JP2000069879A - Water tank system for culturing marine animal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water tank system for culturing marine animal by using both a seawater circulating system for taking advantage of seawater cleaning by Polychaeta and a seawater supplying/draining system for causing a uniform water current in a water tank. SOLUTION: In this water tank system for culturing marine animal, the inner wall of a water tank is provided with a difference in level 10a. The dividing member 11 is supported by the difference in level 10a. A marine animal culture zone 20 and a draining zone 30 are dividedly formed by the dividing member 11. A seawater cleaning layer 31 comprising a Polychaeta living zone for treating excreta of marine animal and residual feed is installed in the draining zone 30 and plural drain holes 40 are arranged in the bottom of the water tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aquarium system for cultivating marine animals using a seawater circulation system and a flowing water system, and more particularly, to a seawater circulation system utilizing seawater purification using polychaetes and a uniform water flow in the water tank. The present invention relates to an aquarium system for culturing marine animals using a water supply / drainage system for seawater.

[0002]

2. Description of the Related Art Conventionally, in marine animal cultivation, it is the most important condition that fresh seawater is constantly supplied, and the removal of cultured animal excrement accumulated at the bottom of an aquarium is periodically sucked together with seawater manually. Although the method has been adopted, the need to consider environmental pollution issues is increasing today, and the seawater used for aquaculture contains organic matter and nutrients contained in residual food and excrement of farmed animals. It is desired that the seawater in the aquarium be returned to the sea after being purified to some extent, instead of being discharged as it is.

[0003] In recent years, to meet such demands,
BACKGROUND ART Circulating water tanks have been developed that purify seawater using polychaete such as rotifers and mosses, and circulate and use purified seawater to some extent. These polychaetes treat the residual food and excrement of farmed animals, and when bred in combination with rock wool, a fibrous material, reduce the harmful ammonia nitrogen concentration of the circulating water in the breeding animals, It has been experimentally confirmed that the nitrification action (the conversion action from ammonium nitrogen to nitrate nitrogen) by the nitrogen is promoted. However, in such a tank that circulates and uses seawater,
The problem is that the concentration of salts such as nitric acid in the circulating water increases.

[0004] On the other hand, the shape of the water tank in the conventional water tank system is such that the inner wall of the water tank is generally flat so that the water flow does not flow back due to an obstruction in the water tank to cause stagnation of the water. However, in order to use such an existing aquarium to provide a partition for separating the aquaculture animal's habitat and the seawater purifying portion, materials and reinforcement that can withstand water pressure are necessary, and the cost is high. As a habitat for farmed animals, there is a method in which a basket is suspended by passing a stick over the top of the aquarium, but in this case, the aquarium must be reinforced to withstand the weight of the cage containing the farmed animal. In addition, when such a method is employed, operations such as taking out and feeding marine animals become complicated. Specifically, when the upper surface of the aquarium is shaded with a net or the like, or when feeding farmed animals, baskets and sticks protruding from the aquarium interfere with work.

[0005] In addition, regarding the water supply / drainage method in the conventional water tank including the above-mentioned circulation type water tank, water flows linearly from one end to the other end so that the state of water flow in the water tank is as uniform as possible. Is considered ideal. However, seawater is generally supplied and drained only from the center or end of the tank. For this reason, there has been a problem that the quality of water near the drainage port cannot be prevented from deteriorating due to excrement of farmed animals and remaining food.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the prior art, an object of the present invention is to use fresh water in a water tank by combining a circulation system and a flowing water system while utilizing the water purification ability of polychaetes. In addition to the constant supply, the marine animal farming habitat area and the drainage area in the aquarium can be easily separated, and a uniform water flow can be generated in the aquarium by uniform water supply from the upper part of the aquarium and rapid drainage from the lower part of the aquarium. It is an object of the present invention to provide a marine animal aquarium system.

[0007]

To achieve the above object, a marine animal aquaculture tank system according to the present invention is provided with a step on an inner wall of the tank, and a partition member is supported on the step,
The sorting member separates and forms a marine animal farming habitat area and a drainage area, and further provides a seawater purification layer comprising a polychaete housing area for processing marine animal excrement and residual food in the drainage area. A plurality of drain holes are arranged on the bottom surface.

