JP2018153159A - Aquarium fish growth system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aquarium fish growth system for effectively using ultrafine bubbles for aquarium fish growth.SOLUTION: An aquarium fish growth system includes: a growth water tank 1 for accumulating growth water for aquarium fish growth; a filter tank 2 filter treating growth water discharged from the growth water tank 1, and accumulating the growth water after filter treatment; a first circulation flow passage 4 having a first circulation pump 4a for returning the growth water after filter treatment to the growth water tank 1; a second circulation flow passage 5 having a second circulation pump 5a for returning the growth water after filter treatment to the filter tank 2 again; and a gas and liquid mixing device 6 for bringing oxygen gas into nano-level bubbles and mixing with the growth water, provided at a downstream side of the second circulation pump 5a of the second circulation flow passage 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ornamental fish breeding system for growing ornamental fish in a breeding aquarium.

  Conventionally, in an ornamental fish breeding system that cultivates ornamental fish in a breeding aquarium, a circulating filtration system that circulates and filters the breeding water has been adopted in order to keep the breeding water in the breeding aquarium in good condition for the ornamental fish. ing. As described above, an ornamental fish breeding system employing a circulation filtration system generally filters the breeding water tank for storing the breeding water for growing the ornamental fish, and the filtration treatment by filtering the breeding water discharged from the breeding water tank. A filtration tank for storing the rearing water and a circulation channel including a circulation pump for returning the rearing water after the filtration process to the cultivation water tank, so that air is mixed with the growth water in the circulation channel. Are also known (for example, Patent Documents 1 and 2).

  On the other hand, it is known that the growth of fish is promoted by increasing the dissolved oxygen amount (DO value) in the edible fish farm. Patent Document 3 discloses that oxygen gas is converted into nano-level bubbles (ultra fine bubbles). A closed circulation filtration aquaculture system including a gas-liquid mixing device (gas-liquid mixed water generating device) that mixes with the breeding water of edible fish has been proposed.

Japanese Patent No. 2556410 JP-A-7-50953 International Publication No. 2015/115159

  The present inventors consider installing the gas-liquid mixing device as disclosed in Patent Document 3 in the circulation channel of the conventional ornamental fish breeding system and utilizing the ultra fine bubble in the ornamental fish breeding system. It was. However, even if a gas-liquid mixing device for generating ultrafine bubbles is installed in the circulation channel, no effect is obtained for growing ornamental fish, but rather the state of growing ornamental fish deteriorates. In other words, in order to generate ultra fine bubbles, it is necessary to arrange a high-power circulation pump in the circulation flow path. Now that it is in the bottom corner of the aquarium, the predation amount of food is much less than normal.

  Therefore, the problem to be solved by the present invention is to provide an ornamental fish breeding system for enabling the ultra fine bubbles to be effectively used for breeding ornamental fish.

  According to one aspect of the present invention, “a rearing water tank for storing rearing water for growing ornamental fish, and a filtration for storing rearing water after filtration by filtering the rearing water discharged from the rearing water tank. A tank, a first circulation channel including a first circulation pump for returning the growth water after filtration to the growth water tank, and a second circulation pump for returning the growth water after filtration to the filtration tank again. An ornamental fish having two circulation channels and a gas-liquid mixing device arranged downstream of the second circulation pump of the second circulation channel to mix oxygen gas with nano-sized bubbles and growing water A training system "is provided.

The ornamental fish breeding system of the present invention has a circulation flow for circulating the breeding water in the filtration tank separately from the circulation channel (first circulation channel) for returning the breeding water in the filtration tank to the breeding water tank. A gas-liquid mixing device is installed in the second circulation channel to convert oxygen gas into nano-level bubbles (ultra fine bubbles) and mix them with the growing water. ing. Thereby, the 1st circulation pump installed in the 1st circulation channel should just have the output required in order to return the breeding water in a filtration tank to a breeding water tank, and in order to produce ultra fine bubble, Compared with the second circulation pump installed in the two circulation channels, the output can be greatly reduced. As a result, the momentum and water noise of the breeding water returned to the breeding aquarium can be reduced, and stress on the aquarium fish (attenuation of the aquarium fish) can be reduced without reducing the ability to generate ultra fine bubbles.
Moreover, in the ornamental fish breeding system of this invention, the production | generation of an ultra fine bubble is performed in the 2nd circulation flow path for circulating the breeding water in a filtration tank. Thereby, the dissolved oxygen amount (DO value) of cultivation water can be controlled (operated) stably.
As described above, according to the ornamental fish breeding system of the present invention, the ultra fine bubble can be effectively used for breeding ornamental fish.

It is a lineblock diagram of an ornamental fish breeding system which is one embodiment of the present invention. It is a block diagram of the ornamental fish breeding system as a comparative example.

