KR20010078367A - Purification Method For Cultured Water And Apparatus Of The Same - Google Patents

Abstract

PURPOSE: Cleaning method of cultivation water and device therefor are provided, which increase dissolved oxygen by generating a jet stream due to a Coanda effect in cultivation water such as seawater and fresh water, and mixing air into the jet stream. CONSTITUTION: The jet stream is generated by jetting seawater jetted from a jet nozzle(11) into a jet stream generation room(12). The seawater coming in the jet stream generation room(12) enters the jet stream generation room(12) together with air. Energy is lost by the jet stream accompanied by attachment bubble, attachment jet or the like due to Coanda effect, while air and seawater are uniformly mixed and agitated. The seawater in which the seawater and air were uniformly mixed and agitated, increase the dissolved oxygen greatly. The jet stream going out from the jet stream generation room(12) becomes foams to float on a seawater surface together with air bubbles. At this time, the impurities are discharged from a water discharge pipe to the outside of a cultivation tank together with air bubbles.

Description

Purification Method for Cultured Water and Apparatus Of The Same

The present invention relates to a method and apparatus for purifying aquaculture water for purifying aquaculture water such as seawater and fresh water. More specifically, the present invention relates to a method for purifying aquaculture water and apparatus for purifying aquaculture water, such as seawater and fresh water, which are necessary for farming fish, shellfish, and the like.

Recently, due to the depletion of resources, fish, known as high-quality fish such as flounder and blowfish, have been growing due to the development of aquaculture technology. These cultures also have sea sponge cultures by rafts, but problems such as pollution of the sea caused by feed and fish droppings, destruction of the rafts by typhoons, and difficulty in feeding fish to fish because they are at sea. Increasingly, farming tanks are installed on the land and farming is being increased.

This terrestrial farming system also uses seawater from the sea, which is always scooped out from the sea, circulated inside the farming tank, and the old seawater is discarded into the sea as it is. It is becoming. However, it is difficult to uniformly replace old seawater and newly spread seawater in aquaculture tanks, and if possible, a large-capacity pump is needed, and as a result, the amount of energy used increases, leading to an increase in aquaculture cost. . Therefore, it is desirable that this new seawater is pumped in as little as possible.

In addition, because the seawater is used in large quantities, the place of installation of the aquaculture equipment is a seaside zone facing the remote islands and the external sea where the seawater can pump up large quantities of virtually no pollution. It is limited to areas with good location conditions, such as 地帶). The farming of freshwater trout, which grows in freshwater such as tiger trout and gondling, has the same problem. Against this background, even if a large amount of seawater is supplied, even if the aquaculture device is used once and always flows, the wastes of the fish settle or float on the bottom of the aquaculture tank, and the seawater in the aquaculture tank Contamination is inevitable. In other words, the seawater in aquaculture tanks is not replaced and replaced by circulation.

The seawater of the culture tank contains parasites, ammonia, carbon dioxide, etc. in addition to the excreta of the fish, and since they inhibit the growth of the fish, it is necessary to exterminate or remove them as much as possible. Among these, the applicant has proposed a method and apparatus for generating cavitation and decomposing them (Japanese Patent Laid-Open No. 11-319819 and Japanese Patent Laid-Open No. 2000-563).

When the proposed cavitation generator is used to purify the aquaculture tank, it effectively works, destroying parasites, eggs, E. coli, and removing carbon dioxide and ammonia. However, it is not necessarily optimal to apply it to aquaculture systems where water is used once, thrown once, and discarded all the time. In particular, it is desirable to keep the amount of dissolved oxygen at a certain amount as well as to purify the water in a culture tank in which water is used once and always flows.

