JP2018153807A - Fine bubble generating device and water tank system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that culture organisms are grown in any way without being stressed, to solve such a difficult problem as to fix and activate micro organisms although filtration using the micro organisms is effective in order to reduce the number of times of water replacement of the water tank, further, to solve such a problem that there is necessity for preventing oxidation of water quality and, furthermore, to solve such a problem that the supply of calcium contents is necessitated because of needy circumstances of calcium contents.SOLUTION: A micro-organism filtration device and a fine bubble generating device are arranged underwater. Underwater remaining oxygen is increased by generated fine bubbles, and culture organisms and fine organisms are activated. When bubbles released underwater from a diffuser pipe by a fine bubble generating device are fined through a diffusion wings of an underwater pump, noise and vibrations can be prevented. The use of aragonite of shell fossil for the supply of calcium is also effective for fixation of micro organisms.SELECTED DRAWING: Figure 3

Description

The present invention relates to an apparatus for generating fine bubbles in water (referred to as a fine bubble generating apparatus).
The present invention also relates to an aquarium system including an aquarium and an apparatus for filtering water used for aquaculture when the microbubble generator is applied to aquatic aquaculture.
The basic principle of the present invention can be applied not only to closed water areas such as aquariums and ginger but also to open water areas such as seas and lakes.

  Moreover, in order to reduce the labor of seawater supply and drainage, which is necessary when cultivating marine organisms, microbial filtration is effective as a method for filtering and circulating aquaculture water. The present invention further relates to a structure of an aquaculture tank in consideration of colonization and activation of microorganisms, a filter medium for colonizing microorganisms, and a method of microorganism activation.

In mountainous areas and remote islands that are far from the city, it is difficult to maintain local industries or create new ones, which causes them to move away from the land where young people grew up, leading to depopulation and an aging population Advances.
In the fishing industry that has been the center of local industry in many islands in the past, islanders have been living aquatic organisms (marine organisms) at sea due to problems such as marine pollution, the effects of commercial fishing by domestic and foreign large fishing boats, and protection of the natural environment. ) Is becoming difficult to capture. As countermeasures, it is often practiced to produce ginger on the coast and aquaculture, but this is a limited solution because it is limited in the places where it can be carried out and this method does not eliminate the effects of marine pollution. Absent.

Applicants of this patent consistently aim at aquaculture of aquatic organisms not affected by marine pollution on land, and hope that it will help solve the problem of depopulation by commercializing it. I went.
The present invention was born from such a background, but it was an invention made while aquatic organisms were cultivated particularly in mountainous areas and remote islands where depopulation has progressed.

First, terms related to bubbles used in the text are defined.
“Microbubble” generally refers to a fine bubble having a bubble diameter of 10 micrometers (referred to as 10 μm after 1/100 mm) to several tens of micrometers,
“Micro-nano bubbles” refers to bubbles having a diameter of several hundred nanometers (hereinafter referred to as “nm”) to 10 μm). further,
“Nanobubble” refers to a bubble having a diameter of several hundred nm or less, but it is difficult to visually check because the bubble size is small and dissolves in water in a short time. However, it works to increase the gas concentration in the water.
“Fine bubbles” is a general term for commonly used microbubbles, micronanobubbles, and nanobubbles.

  Microbubbles are considered to become micro-nanobubbles with the passage of time, and when this size is reached, the shrinkage speed increases and decreases rapidly. Many nanobubbles are generated in this process.

  Microbubbles increase the oxygen concentration in water, activate aquatic organisms, and activate microorganisms that filter ammonia and nitrite components excreted by aquatic organisms. As described in Patent Documents 1 to 3 below, as a method for generating a large amount of microbubbles, conventionally, a pressure reduction method (a method in which gas is pressurized and dissolved in water in large quantities and then re-bubbled by pressure reduction). And gas-liquid shearing (a method in which gas is introduced into the liquid and the fan is rotated several hundreds per second to cut and pulverize the gas), and fine bubbles are generated through high-pressure air in a film with fine pores. A fine pore pressurizing method is known. Moreover, the following patent documents 4 and 5 are disclosed as prior arts as prior arts for using fine bubbles in aquatic aquaculture.

