JPH11127726A - Preservation apparatus for living fish or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable preservation apparatus capable of remarkably extending the survival time of a living fish, etc., and of delivering fishes in a living state to consumption area, by making it possible to maintain especially a filtration function for organisms for a long time. SOLUTION: This apparatus comprises a cistern 1 and a filtration unit FA. The filtration unit FA is formed in a shape of a cylinder or a polygonal tube by means of precision filter medium 41, and has (A) a precision filtering equipment 4 having a hole 44 for making unfiltered water pass on one side and a hole 45 for sucking out filtered water on the other side, (B) a water guiding pipe 6, one end of which is coupled with the hole 45 and the other end of which is opened in the upper part of the cistern 1, and (C) a water pumping means 7 for lifting water in the equipment 4 through the pipe 6 and for discharging water in the upper part of the cistern 1. The cistern 1 is assembled into a portable box with an upper lid 3, the top surface of which is fixed to by an air pump 71 where an air pipe 72 is flexible and penetrates the lid 3 into the cistern 1 so as to be inserted in the pipe 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw fish storage device for storing fish and shellfish (raw fish and the like in this specification) captured in a fish cage, an ocean, a river, a lake, or the like.

[0002]

2. Description of the Related Art A conventional raw fish storage device for storing fish caught by a net at a farm, or fish caught in oceans, rivers, lakes and marshes, is placed on the upper or side of a large aquarium. In a filtration tank containing felt and other filter media in a container,
A circulating filtration device is used in which water in a water tank is pumped up by a water pump and filtered water that has passed through is returned to the water tank. It is also known to provide an oxygen supply device without a filtration device, or in addition to the filtration device, to periodically supply oxygen at a constant rate.

[0003]

However, the above-described conventional apparatus merely performs physical filtration, and only circulates relatively large contaminants such as fish excrement by circulating water in a water tank. As the concentration of fine contaminants in the aquarium increases, the amount of dissolved ammonia, which adversely affects live fish, etc., increases, resulting in damage to fish gills and lack of oxygen. Has a relatively short survival time, at most about four or five hours. Even with the oxygen inhaler attached, the effect of prolonging the survival time is recognized, but it is not much different from 8 to 10 hours.

A filtering device using a fine filter such as a paper filter has a great effect in removing fine contaminants, but on the other hand, the passage resistance of water increases with the elapse of use time, and the filter is relatively short. Clogging occurs in time. If the flow of water through the filter is stopped due to this clogging, the aerobic bacteria generated and adhered to the contaminants trapped by the filter will die due to lack of oxygen, and the bacteria will decompose ammonia into nitrite and nitrate. When the (biological filtration function) is not performed, the amount of ammonia in the water tank increases rapidly, and the raw fish and the like cannot survive. For this reason, conventionally, a storage device for raw fish or the like using a microfilter has not been used.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to maintain the biological filtration function for a long time, and to prolong the survival time of raw fish and the like. It is an object of the present invention to provide a raw fish storage device. Another object of the present invention is to provide a portable raw fish storage device capable of transporting fish to a consuming area while utilizing fish caught from a large aquarium or caught in marine rivers and lakes.

[0006]

In order to solve the above-mentioned problems, a raw fish storage device according to the present invention has a water tank and a filtering device for accommodating raw fish and the like so that the raw fish can be freely moved in and out. , A fine filter having a cylindrical shape or a polygonal cylindrical shape with a fine filter medium, a raw water passage hole on one side, and a fine filter having a drain water suction hole on the other side, and one end connected to a drain water suction hole of the fine filter. A water guide pipe having the other end opened in the upper part of the water tank, and water pumping means for raising the water in the fine filter in the water pipe and discharging the water in the upper part of the water tank. With the above configuration, when the pumping means is driven, the water in the water tank mainly passes through the fine filter medium of the fine filter and is physically filtered, and a part of the water passes through the raw water passage hole and enters the fine filter. Flows. Bacteria are captured by the fine filter medium, and the bacteria proliferate over time, and biological filtration is performed. The filtered water in the microfilter is drawn into the water pipe by the aeration or the suction action of the water pump from the filtered water suction hole, rises, and is discharged from the upper end of the water pipe toward the water surface of the water tank.

