Studies On The Extraction Of Dietary Fiber From Apple Pomace

The technology conditions of dietary fiber were studied systematically in this dissertation. Apple pomace was used as raw material to extract soluble dietary fiber(SDF) and insoluble dietary fiber(IDF) by chemical way. In this way, raw material was used sufficiently, additive value was increased. Furthermore, the waste was changed into worthiness and the pollution problem was resolved.The effects of the raw material's size, acid type and concentration, liquid-to-solid ratio, reaction temperature and time on the yield of SDF-A were studied; The effects of lye concentration, liquid-to-solid ratio, reaction temperature and time on the yield of SDF-B were investigated; The effects of pH value, Hydrogen peroxide(H2O2) concentration, liquid-to-solid ratio, reaction temperature and time on the decoloration of IDF were studied; The orthogonal experiments were accomplished. At the end, the experiment was magnified primary at optimum technology conditions.Results show that the optimum conditions of SDF-A are as follows: raw material with 0.35 mm diameter, 3% hydrochloric acid, 80癈, 2.0h, with liquid-to-solid ratio of 15:1 mL/g. The optimum conditions of SDF-B are as follows: 8% sodium hydroxide, 90癈, 3.0h, with liquid-to-solid ratio of 8:1 mL/g. The optimum conditions of decoloration of IDF are as follows: pH=10.0, 25 'C , 2.Oh, 5% Hydrogen peroxide(H2O2), with liquid-to-solid ratio of 3:1 mL/g.SHI Hongbing (Applied Chemistry) Directed by professor SONG Jirong...