Self-filtering system

Abstract

The present invention relates to a self-filtering system, and more particularly to a self-filtering system comprising: a tank unit including a receiving space holding seawater, and for farming fish therein; an electrolysis module for generating hypochlorous acid by electrolyzing seawater using an electrolyte; and a sensor unit capable of measuring data relating to the seawater environment within the tank unit (acidity, dissolved oxygen, ammonia, temperature, and salinity), wherein the electrolysis module is directly immersed in the tank unit to electrolyze the seawater and generate hypochlorous acid, the hypochlorous acid eliminates microorganisms and bacteria proliferating in the seawater and removes ammonia and excrement produced by the fish being farmed, thereby enabling waste and foreign substances to be chemically filtered autonomously within the tank unit without any external devices, and a control unit that determines whether to operate the electrolysis module to control the concentration of hypochlorous acid within the tank is included.

Description

Self-filtration system

[0001] The present invention relates to a self-filtration system, and more specifically, to a self-filtration system characterized by comprising: a tank section for cultivating fish inside a receiving space for loading seawater; an electrolysis module that generates hypochlorous acid by electrolyzing seawater with an electrolyte; and a sensor section capable of measuring data regarding the seawater atmosphere (acidity, dissolved oxygen, ammonia, temperature, salinity) of the tank section, wherein the electrolysis module is directly immersed in the tank section to generate hypochlorous acid by electrolyzing seawater, and the hypochlorous acid removes microorganisms and bacteria proliferating in the seawater and removes ammonia generated from the excrement of fish being cultivated, thereby enabling the tank section to chemically filter waste and foreign substances independently without an external device, and a control section that controls the concentration of hypochlorous acid in the tank by determining whether the electrolysis module is operated.

[0002] The content described in this section merely provides background information regarding the present invention and does not constitute prior art.

[0003] Hypochlorous acid is a natural, non-toxic oxidizing agent that kills 99.9% of dangerous pathogens.

[0004] Hypochlorous acid is a substance with powerful bactericidal properties produced by white blood cells or neutrophils that fight against infection and disease in our bodies. It destroys bacteria, and the excess combines with organic matter in the body to be reduced to water, so it causes no harm to the human body.

[0005] In fact, HOCl has superior sterilizing power compared to conventional disinfectants such as ozone water, ethanol, and sodium hypochlorite, and it is also listed as a food additive by the Ministry of Food and Drug Safety.

[0006] Furthermore, since there is absolutely no skin irritation, respiratory issues, or problems arising from accidental ingestion, it can be considered harmless to the human body, and is evaluated as having a high level of safety.

[0007] Meanwhile, in the aquaculture industry, active treatment agents or hydrochloric acid (inorganic acid) are being used illegally as disinfectants to remove sea lettuce, other weeds, and other diseases.

[0008] Such hydrochloric acid (inorganic acid) is removed by seawater diluted with industrial hydrochloric acid at a concentration of 35% or higher, and it has negative effects such as the destruction of the marine ecosystem and fishing grounds due to the death of plankton and fish and shellfish, increasing consumer distrust and potentially amplifying problems in a chain reaction such as a decrease in domestic and international consumption.

[0009] Meanwhile, organic acids (including 9.5% hydrochloric acid) are also used as disinfectants. However, like inorganic acids, organic acids require a long processing time and additional manpower, which increases processing time and labor costs. Furthermore, a significant number of fishermen dispose of them in the sea, which exacerbates concerns about the waste of enormous costs and environmental pollution.

[0010] Meanwhile, scientific research on the impact of active treatment agents on marine ecosystems is lacking, and issues regarding labor shortages and labor costs are also emerging due to the high difficulty of the active treatment process.

[0011] For example, aquaculture farms establish a recirculating aquaculture system through a series of processes such as aquaculture tanks, physical filtration, UV sterilization, decarbonization and nitrogen treatment, biological filtration, and oxygen dissolvers.

[0012] In particular, when sterilizing, a disinfectant is added, but there was a problem that workers needed to periodically add the disinfectant and manage it.