This is because the amount of dissolved oxygen in the seawater varies with seawater temperature, season, algae, and the like, and is not constant. In some cases, seawater with red tide should be pumped out. When these seawater is poured into aquaculture tanks where water is used once and discarded, the fish may die due to lack of oxygen. For this reason, the amount of dissolved oxygen is increased by blowing air or oxygen from small holes or the like arranged in a water tank. However, this method alone is difficult for oxygen to dissolve in seawater and does not increase the effect very much. Therefore, a method of injecting air and oxygen from the pumping side of the submersible pump, stirring the water with the blades of the submersible pump to form microbubbles, and spraying it into the water has been adopted.

However, in this method, in order to suck in air from the pumping side of the pump, the same phenomenon occurs as the pump causing the pumping failure, and sometimes the seal and the blade of the pump are broken. For this reason, the pump parts must be replaced or repaired frequently. The same thing has the same problem in the culture of freshwater fish.

The present invention has been made under the technical background as described above, and achieves the following objects.

It is an object of the present invention to provide a method and apparatus for purifying aquaculture water which can increase the amount of dissolved oxygen in aquaculture water such as seawater and fresh water.

Another object of the present invention is to provide a method and apparatus for purifying aquaculture water which can separate and remove contaminants such as organic matters in aquaculture water such as seawater and fresh water by foam.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the cross section of the aquaculture tank in which the aquaculture water purification apparatus of this invention was installed.

2 is a cross-sectional view showing a cross section of the cultured water purifying apparatus of the present invention.

3 is a cross-sectional view of the raft when the cultured water purification device of the present invention is installed on the raft.

Figure 4 is a plan view of the raft when the cultured water purification apparatus of the present invention is installed on the raft.

Fig. 5 shows the classification occurrence of another embodiment.

Figure 6 shows that the classification of another embodiment occurs.

Figure 7 shows that classification of another embodiment occurs.

(A), (b) and (c) of FIG. 8 show that the classification of another embodiment occurs, (a) is an external view, (b) is a cutaway view taken along the bb line of (a), ( c) is a sectional view cut | disconnected by the cc line | wire of (a).

<Explanation of symbols for main parts of drawing>

1: Aquaculture tank

4: drainage pipe

9, 52, 70, 80, 90, 100: classification occurs (噴 流 發生 函)

10, 50: Aquaculture water purification device

11, 51: injection nozzle

12, 52: Classification occurrence chamber

15, 55: pump unit

13: discharge tube

18, 58: air suction pipe

20: outer tube

30: Raft

75, 105: 1st class generating room

76, 106: 2nd class generating room

77, 107: 3rd Classification Generation Room

78, 108: 4th Classification Room

109: Class 5 Generation Room

110: 6th Classification Room

111: 7th Classification Room

112: 8th Classification Room

The present invention employs the following means to achieve the above object.

The method for purifying aquaculture water of the present invention pressurizes the cultured water that raises the living organism, and sprays the nozzle substantially downward in a vertical direction. The cultured form in which the cultured water and the gas are stirred and mixed in a space partitioned by the gas, and the stirred and mixed form is discharged from the discharge port in the vertical direction of the space. It is characterized in that the water and the gas spouting.

Aquaculture water in the present invention does not mean only seawater and freshwater for artificially growing fish and shellfish. In order to purify seawater and lakes, air or oxygen may be blown to activate microbial activity. Therefore, in the present invention, natural seawater, lakes and river waters are defined as aquaculture water.

The classification is accompanied by a coanda effect, a wall attachment phenomenon, in which the aquaculture water is attached to the wall surface of the space. When the jet is sprayed, an adhesion whirlpool, which is a low pressure whirlpool, is generated in the vicinity of the jet by the Coanda effect, and the jet classification occurs in the jet. The cultured water and the gas are uniformly stirred and mixed by the deposition vortex and the adhesion classification. When the foam generated on the surface of the cultured water is discharged from the culture tank, the cultured water in the culture tank is purified.

The aquaculture water does not mean only aquaculture water in aquaculture tanks. Aquaculture water may be divided into rafts arranged at sea level or lake surface. In this case, the foam generated at the surface of the aquaculture water is discharged out of the area partitioned by the raft.

