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Method for removing cadmium in rice proteins

A technology for rice protein and rice protein powder, which is applied in the field of food processing, can solve the problems of difficulty in meeting the requirements of rice protein products, high operation requirements, complicated separation and purification, etc., and achieves simple and efficient process operation suitable for large-scale production and promotion. The effect of removing cadmium

Inactive Publication Date: 2019-01-08
湖南汇升生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are some methods for removing cadmium in rice protein, such as using microbial fermentation to reduce the cadmium content in rice protein. This method has a better effect of removing cadmium, but the process is complicated, the stability is not good, and the subsequent separation and purification are cumbersome; Regulate the pH of the protein hydrolyzate, and reduce the cadmium content through the adsorption and replacement of strong acid cation exchange resin column. This method has high cost and high operation requirements, and it is difficult to realize large-scale production; Such treatment can achieve the purpose of reducing cadmium content. Although the effect is better, it will affect the quality of rice protein, and it is difficult to meet the requirements of rice protein products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Get the rice protein powder (1.07mg / kg) that cadmium content exceeds the standard, heat water to adjust slurry, mix, obtain the slurry that mass concentration is 10%;

[0032] (2) Pass the slurry obtained in step (1) through a colloid mill twice, and the particles of protein powder in the slurry after refining are less than 20 μm;

[0033] (3) Mix the slurry after refining in step (2) with the buffer solution of pH6 in a ratio of 1:3 by volume, stir for 1 hour at room temperature, and the rotating speed is 100rpm; during the stirring process, the microwave power is 3W / Under the power of g, intermittent heating is used for heating, heating for 3s, and stopping heating for 45s, which is a cycle;

[0034] (4) Put the mixture obtained in step (2) into a cadmium removal device to remove cadmium from rice protein, stir for 3 hours at 60 rpm, after the stirring, take out the polypropylene non-woven fabric sphere; the cadmium removal device is a cylindrical stainless steel...

Embodiment 2

[0039] (1) Get the rice protein powder whose cadmium content exceeds the standard (1.07mg / kg), heat water to adjust the slurry, mix well, and obtain a slurry with a mass concentration of 30%;

[0040] (2) Pass the slurry obtained in step (1) through a colloid mill twice, and the particles of protein powder in the slurry after refining are less than 20 μm;

[0041] (3) The slurry after step (2) refining is mixed with the buffer solution of pH6.5 in a ratio of 1:5 by volume, stirred for 2 hours at normal temperature, and the rotating speed is 200rpm; during the stirring process, the microwave power is Under the power of 4W / g, intermittent heating is used for heating, heating for 5s, and stopping heating for 60s, which is a cycle;

[0042] (4) Put the mixture obtained in step (2) into a cadmium removal device to remove cadmium from rice protein, stir at 100rpm for 3.5h, after the stirring finishes, take out the polypropylene non-woven fabric sphere; the cadmium removal device is ...

Embodiment 3

[0047] (1) Get the rice protein powder whose cadmium content exceeds the standard (1.07mg / kg), heat water to adjust the slurry, mix well, and obtain a slurry with a mass concentration of 20%;

[0048] (2) Pass the slurry obtained in step (1) through a colloid mill twice, and the particles of protein powder in the slurry after refining are less than 20 μm;

[0049] (3) Mix the slurry after refining in step (2) with the buffer solution of pH 6.8 in a volume ratio of 1:4, stir at room temperature for 1.5h, and the rotating speed is 150rpm; Under the power of 3W / g, intermittent heating is used for heating, heating for 5s, and stopping heating for 50s, which is a cycle;

[0050] (4) Put the mixture obtained in step (2) into a cadmium removal device to remove cadmium from rice protein, stir for 4 hours at 60 rpm, and after the stirring finishes, take out the polypropylene non-woven fabric sphere; the cadmium removal device is a cylindrical stainless steel Bucket with a height-to-di...

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Abstract

The invention discloses a method for removing cadmium in rice proteins and belongs to the technical field of food processing. Combined with a cadmium removal device, cadmium can be removed efficientlyby loading lactobacillus plantarum which has an adsorption function to cadmium by a polypropylene non-woven fabric. The method is simple to operate in process flow and relatively low in cost, the rice proteins with very low cadmium content can be obtained effectively, and the method is also suitable for scaled production and popularization.

Description

technical field [0001] The invention relates to a method for removing cadmium in rice protein, belonging to the technical field of food processing. Background technique [0002] Among cereal proteins, the biological value (B.V.) and protein value (P.V.) of rice protein are higher than other proteins. The amino acid composition of rice protein is balanced and reasonable, and the amino acid content is high, which is unmatched by other vegetable proteins. Rice protein is recognized as a high-quality food protein, which meets the ideal model recommended by WHO / FAO, and is very suitable as a protein supplement for the elderly, infants, and patients. Rice protein is mainly composed of four proteins: albumin, globulin, prolamin and glutenin. [0003] Due to environmental pollution, the rice protein made from rice now often contains heavy metals, especially cadmium, which seriously exceed the standard. Cadmium is a highly toxic heavy metal. When the cadmium content exceeds 1.0 mg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L5/20
CPCA23L5/273A23L5/28
Inventor 何球山张国军黄海军张兴祥
Owner 湖南汇升生物科技有限公司
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