Study On Production Xylose From Corncob By Acid Hydrolysis Preparation Technology And Compositon Test Of Dietary Fiber Capasules

Xylose is a non-calorie sugar, which can’t be metabolized in vivo. It applies topatients with diabetes and a sweet tooth who worry about the fat. Xylose can regulatehuman intestinal micro-environment, reduce blood fat and sugar steroids, it also canprevent caries and colorectal cancer. For xylose research has become a hot topic athome and abroad. Key factors in xylose production, such as acid hydrolysis process ofcorncob and xylose purification were investigated in this work.In order to reduce the protein of corncob, two kinds of preprocessing methodswere compared．The results showed that the content of protein of corncob wasreduced to0.988%with distilled water preprocessing. The optimal kinetic parametersfor hydrolysis through single-factor test were concentration of H2SO4of1.5%,hydrolysis reaction time of3h and the ratio of solid/liquid of1:13. As there waspigment in acidolysis process of corncob, this experiment, the activated carbon wasused to remove part of the pigment in the hydrolyzation. At the same time,001×12（strongly acidic styrene resin sulfonate cation exchange resin） and AH-1（melamine–guanidine-formaldehyde resin condensation of weakly basic anion exchange resin）were used to remove the ions in the hydrolyzation, the results showed that these tworesin could effectively remove the Ca²⁺, Fe²⁺, and SO4²⁺in the hydrolyzation.In addition to xylose, there was a little glucose existed in hydrolysis process ofcorncob. As were similar in nature, it’s difficult to remove these two monosaccharides.Saccharomyces cerevisiae were used to metabolize glucose in the hydrolyzation. Theresults show that it’s a feasible method to remove glucose in the hydrolyzationwithout the introduction of other impurities. The experiment also carried out someexploration of optimization, and ultimately to obtain a xylose yield of1.5%,90%purity.The research work developed a more convenient and effective process to producexylose by acidolysis of corncob, showing significant social and economic value.Shiitake stem contains large amounts of dietary fiber, and selenium, zinc, ironand other trace elements beneficial to humans, this study developed a moreconvenient process to produce health care products suitable for consumption by all groups with mushroom, with certain economic and social value.