KR102037631B1 - Removal apparatus of dissolved carbon dioxide(CO2) and organic matter in a decompression chamber. - Google Patents

Abstract

A degassing apparatus for removing carbon dioxide, and since the degassing apparatus for removing carbon dioxide provides a cycle filtration type culture system having the degassing apparatus for removing carbon dioxide composed of a circulation structure for sending the breeding water from which carbon dioxide is removed to the reservoir, it is possible to have an effect of more effectively removing carbon dioxide (CO_ 2) generated by respiration of breeding organisms and oxygen consumption of biological filtration in a circulating filtration aquaculture system.

Description

Recirculation apparatus of dissolved carbon dioxide (CO2) and organic matter in a decompression chamber.

The present invention relates to a circulating filtration culture system that can reduce the carbon dioxide which is a fundamental cause of the pH drop of the breeding water in the process of circulating the breeding water, the degassing device for removing the carbon dioxide in the breeding water is provided, Circulation filtration culture system equipped with a degassing device for removing carbon dioxide from the rearing water, which removes carbon dioxide from the rearing water, and reduces the carbon dioxide contained in the rearing water through the circulation structure that sends the reared water back to the water tank. It is about.

Currently, marine fish farming production accounts for about 50% of flounder farming. In the case of terrestrial tank farming, it has the advantage of less influence on weather or sea fluctuation than the cage farming.However, since many seawater is collected from the sea and used, it is drained, so stable breeding is caused by deterioration of natural environment such as red tide and cold water generation. It may be difficult.

In addition, due to poor energy efficiency in power, heating and cooling costs, it is an obstacle to raising farming costs and diversifying aquaculture varieties. Fish excretion and uningested feeds generated during farming contain high levels of nutrients. There is a need for treatment accordingly.

Therefore, a circulating filtration aquaculture system has been developed that considers the environmental problem of filtering and reusing the high concentration of nutrient contaminants contained in the breeding water and draining only a part of it.The circulating filtration aquaculture system can realize high density breeding using a small amount of seawater. By maintaining internal water temperature stably and continuously reprocessing and using water using various water treatment facilities, it is possible to maintain a stable water quality environment and to reduce the amount of water used to minimize the loss of energy and consequently to reduce the discharged water. It is an environmentally friendly, energy-saving aquaculture method.

Conventional circulating aquaculture systems include water supply facilities, such as regular seawater supply pipes and infrastructure, reservoirs used to supply water to farms, filters for outbound water treatment and waste brine treatment facilities. Additional equipment is installed for the treatment of pollutants, such as wastewater treatment plants, drainage facilities such as pipes and infrastructure for the treatment and discharge of large amounts of wastewater to the outside.

In Europe and North America, a circulating filtration system has been developed and distributed in the form of filtration of ammonia to nitric acid with almost no denitrification and pH adjustment as the main process by returning 5 ~ 20% of the bred water to fresh water a day ago. As interest in ecological farming has increased, the field of biofiltration systems using seaweeds, such as seaweed, has become very interested. In Japan, it is mainly complicated by biofiltration system, sediment and suspension pollutant treatment system, gas exchange system, and pH adjustment system, but the daily return volume is less than 1%.

The circulatory filtration system is very globally concerned in terms of environmental protection, but since it is a system for producing fish through artificial environmental control, it must be expensive and have the ability for producers to fully understand and evaluate biological and engineering factors. .

In addition, in terms of operation, high-density-intensive farming costs are associated with cost savings such as the removal of nitrogen wastes such as ammonia, nitrous acid and nitrates, and the removal of solid contaminants, filtration of aquaculture water, and heating and cooling. Since this can be done, it is necessary to install a more efficient water treatment system.

Conventional circulating filtration farming system is a centralized structure that separates the breeding system and the water treatment process, and has a disadvantage in that it cannot quickly cope with changes in water quality due to toxic dissolved substances that may occur during breeding. There is a difficult problem in establishing an environmental composition. In addition, due to problems such as lack of know-how and economic feasibility, major processes such as denitrification are omitted, and about 10% of the daily standard aquaculture water is exchanged. In particular, high density, high density aquaculture processes increase the proportion of carbon dioxide (CO ₂ ) in proportion to the large amount of oxygen consumption activity. The carbon dioxide thus generated is more soluble than oxygen and other gases.