When a microbial growth promoter is contained in the microfiltration device, the growth of bacteria in the microfiltration device is promoted, so that the biological filtration performance of bacteria is enhanced.

[0008] The microfilter is formed of a pleated filter in the shape of a bottomed cylinder, a plurality of the microfilters are arranged in parallel, and a drainage hole is connected to the water pipe through a connecting pipe. In addition, fine contaminants are efficiently trapped, and bacteria are easily propagated.

[0009] The microfilter is formed into a case with a pleated filter, and when one or more of the case-shaped filters are used as a flat plate at the bottom of the water tank, the effective volume in the water tank is reduced. Can be bigger.

As the pumping means, an aeration device comprising an air pump and a pipe for guiding air discharged from the air pump to near the bottom of the water pipe and discharging the air can be used. The aeration increases the amount of dissolved oxygen in the water, thereby further extending the survival time of raw fish and the like. As the pumping means, a water pump for discharging water in the water pipe from the upper end of the water pipe can be used. When the water tank is large, forced circulation of water is reliably performed, and the filtering effect is improved.

The water tank is, for example, a portable box with an upper lid, such as a fishing cooler box, and an air pump is mounted on the upper surface of the lid, and the pipe has flexibility. If it penetrates inside and is inserted into the water pipe, it becomes a storage device such as portable live fish, aquaculture, fishery,
It can be used to transport raw fish and the like directly from a fish cage or fishing place to a consumption area, and can survive for a long time. Therefore, it is possible to provide the raw fish and the like in more shops than before.

[0012] According to a second aspect of the present invention, there is provided a device for storing raw fish or the like, in which a filtration device is housed in the container and can be connected to the outside of the water tank, and is formed in a tubular or case-like shape. The passage hole, a microfilter having a drainage suction hole at the other end, and one end is connected to the drainage suction hole of the microfilter, the other end watertight the outer wall of the container and the outer wall of the water tank. A water guide pipe that is penetrated and opens near the water surface in the water tank, and a communication pipe that penetrates the outer wall of the water tank and the outer wall of the container with water tightness and communicates the bottom of the water tank and the inside of the container, Pumping means for raising the water in the microfilter to the water pipe. With the above configuration, it is possible to easily provide a marketable portable live fish storage device that can survive for a long time simply by attaching the filtering device outside an existing closed box such as a cooler box.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a storage device for raw fish and the like according to a first embodiment of the present invention. 1
Is an aquarium that can accommodate raw fish and other live seafood (hereinafter simply referred to as fish). Fish can be put into or taken out of the water tank 1 through the opening 2 on the upper surface. The upper lid 3 for opening and closing the opening 2 may or may not be provided. The opening and closing structure of the upper lid 3 is optional.

The water tank 1 is provided with a filtration device FA. The filtration device FA includes a fine filter 4, a water pipe 6,
And a pumping means 7. The microfilter 4 removes fine suspended substances and colloidal substances such as excretions of live fish and shellfish contained in the aquarium 1 and micro-organisms generated in freshwater or seawater, which cannot be removed by filtration with a normal filter medium. It is made into a bottomed cylindrical shape using a filter medium that can be removed, for example, a precision filter medium 41 such as a pleated paper filter. That is, a pleated paper filter 41 having a pleated paper filter to increase the filtration area is formed in a cylindrical shape or a polygonal cylindrical shape, and the openings at both ends of the tube are closed by closing members 42 and 43. And, in the shielding member 42 at the front end,
A small hole 44 for passing the raw water in the water tank 1 is formed, and in the closing member 43 at the rear end, the filtrate obtained through the pleated paper filter 41 is supplied to the outside of the fine filter 4. A drainage drain hole (hereinafter, simply referred to as a “drain hole”) 45 is formed for sucking water. Any material other than a paper filter can be used as the precision filter material 41 as long as it has the same filtration performance as a paper filter.

