JPH06181659A - Rotating aeration type organism filter - Google Patents

Abstract

PURPOSE:To obtain a rotating aeration type filter, capable of efficiently feeding dissolved oxygen required for the growth of fishes and simultaneously removing ammonia toxic to the fishes in high-density culture of the fishes. CONSTITUTION:This rotating aeration type filter is capable of feeding dissolved oxygen into rearing water in a water tank for rearing fishes and equipped with water wheels 2-1 and 2-2 partially immersed in the rearing water and rotated so as to mix oxygen in the rearing water and a drum type filter tank 4 connected to the water wheel and filled with a filter medium in which aerobic bacteria breed in a rotating drum, partially immersed in the rearing water and rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary aeration type biological filtration device, which is suitable for efficiently supplying dissolved oxygen necessary for growing fish into breeding water and simultaneously removing ammonia which is toxic to fish. The present invention relates to a rotary aeration type biological filtration device.

[0002]

In order for fish to breathe, it is necessary for a range of dissolved oxygen to be present. When oxygen in the water is insufficient, the fish develops a nose-lifting phenomenon (an action of turning the head to the surface of the water, opening and closing the mouth openly, and trying to supply oxygen to the gills), and in severe cases, causes oxygen deficiency. Generally, when cultivating fish on land, due to reasons such as limited breeding space and difficulty in securing water, a circulating filtration type aquaculture system in which a filtering device is installed in a pipe system that circulates water in an aquarium for raising fish is practiced. . In this filtration device, biological filtration is performed in which ammonia excreted by fish is efficiently oxidatively decomposed and detoxified by the action of aerobic bacteria. Therefore, in the fish breeding system, oxygen needs to be supplied not only to the breeding fish but also to the bacteria growing in the filtration device.

In the aquaculture with a high breeding density of fish, which is the object of the present invention, the fish to be raised and other fish are raised.
A large amount of oxygen is consumed due to respiration of phytoplankton, aerobic oxidation of organic matter such as residual food and excreted fish, and oxidation of products such as anaerobic decomposition products of organic matter deposited on the bottom of the rearing tank. Therefore, it is necessary to mechanically mix oxygen. As means for supplying oxygen into the water, there are a water wheel, a blower diffuser type, an underwater aerator type, a vertical pump type and the like. The outline will be described with reference to FIG.
FIG. 6 is an explanatory view showing an oxygen supply means in a conventional fish breeding aquarium.

FIG. 6A shows oxygen supply by the water wheel W. That is, the surface of the water is aerated and water droplets are blown into the air to dissolve oxygen, and the surface of the water is undulated to increase the contact area between water and air to dissolve oxygen. FIG. 6B shows a blower diffuser type, in which a large amount of air is sent into water and blown out as fine bubbles by the diffuser tube B. FIG. 6C shows an underwater aerator system, in which air is ejected from an ejection port E in water, and air and water are mixed and ejected. FIG. 6D shows a vertical pump type in which a large amount of water is dropped as a water flow from the discharge port D at the upper part of the vertical pump V to mix air on the water surface. In an actual aquaculture production site having a breeding aquarium, a water turbine is generally used frequently.

[0005]

The necessity of supplying oxygen to the breeding water has been described above. On the other hand, ammonia, which is harmful to fish, is generated by the action of aerobic bacteria attached to the surface of the filter material in the filtration device. , Is detoxified by oxidizing ammonia to nitrous acid and then nitric acid. In this way, in the actual aquaculture site, in addition to breeding equipment, aeration equipment and filtration equipment are installed in order to supply oxygen and remove ammonia necessary for high-density aquaculture of fish. Labor costs are required to maintain and manage the farm, and aquaculture that relies on experience has been carried out. Therefore, in order to raise fish efficiently and with high density, it is important to maintain water quality well and to save labor and energy.

The present invention has been made to solve the above-mentioned problems of the prior art, and in high-density aquaculture of fish,
It is an object of the present invention to provide a rotary aeration type biological filtration device capable of efficiently supplying dissolved oxygen required for fish growth and simultaneously removing toxic ammonia for fish.