As a result, the hydrogen ion concentration (pH) of the breeding water is lowered, which acts as a factor to lower the growth and survival of the breeding organisms, and the maximum concentration of carbon dioxide (CO ₂ ) when high density breeding (50 kg / ton) is realized in a general circulating filtration system. It is raised to the 50 mg / L level, the general carbon dioxide (CO ₂ ) concentration of natural seawater is 1 ~ 3 mg / L level, which is about 50 times higher than that can cause the death of the livestock.

Korean Patent Publication No. 10-2017-0022051 discloses a circulating filtration aquaculture system, but in the case of the above circulating filtration system, only a small amount of new water of about 5-10% is used as breeding water per day. As a result of high density farming, there was a problem that the pH was continuously decreased, and such a decrease in pH inhibited the metabolism and growth of aquaculture organisms, and the ability of hemoglobin in the blood to bind with oxygen was insufficient to supply sufficient dissolved oxygen. Despite this, breeding organisms can choke. Therefore, it is necessary to develop a circulating filtration aquaculture system equipped with a water treatment system in which carbon dioxide is not excessively accumulated in water.

Korean Patent No. 10-1021911 has a water tank having an overflow pipe; A bioball tank for purifying the seawater discharged to the overflow pipe; A sump tank disposed to store purified seawater discharged to the bioball tank and having a water supply pipe for supplying natural seawater; A circulation line arranged to circulate seawater to the water tank and the sump tank; A filter for sucking seawater of the sump tank with a pump to filter out impurities and to discharge them to a circulation line; A skimmer that sucks the seawater of the sump tank with a pump to filter out impurities and to discharge the sump into the sump tank; A water temperature controller connected to the circulation line to control the cold temperature of the sea water; A sterilizer connected to the circulation line to remove bacteria from the sea water; The sump tank, circulation line, filter, skimmer, water temperature regulator, is disclosed for a display fish tank circulation filtration system including a solenoid valve (V) installed in each connection line of the sterilizer. Korean Patent Laid-Open No. 10-2017-0022051 includes aquaculture tanks that provide a space in which aquaculture organisms work; A sedimentation tank connected with the aquaculture tank to introduce the aquaculture water to precipitate solid contaminants contained in the aquaculture water; A mixing tank connected to the cultured water tank and the settling tank, respectively, into which the cultured water flows; A first sand filter connected to the mixing tank to introduce cultured water and filtering solid contaminants contained in the cultured water; A foam separator connected to the first sand filter to introduce the cultured water and adsorb and discharge the solid contaminants contained in the cultured water; And a degassing apparatus connected to the bubble separator to introduce aquaculture water and decomposing ozone and carbon dioxide dissolved in the culture water. Disclosed is a circulation filtration culture system comprising a. Domestic Patent No. 10-1156215 is provided with a degassing device for removing the carbon dioxide of the breeding water, removes the carbon dioxide of the breeding water introduced from the reservoir, the circulation structure for sending carbon dioxide removed breeding water back to the reservoir Disclosed is a circulating filtration aquaculture system that reduces the carbon dioxide contained in the rearing water to be reused through. Korean Patent No. 10-1782735 is a breeding tank having a polygonal tank bottom surrounded by the outer wall of the tank, the opening is opened; A recycling tank connected to the breeding tank through a drain pipe and collecting breeding water drained from the breeding tank; The regeneration water tank is connected to the degassing apparatus through a regeneration water supply pipe; the regeneration water supply pipe is provided with a regeneration device and a degassing pump; A circulating water recovery pipe is connected to the lower portion of the degassing device and connected to an oxygen supply device; The oxygen supply device is disclosed with respect to the energy-saving circulating filtered fish farming system is provided with a circulating water supply pipe is connected to the breeding tank.

