JPH07170879A - Water-exchange apparatus for culture pond and water-exchange method - Google Patents

Abstract

PURPOSE:To provide a water-exchange apparatus and a water-exchange method of a culture pond capable of exchanging water in a culture pond without spending power cost such as electric charges. CONSTITUTION:A shut-off valve 6 attached to an intake pipe 5 connecting the bottom of a culture pond 2 with the sea part 4A for intake is opened at high tide to effect the flow of seawater of the sea part 4A into the bottom of the culture pond 2 having lowered water level. The filthy water at the bottom of the culture pond 2 is pushed up to the surface side by this process. The filthy water on the surface of the culture pond 2 is flowed into a filthy water reservoir 3 having preparatorily lowered water level by opening a shut-off valve 8 attached to a filthy water delivery pipe 7 connecting the culture pond 2 and the filthy water reservoir 3. The shut-off valve 6 of the intake pipe 5 is closed when the levels of the culture pond 2 and the filthy water reservoir 3 reach the high tide level and a shut-off valve 10 attached to a discharge pipe 9 connecting the filthy water reservoir 3 and the discharging sea part 4B is opened at low tide to discharge the filthy water from the filthy water reservoir 3 to the sea part 4B for discharging.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water exchanging device and a water exchanging method for exchanging water in a culture pond for growing saltwater fish.

[0002]

2. Description of the Related Art In recent years, it has been shown as a fishery policy to grow juvenile fish to a size that does not feed other fish, and then to release and proliferate them. In line with this fishery policy, it has been practiced to provide a cultivation tank for aquaculture and to grow saltwater fish in this cultivation tank. However, simply installing a cultivation tank and storing seawater will result in excess surplus. Contamination of seawater in the growing tank increases and becomes noticeable due to food and excrement of saltwater fish.In general, the outside seawater is pumped into the growing tank and the dirty water in the growing tank is sequentially replaced. It corresponds by that.

[0003]

However, according to the above-mentioned conventional method of exchanging water, there is a problem that a large pump is required, so that the power cost such as an electric bill becomes expensive.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a water exchange device and a water exchange method for aquaculture ponds that can exchange water in the aquaculture ponds without power costs such as electricity bills. It is what

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is a water exchange device for exchanging water in aquaculture ponds for growing saltwater fish, the bottom surface being provided separately from the sea part. Is located at a position lower than the low water level of the sea area and at a position lower than the low water level of the intake sea area, and connects the bottom of the aquaculture pond with the external intake sea area at high tide or It is opened during the rising tide, and the seawater in the intake sea, which has a higher water level than the aquaculture pond, flows into the bottom of the aquaculture pond using the water level difference, and the sewage accumulated at the bottom of the aquaculture pond is collected along with the water in the aquaculture pond. An intake pipe with an on-off valve that pushes up to the surface side of the aquaculture pond is provided separately from the sea area and the aquaculture pond, and the bottom part is formed at a position below the low tide water level of the sea area to temporarily suspend the sewage from the aquaculture pond. Sewage collection pond and aquaculture pond A sewage pipe with an on-off valve that communicates with the sewage storage pond and is opened when the water level of the aquaculture pond is higher than the water level of the sewage storage basin and allows the sewage from the aquaculture pond to flow into the sewage storage basin using the water level difference. And, it connects the sewage reservoir and the sea for drainage, and it is opened during low tide or low tide,
The drainage pipe with an on-off valve for discharging the sewage in the surface seawater reservoir, which has a higher water level than the drainage sea part, to the drainage sea part by utilizing the water level difference.

Further, the present invention is a water exchange method for exchanging water in a culture pond for growing saltwater fish, comprising a culture pond for growing saltwater fish and a wastewater reservoir for temporarily collecting wastewater from the culture pond. The pond and the sea were separated from each other, and each bottom was formed so that it was below the low water level of the sea, and it was installed on the intake pipe that connects the bottom of the aquaculture pond to the external intake sea. By opening the on-off valve at high tide or during high tide, seawater in the intake sea area, which has a higher water level than that of the aquaculture pond that was previously set at a low water level, is allowed to flow into the bottom of the aquaculture pond using the water level difference, and the aquaculture is performed. While pushing up the filth accumulated at the bottom of the pond with the water in the aquaculture pond to the surface side of the aquaculture pond, the open / close valve provided in the sewage delivery pipe that communicates with the aquaculture pond from the aquaculture pond opens the surface side of the aquaculture pond. Sewage that has been pushed up to the low water beforehand When the water level of the aquaculture pond and the wastewater storage pond reaches the high tide level of the sea, the on-off valve of the intake pipe is closed and the drainage pipe that connects the wastewater storage pond with the drainage sea. By opening the on-off valve at the time of low tide or ebb tide, the sewage in the sewage sump, which has a higher water level than the sea for drainage, is discharged to the sea for drainage using the water level difference, and the aquaculture pond and wastewater sump It lowers the water level in the pond.

