酶法提取绿豆渣可溶性膳食纤维工艺条件的优化

Optimization on enzymatic extraction of soluble dietary fiber from mung bean residue

以绿豆渣为原料,研究了酶法提取绿豆渣可溶性膳食纤维(SDF)的关键技术,并采用正交试验方法优化了SDF的提取条件,测定了SDF的组成及功能性质。结果表明:酶法提取绿豆渣中SDF的最佳工艺条件为纤维素酶用量0.5%,pH5.0,提取温度55℃,提取1.0h;在此条件下,SDF得率可达21.072%,产品杂质含量低,持水力为4.857g/g,膨胀力为4.2mL/g。

Using mung bean residue as raw materials, an enzymatic extraction technology of soluble dietary fiber （SDF） were discussed in this paper. An extraction technology of SDF was optimized through orthogonal-test. The composition and functional properties of SDF were determined. The results showed that the optimum extraction conditions were cellulase enzyme dosage 0.5%, pH5.0, extraction temperature 55 ℃ and extraction time 1.0 h. The SDF’s yield was 21.072% under optimized extraction process with low levels of impurities. The water holding capacity and expansibility of SDF were 4.857 g/g and 4.2 mL/g respectively.