Even in the general farm environment, high density and dense aquaculture processes increase the proportion of carbon dioxide (CO ₂ ) in proportion to the large amount of oxygen consumption. The carbon dioxide thus generated has a higher solubility than oxygen and other gases, thereby lowering the hydrogen ion concentration (pH) of the breeding water, thereby reducing the growth and survival of the breeding organisms. The present invention is a respiratory and biological filtration process of the breeding organisms to solve the above problem that the carbon dioxide removal efficiency is lowered in the degassing apparatus installed in the existing circulating filtration system has a high water solubility, the increase in time and cost for removal It is to provide a circulating filtration aquaculture system equipped with a degassing device for removing carbon dioxide to remove the carbon dioxide (CO ₂ ) generated by the oxygen consumption of the filter medium by inhaling the separated carbon dioxide when passing through the filter medium.

The present invention is a circulating filtration culture system equipped with a degassing device for removing carbon dioxide, a degassing device for removing carbon dioxide, the degassing device for removing carbon dioxide after removing the carbon dioxide of the breeding water introduced from the reservoir, the carbon dioxide is removed the breeding water again It may be made of a circulation structure sent to the reservoir.

In addition, the degassing device for removing carbon dioxide is a filling tower of a sealed structure is empty inside the predetermined size; A breeding water inlet pipe connected to the water storage tank to allow the breeding water to flow into the filling tower; An inflow control valve installed in the breeding water inlet pipe to control the inflow of the breeding water; A filter medium is stacked in the packed column; A breeding water discharge pipe for resupplying the breeding water passing through the filter medium to the water storage tank is installed below the filling tower; An air inlet for supplying air into the packed tower and an air outlet for discharging air supplied through the air inlet to the outside and resupply to the air inlet; Air control valve for adjusting the air injection amount of the air inlet may be made.

The present invention constitutes a sealed packed degassing apparatus for more efficiently removing carbon dioxide (CO ₂ ) generated by respiration of breeding organisms and oxygen consumption during biological filtration in a circulating filtration system. It is designed to artificially inhale and discharge air from the inside to keep the pressure inside the packed column lower than the outside, so that carbon dioxide (CO ₂ ) discharged from the particles of broken breeding water passing through the packed column (filtration plastic). It is a structure that sucks and discharges quickly by using suction force formed inside the device and discharges it to the outside, and its efficiency is very high compared to the general degassing device. By designing a circulating filtration system applying the development technology of the present invention, the related market Can preempt.

1 shows a degassing apparatus of a circulating filtration-type aquaculture system of Korean Patent Application No. 10-1156215, which is filed in advance by an applicant of the present invention.
Figure 2 shows a conceptual diagram of a circulating filtration aquaculture system equipped with a degassing apparatus for removing carbon dioxide of the present invention.
3 shows a degassing apparatus for removing carbon dioxide of the present invention.
4 Solubility by type of gas

1 shows a degassing apparatus of a circulating filtration aquaculture system registered in Korean Patent Application No. 10-1156215 filed by the applicant of the present invention. The degassing apparatus is supplied to the inside of the degassing apparatus through the upper part to supply the storage tank through the medium, the carbon dioxide in the breeding water is separated by the air flowing into the upper part from the lower part when the breeding medium passes through the removal of carbon dioxide Is a possible structure.

However, the pre-registered carbon dioxide (CO ₂ ) degassing apparatus has a limitation in discharging carbon dioxide (CO ₂ ) having high water solubility into the air in the form of injecting breeding water and passing through a medium of a predetermined standard. The present invention has developed a circulating filtration system equipped with a degasser having a high removal rate of carbon dioxide having high water solubility.

Hereinafter, with reference to the accompanying drawings related to the circulating filtration culture system equipped with a degassing apparatus for removing carbon dioxide of the present invention will be described in detail. Figure 2 shows the configuration of a circulating filtration aquaculture system equipped with a degassing device for removing carbon dioxide of the present invention. The present invention is a circulating filtration culture system equipped with a degassing device for removing carbon dioxide is a breeding tank (20), sedimentation tank (30), reservoir (40), pump (50), foam separator (60), biofiltration tank (70), carbon dioxide It may include a degassing device 10 for removal.