  FIG. 1 is a configuration diagram of an ornamental fish breeding system according to an embodiment of the present invention.

  The ornamental fish breeding system shown in the figure includes a breeding water tank 1, a filtration tank 2, an overflow pipe 3, a first circulation channel 4, a second circulation channel 5, and a gas-liquid mixing device 6.

  The breeding water tank 1 stores breeding water for growing the ornamental fish, and the ornamental fish is grown in the breeding water tank 1. The filtration tank 2 filters the growing water discharged from the growing water tank 1 and stores the growing water after the filtering process. Although the filter medium for the filtration treatment is not shown in the drawing, in the present embodiment, the filter medium for physical filtration that physically removes the pollutants that adversely affect the ornamental fish and the filter medium for biological filtration that biologically removes are filtered. It is installed in the tank 2. In addition, a heater (not shown) is installed in the filtration tank 2 in order to raise the temperature of the cultivated water after filtration to a temperature suitable for growing ornamental fish.

  In this embodiment, the discharge method of the cultivation water from the cultivation tank 1 to the filtration tank 2 is an overflow method. That is, the cultivating water tank 1 and the filtration tank 2 disposed therebelow are connected via an overflow pipe 3, and the cultivating water in the cultivating water tank 1 is discharged to the filtration tank 2 by natural flow through the overflow pipe 3. The The method of draining the cultivating water from the cultivating tank 1 to the filtration tub 2 is not limited to the overflow method, but can be a draining method using a drainage pump. From the viewpoint of avoiding this, the overflow method is preferable.

  The 1st circulation channel 4 is a channel for returning the cultivation water after filtration processing in filtration tank 2 to cultivation water tank 1, and is provided with the 1st circulation pump 4a for that purpose. The first circulation channel 4 is provided with a cooler (not shown) for cooling the growing water. That is, in the present embodiment, the growth water after filtration is adjusted to a temperature suitable for the growth of ornamental fish by the heater installed in the filtration tank 2 and the cooler installed in the first circulation channel 4. In addition, you may install temperature control means other than a heater and a cooler in the filtration tank 2 or the 1st circulation flow path 4. FIG. Further, in order to sterilize the growing water after the filtration treatment, a sterilization means such as a sterilization lamp may be installed in the filtration tank 2 or the first circulation channel 4.

  In the present embodiment, the downstream end 4 b of the first circulation channel 4 is located in the growing water in the growing water tank 1. Thereby, the water sound etc. of the breeding water returned to the breeding water tank 1 can be reduced, and the stress on the ornamental fish can be reduced.

  The second circulation channel 5 is a channel for returning the growth water after the filtration treatment in the filtration tank 2 to the filtration tank 2 again, that is, for circulating the growth water in the filtration tank 2, and for this purpose, the second circulation pump. 5a. And the gas-liquid mixing apparatus 6 is arrange | positioned downstream of the 2nd circulation pump 5a of the 2nd circulation flow path 5, and oxygen gas is supplied between the 2nd circulation pump 5a and the gas-liquid mixing apparatus 6. It is like that. The gas-liquid mixing device 6 turns this oxygen gas into nano-level bubbles (ultra fine bubbles) and mixes them with the growing water. As such a gas-liquid mixing device, “Ramond Nanomixer” (registered trademark) manufactured by Nanocus Co., Ltd. can be suitably used.

  In the present embodiment, the downstream end 5 b of the second circulation channel 5 is located above the growing water surface in the filtration tank 2. Thereby, the dissolved oxygen amount (DO value) of cultivation water can be controlled (operated) more stably. That is, according to the test by the present inventors, when the downstream end 5b of the second circulation channel 5 is positioned in the growing water in the filtration tank 2, the dissolved oxygen amount (DO value) of the growing water tends to increase gradually. On the other hand, when the downstream end 5b of the second circulation flow path 5 is positioned above the growth water surface in the filtration tank 2 as in the present embodiment, an increasing tendency of the dissolved oxygen amount (DO value) is seen. It was found that the dissolved oxygen amount (DO value) of the growing water can be controlled (operated) more stably. When the downstream end of the second circulation channel 5 is positioned above the growth water surface in the filtration tank 2, the growth water returns to the filtration tank 2 while entraining air, so that the dissolved oxygen amount (DO value) increases. Is considered to be suppressed. The dissolved oxygen amount (DO value) of the growth water can be controlled (operated) by adjusting the supply amount of oxygen gas.

