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A method for preparing wheat bran dietary fiber from wheat bran

A technology for wheat bran dietary fiber and wheat bran, which is applied in the field of food processing, can solve the problems of low yield of water-soluble dietary fiber, single product, etc., and achieves the effects of easy large-scale popularization and application, simple process method, and improved economic benefits.

Active Publication Date: 2016-06-29
FARM PROD PROCESSING & NUCLEAR AGRI TECH INST HUBEI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art usually only adopts one extraction method, and there are technical problems such as single product and low yield of water-soluble dietary fiber

Method used

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  • A method for preparing wheat bran dietary fiber from wheat bran

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Embodiment 1

[0031] Example 1: A new method for preparing wheat bran dietary fiber using wheat bran as a raw material, the wheat bran dietary fiber is a dietary fiber rich in arabinoxylan, and the following process steps are sequentially performed using wheat bran as a raw material:

[0032] (1) Raw material pretreatment: After the wheat bran is ultra-finely crushed, it is passed through a 200-mesh sieve to obtain wheat bran powder, which is stored at room temperature for later use;

[0033] (2) Quick extraction with alkaline solution: Add the wheat bran micropowder from step (1) to alkaline solution for quick extraction to obtain a wheat bran suspension. The conditions for the quick extraction are: pH 13.0, material-to-liquid ratio 1:20 , The speed is 3000r / min, and the extraction time is 2.0min;

[0034] (3) Ethanol precipitation: Add absolute ethanol to the wheat bran suspension prepared in step (2) at a volume ratio of 4:1, stir and mix uniformly, centrifuge at 5000r / min for 10 minutes, colle...

Embodiment 2

[0039] Example 2: A new method for preparing wheat bran dietary fiber using wheat bran as a raw material. The wheat bran dietary fiber is a dietary fiber rich in arabinoxylan. The following process steps are sequentially performed using wheat bran as a raw material:

[0040] (1) Raw material pretreatment: After superfinely pulverizing wheat bran, pass a 100-mesh sieve to obtain wheat bran powder, which is stored at room temperature for later use;

[0041] (2) Quick extraction with alkaline solution: Add the wheat bran powder of step (1) to alkaline solution for quick extraction to obtain a wheat bran suspension. The conditions for the quick extraction are: pH 12.0, material-to-liquid ratio 1:15 , The speed is 6000r / min, and the extraction time is 1.0min;

[0042] (3) Ethanol precipitation: Add absolute ethanol to the wheat bran suspension prepared in step (2) in a volume ratio of 5:1, stir and mix well, centrifuge at 3000r / min for 20min, collect the precipitate and dry it for later u...

Embodiment 3

[0047] Example 3: A new method for preparing wheat bran dietary fiber using wheat bran as a raw material, the wheat bran dietary fiber is a dietary fiber rich in arabinoxylan, and the following process steps are sequentially performed using wheat bran as a raw material:

[0048] (1) Raw material pretreatment: the wheat bran is superfinely pulverized and passed through a 150-mesh sieve to obtain wheat bran powder, which is stored at room temperature for later use;

[0049] (2) Quick extraction with alkaline solution: Add the wheat bran powder of step (1) to alkaline solution for quick extraction to obtain a wheat bran suspension. The conditions for the quick extraction are: pH 11.0, material-to-liquid ratio 1:10 , The speed is 6000r / min, and the extraction time is 3.0min;

[0050] (3) Ethanol precipitation: Add absolute ethanol to the wheat bran suspension prepared in step (2) in a volume ratio of 3:1, stir and mix uniformly, centrifuge at 4000r / min for 20 minutes, collect the precipi...

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Abstract

The invention discloses a novel method for preparing wheat bran dietary fibers by taking wheat bran as a raw material. The wheat bran dietary fibers are dietary fibers enriched with araboxylan and the content is more than 16.08%. The novel method takes the wheat bran as the raw material and sequentially comprises the following process steps: pre-treating the raw material; rapidly extracting with an alkaline solution; carrying out ethanol precipitation; adding water to suspend again and blasting by steam; hydrolyzing compound protease; hydrolyzing compound amylase; carrying out secondary alcohol precipitation; and sieving. The dietary fiber product has high wheat bran dietary fiber yield and dietary fiber purity, and also has high content of araboxylan and high content of soluble dietary fibers; the product has good functional properties including water binding capacity, viscosity and the like, and has a plurality of physiological functions of relaxing bowel, controlling blood glucose, lowering blood fat, adjusting human immunity and preventing colon cancer and the like, so that high-quality raw material guarantees are provided for widely applying the wheat bran dietary fibers to foods.

Description

Technical field [0001] The invention relates to the technical field of food processing, in particular to a method for preparing dietary fiber rich in arabinoxylan by using wheat bran as a raw material. Background technique [0002] Wheat bran is a major by-product of wheat processing. Wheat bran mainly includes the epidermis, pericarp, seed coat, nacre layer and aleurone layer of the unused grains in processing, accounting for about 25% of the grain weight, which is produced in China every year There are 20 million tons of wheat bran. Wheat bran is mainly composed of dietary fiber, starch and protein. It also contains mineral elements such as phosphorus, potassium, sodium, magnesium, iron, zinc, selenium, copper, and manganese, as well as carotene and thiamine. , Riboflavin, niacin and other vitamins, of which dietary fiber accounts for about 45%-50%, starch accounts for about 15%-20%, and protein accounts for about 14%-18%. This shows that wheat bran is a renewable resource. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L33/22
Inventor 梅新何建军施建斌程薇蔡沙陈学玲关健张国真
Owner FARM PROD PROCESSING & NUCLEAR AGRI TECH INST HUBEI ACAD OF AGRI SCI
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