Breeding tank 20 is the part where the actual organism is bred, sedimentation tank 30 is the part for removing the solids of the breeding water containing various wastes generated in the breeding process of the organisms supplied from the breeding tank 20 And, the storage tank 40 is a portion in which the breeding water supplied directly from the breeding water or the breeding water tank 20 from which the solids are removed from the settling tank 30 is stored. In addition, the foam separator 60 is a portion for removing the fine organic matter is supplied to the breeding water of the reservoir 40 through the pump 50, the biofiltration tank 70 is left in the breeding water passed through the foam separator 60 Toxic dissolved substances such as ammonia, nitrous acid is the part to be purified, and the purified water thus completed is re-introduced into the breeding tank 20 is reused.

Breeding water tank (20), sedimentation tank (30), reservoir tank (40), pump (50), foam separator (60), biological filtration tank (70) of such a circulation filtration aquaculture system because it is a commonly known configuration In the present invention, a detailed description thereof will be omitted.

The degassing apparatus 10 for removing carbon dioxide of the present invention is installed in a conventional circulating filtration culture system as described above, and after the breeding water is introduced from the sedimentation tank storage tank, carbon dioxide is removed and the breeding water is supplied to the breeding tank again. Breeding water inlet and discharge into the degassing device of the present invention may be made of a pump 50, etc., the apparatus of the present invention is disposed between the reservoir and the foam separator is a part of the breeding water via the pump directly to the foam separator Supplied, and some can be supplied to the degasser.

Degassing apparatus for removing carbon dioxide of the present invention is a packed tower (8) of a closed structure in a hollow form to a certain size; A breeding water inlet pipe (1) connected to the reservoir to allow the breeding water to flow into the filling tower at the top of the filling tower; An inflow control valve (2) installed at the breeding water inflow pipe to control the inflow of the breeding water; A filter medium 7 is stacked in the packed tower; A breeding water discharge pipe 3 is installed below the filling tower so that breeding water having passed through the filter medium can be supplied to a water tank, a foam separator, and a biological filter; An air inlet 4 for supplying air to the inside of the packed tower and an air outlet 6 for discharging air supplied through the air inlet to the outside of the packed tower are formed on one side of the packed tower; It may be made of an air control valve (5) for controlling the air injection and discharge of the air inlet and the air outlet.

3 shows a degassing apparatus for removing carbon dioxide of the present invention. The structure and principle of the apparatus of the present invention will be described with reference to the reference numerals of FIG.

①: Inlet pipe for breeding water supplying high concentration of dissolved carbon dioxide (contaminated breeding water by CO ₂ gas) breeding water caused by the breathing of the breeding organism to the filtering device.

②: It is a valve that controls the quantity of breeding water supplied to the degassing device to maximize the effect by supplying the proper flow rate according to the capacity of the device.

③: Outlet of the breeding water after the degassing process is completed, the most important feature is to produce the S-TRAP type to prevent air from entering the device.

Above ①, ②, ③ are the flow direction of the breeding water and not indicated by the number in the drawing, but the cover part of the upper part is sealed to prevent the air from being ventilated. ⑦ can be spread evenly with the filter media.

④: Air suctioned and discharged using the forced ventilator (blower) installed at the air inlet ⑥ position is supplied into the device only through the inlet of ④.

⑤: As the air intake valve, it is possible to control the amount of air supplied to the inside of the device. Due to this adjustment, the intensity of negative pressure inside the device can be controlled.

⑥: It is the point to discharge the air sucked from inside the device, and it is efficient to install it mainly outside the aquaculture facility, and install a fan and a blower for forced suction / discharge at this point.

The flow in the direction of forced air (intake / exhaust) of air for degassing ④, ⑤, and ⑥ above is characteristic of this process, regardless of the number (number) of inlet and outlet, but the cross-sectional sum of ④ is greater than the sum of the cross-sectional areas of ⑥. It should be small and ④, ⑥ should be located facing each other to facilitate the flow of air.

⑦: The filter media installed inside the degassing apparatus is installed by stacking vertical piles of plastic material with a certain distance in the form of lattice. The breeding water falls vertically, and the degassing action occurs in the process of breaking into the filter media and crashing into the filter media. Occurs.

