JP2008113591A - Method for preserving live crabs - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preserving live crabs enabling preservation of live crabs using small quantity of materials, and moreover, reduction in waste materials of the live crabs, after consumption. <P>SOLUTION: The method for storing live crabs comprises charging a water-impermeable/air-impermeable flexible bag with live crabs and seawater in which oxygen is dissolved so as to be supersaturated; further, supplying oxygen into the flexible bag so as to blow up the flexible bag, followed by hermetically sealing the flexible bag; refrigerating the flexible bag at temperature of 1-5°C to preserve the live crabs. For the seawater, by using artificial seawater which is obtained by charging artificial sea salt in pure water, which is obtained by passing tap water through a reverse-osmosis membrane and carrying out mixing of water to aeration, artificial sea water with artificial salt dissolved in pure water can be used. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for preserving vital rice, and more particularly, to a method for transporting and preserving while making use of active rice.

  For example, live salmon has high added value for consumers, and there is a need for a method that can transport live salmon fresh from fishing ports to wholesale markets, wholesalers, fresh fish stores, and even consumers.

  Therefore, it has been practiced to store the livestock under the same conditions as in the sea by filling the tank of the vehicle with seawater and putting the livestock in the tank, but there are facilities for temperature control and water purification. It becomes a big scale and invites high cost of vitality.

  On the other hand, a method in which sawdust is packed in a container such as polystyrene foam, and livestock is buried in the sawdust and stored, or in a container, the livestock is sandwiched between a cold insulation material and a non-woven fabric or between water retention materials. A method has been proposed (Patent Document 1). Moreover, the vigor is put in a sealed container, a porous carrier carrying an oxygen scavenger composition, such as activated carbon, is packed in the container, and the inside of the container is quickly brought into a low oxygen atmosphere of 0.5 to 5 vol.%. There has also been proposed a method of adjusting and storing refrigerated rice cake (Patent Document 2).

Japanese Patent Laid-Open No. 08-133372 JP 02-135044 A

  However, the storage methods described in Patent Documents 1 and 2 require a large amount of materials such as containers such as polystyrene foam, sawdust, cold insulation material and nonwoven fabric, water retention material, porous carrier, etc. After consuming the soot, the container, sawdust, cold insulation material and nonwoven fabric, water retention material, and porous carrier remain, which is bulky and troublesome to store and discard.

  In view of such problems, an object of the present invention is to provide a method for preserving vitals that can preserve vitals with a small amount of materials and can reduce waste after consumption of the vitals.

  Therefore, in the method for preserving the vigor according to the present invention, in order to preserve the vigor while alive, the seawater and the vigor in which oxygen is supersaturated are put in an impermeable and air-permeable soft bag. After oxygen is further supplied into the soft bag to inflate the soft bag, the soft bag is sealed, and the soft bag in this state is refrigerated at a temperature in the range of 1 ° C to 5 ° C to preserve the vigor. It is characterized by doing so.

  One of the features of the present invention resides in that the livestock is stored in a refrigerator by using an impermeable and impermeable soft bag and seawater. As a result, the only material remaining after the consumption of the vigor is the soft bag, which is not bulky and can be easily stored and discarded.

  Another feature of the present invention is that oxygen is dissolved in a super-saturated state in the soft bag, and the vigor is stored by refrigeration at a temperature in the range of 1 ° C to 5 ° C. Thereby, the activity of a vital can be reduced and it can be maintained in the state where the vital was activated by the dissolved oxygen of seawater. According to the experiment of the present inventor, it was confirmed that although there is a difference in solids of livestock, it can be reliably stored for about 5 to 7 days.

  Here, if the temperature of the vigor in the soft bag is less than 1 ° C, the vigor will be frozen. This increases the amount of impurities and shortens the life span of the vigor, so the temperature is set to 1 ° C to 5 ° C.

