The invention relates to a method for preparing
xylose by utilizing distiller's grains of Baijiuand belongs to the technical field of comprehensive utilization of byproducts in the
white spirit processing industry. The method for preparing the
xylose by utilizing the distiller's grains of the Baijiu comprises the following steps: pretreating the distiller's grains of the
white spirit, carrying out
acid hydrolysis on the distiller's grains of the Baijiu, carrying out alkali
hydrolysis on the distiller's grains of the
white spirit, regulating pH value of filtrate, carrying out low temperature enzymolysis, carrying out neutralizing treatment, carrying out
activated carbon decolouration, removing impurities in decolored solution, carrying out
ultrafiltration and
nanofiltration, concentrating and
drying. The method for preparing the
xylose by utilizing the distiller's grains of the white spirit has the advantages that
cellulose type materials in the distiller's grains of the Baijiu are comprehensively utilized, and
hemicellulose in the distiller's grains of the white spirit can be treated and converted into the xylose, so that a xylose product with high market value is obtained, the distiller's grains of the Baijiu can be effectively treated, and
solid waste substances in a white spirit enterprise production process are effectively utilized; meanwhile, a large amount of neutralizing
reagent can be saved,
process equipment and process cost can be reduced to the utmost extent without introducing a new substance, and product quality is high, so that the method for preparing the xylose by utilizing the distiller's grains of the Baijiu is applicable to industrial production.