阅读说明：本技术 一种酶法制备具有良好膨胀性葛根膳食纤维的方法 (Method for preparing kudzu vine root dietary fiber with good expansibility by enzyme method ) 是由 龚建平 李梦楚 吴东 龙伟 于 2019-11-18 设计创作，主要内容包括：本发明公开了一种酶法制备具有良好膨胀性葛根膳食纤维的方法,利用α-淀粉酶、糖化酶混合酶酶解,再经过滤渣收集、漂白、清洗、烘干、粉碎并过100目筛,制得葛根膳食纤维成品。本发明能有效地提高葛根加工副产物综合利用率,并且提高葛根膳食纤维膨胀性,得到具有良好吸水能力,有减肥、改善肠道菌群等生理功能的葛根渣膳食纤维。(The invention discloses a method for preparing kudzu root dietary fiber with good expansibility by an enzyme method, which comprises the steps of carrying out enzymolysis by using α -amylase and diastase mixed enzyme, collecting filter residues, bleaching, cleaning, drying, crushing and sieving by a 100-mesh sieve to obtain a kudzu root dietary fiber finished product.)

1. A method for preparing radix puerariae dietary fiber by an enzyme method is characterized by cleaning radix puerariae residues to remove impurities, crushing by a tissue crusher, adding water and mixing, wherein the mass ratio of the water to the radix puerariae is 1:5-20, adding α -amylase and glucoamylase mixed enzyme, the mass ratio of α -amylase to the glucoamylase in the mixed enzyme is 1:1-5, the mixed enzyme accounts for 0.1-0.5% of the total solution by mass, carrying out enzymolysis at 50-70 ℃ for 1-3 hours, washing the filter residues to be neutral by using clear water after completion, adding papain accounting for 0.01-0.03% of the total solution by mass into the filter residues for enzymolysis, carrying out enzymolysis at 50-60 ℃ for 1-2 hours, washing the filter residues to be neutral by using water after completion, carrying out enzyme deactivation at 100 ℃ and keeping warm for 10-30 minutes, collecting, bleaching, cleaning, drying, crushing and sieving by using a 100-mesh sieve to obtain the finished radix puerariae dietary fiber.

2. The method for preparing the radix puerariae dietary fiber by the enzymatic method as claimed in claim 1, wherein the method comprises the following steps: the washing step after bleaching is repeated for more than three times until the filtrate is colorless.

3. The method for preparing the radix puerariae dietary fiber by the enzymatic method as claimed in claims 1-2, wherein the method comprises the following steps: the temperature in the drying step is controlled to be 70-90 ℃.

Technical Field

The invention relates to the technical field of food, in particular to a method for preparing kudzu root dietary fiber with good expansibility by an enzyme method.

Background

At present, 40 kilohm of kudzu roots planted in China are planted in China ². Millions of tons of kudzu vine root residues are produced every year according to million tons of kudzu vine root powder produced every year in China. The kudzu processing byproducts mainly comprise kudzu residues, waste water and the like left after kudzu starch extraction, most of the byproducts are directly discarded, so that resource waste is caused, the environment is polluted, the total amount of kudzu in China is huge, and the deep processing degree is low, so that the byproducts are not effectively utilized basically. Effectively comprehensively utilizes the pueraria processing by-product, changes waste into valuable and hasGood environmental and social benefits.

Most of the Chinese kudzu roots are used for making starch, a small amount of the Chinese kudzu roots are used for processing products such as beverages and yoghourt, and the rest kudzu residues are used for making paper and making feed, and a part of the Chinese kudzu roots are discarded. The kudzu vine root residue contains more than 70% of total dietary fiber and is a good natural dietary fiber source. The dietary fiber is a high molecular compound mainly comprising non-digestible polysaccharide, including pectin, cellulose, hemicellulose, lignin and the like, and also comprises modified polysaccharide, oligosaccharide and the like, which can not be digested and absorbed in the small intestine of human beings, but can be partially or completely fermented in the large intestine. Dietary fiber is a complex mixture, which can be classified into soluble dietary fiber and water-insoluble dietary fiber according to their solubility. The water-Insoluble Dietary Fiber (IDF) refers to a part of Dietary Fiber that is Insoluble in water and not digested and absorbed by enzymes of human digestive tract, mainly is a component of cell wall, and includes cellulose, lignin, vegetable wax, etc. Although dietary fiber cannot be digested and absorbed by digestive enzymes in human body, it is one of nutrients necessary for human body to balance dietary structure, and has completely different physiological actions with six nutrients of carbohydrate, fat, protein, vitamin, mineral and water, so it is called as 'seventh nutrient' by nutriologists. It has effects of retaining water, oil and water, swelling, etc., and has multiple biological functions, such as reducing cholesterol content in serum, preventing and treating cardiovascular diseases such as hypertension, heart disease, atherosclerosis, etc., reducing postprandial serum glucose level and insulin response, and regulating blood sugar level of diabetes patients.

The expansibility and the water holding capacity of the dietary fiber are important reference indexes reflecting the physiological activity of the dietary fiber, and the expansibility and the water holding capacity can increase the defecation speed and the defecation volume of a human body, shorten the retention time of excrement in an intestinal tract, reduce the stimulation of various carcinogens in the excrement on the intestinal wall, and simultaneously relieve the pressure of a urinary system, thereby relieving the symptoms of diseases such as nephrolithiasis and cystitis and quickly discharging poisons out of the body; it also has effects in improving intestinal tract, inducing satiety, and preventing obesity.

Disclosure of Invention

The invention aims to provide a method for preparing kudzu root dietary fiber with good expansibility by an enzyme method, which effectively improves the comprehensive utilization rate of kudzu root processing byproducts.

The purpose of the invention is realized as follows:

a method for preparing radix puerariae dietary fiber by an enzyme method comprises the steps of cleaning radix puerariae residues, removing impurities, crushing by a tissue crusher, adding water and mixing, wherein the mass ratio of the water to the radix puerariae is 1:5-20, adding α -amylase and glucoamylase mixed enzyme, the mass ratio of α -amylase to the glucoamylase in the mixed enzyme is 1:1-5, the mixed enzyme accounts for 0.1-0.5% of the total solution, performing enzymolysis at 50-70 ℃ for 1-3 hours, washing the filter residues to be neutral by using clear water, adding papain accounting for 0.01-0.03% of the total solution into the filter residues for enzymolysis, performing enzymolysis at 50-60 ℃ for 1-2 hours, washing the filter residues to be neutral by using water, performing enzyme deactivation at 100 ℃ for 10-30 minutes, collecting, bleaching, cleaning, drying, crushing and sieving by using a 100-mesh sieve to obtain the finished radix puerariae dietary fiber.

Further, the washing step after bleaching is repeated for more than three times until the filtrate is colorless.

Further, the temperature in the drying step is controlled to be 70-90 ℃.

The content of insoluble dietary fiber in the kudzu root residue is 50-80% by weight.

The obtained dietary fiber has good expansibility and water retention capacity, improves the physiological function of the dietary fiber, and has good effects of preventing intestinal diseases and inhibiting obesity.

Detailed Description

The present invention will be further described with reference to examples.