How to make dietary fiber from corn hulls

发布时间：2020-04-19 点击次数：

The main equipment for producing food fiber from corn hulls is a grinder, a grading screen, a soaking tank, a filter and a dryer. The methods of making dietary fiber include crude separation method, chemical analysis method, membrane separation method and chemical reagent and enzyme combined separation method. Among them, the chemical analysis method is more commonly used, and the chemical analysis method includes the alkali treatment method and the acid-base treatment method. The following describes the process flow and operation points of the acid-base treatment method for preparing food fiber.

Acid and alkali treatment process. Cornhide—Rinse—Alkaline immersion for one hour—Rinse to neutral—Soak at 60 ° C for two hours—Rinse to neutral—Filter—Dry—Grinding—Sieving—Semi-finished product—Bleaching—Rinse—Dry—Crush —Finished products.

Key points of operation: In addition to the acid and alkali concentration required by the above process flow, it is mainly to master the decolorization of the finished product. The best conditions for decolorization of corn fiber are: temperature 55 ℃, decolorization time of two hours, 30% hydrogen peroxide consumption of 5%, corn starch produced by the by-product of starch factory as raw material, corn fiber produced by this process It is light yellow, water holding capacity, moderate swelling power, contains a certain amount of hemicellulose, pectin, protein, etc. The specific content is as follows: moisture 2.3%, crude fiber 12.3%, pectin 2.28%, 1.77% protein, 3.12% starch, 2.27% ash.

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