Japanese Patent Application Laid-Open No. 2014-069160 Bubble generation by pressure reduction method Patent 5099612 Bubble generation by pressurized air diffusion method JP, 2009-119400, A Micropore pressing method JP-A-2007-152275 Purified water tank Cross-flow pump aeration

  Although the example of the method of generating a fine bubble was described in the prior art document article, all of these require a large-scale apparatus, and cannot be easily applied to a small tank. And since high pressure and high-speed rotation are required, vibration and noise are inevitably generated, and depending on the organism to be cultivated, the growth may be delayed or die.

  For example, in order to generate bubbles by the method described in Patent Document 1, a gas-liquid mixed fluid in which a gas is injected into a liquid and is pressurized to a pressure higher than the atmospheric pressure is reduced to a pressure lower than the atmospheric pressure, and then the pressure is increased to the atmospheric pressure. Therefore, since it is a method of generating fine bubbles, the apparatus becomes large, and vibration and noise cannot be avoided. Therefore, it is difficult to use for the cultivation of sensitive marine organisms.

  In the method described in Patent Document 2, gas discharge is caused between two electrodes under atmospheric pressure, the gas is turned into plasma to generate an activated gas, and the gas activated by the microbubble generator is covered. Microbubbles are formed into bubbles with a diameter of 1 to 100 μm in the treatment liquid to generate a gas-liquid mixed fluid. This method is also used for aquaculture of aquatic organisms. Dissolved substances may undergo chemical changes and harmful substances may be generated. In addition, metals such as metals used for the electrodes may be mixed into the aquaculture water due to discharge.

Patent Document 3 is a method of diffusing a gas supplied from a gas supply facility into water into fine bubbles, but it is a commonly used method for generating bubbles, and a rejection assessment has been established.
In this method, the amount of fine bubbles generated is small, and if this amount is to be increased, a powerful pump is required and it is difficult to place it near the water tank. Of course, the technology is different from the apparatus for generating fine bubbles used in the present patent.

Moreover, in patent document 4, as a water treatment method which can improve the water quality of breeding water and can reduce running cost,
It is equipped with a micro-nano bubble treatment tank, gravity filtration tank and breeding tank circulation pump, and the micro-nano bubble treatment tank is introduced with breeding water used for raising fish from the breeding tank and contains micro-nano bubbles in the breeding water from the breeding tank However, there is no description about the micro / nano bubble generator.

  Moreover, although the example which uses calcium carbonate for the filter medium is described, generally said calcium carbonate is a crystal called calcite and the amount which dissolves in water is small. In addition, since it is not porous, it is difficult to be a filter medium on which microorganisms settle. Calcium carbonate in the patent of the present application is porous calcium carbonate produced as a fossil shellfish and is an aragonite that easily settles microorganisms, but there is no description about it.

“Aragonite” is written as “Arareite” in Japanese, and “aragonite” in English. In general, in addition to “Aragonite”, it may be written as “Argonite”.
This is because various types of nekton (fishes), plankton (microorganisms), algae, seaweed, etc., which are composed of calcareous materials, etc. have been buried alive due to sudden crustal movements. It is said that the organic matter has decomposed and corroded to form a soluble fossil body that does not retain its original form.

For this reason, aragonite is a collection of extremely fine particles of calcium carbonate, the main component of which is secreted and formed from proteins, and is a porous object with characteristics that are much more active than ordinary limestone. Yes.
When microorganisms are fixed on this aragonite, placed in water, and used as filtration, the microorganisms are fixed better than other calcium carbonate modes.

Microorganisms that are used for microbial filtration to oxidize ammonia in water and convert it to nitrous acid are aerobic microorganisms that act while digesting large amounts of oxygen and alkali components. For this reason, the nitrification effect is dramatically enhanced by supplying fine bubbles to microorganisms. At the same time, however, it acidifies the water, so it is important to neutralize it and replenish calcium components in the water. By using aragonite as a filter medium on which microorganisms are fixed, and sending fine bubbles to the filter medium, the filtration effect can be dramatically improved. Aragonite is porous and not only easily settles microorganisms, but also dissolves in water, so it has an effect of supplementing calcium important for aquaculture organisms.
There are examples where shells are used as a filter medium, but the two effects of colonization of microorganisms and calcium supplementation are low. Compared with this, the method described in this patent has an overwhelmingly high filtration effect.

