KR100610589B1 - Effluent treatment system for aquafarm - Google Patents

Abstract

A first biofilm filtration tank in which the discharged water from the aquaculture farm enters the lower part, moves upwards, and a porous media is installed therein, so that the remaining suspended matter and dissolved organic matter and the ammonia nitrogen in the water are reliably removed; Water passing through the first biofilm filtration tank flows upward and moves downwards, and ozone reaction tank into which oxygen and ozone are injected, and water passing through the ozone reaction tank flows upward and flows downward by indirect aeration. It provides a effluent treatment system of aquaculture farms including a second biofilm filtration tank in which the porous filter media is installed, and an ozone degassing tank in which water passing through the second biofilm filtration tank flows downwardly and moves upwards and is aerated.

Aquaculture, Land Tank, Seawater, Pollution, Biofilm Filtration, Porous Media, Aeration, Ozone

Description

Aquaculture effluent treatment system {Effluent treatment system for aquafarm}

1 is a cross-sectional view schematically showing a first embodiment of the wastewater treatment system of aquaculture farms according to the present invention.

2 is a cross-sectional view showing a second biofilm filtration tank in the first embodiment of the wastewater treatment system of the farm according to the present invention.

Figure 3 is a perspective view showing a dispersion plate in a first embodiment of the wastewater treatment system of aquaculture farms according to the present invention.

4 is a cross-sectional view showing a second embodiment of the ozone degassing tank in the first embodiment of the wastewater treatment system of the farm according to the present invention.

5 is a cross-sectional view schematically showing a second embodiment of the wastewater treatment system of the farm according to the present invention.

6 is a cross-sectional view schematically showing a third embodiment of the wastewater treatment system of aquaculture farms according to the present invention.

7 is a cross-sectional view schematically showing a fourth embodiment of the wastewater treatment system of the farm according to the present invention.

<Description of the symbols for the main parts of the drawings>

2: farm 3: drainage 4: drain pipe

6: pump 10: first biofilm filtration tank 11: hole

12: Dispersion board 13: Media 20: Ozone reactor

22: dispersion plate 28: communication hole 29: communication hole

30: second biofilm filtration tank 32: dispersion plate 33: porous filter medium

34: dispersion 36: width 40: ozone desorption

42: dispersion plate 44: activated carbon filtration tank 46: pH buffer

50: heat exchange tank 60: ozone generator 62: ozone nozzle

64: ozone tube 70: air supply device 72: aeration nozzle

74: air engine 80: tank 81: first partition

82: second partition 85: communication hole 86: communication hole

87: communication hole 88: communication hole 89: connecting passage

91: first connector 92: second connector 93: third connector

95: fourth connector 96: fifth connector 98: recirculation tube

99: recirculation pipe

The present invention relates to a effluent treatment system of aquaculture farms, and more specifically, to a combination of indirect aeration biofilm filtration using porous media and ozone denitrification using a catalytic reaction of bromine (Br) ions. It relates to a effluent treatment system in aquaculture farms that effectively treats effluents for recycling.

In general, due to pollution and aging of coastal fisheries, aquaculture in coastal waters has a marked decline in productivity, and it is difficult to secure aquaculture sites due to natural disasters such as red tide. The use of fish farms is increasing.

However, it is difficult to secure stable breeding water due to the increase of coastal pollution, and there is a problem of increasing coastal pollution by releasing large amounts of polluted effluent to the coast.

Therefore, there is an urgent need to develop a method for effectively treating and recycling wastewater in land tank farms.

Conventionally, treatment facilities such as sedimentation basin and three-stage screening net mixing facility, sedimentation basin and inclined screen mixing facility, sedimentation basin facility, sedimentation basin and drum filter facility, drum filter facility and inclined screen facility are used as the facilities for treating the discharge water of land tank farm In most cases, due to inefficiency and maintenance difficulties, their use is avoided due to inefficiency and inefficiency.

In particular, in case of operating a farm based on regional characteristics, such as Jeju, the rate of return is large, so the amount of seawater used is large, the concentration of effluent is large, and the fishery agent used to prevent fish disease remains. The use of conventional treatment facilities is practically impossible.

In order to solve the problems of the conventional wastewater treatment facility of the aquaculture farm, Korean Patent Laid-Open Publication No. 1997-68831 proposes a circulating filtration system of aquatic fishery marine fish farming facility by biofilm filtration and ozone denitrification.

