KR100254136B1 - Closed recirculating filter system for sea fish culturing facility using bio-submerged filtration and ozone denitrification - Google Patents

Abstract

PURPOSE: A circulation filtration system of land water tank-type marine fish cultivation facility by biofilm filtration and ozone denitrification is provided, which uses economical, effective and stabilized biofilm filtration and uses ozonizing bromine catalyst for oxidizing organic matter, denitrifying ammonia nitrogen and sterilizing red tide bacteria and pathogenic marine microorganism, so that the system can increase the productivity and cope with any marine accidents such as red tide. CONSTITUTION: The system comprises the followings: (i) a cultivation tank(10) for collecting sea water and for cultivating marine fish; (ii) a biofilm filtration tank(20) that is connected to the cultivation tank(10), in which filtration media(22) for filtering suspended matter and dissolved organic matter; (iii) an ozone contact tank(30) that is connected to biofilm filtration tank(20) and to ozone generator(70), in which a part of sea water coming from biofilm filtration tank(20) and ozone are contacted for oxidizing and removing organic and inorganic matters, for denitrifying ammonia nitrogen by bromine catalyst and for sterilizing red tide bacteria and pathogenic marine microorganism; (iv) an aeration tank(40) that is connected to ozone contact tank(30) and to an air force feeder(60) in which sea water that is contacted to ozone is aerated by air that is force fed from air force feeder(60); (v) an activated carbon filtration and pH buffer tank(50) in which activated carbon(52) for removing harmful matter and pH buffering agent(53) are charged; and (vi) an air force feeder(60) for feeding air to the biofilm filtration tank(20), the aeration tank(40) and the activated carbon filtration and pH buffer tank(50).

Description

Circulation Filtration System of Marine Aquatic Fish Farming Facilities by Biofilm Filtration and Ozone Denitrification

The present invention relates to a circulating filtration system of aquaculture tank marine fish farming facility by biofilm filtration and ozone denitrification. More specifically, aquaculture tanks for farming marine fish; A biofilm filtration tank installed in contact with the aquaculture tank and accommodating biofilm filtration materials for filtering suspended substances and dissolved organic substances therein; An ozone contact tank installed in contact with the biofilm filtration tank and contacting ozone with circulating water installed in contact with the ozone generator; An aeration tank installed to be in contact with the ozone contact tank and aerated to circulate water installed in contact with the air compressor; Activated carbon filtration and pH buffering tanks installed in contact with the aeration tank and having activated carbon and pH buffering materials therein and installed in contact with the aquaculture tanks; And an air compressor installed in contact with the biofilm filtration tank, aeration tank, activated carbon filtration and pH buffer tank to pressurize air, and directly denitrify ammonia nitrogen in water by catalytic reaction by bromine ion in natural seawater and injection ozone. Toxic damage to farmed fish can be controlled, biofilm filtration can remove residual feed and solid wastes physically and biologically and economically, and environmental changes in coastal areas such as pollution and aging of coastal fisheries Of marine fish farming facilities with safe effects to prevent a variety of diseases and to increase aquaculture productivity without affecting marine pollution such as red tide phenomena in coastal waters and to cope with pollution damage such as red tide. It relates to a circulating filtration system.

To date, in marine aquarium farming facilities that produce some marine fish, the circulating filtration system, which is mainly used based on empirical results, removes suspended solids and organic contaminants and dissolves nutrients in water by physical and biological filtration. The facility is being operated for the purpose of removing a very small portion of the ozone, and the ozone injection method is only partially empirically operated for the purpose of preventing fish diseases caused by bacteria, and the direct removal of ammonia nitrogen by ozone disclosed in the present invention. Seawater purification technology using denitrification has not been introduced at home and abroad.

Therefore, these filtration facilities have extremely poor filtration efficiency, excessive filter paper facility volume due to low filtration rate and the resulting economic loss, and cannot apply the efficient exclusion technique of the filtered material, and nitrates (especially ammonia) Toxic damage due to the accumulation of nitrogen) appears, and there is a problem in that it is incapable of coping with sudden damage in the case of coastal seawater pollution accidents such as red tide, and the combination of empirical facilities prevents the comprehensive management system or automation of all facilities.

Therefore, the present inventors have high filtration efficiency even at high filtration speed in order to solve the above technical problems economically and efficiently, and since the specific gravity of the biofilm filter is lighter than water, the present invention is backwashed with only a small amount of air injection. It can be removed by the process, so that stable system operation is possible, and ammonia nitrogen, a toxic ingredient that is fatal to aquaculture seafood, can be completely decomposed by ozone denitrification in a short time, and additionally, harmful bacteria can be effectively removed by injecting ozone. This system was developed to be able to cope with sudden accidents such as red tide by sterilization, and to enable comprehensive automatic management system by combining and simplifying each unit process.