[0007]

[Operation] With the water exchange device and water exchange method for the aquaculture pond, the water in the aquaculture pond can be exchanged by simply opening and closing each on-off valve by utilizing the ebb and flow of the tide. Therefore, the maintenance cost can be reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a bank-like structure constructed facing the sea, and provided with a culture pond 2 for growing saltwater fish and a wastewater storage pond 3 for temporarily collecting the wastewater from the culture pond 2. The
The aquaculture pond 2 and the wastewater storage pond 3 are respectively located in the outer sea 4 (4
A, 4B). The sewage pond 3 is a little deeper than the low water level LWL of the sea 4 and is formed relatively shallow, while the aquaculture pond 2 is formed deeper than the sewage pond 3 and the aquaculture pond 2 is at the low water level LWL. Even if the water level is the same as above, it is formed to a depth that allows saltwater fish to be raised without any problems.

Reference numeral 5 denotes an intake pipe for communicating the bottom of the aquaculture pond 2 with the offshore part of the sea 4A serving as an external water intake sea part so that clean seawater in the offshore part flows into the aquaculture pond 2. It is extended substantially horizontally at a position lower than the water level LWL, and an opening / closing valve 6 is provided at an intermediate position. Reference numeral 7 is a sewage delivery pipe for connecting the aquaculture pond 2 and the sewage reservoir 3 to allow the sewage from the aquaculture basin 2 to flow into the sewage reservoir 3, and a plurality of different heights are provided in the range from the low tide level LWL to the high tide level HWL. The number (three in FIG. 1) is extended, and an on-off valve 8 is attached to each sewage delivery pipe 7. Further, 9 is a drainage pipe for communicating the wastewater reservoir 3 and the drainage sea part 4B to discharge the wastewater in the wastewater reservoir 3 to the drainage sea part 4B, which is almost at the low water level L.
It is extended horizontally at the height of WL, and an on-off valve 10 is provided at an intermediate position.

Next, a procedure for exchanging water in the aquaculture pond 2 in these configurations will be described. First, the open / close valve 6 of the intake pipe 5 and the open / close valve 8 of the dirty water delivery pipe 7 are opened at the time of high tide or at the time of high tide approaching the time of high tide. At this time, the opening / closing valve 10 of the drainage pipe 9 is closed, and the aquaculture pond 2 is set in advance to a water level substantially equal to the low tide water level LWL. Therefore, the sea 4A
Seawater from the offshore part of the sea uses the water level difference to raise aquaculture pond 2
The filth that flows into the bottom of the aquaculture pond 2 and is collected at the bottom of the aquaculture pond 2 is pushed up to the surface side as the sewage together with the seawater in the aquaculture pond 2. In addition, at this time, the wastewater reservoir 3 is also set at the low water level L in advance.
The water level is almost the same as WL, and the sewage pushed up to the surface side in the aquaculture pond 2 flows into the sewage storage pond 3 through the sewage delivery pipe 7.

After that, at high tide, when the water levels of the aquaculture pond 2 and the wastewater storage pond 3 reach the high tide level HWL, the on-off valve 6 of the intake pipe 5 and the on-off valve 8 of the contaminated water delivery pipe 7 are closed. . As a result, the water levels of the aquaculture pond 2 and the wastewater storage pond 3 are maintained at the high tide water level HWL, the wastewater from the aquaculture pond 2 is stored in the wastewater storage pond 3, and the wastewater stored in the wastewater storage pond 3 is cultured. Backflow into the pond 2 is prevented.

Next, when the tide is low or when the tide approaches the low tide, the opening / closing valve 10 of the drain pipe 9 is first opened. As a result, the drainage sea portion 4B is passed through the drainage pipe 9 until the wastewater stored in the wastewater storage pond 3 almost reaches the low water level LWL.
Is discharged to. After that, the open / close valve 8 of the contaminated water delivery pipe 7 is also opened, and the water in the aquaculture pond 2 is contaminated with the contaminated water delivery pipe 7 and the wastewater reservoir 3
And it discharges to the drainage sea part 4B through the drainage pipe 9.
Then, when the water levels of the aquaculture pond 2 and the wastewater storage pond 3 reach the low water level LWL, the on-off valves 8 and 10 of the contaminated water delivery pipe 7 and the drainage pipe 9 are closed.

As described above, the water in the aquaculture pond 2 can be exchanged by simply opening and closing the on-off valves 8, 9, 10 while utilizing the ebb and flow of the tide, so that the power cost such as electricity bill is not required. ,
Maintenance costs can be reduced. In addition, since the sewage accumulated at the bottom of the aquaculture pond 2 is pushed up to the surface side of the aquaculture pond 2 and flows into the sewage reservoir pond 3, particularly dirty sewage in the aquaculture pond 2 can be discharged to the outside. The pond 2 can be cleaned efficiently.