The cultured water purifying apparatus of the present invention includes nozzles (11, 51, 73, 83, 93, 103) for pressurizing the cultured water and spraying substantially downward in the vertical direction, and the nozzles (11, 51, 73, 83, 93). , The air supply pipes 18 and 58 for sucking air and the pressurized pump 15 for supplying the pressurized water to the nozzles 11, 51, 73, 83, 93, and 103. 55) and a fractionation generating chamber 21, 75 to 78, 85 for forming a fraction for agitating and mixing the aquaculture water and the air, having a space substantially partitioned by sucking air at the same time as the injection. 95, 105 to 112, and discharge ports 14 and 65 for discharging the agitated and mixed cultured water and the air from the flow dividing generating chambers 21, 75 to 78, 85, 95 and 105 to 112. Is done.

The inner space V of the classification generating chambers 21, 75-78, 85, 95, 105-112 is coplanar when a plurality of three-dimensional box-shaped spaces are flat. do.

In addition, the internal space V of the classification generating chambers 21, 75 to 78, 85, 95, 105 to 112 is flat in a three-dimensional box-shaped space, and the thickness in the substantially horizontal direction of the space is H, Let its approximate width be W and the length in the vertical (vertical) direction be L,

When the effective diameter of the aperture (開口) of the nozzle (11) with D _1, D ₁ is good if the relation <H, W / H> 4 , also H <L. More preferably, it exists in the relationship of W <L.

The air supply pipes 18 and 58 may be disposed coaxially with the nozzles 11, 51, 73, 83, 93, 103. Moreover, it arrange | positions so that it may cover the outer periphery of the discharge pipe 13 which communicated with the said discharge port 14, and spreads the said culture water from one end, and the said from the other end. What is necessary is just to make it the outer periphery pipe 20 for simultaneously discharging the agitated and mixed cultured water and the air by suction.

The discharge tube 13 is L-shaped, one end is connected to the discharge port 14, the other end may be provided with a discharge port 14 in the horizontal direction.

Embodiment 1

EMBODIMENT OF THE INVENTION Hereinafter, Embodiment 1 of this invention is described according to drawing. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the cross section of the culture tank which installed the culture water purification apparatus of this invention. 2 is a cross-sectional view showing a partial cross section of the cultured water purification device. The aquaculture tank 1 is made of steel plate, stainless steel plate, or FRP, and is an open top tank. The aquaculture tank 1 is a container for filling seawater with a seawater, and for farming sea fish such as flounder and puffer fish, and has a capacity to contain enough seawater for farming.

The aquaculture tank 1 is always supplied with sea water from the sea through a supply pipe 3 by a pump 2. For this reason, the seawater in the aquaculture tank 1 is always filled with clean seawater. The drainage pipe 4 is arrange | positioned at the center part of the culture tank 1 in a perpendicular direction. The upper end of the drain pipe 4 is opened, and this opening position is the surface of the seawater in the culture tank 1.

The lower end of the drain pipe 4 is opened through the bottom plate 5 of the culture tank 1. Therefore, the drain pipe 4 is equipped with the function which keeps the water surface of the culture tank 1 at a constant height, and discharges the foam mentioned later. The aquaculture water purifier 10 is a means for forming a jet in order to stir and mix seawater and air as a main function as described later. The aquaculture water purifying apparatus 10 includes a jet nozzle 11 for injecting seawater, a jet generating device 9 for forming a fraction for agitating and mixing the jetted seawater and air, and a pump unit for pressurizing the seawater ( 15) and the like (see FIG. 2).

The whole system of the culture water purification apparatus 10 is arrange | positioned so that it may be submerged in the water in the culture tank 1. The pump unit 15 pressurizes the seawater, and the pressurized seawater is supplied to the injection nozzle 11 through the supply pipe 16. The pump unit 15 is a unit which consists of a pump which pressurizes seawater (0.1 MPa in this example), an electric motor which drives it.

