JPH1156164A - Aeration system for fish culture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject system designed to efficiently conduct a fish culture through replenishing oxygen into a fish preserve as well as suppressing bacterial propagation. SOLUTION: This aeration system for fish culture has such a scheme that a diffusing member 16 is suspended inside a fish preserve made of net 12 and air bubbles are generated from the diffusing member 16 by compressed air feed from an air compressor 3; a chlorine gas or the like generated from a seawater electrolyzer 17 set up in the proximity of the diffusing member 16 also rises as advection current together with the air bubbles and is then guided to a surrounding wall 18 and descends, resulting in producing a convection current; thereby oxygen is replenished through dissolution of the air bubbles into seawater and bacterial propagation in the fish preserve is suppressed owing to the chlorine gas or the like, thus a fish culture in the fish preserve is efficiently conducted in high survival rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration apparatus for aquaculture which is capable of generating air bubbles in a cage provided in the sea for aquaculture of fish to supply oxygen.

[0002]

2. Description of the Related Art In a conventional culture aeration apparatus,
Compressed air is sent by an air compressor to a diffuser pipe along a net of underwater cages to generate air bubbles from the diffuser pipe.

[0003]

By the way, in the aeration apparatus for aquaculture as described above, although the oxygen content can be supplied to the fish in the cage, the survival rate of the fish is prevented from being reduced by the bacteria generated in the cage. I can't. Therefore, an object of the present invention is to provide an aeration apparatus for aquaculture that enables efficient aquaculture of fish by suppressing the growth of bacteria at the same time as replenishing the oxygen content in the cage. .

[0004]

In order to solve the above-mentioned problems, a culture aeration apparatus according to the present invention is connected to the outlet of an air compressor via a pipe, and hangs inside an underwater cage to spray air bubbles. With a diffuser member
A seawater electrolyzer is provided near the air diffusing member so as to discharge the electrolysis products into the sea.

[0005] In the above-mentioned aeration apparatus for aquaculture of the present invention, in the vicinity of the air diffuser for spraying air bubbles into the living cage,
The bubbles of chlorine gas generated by the seawater electrolyzer and the solutes of caustic soda ride on the flow that rises with the air bubbles from the air diffusion member, and rise and diffuse together, so that the air The supply of oxygen for fish by dissolving a part of the foam into the water in the cage, and the above-mentioned chlorine gas and caustic soda solute, combined with the effect of suppressing the growth of bacteria in the cage, reduce the environment in the cage. It will improve fish survival and improve their aquaculture efficiency.

[0006] The aeration device for aquaculture of the present invention is a DC generator driven by the same engine as an air compressor driven by the engine on a floating body floating on the sea adjacent to an underwater cage. And a diffusing member that is connected to the outlet of the air compressor via a pipe and hangs down inside the cage to spray air bubbles, and is supplied with power from the DC generator in the vicinity of the diffusing member. A seawater electrolyzer is provided so as to discharge the electrolysis product into the sea, so that the air bubbles and the advection of the electrolysis product are circulated by the convection effect in the shovel, An upper wall is provided with an enclosing wall for guiding the advection downward.

[0007] As described above, the air compressor that sends compressed air to the air diffusing member in the living cage and the DC generator that feeds power to the seawater electrolyzer near the air compressor include:
If it is driven by the same engine and mounted on a floating body adjacent to the cage, the overall configuration is greatly simplified, and the connection between the air compressor and the air diffusion member and the DC power generation There is also an advantage that the connection between the machine and the seawater electrolyzer is facilitated.

[0008] The advection of seawater containing air bubbles from the air diffusing member and products generated from the seawater electrolysis apparatus is as follows:
If it is configured to be guided downward by the surrounding wall provided on the upper periphery of the cage, the advection circulates up and down due to a convection effect, and replenishes the oxygen content and generates the electrolysis over a wide area inside the cage. Since the application of the objects is performed accurately, fish cultivation can be performed more efficiently.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a culture aeration apparatus according to an embodiment of the present invention; FIG. As shown in FIG. 1, a fish cage 11 is formed by a net 12 suspended in the sea by a float 13 floating on the sea surface, and the floating body 1 is adjacent to the fish cage 11 via a mooring line 7 and a sinker (not shown) on the sea floor. Moored in

The floating body 1 is equipped with an engine 2, an air compressor 3 driven by the engine 2, and a DC generator 4 shared by the engine 2 and driven by the engine 2. .

An air diffusion member 16 is provided inside the living cage 11 and suspended from the buoy 14 via a wire 15. The air diffusion member 16 receives compressed air from the air compressor 3 via the pressure-resistant hose 5. It is being sent.

The diffuser member 16 is formed in a circular shape as a whole, and can be present at a substantially constant position while maintaining a balance by blowing air bubbles radially from a number of nozzle holes formed along the outer peripheral wall. It has become.

Further, a seawater electrolyzer 17 suspended from a diffuser member 16 by a wire 17a is provided so as to discharge the electrolysis products into the sea, and the seawater electrolyzer 17 has a floating body. Power is supplied from a DC generator 4 mounted on the power supply 1 via a cable 6.