The microfiltration device 4 uses a paper filter or a microfiltration material equivalent to the paper filter, performs physical filtration with the use of the filtration material, and filters out objects to be filtered (such as pollutants or foreign substances) such as excrement and micro-organisms in a water tank. Is trapped, and the filtration target in the water tank is trapped in the inner and outer grooves formed by the pleats of the precision filter medium 41, and bacteria that act on biological filtration are generated in the filtration target and are easily stayed. It is characterized by doing so.

If the raw water passage hole 44 at the front end of the microfiltration device 4 is not provided, the bacteria adhering and staying on the microfiltration material 41 will be deficient in oxygen when the microfiltration material 41 is completely clogged by foreign matters caught. As a result, the ammonia gas generated from the foreign matter is not decomposed by the bacteria, the water in the water tank becomes cloudy immediately, and the live fish and the like in the water tank fail due to the gills and cannot survive. On the other hand, when a raw water passage hole 44 having a relatively small diameter for water absorption is provided at a front end portion of the fine filter 4 by a pumping means described later, the foreign matter caught by the fine filter material 41 completely prevents the raw water from passing through. Experiments have shown that, even if clogged, the water in the aquarium continues to flow from the raw water passage hole 44, thereby preventing the death of bacteria and, therefore, obtaining a remarkable effect of maintaining biological filtration by bacteria. Has been confirmed.

In a preferred embodiment,
In the microfilter 4, a filter medium 5 having a relatively rough density, such as felt or cotton, to which a bacterial growth promoter is adhered or built, and which has a normal filtration performance is accommodated.
The reason why the filter medium having a relatively rough density is used is to prevent the filter object 5 captured by the filter medium 5 from completely clogging.

The filter medium 5 may not be used merely by containing the bacteria growth promoter in the microfilter 4. However, when the capacity of the aquarium is large and the amount of fish and shellfish to be stored is large, attaching the bacterial growth promoter to the filter medium 5 increases the contact efficiency and the growth promotion effect of the bacterial growth promoter with the flowing water. Moreover, the biological filtration effect of the filter medium 5 is also large.

The microfilter 4 is preferably settled at the bottom of the water tank. This is because foreign substances in the water tank often settle at the bottom. The drainage hole 45 of the fine filter is provided as close to the side wall of the water tank as possible, and the lower end 61 of the water pipe 6 is connected to the drainage hole 45.

The water pipe 6 is extended upward near the side wall of the water tank so as not to reduce the effective volume of the water tank.
Is opened in the direction away from the side wall near the water surface. The water pipe 6 guides the filtrate obtained by the microfilter 4 at the bottom of the water tank to or near the water surface and discharges the water again into the water tank. The water guide pipe 6 is fixed by fixing means that allows easy attachment and detachment of a suction cup or the like (not shown) that is adsorbed to the inner surface of the side wall of the water tank.

The water tank 1 is provided with water pumping means 7 for raising the water in the water pipe 6 from the bottom of the water tank to the top of the water tank. As the water pumping means 7, two types, one using an aeration device and one using a water pump, can be adopted. Either one can be used selectively, or both can be used in combination. FIG. 1 shows an example using an aeration apparatus. That is, the fixed lid 3b is attached to the upper surface of the water tank 1, the air pump 71 is attached to the upper surface of the fixed lid, and the pipe 72 for supplying the air discharged by the air pump 71 is inserted into the water conduit 6, and the bottom of the water conduit 6 It is open near. Water pipe 6
A gap is formed between the inner wall of the pipe and the pipe 72 inserted therein so that water and air discharged from the lower end of the pipe become bubbles and can rise inside the water guide pipe 6.

