JP2020174569A - Fish culture apparatus - Google Patents

Abstract

To provide a culture apparatus capable of cultivating fish vigorously, by keeping culture water in an environment optimum for growth of fish over an extended period, while having an extremely simple structure.SOLUTION: A fish culture apparatus includes a culture pond 1 for fish storing culture water of sea water or plain water, and a photocatalytic purifier 2 for purifying culture water 9 in the culture pond 1. The purifier 2 is crushed and fired rhyolite 3 obtained by crushing and firing rhyolite, and containing fired titanium oxide, or fired and grooved rhyolite provided with a plurality of cutting grooves on the surface, and obtained by being fired, or both of them.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fish farming device, and more particularly to a fish farming device capable of breeding fish in a favorable growing environment by bringing the farmed water into contact with rhyolite.

Fish farming equipment using rhyolite has been developed. (See Patent Document 1)

Japanese Unexamined Patent Publication No. 7-256269

The aquaculture apparatus of Patent Document 1 is shown in FIG. This aquaculture device includes a septic tank 92 that treats the aquaculture waste liquid from the aquaculture pond 91 and separates it into solid and liquid, a circulation pump 93 that returns the treated water separated by solid and liquid in the septic tank 92 to the aquaculture pond 91, and a septic tank 92. It is provided with a sludge culture tank 94 for introducing the liquid-separated sludge and culturing the sludge. The sludge culture tank 94 is filled with an elution filler made of a microbial metabolite containing phenol and / or a compound having a phenol-exposing group, or a rotten plant. The sludge culture tank 94 preferably fills the filling section 95 with an elution filler made of rotten plants and the like and an elution filler made of crushed stone containing activated silicic acid such as andesite and rhyolite. .. The aquaculture water that has passed through the filling portion 95 that is filled with the rhyolite quarry is circulated to the septic tank 92.

Despite the extremely complicated overall structure of the fish farming device described above, since the flow pattern rock is used as a silicon component, the effect of purifying the culture water by the flow pattern rock cannot be sufficiently expected.

The present invention has been developed for the purpose of eliminating the above-mentioned drawbacks of the conventional fish farming apparatus, and one of the purposes of the present invention is to grow fish in aquaculture water for a long period of time while having an extremely simple structure. The purpose is to provide aquaculture equipment that can cultivate fish vigorously while maintaining it in the optimum environment.

The fish farming apparatus according to an aspect of the present invention includes a fish farming pond 1 that stores seawater or freshwater farming water, and a photocatalyst purifying material 2 that purifies the farming water 9 of the farming pond 1. The purifying material 2 is a calcined crushed rhyolite 3 containing titanium oxide in which rhyolite is crushed and calcined, or a calcined rhyolite 4 having a plurality of cutting grooves 7 provided on the surface. Either or both.

The fish farming device described above has an extremely simple structure, but realizes a feature that the fish can be cultivated vigorously by keeping the farming water in the optimum environment for fish growth for a long period of time.

It is a schematic block diagram of the fish farming apparatus which concerns on Embodiment 1 of this invention. It is a schematic block diagram of the fish farming apparatus which concerns on Embodiment 2 of this invention. It is a schematic block diagram of the fish farming apparatus which concerns on Embodiment 3 of this invention. It is a schematic block diagram of the fish farming apparatus which concerns on Embodiment 4 of this invention. It is a schematic block diagram of the fish farming apparatus which concerns on Embodiment 5 of this invention. It is a perspective view which shows another example of rhyolite with a calcined groove. It is an enlarged sectional view of the main part which shows the groove of rhyolite with a calcined groove. It is a schematic block diagram which shows the conventional aquaculture apparatus.

Hereinafter, the present invention will be described in detail with reference to the drawings. In the following description, terms indicating a specific direction or position (for example, "upper", "lower", and other terms including those terms) are used as necessary, but the use of these terms is used. This is for facilitating the understanding of the invention with reference to the drawings, and the meaning of these terms does not limit the technical scope of the present invention. Further, the parts having the same reference numerals appearing in a plurality of drawings indicate the same or equivalent parts or members.
Further, the embodiments shown below show specific examples of the technical idea of the present invention, and do not limit the present invention to the following. In addition, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, etc. of the components described below are not intended to limit the scope of the present invention to that alone, but are exemplified. It was intended. Further, the contents described in one embodiment and the embodiment can be applied to other embodiments and the embodiments. In addition, the size and positional relationship of the members shown in the drawings may be exaggerated in order to clarify the explanation.