In this aquarium system, the excrement and remaining food of marine animals are treated to a certain extent by polychaete, so that they can be purified to some extent, and the purified seawater can be recycled. In addition, when fresh seawater needs to be supplied, such as when salts increase in the circulating seawater, the seawater can be efficiently drained from the multiple drains on the bottom of the tank, and the seawater in the tank is constantly refreshed. Condition can be maintained. It should be noted here that the aquarium system of the present invention is a combination of a circulation system and a flowing water system. When the circulation method, that is, when the seawater is circulated, the seawater is not drained from the drain port to the outside of the circulation system, and a closed circulation cycle is formed. In the flowing water system, that is, when the circulation cycle is temporarily stopped and fresh seawater is supplied from outside the circulation system, the seawater flows out of the circulation system from the discharge port simultaneously with the water supply.

In the aquarium system of the present invention in which a step is provided on the inner wall of the tank, the division member supported by the step makes it possible to easily separate the marine animal culture and living area from the drainage area. The sorting member may be, for example, a net-like member or a rod-like member. If desired, a basket, a net, or the like may be placed on the member so that marine animals can be easily taken in and out. Further, as another form, the sorting member may be a car directly supported by a step. This eliminates the problem of reinforcement for suspending the car and work obstruction. In addition, the excrement and remaining food of the cultured animal flow into the drainage area through the gap between the mesh-shaped, rod-shaped, and cage-shaped sorting members, so that the excrement and the residual food can be easily removed from the marine animal culture and living area. .

[0010] By providing a seawater purification layer consisting of a polychaete settlement in the drainage zone, excreta and residual food that have flowed into the drainage zone are treated by the polychaete, and the nitrification of microorganisms in this layer is achieved. Ammonium ions harmful to cultured animals are converted to nitrate ions.

As described above, when fresh seawater is supplied from outside the circulation system as required, drainage can be quickly performed from a plurality of drainage ports arranged on the bottom of the water tank. It is necessary to supply water at the same time as drainage, but for example, by blowing seawater like a shower from a large number of perforated pipes provided at the top of the tank, water can be supplied evenly over the entire surface of the water tank. Preferably, a uniform supply of seawater is provided. In this way, seawater quickly flows from the top of the tank to the many drains provided at the bottom of the tank without stagnation, so that the water flow in the tank becomes ideally homogeneous and the water supply and drainage efficiency increases. Will also be higher.

The aquarium system according to the present invention is further characterized in that a partition wall is provided inside the aquarium to divide the aquarium into a main aquarium area comprising a marine animal farming habitat area and a drainage area, and a purified water area. A gap is provided between the lower end of the partition wall and the bottom of the water tank, and the gap allows seawater to flow between the main water tank area and the purified water area. Further, in the marine animal culture tank system according to the present invention, the seawater in the main tank area purified by the seawater purification layer is caused to flow into the purified water area through a gap at a lower end portion of the partition wall, and the purified water is A circulating pump is provided to pump out the seawater of the area to the marine animal cultivation area. In the water tank system having this configuration, the seawater can be circulated as described above, but the purified water treated in the polychaete housing area passes from the bottom of the main tank area to the purified water through the gap at the lower end of the partition wall. A circulation cycle is formed by flowing into the area and supplying seawater from the purified water area to the main tank area using a circulation pump.

As a preferred embodiment of the aquarium system according to the present invention, a seawater supply channel for drawing seawater from outside of the aquarium is further provided, and the circulation pump uses the seawater from the seawater supply channel for marine animal culture and habitat. It is suggested to send to ward. When the circulation pump is used for the circulation system as described above, the circulation pump serves to send out the seawater in the purified water area to the marine animal cultivation area, and stops the circulation cycle for use in the water flow system. In such a case, the circulation pump serves to draw fresh seawater from outside the water tank through the seawater supply channel. Thus, the circulation pump can be used for both the circulation system and the flowing water system.

