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Method for preparing soybean residue water soluble dietary fiber through microwave modification

A dietary fiber and microwave modification technology, which is applied in food preparation, food science, application, etc., can solve the problems of no theoretical basis, etc., and achieve the effects of easy automatic control, increase of soluble components, and increase of SDF content

Inactive Publication Date: 2012-10-03
JIANGSU SOUTH FOOD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although there is no complete theoretical basis for the mechanism of plant fiber microwave radiation treatment, it is still under further research.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Dry the fresh wet bean dregs so that its moisture content is less than 10%, crush it through a 40-mesh sieve for later use; weigh 20 g of dried bean dregs powder into a beaker, add 80 mL of 0.1% hydrochloric acid solution, and stir for 15 minutes; Put it into a microwave device for processing, the microwave power is 180W, and the processing time is 30min; add water to dilute to a mass concentration of 3% bean dregs liquid, adjust the pH value to 7.0 with a mass concentration of 5% sodium hydroxide solution, and filter to obtain a clear liquid; pass through 0.5Mpa nano The retentate was obtained by membrane desalination; vacuum drying and crushing gave 7.48 g of light yellow powder, and the yield of SDF was 37.4%.

Embodiment 2

[0030] Example 2: Dry the fresh wet bean dregs so that its moisture content is less than 10%, crush it through a 40-mesh sieve for later use; weigh 20 g of dried bean dregs powder into a beaker, add 200 mL of 2.5% sodium hydroxide solution, and stir for 25 minutes Put it into a microwave device for processing, the microwave power is 300W, and the processing time is 25 minutes; add water to dilute it into a 5% bean dregs liquid, adjust the pH to 6.8 with a 5% citric acid solution, and filter to obtain a clear liquid; pass through 1.0Mpa nanofiltration The retentate was obtained by membrane desalination; it was vacuum dried and crushed to obtain 5.84 g of light yellow powder, and the yield of SDF was 29.2%.

Embodiment 3

[0031] Example 3: Dry fresh wet bean dregs to make their moisture less than 10%, crush them through a 40-mesh sieve for later use; dry fresh wet bean dregs to make their water content less than 10%, crush them through a 40-mesh sieve for later use; weigh 20 g of dried bean dregs Put the bean dregs powder into the stirring device, add 340mL of 2% acetic acid solution in mass concentration, and stir for 45 minutes; put it into the microwave device for processing, the microwave power is 800W, and the processing time is 20 minutes; Adjust the pH to 7.0 with 5% citric acid solution, and filter to obtain the clear liquid; desalt through a 1.5Mpa nanofiltration membrane to obtain the retentate; vacuum-dry to obtain 6.5 g of light yellow powder, and the SDF yield is 32.5% after testing.

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PUM

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Abstract

The invention discloses a method for preparing a soybean residue water soluble dietary fiber through microwave modification. The method comprises the following steps of: treating fresh wet soybean residue serving as a raw material; hydrating; performing microwave treatment; dissolving in water to neutralize; filtering; and drying to prepare the water soluble dietary fiber. According to the method, the content of the water soluble dietary fiber in the soybean residue is greatly increased, and the functionality of the soybean residue is enhanced. The preparation method provided by the invention has the advantages of high efficiency, safety, easiness in automatic control, low equipment investment and operation cost and easiness and cleanness in operation and protection.

Description

technical field [0001] The invention relates to a method for preparing water-soluble dietary fiber through microwave modification by using bean dregs powder as raw material under catalysis. technical background [0002] Okara refers to the by-products in the process of producing soy products such as tofu and soy milk. During the processing of traditional soy products, under normal circumstances, about 7 kg of bean dregs can be produced per 10 kg of soybeans. It is estimated that about 2.8×lO 9 kg bean dregs. Okara is rich in nutrients and retains a large amount of protein, dietary fiber and other nutrients, especially the content of dietary fiber in the dry matter of okara can reach more than 50%. In recent years, people have gained a new understanding of bean dregs from the perspective of nutrition, especially in Japan, the United States, and Australia, the industrialization of various bean dregs foods has been realized. [0003] In recent years, there has been an upsur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/308A23L1/20A23L11/00
Inventor 张卫明陈新华覃旦文侯佳君陈亮朱昌玲孙达锋
Owner JIANGSU SOUTH FOOD TECH
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