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Method for removing lead and cadmium in peanut protein

A peanut protein and peanut protein powder technology, applied in food science and other directions, can solve the problems of walnut protein heavy metal enrichment, peanut heavy metal pollution, food safety impact, etc., and achieve the effects of mild operating conditions, high safety, and continuous operation.

Inactive Publication Date: 2017-02-15
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the pollution of agriculture by industry and mining, the problem of heavy metal pollution in peanuts has gradually been exposed.
The combination of lead, cadmium and walnut protein in the form of complexes leads to the accumulation of heavy metals in walnut protein, which affects its food safety

Method used

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  • Method for removing lead and cadmium in peanut protein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Take 100 kg of peanut protein powder, add 1000 kg of drinking water, and mix well; (2) Adsorption reaction: Slowly add 3.0mol / L sodium hydroxide to adjust the pH of the slurry to 9.5, and after the protein is completely dissolved, add 2.8 kg Insoluble dietary fiber (the mass ratio of cellulose and lignin is 2:1, and the average particle size is 950 mesh), mixed well, and kept at 50°C for 4.0 hours, stirring continuously at a stirring speed of 4000 rpm; (3) Solid-liquid separation: carry out solid-liquid separation, remove insoluble solids, and replace chelation with the protein slurry; (4) replace chelation: add 250 grams of zinc gluconate to the peanut protein slurry, stir at 40°C for 35 minutes, and the stirring speed is 2500 rpm / min; (5) pH adjustment: adjust the pH of the peanut protein slurry to 6.4 within 10 minutes; (6) Sterilization, dehydration and drying: the slurry is sterilized, then dehydrated and dried to obtain a peanut protein product.

Embodiment 2

[0019] (1) Take 100 kg of peanut protein powder, add 1000 kg of drinking water, and mix well; (2) Adsorption reaction: Slowly add 3.0mol / L sodium hydroxide to adjust the pH of the slurry to 9.5, and after the protein is completely dissolved, add 2.8 kg Insoluble dietary fiber (the mass ratio of cellulose and lignin is 2:1, and the average particle size is 950 mesh), mixed well, and kept at 50°C for 4.0 hours, stirring continuously at a stirring speed of 4000 rpm; (3) Solid-liquid separation: solid-liquid separation to remove insoluble solids; (4) pH adjustment: adjust the pH of the peanut protein slurry to 6.4 within 10 minutes; (5) Sterilization, dehydration and drying: the slurry is sterilized and then dehydrated and drying to obtain a peanut protein product.

Embodiment 3

[0021] (1) Take 100 kg of peanut protein powder, add 1000 kg of drinking water, and mix well; (2) Adsorption reaction: Slowly add 3.0 mol / L sodium hydroxide to adjust the pH of the slurry to 9.5. Keep stirring for 4.0 hours, during which the stirring speed is 4000 rpm; (3) pH adjustment: adjust the pH of the peanut protein slurry to 6.4 within 10 minutes; (4) Sterilization, dehydration and drying: the slurry is sterilized processed, then dehydrated and dried to obtain peanut protein products.

[0022] Effect analysis of different embodiments:

[0023]

[0024] Note: The higher the score of sensory quality, the better the taste

[0025] Compared with Examples 2 and 3, the contents of lead and cadmium in Example 1 processed by the present invention were reduced to 0.131 mg / kg and 0.029 mg / kg respectively; unanimous.

[0026] After the present invention adopts insoluble dietary fiber to carry out adsorption, the content of lead and cadmium decreases; continue to use zinc gl...

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PUM

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Abstract

The invention relates to a method for removing lead and cadmium in peanut protein. The method disclosed by the invention comprises the following steps of taking peanut protein powder, performing an adsorption reaction, performing solid-liquid separation, performing substitution and chelating, adjusting pH, performing sterilization, performing dehydration, performing drying and the like. According to the method disclosed by the invention, the contents of the lead and the cadmium in the peanut protein can be effectively and synchronously reduced, and besides, the feeling quality and the nutrient value of the peanut protein cannot be influenced.

Description

technical field [0001] The invention relates to a method for removing lead and cadmium from peanut protein, belonging to the field of agricultural product processing. Background technique [0002] Peanut protein has a good amino acid composition ratio, is an excellent plant protein, and has important utilization value. However, due to the pollution of agriculture by industry and mining, the problem of heavy metal pollution in peanuts has gradually been exposed. Lead, cadmium and walnut protein combine in the form of complexes, resulting in the accumulation of heavy metals in walnut protein, which affects its food safety. [0003] Lead and cadmium can accumulate in living organisms and seriously endanger human health. The interaction between lead and biomolecules in the body will damage reproductive, nervous, digestive, immune, kidney, cardiovascular and other systems, affecting growth and development. After being absorbed by the human body, cadmium will cause damage to co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L5/20A23L33/185
Inventor 潘军辉
Owner NANCHANG UNIV
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