The filling tower 8 of the present invention has an effect of delivering more oxygen by filling the medium in the column in a packed column so that the water passing through can effectively contact air. The breeding water inlet pipe (1) is connected to the top of the filling tower. Breeding water flowing into the breeding water inlet pipe is connected to the reservoir and used as aquaculture water, and includes the dissolved high concentration of dissolved carbon dioxide caused by the breathing of the breeding organisms.

The breeding water inlet pipe is provided with an inflow control valve (2) to control the flow rate of the breeding water flowing from the reservoir. This is to adjust the capacity of the breeding water flowing into the filter medium to be described later, to maximize the degassing effect according to the proper flow rate supply.

In the packed tower, a filter medium 7 is stacked. In addition, an airtight cover is installed at the top of the filter medium so that air can not be vented. At the bottom of the cover, a spray plate-shaped porous plate may be installed, and the breeding water introduced from the breeding water inlet pipe 1 may be evenly sprayed into the filter medium. The filter medium 7 of the present invention may be formed by stacking one or more in a porous horizontal plate structure. More specifically, the filter medium may be formed of a plastic thin film or net-like plate or square plastic tray structure having micropores formed thereon.

The breeding water entering the upper part of the filter medium passes through the filter medium, and the breeding water particles collide with each other to minimize. At this time, carbon dioxide (CO ₂ ) is separated from the broken breeding water particles, and the breeding molecules are relatively larger than the air molecules. It flows down through the through hole formed in the bottom.

Breeding water discharge pipe (3) is installed below the filling tower. The breeding water discharge pipe is formed in an S-trap structure so that only the collected breeding water is discharged to the outside without injecting air into the filling tower. The carbon dioxide is removed by passing through the medium to move the breeding water collected in the lower portion to the foam separator or resupply to the reservoir.

One side of the filling tower is provided with an air inlet (4) for supplying air into the inside of the filling tower and the air outlet (6) is provided on the side portion facing. The air inlet and the air outlet are provided with a fan and a fan of the fan structure to enable the suction and discharge of air. Air discharged from the air outlet may be supplied to the air inlet or exhaust air to the outside.

The air inlet and the air outlet may be installed in plural numbers, but the air inlet and the air outlet may be installed on the side facing each other so that the flow of air may be made in a certain direction in the packed tower. It is appropriate that the total sum of the cross-sectional areas where the air inlet is formed is smaller than the air outlet, so that the air discharge is larger than the air inlet so that the pressure inside the filling tower is easier to maintain negative pressure than the outside. . In addition, by installing an air control valve (5) on either side of the filling tower it is possible to control the pressure intensity in the filling tower by adjusting the air injection amount more easily and precisely of the air inlet supplied to the inside of the filling tower.

This is because the fine negative pressure is formed inside the packed column of the present invention can maximize the carbon dioxide (CO ₂ ) discharge capacity. The inside of the filling tower in which the air inlet and the air outlet are installed has a structure in which the medium is installed and the air is sealed, and when the carbon dioxide is separated from the breeding water injected into the medium, the air outlet quickly sucks and discharges the carbon dioxide so that the existing and ordinary degassing. The degassing efficiency can be improved compared to the device.

Accordingly, Experimental Example 1 was compared with the conventional degassing efficiency of the carbon dioxide emission of the degassing apparatus according to the present invention.

Experimental Example 1

1. Experiment Method

Table 1 shows the specification and form of the conventional degassing apparatus and carbon dioxide removal degassing apparatus of the present invention installed in the experimental group according to Experimental Example 1 of the present invention.

Conventional circulating filtration system installed in the experimental group as described in FIG. 1, was classified into Comparative Examples 1, 1, and 2 installed with different media. Comparative Example 1 is a degassing apparatus that does not use a medium and Example 1 is a degassing apparatus using a medium in which a net-shaped circular plate made of plastic is laminated vertically, Example 2 is made of a plastic thin film formed with a plurality of micropores In addition, it was installed as a degassing device using a medium in the form of a vertical tube penetrating the center.