With the configuration of the above aeration apparatus,
When the air pump 71 is activated, air is discharged from the lower end of the pipe 72, and bubbles rising in the water guide pipe 6 due to its buoyancy raise water in the water guide pipe. As the water pressure at the lower end 61 of the water conduit decreases, the water in the microfiltration device 4 is sucked out and rises in the water conduit 6 in the same manner, from the opening of the upper end 62 of the water conduit to the water surface in the water tank. It is discharged with air bubbles toward. Since the water pressure in the microfilter 4 decreases, the water at the bottom of the water tank passes through the microfilter 41 into the microfilter 4, and at this time, physical filtration and biological filtration are performed.

As the amount of foreign matter trapped in the fine filter medium 41 increases, the water flow resistance in the fine filter medium increases, so that the performance of physical filtration is slightly lowered. On the contrary, a large amount of bacteria is propagated, and biological filtration is promoted. Therefore, the overall filtration performance is improved. In the case where the resistance to water flow of the fine filter medium 41 increases and clogging proceeds, the amount of inflow from the raw water passage hole 44 increases accordingly, thereby effectively preventing the bacteria attached to the fine filter medium 4 and the filter medium 5 from being killed. Is done. Therefore, since the biological filtration performance is maintained, the life time of the raw fish and the like stored in the aquarium is the longest of the conventional one.
Extended from 0 hours to 4 or 5 days.

When a bacterial growth promoter is contained in the microfiltration device 4, biological filtration is further promoted, and excretion of fish and shellfish is completely eliminated in a short time. Water in the aquarium is always purified. Therefore, when the survival time of the fish is 7 to 10 days (depending on the type of fish), there is an effect of being further extended.

When an aeration device is used as the pumping means, air is supplied into the water tank by aeration. Therefore, when an upper cover 3 for closing the upper opening 2 of the water tank 1 is provided, an air vent hole 8 is provided in the upper cover 3. Just do it.

The above embodiment can be applied to both the fixed type and the movable type in which the water tank 1 is mounted on a vehicle and moved. Further, it is suitable for application to medium-sized and large-sized water tanks. However, even if the size of the shipping source, such as a farm or a stand-by place for shipment, is large, if the size of the consuming area, such as a store that cooks raw fish etc. and provides it to customers, is small, the raw fish etc. In the case of transport, a small portable live fish storage device is desired. Even when a fisherman transports fish caught at a fishing place alive to a restaurant, a small portable fish storage device is desired.

FIGS. 2 and 3 show an embodiment in which the present invention is realized in a storage device for small portable live fish and the like. FIG. 2 is a perspective view, and FIG. 3 is a transparent perspective view showing a state in which an upper lid is opened. The storage device for small portable live fish and the like according to the present invention uses a portable box PB as a water tank, uses an aeration device for the pumping means of the filtration device, attaches an air pump that constitutes the air rate device to the upper lid 3E, and attaches it to the water pipe. It is characterized by using a flexible pipe for sending air.

FIG. 2 shows an example in which an existing cooler box is preferably used as the portable box PB. That is, this portable box PB is provided with a water tank 1E composed of a main body.
On one side, an upper lid 3E is attached to be openable and closable via a hinge (not shown). This top lid 3E
By operating and locking the front-side clamp 9 in the closed state, as shown in FIG. 2, it can be conveyed in a sealed manner so as to prevent leakage of water therein, or the same clamp 9 can be used. To unlock it, and holding the handle 10 attached to the upper surface of the upper lid 3E, as shown in FIG.
By opening E, fish and shellfish can be stored or taken out of the water tank 1E.

At the bottom of the water tank 1E, a plurality of microfilters 4E are arranged on a plane. These microfilters 4
In E, as an example of a precision filter medium, a pleated paper filter 41 is formed in a cylindrical shape, and the openings at both ends thereof are closed by closing members 42 and 43 in the same manner as shown in FIG. The blocking member 42 is provided with a raw water passage hole 44, and the blocking member 43 at the other end is provided with a drainage suction hole 45. Preferably, as in the case of the above-described embodiment, each microfilter contains a bacteria growth promoter or a filter medium to which the bacteria growth promoter is adhered.

