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Method for preparing dietary fiber from bean dregs serving as raw material by combining steam explosion and enzymolysis

A technology of dietary fiber and bean dregs, which is applied in the direction of fermentation, etc., to achieve the effects of convenient production arrangement, good taste and small particle size

Inactive Publication Date: 2011-08-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention proposes a method for preparing mixed dietary fiber with high water-soluble dietary fiber content from bean dregs in order to overcome the deficiencies in the existing technology of producing dietary fiber from bean dregs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0052] Using bean dregs as raw materials, steam explosion combined with enzymolysis is used to produce pure natural mixed dietary fiber with high content of water-soluble dietary fiber. The operation steps are as follows:

[0053] 1).Using any one of the published bean dregs degreasing, protein removal and deodorization process to process the bean dregs to obtain pre-treated bean dregs;

[0054] 2). The pretreated bean dregs obtained in step 1) are subjected to steam explosion, the pressure of steam explosion is 1.6MPa, the temperature of the cylinder body is 350° C., and the ratio of material to water is 1:20 to obtain explosive bean dregs;

[0055] 3). Grinding the explosive bean dregs obtained in step 2) to more than 320 mesh to obtain bean dregs powder;

[0056] 4). Carrying out enzymatic hydrolysis of the bean dregs powder obtained in step 3), using cellulase for enzymatic hydrolysis. The preferred pH value is 5.0, the enzymolysis temperature is 45°C; the enzymolysis time ...

Embodiment 1-2

[0059] Using bean dregs as raw materials, steam explosion combined with enzymolysis is used to produce pure natural mixed dietary fiber with high content of water-soluble dietary fiber. The operation steps are as follows:

[0060] 1). Same as step 1) of Example 1-1, to obtain pre-treated bean dregs;

[0061] 2). Same as step 2) of Example 1-1, to obtain explosive bean dregs;

[0062] 3). Same as step 3) of Example 1-1 to obtain bean dregs powder;

[0063] 4). Carrying out enzymatic hydrolysis of the bean dregs powder obtained in step 3), using cellulase for enzymatic hydrolysis. The preferred pH value is 4.0, the enzymolysis temperature is 35°C; the enzymolysis time is 3h; the activity of the enzyme is 437.6U / g. Obtain enzymatic pulp after enzymatic hydrolysis;

[0064] 5). Spray-dry the enzymatic slurry obtained in step 4) until the water content is less than 10%, to obtain pure natural mixed dietary fiber with a water-soluble fiber content of 17.87%.

Embodiment 1-3

[0066] 1). Same as step 1) of Example 1-1, to obtain pre-treated bean dregs;

[0067] 2). Same as step 2) of Example 1-1, to obtain explosive bean dregs;

[0068] 3). Same as step 3) of Example 1-1 to obtain bean dregs powder;

[0069] 4). Carrying out enzymatic hydrolysis of the bean dregs powder obtained in step 3), using cellulase for enzymatic hydrolysis. The preferred pH value is 6.0, the enzymolysis temperature is 55°C; the enzymolysis time is 5h; the activity of the enzyme is 437.6U / g. Obtain enzymatic pulp after enzymatic hydrolysis;

[0070] 5). Spray-dry the enzymatic slurry obtained in step 4) until the water content is less than 10%, to obtain pure natural mixed dietary fiber with a water-soluble fiber content of 14.65%.

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Abstract

The invention discloses a method for preparing dietary fiber from bean dregs serving as a raw material by combining steam explosion and enzymolysis. In the method, a pure natural and fully water-soluble dietary fiber product is obtained through pretreatment of the bean dregs, steam explosion, ultrafine grinding, enzymolysis and drying of enzymolysis slurry. In the method, conversion rate of the soluble dietary fiber can be quickly and effectively increased by performing the steam explosion before the enzymolysis. Other chemical substances are not required to be added due to the adoption of the steam explosion, and the product is the pure natural dietary fiber. Cellulase, pectinase or xylanase can be separately used as an enzyme used in the method. Compared with a method for producing the fully water-soluble dietary fiber, the method for producing the mixed dietary fiber with high water-soluble dietary fiber content has the advantages of reduced investment, low production cost and capability of solving the problem of pollution of three wastes (waste water, waste gas and industrial residues).

Description

technical field [0001] The invention relates to a preparation method of dietary fiber. Specifically, it is a method for preparing dietary fiber by using bean dregs as raw material through steam explosion combined with enzymatic hydrolysis. The product prepared by the method is pure natural, highly water-soluble, superfine mixed dietary fiber or fully water-soluble dietary fiber. Background technique [0002] Okara is a by-product of the process of making soy milk or tofu. Studies have found that soybean cell walls contain about 50% hemicellulose and 20% cellulose. Therefore, soybean skin is an excellent source of dietary fiber. The total dietary fiber content in okara is more than 50%, but most of it is insoluble dietary fiber, and the content of water-soluble dietary fiber is relatively low. Okara also contains a small amount of fat and protein substances, and has a special beany smell. When producing dietary fiber, pretreatment is required to remove fat, protein substa...

Claims

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Application Information

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IPC IPC(8): C12P19/04
Inventor 李坚斌扈胜禄林莹柳嘉韦巧艳梁慧洋
Owner GUANGXI UNIV
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