挤压豆渣中可溶性膳食纤维制备工艺的优化

为了获得碱法制备挤压豆渣中可溶性膳食纤维的最适工艺参数，以液固比、温度、时间和碱浓度为试验因子，以可溶性膳食纤维产率为响应值，采用中心旋转组合试验设计进行试验。结果表明：4个因素对可溶性膳食纤维产率的影响大小依次为碱浓度＞液固比＞温度＞时间。通过典型性分析得出可溶性膳食纤维最适制备条件为：液固比26∶1、温度89℃、时间68 min、碱浓度1.12%。在此条件下，可溶性膳食纤维产率的预测值为33.96%，验证试验所得可溶性膳食纤维产率为34.12%。回归方程的预测值和试验值差异不显著，所得回归模型拟合情况良好，达到设计要求。在本试验优化的条件下，以经挤压豆渣为原料制备的可溶性膳食纤维产率（34.12%）显著高于以未经挤压豆渣为原料的产率（13.51%）。

Optimization of technology for preparing soluble dietary fiber from extruded soybean residue

Optimized technology for preparing soluble dietary fiber from extruded soybean residue was studied by the central composite rotatable design with four variables of the ratio of liquid to solid,temperature,time and alkali concentration.The yield of soluble dietary fiber was the evaluation index.The results indicated that the effect order of four factors on the yield of soluble dietary fiber was as follows:alkali concentration,ratio of liquid to solid,temperature and time.The canonical analysis revealed that ...