As described above, when the circulation cycle is temporarily stopped as necessary to supply seawater from the seawater supply channel to the marine animal cultivation and living area, the seawater in the water tank is simultaneously drained from the plurality of drainage ports. Preferably. In order to perform drainage, it is preferable to provide a drainage pipe for flowing seawater drained from the plurality of drainage ports to a total drainage port at a lower portion of the water tank, and the drainage pipe is opened and closed near the total drainage port. More preferably, a shutoff valve is provided. While the shutoff valve provided near the total drainage port of the drainage pipe is closed, drainage from the drainage port is not performed, and the seawater purified by the seawater purification layer passes through the gap at the lower end of the partition wall. After flowing into the purified water area, the circulation cycle will be closed. On the other hand, when the circulation cycle is temporarily stopped and fresh seawater is supplied from the outside, the shutoff valve may be opened, and drainage is rapidly performed from the plurality of drainage ports to the total drainage port through the drainage pipe. Thus, switching between the circulation system and the flowing water system can be easily performed by opening and closing the shutoff valve.

For example, it is preferable to provide a water supply pipe having a large number of holes for supplying seawater supplied by the circulation pump to the water tank at an upper portion of the water tank as a means for supplying water evenly to the entire water surface. In this manner, uniform seawater can be supplied to the entire water tank. In order to form a circulation cycle, it is preferable that a seawater in the purified water area be provided with a circulation passage for flowing the seawater through the water supply pipe. The circulation flow path may be used also as a seawater supply flow path for drawing seawater from outside the water tank, or may be provided separately from the seawater supply flow path and may be dedicated to the circulation system.

When replenishing fresh seawater from outside the circulation system,
It is convenient to provide a seawater supply tank outside the water tank as a supply source of seawater because it is not necessary to install the water tank right next to the sea. The seawater purification layer is preferably made of a fibrous material. Suitable fibrous materials are not only suitable as habitats for polychaetes, but also provide a place for the growth of nitrifying micro-organisms. The fibrous material is selected from those having good permeability to seawater and suitable for the growth of polychaetes and nitrifying microorganisms.

[0017]

Preferred embodiments of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view of a marine animal aquaculture tank system according to the present invention, FIG. 2 (a) is a schematic side view of the tank system according to the present invention, FIG. 2 (b) is a schematic plan view of the tank system in FIG. 2 (a), 3 and 4 are schematic partial side views of another embodiment of the purified water area and the pump portion of the aquarium system according to the present invention. FIG. 5 is a cross-sectional view of another embodiment of the aquarium system for marine animal aquaculture according to the present invention. FIG. In addition,
The present invention is not limited to the embodiments described herein, and includes configurations that can be modified and implemented without departing from the gist of the present invention.

In FIG. 1, this water tank has a stepped first tank.
And a second step 10b. A partitioning member 11 is supported on the first step 10a. The upper part of the partitioning member 11 is partitioned into a marine animal culture and living area 20 and the lower part is a drainage area 30. The cage 22 is a net-like sorting member 1 in the marine animal cultivation area 20.
1 and the cultured animal 21 is placed in the basket 22.
Are bred. The partitioning member 11 may be a net-like member, or a rod made of stainless steel or the like may be provided between the steps 10a. In this case, a basket or a net may be placed on the bar, or a basket may be directly placed between the steps 10a as a sorting member. The excrement and the remaining food from the cultured animal 21 naturally fall into the drainage section 30 through the gap of the sorting member 11. As the cultured animal 21, various marine animals such as mollusks, echinoderms, and fish can be bred.

In the drainage section 30, a porous pipe 35 is laid on the bottom surface of the water tank, and a porous material 34 that can pass through seawater is supported on the second step 10b. Porous material 3
A net 33 is laid on the upper part of 4, and a seawater purification layer 31 composed of a polychaete housing area is provided on the upper part. The seawater purification layer 31 is made of a fibrous material and serves as a place where the polychaete 32 is housed.
The polychaete 32 processes the excrement and residual food of the cultured animal 21 that has fallen from the marine animal culture and living area 20 to the drainage area 30, and plays a role in purifying seawater.