  Natural seawater may be used as the seawater, but it has been found that artificial seawater can provide longer survival days. Artificial seawater can be produced by dissolving artificial sea salt in pure water by introducing artificial sea salt into pure water obtained by passing tap water through a reverse osmosis membrane and performing air aeration.

  When natural seawater is used, it is preferable to use seawater sterilized by ultraviolet sterilization. A commercially available sterilization apparatus can be used for the ultraviolet sterilization.

  The soft bag may be made of any material as long as it is water-impermeable and air-permeable and has softness. However, in consideration of availability, it is preferable to use a polynylon bag. In addition, the mouth portion of the soft bag may be sealed by heat sealing (thermocompression bonding), or may be sealed with a string or the like.

  There are no particular limitations on the type of live rice cake, which can be applied to the preservation of rice cakes such as snow crab, hair crab, blue crab, king crab, and red crab. In the case of a cocoon having a body length of 100 cm to 10 cm, such as a snow crab, 3 liters of seawater should be used for one live culm. In addition, if the feet and scissors of the puppet move freely, the soft bag may be broken. Therefore, it is desirable to restrict the movement of the feet and scissors with a string such as a rubber band.

[Example 1]
Using a commercially available reverse osmosis membrane device, tap water was passed through the reverse osmosis membrane to produce pure water. 4 kg of artificial sea salt (product name: artificial sea salt, manufactured by Seinan Automobile Co., Ltd., Ehime Prefecture) is added to 100 liters of pure water, aerated with air until it becomes transparent, artificial sea salt is dissolved, and artificial sea salt is dissolved. I got seawater.

  After adjusting the water temperature of this artificial seawater to a temperature within the range of 1 ° C to 5 ° C, for example, 2 ° C, 100 liters of artificial seawater is poured into a bowl and oxygen is blown to dissolve in supersaturation. In a polynylon bag with a thickness of 150 μm, a width of 20 cm, and a length of 60 cm, put 3 liters of artificial seawater with water temperature adjusted and oxygen dissolved in supersaturation and one live snow crab with a body length of 70 cm. After feeding and inflating, the mouth of the polynylon bag was sealed by heat sealing.

  Snow crab in a polynylon bag can be used for about 7 days if refrigerated at an appropriate temperature in the range of 1 ° C to 5 ° C, for example 2 ° C. It can be transported from the wholesale market to fresh fish stores and even to consumers. Further, even in the case where there is no refrigeration / freezing facility in the consumer, for example, at home, the bag can be stored refrigerated while being stored in the polynylon bag until the storage period elapses.

[Example 2]
Livestock was preserved in the same manner as in Example 1 except that seawater obtained by sterilizing natural seawater by ultraviolet sterilization was used instead of artificial seawater. In this example, the number of storage days was shortened to 5 days compared to when artificial seawater was used, but this is considered to be because the balance of ammonium nitrite, seawater PH, nitric acid, etc. is inferior to that of artificial seawater.

Claims (6)

In storing lively alive,
Put water and vigor in which oxygen is supersaturated in a water-impermeable and air-impermeable soft bag, supply oxygen further into this soft bag and inflate the soft bag, then seal the soft bag,
A method for preserving vigor, characterized in that the soft bag in this state is refrigerated at a temperature in the range of 1 ° C to 5 ° C to preserve vigor.   The active seawater according to claim 1, wherein the seawater is artificial seawater in which artificial sea salt is dissolved in pure water by introducing artificial sea salt into pure water obtained by passing tap water through a reverse osmosis membrane and performing air aeration. How to save salmon.   2. The method of preserving vital rice according to claim 1, wherein the seawater is seawater obtained by sterilizing natural seawater with ultraviolet rays.   2. The method of preserving vital rice according to claim 1, wherein the soft bag is a polynylon bag.   2. The method of preserving vitality according to claim 1, wherein the vitality is 100 cm to 10 cm in length, and 3 liters of seawater is used for one vitality.   6. The method of preserving the vital ribs according to claim 1, wherein the movement of the legs and the scissors of the vital ribs is restricted by a string.