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Method for improving concentrated milk protein powder solubility through ion exchange decalcification

A technology of ion exchange and protein powder, applied in the field of milk powder processing, can solve the problems of low reconstitution degree, affecting product quality, poor storage stability, etc.

Inactive Publication Date: 2015-12-02
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high protein content of MPC, its storage stability is relatively poor, and the main problems in the application process are:
[0004] (1) The newly produced MPC has low solubility, and its solubility decreases rapidly during storage;
[0005] (2) The lower solubility will also affect other functional properties of MPC, which hinders its application in the food industry
For example, when MPC is used as a protein fortifier in the production of high-protein dairy products (such as yogurt and cheese), if its reconstitution degree is low, lumps will form in the final product, which will affect the quality of the product

Method used

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  • Method for improving concentrated milk protein powder solubility through ion exchange decalcification
  • Method for improving concentrated milk protein powder solubility through ion exchange decalcification
  • Method for improving concentrated milk protein powder solubility through ion exchange decalcification

Examples

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Effect test

Embodiment example 1

[0020] A kind of is with skimmed milk as raw material, utilizes the method for decalcification of strong acid type cation exchange resin to improve the solubility of MPC, and its specific process steps are as follows:

[0021] Take 40L of commercially available pasteurized skim milk and treat it with a polyethersulfone ultrafiltration membrane with a molecular weight cut-off of 10,000MWCO at a temperature of 35°C. Concentrate 4 times once, and its basic indicators can refer to Table 1. The retentate had a solids content of 9% and a pH of 7.0. Add 50-550g of strong-acid cation exchange resin Amberlite SR1LNa, after ion exchange treatment at room temperature for 2 hours, the pH value is 7.0-7.5, adjust the pH value to 7.0, and perform falling film evaporation at a temperature lower than 70°C to make the solid content 21%. Finally, the decalcified MPC is obtained by spray drying at an inlet temperature of 175°C and an outlet temperature of 75°C, and the final decalcification rat...

Embodiment example 2

[0029] A kind of with MPC redissolved product as raw material, utilizes the method for the decalcification of weak acid type cation exchange resin to improve the solubility of MPC, and its specific process steps are as follows:

[0030] Take 2kg of commercially available MPC dry powder and redissolve in 20L deionized water to prepare a concentrated milk protein solution with a solid content of 10% (w / v), stir in a constant temperature water bath at 50°C for 1 hour, and homogenize twice under a homogenizing pressure of 28Mpa. is 6.9. Add 150 g of weak acid type cation exchange resin Duolite Resin C433, and after ion exchange treatment at room temperature for 1.5 h, the pH value is 7.1. Adjust the pH to 6.9. Falling film evaporation is carried out at lower than 70°C to make the solid content 22%, and then spray-dried at 180 / 75°C, the decalcification rate reaches 15%.

Embodiment example 3

[0032] A kind of whole milk is used as raw material, utilizes the method for decalcification of strong acid type cation exchange resin to improve the solubility of MPC, and its specific process steps are as follows:

[0033] After removing fat from 80L of fresh whole milk, it is treated with polyethersulfone ultrafiltration membrane with a molecular weight cut-off of 10,000MWCO, and the ultrafiltration temperature is 35°C. The final concentration is 4 times, that is, the permeate volume is 60L, and the ultrafiltration is stopped when the concentrated milk protein retentate is 20L. The retentate had a solids content of 12% and a pH of 6.8. After adding 500 g of strong acid cation exchange resin Amberlite SR1LNa for ion exchange treatment for 3 hours, the pH value was 7.2, and the pH was adjusted to 6.8. Perform falling film evaporation at a temperature lower than 70°C to make the solid content 19%, and then spray dry at 175 / 80°C to obtain MPC dry powder, and the decalcificatio...

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Abstract

The invention relates to a method for improving concentrated milk protein powder solubility through ion exchange decalcification. Concentrated milk protein trapped fluid is obtained from raw material milk through ultrafiltration or milk protein concentrated liquid is obtained by directly dissolving concentrated milk protein powder sold in the market again, and ion exchange decalcification is carried out by adding cation exchange resin. The obtained decalcified milk protein concentrated liquid is sprayed and dried to obtain the decalcified concentrated milk protein powder. The decalcified concentrated milk protein powder has the advantages of being good in solubility and high in storage stability. Besides, 10-30% of the concentrated milk protein powder is decalcified, the solubility of the concentrated milk protein powder is greatly improved, and meanwhile certain nutrient value and functional properties such as gel property, emulsibility and foamability of the concentrated milk protein powder can be guaranteed. The concentrated milk protein powder decalcified partly can be used for producing high-quality cheese, high-protein yoghurt, protein nourishment and the like.

Description

technical field [0001] The invention relates to a method for improving the solubility of concentrated milk protein powder by ion exchange decalcification, belonging to the field of milk powder processing. Background technique [0002] Milk protein is widely used as an important protein ingredient in the food processing industry due to its good nutritional and functional properties. With the development of food processing technology, the types of milk protein products continue to increase. Among them, milk protein concentrate (MPC), a relatively new type of protein ingredient, is skim milk that is ultra-filtered and diafiltered, then concentrated by evaporation and sprayed. A class of high protein powders obtained by drying. Membrane separation is a green non-thermal processing technology that can maintain the original structure and properties of milk protein to the greatest extent. The dry basis protein content of MPC is between 50-85%, and its protein composition is almos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23J1/20A23C9/13A23C19/00
Inventor 周鹏刘大松徐雨婷李娟魏冠棉
Owner JIANGNAN UNIV
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