  In the above configuration, the growing water in the growing water tank 1 is discharged to the filtration tank 2 through the overflow pipe 3 and then returns to the growing water tank 1 through the first circulation channel 4. On the other hand, the growing water in the filtration tank 2 is circulated through the second circulation channel 5, and ultrafine bubbles are mixed in the middle of the second circulation channel 5. Thus, in this embodiment, ultra fine bubbles are mixed in the 2nd circulation channel 5 which is an independent circulation channel separate from the 1st circulation channel 4 for circulating the breeding water in cultivation water tank 1. I am doing so. Thereby, the 1st circulation pump 4a installed in the 1st circulation channel 4 should just have the output required in order to return the cultivation water in filtration tank 2 to cultivation water tank 1, and generates ultra fine bubble. Therefore, the output can be greatly reduced as compared with the second circulation pump 5 installed in the second circulation flow path 5. As a result, it is possible to reduce the momentum and sound of the cultivating water returned to the cultivating water tank 1, and it is possible to reduce stress on the aquarium fish (decrease of the aquarium fish) without reducing the ability to generate ultrafine bubbles. Moreover, in this embodiment, the production | generation of an ultra fine bubble is performed with the 2nd circulation flow path 5 for circulating the cultivation water in the filtration tank 2. FIG. Thereby, the dissolved oxygen amount (DO value) of cultivation water can be controlled (operated) stably.

  The present inventors first started to grow Asian arowana (two kinds of gold and red) using the ornamental fish breeding system shown in FIG. The ornamental fish breeding system of FIG. 2 does not have the second circulation channel 5 shown in FIG. 1, and the gas-liquid mixing device 6 is arranged in the first circulation channel 4. Since a high-power circulation pump is required to generate the ultra fine bubble, the output of the first circulation pump 4a is set to 400 W in the ornamental fish breeding system of FIG. Moreover, as conditions for growing water, the dissolved oxygen amount (DO value) of growing water is 11 to 13 mg / mL, the average particle size of ultra fine bubbles is about 100 nm, and the density (nano density) is 300 to 400 million / mL. It was. As a result of the breeding, the Asian arowana is contracted to the momentum and sound of the breeding water returned to the breeding aquarium 1, so that it always stays in the bottom corner of the breeding tank 1, and the predation amount of the feed is considerably less than the normal state It became a state.

  Therefore, the present inventors continued to grow the same Asian arowana (gold and red) using the ornamental fish breeding system shown in FIG. In the ornamental fish breeding system of FIG. 1, the output of the second circulation pump 5a is 400 W, which is the same as that of the first circulation pump 4a of FIG. On the other hand, the output of the 1st circulation pump 4a of FIG. 1 was made small to 64W as an output required in order to return the breeding water in the filtration tank 2 to the breeding water tank 1. FIG. The conditions of the breeding water are the same as those of the ornamental fish breeding system in FIG. 2, the dissolved oxygen content (DO value) of the breeding water is 11 to 13 mg / mL, the average particle size of the ultra fine bubbles is about 100 nm, and the density (nano density) 3 to 400 million / mL.

  As a result of the breeding, Asian arowana does not appear to be contracted, there is no state that it is always in the bottom corner of the breeding tank 1, and the predation amount of food can be increased to maintain a good health condition. Yes. In addition, when I saw an Asian arowana being nurtured by experts, it was said that the color development was much better than the normal state at the same time and it was beautiful. Moreover, the effect that slime does not generate | occur | produce on the wall surface of the breeding water tank 1 and the filtration tank 2 was also acquired as an incidental effect by an ultra fine bubble. The dissolved oxygen amount (DO value) of the cultivating water was also stably maintained in the range of 11 to 13 mg / mL.

DESCRIPTION OF SYMBOLS 1 Growing water tank 2 Filtration tank 3 Overflow pipe 4 1st circulation flow path 4a 1st circulation pump 4b Downstream end of 1st circulation flow path 5 2nd circulation flow path 5a 2nd circulation pump 5b Downstream end of 2nd circulation flow path 6 Gas-liquid mixing device

Claims (5)

  A breeding aquarium for storing breeding water for growing ornamental fish, a filtration tank for filtering the breeding water discharged from the breeding tank and storing the breeding water after filtration, and a breeding water after filtration treatment A first circulation flow path having a first circulation pump for returning to the growth water tank, a second circulation flow path having a second circulation pump for returning the growth water after filtration to the filtration tank again, and a second circulation flow An ornamental fish breeding system, which is disposed on the downstream side of the second circulation pump of the road and has a gas-liquid mixing device for making oxygen gas into nano-level bubbles and mixing them with the breeding water.   The ornamental fish breeding system according to claim 1, wherein the downstream end of the second circulation channel is located above the breeding water surface in the filtration tank.   The ornamental fish breeding system according to claim 1 or 2, wherein the downstream end of the first circulation channel is located in the breeding water in the breeding water tank.   The ornamental fish breeding system according to any one of claims 1 to 3, wherein an output of the first circulation pump is smaller than an output of the second circulation pump.   The ornamental fish breeding system according to any one of claims 1 to 4, wherein a method for discharging the breeding water from the breeding water tank to the filtration tank is an overflow method.

Images