Patent Document 5 discloses a patent relating to an aeration apparatus that efficiently and uniformly supplies a large amount of fine bubbles together with a water flow into the entire tank in an aeration tank, a culture tank, and a culture tank.
A pump aeration device composed of a cylindrical multi-blade impeller-shaped once-through pump (cross-flow pump) having a microbubble generation mechanism is installed in an aeration tank, an aquaculture tank, and a culture tank. In this technology, a wide flow of water is supplied together with microbubbles to achieve effective aeration.
However, this is a technique used in aeration tanks and large-scale aquaculture tanks, and when placed in the aquaculture tanks, the aquatic organisms in the aquaculture tanks cannot inhabit due to vibration, noise, and intense water flow. Moreover, since a once-through pump is used, a large amount of electric power is consumed and the water temperature rises. For this reason, it cannot be used for small-scale aquaculture tanks.

  In addition, in order to realize an aquaculture tank in a space-saving manner, in order to circulate the aquaculture water not only in the upper and lower tanks, but also between the upper and lower tanks, when the tanks are stacked in two stages. In addition, it is necessary to install a pumping pump in the aquarium.

If a lot of pumps with high noise and vibration are used in the aquaculture tank in this way, the appetite of the aquaculture organisms will be affected, and the growth will be remarkably slowed or even killed.
Furthermore, the device becomes larger, the power consumption increases and the temperature of the aquarium rises, and this also affects the environment of the organisms being bred.
In addition, it is difficult to settle microorganisms in biological filtration using microorganisms, and it cannot be used as a practical level at aquaculture sites. A device called a protein skimmer is said to be effective in ornamental aquariums, but in many cases, a water change is also used.

Solution

  An air supply pump, an air supply pipe connected to the air supply pump, an air supply pipe connected to the air supply pipe, disposed in the water area, and discharging primary bubbles into the water area; Arranged at the position where the primary bubble miniaturization unit that takes in from the inlet and stirs in the bubble miniaturization unit to make microbubbles collides with the secondary bubbles released into the water area from the primary bubble miniaturization unit The secondary bubble that is made into a microbubble by generating the secondary microbubble by taking in the microbubble receiving plate and the secondary bubble from the bubble intake and further stirring in the secondary bubble miniaturization unit A miniaturization unit is used.

  At that time, the fine bubble receiving plate is disposed so that the upper part thereof is close to the bubble discharge port of the primary bubble refinement unit and the lower part thereof is inclined so as to be far from the bubble discharge port of the primary bubble refinement unit, Of the secondary bubbles, relatively large bubbles (microbubbles) are guided to the secondary bubble refining unit, and relatively small bubbles (nanovalves) are released into the water tank as they are.

A certain range in the water area is surrounded as an aquaculture tank, and the aragonite with microorganisms fixed together with the fine bubble generator according to claim 1 is arranged in the aquaculture tank, and the microorganisms fixed to the aragonite have fine bubbles. Supplying activates microorganisms and enhances water filtration effect.
The primary bubble discharge port used here may be one end of an open air supply tube, but it is more preferable to use a diffuser tube made of a porous material because the bubbles can be easily made finer.

  Next, the microbubble generator is further equipped with a microbubble storage chamber, and microbubble water discharged from the primary bubble miniaturization unit is introduced and stored in the bubble storage chamber, and the secondary bubble miniaturization unit sucks bubbles. The mouth is arranged at a position higher than the bubble outlet of the first fine bubble generator.