The fish farming apparatus according to the first aspect of the present invention includes a fish farming pond that stores seawater or freshwater aquaculture water, and a photocatalyst purifying material that purifies the aquaculture water in the farming pond. The purifying material is either or both of a crushed and crushed titanium oxide-containing crushed slab, or a slab with a plurality of cutting grooves on the surface.

The above-mentioned culture equipment sterilizes the cultured water with the fired crushed flow pattern rock composed of the flow pattern rock containing titanium oxide that has been crushed and fired, and the flow pattern rock with a fire groove, so that the structure is extremely simple. It realizes the feature that fish can be cultivated vigorously by keeping the cultured water in the optimum environment for fish growth for a long period of time. Rhyolite containing titanium oxide is remarkably improved in bactericidal property when immersed in water by firing. In addition to the titanium oxide contained in the calcined Ryumoniwa sterilizing the cultured water by the action of a photocatalyst, it becomes porous and water absorption is improved, so that water can quickly permeate inside. This is because the microorganisms that live inside sterilize and purify the cultured water. The titanium oxide photocatalyst contained in the calcined Ryumoniwa does not oxidize or reduce itself, but it promotes a chemical reaction with ultraviolet rays emitted from ultraviolet irradiation lamps such as the sun and fluorescent lamps to sterilize cultured water. To do. Since the titanium oxide photocatalyst itself does not change, the effect is semi-permanent and realizes excellent bactericidal properties over a long period of time. The photocatalyst generates active oxygen and OH radicals from water and oxygen, and decomposes organic substances such as bacteria, viruses, stains, odors, molds, and harmful substances into carbon dioxide and water by oxidation and reduction reactions. The photocatalyst of titanium oxide contained in the calcined Ryumoniwa has a stronger oxidative decomposition action than ozone, which has stronger bactericidal activity than ozone and chlorine, and also generates harmful substances. Unlike ozone and chlorine, it does not remain and interfere with the growth environment of fish, and effectively sterilizes the cultured water while ensuring high safety, and keeps the fish in a comfortable state for a long period of time.

Further, in the flow pattern rock that has been fired to become porous, microorganisms inhabit in the region not irradiated with ultraviolet rays, and the microorganisms decompose and purify the organic substances contained in the cultured water and keep them in a clear state. When the fired crushed flow pattern rock is laid on the bottom of the culture pond, the fired crushed flow pattern rock in the upper layer is irradiated with ultraviolet rays. Therefore, the calcined crushed rhyolite in the upper layer sterilizes and purifies the cultured water by the photocatalytic action of titanium oxide. The surface of the calcined crushed rhyolite laid in the upper layer is irradiated with ultraviolet rays, and the photocatalytic action of the surface purifies the cultured water. Porous calcined crushed rhyolite has fine voids inside, but microorganisms live in the fine voids inside, and the microorganisms decompose organic matter to purify the cultured water and keep it in a clear state. To do. The surface of calcined crushed rhyolite with a large particle size is irradiated with ultraviolet rays to purify the cultured water by photocatalytic action, but the inside is not irradiated with ultraviolet rays, and microorganisms inhabit the fine voids inside. Microorganisms that live inside purify the aquaculture water that invades inside.

Further, the rhyolite is calcined to become porous and the water absorption is improved, and in addition, the rhyolite is harder than the uncalcined rhyolite and its physical durability is remarkably improved. The calcined rhyolite, which purifies the farmed water and keeps it clear, achieves excellent purification for a long period of time without washing, but in an environment where a large number of fish grow, it is regular. Achieve a better purification effect by cleaning. The calcined crushed rhyolite can be backwashed or stirred to remove foreign matter, but the calcined and hardened rhyolite can be prevented from being damaged in this step. Rhyolite that does not break even when agitated in the washing process has less turbidity in the cultured water in the washing process, and can prevent the rhyolite from being crushed and worn. The calcined crushed rhyolite that is not damaged in the washing process does not wear even after repeated washing and does not lose its shape, so that the cultured water can be smoothly permeated over a long period of time and can be efficiently purified.