[0013] In order to solve the problems of the aforementioned conventional disinfectants and circulating filtration systems, some domestic and overseas companies have conducted research on methods to generate disinfectants that are harmless to humans and the environment, or to automate sterilization systems that are easy to manage without human labor. However, there have been no cases of full-scale commercialization because the cost required to equip such a structure for actual productization is excessive, or even if not, the effect is not significant compared to the manufacturing cost of the device, resulting in lower market competitiveness compared to conventional disinfectants and filtration systems.

[0014] Therefore, as described above, there is a need to develop a device and method capable of solving the problems of the conventional technology.

[0015] The problem to be solved by the present invention is to compensate for the disadvantages of the aforementioned prior art, and the objective of the present invention is as follows.

[0016] First, we aim to provide a self-filtration system applicable to fish farms, bathtubs, live fish transport trucks, aquariums, etc., capable of self-filtration without the need for separate external devices.

[0017] Second, we aim to provide an eco-friendly self-filtration system that generates HOCl, a natural non-toxic oxidizing agent, by electrolyzing seawater as an electrolyte, and effectively removes harmful bacteria by using it as a disinfectant.

[0018] Third, we aim to provide a self-filtration system capable of preventing water pollution by controlling the nitrogen cycle.

[0019] Fourth, we aim to provide a self-filtration system that can be easily applied to existing or new facilities, is inexpensive, and is easy to maintain.

[0020] Fifth, we intend to provide a self-filtration system capable of setting the operation status and cycle of the electrolysis module by applying correction values ​​while considering various factors that may affect the concentration of hypochlorite phase, such as salinity, natural decomposition, ammonia reaction, temperature, and current efficiency.

[0021] The problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0022]

[0023] According to the present invention, a self-filtration system is provided, characterized in that the electrolysis module is directly immersed in the tank portion to determine whether the electrolysis module is operated and to control the concentration of hypochlorous acid in the tank, in an environment equipped with a receiving space for loading seawater and a tank portion for cultivating fish therein, an electrolysis module that generates hypochlorous acid by electrolyzing seawater with an electrolyte, and a sensor portion capable of measuring data on the seawater atmosphere (acidity, dissolved oxygen, ammonia, temperature, salinity) of the tank portion, thereby generating hypochlorous acid by electrolyzing seawater, and the hypochlorous acid removes microorganisms and bacteria proliferating in the seawater and removes excrement and ammonia from the fish being cultivated, so that waste and foreign substances can be chemically filtered independently in the tank portion without an external device, and the system includes a control portion that controls the concentration of hypochlorous acid in the tank by determining whether the electrolysis module is operated.

[0024] At this time, the control unit can control the concentration of hypochlorous acid by applying an operation correction factor.

[0025] Furthermore, the above-mentioned operation correction factor may have a current efficiency correction factor with a value of 0.65 to 0.85 to control the actual amount of hypochlorous acid generated relative to the theoretical amount of hypochlorous acid generated according to the operating time of the electrolysis module, taking into account electrode contamination, electrode corrosion, water temperature, and electrolyte concentration.

[0026] In addition, the above-mentioned operation correction factor may have a temperature correction factor having a maximum value at a water temperature of 25 degrees, a reduced coefficient value of 10 to 20% compared to the maximum value at 15 degrees at a water temperature of 25 degrees, and a reduced coefficient value of 10 to 20% compared to the maximum value at 30 degrees at a water temperature of 25 degrees.

[0027] Meanwhile, the above-mentioned operational correction factor may have a natural decomposition correction factor that considers the natural decomposition of hypochlorous acid by taking into account the level of light exposure.

[0028] At this time, the natural decomposition correction factor may have a value of 0.8 to 0.85 when the water tank is an indoor open type, a value of 0.85 to 0.90 when the water tank is an indoor closed type, a value of 0.40 to 0.55 when the water tank is an outdoor open type, and a value of 0.65 to 0.75 when the water tank is an outdoor closed type.

[0029] In addition, the control unit always sets the salinity of the water tank to within 2.6 to 3.1%, and the operation correction factor has a maximum value when the salinity is 3.1%, and can have a salinity correction factor with a value of 0.84 to 0.97 as the salinity decreases.