The present invention is an improvement of the circulating filtration system of aquaculture facilities disclosed in Korean Patent Laid-Open Publication No. 1997-68831, which has a low specific gravity [0.04 ± 0.01 g / cm 3] porous media by forming a flow in a downward flow by indirect aeration. It is an object of the present invention to provide a effluent treatment system for aquaculture farms in which a biofilm filtration tank kept in a sedimentation state is additionally installed to ensure removal of residual suspended solids and dissolved organic substances and removal of ammonia nitrogen in water.

The wastewater treatment system of the aquaculture farm proposed by the present invention includes a first biofilm filtration tank in which the effluent discharged from the aquaculture farm flows into the lower part and moves upwards, and a porous filter is installed therein, and water passing through the first biofilm filtration tank is upper part. Ozone reaction tank that flows into the downstream flow and oxygen and ozone is injected, and the water passing through the ozone reaction tank flows upward through the indirect aeration and the second biofilm filtration tank is installed inside the porous media And, the water passing through the second biofilm filtration tank is made to include an ozone degassing tank is introduced into the lower portion to move upward flow and aeration of the air.

As the porous filter installed in the first biofilm filtration tank and the second biofilm filtration tank, it is preferable to use a material having a porosity of 90% or more and to prepare a particle size of 2 to 20 mm.

In particular, when the expanded synthetic resin (for example, expanded polyurethane, etc.) is used as the porous medium, the microorganism can easily penetrate into the carrier because the porosity is very high, 95 to 96%, Oxidized pollutants (organic matter, ammonia nitrogen, etc.) dissolved oxygen can be effectively delivered, and backwashing for periodic removal of filtrates and proliferating microorganisms has the characteristics that can be performed efficiently with only low power.

Next, a preferred embodiment of the wastewater treatment system of aquaculture farm according to the present invention will be described in detail with reference to the drawings.

First, the first embodiment of the wastewater treatment system of the farm according to the present invention, as shown in Figures 1 and 2, the discharged water 3 discharged from the farm 2 is introduced into the lower portion to move upward flow and The first biofilm filtration tank 10 in which the porous filter medium 13 is installed, and the water passing through the first biofilm filtration tank 10 flow upwardly and move downwards, and the ozone reaction tank 20 in which oxygen and ozone are injected. And a second biofilm filtration tank 30 in which water passing through the ozone reaction tank 20 flows upward and moves downward by indirect aeration, and a porous filter 33 is installed therein, and the second biofilm filtration tank. Water passing through the 30 is introduced into the lower portion is moved upstream and comprises an ozone degassing tank 40 made of aeration of air.

The porous media 13 and 33 installed in the first biofilm filtration tank 10 and the second biofilm filtration tank 30 are made of a material having a porosity of 90% or more and having a particle diameter of 2 to 20 mm. It is preferable to use.

When the porosity of the porous media 13 and 33 is lower, it is difficult for microorganisms to easily penetrate into the carrier, and it is difficult to transfer organic matter and dissolved oxygen to the microorganisms fixed inside the carrier.

Therefore, the removal of particulate suspended solids (SS) by the porous media (13, 33) is not made efficiently.

In particular, when the expanded synthetic resin (for example, expanded polyurethane, etc.) is used as the porous media (13) and (33), since the porosity is very high, 95 to 96%, microorganisms can easily penetrate into the carrier, and inside the carrier. Oxidizing pollutants (organic matter, ammonia nitrogen, etc.) and dissolved oxygen can be effectively delivered to the microorganisms immobilized on it, and backwashing for periodic removal of filtrates and proliferating microorganisms can be performed efficiently with low power. It has one characteristic.

The farm 2 is made of a land water tank, and the discharge water 3 is forcibly supplied to the first biofilm filtration tank 10 by a pump 6.

The aquaculture farm 2 is connected to the drain pipe 4 for discharging the discharge water (3). The drain pipe 4 is provided with a valve.

The upper portion of the first biofilm filtration tank 10 and the upper portion of the ozone reaction tank 20 are connected to each other through a first connecting tube 91, and the lower portion of the ozone reaction tank 20 and the second biofilm filtration tank 10. The upper portion of the second connecting tube 92 is connected to each other, the lower portion of the second biofilm filtration tank 30 and the lower portion of the ozone degassing tank 40 is connected through a third connecting tube (93).

The upper part of the ozone degassing tank 40 is connected to the recycle tube 98 for recycling the filtered water back to the farm (2).

