Abstract: The method of mixed acid hydrolysis was used to produce xylose from distiller's grains(DG),and the structural changes of DG during the production of xylose were investigated with X-ray diffraction(XRD) and scanning electronic microscopy(SEM).In order to improve the yield of xylose,the key parameters including temperature,mixed acid concentration,solid-liquid ratio and acid hydrolysis time were investigated by means of orthogonal test.The optimal levels for the highest yield of xylose were obtained under the conditions of temperature of 110℃,solid-liquid ratio of 1∶ 12(g∶ mL),mixed acid concentration of 1.5%,time of 145 min.The yield of xylose reached 61.24% under optimized conditions.Studies on the structure of DG during the production of xylose showed that the lignocellulosic structural changes undergone by acid hydrolysis were obvious.The disruption of lignocellulosic structure resulted in the increasing surface exposure and porosity of acid hydrolysis residues.The crystallinity of acid hydrolysis residues was increased by comparison of DG,as a result of the degradation of hemicellulose and the amorphous region of cellulose.
刘高梅,任海伟. 白酒丢糟酸水解制备木糖及其结构变化[J]. 食品与发酵工业, 2013, 39(03): 106-110.
Liu Gao-mei,Ren Hai-wei. Production of xylose from distiller's grains(DG) by acid hydrolysis and the structural change of DG[J]. Food and Fermentation Industries, 2013, 39(03): 106-110.
2013, Vol. 39 