That is, the present invention prevents the disease of aquaculture fish, removes various pollutants or toxic substances generated in aquaculture farms, sterilizes harmful marine microorganisms, purifies the water quality of cultured seawater, and also improves the productivity of aquaculture, etc. It is an aim to provide an efficient and safe circulation filtering system for marine fish farming facilities that can prevent accidental damage caused by pollution.

1 is a schematic configuration diagram of a circulating filtration system according to the present invention.

* Explanation of symbols for main parts of the drawings

10: Aquaculture tank 12: Transportation means

20: biofilm filter tank 22: biofilm filter material

30: morning contact 32: dispersion device

40: aeration tank 42: dispersion device

50: activated carbon filtration, pH buffer 52: activated carbon

53: pH buffer 60: air compressor

70: ozone generator 80: residual ozone remover

P1 ~ P8: Pipes 1 to 8 V: Switching means

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The circulating filtration system of the above-mentioned land tank marine fish farming facility according to the present invention includes a tank-shaped farming tank formed to a predetermined size so as to store seawater to farm marine fish; It is installed to be in contact with the aquaculture tank to accommodate the filtered seawater discharged and discharged from the aquaculture tank and suspended matter and dissolved organic substances contained in the seawater, and to wash the filtered material attached to the filter medium A cylindrical biofilm filtration tank for introducing pressurized air into the inside; It is installed in contact with the biofilm filtration tank to accommodate a portion of the seawater that is transported through the biofilm filtration tank, oxidizes organic and inorganic substances in the seawater, and in particular, ammonia is toxic in the seawater, which is a toxic component that is fatal to farmed fish. A tubular ozone contact tank which directly denitrifies and removes nitrogen by a bromine catalyst reaction using ozone, and supplies ozone to the inside of the ozone generator to sterilize red algal bacteria and pathogenic marine microorganisms in seawater; It is formed in the same tubular shape as the ozone contact tank to be in contact with each other, accommodates the seawater being pumped through the ozone contact tank, and aeration of the seawater by the pressurized air introduced therein to remove ozone remaining in the seawater and dissolve oxygen. An aeration tank for increasing the concentration; Activated charcoal, which is installed in contact with each other in the same tubular shape as the aeration tank and is transported through the aeration tank, serves to remove harmful by-products generated by the reaction with ozone in the previous step, and pH of the treated seawater is lowered. Each of the pH buffers can be buffered, and the remaining ozone that has not been removed is completely removed by pressurized air introduced therein, and the purified seawater is activated carbon filtration / pH buffer tank for flowing the inside of the culture tank. ; And an air compressor installed in contact with the biofilm filtration tank, the aeration tank, the activated carbon filtration and the pH buffer tank to supply pressurized air.

In the circulating filtration system of the aquaculture facility, the aquaculture tank and the biofilm filtration tank are connected through the first pipe, the biofilm filtration tank and the ozone contact tank are connected through the second pipe, and the ozone contacting tank and the aeration tank are connected to the third. It is contacted through the pipe, and the aeration tank and the activated carbon filtration and pH buffer tank are connected through the fourth pipe, and between the activated carbon filtration, the pH buffer tank and the culture tank is connected through the fifth pipe. The aeration tank, activated carbon filtration and pH buffer tanks are communicated through the sixth tube, and the ozone generator and the ozone contact tank are communicated through the seventh tube so that the seawater in the aquaculture facility is circulated.

The important aspect in the marine fish cultured water filtration system according to the present invention as described above is to prevent diseases of fish and various contaminants generated in the marine fish farms by primary biofilm filtration and biological oxidation of microorganisms. And secondly, it is in terms of water purification of aquaculture seawater that removes ammonia nitrogen as well as sterilizing effect of seawater using ozone. In addition, the present invention provides an efficient and safe high-tech marine fish circulating treatment system that can not be subjected to unexpected damage caused by coastal pollution such as improvement of aquaculture productivity and red tide.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

Circulation filtration system of aquatic marine fish farming facility according to the present invention is a culture tank (10) for accommodating sea water to receive fish; A biofilm filtration tank 20 installed in contact with the culture tank 10 and having a filter medium 22 for filtering suspended substances and dissolved organic substances therein; The ozone contact is installed in contact with the biofilm filtration tank 20 and in contact with the ozone generator 70 to contact a portion of the seawater conveyed from the biofilm filtration tank 20 with the ozone pumped from the ozone generator 70. Bath 30; The aeration tank 40 is installed to be in contact with the ozone contact tank 30 and is in contact with the air compressor 60 to aeration the seawater pumped from the ozone contact tank 30 with the air being pumped from the air compressor 60. ); It is installed in contact with the aeration tank (40), the inside contains the activated carbon 52 for removing harmful by-products generated in the reaction with ozone and a pH buffer 53 for buffering the pH drop is accommodated, Activated carbon filtration and pH buffer tanks 50 installed in contact with the culture tank 10; And an air compressor (60) installed in contact with the biofilm filtration tank (20), the aeration tank (40), and the activated carbon filtration / pH buffer tank (50).

