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Method for removing heavy metal in rice protein

A technology of rice protein and rice protein powder, which is applied in the field of removing heavy metals in rice protein, can solve the problems of poor taste and flavor, low yield, etc., and achieve the effects of cost saving, simple operation and mild reaction conditions

Inactive Publication Date: 2015-06-03
NANCHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a method for removing heavy metals in rice protein, and improve the process of removing heavy metals in rice protein, so as to solve the problems of low yield and poor taste and flavor in the production process

Method used

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  • Method for removing heavy metal in rice protein
  • Method for removing heavy metal in rice protein
  • Method for removing heavy metal in rice protein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take rice protein powder, add hot water to make slurry, mix well to obtain a slurry with a concentration of 20%; put the slurry through colloidal milling twice; then pickle with citric acid, wherein 20mg of lemon is added to 1kg of rice protein raw materials acid; then the slurry is homogenized 2 times, the slurry is fully contacted with the weak acid to replace the metal cadmium, and then neutralized with sodium bicarbonate until the solution is neutral; the neutralized slurry is passed through a fixed bed of chelating agent, so that The metal cadmium is adsorbed by the chelating agent, and the concentration of the slurry filtered under the fixed bed is adjusted to 30%; high-temperature sterilization is carried out at a high temperature of 120 ° C, and the sterilization time lasts for 5 seconds; then the sterilized slurry is spray-dried, The feed rate during spray drying is 30ml / min, the inlet air temperature is 180°C, and the outlet air temperature is 70°C.

[0027] ...

Embodiment 2

[0029] Take rice protein powder, add hot water for pulping and mixing to obtain a slurry with a concentration of 35%; put the slurry through colloidal milling twice; then pickle with citric acid, wherein 20mg of lemon is added to 1kg of rice protein raw material acid; then the slurry is homogenized 3 times, the slurry is fully contacted with the weak acid to replace the metal cadmium, and then neutralized with sodium bicarbonate until the solution is neutral; the neutralized slurry is passed through a fixed bed of chelating agent, so that The metal cadmium is adsorbed by the chelating agent, and the concentration of the slurry filtered under the fixed bed is adjusted to 30%; high-temperature sterilization is carried out at a high temperature of 120 ° C, and the sterilization time lasts for 5 seconds; then the sterilized slurry is spray-dried, The feed rate during spray drying is 30ml / min, the inlet air temperature is 180°C, and the outlet air temperature is 70°C.

[0030]

Embodiment 3

[0032] Take rice protein powder, add hot water to make slurry, mix well to obtain a slurry with a concentration of 50%; put the slurry through colloid mill twice; then pickle with citric acid, wherein 20mg of lemon is added to 1kg of rice protein raw material acid; then the slurry is homogenized 2 times, the slurry is fully contacted with the weak acid to replace the metal cadmium, and then neutralized with sodium bicarbonate until the solution is neutral; the neutralized slurry is passed through a fixed bed of chelating agent, so that The metal cadmium is adsorbed by the chelating agent, and the concentration of the slurry filtered under the fixed bed is adjusted to 30%; high-temperature sterilization is carried out at a high temperature of 120 ° C, and the sterilization time lasts for 5 seconds; then the sterilized slurry is spray-dried, The feed rate during spray drying is 30ml / min, the inlet air temperature is 180°C, and the outlet air temperature is 70°C.

[0033]

[0...

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Abstract

The invention discloses a method for removing heavy metal in rice protein. The method comprises the following steps: modulating rice protein powder into pulp with the concentration being 10%-40%, and milling by a colloidal mill; carrying out acid pickling, homogenizing and neutralizing citric acid until the solution is neutral; putting pulp into a chelating agent fixing bed, adjusting the concentration of the pulp to be 20%-50%, sterilizing at the temperature of 100-130 DEG C for 3-10 seconds, and carrying out spray drying and the like. According to the invention, cadmium in the rice protein can be removed, the removal rate is greater than or equal to 90%, and the cadmium content is less than or equal to 0.2mg / kg; the appearance and the functional property of the rice protein are retained; a chelating agent can be recycled, and the cost is reduced; in the processing process, the content of other heavy metal (such as lead) cannot be increased; the method is simple to operate, is low in cost, can be used for safely and effectively removing cadmium in the rice protein, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of rice deep processing, and in particular relates to a method for removing heavy metals in rice protein. technical background [0002] Rice protein belongs to high-quality grain protein, has a good amino acid composition ratio, contains eight kinds of amino acids necessary for the human body, and has important utilization value. Rice protein has high biological value and excellent hypoallergenic characteristics, and is recognized as a high-quality vegetable protein. It is mainly composed of albumin, globulin, gliadin and gluten. [0003] Due to environmental pollution, the rice protein prepared from rice now often has the problem of heavy metals, especially cadmium, seriously exceeding the standard, which seriously endangers human health. Heavy metals entering the human body cannot be decomposed, and often take a period of time to accumulate to show toxicity and cause serious damage to the human liver, ki...

Claims

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Application Information

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IPC IPC(8): A23L1/015A23J3/14A23L5/20
Inventor 刘成梅罗舜菁钟俊桢伍立新陈林刘伟陈军钟业俊崔沙沙徐新凤
Owner NANCHANG UNIV
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