Although not shown in the drawings, a recirculation tube 98 may be provided in the ozone reaction tank 20, the second biofilm filtration tank 30, and the like, if necessary.

The first connecting pipe 91, the second connecting pipe 92, the third connecting pipe 93, the recirculation pipe 98 and the like are provided with a valve for controlling the flow rate and opening and closing the pipe as necessary. .

In the first biofilm filtration tank 10, a dispersion plate 12 is installed to support the porous filter medium 13 at a predetermined height so as not to be lost to the outside when the porous filter medium 13 having a specific gravity is floated.

A plurality of holes 11 are drilled in the dispersion plate 12.

In the first biofilm filtration tank 10, the microorganisms remove ammonia nitrogen such as ammonium chloride (NH 4 Cl) by fixing and injecting microorganisms (for example, nitrided microorganisms) into the porous filter 13.

In the first biofilm filtration tank (10), particulate suspended solids (SS) and soluble organic pollutants due to the remaining aquaculture feed and fish waste, which are the main water pollutants contained in the aquaculture discharge water (3) by the porous filter (13) , Inorganic contaminants, etc. are effectively filtered.

That is, in the first biofilm filtration tank 10, filtration by physical filtration and biological reaction is simultaneously performed.

The ozone reaction tank 20 is provided with an ozone nozzle 62 connected to the ozone generator 60 through an ozone tube 64 at the bottom thereof.

The ozone nozzle 62 disperses and discharges ozone (which may include some air) from the ozone generator 60 into fine bubbles, so that ozone and effluent water are increased to increase the oxidation reaction and sterilization effect by ozone. Evenly contact

As described above, by installing the ozone nozzle 62 in the lower portion of the ozone reaction tank 20 to supply oxygen and ozone, the ozone reaction tank 20 dissolves oxygen in water that has passed through the first biofilm filtration tank 10. Control, sterilization, and direct removal of dissolved ammonia nitrogen in water.

That is, the ozone reaction tank 20 oxidizes bromine (Br) ions contained in natural seawater with ozone to catalyze dissolved substances such as organic and inorganic materials that are not removed in the first biofilm filtration tank 10. Removal is performed by chemical oxidation, and sterilization is performed on red tide bacteria and pathogenic microorganisms contained in the effluent.

In the second biofilm filtration tank 30, similar to the first biofilm filtration tank 10, the ammonia nitrogen in the water may be further removed, biologically nitrified, and denitrified by the porous filter 33. Removal is done.

The second biofilm filtration tank 30 has an aeration pipe 36 installed therein so that an indirect aeration is made, and an aeration connected to the air supply device 70 through an air pipe 74 at the bottom where the aeration pipe 36 is installed. The nozzle 72 is installed.

The second biofilm filtration tank 30 has a plurality of holes perforated dispersion plate 32, 34 so that the porous filter 33 is smoothly introduced into the upper and lower portions of the second biofilm filter 33 without being lost to the outside. Install it.

The upper end of the width pipe 36 is installed to be located above the upper distribution plate 32 is configured to minimize damage or breakage of the porous media 33 by the shear stress of the influent and bubbles.

The lower portion of the pipe 36 is preferably formed in a funnel shape (conical shape) in order to facilitate the flow of air and water ejected from the aeration nozzle (72).

As described above, the air blown out of the aeration nozzle 72 through the aeration pipe 36 is led to and supplied to the upper portion of the second biofilm filtration tank 30, so that the downstream flow in the second biofilm filtration tank 30 is reduced. Is done.

In the second biofilm filtration tank 30, as the downflow occurs, the porous filter 33 is maintained in a deposited state, thereby further removing residual suspended matter and remaining dissolved organic matter, biological nitriding, and denitrification. The removal of is done effectively.

In the ozone degassing tank 40, an aeration nozzle 72 connected to the air supply device 70 through an air pipe 74 is installed at the lower portion.

The aeration nozzle 72 is made to eject the compressed air supplied in a fine bubble state.

In the ozone degassing tank 40, degassing of residual ozone and supply of dissolved oxygen (DO) are performed by the fine air ejected from the aeration nozzle 72.

When ozone oxides (e.g. bromate, aldehyde, carboxylic acid, etc.) generated in the process of the above-mentioned treatment and low molecular weight by the reaction with ozone are accumulated in the water recycled to the farm 2, Since it may cause growth inhibition and poisoning, etc. of fish, it is necessary to remove it, and in the ozone degassing tank 40, such degassing of the remaining ozone is performed.