The fish farming apparatus according to the second invention of the present invention uses innumerable calcined crushed rhyolite laid at the bottom of a fishpond as a purifying material.
In the above aquaculture equipment, innumerable fired crushed rhyolites are laid on the bottom of the pond, so the fired crushed rhyolites arranged over a wide area are efficiently irradiated with ultraviolet rays, and the culture water is acted on by the action of a photocatalyst. Can be sterilized.

The fish farming apparatus according to the third aspect of the present invention is used as a purifying material by filling innumerable calcined crushed rhyolite in a water-permeable bag.
Since the above-mentioned aquaculture device fills a water-permeable bag with calcined crushed rhyolite, a large number of calcined crushed rhyolite can be efficiently transported and laid, or can be easily and easily taken out for cleaning or replacement. it can.

The fish farming apparatus according to the fourth aspect of the present invention uses rhyolite with a fired groove fixed to the side surface of the fishpond as a purifying material.
In the above aquaculture apparatus, since the photocatalytic firing grooved rhyolite is also arranged on the side surface of the aquaculture pond, the aquaculture water can be purified more effectively.

The fish farming apparatus according to the fifth aspect of the present invention is provided with a filter for aquaculture water, which is connected to a culture pond via a circulation path and a circulation pump, and the filter is filled with fired crushed flow pattern rock. ing.
In the above-mentioned culture apparatus, since the filter filled with the fired crushed flow pattern is connected to the culture pond via the circulation path and the circulation pump, the culture water without arranging the fired crushed flow pattern in the culture pond. Can be circulated in a filter for efficient purification.

In the fish farming apparatus according to the sixth aspect of the present invention, the filter is provided with a filtration tank, and the filtration tank is filled with fired crushed rheumatism.
In the above aquaculture device, since the filtration tank of the filter is filled with calcined crushed rhyolite, a large number of calcined crushed rhyolite can be used while being easily and easily washed by backwashing, etc. It can be maintained in the optimum environment for fish growth over a period of time.

In the fish farming apparatus according to the seventh aspect of the present invention, the filter is a mesh filter net through which the aquaculture water passes and does not allow the fired crushed rhyolite to permeate, and a fired crushed flow laid on the filter net. It is equipped with a crest rock, and a circulation pump supplies the circulating aquaculture water to the upper surface of the fired crushed rhyolite.
In the above-mentioned aquaculture apparatus, since the calcined crushed rhyolite can be arranged by exposing it in the air, the calcined crushed rhyolite can be efficiently irradiated with ultraviolet rays and the cultured water can be efficiently purified by the effect of the photocatalyst.

In the fish farming apparatus according to the eighth aspect of the present invention, fired crushed rhyolite is laid at the bottom of the pond to a predetermined thickness, and the fired grooved rhyolite is fixed on the side surface.
The above-mentioned culture equipment irradiates both the calcined crushed rheumatism laid at the bottom of the culture pond and the calcined grooved rheumatism fixed to the side surface with ultraviolet rays, and more effectively acts as a photocatalyst to cultivate water. Can be sterilized.

In the fish farming apparatus according to the ninth aspect of the present invention, the calcined crushed rhyolite and the calcined grooved rhyolite are made into rhyolite fired at 600 ° C. or higher.
With the above-mentioned culture apparatus, it is possible to perform firing crushed flow pattern rock and flow pattern rock with a firing groove into a porous shape, improve the water absorption characteristics by the continuous fine voids formed inside, and realize an ideal purification material.

In the fish farming apparatus according to the tenth invention of the present invention, the fishpond is arranged in an ultraviolet irradiation environment.
By arranging the culture pond in an ultraviolet irradiation environment, the above culture equipment effectively irradiates the calcined crushed rheumatism and the calcined grooved rheumatism placed in the culture pond with ultraviolet rays, and contains titanium oxide. Cultured water can be efficiently sterilized by the action of the photocatalyst.