In the circulating filtration system, the culture tank 10 and the biofilm filtration tank 20 are communicated through the first pipe P1, and the biofilm filtration tank 20 and the ozone contact tank 30 are connected to each other. It is contacted through the pipe (P2), the ozone contact tank 30 and the aeration tank 40 is in contact through the third pipe (P3), the aeration tank 40 and the activated carbon filtration, pH buffer tank (50) ) Is communicated through the fourth pipe (P4), the activated carbon filtration, pH buffer tank 50 and the culture tank (10) is communicated through the fifth pipe (P5), the air compressor (60) ) And the biofilm filtration tank 20, the aeration tank 40, activated carbon filtration, pH buffer tank 50 is in communication through the sixth pipe (P6), between the ozone generator 70 and the ozone contact tank (30) Is communicated through the seventh pipe (P7), and the remaining ozone remover 80 and the ozone contact tank 30 is communicated through the eighth pipe (P8).

The aquaculture tank 10 is a tank-shaped aquaculture tank formed to a predetermined size so as to accommodate and store natural seawater to culture marine fish, and to be in contact with the biofilm filtration tank 20 through the first pipe P1. It is installed to be in contact with the activated carbon filtration and pH buffer tank 50 through the fifth pipe (P5), the contaminated farmed seawater is biofilm through the first pipe (P1) by the pumping means (12), such as a pump It is sent to the filtration tank 20. The seawater treated by passing through the activated carbon filtration and pH buffer tank 50 is received in the culture tank 10 through the fifth pipe (P5).

The biofilm filtration tank 20 is installed in contact with the aquaculture tank 10 through the first pipe (P1), is installed in contact with the air compressor 60, such as an air compressor through the sixth pipe (P6), Contaminated cultured seawater is also accommodated in the condensed cultured seawater, which is pumped from the culture tank 10 through the first pipe (P1) by the pumping means 12, such as a pump installed in the first pipe (P1) inside. It is a cylindrical shape in which the biofilm filter material 22 which filters the suspended particulate matter, dissolved organic substance, etc. contained in the inside is accommodated. The filter medium 22 is not particularly limited, but the particle size 2-5㎜, specific gravity 0.5-0.6, circularity 0.7-0.8, porosity 72-78%, water permeability coefficient 580-600cm / min, specific surface area 9.5-10.5 × 10 Preferred are filter media with physical properties similar to porous plastic media of ³ m ² / m ³ . Filtration and removal of suspended particulate matter and dissolved organic matter in the biofilm filtration tank 20 is performed by up-flow filtration and physical infiltration by porous plastic filter media and attached to the surface of the filter media. It is proliferated to form a biofilm and filtered by biofilm filtration which oxidizes and decomposes organic matter. The material filtered by the up-flow filtration is cleaned by the back-washing by the air injection which is compressed from the air compressor 60 through the sixth pipe P6 at regular intervals. Repeated operation results in low power and efficient filtration.

The ozone contact tank 30 is installed in contact with the biofilm filtration tank 20 through the second pipe (P2), is installed in contact with the ozone generator 70 through the seventh pipe (P7), the second A tube configured to receive a portion of the filtered seawater fed from the biofilm filtration tank 20 through the pipe P2 and to receive ozone from the ozone generator 70 through the seventh pipe P7. Shape. In the ozone contact tank 30, an organic-inorganic substance in seawater that is not removed by the biofilm filtration tank 20 is oxidized with ozone that is compressed from the ozone generator 70 using bromine ions in natural seawater as a catalyst. Oxidation of various dissolved organic substances and chemical oxidation of nitrogen-based dissolved inorganic substances, including ammonia nitrogen, as well as sterilizing effects of red tide bacteria and pathogenic marine microorganisms in cultured seawater. The ozone remaining after the reaction as described above is removed by the remaining ozone remover 80 delivered through the eighth pipe on the upper end of the ozone contact tank 30. The ozone generator 70 is provided with a pressure feeding means such as a compressor so that the ozone can be pumped into the ozone contact tank 30. In addition, at the bottom of the ozone contact tank, a dispersing device 32 is installed to disperse inflowing ozone into fine air droplets, so that the ozone and sea water can be easily contacted with each other to further improve the oxidation reaction and sterilization effect by ozone. Will be.

