Circulation filtration system
A seawater electrolysis-based filtration system generates hypochlorous acid to address inefficiencies in existing aquaculture systems, offering an eco-friendly, automated solution for water purification and bacterial control in fish farms and aquariums.
Patent Information
- Application Number
- PCT/KR2025/012207
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-08-23
- Filing Date
- 2025-08-12
- Publication Date
- 2026-02-26
AI Technical Summary
Existing aquaculture filtration systems face challenges with high labor costs, environmental pollution, and inefficiencies due to the use of harmful disinfectants like hydrochloric acid and organic acids, and there is a need for an eco-friendly, automated solution that can effectively manage water quality in fish farms, bathtubs, and aquariums.
A circulating filtration system that generates hypochlorous acid through seawater electrolysis, using an electrolysis module to produce a natural, non-toxic oxidizer that acts as a disinfectant, integrated with a filtration system to purify seawater and control nitrogen cycles, eliminating the need for periodic disinfectant addition.
The system effectively removes microorganisms, bacteria, and ammonia, reduces labor costs, prevents water pollution, and is easily applicable to existing filtration systems, providing a cost-effective and environmentally friendly solution.
Smart Images

Figure KR2025012207_26022026_PF_FP_ABST
Abstract
Description
Circulating filtration system
[0001] The present invention relates to a circulation filtration system, and more particularly, to a circulation filtration system including a tank section for cultivating fish therein, a pump section for sucking a portion of the seawater inside the tank section and moving it outside the tank section, and a filter section for supplying contaminated seawater from the pump section and purifying the contaminated seawater, wherein the filter section includes an electrolysis module for generating hypochlorous acid by electrolyzing seawater as an electrolyte, and wherein the electrolysis module is directly immersed in the water quality control section to generate hypochlorous acid through electrolysis of seawater, and the hypochlorous acid can remove microorganisms and bacteria proliferating in seawater and excrement and ammonia of fish being cultivated.
[0002] The material described in this section merely provides background information on the present invention and does not constitute prior art.
[0003] Hypochlorous acid is a natural, non-toxic oxidizer that kills 99.9% of dangerous pathogens.
[0004] Hypochlorous acid is a powerful bactericidal substance produced by white blood cells or neutrophils that fight infection and disease in our body. It destroys bacteria and any excess combines with organic matter in the body and is chemically converted to water, so it does not cause any harm to the human body.
[0005] In fact, HOCL has a superior sterilizing power than existing sterilizing disinfectants such as ozone water, ethanol, and sodium hypochlorite, and is also notified as a food additive by the Ministry of Food and Drug Safety.
[0006] Furthermore, it is considered to be harmless to the human body as it does not cause skin irritation, breathing problems, or problems if accidentally consumed, and is therefore evaluated as having a high level of safety.
[0007] Meanwhile, in the aquaculture industry, activating agents or illegally using hydrochloric acid (inorganic acid) are used as disinfectants to remove weeds and diseases, including seaweed.
[0008] This type of hydrochloric acid (inorganic acid) is removed by diluting industrial hydrochloric acid with a concentration of 35% or more with seawater, and can have negative effects such as destruction of the marine ecosystem / fishing environment due to plankton death / fish death, increase consumer distrust, and amplify problems in a chain reaction such as a decrease in domestic and international consumption.
[0009] Meanwhile, organic acids are also used as disinfectants. However, like inorganic acids, organic acids require long processing times and additional manpower, increasing processing time and labor costs. Furthermore, many fishermen discard them into the ocean, which leads to significant waste and increases concerns about environmental pollution.
[0010] Meanwhile, scientific research on the effects of active treatment agents on the marine ecosystem is insufficient, and problems such as a shortage of manpower and labor costs due to the high difficulty of active treatment work are also emerging.
[0011] For example, in aquaculture farms, a circulating filtration system is built through a series of processes such as aquaculture tank – physical filtration – UV sterilization – carbon dioxide and nitrogen decomposition – biological filtration – oxygen dissolver.