A bubble receiving plate is disposed at a position where the secondary bubbles released from the bubble discharge port of the primary bubble refining unit collide with the secondary bubble storage chamber. Among bubbles, relatively large fine bubbles (mainly microbubbles) are lifted as they are, and relatively small bubbles (mainly nanobubbles) are floated without rising, and are sorted by size.
The relatively small bubbles are discharged into the water area from the discharge port provided in the lower part of the fine bubble water storage chamber.
On the other hand, relatively large bubbles (microbubbles) rise in the microbubble water storage chamber and are sucked into the secondary bubble miniaturization unit through the bubble inlet of the secondary bubble miniaturization unit, and stirred by the stirring blades inside Then, the bubbles are further refined and discharged as tertiary bubbles from the tertiary bubble discharge port.

Although this device is supposed to be used in a water tank, it can also be used for aquaculture on an open water surface.
Also, prepare a purified water tank with a microbubble generator inserted, filter the water in the large aquarium by drawing in the water in the large aquaculture tank using a pool, etc., and returning to the large aquaculture tank after purification. Can also be used in some cases.

Moreover, in order to reduce the installation area of a water tank, a water tank can be piled up and down in several steps, and a bubble refinement | miniaturization unit or a fine bubble generator can be arrange | positioned in a lower water tank.
A bubble sending pipe is provided for sending fine bubbles in the water tank in which the bubble refining unit or the fine bubble generator is installed to the upper water tank, and the fine bubble discharge port which is the tip of the bubble sending pipe is horizontally or downwardly placed in the upper water tank. The water is circulated in the upper liquid tank.

In addition, a biological filtration device can be arranged in the water tank, and microorganisms in the water tank can be activated by the fine bubbles to enhance the filtration effect.
In particular, the use of porous zeolite or aragonite with microorganisms fixed in the filtration device further enhances the filtration effect.

Effect of the invention

Various effects can be utilized by generating high concentration fine bubbles in water using the fine bubble device of the present invention.
As for things that are easy to see, the bubbles attach to the foreign matter in the water and float up, and flow into the overflow pipe with the water that exceeds the waterline of the upper tank, and filter the residue mixed in the water, There is an effect that foreign matter can be easily removed.

The most central effect is the effect of increasing the oxygen concentration in water by releasing and melting fine bubbles in water.
In the culture of microorganisms, symbiotic culture of lactic acid bacteria and saccharifying bacteria is said to be promoted 10 times or more compared to the case of culturing each alone, but if this apparatus is used, it is further accelerated 10 times. There is also data that. This method enables mass culture of microorganisms.

Furthermore, increasing the oxygen concentration of the aquaculture water using the technology of the present invention not only promotes the growth of the aquaculture organisms, but when microbial filtration is used, activates the microorganisms used for filtration and reduces the frequency of replacement of the aquaculture water. Can do.
Moreover, since the filtration performance by microorganisms also increases and the oxygen concentration also increases, aquaculture organisms can be grown at high density even in a narrow aquarium. This is a big industrial effect.

  In addition, according to the experience of the patent inventor of the present application, when the larvae were transported, they were pointed at the airport for more than a day and arrived in a tentative state. When kept in a normal aquarium as it was, there was a possibility of annihilation, but at this time there was a track record that more than 60% of the individuals were regenerated by curing in the aquarium of the present invention.

  In addition, the feature of the device of the present invention is that the air that has already been released from the primary bubble discharge port is made into fine bubbles with a submersible pump. A high pressure and high rotation are not required, and a device with low vibration and noise can be realized.

  In general, aquatic organisms are not limited to aquatic aquaculture, and their growth is greatly affected by the environment. When vibration is applied, appetite declines rapidly, and not only does growth stop, but it can also die. If the technology of the present invention is used, water is circulated with a fine bubble generator with little vibration, so that it is possible to provide a favorable growth environment for aquatic organisms and to promote its growth.

In this way, a fine bubble generator with less vibration and noise can be realized with the minimum number of parts generally available on the market.
Land culture can be carried out with such a simple device.

  In addition, since the purification of water by microorganisms can be realized efficiently, it is possible to reduce the number of water changes, which makes it easier to cultivate aquatic organisms on land. Especially in the cultivation of marine organisms, not only the water supply but also the drainage of salty water is reduced, and the environment for aquaculture is expanded.