The fish farming apparatus according to the eleventh invention of the present invention includes an ultraviolet irradiation lamp that irradiates the fired crushed rhyolite or the fired grooved rhyolite with ultraviolet rays.
In the above-mentioned aquaculture apparatus, the fired crushed rhyolite or the fired grooved rhyolite is irradiated with ultraviolet rays from an ultraviolet lamp, and the cultured water can be efficiently sterilized by the action of the photocatalyst of titanium oxide contained therein. Since the aquaculture device having this structure irradiates ultraviolet rays from an ultraviolet lamp, for example, in a structure in which fired crushed rhyolite or fired grooved rhyolite is placed in the culture pond, the upper part of the culture pond can be closed. In the structure in which the inside of the filtration tank is filled with fired crushed rhyolite and the cultured water is circulated, the cultured water can be sterilized by the photocatalyst of the fired crushed rhyolite installed indoors without a fluorescent lamp.

(Embodiment)
The fish farming apparatus shown in the schematic views of FIGS. 1 to 5 is bactericidal or antibacterial, which is immersed in a fish farm 1 storing seawater or freshwater farm water 9 and a fish farm 9 in the farm 1. The purifying material 2 is provided. The purifying material 2 is a calcined crushed rhyolite 3 that crushes and calcins rhyolite, or a calcined rhyolite 4 having a plurality of cutting grooves 7 on the surface.

The calcination crushed rhyolite 3 can be produced by crushing the rhyolite and then firing it, or by crushing the fired product, but preferably, it is fired after being crushed. Firing crushing The rhyolite 3 is crushed into granules having an average particle size of 1 mm to 5 cm and fired. The calcined crushed rhyolite 3 is adjusted to the optimum particle size in the state of use. As shown in FIGS. 1, 2 and 5, the calcined crushed rhyolite 3 laid on the bottom of the cultured water 9 has an average particle size preferably as large as 1 cm to 5 cm, and the cultured water 9 is laid. Provide a gap that is easy to pass through. As shown in FIG. 3, the calcined crushed rhyolite 3 filled in the filter 5 forcibly circulating the aquaculture water 9 has an average particle size of 1 mm to 5 mm and a large contact area with the aquaculture water 9 passing through. To do. As shown in FIG. 4, the aquaculture apparatus laid on the filtration net 6 and sprinkling the aquaculture water 9 from above smoothly passes through the aquaculture water 9 sprinkled with the average particle size of the calcined crushed rhyolite 3. In order to increase the contact area, the average particle size is preferably 5 mm to 3 cm.

The calcination crushed rhyolite 3 can be fired efficiently by shortening the firing time and heating the inside by firing the rough rhyolite in a crushed state. If the firing temperature is too low, it is not possible to achieve preferable water absorption as a porous material to the inside, and the hardness is low and it is easily damaged. It cannot be made porous by firing at high temperature. Since rhyolite melts at 700 ° C. to 900 ° C., the firing temperature is, for example, 600 ° C. or higher and 900 ° C. or lower, preferably 800 ° C. to 900 ° C. In the firing, the crushed rhyolite is supplied to the rotating trommel arranged on the downward slope, and the rhyolite can be transferred while being agitated by the trommel for efficient and uniform firing. Since the calcination rock calcined at the above temperature contains several% of potassium oxide having a low melting point, the potassium oxide having a low melting point is melted in the calcining step and further heated to a high temperature to thermally expand the internal gas. It is forcibly discharged to become porous, and the molten potassium oxide having a low melting point or the like becomes a molten material and is hardly sintered. Since the fired rhyolite is forcibly discharged of the gas that has been thermally expanded inside and becomes porous, the fine voids formed inside in the porous state become continuous with each other and have water absorption characteristics. improves. By the way, when water droplets adhere to the surface of unfired rhyolite, the water adheres as water droplets without being absorbed inside due to surface tension, but when water adheres to the surface, the fired rhyolite adheres to the surface. It quickly penetrates and is absorbed inside without adhering in the form of water droplets.