A dispersion plate 42 is installed at the lower portion of the ozone degassing vessel 40, and a recirculation tube 98 is connected at the upper portion of the ozone degassing vessel 40 to supply the filtered water back to the farm 2. do.

As shown in FIG. 4, the ozone degassing tank 40 may be composed of an activated carbon filtration tank 44 and a pH buffer tank 46.

Activated carbon is installed in the activated carbon filtration tank 44 to remove the ozone oxide generated in the process in which the polymer compound to be treated in the ozone reaction tank 20 becomes low in molecular weight by reaction with ozone.

The pH buffer tank 46 is provided with a buffer buffer, such as coral sand or shell in order to buffer the fall of the pH.

Dispersion plate 42 is installed between the activated carbon filtration tank 44 and the pH buffer tank 46 and the upper portion of the pH buffer tank 46, respectively.

In the above, the application of the wastewater treatment system of aquaculture farms according to the present invention has been described as an example of the application of aquaculture farms to land fish tanks. However, the present invention is not limited thereto, and is applied to a facility for treating wastewater such as a general freshwater farm or aquarium. It is also possible to apply.

And the second embodiment of the wastewater treatment system of the farm according to the present invention is installed integrally in one tank 80, as shown in FIG.

That is, the first biofilm filtration tank 10 and the ozone reactor 20 are partitioned using the first partition 81, and the ozone reactor 20 and the third partition 83 are used by using the second partition 82 and the third partition 83. The two biofilm filtration tanks 30 are divided, and the second biofilm filtration tank 30 and the ozone degassing tank 40 are partitioned using the fourth partition 84.

The second partition 82 and the third partition 83 are connected between the ozone reaction tank 20 and the second biofilm filtration tank 30 so that the lower portion of the ozone reaction tank 20 and the upper portion of the second biofilm filtration tank 30 are connected to each other. A connecting passage 89 is formed between the pairs.

That is, a communication hole 86 is formed in a lower portion of the second partition 82 connected to the ozone reaction tank 20, and a communication hole 86 is connected to the third partition 83 connected to the second biofilm filtration tank 30. A hole 87 is formed, and the second partition 82 and the third partition 83 are provided at predetermined intervals to form a connection passage 89.

The first partition 81 partitioning the first biofilm filtration tank 10 and the ozone reaction tank 20 forms a communication hole 85 thereon, and the water moved upward in the first biofilm filtration tank 10. It is configured to move downward in the ozone reaction tank (20).

The fourth partition 84 partitioning the second biofilm filtration tank 30 and the ozone degassing tank 40 has a communication hole 88 formed at a lower portion thereof, so that water moved downward from the second biofilm filtration tank 30 is formed. The ozone degassing tank 40 is configured to move upward.

Inside the second biofilm filtration tank 30, a width pipe 36 is provided as in the first embodiment.

Also in the above-described second embodiment, the present invention can be implemented in the same configuration as the above-described first embodiment except for the above-described configuration, and thus detailed description thereof will be omitted.

According to the second embodiment configured as described above, the space can be used efficiently, and the configuration is simplified.

And the third embodiment of the wastewater treatment system of aquaculture farm according to the present invention, as shown in Figure 6, in the second embodiment, the ozone reaction tank 20, the second biofilm filtration tank 30 and the ozone degassing tank ( The lower portion of 40) is configured to communicate with each other.

Arrows in FIG. 6 indicate the direction and circulation of water and bubbles.

In addition, the ozone reaction tank 20 and the second biofilm filtration tank 30 are partitioned by only the second partition 82, and communication holes 28 and 29 are respectively formed in the upper and lower portions of the second partition 82. The upper and lower portions of the ozone reaction tank 20 and the second biofilm filtration tank 30 are communicated with each other.

The aeration pipe 74 is not installed in the first biofiltration tank 10 and the second biofilm filtration tank 30, and the aeration nozzle 72 connected to the air supply device 70 at the lower center through the air pipe 74. Install).

In addition, an ozone nozzle 62 connected to the ozone generator 60 through an ozone tube 64 is installed below the ozone reactor 20.

An aeration nozzle 72 connected to the air supply device 70 through an air pipe 74 is installed below the ozone degassing tank 40.

By the above configuration, when the water filtered through the upstream flow in the first biofilm filtration tank 10 flows into the ozone reaction tank 20, the ozone emitted through the ozone nozzle 62 in the ozone reaction tank 20. And since the upward flow is formed by the air, the water introduced into the ozone reaction tank 20 is moved to the second biofilm filtration tank 30 through the communication hole 29 formed in the upper portion of the second partition (82).