[0012] In particular, when sterilizing, a disinfectant is added, but there was a problem that workers had to add the disinfectant periodically and manage it.
[0013] In order to solve the problems of the above-mentioned conventional sterilizers and circulating filtration systems, some domestic and foreign related companies have conducted research on methods to produce sterilizers that are harmless to the human body and the environment, or to automate sterilization systems that are easy to manage without human labor. However, the cost of establishing the structure is excessive for actual commercialization, or even if not, the effect is not great compared to the manufacturing cost of the device, so the market competitiveness is low compared to the conventional sterilizers and filtration systems, and there have been no cases of full-scale commercialization.
[0014] Therefore, there is a need to develop a device and method that can solve the problems of the prior art as described above.
[0015]
[0016] The problem to be solved by the present invention is to complement the shortcomings of the above-mentioned prior art, and the purpose of the present invention is as follows.
[0017] First, we aim to provide a circulating filtration system that can be easily applied to existing filtration systems such as fish farms, bathtubs, live fish tanks, and aquariums.
[0018] Second, we aim to provide an eco-friendly circulating filtration system by generating HOCL, a natural non-toxic oxidizer, through electrolysis using seawater as an electrolyte and using this as a sterilizing agent.
[0019] Third, we aim to provide a circulating filtration system that can prevent water pollution by controlling the nitrogen cycle.
[0020] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.
[0021] According to the present invention, the apparatus may include a tank section for cultivating fish inside a storage space for loading seawater, a pump section for sucking up some of the seawater inside the tank section and moving it outside the tank section, and a filter section for supplying contaminated seawater from the pump section and purifying the contaminated seawater.
[0022] At this time, the filtering unit may include a filter unit that physically filters foreign substances in seawater, a sterilizing unit that sterilizes seawater by irradiating ultraviolet rays, a treatment unit that removes carbon dioxide and introduces nitrogen into seawater, and a water quality control unit that chemically removes organic substances and ammonia in seawater.
[0023] In addition, the seawater purified by the filter unit, the sterilizing unit, the treatment unit, and the water quality control unit is resupplied to the water tank unit, and the water quality control unit includes an electrolysis module that generates hypochlorous acid by electrolyzing seawater as an electrolyte, and the electrolysis module is directly immersed in the water quality control unit to generate hypochlorous acid through electrolysis of seawater, and the hypochlorous acid can remove microorganisms and bacteria proliferating in the seawater and remove excrement and ammonia of fish being farmed.
[0024] Furthermore, the electrolysis module can be operated for 5 to 10 minutes per hour to produce hypochlorous acid.
[0025] In addition, the above tank section is configured such that multiple different tank sections are connected to circulate seawater, and the filter section can integrate and purify seawater from multiple tank sections.
[0026] Additional solutions of the present invention will be described in part in the description that follows below, and may be readily ascertained in part from the description, or may be acquired by practicing the present invention.
[0027] Both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
[0028] The effects of the present invention configured as described above are as follows.
[0029] First, it can be easily applied to filtration systems such as conventional fish farms, bathtubs, live fish tanks, and aquariums.
[0030] Second, by electrolyzing seawater as an electrolyte, HOCL, a natural, non-toxic oxidizer, is generated, which is used as a disinfectant, making it environmentally friendly.
[0031] Third, water pollution can be prevented by controlling the nitrogen cycle.
[0032] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.
[0033] Figures 1 and 2 are conceptual diagrams of a circulating filtration system according to one embodiment of the present invention.
[0034]
[0035] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the attached drawings.
[0036] However, when describing a specific embodiment of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description is omitted.
[0037] The above-described objects, features, and advantages of the present invention will become more apparent through the following detailed description taken in conjunction with the accompanying drawings. However, the present invention is susceptible to various modifications and various embodiments. Therefore, specific embodiments will be illustrated in the drawings and described in detail below.
