Soya-dregs water-soluble diet fiber preparation method using ultrafiltration and spray drying

Abstract

The invention relates to a meal fiber, provides a method for preparing soybean residue water-soluble meal fiber by combining ultrafiltration and spray drying, which comprises: firstly, preparing insoluble soybean residue meal fiber; then, steaming, boiling and the insoluble soybean residue meal fiber, and modifying it by enzymatic hydrolysis; finally, performing ultrafiltration dialysis, concentrating and spray drying. The insoluble meal fiber crude product is prepared by degreasing and deproteinization treatment by using enzyme method and combined alkaline method; additionally, the insoluble meal fiber water-soluble modification is performed by high temperature steaming, boiling and combined cellulose hemicellulose enzymolysis. The combination of high temperature steaming, boiling and enzymolysis modification has the advantages of low enzyme amount, convenience, rapid and high conversion rate of soluble meal fiber; the spray drying performed directly after the ultrafiltration dialysis concentration can avoid the steps of vacuum condensation, alcohol precipitation and drying, saves time, saves process and reduces product cost largely.

Description

technical field [0001] The invention relates to a dietary fiber, in particular to a method for preparing high-purity soybean dregs water-soluble dietary fiber by means of ultrafiltration combined with spray drying. Background technique [0002] Dietary fiber has been recognized as the "seventh largest nutrient". Dietary fiber can be divided into water-soluble and insoluble dietary fiber according to solubility. Both have specific physiological functions and health care effects in the human body, but the specific functions are different. The role of insoluble components is considered to be mainly to produce mechanical peristalsis in the intestinal tract, which can prevent obesity, constipation, intestinal cancer, etc. Water-soluble ingredients have a greater role in promoting physiological metabolism, such as preventing gallstones, eliminating harmful metal ions, preventing diabetes, lowering serum and liver cholesterol, inhibiting postprandial blood sugar rise, and preventi...

AI Technical Summary

Problems solved by technology

The method has mild conditions, but as a biological fermentation method, the fermentation time is long (3-4 days), the quality is not easy to control, and there are certain problems in industrialization.

[0007] The Chinese patent application whose application number is 200610019590.8 has introduced a kind of grain dietary fiber production method with high water-soluble dietary fiber content, adopts inserting lactic acid bacteria to carry out fermentation, and the post-fermentation liquid is carried out homogenizing and directly spraying dry, and the water-soluble dietary fiber content of product is also low. Higher than 30%, the product particle size is less than 40μm, but there is also the problem of long fermentation time (2~12d)