Fruit residue dietary fiber and preparation method thereof

Abstract

The invention discloses fruit residue dietary fiber and a preparation method thereof. According to the preparation method, fruit peel residues and fruit flesh residues produced in the processing processes of fruit juice and fruit cans are taken as raw materials and prepared into a high-purity and high-physiological activity dietary fiber product by the process steps and equipment of impurity removal, ultrafine crushing, enzymolysis, centrifuging, concentrating, decoloring, ethanol precipitation, drying and the like. The product has the characteristics of high purity, high water holding capacity, strong swelling performance and the like.

Description

technical field [0001] The invention relates to a food nutritional ingredient, in particular to a pomace dietary fiber and a preparation method thereof. Background technique [0002] The complete processing of fruits has always been the goal that food processing companies hope to achieve. At present, the pomace produced by various fruit processing enterprises to produce products such as concentrated juice (pulp) and original juice (pulp), except that a small part is used for feed processing, most of the others are wasted and cause environmental pollution. Using pomace to produce dietary fiber and further processing pomace can increase the added value of fruit deep-processing products, extend the fruit processing industry chain, and realize the comprehensive utilization of resources. [0003] Dietary fiber is a food nutrient with health care functions. The American Association of Cereal Chemists (AACC) defines it as "the edible part of plants and similar carbohydrates, which...

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Problems solved by technology

[0005] At present, there are few domestic reports on the simultaneous extraction of soluble dietary fiber and insoluble dietary fiber from pomace. Patent 200810053270.3 extracts soluble and insoluble dietary fiber from peach residue, adopting the tradition of removing impurities and sterilization, heat preservation extraction, solid-liquid separation, concentration alcohol precipitation, and drying. The process obtains soluble peach dietary fiber and insoluble peach dietary fiber, but the yields are only 14.7% and 46% respectively; patent 201010110008.5 reports the separation of soluble dietary fiber and insoluble dietary fiber from seabuckthorn seed meal, which uses amylase and protease to remove impurities, High yield of insoluble dietary fiber (60%-70%) of seabuckthorn seeds is obtained, but the content of soluble dietary fiber is low (less than 10%); the patent publication number is CN 101695364 A discloses a kind of apricot dregs dietary fiber The preparation method, using cellulase and protease to prepare and separate soluble dietary fiber and insoluble dietary fiber, and studied the enzymatic hydrolysis conditions and H 2 o 2 The effect of decolorization conditions on product yield, but 5% to 7% concentration of H 2 o 2 May cause H in the product 2 o 2 residue, which is not conducive to safe use; CN101077182 discloses a preparation technology of bayberry pomace functional dietary fiber, which adopts the processes of drying, crushing, organic solvent extraction, cellulase enzymatic hydrolysis, alcohol precipitation and vacuum drying to produce apricot residue Soluble and insoluble dietary fiber, the yield of soluble dietary fiber can reach 28.30%, and the yield of insoluble dietary fiber can reach 62.40%. In addition, insoluble dietary fiber has high water holding capacity and swelling power, but the raw material is significantly increased by drying. Production consumes energy, thereby increasing production costs; the patent with the publication number CN101878910A discloses a preparation technology of soluble dietary fiber with a purity of 95%, which undergoes hydration, ozone decolorization, repeated adsorption and purification of various resins, and three-effect dehydration concentration Finally, after spray drying, the soluble dietary fiber with a purity of more than 95% is obtained. The goal is to obtain the soluble dietary fiber of polydextrose, and the production cost is relatively high.

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