At low tide or at low tide approaching low tide, the open / close valve 10 of the drainage pipe 9 is opened to open the wastewater reservoir 3
After discharging the sewage up to about the low water level LWL, the on-off valve 10 of the drainage pipe 9 is closed and then the contaminated water delivery pipe 7
It is also possible to open the on-off valve 8 and discharge the water from the aquaculture pond 2 to the wastewater storage pond 3, but in this case, until the water levels of the aquaculture pond 2 and the wastewater storage pond 3 match. The wastewater of No. 2 will flow into the wastewater storage pond 3.

A check valve which allows the inflow of water only to the sewage reservoir 3 side may be used as the opening / closing valve 8 of the contaminated water delivery pipe 7. In this case, opening / closing work by a person is unnecessary. .
Further, in this embodiment, the bank 1 is used to form the aquaculture pond 2 and the wastewater storage pond 3, but it should be pointed out that the aquaculture pond 2 and the wastewater storage pond 3 may be formed using a water tank or the like. Nor.

[0016]

As described above, according to the present invention, the water in the aquaculture pond can be exchanged by simply opening and closing the on-off valve by utilizing the ebb and flow of the tide, so that the power cost such as electricity bill is not required. The maintenance cost can be reduced. Further, since the sewage accumulated at the bottom of the aquaculture pond is pushed up to the surface side of the aquaculture pond to flow into the sewage storage pond, the sewage is discharged to the outside, so that the aquaculture pond can be efficiently cleaned.

[Brief description of drawings]

FIG. 1 is a sectional view of a water exchange device for an aquaculture pond according to an embodiment of the present invention.

[Explanation of symbols]

 2 Aquaculture Pond 3 Sewage Reservoir 4A Sea (sea part for intake) 4B Sea part for drainage 5 Intake pipe 6 Open / close valve for intake pipe 7 Sewage delivery pipe 8 Open / close valve for wastewater delivery pipe 9 Drain pipe 10 Open / close valve for drainage pipe

Claims (2)

[Claims] 1. A water exchanging device for exchanging water in a culture pond for cultivating saltwater fish, the aquaculture being provided separately from the sea portion and having a bottom portion at a position lower than the low water level of the sea portion. It is provided at a position lower than the low water level of the water intake sea part, and connects the bottom of the aquaculture pond with the outside water intake sea part,
It is opened at high tide or during high tide, and the seawater in the intake sea, which has a higher water level than the aquaculture pond, flows into the bottom of the aquaculture pond by using the water level difference, and the sewage accumulated at the bottom of the aquaculture pond is in the aquaculture pond. The intake pipe with an on-off valve that pushes it up to the surface side of the aquaculture pond together with the water of the aquaculture pond and the bottom of the aquatic pond are formed separately from the sea and the aquaculture pond, and the bottom part is formed below the low tide water level of the sea. The wastewater from the aquaculture pond is opened when the water level of the aquaculture pond is higher than the water level of the wastewater storage pond. The sewage water discharge pipe with an on-off valve that allows the water to flow into the sewage reservoir by communicating with the sewage reservoir and the drainage sea area, and is opened during low tide or low tide, and the surface seawater reservoir basin has a higher water level than the drainage sea area. Sewage using the water level difference Water exchange apparatus ponds, characterized in that a closing valve with the drain pipe for discharging the sea for water. 2. A water exchange method for exchanging water in aquaculture ponds for growing saltwater fish, comprising a culture pond for growing saltwater fish and a wastewater storage pond for temporarily collecting wastewater from the culture pond, respectively. An on-off valve provided in the intake pipe that is provided separately from the sea part and is formed so that each bottom part is below the low water level of the sea part and that connects the bottom part of the aquaculture pond and the external intake sea part, By opening at high tide or high tide, the seawater in the intake sea area, which has a higher water level than the water level of the aquaculture pond previously set to a low level, is made to flow into the bottom of the aquaculture pond using the water level difference, and then to the bottom of the aquaculture pond. While pushing up the accumulated waste with the water in the aquaculture pond to the surface side of the aquaculture pond, it was pushed up to the surface side of the aquaculture pond by opening the on-off valve provided in the wastewater delivery pipe that communicates with the aquaculture pond from the aquaculture pond. Wastewater reservoir with low water level When the water level of the aquaculture pond and the wastewater storage pond reaches almost the high tide level of the sea, the intake pipe on / off valve is closed and the drainage pipe that connects the wastewater storage pond and the drainage sea is opened / closed. By opening the valve at low tide or during low tide, the sewage in the sewage pond, which has a higher water level than the drainage sea, is discharged to the drainage sea using the water level difference, and the water levels in the aquaculture pond and the sewage pond are increased. A method for exchanging water in an aquaculture pond, characterized by lowering the water content.