Then, each of the microfilters 4E is settled at the bottom of the water tank with the drainage suction hole side facing the same side, and the filtrate suction ports of the respective microfilters are connected to the common connecting pipe 11.
The lower ends of the two water pipes 6E are connected to both ends of the connecting pipe. Only one water guide pipe 6E may be connected to one end of the connection pipe 11. The number of microfilters and water conduits used may be determined according to the size of the water tank.

Each of the water pipes 6E is extended along the inner surface of the side wall of the water tank to a position slightly lower than the upper end surface of the water tank 1E, and the upper end is opened in a direction away from the side wall. . As an example, each of the water guide pipes 6E can be easily fixed by detachable fixing means (not shown) such as a suction cup. When the upper lid 3E of the aquarium is opened, the fine filter 4
It is undesirable for E to be exposed. In order to improve the appearance of the bottom, a perforated plate 12 covering the upper surface of the microfilter is dropped into the bottom of the water tank. The perforated plate 12 is formed of a material heavier than water so as to be maintained at the bottom of the water tank, and has a large number of holes so that water in the water tank can flow to the microfilter side. Notch 1 that escapes water transmission pipe 6E
2a is provided. The notch also has a function of fitting with the water pipe 6E and fixing the water pipe 6E at a predetermined position.

The microfilter 4E is simply left at the bottom of the water tank,
In the case of a simple structure in which the filter is easily fixed with a suction cup or the like and pressed with the perforated plate 12, especially when the bottom of the water tank becomes very dirty, the microfilter or the water pipe is easily taken out of the water tank. There is an advantage that cleaning and cleaning can be performed quickly.

It is desirable to use an aeration device for the pumping means used in the filtration device attached to the portable box. Then, the air pump 7E is fixed to the upper surface of the upper lid 3E, and a flexible pipe is used for the pipe, which penetrates the upper lid 3E and is inserted into the water guide pipe 6E.
It extends to near the bottom of the water pipe. The pipe 72E is
It has flexibility at least between the upper lid 3E and the water pipe 6E, and the pipe bends according to a change in the distance of the upper lid from the main body 1E when the upper lid 3E is opened and closed, so that the lid can be opened and closed smoothly, and Fatigue cutting of the pipe is prevented.

When the air discharge force is sufficient with one air pump 71E, the pipe connected to one air pump 71E is branched into two pipes as shown in FIGS. What is necessary is just to insert a front-end | tip into each water conveyance pipe 6E.

The upper lid 3E of the cooler box is often closed when closed. In such a case,
It is necessary to provide the upper lid 3E with an air vent hole 13 for discharging the air supplied from the pipe 72E to the outside.

In the above embodiment, the microfilters 4,
Although 4E is shown as having a cylindrical shape, as shown in FIG. 4, a flat rectangular tube (flat plate) 4e can be used. 41e is a precision filter medium, 4
4e is a raw water passage hole, and 45e is a drainage drain hole. The fine filter 4e formed in such a flat plate shape can effectively use a large area of the bottom of the water tank, and can perform the filtration efficiently without reducing the effective volume of the water tank.
Further, since the flat-plate-shaped fine filter 4e is flat and hardly loses its volume, one or more of the flat-bottomed fine filters 4e can be left standing in a horizontal state at the bottom of the water tank, or can be used in a vertical state according to the side wall of the water tank. Alternatively, it can be installed and used in an inclined state.

In the above embodiment, the filtering device is provided inside the water tank, but the present invention is not limited to this. Whether the tank is fixed or portable,
The filtering device can be attached to the outside of the water tank from the beginning or can be attached later.