The rhyolite 4 with a firing groove is provided by cutting a large number of grooves and then firing, or after firing, a large number of grooves are cut and provided on the surface. However, it is preferable to cut and provide the grooves. After providing, it is fired. This is because it is difficult to cut efficiently when it is fired and hardened. In the rhyolite 4 with a calcined groove, the surface of the rough rhyolite is cut with a saw to provide a groove. As shown in the perspective view of FIG. 6 and the enlarged cross-sectional view of FIG. 7, the width (W) of the groove 7 is set to 2 mm to 3 cm so that the aquaculture water 9 can freely pass through and ultraviolet rays can penetrate. The groove 7 has a wide width (W) to allow ultraviolet rays to penetrate deeper, but since a large number of grooves 7 having a wide width (W) cannot be provided, the above range is preferable for the application. Adjust to a wide width. The distance (L) between the grooves 7 arranged adjacent to each other is adjusted in consideration of the strength of the surface, but is preferably 1 cm to 5 cm. The surface area can be increased by narrowing the interval (L) and arranging a large number of grooves 7, but if it is too narrow, the strength decreases, so the determination is made in consideration of the strength and the required surface area. Further, the depth (D) of the groove 7 can be made deeper to increase the surface area, but if it is too deep, the strength is lowered, so the depth (D) is preferably 1 cm to 30 cm, more preferably 5 cm to 10 cm.

The fired grooved rhyolite 4 shown in the cross-sectional perspective view of FIG. 5 has a plurality of rows of grooves 7 arranged in a parallel posture, and the fired grooved rhyolite 4 shown in the perspective view of FIG. 6 has a grid pattern. A groove 7 is provided. The fired grooved rhyolite 4 shown in FIGS. 5 and 6 is entirely processed into a plate shape to provide a groove 7 on the surface. The rhyolite 4 with a calcined groove can be provided with a groove 7 having the same depth to increase the surface area, and can be easily installed on the side surface or the bottom surface of the cultured water 9. However, the rhyolite 4 with a calcined groove does not necessarily have to be processed into a plate shape as a whole, and a plurality of grooves 7 may be provided on the surface.

The groove 7 of the rhyolite 4 with a calcined groove can be provided by cutting with a circular saw. The surface area of the groove 7 can be increased by cutting the facing inner surfaces with a circular saw so as to have irregularities. The circular saw provided with the groove 7 by cutting can adjust the unevenness of the facing inner surfaces by the shape of the cutting edge. With this circular saw, the facing surface of the groove 7 can be cut linearly to have large irregularities, and the circular saw can be cut into a planar shape to have small irregularities.

The groove 7 can be provided by fixing the rhyolite and moving the saw in a straight line, or by fixing the saw and moving the rhyolite in a straight line. As shown in FIG. 5, the plurality of rows of parallel grooves 7 can be provided by repeatedly moving a saw and rhyolite at a predetermined pitch in a straight line. As shown in FIG. 6, the go board lattice-shaped groove 7 repeatedly moves the saw and the rhyolite at a predetermined pitch in a straight line, moves the saw and the rhyolite at a relatively right angle, and then further. The saw and rhyolite can be repeatedly and linearly moved at a predetermined pitch.

As shown in FIG. 5, the fired grooved rhyolite 4 provided with the parallel grooves 7 has a surface strength higher than that of the fired grooved rhyolite 4 provided with the grid-like grooves 7 of FIG. You can be strong. The fired grooved rhyolite 4 of the parallel groove 7 is installed in the aquaculture pond 1 in consideration of the direction of the incident ultraviolet rays, and the ultraviolet rays are efficiently incident into the groove 7. In the aquaculture apparatus of FIG. 5, the parallel grooves 7 are arranged in a posture extending in the vertical direction, and the ultraviolet rays incident from above are efficiently guided into the grooves 7 to enhance the effect of the photocatalyst. As shown in FIG. 6, the fired grooved rhyolite 4 having grooves 7 in a grid pattern can have a large surface area, and the inner surface of the grooves 7 is efficiently irradiated with ultraviolet rays regardless of the direction of incident ultraviolet rays. Therefore, the effect of the photocatalyst can be enhanced.

The fired crushed rhyolite 3 and the fired grooved rhyolite 4 are provided in the culture pond 1 in the state shown in FIGS. 1 to 5 to purify the culture water 9. In the aquaculture apparatus of FIG. 1, the photocatalytic purifying material 2 is a fired crushed rhyolite 3 containing titanium oxide obtained by crushing and firing rhyolite, and the fired crushed rhyolite 3 is placed at the bottom of the culture pond 1. It is laid to a predetermined thickness. The aquaculture apparatus of FIG. 2 is filled with a plurality of calcined crushed rhyolites 3 in a water-permeable bag 8 and laid on the bottom of the aquaculture water 9. Further, the aquaculture apparatus of FIGS. 1 to 5 is aerated with air to agitate the aquaculture water 9 and replenish oxygen. For air aeration, an aeration device 10 having innumerable fine injection holes is arranged, and pressurized air is supplied to the aeration device 10 from an air pump 11. The pressurized air supplied from the air pump 11 to the aeration device 10 becomes fine bubbles and floats the aquaculture water 9, and circulates and agitates the aquaculture water 9 while supplying oxygen.

