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Polypeptide chelate calcium preparation and preparation method thereof

A technology of polypeptide chelated calcium and chelated calcium, which is applied in the protein composition of eggs, food science, protein food composition, etc. Effect

Active Publication Date: 2015-09-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the recovery and utilization of eggshells in industrial production has been relatively extensive, but there are still relatively few domestic eggshell membranes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation step of polypeptide chelated calcium is as follows:

[0016] (1) Shell membrane separation

[0017] Stir and wash the eggshell material from poultry egg processing waste with water to remove surface impurities and residual egg liquid, then drain the water, place it in an oven at 70°C for 40 minutes to dry, and then use a pulverizer to coarsely pulverize it, with a particle size of ≤5mm, to obtain Shell membrane mixture; then stir the shell membrane mixture in clear water for 30 minutes to separate the eggshell and egg membrane by flotation under the action of stirring, the egg membrane floats in the upper layer of water, and the eggshell sinks in the lower layer, thus sorting out Eggshells and egg membranes; the eggshells and egg membranes are sorted out; and the sorted eggshells and egg membranes are placed in an oven at 70°C for 2 hours to obtain dried eggshells and egg membranes for use.

[0018] (2) Eggshell superfine grinding

[0019] The eggshell i...

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Abstract

The invention relates to poultry egg shell membrane polypeptide chelate calcium and a preparation method thereof. The method comprises the following steps: using poultry egg processing scraps, namely egg shells, as raw materials; performing pretreatment, shell membrane separation by a mechanical method, egg shell ultramicro grinding and two-step egg membrane hydrolysis on the raw materials so as to obtain polypeptide; performing centrifugation and ultrafiltration on egg membrane hydrolysate so as to obtain polypeptide of which the molecular weight is smaller than or equal to 5000Da, and performing nano-filtration and desalination; mixing ultramicro egg shell powder with the polypeptide with the mass ratio of the ultramicro egg shell powder to the polypeptide to be 1:1-1:3; controlling definite temperature and time for performing chelation; and finally performing purification with ethanol of 90%-95%, and performing freeze drying so as to obtain the polypeptide chelate calcium. The polypeptide chelate calcium disclosed by the invention uses two kinds of natural substances of the poultry egg processing scraps, namely the egg shells and egg membranes, as the raw materials, the obtained polypeptide chelate calcium is safe and natural, the resource utilization of the poultry egg processing scraps, namely the egg shells and the egg membranes is realized, and the waste of resources is reduced.

Description

technical field [0001] The invention relates to the field of functional food processing, in particular to a polypeptide chelated calcium preparation and a preparation method thereof. Background technique [0002] my country is rich in poultry and egg resources and consumes a lot. With the increasing production and consumption of poultry eggs, its processing waste is also produced in large quantities. Poultry egg processing waste mainly includes two parts: eggshell and shell inner membrane. Among them, eggshells account for about 11% to 13% of the weight of whole eggs, and the main component is calcium carbonate (about 93%), which can be used to prepare medical calcium supplements such as calcium lactate, calcium propionate, calcium gluconate, calcium citrate, and calcium acetate. agents and food additives. The membrane accounts for about 4% to 5% of the weight of the whole egg, and contains about 90% of complex proteins mainly composed of keratin and mucopolysaccharides, ...

Claims

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Application Information

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IPC IPC(8): A23J1/08
Inventor 冉旭李静徐阳孙强曾里
Owner SICHUAN UNIV
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