不同预处理方法对玉米秸秆吐温-80/酶水解的影响

Effect of different pretreatment methods on enzymatic hydrolysis of corn stalk with added Tween-80

比较了稀硫酸、氢氧化钠、氨水和氢氧化钙4种预处理方法对玉米秸秆吐温-80/酶水解的影响,结果表明:氢氧化钠预处理方法效果最佳,得到的总还原糖产率比未处理时提高了10.7倍。其红外光谱和广角X-射线衍射谱图表明:经氢氧化钠预处理后,玉米秸秆中的木质素含量降低了62%,纤维素的结晶度也有所降低。

Four different pretreatment methods, namely, diluted sulfuric acid method, sodium hydroxide method, aqueous ammonia method and hydrated lime method, were tested to study the effect on enzymatic hydrolysis of corn stalk with added Tween-80. The results showed that the total reduced sugars of corn stalk treated by sodium hydroxide were 10.7 times more than those of the untreated corn stalk. As is shown by X-ray and IR, the lignin content of corn stalk treated by sodium hydroxide reduced by 62%. Besides, the degree of crystallinity of cellulose decreased.