In the aquaculture equipment of FIGS. 1 and 2, the average particle size of the calcined crushed rhyolite 3 laid at the bottom of the aquaculture pond 1 is preferably 1 cm to 5 cm. The calcined crushed rhyolite 3 having this particle size can be efficiently purified by passing the cultured water 9 that is agitated by air aeration through the gap formed between the calcined crushed rhyolite 3. However, the average particle size of the calcined crushed Ryumoniwa 3 can be made smaller or larger than the above range to purify the cultured water 9. The small calcined crushed rhyolite 3 has a large surface area and can efficiently purify the surface by the action of a photocatalyst, and the large calcined crushed rhyolite 3 is placed between the calcined crushed rhyolite 3 in a laid state. Since a large void is formed, the culture water 9 can be smoothly passed through this gap to efficiently purify the whole.

Since the aquaculture equipment of FIGS. 1 and 2 is open above the aquaculture pond 1, when it is installed outdoors, the ultraviolet rays of the sun's rays irradiate the fired crushed rheme rock 3 and it is installed indoors. The ultraviolet rays of the fluorescent lamp in the room are irradiated, and the aquaculture water 9 is sterilized by the action of the photocatalyst. In the aquaculture apparatus of FIG. 2, by using a bag material having translucency as the bag 8 for filling the fired crushed rhyolite 3, the filled fired crushed rhyolite 3 is also irradiated with ultraviolet rays. The cultured water 9 can be sterilized by the action of the photocatalyst. The aquaculture device of FIG. 1 can be washed by stirring the calcined crushed rhyolite 3 at the bottom, and the aquaculture device of FIG. 2 can be washed with the calcined crushed rhyolite 3 in the bag 8.

In the aquaculture equipment of FIGS. 1 and 2, the opening surface of the aquaculture pond 1 is 1 m × 2 m, the water depth is 30 cm, the average particle size of the calcined crushed rhyolite 3 laid at the bottom is 1 cm, and the body length is 5 cm. About 30 fish of 20 cm or 20 cm were put in, and the fish were exchanged in several days to several tens of days, and the fish could be bred vigorously for two years without exchanging the cultured water 9.

As the calcined crushed rhyolite 3, those having the following components were used in the fluorescent X-ray analysis and EZ scan.
Silicon dioxide (SiO ₂ ) ………… 70.9%
Aluminum oxide (Al ₂ O ₃ ) ... 16.6%
Sodium oxide (Na ₂ O) ………… 3.7%
Potassium oxide (K ₂ O) ……………… 2.8%
Ferric trioxide (Fe ₂ O ₃ ) ………… 2.2%
Calcium oxide (CaO) ………… 3.0%
Magnesium oxide (MgO) ………… 0.2%
Titanium oxide (TiO ₂ ) ……………… 0.2%

In the aquaculture apparatus of FIG. 3, the filtration tank 12 of the filter 5 is filled with the calcined crushed rhyolite 3 which is the photocatalytic purification material 2. The filtration tank 12 is connected to the aquaculture pond 1 via a circulation pump 13 to circulate the aquaculture water 9 of the aquaculture pond 1. Further, the filtration tank 12 arranges an ultraviolet lamp 14 that irradiates the fired crushed rhyolite 3 of the photocatalyst with ultraviolet rays. The ultraviolet lamp 14 has a waterproof structure and is built in the filtration tank 12 to irradiate the fired crushed flow pattern rock 3 with ultraviolet rays. The filtration tank 12 is provided with a net material 15 at the bottom and the top, which does not allow the calcined crushed rhyolite 3 to pass through but allows the aquaculture water 9 to pass through. The calcined crushed rhyolite 3 is filled between the upper and lower net materials 15. The circulation pump 13 supplies the aquaculture water 9 to the upper part of the filtration tank 12, and circulates the aquaculture water 9 that has passed through the filtration tank 12 to the aquaculture pond 1 for circulation. The filtration tank 12 allows water to pass from the bottom to the top to backwash the fired crushed Ryumoniwa 3. In the backwash, the backwash water 16 is supplied to the filtration tank 12 to stir the calcination crushed rhyolite 3, and the foreign matter adhering to the calcination crushed rhyolite 3 is drained from above the filtration tank 12. In the backwashing step, the aquaculture water 9 in the aquaculture pond 1 is not circulated in the filtration tank 12. Since the aquaculture apparatus having this structure irradiates the fired crushed rhyolite 3 with ultraviolet rays inside the filtration tank 12, the upper part of the aquaculture pond 1 can be closed, and the aquaculture apparatus is installed indoors without a fluorescent lamp and fired. Cultured water 9 can be purified with the photocatalyst of crushed rhyolite 3.

