A method for judging the end point of donkey-hide gelatin blanching process based on electrical conductivity

A discriminant method, the technology of blanching donkey-hide gelatin skin, applied in the direction of material resistance, can solve the problems of inconsistent quality of donkey skin, inability to represent, and affect the production process, so as to avoid energy consumption and raw material loss, increase production capacity, and reduce process energy. consumption effect

Active Publication Date: 2016-12-28
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Too little blanching will not be able to wash the oil, salt and other impurities in the raw materials, which will affect the smooth progress of the subsequent production process. At the same time, the impurity content in the donkey-hide gelatin products will be too high, and the quality will not meet the standard
In addition, when estimating the impurity content of raw materials, only the raw materials piled on the outermost layer shall prevail. Even if the impurity content of these raw materials can be accurately estimated, it cannot represent the impurity content of all raw materials in this batch; The number of skins is not necessarily suitable for this batch of donkey skins, which will lead to inconsistent quality of different batches of donkey skins after blanching, which will cause unpredictable problems in the subsequent production process, and will also affect product stability. adverse effect on the quality of the product

Method used

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  • A method for judging the end point of donkey-hide gelatin blanching process based on electrical conductivity
  • A method for judging the end point of donkey-hide gelatin blanching process based on electrical conductivity
  • A method for judging the end point of donkey-hide gelatin blanching process based on electrical conductivity

Examples

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Effect test

Embodiment 1

[0060] Put the raw donkey skin into the steaming ball, add water and sodium hydroxide, set the end-point conductivity value κ of the blanching skin residue to 750 μS / cm; discharge the blanching skin residue after heating and keeping warm, and measure its conductivity value, Record it as the first blanching; then add the same amount of water to the steaming ball several times, heat and keep warm, discharge the blanching residual liquid, measure its conductivity value κ, and output the change curve of the residual liquid conductivity value κ ; until the 9th time of blanching, the conductivity value of the blanching residual liquid was 712 μS / cm, which was lower than 750 μS / cm. It was considered that there was no need to carry out the next blanching, and the blanching process reached the end point, and entered the next process. The donkey-hide gelatin product finally obtained from this batch of raw materials has an ash content of 0.79% and a water-insoluble content of 1.20%, both ...

Embodiment 2

[0062] Put the raw donkey skin into the steaming ball, add water and sodium hydroxide, set the end-point conductivity value κ of the blanching skin residue to 750 μS / cm; discharge the blanching skin residue after heating and keeping warm, and measure its conductivity value, Record it as the first blanching; then add the same amount of water to the steaming ball several times, heat and keep warm, discharge the blanching residual liquid, measure its conductivity value κ, and output the change curve of the residual liquid conductivity value κ ; until the 9th time of blanching, the conductivity value of the blanching residual liquid was 749 μS / cm, which was lower than 750 μS / cm. It was considered that there was no need to carry out the next blanching, and the blanching process reached the end point, and entered the next process. The donkey-hide gelatin product finally obtained from this batch of raw materials has an ash content of 0.77% and a water-insoluble content of 1.12%, both ...

Embodiment 3

[0064] Put the raw donkey skin into the steaming ball, add water and sodium hydroxide, set the end-point conductivity value κ of the blanching skin residue to 750 μS / cm; discharge the blanching skin residue after heating and keeping warm, and measure its conductivity value, Record it as the first blanching; then add the same amount of water to the steaming ball several times, heat and keep warm, discharge the blanching residual liquid, measure its conductivity value κ, and output the change curve of the residual liquid conductivity value κ ; until the 14th time of blanching, the conductivity value of the blanching residual liquid was 732 μS / cm, which was lower than 750 μS / cm. It was considered that there was no need to carry out the next blanching, and the blanching process reached the end point, and entered the next process. The donkey-hide gelatin product finally obtained from this batch of raw materials has an ash content of 0.80% and a water-insoluble content of 1.06%, both...

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Abstract

The invention discloses a conductivity-based donkey-hide gelatin skin-blanching process terminal judging method. The method comprises the following steps of: (1) adding raw material donkey hide to a spherical digester, adding water and inorganic base, and setting the terminal conductivity value k of skin-blanching residual liquid as 650-1100 microseconds / cm; (2) heating, keeping temperature, then discharging the skin-blanching residual liquid, measuring the conductivity value of the skin-blanching residual liquid, and recording as first-time skin blanching; (3) then adding equivalent water to the spherical digester for multiple times, heating, keeping the temperature, then discharging the skin-blanching residual liquid, measuring the conductivity value k of the skin-blanching residual liquid, and outputting a change curve of the conductivity value k of the skin-blanching residual liquid; and (4) when the conductivity value of the donkey-hide gelatin skin-blanching residual liquid at a certain time is less than the set terminal conductivity value of the skin-blanching residual liquid, reaching a donkey-hide gelatin skin-blanching process terminal, and carrying out a next procedure. The donkey-hide gelatin skin-blanching process terminal judging method disclosed by the invention can be used for objectively, reliably and fast judging the skin-blanching process terminal, reduces the quality difference of donkey-hide gelatin products among batches, also reduces the process energy consumption, the substance consumption and the labor force and enhances the production capacity.

Description

technical field [0001] The invention relates to a method for discriminating the end point of donkey-hide gelatin blanching process based on electrical conductivity in the production process of donkey-hide gelatin. Background technique [0002] Donkey-hide gelatin is a traditional blood-enriching medicine in my country. It is a solid glue made from donkey skin by decocting and concentrating. Its components are mainly protein and its hydrolyzate polypeptide, amino acid and so on. Donkey-hide gelatin has various health effects such as promoting hematopoiesis, anti-fatigue, and enhancing memory. Its production process needs to go through 49 processes, mainly including raw material processing, blanching, peeling, filtration, evaporation, foam extraction, concentration, condensation, drying, post-processing and other process steps. [0003] The main components of donkey hide, the raw material of donkey-hide gelatin, include collagen, keratin, elastic fiber, fat, water, etc. If i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/06
Inventor 顾川川周祥山尤金花吕秀阳傅杰张淹姜仁禹
Owner ZHEJIANG UNIV
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