet disk milling for high sugar recovery yield in enzymatic hydrolysis of rice straw

• Published in: Bioresource technology 2012-01, Vol.104, p.743-748
• Main Authors: Hideno, Akihiro, Inoue, Hiroyuki, Yanagida, Takashi, Tsukahara, Kenichiro, Endo, Takashi, Sawayama, Shigeki
• Format: Article
• Language: English
• Subjects: arabinose; Autoclaving; Biorefineries; Carbohydrates - chemical synthesis; Combination of hot compressed water treatment and wet disk milling; Disks; Endo-1,4-beta Xylanases - chemistry; endo-1,4-beta-glucanase; enzymatic hydrolysis; Enzymes; Ethyl alcohol; Glucose; Hot Temperature; hot water treatment; Hydrolysis; Low cost enzyme; Oryza - chemistry; Plant Components, Aerial - chemistry; Pressure; production costs; raw materials; Rice; Rice straw; Straw; Water - chemistry; water treatment; Wavelength division multiplexing; wet milling; xylose
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2011.11.014

► HCWT-WDM pretreatment was examined to improve enzymatic digestibility of rice straw. ► The maximum sugar yield was obtained by WDM for 15 cycles following HCWT at 135°C. ► Combination of HCWT and WDM improved xylose yield as compared with only WDM. ► HCWT-WDM can reduce 19–67% of the enzymes cost for ethanol production. 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 70% xylose and 80% glucose yield. Economical analysis indicate that enzymes cost for ethanol production is reduced by 19–67% by WDM with HCWT.