[0038] If a detailed description of a known function or configuration related to the present invention is deemed to unnecessarily obscure the gist of the present invention, such detailed description will be omitted. Furthermore, the numbers used in the description of this specification are merely identifiers used to distinguish one component from another.
[0039] Additionally, the suffix "부" for components used in the following description is merely used or mixed to facilitate the writing of the specification, and does not have a distinct meaning or role in itself.
[0040] Figures 1 and 2 are conceptual diagrams of a circulating filtration system according to one embodiment of the present invention.
[0041] In large-scale fish farms, separate filtration systems are installed to prevent and remove fish waste, microbial growth, and bacterial growth over time.
[0042] For example, in aquaculture farms, a circulating filtration system is built through a series of processes such as aquaculture tank – physical filtration – UV sterilization – carbon dioxide and nitrogen decomposition – biological filtration – oxygen dissolver.
[0043] In conventional biological filtration systems, disinfectants, etc. must be added periodically.
[0044] Therefore, in the conventional circulation filtration system, labor is invested in maintenance and repairs, and management costs increase due to periodic supply of disinfectants.
[0045] The present invention is based on the principle of enabling self-supply of a disinfectant within seawater to be purified by adding an electrolysis device to a circulation filtration system.
[0046] As illustrated in Figure 1, the circulation filtration system according to the present invention can be directly applied to a filtration system additionally installed in a conventional fish farm, fish tank, etc.
[0047] Likewise, as illustrated in FIG. 2, the circulation filtration system of the present invention can be directly applied to a filtration system of a large-scale aquaculture farm in which multiple tanks are connected in parallel or in series.
[0048] The circulation filtration system of the present invention can be applied simply and easily by installing an electrolysis module in a biological filtration unit that removes organic matter and ammonia.
[0049] In conventional biological filtration units, disinfectants, etc. must be periodically added, but in the circulating filtration system of the present invention, hypochlorous acid obtained by electrolyzing seawater with an electrolysis module is used as the disinfectant, so there is no need to add a separate disinfectant, and it can be supplied by the seawater that is the target of filtration.
[0050] The concentration of hypochlorous acid must be maintained at a certain level to function as a disinfectant. Therefore, a sensor unit capable of measuring data on the seawater atmosphere (acidity, dissolved oxygen, ammonia, temperature) of the tank is included, and based on the data measured by the sensor unit, whether or not the electrolysis module is operated can be determined, thereby controlling the concentration of hypochlorous acid in the tank.
[0051] Meanwhile, to describe hypochlorous acid in more detail, the disinfectant injected into aquaculture farms, etc., is a substance that has a harmful effect on the human body, like hydrochloric acid, and thus many safety issues have arisen.
[0052] In contrast, hypochlorous acid is a powerful bactericidal substance produced by white blood cells or neutrophils in our body that fight infections and diseases. It destroys bacteria and any excess combines with organic matter in the body and is chemically converted to water, so it does not cause any harm to the human body.
[0053] More specifically, when hypochlorous acid is used as a disinfectant, it can remove more than 80-90% of ammonia (block the source of bacterial growth) and control the growth of Vibrio bacteria, white spot syndrome, and general bacterial growth and decrease.
[0054] Furthermore, hypochlorous acid has the advantage of being able to break down the mucus (mainly protein component) of fish, and is consistent with the correlation between ammonia (NH3) and Vibrio bacteria, as well as general bacterial growth and decline.
[0055] Additionally, hypochlorous acid can remove hydrogen sulfide (H2S), which can be fatal to fish (HOCL concentration needs to be adjusted), and thus can prevent mass deaths of fish due to bacterial infection.
[0056] Meanwhile, according to research papers on hypochlorous acid and fish, hypochlorous acid can eliminate Vibrio bacteria in seawater within 15 seconds, Vibrio bacteria in fish gills within 12 hours, Vibrio bacteria in fish skin within 24 hours, and Vibrio bacteria in fish intestines within 36 hours.
