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A kind of compound degreasing method of fish skin gelatin solution

A technology for skin gelatin and solution, applied in the field of compound degreasing of fish skin gelatin solution, can solve the problems of residual organic solvent, complicated operation method and high production cost, and achieve the effects of short time consumption, simple process and high safety.

Active Publication Date: 2019-07-19
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degreasing effect of the subtractive method is poor, and the organic solvent method will have the hidden danger of organic solvent residue
And these degreasing methods that act on raw materials cannot directly act on gelatin solution, and there are problems such as complicated operation methods, high production costs, and potential safety hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take a glass container, pour 100mL of water into it, add 2.5g of silver carp skin gelatin extracted by the hot water method after freeze-drying (soak the silver carp skin in 0.01mol / L citric acid for about 15min until the skin swells, wash with water repeatedly to neutrality, extracted in hot water at 70°C for 2 hours, filtered through silk gauze, concentrated by rotary evaporation, and then freeze-dried) heated and stirred to dissolve completely. First, 5 g of chitosan with a deacetylation degree of 75% was added thereinto, stirred in a constant temperature water bath at 45° C., and stirred at a medium speed for 60 min. After the stirring is stopped, the solution in the glass container is transferred to a centrifuge cup, and the centrifugation parameters are set, the rotation speed is 6000 rpm, and the time is 20 min. After centrifugation, take the upper silver carp skin gelatin solution and transfer it to a clean glass container. Then 10g of the pretreated D101 macro...

Embodiment 2

[0025] Pour water into a glass container, and the volume ratio of the silver carp skin gelatin weight to water is 24:1g / L, and add the freeze-dried silver carp skin gelatin in the water. After the gelatin is dissolved, add 15% D101 type macroporous resin without pretreatment according to the mass to volume ratio, and stir for 70 minutes at a medium speed in a water bath at a temperature of 45°C. After the stirring was stopped, the glass container was removed and allowed to cool to room temperature. Then it was subjected to high-speed centrifugation at 6000 rpm for 20 min. After centrifugation, take the supernatant. The supernatant was freeze-dried to obtain degreased silver carp skin gelatin, and its triglyceride content was measured to be (0.73±0.03)%, and the degreasing effect was lower than that of Example 1.

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Abstract

The invention provides a degreasing method for a silver carp skin gelatin solution. Firstly, chitosan is added into the silver carp skin gelatin solution, constant-temperature stirring is conducted, supernatant is obtained after centrifugation, pre-processed D101 type macroporous resin is added into the supernatant, then constant-temperature stirring is carried out, and the centrifuged supernatant is concentrated and dried to obtain a low-fat gelatin product. Compared with a traditional organic solvent method, the method has the advantage of being high in safety. Compared with a carbon dioxide supercritical extraction technology, the price of constant-temperature equipment used in the technological operation process of the method is far lower than that of a carbon dioxide supercritical extraction device, and capital cost generated in the anti-explosion measure of the carbon dioxide supercritical extraction device is reduced. The method is simple in technology, low in energy consumption and short in consumed time, the degreasing method of the gelatin solution is enriched, application and edible value of silver carp skin gelatin are greatly improved, and economic benefits of production enterprises can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of fish skin processing, and in particular relates to a compound degreasing method of fish skin gelatin solution. Background technique [0002] Gelatin is a denatured collagen mainly found in animal bones, cartilage, skin and other tissues. It is obtained by hot water extraction, which is simple and safe, but it will cause impurities such as lipids and other organic substances, inorganic substances, and pigments to exist in the gelatin solution. Thereby affecting the quality and application prospect of gelatin. [0003] Silver carp is the second freshwater fish species in my country's freshwater aquaculture production. Due to its large output, a large amount of fish skin by-products are produced in the processing of silver carp products, which causes waste of resources and pollution of the environment. Extracting gelatin from silver carp skin is a very good way to increase its utilization value. Yet silv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23J3/06
CPCA23J3/06A23V2002/00A23V2250/082A23V2250/511A23V2300/31A23V2200/08
Inventor 侯虎李八方郑海旭张朝辉牛慧娜
Owner OCEAN UNIV OF CHINA
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