  In addition to being used for aquaculture, a small and lightweight device can be obtained by applying the technique of the present application to applications where a large amount of gas needs to be dissolved in the water body.

The present invention has been made for application to aquatic aquaculture, but is not limited to this and can be applied to other industries. There is an effect of fine vibrations (ultrasonic waves, etc.) generated when microbubbles are crushed in water. This can be applied to beauty treatments such as washing and skin irritation.
For example, it can be suitably used for cleaning using fine bubbles, and in that case, for example, it is easily conceivable to use cleaning oil instead of water within the same technical scope. It is also possible to use a gas necessary for the treatment instead of air.

  Bubble miniaturization unit   Microbubble generator   First embodiment   Second embodiment   Application example of microbial filtration

The configuration of the bubble refining unit 2 and the fine bubble generating device 3 will be described with reference to FIGS. 1 and 2.
The air diffuser 35 is disposed in the water, and the air diffuser 34 is connected to the air diffuser 35 in order to guide the gas (air) sent by the air pump 33.

  The position of the air diffuser 35 is arranged at a position lower than the air bubble inlet 22 so that the primary air bubbles 16 released into the water from the air diffuser 35 are easily taken in from the air bubble inlet 22 of the air bubble miniaturization unit 2. The air diffusion pipe 35 may be arranged on the floor of the water tank 1, but in order to stabilize the positional relationship with the air bubble inlet 22, a shelf (not shown) is attached to the submersible pump installation base and installed on the shelf. May be.

  Further, in order to prevent the primary bubbles 16 released from the air diffuser 35 from diffusing and efficiently lead to the bubble suction port 35, a bubble scattering prevention wall 40 is provided as appropriate.

  The bubble refining unit 2 sucks the bubbles 21 together with the aquaculture water 11 in the water tank 1, agitates the inside thereof to generate the fine bubbles 26, and discharges them from the fine bubble outlet 25.

  Further, when it is necessary to make the bubbles finer or when uniform fine bubbles are required, it can be realized by connecting a plurality of bubble miniaturizing units 2 in series. However, in this case, it is effective not to simply arrange the bubble miniaturization units 2 but to make a difference in height as shown in FIG.

  The plurality of bubble miniaturization units 2 connected in series are referred to as a primary bubble refinement unit 31, a secondary bubble refinement unit 32,. The primary bubbles 16 discharged from the air diffusion pipe 35 are taken in from the bubble suction port 22 of the primary bubble fine unit and stirred in the primary bubble refinement unit 31 to generate the secondary bubbles 17. The secondary bubble refining unit 32 takes in the secondary bubble 17 from the bubble suction port 22 and discharges it into the water area through the secondary bubble discharge port 38. By stirring, the third fine bubbles 18 are generated and discharged from the third bubble discharge port 39 into the water area.

  The microbubble generator 3 is further provided with a microbubble water storage chamber 37. The microbubble water discharged from the primary bubble miniaturization unit 31 is introduced and stored, and the secondary bubble miniaturization is performed. The bubble suction port 22 of the unit 32 is arranged at a position higher than the secondary bubble discharge port 38 of the first fine bubble generator 31.

A bubble receiving plate 36 is disposed at a position where the secondary bubbles 17 emitted from the bubble discharge port 38 of the primary bubble refining unit 31 collide. Sorting by size by utilizing the property that microbubbles collide with each other and relatively large microbubbles rise as they are, while relatively small bubbles float without rising.
The relatively small bubbles are accumulated in the fine bubble water storage chamber 37 and then discharged from the stored bubble discharge port 41 provided in the lower part.
On the other hand, relatively large bubbles are sucked in from the suction port of the secondary bubble refining unit 32 disposed at a position higher than the fine bubble discharge port of the first submersible pump, and are stirred inside, and the bubbles are further refined. The This bubble is referred to as a tertiary bubble 18.