[0007]

In order to achieve the above object, the most basic constitution of the first invention relating to the rotary aeration type biological filtration device of the present invention is to dissolve in breeding water of an aquarium for breeding fish. A biological filtration device that supplies oxygen, and a water wheel partly immersed in the breeding water so as to mix oxygen in the breeding water and rotating, and connected to this water wheel, inside the rotating drum,
It is provided with a drum-shaped filtration tank which is filled with a filter material in which aerobic bacteria have propagated and a part of which is immersed in breeding water and rotated.

In order to achieve the above-mentioned object, the concrete configuration of the second invention relating to the rotary aeration type biological filtration device of the present invention is an organism for supplying dissolved oxygen to the breeding water of an aquarium for breeding fish. A filtering device, a motor that generates a rotational force, a water turbine that is connected to the motor and that is partially rotated in the breeding water so as to mix oxygen in the breeding water, and a transmission that is connected to the turbine. , Connected to this transmission, the rotary drum is filled with a filter material in which aerobic bacteria have propagated, and a part of it is immersed in breeding water to rotate, and a drum-shaped filter tank and the rotary shafts of these rotary systems are supported. Bearing, the motor, the transmission, the float on which the bearing is mounted and which floats on the water surface, and a member which connects the plurality of floats.

Further, in order to achieve the above-mentioned object, the concrete constitution of the third invention relating to the rotary aeration type biological filtration device of the present invention is an organism for supplying dissolved oxygen to the breeding water of the aquarium for breeding fish. A filtering device, a motor that generates a rotational force, a transmission that is connected to this motor, and a transmission that is connected to this transmission, fills a rotary drum with a filter material in which aerobic bacteria have propagated, and raises part of it. A drum-shaped filtration tank that is immersed in water and rotated, a biological filtration device including a blade of a water turbine attached to the outer periphery of the filtration tank, a bearing that supports the rotating shafts of these rotating systems, the motor, and a transmission, It is composed of a float on which a bearing is placed and which floats on the water surface, and a member which connects the plurality of floats.

[0010]

According to the above technical means, since oxygen can be supplied to the breeding water by rotary aeration with a water wheel, an oxygen supply device to the biological filtration tank is not particularly required, and aeration equipment is not required. Further, the power of the water turbine can be used to efficiently bring the breeding water into contact with the filter material in which the aerobic bacteria have been filled in the rotary drum (filter tank), and thus an excessive filtration facility is not required.

[0011]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing the structure of a rotary aeration type biological filtration device according to an embodiment of the present invention, FIG. 2 is a partially cutaway side view showing the essential parts of the device of FIG. 1, and FIG. It is a block diagram which shows the other Example of a biological filtration tank, (a) is a front view, (b) is a side view, FIG. 4 shows the filtration tank which equips the outer periphery of a drum type biological filtration tank with the blade | wing of a water turbine. In the configuration diagram,
(A) is a front view, (b) is a side view, and FIG. 5 is a perspective view showing a configuration of a rotary aeration type biological filtration device according to another embodiment of the present invention.

The rotary aeration type biological filtration device shown in FIG. 1 has a construction in which a water wheel for supplying oxygen and a drum type biological filtration tank are separated. In FIG. 1, 1 is a motor that generates rotational force, 2-1 is a first water turbine that is connected to the motor 1 through a shaft 6, and 3-1 is a water wheel that is connected to the water wheel 2-1 and functions as a speed reducer. Gear box 4, 4 is a drum type biological filtration tank connected to the gear box 3-1, 3-2 is a gear box connected to the drum type biological filtration tank 4 and functions as a gearbox, 2-2 is a gear Second connected to box 3-2
Water turbine, 7 is a bearing that supports the shaft 6 of the rotating system, 5-1 is a float on which the motor 1 is mounted, 5-2
Is a float on which the gear box 3-1 is mounted, 5-3
Is a float for mounting the gear box 3-2, 5-4
Is a float for mounting the bearing 7, 8-1, 8-2, 8-
Reference numeral 3 is a bridge related to a member connecting the floats.