[0057] Meanwhile, seawater contains sulfur, magnesium, calcium, potassium, and other nutrients that are essential for plants, as well as chlorine and sodium that are not essential for plants.
[0058] Hypochlorous acid is composed of chlorine, which is not a plant nutrient, as a component of HOCL. The present invention is for producing hypochlorous acid by electrolysis using seawater as an electrolyte.
[0059] According to the present invention, the apparatus may include a tank section for cultivating fish inside a storage space for loading seawater, a pump section for sucking up some of the seawater inside the tank section and moving it outside the tank section, and a filter section for supplying contaminated seawater from the pump section and purifying the contaminated seawater.
[0060] The above filtering unit includes an electrolysis device, and the electrolysis device is directly immersed in seawater to electrolyze the seawater into electrolyte, thereby generating hypochlorous acid, and the hypochlorous acid can remove microorganisms and bacteria proliferating in the seawater and remove excrement and ammonia from fish being farmed.
[0061] According to another embodiment of the present invention, the apparatus may include a tank section for cultivating fish inside a storage space for loading seawater, a pump section for sucking up some of the seawater inside the tank section and moving it outside the tank section, and a filter section for supplying contaminated seawater from the pump section and purifying the contaminated seawater.
[0062] At this time, the filtering unit may include a filter unit that physically filters foreign substances in seawater, a sterilizing unit that sterilizes seawater by irradiating ultraviolet rays, a treatment unit that removes carbon dioxide and introduces nitrogen into seawater, and a water quality control unit that chemically removes organic substances and ammonia in seawater.
[0063] In addition, the seawater purified by the filter unit, the sterilizing unit, the treatment unit, and the water quality control unit is resupplied to the water tank unit, and the water quality control unit includes an electrolysis module that generates hypochlorous acid by electrolyzing seawater as an electrolyte, and the electrolysis module is directly immersed in the water quality control unit to generate hypochlorous acid through electrolysis of seawater, and the hypochlorous acid can remove microorganisms and bacteria proliferating in the seawater and remove excrement and ammonia of fish being farmed.
[0064] Furthermore, the electrolysis module can be operated for 5 to 10 minutes per hour to produce hypochlorous acid.
[0065] In addition, the above tank section is configured such that multiple different tank sections are connected to circulate seawater, and the filter section can integrate and purify seawater from multiple tank sections.
[0066] The electrolysis module is a seawater electrolysis device that can prevent corrosion in seawater, and is made of a rigid body whose shape does not change. It may include a frame module that includes a predetermined receiving space, an electrode module to which current is applied so that electrolysis can proceed using seawater as an electrolyte, and a cover module that covers the electrode module to prevent the electrode module from being exposed to seawater so as to prevent corrosion by seawater.
[0067] At this time, the electrode module is immersed in seawater to generate hypochlorous acid and sterilize seawater through hypochlorous acid.
[0068] In addition, the electrode module may include a wire portion that transmits current, a busbar that is a conductor that extends long on both sides and is connected to the wire portion, a (+) pole arranged in a plurality of rows between the busbars, and a (-) pole arranged in a plurality of rows between the busbars, but spaced apart from the (+) pole by a height difference.
[0069] Furthermore, the cover module may have a stick shape with a cross-section in the shape of the letter 'ㄷ', form a receiving space in the shape of the letter 'ㄷ', and include a main cover that surrounds the wire portion and the busbar inside the receiving space and can receive one end of the (+) pole and the (-) pole.
[0070] Meanwhile, the cover module may have a 'U' shaped recessed space formed in the center of the main cover.