The seawater electrolyzer 17 generates chlorine gas and generates sodium by electrolysis of seawater (brine), and this sodium immediately reacts with the water content of seawater to generate caustic soda and hydrogen gas.

[0015] The seawater electrolyzer 17 contains the air bubbles from the air diffuser 16 and the seawater electrolysis device 17 causes the seawater to induce an upward advection. The advection reaches the vicinity of the sea surface and causes a U-turn. An enclosing wall 18 for guiding the water to flow downward is provided on the inner periphery of the upper edge of the living pens 11. In this way, the advection circulates in the cage 11 due to the convection effect.

In the culture aeration apparatus of the present embodiment, chlorine gas bubbles and solutes of caustic soda generated by the seawater electrolyzer 17 are located in the vicinity of the air diffuser 16 for spraying air bubbles into the fish cage 11. However, they ride on the flow that rises with the air bubbles from the diffusing member 16, and rise and diffuse together.

Then, a part of the air bubbles is dissolved into the water in the creature 11 to replenish the oxygen content for the fish, and the chlorine gas and the caustic soda solute content are added to the creature 11.
Combined with the effect of inhibiting the growth of bacteria in the fish, the environment in the cage is improved, the survival rate of fish is increased, and the aquaculture is carried out efficiently.

Further, as described above, the air compressor 3 for sending compressed air to the air diffusing member 16 in the living cage 11 and the DC generator 4 for feeding power to the seawater electrolyzer 17 near the air compressor 3 are the same. When it is mounted on the floating body 1 adjacent to the fish cage 11 by being driven by the engine 2, the overall configuration is greatly simplified, and the connection between the air compressor 3 and the air diffusing member 16 and the DC power generation There is also an advantage that the connection between the machine 4 and the seawater electrolyzer 17 is facilitated.

The advection of seawater containing air bubbles from the air diffuser 16 and products from the seawater electrolyzer 17 is guided downward by the surrounding wall 18 provided on the upper peripheral edge of the living pens 11. As a result, the advection circulates up and down due to the convection effect, so that the supply of oxygen and the spraying of the electrolysis products can be accurately performed over a wide range of the inside of the fish cage 11, so that fish cultivation is more efficient. Will be done well.

[0020]

As described in detail above, the following effects and advantages can be obtained by the aeration apparatus for aquaculture of the present invention. (1) In the vicinity of the air diffuser for dispersing air bubbles in the living cage, bubbles of chlorine gas generated by the seawater electrolyzer and solutes of caustic soda rise with the air bubbles from the air diffuser. As it gets on the stream, it rises and spreads together, it replenishes oxygen for fish by dissolving part of the air bubbles into the water in the cage, and the chlorine gas and caustic soda solute Combined with the effect of inhibiting the growth of bacteria in the cage, the environment in the cage is improved,
The survival rate of the fish is improved, and the aquaculture is performed efficiently. (2) The air compressor that sends compressed air to the air diffusing member in the cage and the DC generator that supplies power to the seawater electrolyzer near the air compressor are driven by the same engine, Equipped with the adjacent floating body greatly simplifies the entire configuration, and facilitates the connection between the air compressor and the air diffusion member and the connection between the DC generator and the seawater electrolyzer. There are advantages too. (3) The advection of seawater containing air bubbles from the air diffuser and products generated from the seawater electrolyzer is guided downward by the surrounding wall provided on the upper periphery of the fish cage. And the advection circulates up and down due to the convection effect, so that the replenishment of the oxygen content and the spraying of the electrolysis products over a wide range inside the fish cage are performed accurately, and the fish cultivation is performed more efficiently. Will be able to

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing the overall configuration of a culture aeration apparatus as one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floating body 2 Engine 3 Air compressor 4 DC generator 5 Pressure-resistant hose 6 Cable 7 Mooring line 11 Life cage 12 Net 13 Float 14 Buoy 15 Wire 16 Air diffusing member 17 Seawater electrolyzer 17a Wire 18 Enclosure wall

Claims (2)

[Claims] An air compressor is provided with an air diffuser connected to an air outlet of an air compressor through a pipe and suspended inside an underwater cage to spray air bubbles, and a seawater electrolyzer is provided near the air diffuser. An aeration apparatus for aquaculture, wherein the aeration apparatus is provided so as to release the electrolysis product into the sea. 2. A floating body floating on the sea adjacent to an underwater cage, comprising an air compressor driven by an engine and a DC generator driven by the engine in common with the engine. A seawater electrolyzer, which is connected to the outlet via a pipe and has a diffusing member that hangs down inside the cage and disperses air bubbles, and near the diffusing member, is supplied with seawater electrolyzed power from the DC generator. It is provided so as to discharge the electrolysis product into the sea, and guides the advection downward to the upper periphery of the same cage in order to circulate the air bubbles and the advection of the electrolysis product by the convection effect in the cage. An aeration device for aquaculture, characterized in that a surrounding wall is provided.