In the water wheels 2-1 and 2-2, a part of the blades is immersed in the breeding water and rotated to mix oxygen in the breeding water. Further, as shown in FIG. 2, the drum-shaped biological filtration tank 4 is one in which a rotary drum is filled with a filter material 9 in which aerobic bacteria have propagated, and a part of the rotary drum is immersed in breeding water and rotated. . As shown in FIG. 2, the drum-shaped biological filtration tank 4 has a mesh-like enclosure 4A made of plastic in order to efficiently bring the breeding water and the filter material 9 into contact with the outer periphery thereof.
Is equipped with.

FIG. 2 shows a gear box 3 (3-1, 3-2).
2), the water turbine 2 (general term for 2-1 and 2-2) and the drum type biological filtration tank 4, and means for transmitting rotational power. That is, for example, the rotation speed of the water turbine 2 is set to 10
0 rpm and the ratio of pinion 3a and gear 3b is 1:10
If so, the rotation speed of the drum type biological filtration tank 4 is 10 rpm.
Becomes Here, the rotation of the drum type biological filtration tank 4 is controlled by the water turbine 2.
The slower time is for more efficiently contacting the filter material 9 in which the aerobic bacteria have propagated with the breeding water. The number of rotations and the rotation ratio of the water turbine 2 and the drum type biological filtration tank 4 can be changed by changing the specifications of the motor and the gear ratio depending on the type of the filter material 9 filled in the drum type biological filtration tank 4.

As described above, the apparatus shown in FIGS. 1 and 2 floats on the surface of the breeding water, and each float 5 (5-1, 5-2,
5-3, 5-4), a motor 1, a gear box 3, and a bearing 7, and bridges 8 (8-1, 8-1,
8-2 and 8-3) are connected. When the breeding area is large, for example, the land surface and this device can be tied and fixed with a rope (not shown) for easy maintenance. Further, in order to improve the maintenance, the shaft 6, the water turbine 2, and the drum-shaped biological filtration tank 4 are flange-connected and removable.

According to the embodiment shown in FIGS. 1 and 2, oxygen can be supplied to the breeding water by rotational aeration by the water wheels 2-1 and 2-2 accompanying the rotation of the motor 1, so that no special oxygen supply device is required. , Does not need aeration equipment. Further, by utilizing the power of the water turbine, the drum-shaped biological filtration tank 4 can be rotated through the transmissions of the gear boxes 3-1 and 3-2.
By filling the rotary drum (filter tank) with the filter material 9 in which aerobic bacteria have propagated, it is possible to make efficient contact with water, so that no excessive filtration equipment is required.

Next, another embodiment of the drum type biological filtration tank will be described with reference to FIG. The drum-shaped biological filtration tank shown in FIG. 3 is provided with a number of slits 10 on its outer circumference for improving the contact between the breeding water and the filter material 9 in the axial direction, and each slit 10 keeps an inclination to promote the inflow of the breeding water. It has the enclosure 4B. In addition, on both sides of the rotary drum, there is provided an inlet / outlet opening 4a equipped with an openable / closable lid for putting in / out the filter material 9.

Next, still another embodiment of the drum type biological filtration tank will be described with reference to FIG. A drum type biological filtration tank 4'shown in FIG. 4 has blades 2A of a water turbine attached to the outer periphery thereof, and has a configuration in which the water turbine and the drum type biological filtration tank are integrated. As shown in FIG. 4, the rotary aeration type biological filtration device shown in FIG. 5 has a structure in which a water wheel for supplying oxygen and a drum type biological filtration tank are integrated. Figure 5
In FIG. 4, the same reference numerals as those in FIGS. 1 and 4 denote the same parts, and thus the description thereof will be omitted.