FIG. 3 shows an example in which the fine bubble generating device 5 of the present invention is applied to an aquatic organism culture device using an example microorganism filtration device as a first implementation.
In this example, the floor of the water tank 1 is inclined, and the fine bubble generating device 3 is installed in the lower part thereof.
This is to make fine bubbles adhere to the excrement of aquatic organisms in the aquarium 1 and the residue 14 that has descended along the slope, thereby facilitating levitation.

FIG. 4 shows a second embodiment. An aquaculture water 11, a microorganism filtration device 4 and an overflow pipe 12 are installed in the water tank 1. The overflow pipe 12 is arranged vertically, and the lower end thereof penetrates the water tank 1.
And the upper end is set so that the water level does not rise any more according to the height of the highest water level in the water tank 1.
The excrement and residue to which fine bubbles are attached floats on the surface of the aquaculture water 11 and flows into the overflow pipe 12 together with the aquaculture water. The water that has flowed in passes through the residue filter 56 in the middle and then filters out waste and residue and then flows into the lower water tank 62. However, the overflow pipe 12 does not necessarily pass through the water tank 1, and the height of the overflow water discharge port is high. It suffices if it is located at the lowest end of the entire overflow pipe 12.

Place aquatic organisms 13 to be cultivated in the aquarium 1.
The fine bubbles 19 generated by the fine bubble generator 3 are diffused in the water tank 1 to increase the oxygen concentration of the aquaculture water, and settle in the ascending water filter 51 and the descending water filter 52 used for microbial filtration as well as the aquaculture organism 13. Activate the activated microorganisms, especially aerobic microorganisms, to significantly enhance the ability to nitrify ammonia and nitrous acid in water.

  The ascending water filter 51 and the descending water filter 52 are often made by fixing nitrifying bacteria to a porous stone material, but if nitrifying bacteria can be fixed, other materials such as activated carbon and carbon fiber are also used. Is possible.

When highly toxic ammonia is nitrified, aquaculture water can be used for a long time, but it still tends to acidify gradually.
For this purpose, a pH adjusting agent is preferably introduced into water.
There is also a problem that calcium in water is reduced.
For this reason, when a calcium replenisher is also added, when this is eluted in water, the pH is directed toward the alkali.

Calcium carbonate crystals are introduced into water as a pH adjuster and as a calcium supplement.
Aragonite is a type of calcium carbonate crystal. This is a fossilized shellfish, and when the aquaculture water is acidified, it dissolves in the water, so that calcium is replenished and there is a PH adjustment effect (preventing acidification of water).

Aragonite is a porous material. Since microorganisms are not rooted in the filter medium, even if they temporarily propagate on the surface, they are easily washed away by the flow of water or bubbles. Microorganisms that settle on a porous material have a pore size that matches the size of the microorganism. If so, the microorganisms that inhabit the porous filter medium are not easily washed away from the pores, and thus are easily settled.
In this regard, aragonite and zeolite have a hole diameter suitable for microorganisms used for water filtration. Calcite (calcite), which is the same crystal of calcium carbonate, does not easily dissolve in water and is not suitable for this application.

In order to fix microorganisms in the pores, it is necessary to sufficiently deliver oxygen to the pores.
However, if the bubble diameter is large, the bubble cannot enter the hole, and sufficient oxygen is not supplied to the bacteria in the hole. For this purpose, it is not sufficient to supply fine bubbles to the microbial filtration device by the conventional method of discharging the bubbles into the water using an air diffuser. The fine bubbles can deliver oxygen directly to the microorganisms in the pores of the filter medium, and can dramatically increase the oxygen concentration in the water, thereby further activating the microorganisms.

Further, in order to effectively activate microorganisms, a bubble sending pipe is directly connected to the bubble discharge port 17 or 18 of the fine bubble generating device, and the fine bubbles are sent directly to the rising water filter or the falling water filter. Can take the way.
At this time, if the submersible pump 53 is inserted between the bubble discharge port 17 of the fine bubble generating device and the bubble sending pipe 63, the fine bubble water can be reliably fed into the microorganism.
Calcite (calcite), which is the same crystal of calcium carbonate, does not easily dissolve in water and is not suitable for this application.

