大豆皮制备膳食纤维的研究

Preparation of Dietary Fiber by Soy Hull

以大豆皮为原料,用酶法、酸法和碱法制备膳食纤维。比较了各种方法的优缺点,酶法较优的工艺参数为:0.2%的中性蛋白酶液,水解温度35℃,水解时间1h,液料比6:1,得到的产品纤维含量为74.93%。酸法不适合膳食纤维的制备。碱法较优的工艺参数为:1.0%的氢氧化钠溶液,液料比6:1,100℃煮1h,得到的产品纤维含量为90.42%。

The preparation of dietary fiber based on soy hull with enzymic hydrolysis, acid hydrolysis and alkali dissolutionwas studied.The advantages and disadvantages of preparation method were compared, and then the optimum process param-eters were drawn. In enzymic hydrolysis, the optimum conditions were: 0.2 percent concentration of neutral protease,hydrolysis temperature 35℃,hydrolysis time 1h and the liquid to solid ratio 6:1.Under thes conditions, the product with 74.93 precent of crude fiber was obtained. Acid hydrolysis was not fit for the manufacture of dietary fiber acording to the qualityof final product. The optimum parameters of alkali dissolution were: 1.0 percent of sodium hydroxide, the liquid to solid ratio6:1, and cooking time 1h. Under these conditions, the final product of 90.42 percent of crude fiber was produced.