CaO／MgO复合固体碱预处理杂交狼尾草提高酶解率  

THE PRETREATMENT OF PENNISETUM HYBRID BY USING COMPOSITE SOLID BASE-CaO/MgO TO ENHANCE ENZYMATIC DIGESTIBILITY

作　　者：赵月[1,2] 谭雪松[1] 亓伟[1] 王琼[1] 庄新姝[1] 袁振宏[1] 

机构地区：[1]中国科学院广州能源研究所,中国科学院可再生能源重点实验室,广州510640 [2]中国科学院大学,北京100049

出　　处：《太阳能学报》2017年第5期1447-1452,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51476179;21476233);江苏省生物质能源与材料重点实验室开放基金(JSBEM201508);广东省自然科学基金(2015A030311022)

摘　　要：以杂交狼尾草为原料,采用CaO/MgO复合固体碱为催化剂,通过水相环境下高温处理,研究反应条件对狼尾草酶解效率及总糖收率的影响。研究结果表明:在催化剂含量20%,温度110℃,时间80min,固液比1∶20的条件下预处理狼尾草,木质素去除率高达54.18%。加酶量为40FPU/g,酶解72h,葡聚糖收率从未处理时的41.23%增大到81.04%;CaO/MgO固体碱预处理可破坏杂交狼尾草原本的致密结构,暴露更多的纤维素,破坏纤维素中的分子内和分子间的化学基团。CaO/MgO固体碱循环使用4次后无明显失活。The effects of the reaction conditions on enzymatic digestibility and total sugar yield of Pennisetum hybrid pretreated in high temperature aqueous environment with composite solid alkali-CaO/MgO as the catalyst are investigated in this paper. The results indicated that 20% catalyst content, 110 ℃, 80 min and 1 ： 20 ratio of solid are the optimal pretreatment conditions, whose lignin removal rate is up to 54.18%. When the enzyme loading is 40 FPU/g, 72 h enzymatic digestibility increases from 41.23% to 81.04%, substrates can be fully hydrolyzed. After pretreatment, the compact structure is damaged, more fibers expose, the chemical groups are destroyed like hydrogen bond in molecular. The catalysts CaO/MgO can be recovered and regenerated.

关 键 词：固体碱 酶解 杂交狼尾草 预处理 

分 类 号：TK6[动力工程及工程热物理—生物能]