[0030] Furthermore, the above-mentioned operational correction factor may have an ammonia correction factor that corrects the production of hypochlorous acid resulting from the reaction between hypochlorous acid and ammonia due to ammonia generation caused by the type, size, feed supply amount, and physiological phenomena of the fish being farmed.

[0031] Meanwhile, the above ammonia correction factor is calculated by considering the total body weight of the fish and the ammonia emission rate by fish type to correct for the reduction in hypochlorous acid resulting from the reaction between ammonia and hypochlorous acid, and fish such as flounder, red sea bream, eel, and sea bass can be classified as a high ammonia emission group, while shellfish such as oysters, abalone, Manila clams, and surf clams can be classified as a low ammonia emission group.

[0032] At this time, the ammonia correction factor may include a fish growth weight having an arbitrary value such that the amount of ammonia produced increases as it approaches adulthood, taking into account the degree of growth of the fish.

[0033] Furthermore, the above-mentioned operational correction factor can be calculated by considering seawater volume, salinity, pH, water temperature, electrode surface area, power, makeup water cycle, and DO.

[0034] Additional means of solution of the present invention will be partially described in the following description, which may be partially easily identified from the description, or may be obtained through the practice of the present invention.

[0035] The foregoing general description and the following detailed description are merely illustrative and illustrative and do not limit the invention as described in the claims.

[0036]

[0037] The effects of the present invention configured as described above are explained as follows.

[0038] First, it can be applied to fish farms, bathtubs, live fish transport trucks, aquariums, etc., and can filter internally without the need for separate external devices.

[0039] Second, it is eco-friendly because it generates HOCl, a natural, non-toxic oxidizing agent, by electrolyzing seawater as an electrolyte, and can effectively remove harmful bacteria by using it as a disinfectant.

[0040] Third, water pollution can be prevented by controlling the nitrogen cycle.

[0041] Fourth, it can be easily applied to existing or new facilities, is inexpensive, and easy to maintain.

[0042] Fifth, the operation status and cycle of the electrolysis module can be set by applying correction values ​​considering various factors that may affect the concentration of the hypochlorite phase, such as salinity, natural decomposition, ammonia reaction, temperature, and current efficiency.

[0043] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0044] FIG. 1 is a conceptual diagram of a self-filtration system according to one embodiment of the present invention.

[0045] Figure 2 is a graph showing the concentration of hypochlorous acid in a water tank according to one embodiment of the present invention.

[0046]

[0047]

[0048] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the attached drawings.

[0049] However, in describing a specific embodiment of the present invention, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0050] The aforementioned objects, features, and advantages of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings. However, as the present invention is subject to various modifications and may include various embodiments, specific embodiments are illustrated in the drawings and described in detail below.

[0051] If it is determined that a detailed description of known functions or configurations related to the present invention could unnecessarily obscure the essence of the invention, such detailed description is omitted. Furthermore, numbers used in the description of this specification are merely identification symbols to distinguish one component from another.

[0052] Furthermore, the suffix "bu" for components used in the following description is used merely to facilitate the drafting of the specification or for interchangeable purposes, and does not inherently possess a distinct meaning or role.

[0053] FIG. 1 is a conceptual diagram of a self-filtration system according to one embodiment of the present invention.

[0054] Figure 2 is a graph showing the concentration of hypochlorous acid in a water tank according to one embodiment of the present invention.

[0055] According to the present invention, a self-filtration system is provided, characterized in that the electrolysis module is directly immersed in the tank portion to determine whether the electrolysis module is operated and to control the concentration of hypochlorous acid in the tank, in an environment equipped with a receiving space for loading seawater and a tank portion for cultivating fish therein, an electrolysis module that generates hypochlorous acid by electrolyzing seawater with an electrolyte, and a sensor portion capable of measuring data on the seawater atmosphere (acidity, dissolved oxygen, ammonia, temperature, salinity) of the tank portion, thereby generating hypochlorous acid by electrolyzing seawater, and the hypochlorous acid removes microorganisms and bacteria proliferating in the seawater and removes excrement and ammonia from the fish being cultivated, so that waste and foreign substances can be chemically filtered independently in the tank portion without an external device, and the system includes a control portion that controls the concentration of hypochlorous acid in the tank by determining whether the electrolysis module is operated.