That is, the pump unit 15 has a function of sucking seawater from the bottom of the aquaculture tank 1 through the suction port 17, pressurizing it, and supplying it to the injection nozzle 11. The seawater discharged from the pump unit 15 is controlled within a range of discharge pressure and flow rate set by a control circuit (not shown). The internal structure of the classification generating chamber 12 is mentioned later. The main function of the cultured water purifying device 10 is to increase the amount of dissolved oxygen in the seawater. At the same time, the aquaculture water purifier 10 also has a function of decomposing parasites, powder, residues of feed, and the like by the cavitation action generated by the spray nozzle 11.

The sorting occurrence 9 is of flat rectangular shape and is arrange | positioned so that the longitudinal direction may become perpendicular. An injection nozzle 11 for spraying the pressurized seawater downward is fixed to the upper surface of the jet generating box 9. The injection nozzle 11 is a cylindrical annular space in cross section. The sorting generating chamber 12 partitioned inside the sorting box 9 is formed. The internal space V of the classification generating chamber 12 is flat in a three-dimensional box-like space, the thickness of the space is approximately H in the horizontal direction, and the width thereof is approximately W, the length of the vertical (vertical) direction. When L is set and the effective diameter of the opening of the injection nozzle 11 is D ₁ , the relationship is D ₁ <H, W / H> 4, and H <L. However, it is preferable to exist in the relationship of W <L.

The main stream ejected from the injection nozzle 11 is injected in the direction of the center line of the internal space V in the vertical direction. When the main jet is sprayed, a sticking whirlpool, which is a low pressure whirlpool, is generated in the eight corners of the jet generating chamber 12 by the Coanda effect, and a jet classification is generated in the main jet. Therefore, although the main stream as shown in Fig. 2 flows in one of two directions, the stream is generated unstable, and the flow is switched to the other stream. In other words, the main classification is unstable and fluctuates and flows occur. These classifications have the function of uniformly mixing and stirring liquids and gases such as seawater and gas, seawater and chemicals.

This Coanda effect may not be the above-described dimensional condition, but preferably, when the above-described dimensional condition is used, classification occurs in the internal space V as shown in the drawing, and this classification flows in a direction biased in either direction. Indicates and shakes alternately. The lower end of the air suction pipe 18 is fixed to the center of the injection nozzle (11). The air suction pipe 18 is for drawing air from the air by the negative pressure of the seawater discharged from the injection nozzle 11. Therefore, the air is sucked from the lower end of the air suction pipe 18 together with the seawater jetted from the injection nozzle 11.

One end of the discharge pipe 13 bent in an L shape is connected to the lower end of the flow generating chamber 12. The discharge pipe 13 is disposed so that its upper end faces in the vertical direction, and is continuously bent in the horizontal direction. The discharge port 14 which is the tip of the discharge tube 13 faces the horizontal direction parallel to the surface including the bottom part of the culture tank 1. On the outer circumference of the horizontal portion 19 of the discharge tube 13 bent in an L shape, the outer circumferential tube 20 is disposed in the horizontal direction so as to cover the horizontal portion 19 and to have a gap coaxially. It is. The front end of the outer circumferential tube 20 is a discharge port 21, and the rear end forms a suction port 22. The outer periphery pipe 20 is for sucking in seawater from the bottom of the aquaculture tank 1. When seawater is discharged from the discharge port 14, the seawater is sucked out from the suction port 22 of the outer peripheral pipe 20.

work

In the structure as described above, the injection nozzle 11 has the following functions. The main stream ejected from the jet nozzle 11 is jetted in the direction of the center line of the internal space V in the vertical direction. When the main jet is sprayed, the adhesive whirlpool, which is a low pressure whirlpool, is generated at the 8 corners of the jet generating chamber 12 by the Coanda effect. From the plane cut off from the flat plane of the classification generating chamber 12 by this adhesion classification, the main classification branches in one direction and swings in either direction. However, the arrow showing the flow shown in FIG. 2 is shown for convenience in order to show the flow in any cross section.

