Method for extracting soluble dietary fibers from kudzuvine root residues by extrusion and puffing assisted with enzymatic hydrolysis

Abstract

The present invention provides a method for extracting soluble dietary fibers from kudzuvine root residues by extrusion and puffing assisted with enzymatic hydrolysis. Compared with other conventionalmethods, the method is as follows: after a high-temperature short-time extrusion and puffing treatment, materials are subjected to a strong shearing action in an extruder cavity cylinder, a part of cellulose macromolecules are converted into soluble small molecules, parts of connection bonds of insoluble dietary fiber components are broken, the insoluble dietary fiber components are converted into the smaller soluble molecules, at the same time, a method combining a high-temperature cooking treatment, a steam explosion treatment and an ultrasonic treatment is conducted, and an extraction ratecan reach 50% or more and is significantly higher than that of the kudzuvine root residues not subjected to the extrusion and puffing treatment. A proportion of the soluble dietary fibers is improved and can better meet physiological needs of human body. The method is wide in application ranges, relatively low in cost and high in practicability, and realizes comprehensive utilization of a high added value product of the kudzuvine root residues. The method is prepared from the kudzuvine root residue by-product as the raw material and can reduce resource waste and environmental pollution.

Description

technical field [0001] The invention belongs to the field of functional food raw material processing, and relates to processing of soluble dietary fiber of kudzu root, in particular to a processing method for extracting soluble dietary fiber in kudzu root dregs through extrusion and expansion assisted by enzymatic hydrolysis. Background technique [0002] Dietary fiber is an important non-nutrient. It is a kind of indigestible part of carbohydrates such as non-starch polysaccharides and oligosaccharides. It can neither be digested and absorbed by the human gastrointestinal tract, nor can it produce energy. However, in recent years, more and more studies have shown that the intake of dietary fiber is closely related to human health, and adequate intake of dietary fiber will reduce the risk of constipation, obesity, diabetes, cardiovascular disease and intestinal cancer. For example, dietary fiber can absorb a large amount of water in the intestinal tract, keep the stool soft,...

AI Technical Summary

Problems solved by technology

[0004] Pueraria slag, which is the dregs of kudzu root after pressing, has a rough and hard texture. At present, most of the development of kudzu root products in China is to produce kudzu powder, kudzu root grains, kudzu root beverage, flavonoid extract and other products. After the active ingredients are extracted, the remaining kudzu root It is a pity that the slag is dumped as garbage