Research on a Method of Xylan Preparation from Wheat Bran

Abstract:

This experiment mainly study the preparation of xylan from wheat bran. First of all，with the help of high speed grinding processing method to separate starch from the bran，then treated with cellulase and alkali soaking for recovering protein，finally by optimizing the optimum procedure to determine the best process for xylan. Experiment results show that the grinding time is 2 min，raw material particle size is in the range of >125 μm，starch yield is 72.43%；Optimum process conditions of cellulase and alkali treatment were that for：with enzyme was 1 mL/100 g bran，alkali treatment temperature was 60 ℃，alkali treatment was pH 9.5，under the condition of the xylan content is 35.5%，protein extraction rate was 74.9%.The best washing number is：4 times，the content of xylan under the condition is：36.5%.