This main fraction enters the fractionation chamber 12 together with the air. Although the seawater and air entering the fractionation generating chamber 12 lose energy due to the fractionation accompanied by the co-wetting effect due to the Coanda effect, the fractionation, etc., both are uniformly mixed and stirred. The dissolved oxygen in seawater is dramatically increased by the mixing of seawater and air. At the same time, a slight cavitation occurs at this time, and by this action, ammonia, nitrogen nitrate, carbon dioxide, chlorine, oxygen, and the like in the seawater are degassed.

In addition, the action of destroying, sterilizing and killing parasites of fish in fish, parasite eggs, larvae, E. coli and the like has been recognized. The air that has not been dissolved in the seawater by the air entering the internal space V of the fractionation generating chamber 12 tries to escape from the fractionation generating chamber 12, but is not simply discharged due to the attraction of the seawater injection. As a result, this balanced amount of air flows into the fractionation generating chamber 12 and the residence time in the introduced internal space V becomes long, so that air is sufficiently dissolved in seawater.

Therefore, the amount of air components such as dissolved oxygen in seawater increased rather than the stem by the fractionation action. According to the experiment, dissolved oxygen was 4.61 ppm to 6.12 ppm in seawater. In fresh water, the dissolved oxygen became 5.87 ppm and 8.27 ppm. That is, the increase in dissolved oxygen means that it is good as a survival condition of fish. The treated seawater is blown out from the discharge port 14 of the discharge pipe 13. The seawater is sucked from the suction port 22 of the outer peripheral pipe 20 by the negative pressure caused by the flushing, mixed with the air bubbles having been treated, and discharged from the discharge port 21.

The seawater treated by mixing the air is discharged to the bottom of the aquaculture tank 1 together with the air sucked from the air suction pipe 18 by a large amount of fine bubbles such as carbon dioxide gas separated and treated by the air. . For this reason, ammonia, nitrogen nitrate, carbon dioxide, chlorine, oxygen, and the like in the seawater are degassed in the gaseous state. At the same time, however, because it draws in a large amount of air, the amount of dissolved oxygen useful for fish farming increases and does not decrease.

Moreover, there is also an effect of slightly cooling the seawater which rose due to the mixing of air. By mixing this air with seawater, the gas harmful to the fish degassed in the fractionation-generation chamber 12 can be effectively released to the atmosphere. As a result, the pH value of the seawater became close to that of natural seawater, in particular due to the discharge of carbon dioxide gas.

In addition, organic matters such as impurities naturally contained in seawater or parasites destroyed by cavitation, parasite eggs, Escherichia coli, fish droppings, feed residues, and adhesives from fish skin are formed on the surface of the liquid together with bubbles. Floats on These various impurities adhere to bubbles, that is, act as a kind of floating beneficiation. Sea water has a property of generating bubbles called waves, when the waves are severe, such as a rocky field. Therefore, if this bubble is removed, various impurities in seawater can be separated and removed.

Bubbles blown out from the discharge port 21 of the outer circumferential tube 20 form foam on the sea surface together with impurities, and the foam is discharged from the drain pipe 4 to the outside of the culture tank 1. As a result, the seawater in the culture tank 1 is purified.

Embodiment 2

The said Embodiment 1 was embodiment which provided the aquaculture water purification apparatus in the aquaculture tank. 3 is a cross-sectional view of the raft when the cultured water purification device of the present invention is installed on the raft. 4 is a plan view of FIG. 3. Raft 30 is flat and substantially rectangular. The raft 30 is a structure in which several pipes 31 are connected by a pipe seam (not shown). On the surface of the outer circumference of the rectangular raft 30, a plurality of floats 32 made of foamed stylen are arranged and fixed inside to give buoyancy to the raft 30. .