FIG. 5 shows an example of an external storage device for raw fish and the like. The filtration device FAE has a container 14. Container 1
Reference numeral 4 has a filtration chamber 15 therein, and connection pipes 16a and 16 for connecting the filtration chamber 15 to the outside at the upper and lower portions of the container.
b is projected. In the filtration chamber, one or more microfilters 4e are provided with the raw water passage holes 44 in the filtration chamber 15e.
Are housed in an open state near the bottom of the filter chamber and with the precision filter medium 41 separated from the inner peripheral wall of the filtration chamber. The upper end of the water guide pipe 6e, one end of which is connected to the drainage suction hole provided on the upper part of the fine filter 4e,
It is connected to the upper communication pipe 16a. On the upper surface of the container 14, a water pumping means 7e is attached. When the pumping means is an aeration device, the air discharge pipe 72 of the air pump 71 attached to the upper surface of the container is inserted up to near the lower end of the water guide pipe 6e. When the pumping means is a water pump, although not shown, a rotation shaft of a motor attached to the upper surface of the container is extended into the water pipe, and a propeller is fixed to a lower end of the rotation shaft.

Holes 17a, 17a, are formed above and below one side wall of the water tank 1e.
A connection pipe 16 is provided in each of the holes 17a and 17b, and is protruded from the side surface of the container 14 of the filtration device FAE.
a and 16b are press-fitted and fixed with a fixing member.
e and the filtration chamber 15 of the filtration device are communicated with each other. It goes without saying that the water tank 1e and the portion penetrating the connecting pipes 16a and 16b of the container are kept watertight by packing (not shown) by a conventional technique. Upper connecting pipe 16
a may be formed integrally with the upper end of the water pipe 6e.

When an aeration device is used as the pumping means, and a box that becomes airtight when a lid such as a cooler box is closed in the water tank, an air vent hole 13 must be provided in the lid or the like. Is as described above. When the water tank inclines while moving, the upper lid 3 is used to prevent water bubbles remaining on the upper surface of the water tank from being ejected from the air vent hole 13e to the outside by the aeration to wet the upper surface of the lid.
It is desirable to provide a well-known gas-liquid separator 18 in the air vent hole 13e on the lower surface of e.

[0041]

As described above, the storage device for raw fish and the like according to the present invention is formed in a cylindrical shape or a polygonal cylindrical shape with a precision filter medium.
A microfiltration filter having a raw water passage hole on one side and a drainage suction hole on the other side, a water guide pipe having one end connected to the drainage suction hole and the other end opened at an upper part in the water tank; The water tank is provided with a filtering device having a pumping means for raising the water in the water pipe and discharging the water in the upper part of the water tank.When the water pumping means is driven, most of the water in the water tank is a precision filter medium. , And is biologically filtered by bacteria adhering to the precision filter medium, so that high-performance filtration is performed. And, even if clogging occurs due to foreign matter trapped in the microfiltration media, the water in the water tank flows through the raw water passage holes and into the microfiltration device, preventing bacteria from dying out. Will be maintained. Therefore, the life of the raw fish and the like stored in the aquarium is significantly extended as compared with the conventional storage device.

The water tank is, for example, a portable box with an upper lid, such as a fishing cooler box, and an air pump is mounted on the upper surface of the lid, and the pipe is flexible. If it penetrates inside and is inserted into the water pipe, it becomes a storage device such as portable live fish, aquaculture, fishery,
It can be used to transport raw fish and the like directly from a fish cage or fishing place to a consumption area, and can survive for a long time. Therefore, it is possible to provide the raw fish and the like in more shops than before.