In the apparatus shown in FIG. 5, on the float 5A,
The motor 1 and a gear box 3 (here, functioning as a speed reducer) connected to the motor 1 are placed, and on the float 5B,
A bearing 7 that supports the shaft 6 of the rotary system is placed, and the floats 5A and 5B are connected by a bridge 8. Thus, the drum-shaped biological filtration tank 4 ′ equipped with the blades 2A of the water turbine, which is connected to the gear box 3 via the shaft 6, is held so that a part thereof is immersed in the breeding water. According to the embodiment shown in FIG. 5, substantially the same effect as that of the embodiments shown in FIGS.

[0020]

As described in detail above, according to the present invention, in high-density fish culture, dissolved oxygen required for fish growth can be efficiently supplied, and ammonia that is toxic to fish can be removed at the same time. A rotary aeration type biological filtration device can be provided. Therefore, separate aeration equipment and filtration equipment are not required, or the pollution load on the existing filtration equipment can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a rotary aeration type biological filtration device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a main part of the apparatus shown in FIG.

FIG. 3 is a configuration diagram showing another embodiment of the drum type biological filtration tank.

FIG. 4 is a configuration diagram showing a filtration tank equipped with blades of a water turbine on the outer periphery of a drum-shaped biological filtration tank.

FIG. 5 is a perspective view showing the configuration of a rotary aeration type biological filtration device according to another embodiment of the present invention.

FIG. 6 is an explanatory view showing an oxygen supply means in a conventional fish breeding aquarium.

[Explanation of symbols]

1 Motor 2,2-1,2-2 Turbine 2A Blade of a turbine 3,3-1,3-2 Gear box 4,4 'Drum type biological filtration tank 4A, 4B Enclosure 5,5-1,5-2 , 5-3, 5-4, 5A, 5B Float 6 Shaft 7 Bearing 8 Bridging 9 Filtration material 10 Slit

Claims (5)

[Claims] 1. A biological filtration device for supplying dissolved oxygen to breeding water in a tank for breeding fish, comprising a water wheel partly immersed in the breeding water so as to mix oxygen in the breeding water, and a water turbine. A rotary aeration type biological filtration, characterized in that the rotary drum is filled with a filter material in which aerobic bacteria have propagated, and a drum-shaped filter tank that is partially immersed in breeding water and rotates. apparatus. 2. A biological filtration device for supplying dissolved oxygen to breeding water in an aquarium for breeding fish, comprising a motor for generating a rotational force and a motor connected to the motor for mixing oxygen into the breeding water. A part of the breeding water is a part of the breeding water that is rotated by immersing the part in the breeding water and rotating, and a transmission that is connected to the water wheel and a transmission that is connected to the transmission. A drum-shaped filter tank that is immersed in water to rotate, a bearing that supports the rotating shafts of these rotating systems, a float that floats on the water surface on which the motor, transmission, and bearing are mounted, and a member that connects these multiple floats A rotary aeration type biological filtration device comprising: 3. The rotary aeration type according to claim 1, wherein the drum-shaped filtration tank has a mesh-like enclosure on the outer periphery thereof for improving contact between the breeding water and the filter. Biological filtration device. 4. A drum-shaped filter tank is provided with a large number of slits on its outer periphery in the axial direction for improving the contact between the breeding water and the filter material, and each slit is kept inclined to promote the inflow of the breeding water. 3. An enclosure having an enclosure.
A rotary aeration biofilter according to any of the claims. 5. A biological filtration device for supplying dissolved oxygen into breeding water of an aquarium for breeding fish, the motor generating a rotational force, a transmission connected to the motor, and a transmission connected to the transmission, A biological filtration device consisting of a drum-shaped filtration tank that is filled with a filter material in which aerobic bacteria have propagated in a rotating drum, and is partially immersed in breeding water to rotate, and a turbine blade attached to the outer periphery of this filtration tank. And a bearing supporting the rotating shafts of these rotary systems, the motor, the transmission, a float on which the bearing is mounted and floating on the water surface, and a member connecting the plurality of floats. Shaped biological filtration device.