In the center of the raft 30 is a reproduction section 33, which is a cylindrical section for the reproduction of farmed fish, is arranged in a fishing net so that fish do not escape to the outer periphery and the bottom. On the raft 30 is a machine box 34 is fixedly arranged for the installation in a horizontal plane shape. The machine box 34 is for covering the pump because the pump housed therein is indoor specification and weak to rain or splash of seawater.

Inside the machine box 34, a cultured water purification device 50 is disposed. The aquaculture water purifier 50 is a function of generating up and down convection of seawater in a region surrounded by fishing nets in the raft 30 and to increase the amount of dissolved oxygen in the seawater. The aquaculture water purifier 50 has a jetting nozzle 51 for injecting seawater, a fractionation generating 52 for forming a fractionation layer for stirring and mixing the injected seawater and air, and a pump unit 55 for pressurizing the seawater. And the like (see FIGS. 3 and 4). The pump unit 55 sucks fresh seawater from the outside of the fishing net and pressurizes it. This pressurized seawater is supplied to the injection nozzle 51 through the supply pipe 56. The pump unit 55 is a unit which consists of a pump which pressurizes seawater (0.1 MPa in this example), an electric motor which drives it.

That is, the pump unit 55 has a function of sucking seawater from the suction pipe 57 piped so as to be immersed in seawater, pressurizing it, and supplying it to the injection nozzle 51. The seawater discharged from the pump unit 55 is controlled within a range of discharge pressure and flow rate set by a control circuit (not shown). The air suction pipe 58 disposed on the upper portion of the jet box 52 is for drawing air from the air by the negative pressure of the seawater discharged from the injection nozzle 51. Therefore, oxygen is sucked in from the lower end of the air suction pipe 58 together with the seawater injected from the injection nozzle 51. The internal structure of the injection nozzle 51 and the jet generating 52 is the same as that of Embodiment 1 mentioned above, and the description is abbreviate | omitted.

One end of the discharge tube 63 extending to the bottom of the raft 30 is connected to the lower end of the sorting box 52. The discharge tube 63 has a horizontal portion 64 that extends downward in the vertical direction and extends in the horizontal direction. The distal end extending from the horizontal portion 64 is formed with a vertical discharge port 65 bent in an L shape. The discharge port 65 is disposed at the center position at the lower part of the cultured fish production portion 33 of the raft 30.

work

In the structure as described above, the seawater is classified in the same function as that of the first embodiment described above (52) and air, in particular, seawater containing oxygen in its components is discharged from the discharge port (65) via the discharge pipe (63). . The seawater that is mixed with air and treated with water is discharged to the bottom of the raft 30 together with the air sucked from the air intake 58 with a large amount of fine bubbles, such as carbon dioxide gas, which has been separated and treated with air. This increases the amount of dissolved oxygen available for fish farming. The bubbles blown out from the discharge port 65 form a foam on the sea surface together with impurities in the sea water, and the foam floats and diffuses on the sea surface, and finally decomposes by aerobic microorganisms, ultraviolet rays and the like.

In addition, since the seawater rises as the foam rises, the seawater in the raft 30 generates up and down convection. Since the outer circumference of the raft 30 is surrounded by fishing nets, the seawater in the raised raft 30 also causes up and down convection in the raft 30, but spreads to the outer circumference. For this reason, convection is generated by raising seawater containing organic matter with less oxygen from the seabed of the raft 30. As a result, oxygen is blown into the seawater in an oxygen-deficient state by the organic matter deposited on the seabed, thereby promoting the propagation of aerobic microorganisms on the seabed, and decomposing the organic matter into nitrogen, carbon dioxide, and the like.

Other classification occurrence room

The above-described sorting occurrences 9 and 52 are of a flat rectangular shape and are arranged so that their longitudinal directions are vertical. However, the classification occurrences 9 and 52 may have other shapes as long as the space partitioned into a flat rectangular shape is formed, as understood from the above-described functions.