The aquaculture apparatus of FIG. 3 uses fired crushed rheumatism 3 having the same composition as the apparatus shown in FIGS. 1 and 2, the opening surface of the aquaculture pond 1 is 1 m × 2 m, the water depth is 30 cm, and the filtration tank 12 is used. Approximately 50 kg of calcined crushed Ryumoniwa 3 having an average particle size of 3 mm is put in, and aquaculture water 9 is circulated by a 400 W circulation pump 13, and about 30 fish with a body length of 5 cm to 20 cm are put in the aquaculture pond 1. The fish were exchanged in a few days to a few tens of days, and the fish could be bred vigorously for two years without exchanging the aquaculture water 9.

In the aquaculture apparatus of FIG. 4, a filter 5 for purifying the aquaculture water 9 is laid on a mesh filter net 6 through which the aquaculture water 9 passes and the fired crushed rhyolite 3 does not permeate, and a filter net 6. It is composed of the fired crushed rhyolite 3 and the aquaculture water 9 circulated by the circulation pump 13 is supplied to the upper surface of the fired crushed rhyolite 3. In this aquaculture device, the aquaculture water 9 is sprinkled on the fired crushed rhyolite 3 laid on the filtration net 6, and the aquaculture water 9 that has passed through the fired crushed rhyolite 3 is circulated to the fishpond 1. To do. To sprinkle the cultured water 9, sprinkling pipes 17 having a large number of sprinkling holes are arranged in a plurality of rows on the filtration net 6, and the cultured water 9 is supplied to the sprinkling pipes 17 to obtain the fired crushed rheumatism 3. Sprinkle water on top. Since this device arranges the calcined crushed rhyolite 3 exposed in the air, the calcined crushed rhyolite 3 can be efficiently irradiated with ultraviolet rays and the cultured water 9 can be efficiently purified by the effect of the photocatalyst. The filtration net 6 is installed outdoors to irradiate ultraviolet rays of sunlight, or is installed indoors to irradiate ultraviolet rays with a fluorescent lamp. This device can stir and wash the calcination crushed rhyolite 3 on the filtration net 6 in a state of sprinkling water on the calcination crushed rhyolite 3.

The above-mentioned aquaculture apparatus uses fire-crushed crushed rocks 3 having the same composition as the apparatus shown in FIGS. 1 and 2, the opening surface of the aquaculture pond 1 is 1 m × 2 m, the water depth is 30 cm, and the filtration net 6 is long. Approximately 20 kg of calcined crushed ryumoniwa 3 with an average particle size of 1 cm is laid on it with a width of 1 m and a width of 50 cm. About 30 fish with a body length of 5 cm to 20 cm were put in 1 and the fish were exchanged in a few days to several tens of days, and the fish could be bred vigorously for 2 years without exchanging the aquaculture water 9. ..

In the aquaculture apparatus of FIG. 5, calcined crushed rhyolite 3 is laid at the bottom of the pond 1 to a predetermined thickness, and the calcined grooved rhyolite 4 is fixed to the side surface. This aquaculture device has a feature that the aquaculture water 9 can be purified more effectively because the photocatalytic firing grooved rhyolite 4 is also arranged on the side surface of the aquaculture pond 1. The fired grooved rhyolite 4 arranged on the side surface of the fishpond 1 is in a posture in which the groove 7 extends in the vertical direction, and the cultured water 9 is efficiently used by the photocatalytic fired grooved rhyolite 4 by the ultraviolet rays irradiated from above. Can be purified. Although not shown, it is also possible to fix the rhyolite 4 having a grid-like firing groove on the side surface of the pond 1 to purify the aquaculture water 9 more effectively.

