Method for fresh-keeping of aquatic product by electrolytic ice

A technology of electrolyzed water and aquatic products, which is applied in applications, food preservation, meat/fish preservation through freezing/cooling, etc. It can solve the problems of high manufacturing cost, high corrosiveness, and unstable available chlorine of strong acid electrolyzed water, and achieve Solve the problem of safety control of pathogenic microorganisms, low cost, good sterilization effect

Inactive Publication Date: 2013-01-16
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic and foreign researches on the application of electrolyzed water are all focused on electrolyzed water with low acidity (pH<2.7), and the lower pH is just corrosive to the quality of food (especially aquatic products) and packaging and transportation materials. Among them, the available chlori

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: At room temperature, the concentration of 0.10% NaCl aqueous solution is prepared by electrolyzed water preparation equipment (such as Yantai Fangxin electrolyzed water equipment) to produce weakly acidic electrolyzed water (pH 5.0, redox potential 1100mV, available chlorine content 20ppm), Fill with carbon dioxide gas to make the carbon dioxide content in the active electrolytic water reach 10ml / l (v / v), and then freeze to prepare active electrolytic ice. The prepared electrolytic ice is flowable, with an ice content of 70%, an ice particle diameter of 8.0mm, and a density of 850kg / m 3 ; The fresh and live mackerel was rinsed twice quickly with the prepared weakly acidic electrolyzed water (4° C.), and the mackerel was neatly placed in the fish cabin of the fishing operation ship at sea. The bottom of the fish cabin was covered with 10.0 cm active electrolytic ice. A layer of active electrolytic ice is evenly covered on the top, and the amount of ice used i...

example 2

[0020] Example 2: At room temperature, the concentration of 0.15% NaCl aqueous solution is prepared by electrolyzed water preparation equipment (such as Yantai Fangxin electrolyzed water equipment) to produce weakly acidic electrolyzed water (pH 5.5, redox potential 1000mV, available chlorine content 40ppm), Fill with carbon dioxide gas to make the carbon dioxide content in the active electrolytic water reach 8ml / l (v / v), and then prepare active electrolytic ice by freezing. The prepared electrolytic ice is flowable, with an ice content of 80%, an ice particle diameter of 6.0mm, and a density of 900kg / m 3 ; The fresh and live Penaeus vannamei was quickly rinsed 3 times with the prepared weakly acidic electrolyzed water (5°C), and the shrimp were neatly placed in the supermarket sales freezer. The bottom of the freezer was covered with 10.0cm active electrolytic ice, and the surface of the shrimp was evenly covered layer of active electrolytic ice, and the amount of ice used i...

example 3

[0024] Example 3: At room temperature, the concentration of 0.20% NaCl aqueous solution is prepared by electrolyzed water preparation equipment (such as Yantai Fangxin electrolyzed water equipment) to produce weakly acidic electrolyzed water (pH 6.5, redox potential 1100mV, available chlorine content 60ppm), Fill with carbon dioxide gas to make the carbon dioxide content in the active electrolytic water reach 20ml / l (v / v), and then prepare active electrolytic ice by freezing. The prepared electrolytic ice is flowable, with an ice content of 90%, an ice particle diameter of 4.0mm, and a density of 900kg / m 3 ; The fresh and live squid was quickly rinsed once with the prepared weakly acidic electrolyzed water (0 ° C), and the squid was neatly placed in the refrigerator of the long-distance transport vehicle. The bottom of the refrigerator was covered with 15.0 cm of active electrolytic ice. The squid is evenly covered with a layer of active electrolytic ice, and the amount of ic...

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Abstract

The invention relates to a method for fresh-keeping of an aquatic product by electrolytic ice. The method is characterized by comprising the steps of: at room temperature, subjecting an NaCl aqueous solution with a mass concentration of 0.08-0.20% to preparation of weak acidic electrolytic water through electrolytic water preparation equipment; filling the prepared weak acidic electrolytic water with a carbon dioxide gas, and further conducting freezing so as to obtain active electrolytic ice; leaching the fresh and live aquatic product with the prepared weak acidic electrolytic water 1-3 times rapidly, and then placing the aquatic product in the fishroom of a fishing workboat, a transportation or selling preservation box, a refrigerated transport vehicle or a supermarket freezer; and finally covering the aquatic product with a layer of active electrolytic ice. The method provided in the invention makes use of the electrolytic ice prepared by freezing of weak acidic electrolytic water to keep the freshness of the aquatic product, and can achieve a good sterilizing effect, thus effectively controlling pathogenic microorganisms in the aquatic product. Meanwhile, the fresh-keeping method has the advantages of simple process and low cost, solves the safety control problem of aquatic product pathogenic microorganisms, reduces wasting of fresh and live aquatic resources, and guarantees the quality safety of the aquatic product and its products as well as the fitness of consumers.

Description

technical field [0001] The invention belongs to the technical field of quality safety and control of aquatic products, and in particular relates to a method for using electrolytic ice to preserve fresh aquatic products. The prepared electrolytic ice is used to inhibit or kill pathogenic microorganisms in fresh aquatic products. Background technique [0002] Fresh aquatic products have high water content (70-80%), fragile tissues, easy for bacteria to invade, and are prone to spoilage and deterioration under the action of endogenous enzymes in the tissues. According to statistical analysis, about 20% of fresh and live aquatic products in my country have deteriorated due to corruption, and the annual economic loss is as high as 27 billion yuan. These rotten aquatic products are either directly discarded to pollute sea areas and ports or used as feed, resulting in serious loss of resources. Therefore, the preservation technology of fresh aquatic products has become an importan...

Claims

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Application Information

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IPC IPC(8): A23L3/36A23B4/06
Inventor 张宾邓尚贵林慧敏
Owner ZHEJIANG OCEAN UNIV
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