5 illustrates a classification occurrence 70 of another embodiment. The box 71 of the sorting box 70 shown in FIG. 5 is formed in a cross shape. The injection nozzle 73 which draws in air from the air suction pipe | tube 72 and injects aquaculture water is arrange | positioned at the upper end center of the box 71. At the lower end center of the box 71, a discharge tube 74 for discharging a mixture of air and aquaculture water is disposed.

This sorting occurrence 70 is the 1st classification generating chamber 75, the 2nd classification generating chamber 76, and the 3rd classification generating chamber 77 which orthogonally cross at 90 degree intervals centering on the longitudinal direction. ) And four chambers of the fourth classification chamber (78). The classification generating chamber of Embodiment 1 described above in each pair of the first classification generating chamber 75 and the third classification generating chamber 77 and the second classification generating chamber 76 and the fourth classification generating chamber 78. It achieves the same function as (12) (refer FIG. 2).

The main classification selectively flows in any of the four directions by the Coanda effect, but the flow is unstable and is switched to the flow in one direction or several other directions at the same time. In other words, the main classification fluctuates into several streams. The shape and function of these classification generating chambers are basically the same as those of the above-mentioned classification generating chamber 12, and the description thereof is omitted.

6 illustrates a classification box 80 of another embodiment. The box 81 of the sorting box 80 shown in FIG. 6 is made into the cylindrical concave surface of the opposing side of a flat rectangle. The injection nozzle 83 which draws in air from the air suction pipe 82, and injects air and aquaculture water is arrange | positioned in the upper end center of the box 81. As shown in FIG.

A discharge tube 84 for discharging a mixture of air and aquaculture water is disposed at the lower center of the box 81. The sorting generating chamber 85 in this sorting box 80 is a space of a shape similar to an external appearance. The shape and function of the classification generating chamber 85 are substantially the same as those of the classification generating chamber 12 described above, and the description thereof is omitted.

7 illustrates a classification occurrence 90 of another embodiment. The box 91 of the sorting box 90 shown in FIG. 7 is made into the cylindrical convex surface of the opposing side of a flat rectangle. The injection nozzle 93 which draws in air from the air suction pipe 92, and injects air and aquaculture water is arrange | positioned in the upper end center of the box 91. At the lower end center of the box 91, a discharge tube 94 for discharging a mixture of air and aquaculture water is disposed. The classification generating chamber 95 in the classification generating box 90 is a space having a shape similar to the external appearance. Except for the shape of the convex surface of the classification generating chamber 95, the shape and function are substantially the same as those of the classification generating chamber 12 described above, and the description thereof is omitted.

8 illustrates a taxonomy 100 of another embodiment. The outer shape of the box 101 of the sorting box 100 shown in FIG. 8 is cylindrical. The injection nozzle 103 which draws in air from the air suction pipe 102, and injects air and aquaculture water is arrange | positioned at the upper end center of the box 101. As shown in FIG. In the lower center of the box 101, a discharge tube 104 for discharging a mixture of air and aquaculture water is disposed.

This sorting occurs 100 includes a first classification generating chamber 105, a second classification generating chamber 106, a third classification generating chamber 107, and an orthogonality at an angle interval of 45 degrees from the longitudinal center line thereof. 8 chambers of the 4th classification chamber 108, the 5th classification chamber 109, the 6th classification chamber 110, the 7th classification chamber 111, and the 8th classification chamber 112 consist of. The main classification flows in any of the eight directions or in several different directions at the same time by the Coanda effect, but because the flow is unstable, it is switched to the other.

In other words, the main classification is complicated and the flow is generated. The function of these classification generating chambers is substantially the same as that of the above-mentioned classification generating chamber 12, and the description is abbreviate | omitted. However, the shape of the classification occurrence differs from the above-described dimension ratio.