The aeration nozzle 72 formed in the lower center of the first biofilm filtration tank 10 and the second biofilm filtration tank 30 is not operated during the operation of the first biofilm filtration tank 10 and the second biofilm filtration tank 30 and is backwashed. Only used for

This is because the water circulation is not smoothly used when the first biofilm filtration tank 10 and the second biofilm filtration tank 30 are in operation.

Secondary filtration is performed while the water moved to the second biofilm filtration tank 30 moves downward along the downward flow of the periphery.

However, since the upflow is made to the ozone reaction tank 20 communicating with the second biofilm filtration tank 30 through the communication hole 28 formed in the lower portion of the second partition 82, the second biofilm filtration tank ( Water moved to the lower portion of 30) flows into the lower portion of the ozone reactor 20 through the communication hole 28 and reacts with the ozone while moving along the upstream.

Also in the ozone degassing tank 40 which is in communication with the second biofilm filtration tank 30 through the communication hole 88 formed in the lower portion of the fourth partition 84, it is ejected from the aeration nozzle 72 provided at the lower portion. Upflow is formed by the fine bubbles.

Therefore, a portion of the water moving along the downstream of the periphery of the second biofilm filtration tank 30 by the flow rate of the water flowing from the first biofilm filtration tank 10 flows into the ozone degassing tank 40 through the communication hole 88. And ozone is degassed as it moves upstream.

Also in the above-described third embodiment, the present invention can be implemented in the same configuration as the above-described first and second embodiments except for the above-described configuration, and thus detailed description thereof will be omitted.

According to the third embodiment configured as described above, the secondary biofilm filtration, the ozone reaction, the ozone degassing, etc. can be performed using the circulation convection of water (FIG. 6) without providing the width pipe 36. Simple and easy to operate and use.

And the fourth embodiment of the wastewater treatment system of the farm according to the present invention is connected to the ozone degassing tank 40, as shown in Figure 7 to further install an activated carbon filtration tank 44 and a pH buffer tank 46 It is also possible.

The ozone degassing tank 40 and the activated carbon filtration tank 44 are connected through a fourth connecting pipe (95).

The recirculation tube 98 is connected to the pH buffer tank 46.

In addition, in order to adjust the temperature of the water passing through the ozone degassing tank 40 and / or the pH buffer tank 46, it is also possible to further install the heat exchange tank (50).

The pH buffer tank 46 and the heat exchange tank 50 is connected to each other through a fifth connecting pipe (96).

The heat exchange tank 50 is connected to the recirculation pipe 99 for supplying the water adjusted to a temperature suitable for the growth of the fish to the farm (2).

The heat exchange tank 50 is provided with a cooler for cooling the temperature of the water and / or a heater for raising the temperature of the water.

Since the cooler and the heater can be generally applied to various apparatuses and facilities used for heating and cooling, detailed description thereof will be omitted.

When the heat exchange tank 50 is installed in the middle of the recirculation tube 98 of the first to third embodiments described above, the temperature of the water supplied to the aquaculture farm 2 is maintained at an optimal state for the growth of fish. It is more preferable because it can be done.

Also in the above-described fourth embodiment, the present invention can be implemented in the same configuration as the above-described first to third embodiments except for the above-described configuration, and thus a detailed description thereof will be omitted.

In the above description of the preferred embodiment of the wastewater treatment system of aquaculture farm according to the present invention, the present invention is not limited to this, but the present invention is not limited to the claims and the detailed description of the invention and various modifications are carried out within the scope of the accompanying drawings. It is possible and this also belongs to the scope of the present invention.

According to the effluent treatment system of the farm according to the present invention made as described above, the system for treating and circulating the effluent from the land fish tank marine fish farm is economical, efficient and stable.

According to the wastewater treatment system of the farm according to the present invention, it is possible to stably and effectively remove marine pollutants by biofilm filtration and ozone denitrification using bromine catalyst reaction by ozone.

In addition, according to the effluent treatment system of the farm according to the present invention, since the first biofilm filtration tank performs the filtration treatment in an upstream flow, and the second biofilm filtration tank performs the filtration treatment in a downstream flow using an indirect aeration, the filtration efficiency is increased and remaining Clear removal of suspended solids and dissolved container materials and removal of ammonia nitrogen in water is achieved.