Standard and Form of Degassing Apparatus of the Invention and Present Invention division Conventional deaerator Degassing apparatus of the present invention standard Φ300 × H1000 W1500 × L1500 × H1300 Cross-sectional area (㎡) 0.07065 2.25000 Volume (㎥) 0.07065 2.92500 Medium
Type / form Comparative Example 1 Example 1 Example 2 Square plastic tray No medium Circular Net vertical tube Appearance Cylindrical Column (Top Open Type) Rectangular Box (Cube / Sealed) Operating system / ton 7 90 Other Principle of Operation Intake / Exhaust Mode of Operation

After connecting a degassing device equipped with different types of media to a pilot circulating filtration system of about 7 tons installed in the experimental group, the removal rate (%) and daily In order to measure the removal amount of carbon dioxide (kgCO2 / ㎥day) and to more clearly identify the removal characteristics of carbon dioxide for each degassing device, the hydraulic load and air volume / Carbon dioxide removal rate and daily carbon dioxide removal rate of the deaerator were measured based on the breeding quantity ratio.

The degassing apparatus for removing carbon dioxide of the present invention was enlarged to a scale that is practical for industrial application, and its form was also carried out in a circulating filtration system of about 90 tons in order to meet the filtration process of the circulating filtration system. Field application test of the degassing apparatus for carbon dioxide removal of the present invention was installed in the filtration process of the large-scale system in operation, the flow rate of the breeding water was operated at a fixed (1200L / min), the air emissions of the intake exhaust process is 0L / min, The experiment was divided into 25,000L / min, 50,000L / min.

2. Experimental Results

Table 2 below shows the hydraulic load and the air / breeding water ratio of the experimental group degassing apparatus, Table 3 shows the carbon dioxide removal rate (one-pass) and the daily removal amount of the degassing device according to the breeding water flow rate / air flow rate.

Hydraulic load and air volume / breeding ratio of experimental group deaerator division Breeding water flow rate (L / min) 5 10 20 Air flow rate (L / min) 20 1: 4 1: 2 1: 1 80 1:16 1: 8 1: 4 160 1:32 1:16 1: 8

CO2 removal rate (one-pass) and daily removal amount of degassing device according to breeding water flow / air flow in experimental group degassing device medium air
Flow rate (L / min) Breeding water flow rate (L / min) 5 10 20 Removal rate (%) Daily removal amount (kg CO ₂ m ^-3 day ^-1 ) Removal rate (%) Daily removal amount (kg CO ₂ m ^-3 day ^-1 ) Removal rate (%) Daily removal amount (kg CO ₂ m ^-3 day ^-1 ) Comparative Example 1 20 7.8 ± 1.7 0.80 ± 0.11 5.5 ± 0.8 1.06 ± 0.30 7.0 ± 3.9 2.65 ± 0.87 80 9.5 ± 0.6 1.13 ± 0.05 5.7 ± 0.6 1.03 ± 0.20 9.0 ± 1.0 2.25 ± 0.43 160 9.5 ± 0.6 0.10 ± 0.05 4.9 ± 0.1 1.06 ± 0.12 13.2 ± 0.5 2.39 ± 0.22 Example 1 20 13.2 ± 3.4 1.33 ± 0.22 12.9 ± 0.5 2.79 ± 0.11 6.9 ± 0.7 2.92 ± 0.22 80 12.3 ± 0.7 1.26 ± 0.05 17.1 ± 0.6 3.45 ± 0.40 9.8 ± 0.1 3.72 ± 0.10 160 18.3 ± 3.4 2.12 ± 0.22 21.0 ± 3.1 5.31 ± 0.43 13.0 ± 1.8 5.84 ± 0.43 Example  2 20 17.5 ± 0.4 2.06 ± 0.45 19.4 ± 3.6 9.82 ± 1.08 13.4 ± 3.8 6.37 ± 0.30 80 23.6 ± 0.3 2.46 ± 0.50 17.2 ± 0.4 7.43 ± 0.50 16.6 ± 0.7 7.17 ± 0.22 160 21.7 ± 2.0 2.19 ± 0.16 25.8 ± 7.5 10.35 ± 1.52 17.2 ± 4.7 6.64 ± 0.83

Table 4 below shows the hydraulic load and air / air ratio of the degassing apparatus for removing carbon dioxide according to the present invention, and Table 5 shows the results of field application experiments.

