Institute of Nuclear Energy Research, Cellulosic Ethanol Project, Atomic Energy Committee, Executive Yuan, No. 1000, Wunhua Rd., Jiaan Village, Longtan Township, Taoyuan County 32546, Taiwan, ROC.
Bioresour Technol. 2010 Jul;101(13):4907-13. doi: 10.1016/j.biortech.2009.10.009. Epub 2009 Nov 17.
This study aim is to propose operational conditions for the dilute acid pretreatment of rice straw and to explore the effect of the structural properties of the solid residues on the enzymatic hydrolysis. A maximal sugar yield of 83% was achieved when the rice straw was pretreated with 1% (w/w) sulfuric acid with a reaction time of 1-5 min at 160 degrees C or 180 degrees C, followed by enzymatic hydrolysis. The completely release of sugar (xylose and glucose) increased the pore volume of the pretreated solid residues resulted in an efficiency of 70% for the enzymatic hydrolysis. The extra pore volume was generated by the release of acid-soluble lignin and this resulted in the enzymatic hydrolysis being enhanced by nearly 10%. The increase in the crystallinity index of the pretreated rice straw was limited. These results were consistent with those from the Fourier transformer infrared (FTIR) analysis.
本研究旨在提出稀酸预处理稻草的操作条件，并探讨固体残渣的结构特性对酶水解的影响。当稻草用 1%（w/w）硫酸在 160°C 或 180°C 下预处理 1-5 分钟，然后进行酶水解时，可获得 83%的最大糖产率。完全释放糖（木糖和葡萄糖）增加了预处理固体残渣的孔体积，导致酶水解效率达到 70%。额外的孔体积是由酸溶性木质素的释放产生的，这导致酶水解提高了近 10%。预处理稻草的结晶度指数增加有限。这些结果与傅里叶变换红外（FTIR）分析的结果一致。