The microbial filtration is to prevent the ammonia component discharged from the cultured organism 13 and the food residue from accumulating in water. Ammonia is generally converted to nitrous acid by an aerobic microorganism, and the nitrous acid produced there is further converted to nitrate by an aerobic microorganism. In general, nitrate is also effective as a plant fertilizer and has no toxicity like ammonia.
This conversion is generally referred to as nitrification, but nitrification can be strengthened by activating microorganisms with fine bubbles.

Further, when the water is used in the aquaculture while purifying the water as in the present invention, the water change can be reduced.
This is very effective when cultivating marine organisms on land, but if water is not changed for a long period of time, there is a problem that the calcium component in the water tends to be insufficient and the water is acidified.
When aragonite is used as the filter medium, this point is also preferable. In other words, when water is acidified, calcium carbonate aragonite gradually elutes into the water to neutralize the aquaculture water and prevent acidification.

  However, since aragonite has a high specific gravity, it is easy to work when mixed with porous zeolite having a relatively low specific gravity.

  FIG. 5 shows an example of application of microbial filtration. In the rising water filter 51, zeolite or aragonite in which microorganisms are fixed is inserted as a filter medium 55 in a fixed container. By adding fine bubbles from the bottom and generating an upward flow of fine bubbles and water, there is an effect of activating microorganisms fixed on the filter medium 55 and exchanging water in the rising water filter 51.

  Furthermore, in order to activate microorganisms, the falling water filter 52 makes fine bubbles come into contact with the filter medium 55 inserted in a certain container from above. At this time, by sucking water from the lower part of the descending water filter 52, the microorganisms fixed on the filter medium are activated and the water in the descending water filter 52 is exchanged.

  This device can be installed in the sea or river, but it can also be used on aquaculture tanks on land. In that case, install this device in the aquaculture tank.

  When a water tank is installed and used in a narrower building or the like, the water tank is stacked in a plurality of stages up and down. At that time, water containing fine bubbles is circulated between the upper water tank 61 and the lower water tank 62. There is a need.

At this time, the following method is an effective method that can be performed without generating noise and vibration.
The water tank 1 is vertically stacked in a plurality of stages, the fine bubble generating device 3 is disposed in the lower water tank 62 positioned relatively lower, and the fine bubbles generated in the fine bubble generating device 3 are discharged into the lower water tank 62. At the same time, a foam sending pipe 63 is provided to send the gas to the upper water tank 61 positioned relatively above, and an upper fine bubble discharge port 64 which is the tip of the foam sending pipe 63 is disposed in the upper water tank 61.
The upper fine bubble discharge port 64 which is the tip of the bubble sending pipe is directed horizontally in the upper liquid tank 61 as shown in FIG.

When the bubble refinement unit 2 uses a resin stirring blade 23, a gentle flow can be created without generating noise and vibration.
Vibrations and noise add stress to aquatic organisms, reduce appetite, stop growing, and in some cases die. By using it, water and bubbles can be circulated from the lower aquarium 62 to the upper aquarium 61 without using a separate pump. This method of replenishing the water tank 61 is effective.

  Usually, such a primary bubble miniaturization unit 31 is used, but when finer bubbles are required, it is discharged from the secondary bubble discharge port 38 of the primary microbubble miniaturization unit 31. The secondary bubble 17 is further taken in from the bubble suction port 22 of the secondary bubble miniaturization unit 32 and stirred in the secondary microbubble refinement unit 32 to release the fine bubbles from the tertiary bubble discharge port 18. To do.

Among the secondary bubbles 17 discharged from the secondary bubble discharge port 38, relatively fine bubbles drift without rising, but relatively large bubbles tend to rise immediately. Therefore, when the bubble suction port 22 of the secondary bubble miniaturization unit 32 is placed at a higher position than the first fine bubble discharge port 38, the secondary bubble refinement unit 32 sucks larger bubbles into microbubbles. Take the job.
On the other hand, even if the fine bubbles out of the bubbles released from the secondary bubble miniaturization unit 32 are released as they are into the water area, the effect as the fine bubbles can be exhibited.