In the water tank system shown in FIG. 2A, the water tank is divided by a partition wall 3 into a main water tank area 1 and a purified water area 2. A gap 4 is provided between the lower end of the partition wall 3 and the bottom of the water tank, and the seawater can be circulated between the main tank area 1 and the purified water area 2 through the gap 4. A plurality of water outlets 40 are arranged on the bottom of the water tank. As will be described later, when excessive seawater is drained from the water tank, the seawater drained from these water outlets 40 passes through drain pipes 41 and 41a. And is discharged (overflow) from the total drain port A42. The height of the upper part of the drain pipe 41a having the total drain port A42 is the same as the height of the water surface of the water tank, and when the seawater in the water tank exceeds this certain water level, the overflow from the total drain port A42 occurs. This keeps the water level in the tank constant. This drain pipe 41a
The height of the upper part of is set to be adjustable. In addition, the drain pipe 41a should not be in a siphon state.
Is provided with an air intake port 45 at the top.

Normally, in this water tank system, seawater is circulated by a circulation system. In this case, the shutoff valve 43 provided near the total drainage port B44 is closed, and the seawater is circulated in the water tank system. In this case, the seawater purified by the seawater purification layer 31 in the main water tank area 1 is supplied to the circulation pump 5 provided in the purified water area 2.
By the action of 0, the water flows into the purified water area 2 through the gap 4 at the lower end of the partition wall 3. The circulation pump 50 sends out the seawater in the purified water area 2 to the marine animal cultivation and settlement area 20 through the circulation channel 6 and the water supply pipe 7 having a number of holes,
This forms a circulation cycle.

If the circulation of seawater is continued in such a manner, nutrients may accumulate in the closed circulation cycle. Therefore, the circulation cycle is temporarily stopped to maintain the freshness of the seawater, It is preferable to supply fresh seawater from the seawater and accompanying drainage. If the entire seawater needs to be changed, the system can be switched from the circulation system to the flowing water system. At this time, the shutoff valve 43 is opened, and the seawater can be removed from the total drain port B44. As described above, the seawater in the drainage section 30 is discharged from the plurality of drainage ports 40 arranged on the bottom of the water tank, through the drainage pipes 41 and 41b, and from the total drainage port B44. At this time, it is necessary to supply fresh seawater at the same time. However, in the case of the circulation system, the circulation pump 50 provided in the purified water area 2 is moved into the seawater tank 8 in which fresh seawater is stored. This is performed by diverting the circulation channel 6 to the seawater supply channel 5. Pump 5
The movement of 0 and the accompanying diversion of the circulation channel 6 to the seawater supply channel 5 are performed manually.

In the case of supplying / draining water from the outside of the water tank, that is, in the case of the flowing water system, the circulation pump 50 is provided with the seawater supply flow path 5 and a large number of holes for supplying fresh seawater in the seawater water supply tank 8. The water is supplied to the marine animal cultivation and settlement area 20 through the water supply pipe 7, whereby the water supply pipe 7
The uniform water supply from the top of the tank to the tank and the rapid drainage from a large number of drains 40 along the longitudinal direction of the bottom of the tank allow the water to flow between the top and bottom of the tank in the drainage area 30. There is no stagnation and it is homogeneous.

In FIG. 3, as another embodiment, a circulation channel 6a is provided in the purified water area 2 and a seawater supply channel 5a is provided in the seawater tank 8 separately.
A pump 51 is provided for sending seawater from a. Switching between the circulation system and the flowing water system is performed by switching off the seawater supply passage shutoff valve 9 provided in the seawater supply passage 5a.
a and a circulation passage shutoff valve 9b provided in the circulation passage 6a
Opening and closing is performed. That is, when the circulation method is performed, the valve 9a is closed and the valve 9b is opened. When the flowing water method is performed, the valve 9a is opened and the valve 9b is closed.