[Other Embodiments]

In the first embodiment and the second embodiment, air is sucked from the air suction pipe 18, but oxygen may be sucked. The oxygen concentrator for supplying oxygen extracts only oxygen from the air, and its structure and function are well known, and the description thereof is omitted. In addition, although the said Embodiment 1 and Embodiment 2 were aquaculture apparatuses of seawater, it is similarly applicable also to the pumping apparatus of freshwater fish by fresh water.

The cultured water referred to in the first and second embodiments is for artificially farming fish and shellfish, but may be activated by blowing air or oxygen to purify seawater, lakes and river water. Therefore, aquaculture water in the present invention does not mean only seawater and fresh water for artificially growing fish and shellfish.

As described in detail above, the method for purifying aquaculture water of the present invention and the apparatus can increase the dissolved oxygen amount of aquaculture water such as seawater and fresh water with a simple device. For this reason, the activity of aerobic microorganisms is active to purify the water quality, and also has an effect that can have a good effect on the culture of fish and shellfish.

Claims (10)

Pressurized aquaculture water for raising a living organism is sprayed with a nozzle in a substantially downward direction in the vertical direction, At the same time as the injection, at least a gas containing oxygen is sucked to form a jet for stirring and mixing the cultured water and the gas in a substantially partitioned space, The aquaculture water purifying method, characterized in that the agitated and mixed with the cultured water and the gas is discharged from the discharge port in the vertical direction of the space. The method of claim 1, wherein the classification is accompanied by a Coanda effect, which is a wall attachment phenomenon in which the cultured water is attached to the wall surface of the space. The cultured water purification method according to claim 1 or 2, wherein the cultured water is in a partitioned culture tank, and the foam generated on the liquid surface of the cultured water is discharged from the culture tank. The cultured water according to claim 1 or 2, wherein the cultured water is aquaculture water partitioned by a raft disposed at sea level or a lake surface, and the foam generated at the liquid level of the cultured water is discharged out of the area partitioned by the raft. Aquaculture water purification method. Nozzles (11, 51, 73, 83, 93, 103) for pressurizing the aquaculture water to spray substantially downward; Air supply pipes 18 and 58 disposed at the nozzles 11, 51, 73, 83, 93, and 103 for sucking air; Pressure pumps 15 and 55 for supplying the aquaculture water pressurized to the nozzles 11, 51, 73, 83, 93, 103, A fractionation generating chamber (21, 75 to 78, 85, 95, 105 to) having a space substantially partitioned by sucking the air at the same time as the jet and forming a fraction for stirring and mixing the aquaculture water and the air. 112), Aquaculture water purification comprising the discharge water 14 and 65 for discharging the aquaculture water and the agitated and mixed water from the dividing generation chambers 21, 75 to 78, 85, 95, 105 to 112. Way. 6. The cultured water purification according to claim 5, wherein the interior space (V) of the fractionation generating chambers (21, 75 to 78, 85, 95, 105 to 112) is flat in several three-dimensional box-shaped spaces. Way. 6. The internal space (V) of the classification generating chambers (21, 75 to 78, 85, 95, 105 to 112) is flat in a three-dimensional box-shaped space, and has a substantially horizontal thickness of the space. Let H be the width W and the length in the vertical (vertical) direction L When the effective diameter of the aperture (開口) of the nozzle (11) with D _1, D ₁ may form purification apparatus, characterized in that the relation <H, W / H> 4 , also H <L. The cultured water purification according to claim 6 or 7, wherein the air supply pipes (18, 58) are arranged coaxially with the nozzles (11, 51, 73, 83, 93, 103). Device. The method according to claim 8, wherein the gap is disposed so as to cover the outer periphery of the discharge pipe (13) in communication with the discharge port (14). An aquaculture water purifying apparatus, comprising an outer periphery pipe (20) for simultaneously discharging the agitated and mixed cultured water and the air from one end by suction. 10. The discharge tube (13) according to claim 9, wherein the discharge tube (13) has an L-shaped shape, one end of which is connected to the discharge port (14), and the other end has a discharge port (14) facing in the horizontal direction. Aquaculture water purification apparatus, characterized in that.