  Further, when a fine bubble water storage chamber 37 is provided to surround the secondary bubble discharge port of the primary bubble refinement unit 31 and the bubble suction port 22 of the secondary bubble refinement unit 32, the primary bubble refinement is provided. The fine bubbles released from the unit 31 are prevented from suddenly diffusing into the water, and the bubbles can be efficiently supplied to the secondary bubble refinement unit 32.

Example 2 is shown in FIG. This is an effective way to save time and effort during aquaculture because the tanks are stacked in two stages and the space in the building is used efficiently.
The aquaculture organism 13 can be put into the upper water tank 61 and the lower water tank 62 together. Of course, either one is possible.

The microorganism filtration device is installed in the lower water tank 62.
The fine bubble generating device 3 is also installed in the lower water tank 62. The cultured bubbles 2 in the upper water tank 61 and the lower water tank 62 are circulated by the fine bubbles 18 generated thereby, and oxygen is supplied to the microorganisms in the microorganism filtration device 5 to activate them.

  The fine bubbles 18 are also sent to the upper water tank 61 through the foam sending pipe 63. In some cases, the submerged pump 53 is sandwiched between the stored bubble discharge port 41 and the bubble sending pipe 63 to efficiently send fine bubbles to the rising water filter 51 or the falling water filter 51. At this time, water rises or falls together with the bubbles and circulates in the water tank. Since the rising water flow is generated in this way, if the present invention is implemented, it is not necessary to separately use a pump for pumping water into the upper tank 61, so that noise and vibration can be reduced, and the aquaculture water can be realized. Temperature rise can also be prevented.

If the solid matter and the rest of the food discharged into the aquarium by the aquaculture organisms 13 are left unattended, they will float in the water. However, when bubbles are released into the water, it has the effect of being attached to the solid matter and the rest of the food.
These can be removed by adding an overflow pipe 12 having an entrance at the waterline position at the upper part of the water tank and flowing out floating substances. When draining with water, the residue filter 56 is used for removal and the water is returned to the aquarium.

DESCRIPTION OF SYMBOLS 1 Aqua tank 11 Aquaculture water 12 Overflow pipe 13 Aquaculture organism 14 Floating or floating excrement and residue 15 Removed discharge and residue 16 Primary bubble 17 Secondary bubble 18 Tertiary bubble 19 Floating in water Microbubble 2 Bubble refinement unit 21 Bubble 22 Bubble inlet 23 Stirring blade 24 Submerged motor 25 Fine bubble outlet 26 Fine bubble 3 Fine bubble generator 31 Primary bubble refinement unit 32 Secondary bubble refinement unit 33 Air supply pump 34 Air supply pipe 35 Air diffusion pipe 36 Bubble receiving plate 37 Fine bubble water storage chamber 38 Secondary bubble discharge port 39 Third bubble discharge port 40 Bubble scattering prevention wall 41 Stock bubble discharge port 5 Microbial filtration device 51 Ascending Water filter 52 Lower precipitation filter 53 Submersible pump 54 Flow of filtered water 55 Filter medium 56 Residual filter 6 Two-stage water tank 61 Upper water tank 62 Below Water tank 63 Okuawa pipe 64 top water tank fine bubbles outlet

Claims (2)

  A water area, an air supply pump, an air supply pipe connected to the air supply pump, an air supply pipe connected to the air supply pipe, disposed in the water area, and discharging primary bubbles into the water area; The primary bubble miniaturization unit that takes primary bubbles from the bubble inlet and makes them fine, and the secondary bubbles released from the primary bubble refinement unit into the water area collide with each other. An air bubble receiving plate and a secondary air bubble refining unit that takes in the secondary bubbles from the air bubble inlet and further refines the air bubbles. A fine bubble generating device, characterized in that the fine bubble generating device is disposed near the fine bubble discharge port of the gasification unit, and the lower part thereof is inclined so as to be far from the fine bubble discharge port of the primary bubble refinement unit.   A water tank system in which a certain range in the water area is surrounded as a culture tank, and the microbubble generator according to claim 1, the microorganism used for water filtration, and aragonite or porous zeolite are arranged in the culture tank.