马来酸-碱联合预处理稻秆制备木糖和葡萄糖

Pretreatment of Rice Straw Using Maleic Acid Combined with Alkali for Recovery of Xylose and Glucose

以稻秆为原料,通过马来酸-碱联合预处理方法制备木糖和葡萄糖。在不同温度下比较了马来酸和硫酸对木糖回收率的影响,并对稻秆酸解后的残渣用碱脱木质素,最后进行纤维素酶水解,以释放葡萄糖。结果表明,当温度为150℃时,木糖的回收率最高,达72.12%。对稻秆的马来酸预处理残渣进行酶解,其葡萄糖得率仅为39.12%;在80℃下用2%NaOH对残渣脱木素处理12 h,酶解葡萄糖得率可提高到83.17%。

The aim is to recover xylose and glucose from rice straw by maleic acid combined with alkali pretreatment.The xylose recovery through maleic acid and sulfuric acid pretreatment of rice straw was compared under different temperatures.Then,the residue obtained after maleic acid pretreatment was delignified by alkali.Finally,the enzymatic hydrolysis of the residue was conducted to release glucose.The maximum xylose recovery reached 72.12%when the temperature was 150℃.Additionally,the enzymatic glucose yield was only 39.12%after enzymatic hydrolysis of the rice straw residue.However,the glucose yield increased to 83.17%after the residue was delignified by 2%NaOH at 80℃for 12 h.