School of Environment Science and Technology, Tianjin University, Tianjin, 300072, China.
Appl Biochem Biotechnol. 2011 Jul;164(6):918-28. doi: 10.1007/s12010-011-9184-4. Epub 2011 Feb 12.
Corn stover silage is an attractive raw material for the production of biofuels and chemicals due to its high content of carbohydrates and easy degradability. The effects of Fe(NO(3))(3) pretreatment conditions on sugar yields were investigated for corn stover silage. In addition, a combined severity factor was used to evaluate the effect of pretreatment conditions on the concentration of total sugars and inhibitors. Optimum pretreatment condition was obtained at 150 °C for 10 min with 0.05 M Fe(NO(3))(3), at which the yields of soluble xylose and glucose in liquid achieved 91.80% of initial xylose, 96.74% of initial arabinose and 19.09% of initial glucose, respectively, meanwhile, 91.84% of initial xylose, 98.24% of initial arabinose, and 19.91% of initial glucose were removed. In addition, a severity analysis showed that the maximum sugar concentration of 33.48 g/l was achieved at combined severity parameter value of 0.62, while the inhibitor concentration was only 0.03 g/l. Fe(NO(3))(3) is an effective catalyst to enhance hemicellulose hydrolysis in corn stover silage, the yields of monomeric xylose in the liquid fraction reached as high as 91.06% of initial xylose and 96.22% of initial arabinose, respectively.
玉米秸秆青贮是生产生物燃料和化学品的有吸引力的原料，因为它含有丰富的碳水化合物，易于降解。本研究考察了 Fe(NO3)3预处理条件对玉米秸秆青贮中糖产量的影响。此外，还采用综合严重度因子来评价预处理条件对总糖和抑制剂浓度的影响。在 0.05 M Fe(NO3)3、150°C、10 min 的最佳预处理条件下，液体中可溶性木糖和葡萄糖的收率分别达到初始木糖的 91.80%、初始阿拉伯糖的 96.74%和初始葡萄糖的 19.09%，同时，初始木糖、阿拉伯糖和葡萄糖的去除率分别为 91.84%、98.24%和 19.91%。此外，严重度分析表明，在综合严重度参数值为 0.62 时，可获得最大糖浓度 33.48 g/l，而抑制剂浓度仅为 0.03 g/l。Fe(NO3)3是增强玉米秸秆青贮中半纤维素水解的有效催化剂，液体馏分中单糖木糖的收率高达初始木糖的 91.06%和初始阿拉伯糖的 96.22%。