In addition, according to the wastewater treatment system of the farm according to the present invention, it is possible to remove the by-products generated by the reaction with ozone in the ozone degassing tank, it is possible to safely recycle and reuse the filtered water is completed.

According to the wastewater treatment system of the farm according to the present invention, since it is possible to perform a simple structure with a single tank, it is possible to use the installation space efficiently, reducing the installation cost.

Claims (13)

A first biofilm filtration tank in which the discharged water discharged from the aquaculture farm enters the lower part and moves upwards, and a porous media is installed therein; An ozone reaction tank in which water passing through the first biofilm filtration tank flows upwardly and moves downward, and oxygen and ozone are injected; A second biofilm filtration tank in which water passing through the ozone reaction tank is introduced into the upper portion and moved downward by indirect aeration, and a porous filter is installed therein; And a ozone degassing tank in which water passing through the second biofilm filtration tank flows downward to move upward and aeration of air. The method according to claim 1, The upper portion of the first biofilm filtration tank and the upper portion of the ozone reaction tank are connected to each other through a first connecting pipe, The lower portion of the ozone reaction tank and the upper portion of the second biofilm filtration tank are connected to each other through a second connecting pipe, And a lower portion of the second biofilm filtration tank and a lower portion of the ozone degassing tank are connected to each other through a third connecting pipe. The method according to claim 1, The first biofilm filtration tank, the ozone reaction tank, the second biofilm filtration tank, the ozone degassing tank are integrally installed in one tank, The first biofilm filtration tank and the ozone reaction tank are partitioned using a first partition having a communication hole formed thereon. The ozone reaction tank and the second biofilm filtration tank are partitioned using a second partition and a third partition, The second biofilm filtration tank and the ozone degassing tank are partitioned using a fourth partition having a communication hole formed at a lower portion thereof. A communication hole is formed in a lower portion of the second partition connected to the ozone reactor, A communication hole is formed in an upper portion of the third partition connected to the second biofilm filtration tank. The second partition and the third partition is discharged water treatment system of aquaculture farms are installed at predetermined intervals to form a connection passage. The method according to claim 1, The first biofilm filtration tank, the ozone reaction tank, the second biofilm filtration tank, the ozone degassing tank are integrally installed in one tank, The first biofilm filtration tank and the ozone reaction tank are partitioned using a first partition having a communication hole formed thereon. The ozone reaction tank and the second biofilm filtration tank are partitioned using a second partition having communication holes formed in upper and lower portions thereof. And the second biofilm filtration tank and the ozone degassing tank are partitioned using a fourth partition having a communication hole formed at a lower portion thereof. The method according to any one of claims 1 to 4, Discharge water treatment system of aquaculture farms to install aeration nozzles connected to the air supply in the center of the bottom of the first biofilm filtration tank and the second biofilm filtration tank. The method according to claim 5, The first biofilm filtration tank, the ozone reaction tank, the second biofilm filtration tank, the ozone degassing tank is installed in the discharge water treatment system of aquaculture farms having a plurality of holes perforated in the upper or lower portion. The method according to claim 6, In the center of the inside of the second biofilm filtration tank is installed an aeration pipe in which the aeration nozzle is located on the floor to indirect aeration, The upper end of the width pipe is installed to be located above the distribution plate installed on the upper portion of the second biofilm filtration tank, And a lower portion of the aeration pipe is formed in a funnel shape to smoothly flow air and water ejected from the aeration nozzle. The method according to any one of claims 1 to 4, The porous filter medium installed in the first biofilm filtration tank and the second biofilm filtration tank is made of a material having a porosity of 50% or more, and manufactured and used to have a particle size of 2 to 20 mm. The method according to claim 8, Effluent treatment system of aquaculture farm using foamed synthetic resin as the porous media. The method according to any one of claims 1 to 4, The ozone reaction tank is discharged water treatment system of aquaculture farm to install an ozone nozzle connected to the ozone generator in the lower portion. The method according to any one of claims 1 to 4, The ozone degassing tank is discharged water treatment system of aquaculture farms installed in the lower portion of the aeration nozzle connected to the air supply. The method according to any one of claims 1 to 4, The ozone degassing tank is an activated carbon filtration tank in which activated carbon is installed and a pH buffer tank in which a pH buffer consisting of coral sand or shells is installed. The method according to any one of claims 1 to 4, The ozone degassing tank is a wastewater treatment system of the farm is connected to a heat exchange tank for adjusting the filtered water to a temperature suitable for the growth of fish farmed in the farm.

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