Seaborne green method for safely preserving aquatic products

A technology for aquatic products and cold storage, which is applied in the field of green and safe preservation of aquatic products in non-ammonia fluoride evaporative cold rooms on ships, can solve the problems of high cost, inapplicability, and poor fresh-keeping quality.

Inactive Publication Date: 2018-11-30
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the existing aquatic product fresh-keeping technology that it cannot be applied to on-board operations, high energy consumption, high cost, and poor fresh-keeping quality, the present invention provides a method that is effectively suitable for large-scale operations on board, has low energy consumption, low cost, Method for preserving aquatic products without ammonia fluoride evaporation, green safety, and high quality aquatic products

Method used

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  • Seaborne green method for safely preserving aquatic products
  • Seaborne green method for safely preserving aquatic products
  • Seaborne green method for safely preserving aquatic products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Example 1: Preparation of Antarctic Krill Protein Hydrolysate

[0068] Using 100kg Antarctic krill as raw material, first use papain (Nanning Pangbo Bioengineering Co., Ltd., enzyme activity 1 million U / g) for enzymatic hydrolysis, and the amount of enzyme added is 1000 U / g protein, at 40°C, pH 6.5 Enzymatic hydrolysis under conditions for 3 hours to obtain crude Antarctic krill enzyme solution; then the crude Antarctic krill enzyme solution was passed through an ultrafiltration membrane with a pore molecular weight of 100KDa and a membrane pore molecular weight of 50KDa to obtain a protein hydrolysate with an average molecular weight of 50-100KDa.

Embodiment 2

[0070] An antifreeze liquid, the components are as follows in mass percentage: 95% edible alcohol 15%, propylene glycol 10%, glycerol 2%, sodium chloride 3%, calcium chloride 1%, glycine 0.1%, Antarctic krill The protein hydrolyzate is 0.014%, the phospholipid is 0.1%, and the balance is water. The preparation method is as follows: first dissolve 300g sodium chloride, 100g calcium chloride, 10g glycine and 10g phospholipids in 6878.6g water, then add 1500g edible alcohol, 1000g propylene glycol, 200g glycerol and 1.4g Antarctic krill protein hydrolysate and stir well. Obtain antifreeze. The obtained antifreeze liquid has a freezing point of -25°C, good fluidity, and a viscosity of 46.8mPa·S, which is lower in viscosity and less volatile than the ternary refrigerant invented by Zhu Zhiwei and others [Chinese Patent 201210558113.4]. The antifreeze liquid will not freeze and crystallize during rapid stirring at low temperature.

[0071] The test found (freezing curve such as imag...

Embodiment 3

[0073] An antifreeze liquid, the components are as follows in mass percentage: 95% edible alcohol 20%, propylene glycol 15%, glycerol 4%, sodium chloride 4%, calcium chloride 2%, alanine 0.12%, Antarctica Krill protein hydrolysate is 0.30%, Tween (20) is 0.15%, and the balance is water. The preparation method is to first dissolve 400g sodium chloride, 200g calcium chloride, 12g alanine and 15g Tween (20) with 5443g water, then add 2000g edible alcohol, 1500g propylene glycol, 400g glycerol and 30g Antarctic krill protein to hydrolyze After stirring evenly, the antifreeze liquid is obtained. The obtained antifreeze liquid has a freezing point of -35°C, good fluidity at low temperatures, and a viscosity of 185mPa·S. Compared with Qin Haijie [Chinese Patent 201110174042.3], the quaternary refrigerant antifreeze liquid invented by Qin Haijie has less volatilization and lower salt content, and has less corrosion to equipment. The antifreeze liquid will not freeze and crystallize d...

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Abstract

The invention discloses a seaborne method for safely preserving aquatic products. The method comprises the steps that refrigerating is conducted on anti-freeze fluid by using a ship-borne refrigerating system, the anti-freeze fluid is taken as a total cold source, heat exchange is directly or indirectly conducted on captured catches, and the central temperature of fish bodies is rapidly reduced toachieve rapid cooling to reduce the activity of endogenous enzymes and inhibit the propagation of microorganisms; the antifreeze liquid comprises, by mass, 15-30% of edible alcohol, 10-30% of propylene glycol, 2-15% propanetriol, 1-10% of calcium chloride, 3-10% of sodium chloride, 0.1-0.15% of amino acid, 0.01-0.3% of euphausia superba protolysate, 0.005-0.5% surface active agent and the balanceof water. By means of the method, ship-borne large-scale operation can be effectively adapted, the energy consumption is low, the cost is low, ammonia and fluoride evaporation does not exist, the method is green and safe, and the quality of preserved aquatic products is good.

Description

(1) Technical field [0001] The invention relates to a marine safe preservation technology for aquatic products, in particular to a method for green and safe preservation of aquatic products in an ammonia-fluorine-free evaporation cold cabin on a ship. (2) Background technology [0002] After fish and other aquatic products are caught to death, there are still complex biochemical reactions in the body. This is mainly due to the endogenous proteases in the fish and the microorganisms attached to the fish, which causes the quality of aquatic products to continue to decline. The action of microorganisms and enzymes will be inhibited in a low temperature environment, and the speed of chemical reactions such as oxidation will be significantly slowed down, so the freshness of aquatic products can be maintained for a long time without spoilage. This is the working principle of cryopreservation of aquatic products. [0003] At present, the cold cabins of fishing vessels that store and tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63J99/00C09K5/20
CPCC09K5/20B63J99/00A23B4/09A23B4/20A23L3/3472A23L3/3481A23B4/24A23V2002/00B63J2/14
Inventor 丁玉庭刘书来周绪霞刘建华吕飞张建友王彦波张振宇
Owner ZHEJIANG UNIV OF TECH
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