[0071] The above cover module may include a first cover having a rectangular parallelepiped shape that is inserted into the inside of the open side ends of the main cover to seal the two side ends of the main cover, a second cover having a rectangular parallelepiped shape and a semicircular groove on one side to accommodate the wire portion and being in close contact with the upper and lower surfaces of the wire portion, and a third cover having a rectangular parallelepiped shape that is coupled to the outside of the open side ends of the main cover to pressurize and thereby close the first cover and the main cover, and having rounded corners.
[0072] At this time, the inside of the main cover can be filled with epoxy while the electrode module is inserted into the receiving space of the main cover, thereby sealing the electrode module so that it is not exposed to seawater.
[0073] In addition, the main cover may have a 'ㄷ' cross-section to prevent the busbar, the (+) pole, and the (-) pole from coming into contact with the lower surface of the main cover, and may include a spacer disposed between the main cover and the busbar.
[0074] Furthermore, it includes a polar spacer disposed between the (+) pole and the (-) pole so that the (+) pole and the (-) pole can be spaced apart from each other, and the (-) pole can be disposed in a relatively higher row than the (+) pole.
[0075] Meanwhile, the front surface of the above (-) pole may be covered with a covering layer made of mesh material.
[0076] At this time, the above-mentioned polar spacer is made of aluminum and can be placed at a predetermined distance inside from the center and both ends of the main cover.
[0077] This embodiment is merely an example to explain the technical idea of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations of this embodiment without departing from the essential characteristics of the present invention.
[0078] This embodiment is not intended to limit the technical idea of the present invention but to explain it, and therefore the scope of the rights of the present invention is not limited by this embodiment.
[0079] The scope of protection of the present invention should be interpreted by the claims, and all technical ideas that are equivalent or equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.
[0080]
[0081] 10 - The present invention
[0082] 50 – Tank
[0083] 60 – Filter section
[0084] 70 – Sterilization Department
[0085] 80 – Church Department
[0086] 90 – Water Quality Control Department
[0087] 100 - Electrolysis Module
[0088]
Claims
1. A tank section including a storage space for loading seawater and cultivating fish inside; A pump unit that sucks up some of the seawater inside the tank and moves it outside the tank. A filtering unit that receives polluted seawater from the pump unit and purifies the polluted seawater. Includes, The above filtering part A circulation filtration system characterized by including an electrolysis device, wherein the electrolysis device is directly immersed in seawater to electrolyze seawater into electrolytes to generate hypochlorous acid, and the hypochlorous acid removes microorganisms and bacteria proliferating in seawater and removes excrement and ammonia from fish being farmed.
2. A tank section including a storage space for loading seawater and cultivating fish inside; A pump unit that sucks up some of the seawater inside the tank and moves it outside the tank. A filtering unit that receives polluted seawater from the pump unit and purifies the polluted seawater. Includes, The above filtering part A filter unit that physically filters foreign substances in seawater; A sterilizing unit that sterilizes seawater by irradiating it with ultraviolet rays; A treatment unit that removes carbon dioxide and introduces nitrogen into seawater; and Water quality control unit that chemically removes organic matter and ammonia in seawater; Includes, A circulation filtration system characterized in that the seawater purified by the filter unit, the sterilization unit, the treatment unit, and the water quality control unit is resupplied to the water tank unit, and the water quality control unit includes an electrolysis module that generates hypochlorous acid by electrolyzing seawater as an electrolyte, and the electrolysis module is directly immersed in the water quality control unit to generate hypochlorous acid through electrolysis of seawater, and the hypochlorous acid removes microorganisms and bacteria proliferating in the seawater and removes excrement and ammonia of fish being farmed.
3. In paragraph 2 The above electrolysis module A circulating filtration system characterized by operating for 5 to 10 minutes per hour to produce hypochlorous acid.
4. In paragraph 2 The above water tank Multiple different tanks are connected to allow seawater to circulate. The above filtering part A circulation filtration system characterized by integrating and purifying seawater from a plurality of above-mentioned tanks.
Citation Information
Patent Citations
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