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Method for producing rice starch by adopting enzyme method and product obtained by using method

A technology of rice starch and enzymatic method, applied in the field of rice starch, can solve the problems of ineffective separation of starch and protein, reduction of starch extraction rate and the like

Active Publication Date: 2012-09-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing researches, in the process of preparing rice starch by hydrolyzing protein with compound enzymatic method, since the rice starch granules are the smallest and the molecular weight of the protein is relatively large, after hydrolysis, the proportion of the large fragments of a part of the protein is close to that of the small granules of part of the starch. During flow separation, starch and protein cannot be separated effectively. In order to reduce the protein content in starch and obtain rice starch with better quality, it is necessary to remove protein as much as possible, and a certain amount of starch will be entrained in the separated protein, making starch The extraction rate is reduced

Method used

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  • Method for producing rice starch by adopting enzyme method and product obtained by using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Example 1: Method for improving the extraction rate of rice starch produced by enzymatic method of the present invention

[0083] The steps of this method are as follows:

[0084] (1) Broken rice pretreatment

[0085] Weigh 500 kg of early indica rice (starch content 76.5%), transport it to the soaking tank through a vibrating screen, iron remover, and bucket elevator, rinse the broken rice once with water according to the weight ratio of broken rice and water of 1:1, and discard the rice washing water , and then soak the broken rice with the same amount of water for 2.5 hours, and transport the soaked raw materials to a hammer mill through a stainless steel conveyor belt for coarse crushing to 60 mesh to obtain rice milk.

[0086] (2) Refining

[0087] The pulverized slurry is input into a colloid mill for grinding, and the ground rice slurry is passed through an 80-mesh centrifugal sieve, then water is added to adjust the weight percent concentration of the rice s...

Embodiment 2

[0096] Example 2: Method for improving the extraction rate of rice starch produced by enzymatic method of the present invention

[0097] The steps of this method are as follows:

[0098] (1) Broken rice pretreatment

[0099]Weigh 600kg of early indica rice (starch content 77.4%), transport it to the soaking tank through a vibrating screen, iron remover, and bucket elevator, rinse the broken rice once with water according to the weight ratio of broken rice and water of 1: 1.5, and discard the rice washing water , and then soak the broken rice with the same amount of water for 2 hours, and transport the soaked raw materials to a hammer mill through a stainless steel conveyor belt for coarse grinding to 60 mesh to obtain rice milk.

[0100] (2) Refining

[0101] The pulverized slurry is input into the colloid mill produced by Wenzhou Haolong Colloid Mill Factory Company for grinding, and the rice slurry after grinding is passed through an 80-mesh centrifugal sieve, and then w...

Embodiment 3

[0110] Example 3: Method for improving the extraction rate of rice starch produced by enzymatic method of the present invention

[0111] The steps of this method are as follows:

[0112] (1) Broken rice pretreatment

[0113] Weigh 800 kg of early indica rice (starch content 76.1%), transport it to the soaking tank through a vibrating screen, iron remover, and bucket elevator, rinse the broken rice once with water according to the weight ratio of broken rice and water of 1:2, and discard the rice washing water , and then soak the broken rice with the same amount of water for 3 hours, and transport the soaked raw materials to a hammer mill through a stainless steel conveyor belt for coarse crushing to 60 meshes to obtain rice milk.

[0114] (2) Refining

[0115] The pulverized slurry is input into a colloid mill for grinding, and the ground rice slurry is passed through an 80-mesh centrifugal sieve, then water is added to adjust the weight percent concentration of the rice s...

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Abstract

The invention relates to a method for improving the extraction rate of rice starch produced by using an enzyme method. The method comprises the steps of broken rice pretreatment, pulping, enzyme reaction, cyclone washing, dehydration, air flow drying and the like. The invention also relates to the rice starch obtained by the method. The starch granules are small, the starch has uniform granularity (2 to 8 microns) and complete structure, the protein content is less than or equal to 0.35 percent, the quality of the starch reaches American food and drug administration (FDA) standards, the extraction rate of the starch is more than or equal to 90 percent, and the starch can be widely applied in the industries of cosmetics, pharmacy, food, chemical industry and the like.

Description

【Technical field】 [0001] The invention belongs to the technical field of deep processing of rice. More specifically, the invention relates to a method for producing rice starch by enzymatic method, and also relates to the rice starch prepared according to the method. 【Background technique】 [0002] Rice starch is the main component in broken rice and exists in the form of starch granules in rice. Among all known grains, rice starch granules are the smallest, with a particle size of about 2 μm-8 μm, and most of them are irregular polygons with sharp edges and corners. The gelatinized rice starch absorbs water quickly, has a smooth texture like cream, and has a fatty taste. Based on these characteristics of rice starch, it can be used as cosmetic dusting powder, powder for photographic paper and glue for paper making, lubricant, sugar coating of candy and excipient of tablets, etc. Therefore, rice starch is widely used in food, pharmaceutical, chemical and other industries ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/04
Inventor 于秋生
Owner JIANGNAN UNIV
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