Hydraulic load and air / breeding ratio division Breeding water flow rate (L / min) Intake Exhaust System 1200 Air flow rate (L / min) 0 - Inactive 25,000 1:20 1 operation 50,000 1:40 2 operation

Carbon dioxide removal rate (one-pass) and daily removal amount of degassing device according to breeding water flow rate / air flow rate Air flow rate (L / min) Breeding water flow rate (L / min) 1,200 Removal rate (%) CO ₂ removal per daily filter media volume
(kg CO ₂ m ^-3 day ^-1 ) 0 31.8 ± 7.3 5.49 ± 1.60 25,000 46.5 ± 2.9 189.43 ± 1.65 50,000 58.0 ± 3.1 290.73 ± 0.95

As a result of comparing the experimental results, the efficiency of the degassing apparatus according to the present invention was significantly higher in the removal rate (%) per unit volume (㎥) of the filter medium and in the amount removed per day of the filter medium (kg CO ₂ m ^-3 day ^-1 ). As such, the possibility of actual industrial site application is also high.

In general, natural carbon dioxide (CO ₂ ) concentration is 1 ~ 3 mg / L, but in high-density breeding (50 kg / ton) in circulating filtration system, the maximum concentration of carbon dioxide (CO ₂ ) is increased to 50 mg / L level (Fig. 4). However, the device of the present invention constitutes a sealed packed column type degassing device, and is designed to artificially inhale and discharge air from the inside of the device, and is designed to keep the pressure inside the packed column lower than the outside. ).

Using this function, the packed column 內 passes through the filtration media (porous plastic tray) and quickly sucks out carbon dioxide (CO ₂ ) from the particles of broken breeding water to the outside using the suction power formed inside the device. Compared with the general degassing device, the efficiency was very excellent. Researchers its own experiments carbon dioxide (CO ₂₎ reduction one-pass removal efficiency of 30% pH without the supply of aqueous sodium bicarbonate or a basic additive was achieved of 6.6 or higher was maintained for 12 months.

The present invention contributes to the development of the distribution of aquaculture systems equipped with a circulating filtration aquaculture system, and thus helps to reduce environmental pollution as well as high density of aquaculture with a small amount of seawater, which is an advantage of the circulating aquaculture system. There is industrial applicability by promoting the profit generation of fishers in related industries.

10: degassing apparatus for removing carbon dioxide
1: breeding water inlet pipe 2: inflow control valve
3: breeding water discharge pipe 4: air inlet
5: Air control valve 6: Air outlet
7: filtration medium 8: filling tower
20: breeding tank 30: sedimentation tank
40: reservoir 50: pump
60: foam separator 70: biofiltration tank

Claims (3)

A breeding water inlet pipe connected to a storage tank is connected to a storage tank at an upper portion of the packed tower having an empty structure in a predetermined size to introduce breeding water into the filling tower; An inflow amount control valve configured to control the inflow rate of the breeding water in the breeding water inflow pipe;
Inside the filling tower, a filter medium consisting of a plastic thin film or net-like plate or square plastic tray structure having micropores is stacked in a vertical direction, and the feeding water passing through the filter medium is resupplied to the water storage tank under the filling tower. Breeding water discharge pipe is installed;
The breeding water introduced into the breeding water inlet pipe passes through the filtering medium, and when the filtering medium passes, the carbon dioxide in the breeding water is removed by the air supply of the air inlet and the air suction of the air outlet;
One side of the filling tower is formed to face an air inlet for supplying air into the filling tower and an air outlet for discharging the air supplied through the air inlet to the outside and resupplying it to the air inlet, and having a cross-sectional area of the air inlet. The sum is made smaller than the air outlet cross-sectional area;
A circulating filtration-type aquaculture system having a dissolved carbon dioxide removal device using a decompression chamber, characterized in that an air control valve is installed to control the air injection amount of the air inlet.
After removing the carbon dioxide of the breeding water introduced from the reservoir by the dissolved carbon dioxide removal apparatus using the decompression chamber of claim 1, the dissolved carbon dioxide removal using a decompression chamber, characterized in that consisting of a circulation structure for sending carbon dioxide removed breeding water back to the reservoir. Circulating Filtration Systems with Apparatus delete

Images