Furthermore, the storage device for portable raw fish etc. of the present invention
The filtration device accommodates a raw water passage hole at one end and a fine filter having a drainage suction hole at the other end in a container connectable to the outside of the water tank, and one end is connected to the drainage suction hole, Penetrates the outer wall of the container and the outer wall of the water tank with watertightness, and a water guide pipe that is open near the water surface in the water tank, and penetrates the outer wall of the water tank and the outer wall of the container with watertightness to form the inside of the water tank. And a pumping means for raising the water in the microfilter to the water pipe, so that it can be retrofitted to an existing fixed or portable water tank. Thus, it is possible to provide a storage device for raw fish or the like that can guarantee a long-term survival time only by connecting a filtration device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an example of a raw fish storage device according to the present invention.

FIG. 2 is an external perspective view of another example of the raw fish storage device.

FIG. 3 is a perspective view of the device.

FIG. 4 is a perspective view showing another example of the microfilter.

FIG. 5 is a cross-sectional view of still another example of the raw fish storage device.

[Explanation of symbols]

 1,1E, 1e Water tank FA, FAE Filtration device 3,3E, 3e Top cover 4,4E, 4e Precision filter 41,41E, 41e Precision filter material 44 Raw water passage hole 45 Filter water suction hole 5 Normal filter material 6,6E, 6e Water pipe 7, 7E, 7e Pumping means 71 Air pump 72 Pipe 13 Container 15 Connecting pipe

Claims (10)

[Claims] 1. A water tank for accommodating raw fish and the like so as to be able to enter and exit freely, and a filtering device, wherein the filtering device is formed in a cylindrical shape or a polygonal cylindrical shape with a precision filter medium, and a raw water passage hole is provided on one side and another is provided. A microfiltration device having a drainage suction hole on the side thereof, a water guide pipe having one end connected to the drainage suction hole of the microfiltration device and the other end opening at an upper portion in the water tank, and water in the microfiltration device. Pumping means for raising the inside of the water pipe and discharging the water at the upper part in the water tank,
A storage device for raw fish and the like, characterized in that: 2. The apparatus for storing raw fish and the like according to claim 1, wherein the microbial filter contains a bacterial growth promoter. 3. The microfiltration device is formed in a bottomed cylindrical shape with a pleated filter, a plurality of the microfiltration devices are arranged in parallel, and each drainage hole is connected to a water pipe through a connecting pipe. The storage device for raw fish and the like according to claim 1, wherein: 4. The microfiltration device according to claim 1, wherein the microfiltration device is formed in a flat rectangular tube shape by using a pleated filter, and one or more of the microfiltration devices are placed on the bottom of the water tank in a flat state. The described raw fish storage device. 5. An aeration apparatus comprising an air pump and a pipe for guiding and discharging air discharged from the air pump to near the bottom of the water pipe, wherein the water pumping means is used. Or the raw fish storage device described in 4. 6. The raw fish storage device according to claim 1, wherein the water pumping means uses a water pump for discharging water in the water pipe from an upper end portion of the water pipe. 7. The water tank is a portable box with an upper lid, an air pump is mounted on the upper surface of the upper lid, and a pipe having flexibility is used, and the pipe penetrates the upper lid into the water tank. The raw fish storage device according to claim 5, wherein the device is inserted into a water pipe. 8. A water tank for accommodating raw fish and the like so as to be able to enter and leave freely, and a filtering device, wherein the filtering device comprises: a container connectable to the outside of the water tank;
A microfiltration device housed in the container and formed in a cylindrical or polygonal cylindrical shape and having a raw water passage hole at one end and a drainage suction hole at the other end, The other end is connected to a suction hole, the other end of which penetrates the side wall of the container and the side wall of the water tank in a watertight manner, and a water guide pipe opened at an upper portion in the water tank, and the outer wall of the water tank and the outer wall of the container are watertight. A communication pipe that penetrates the bottom of the water tank and communicates with the inside of the vessel, and a water pump that discharges water in the microfilter from an upper opening of the water pipe. Raw fish storage device. 9. The storage device for live fish and the like according to claim 8, wherein a bacteria growth promoter is contained in the microfilter. 10. The storage device for live fish and the like according to claim 8, wherein the water tank is a portable box with an upper lid.