絮凝脱色在低聚木糖分离纯化中的应用

Application of Flocculant Decolorization in the Purification of Xylooligosaccharide

研究了 5种絮凝剂对低聚木糖水解液絮凝脱色效果的影响。结果表明 ,微生物絮凝剂NOC 1在用量为 2 0mg/L ,pH 6 5 ,温度 80℃及 5 0mmolAl3+ /L存在时 ,可除去约 86%的色素。利用絮凝结合活性炭脱色比单纯用活性炭脱色低聚木糖的损失减少约 83 9% ,活性炭用量减少 90 %。利用絮凝脱色生产的产品外观达到日本同类产品的水平 ,且产品中低聚木糖含量高于日本同类产品。

Effect of the decolorizing by five kinds of flocculant on the hydrolysate of xylooligosaccharides was studied The results showed that the microbial flocculant NOC 1 could remove 86% of total coloring matter from the hydrolysate under the concentration of 20?mg/L, pH 6 5, 80℃ in the presence of 50?mmol Al 3+ /L Compared to the process of decolorizing by active carbon used only, the active carbon used decreased 90% and the loss of xylooligosaccharides decreased 83 9% in the process of decolorizing by the combination of flocculant and active carbon The ratio of xylooligosaccharides to total sugar in the product is higher tha that in japanese product and its appearance achieved the same level of japanese product