In the above fish farming device, the fired crushed flow pattern rock 4 having the same composition as the fired crushed flow pattern rock 3 of the devices shown in FIGS. 1 and 2 is fixed to all four sides of the fishpond 1. A square fishpond 1 with an opening surface of 1 m x 2 m and a water depth of 30 cm is installed outdoors without laying a fired crushed flow pattern rock 3 on the bottom, and the fishpond 1 has a body length of 5 cm to 20 cm. About 30 fish were put in and the fish were exchanged in a few days to several tens of days, and the fish could be bred vigorously for two years without exchanging the aquaculture water 9. However, the thickness of the rhyolite 4 with a calcined groove is 10 cm, a parallel groove 7 is provided on the surface, the width (W) of the groove 7 is 1 cm, the interval (L) of the groove 7 is 2 cm, and the groove is formed. The depth (D) of 7 was set to 10 cm.

The culturing device of the present invention can be suitably used for cultivating various fish as a culturing device capable of holding the cultivated water stored in the cultivated pond provided outdoors or indoors in an optimum environment for fish growth for a long period of time.

1 ... Culture pond 2 ... Purifying material 3 ... Calcined crushed sludge 4 ... Filtration grooved sludge 5 ... Filter 6 ... Filter net 7 ... Groove 8 ... Bag 9 ... Culture water 10 ... Aerator 11 ... Air pump 12 ... Filtration tank 13 ... Circulation pump 14 ... Ultraviolet lamp 15 ... Net material 16 ... Backwash water 17 ... Sprinkling pipe 91 ... Aquaculture pond 92 ... Septic tank 93 ... Circulation pump 94 ... Sludge culture tank 95 ... Filling section

Claims (11)

Fish farming ponds that store seawater or freshwater aquaculture water,
It is equipped with a photocatalytic purifying material that purifies the aquaculture water in the pond.
The purifying material
Either or both of the fired crushed flow pattern rock containing titanium oxide that has been crushed and fired, or the fired fired grooved flow pattern rock having multiple cutting grooves on the surface. A fish farming device characterized by. The fish farming device according to claim 1.
The purifying material
A fish farming device characterized by innumerable calcined crushed rhyolite laid on the bottom of the fishpond. The fish farming device according to claim 2.
A fish farming apparatus characterized in that the purifying material is filled in a water-permeable bag with a myriad of calcined crushed rhyolites. The fish farming device according to any one of claims 1 to 3.
A fish farming apparatus, wherein the purifying material is a flow pattern rock with a fired groove fixed to a side surface of the farming pond. The fish farming device according to claim 1.
The aquaculture pond is equipped with a filter for aquaculture water which is connected to the aquaculture pond via a circulation pump.
A fish farming apparatus characterized in that the filter is filled with the calcined crushed rhyolite. The fish farming device according to claim 5.
A fish farming apparatus, wherein the filter includes a filtration tank, and the filtration tank is filled with the calcined crushed rhyolite. The fish farming device according to claim 5.
The filter
A mesh filtration net through which aquaculture water passes and does not allow calcined crushed rhyolite to permeate.
It is equipped with a fired crushed flow pattern rock laid on the filter net.
A fish farming apparatus, wherein the circulation pump supplies circulating aquaculture water to the upper surface of the calcined crushed flow pattern rock. The fish farming device according to claim 1.
A fish farming apparatus characterized in that calcined crushed rhyolite is laid at the bottom of the pond to a predetermined thickness, and the calcined grooved rhyolite is fixed to the side surface. The fish farming device according to any one of claims 1 to 8.
A fish farming apparatus, wherein the calcined crushed rhyolite and the calcined grooved rhyolite are rhyolites calcined at 600 ° C. or higher. The fish farming apparatus according to any one of claims 1 to 9.
A fish farming apparatus characterized in that the fishpond is arranged in an ultraviolet irradiation environment. The fish farming device according to any one of claims 1 to 9.
A fish farming apparatus comprising an ultraviolet irradiation lamp for irradiating the fired crushed rhyolite or the fired grooved rhyolite with ultraviolet rays.

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