In FIG. 4, as still another embodiment, a circulation channel 6b is provided separately in the purified water area 2, and a seawater supply channel 5b is provided separately in the seawater tank 8, and each channel is provided. Separate pumps for feeding seawater are provided. Further, the communication between the circulation channel 6b or the seawater supply channel 5b and the water supply pipe 7 is switched by a switching valve 9c. Specifically, when the circulation method is performed, the switching valve 9c is switched so that the circulation flow path 6b and the water supply pipe 7 communicate with each other, and the pump 52 in the purified water area 2 is switched.
Is driven to pump seawater from the purified water area 2 through the circulation channel 6b and the water supply pipe 7 into the marine animal farming and habitat area 20.
c is switched so that the seawater supply passage 5b and the water supply pipe 7 communicate with each other, and the pump 53 in the seawater supply tank 8 is driven to drive the seawater supply tank 8 from the seawater supply passage 5b and the fresh water through the water supply pipe 7. Is supplied to the marine animal farming habitat area 20. The valves 9a, 9b, 9 described above
c and 43 may be manual or automatic.

In FIG. 5, as still another embodiment, steps 10a and 10b are formed as members projecting from the inner wall of the water tank. As described above, the steps according to the present invention include steps, protrusions, and the like.

According to the embodiment described above, the upper part of the sorting member 11 is the marine animal farming and habitat area 20 and the lower part is the drainage area 30. However, the present invention is limited to such an embodiment having a vertical relationship. Not something. The arrangement of the sorting member, the marine animal farming habitat area, and the drainage area is not limited to the positional relationship described above, and the embodiment of another array that forms the marine animal farming habitat area and the drainage area in the aquarium by the separating member is also described. Included within the framework of the invention.

[Brief description of the drawings]

FIG. 1 shows a marine animal aquarium system 1 according to the present invention.
Cross section of one embodiment

FIG. 2 (a) is a side cutaway schematic view of one embodiment of a marine animal aquarium system according to the present invention, (b).
(A) is a schematic plan view of the aquarium system of FIG.

FIG. 3 is a partial schematic side view illustrating another embodiment of the marine animal aquarium system according to the present invention.

FIG. 4 is a partial schematic side view illustrating still another embodiment of the marine animal aquarium system according to the present invention.

FIG. 5 is a cross-sectional view of another embodiment of the marine animal aquarium system according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main aquarium area 2 Purified water area 3 Partition wall 4 Gap 5 Seawater supply flow path 6 Circulation flow path 10a First step 10b Second step 11 Classification member 20 Marine animal culture and living area 30 Drainage area 31 From polychaete housing area Seawater purification layer 40 Drain 41 Drain pipe 42 Total drain A 43 Shut off valve 44 Total drain B 45 Air intake 50 Circulation pump

Claims (5)

[Claims] 1. A step is provided on an inner wall of an aquarium, and a partitioning member is supported on the step, and the partitioning member separates and forms a marine animal farming habitat area and a drainage area, and further excretes marine animals in the drainage area. An aquarium system for marine animal cultivation, characterized by providing a seawater purification layer consisting of a polychaete housing area for processing objects and remaining bait, and arranging a plurality of drainage ports on the bottom surface of the aquarium. 2. A partition wall is provided inside the aquarium to divide the aquarium into a main aquarium area and a purified water area comprising the marine animal farming habitat area and the drainage area. The aquarium system for marine animal cultivation according to claim 1, wherein a gap is provided between a lower end portion of the partition wall and a bottom surface of the aquarium so that seawater can be circulated therebetween. 3. The seawater in the main aquarium area purified by the seawater purification layer flows into the purified water area through a gap at a lower end of the partition wall, and the seawater in the purified water area is fed to a marine animal culture and living area. The aquarium system for marine animal cultivation according to claim 2, further comprising a circulation pump for feeding the ward to the ward. 4. The apparatus according to claim 1, further comprising a seawater supply passage for drawing seawater from outside the water tank, wherein the circulating pump sends out the seawater from the seawater supply passage to a marine animal cultivation and settlement area. 4. The aquarium system for culturing marine animals according to 3. 5. A drain pipe for flowing seawater drained from the plurality of drain ports to a total drain port at a lower portion of a water tank, wherein a shutoff valve that is opened and closed near the total drain port of the drain pipe is provided. The marine aquaculture aquarium system according to any one of claims 1 to 4, wherein the aquarium system is provided.