玉米芯
化学
纤维素酶
水解
木糖
酶水解
单糖
木二糖
半纤维素
食品科学
木聚糖
生物化学
有机化学
发酵
原材料
作者
Hong Liao,Yong Xu,Junhua Zhang
标识
DOI:10.1016/j.biortech.2021.125680
摘要
Xylooligosaccharides (XOS) are usually produced by xylan isolation from lignocellulose by alkaline followed by enzymatic hydrolysis, but the process is complicated. Recently acid hydrolysis for XOS preparation has become popular as it is faster and easier. This study investigated a novel strategy for producing XOS from corncob using propionic acid (PA) hydrolysis, then producing monosaccharides from solid residues by cellulase hydrolysis. The effect of alkaline post-treatment on enzymatic hydrolysis was studied. The maximum XOS yield of 68.5% was achieved using 5% PA at 170 °C for 50 min. About 84% of lignin in PA-hydrolyzed corncob was removed using alkaline post-treatment. The yields of glucose and xylose reached 89.8% and 80.1%, respectively, using 5 FPU cellulase/g dry matter. The results indicated that alkaline post-treatment reduced 50% cellulase loading and improved the saccharification of PA-hydrolyzed corncob. This study presents an innovative option for efficient production of XOS and monosaccharides from corncob.
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