The aeration tank 40 is installed in contact with the ozone contact tank 30 through the third pipe (P3) and is installed in contact with the air compressor (60) through the sixth pipe (P6), the ozone inside It is a tubular shape which accommodates the seawater pumped from the contact tank 30 and the air pumped from the air compressor 60. The aeration tank 40 accommodates the air being pushed from the air compressor 60 to aeration seawater to remove residual ozone not completely removed from the ozone contact tank 30 by fine air and to increase dissolved oxygen concentration. do. In addition, at the lower end of the aeration tank, a dispersing device 42 for distributing the introduced air into the fine air bubbles is installed, and the aeration is made more efficiently.

The activated carbon filtration and pH buffer tank 50 is installed in contact with the aeration tank 40 through the fourth pipe (P4) and installed in contact with the air compressor (60) through the sixth pipe (P6), the inside In the fourth pipe (P4) accommodates the seawater being pushed from the aeration tank 40, and the pH buffer 53 for recharging the activated carbon 52 and the pH drop to remove harmful by-products is accommodated have. Activated carbon filtration and pH buffer tank (50) by-products such as bromate, aldehyde, carboxylic acid produced in the process of the low molecular weight of the polymer compound to be treated in the ozone contact tank 30 by reaction with ozone Accumulation in circulating water may cause growth disorders or poisoning of cultured fishes. Therefore, these harmful by-products are removed by activated carbon 52 and buffered by the pH buffer 53 such as coral sand or shells. do. In addition, the activated carbon filtration and pH buffer tank 50 is installed in contact with the culture tank 10 through the fifth tube (P5), through the biofilm filtration tank 20 to the activated carbon filtration, pH buffer tank (50). The treated and purified seawater is introduced into the culture tank 10 through the fifth pipe P5.

In addition, each tube of the circulating filtration system, that is, the first tube to the eighth tube is provided with an opening and closing means such as a valve to open and close each tube as necessary.

As described above, the circulating filtration system of the marine fish farming facility in the land tank according to the present invention is an economical, efficient and stable biofilm filtration method and the productivity of the marine fish farming facility by ozone denitrification using bromine catalyst reaction by ozone. It is a very effective invention that can ensure the improvement and stability, actively cope with marine pollution accidents such as red tide, and improve the international competitiveness of facilities and technology by developing advanced aquaculture technology.

Claims (2)

In the circulation filtration system for fish farming using sea water, A tank-shaped aquaculture tank formed in a predetermined size to store seawater; It is installed in contact with the aquaculture tank, and the seawater that is pumped from the aquaculture tank, and the specific gravity for filtering the suspended matter and dissolved organic substances contained in the seawater is less than 1 and the porous plastic biofilm filter material, respectively, and the pressure for washing the filter medium A cylindrical biofilm filtration tank for introducing air therein; It is formed in the same tubular shape as the biofilm filtration tank and installed in contact with each other to receive a portion of seawater that is transported through the biofilm filtration tank, and oxidizes and removes organic and inorganic contaminants in the seawater by ozone supplied from an ozone generator. In particular, ozone contact tank for directly denitrifying and removing ammonia nitrogen in aquaculture seawater by the bromine catalyst reaction, and sterilizing red algae bacteria and pathogenic marine microorganisms in seawater; It is installed to be in contact with each other in the same tubular shape as the ozone contact to accommodate the sea water being pushed through the ozone contact tank, and aeration of the sea water by the pressurized air introduced therein to remove residual ozone and increase the dissolved oxygen concentration. Aeration tank for; It is installed in contact with each other in the same tubular shape as the aeration tank and accommodates the activated seawater and pH buffer material for removal of harmful substances remaining in the seawater, and is transported through the aeration tank, respectively, and retains residual ozone by pressurized air introduced into the tank. Activated carbon filtration · pH buffer tank for completely removing and purifying seawater to flow into the aquaculture tank; And It is installed in contact with the biofilm filtration tank, aeration tank, activated carbon filtration, pH buffer tank and comprises an air compressor for supplying pressurized air, A dispersing device for dispersing ozone and pressurized air is installed at the lower end of the ozone contacting tank and the aeration tank, the pH buffer material is made of coral sand or shell, and the ozone contacting tank remains to remove ozone remaining in seawater. A circulating filtration system for terrestrial water marine fish farming facility, characterized in that an ozone eliminator is installed. The biofilm filter according to claim 1, wherein the biofilm filter material has a particle size of 2-5 mm, specific gravity of 0.5-0.6, circularity of 0.7-0.8, porosity of 72-78%, permeability coefficient of 580-600 cm / min, specific surface area of 9.5-10.5 × 10 ³ m Circulation filtration system of aquatic marine seafood farming facility characterized by a biofilm filtration material with physical properties similar to that of ² / m ³ porous plastic media.

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