Process for continuous extraction of buckwheat starch, buckwheat protein, flavone, and dietary-fiber from buckwheat

Abstract

The present invention is continuous water milling production process of extracting buckwheat starch, buckwheat protein, flavone and dietary fiber. Buckwheat is water soaked, milled into milk and separated in a horizontal sieve to obtain buckwheat slurry and buckwheat dreg; buckwheat slurry is separated continuously to obtain buckwheat starch-I, buckwheat starch-II, buckwheat protein-I, buckwheat protein-II and buckwheat protein-III; and buckwheat dreg is separated to obtain buckwheat protein-IV, flavone and dietary fiber. The present invention obtains eight kinds of product with high additional value from buckwheat, and the production process has less investment, high production efficiency, low cost, no environmental pollution and other advantages.

Description

technical field [0001] The invention relates to a process for deep processing of agricultural and sideline products, in particular to a continuous production process for extracting two types of buckwheat starch, four types of buckwheat protein, flavonoids and dietary fiber from sweet buckwheat and tartary buckwheat. Background technique [0002] Buckwheat is divided into two categories: sweet buckwheat and bitter buckwheat. Sweet buckwheat is mainly distributed in Northeast my country, Inner Mongolia, Shanxi, Shaanxi, Ningxia and other places. Tartary buckwheat is mainly distributed in the mountainous area of ​​Southwest my country, and its output ranks second in the world. Buckwheat is rich in starch, protein, flavonoids and dietary fiber, which can effectively lower cholesterol, inhibit body fat accumulation, lower blood sugar and urine sugar, and have certain prevention and auxiliary treatment for hypertension, cardiovascular disease, diabetes, etc., known as "longevity"....

AI Technical Summary

Problems solved by technology

The disclosed technology of the patent application documents such as application number 02153289.3 is: extract a kind of mixed buckwheat protein and starch from the buckwheat heart powder that removes the bran with the dry milling method, it is a kind of technique of discontinuous production, and the heart powder is used Alkaline extraction affects the quality of buckwheat starch

In addition, the protein paste is rinsed with regular water. Since the pH value is not within the range of the isoelectric point, the protein is easily soluble in water and rinsed off by water; No powder, low protein yield

The scope of use of mixing buckwheat protein and starch is small, and some have to be further separated, but the separation technology is difficult and the cost of investment equipment is high, which is not conducive to industrial mass production

[0003] Another application number is 02153288.5 The disclosed technology of the patent application document is: extract mixed buckwheat protein, flavonoids and dietary fiber from buckwheat bran by dry milling method, also exist protein cream and wash with conventional water, because the pH value is not at the isoelectric point Within the range, the protein is very soluble in water and is rinsed off by water; the solid content of the suspension prepared before spraying is 8-15%, the concentration is too low, and it cannot be sprayed into powder; the extracted mixed protein needs to be further separated according to needs, etc.

[0004] The above two patent applications disclose a discontinuous processing technology, which requires a large investment in equipment and a large amount of dust in the production process, which not only affects the production environment, but also has serious loss and low utilization rate

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