A kind of method utilizing rice dregs to extract high-purity starch

A high-purity, starch technology, applied in the field of rice deep processing, can solve the problem of insufficient high-purity starch, and achieve the effects of improving dissolution and efficiency

Active Publication Date: 2016-08-24
HEBEI STRONG FOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method for extracting high-purity starch using rice dregs in order to overcome the deficiency that the starch that needs to be extracted from rice protein at the same time is not high enough in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for extracting high-purity starch using rice dregs in this embodiment is characterized in that: the steps are:

[0033] (1) Refining: Soak the rice dregs in warm water at 50°C for 4 hours, remove the sand, remove the water through a sieve, pass through the grinding wheel mill and use wet grinding to refine the pulp instantly. After refining, the moisture reaches 80%, pass through a 60-mesh vibrating screen, and remove again sand;

[0034] (2) Ultrasonic treatment: Flow the rice milk in the above steps into the rice milk tank, and ultrasonically treat it for 20 minutes with a sound intensity of 360W / cm 2 , the ultrasonic equipment adopts the BILON 92-Ⅱ ultrasonic cell pulverizer of Shanghai Kehuai Instrument Co., Ltd.;

[0035] (3) One-time high-pressure homogenization: the rice slurry after ultrasonic treatment is processed instantaneously by a high-pressure homogenizer, and the cell structure is broken under a pressure of 30 MPa, and the particle size of the ...

Embodiment 2

[0043] A method for extracting high-purity starch using rice dregs in this embodiment is characterized in that: the steps are:

[0044] (1) Refining: Soak the rice dregs in warm water at 50°C for 4 hours, remove the sand, remove the water through a sieve, pass through the grinding wheel mill and use wet grinding to refine the pulp instantly. After refining, the moisture reaches 80%, pass through a 60-mesh vibrating screen, and remove again sand;

[0045] (2) Ultrasonic treatment: Flow the rice milk in the above steps into the rice milk tank, and ultrasonically treat it for 20 minutes with a sound intensity of 360W / cm 2 , the ultrasonic equipment adopts the BILON 92-Ⅱ ultrasonic cell pulverizer of Shanghai Kehuai Instrument Co., Ltd.;

[0046] (3) Primary high-pressure homogenization: the rice slurry after ultrasonic treatment is processed instantaneously by a high-pressure homogenizer, and the cell structure is broken under a pressure of 45MPa, and the particle size of the ri...

Embodiment 3

[0054] A method of utilizing rice dregs to extract high-purity starch of the present embodiment is characterized in that: the steps are:

[0055] (1) Refining: soak the rice dregs in warm water at 50°C for 4 hours, remove sand, sieve coarsely and remove water, and then use wet grinding for instant refining after grinding. sand;

[0056] (2) ultrasonic treatment: the rice milk in the above-mentioned steps was flowed into the rice milk tank, and the ultrasonic treatment was carried out for 20 minutes, and the sound intensity was 360W / cm 2 , the ultrasonic equipment adopts the BILON 92-Ⅱ ultrasonic cell crusher of Shanghai Kehuai Instrument Co., Ltd.;

[0057] (3) One-time high-pressure homogenization: the rice milk after ultrasonic treatment is instantaneously processed by a high-pressure homogenizer, and the cell structure is broken under the pressure of 55MPa, and the particle size of the rice milk is less than 3 microns;

[0058] (4) one-time centrifugal separation: the ric...

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Abstract

The invention discloses a method for extracting high-purity starch by using rice dregs, and belongs to the technical field of rice deep processing. In the present invention, the rice dregs are soaked in warm water, desanded, coarsely dewatered and refined, and then ultrasonic pretreatment is performed for 20 minutes, and the sound intensity is 360W / cm 2 ; Then after two instantaneous high-pressure homogenization treatments, the conditions are 30-55MPa and 22-25MPa respectively, all of which are centrifuged to obtain the lower heavy-phase starch liquid, and then use protease to hydrolyze a small amount of protein contained in the starch, and the enzymatic hydrolysis pH value is 8, The enzymolysis temperature is 50°C, the enzyme dosage is 200U / g starch, and the enzymolysis time is 30 minutes. After the enzyme is inactivated, it is concentrated and dried to obtain protein powder. The invention solves the problem in the prior art that the purity of the starch that needs to be extracted simultaneously from the rice protein is not high, and the prepared rice starch is highly pure.

Description

technical field [0001] The invention relates to the technical field of rice deep processing, in particular to a method for extracting high-purity starch from rice dregs. Background technique [0002] According to statistics, about half of the world's people eat rice as a staple food. Broken rice is an inevitable by-product of rice processing. However, at present, 20 million tons of broken rice per year in my country's rice processing has not been rationally and effectively utilized. The main component of rice It is starch and protein, and its content is about 80% and 8% respectively. The characteristics of small particle size and high specific surface area of ​​rice starch endow it with many physical and chemical properties superior to other starches. For example: it can be used as an additive without affecting the final flavor of the product; it can be used as a fat substitute in fat-free, low-fat food and cosmetics, etc. In addition, rice starch has many unique physiologi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B30/02C08B30/04C08B30/06
Inventor 王克铁王乐王欢王淮尚
Owner HEBEI STRONG FOOD
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