[0056] Meanwhile, during the electrode reaction in the above-mentioned electrolysis module, chloride ions (Cl) may adsorb to or react with the electrodes and precipitate in the form of salt (NaCl). In particular, if an oxidation reaction occurs continuously at one electrode (+ electrode), chlorides and other precipitates accumulate on the electrode surface. Such precipitates cause a decrease in electrode efficiency and electrode damage, and can degrade the performance of the generating device.

[0057] Therefore, to resolve the aforementioned problems, the electrolysis module may be equipped with a polarity changing function. By switching the positive (+) and negative (-) electrodes, precipitation can be prevented, and periodically changing the electrode polarity allows precipitated salt to be electrochemically re-dissociated or removed, which is effective in extending electrode lifespan.

[0058] At this time, the control unit can control the concentration of hypochlorous acid by applying an operation correction factor.

[0059] It is most desirable to maintain the concentration of hypochlorous acid according to the experiment at 0.3 to 0.5 ppm. The self-filtration system according to the embodiment of the present invention may apply an operation correction factor to maintain the concentration of hypochlorous acid at 0.3 to 0.5 ppm.

[0060] The operation correction factor may include a current efficiency correction factor, a temperature correction factor, a natural decomposition correction factor, a salinity correction factor, and an ammonia correction factor.

[0061] In other words, the actual amount of hypochlorous acid produced is defined as the theoretical amount of hypochlorous acid produced * current efficiency correction factor * temperature correction factor * natural decomposition correction factor * salinity correction factor * ammonia correction factor.

[0062] Therefore, in this self-filtration system, the operation of the electrolysis module and the operating time are determined based on the actual amount of hypochlorous acid produced.

[0063] Therefore, the coefficients based on various factors have values ​​less than 1, and considering this fact, the actual amount of hypochlorous acid produced is always lower than the theoretical amount of hypochlorous acid produced.

[0064]

[0065] In other words, the actual amount of HOCl produced can be calculated by multiplying each correction factor by the theoretically calculated amount of HOCl produced.

[0066] In other words, the accuracy and efficiency of the HOCl self-filtration system can be increased through the operation correction factor as described above.

[0067]

[0068] The current efficiency correction factor is described below.

[0069] Furthermore, the above-mentioned operation correction factor may have a current efficiency correction factor with a value of 0.65 to 0.85 to control the actual amount of hypochlorous acid generated relative to the theoretical amount of hypochlorous acid generated according to the operating time of the electrolysis module, taking into account electrode contamination, electrode corrosion, water temperature, and electrolyte concentration.

[0070] In reality, the amount of hypochlorous acid produced is reduced by 10 to 20 percent due to variables such as electrode contamination and corrosion, temperature, electrolyte concentration, and pH.

[0071] To suppress excessive HOCl PPM generation, the default value is 100%, and it is typically determined within the range of 0.65 to 0.85.

[0072] The purpose of keeping HOCl PPM below the standard level is to maintain water quality and prevent harm to fish.

[0073]

[0074] Current efficiency is defined as the ratio between the amount of HOCl actually produced and the theoretically calculated amount produced.

[0075]

[0076] Current Efficiency = [Actual amount of HOCl generated (g) / Theoretical amount of HOCl calculated (g)] * 100

[0077]

[0078] The temperature correction factor is described below.

[0079] The above operating correction factor may have a maximum value at a water temperature of 25 degrees, a reduced coefficient value of 10 to 20% compared to the maximum value at 15 degrees at a water temperature of 25 degrees, and a reduced coefficient value of 10 to 20% compared to the maximum value at 30 degrees at a water temperature of 25 degrees.

[0080] Generally, the temperature range suitable for the HOCl generation reaction is 15 to 25 degrees.

[0081] Generally, efficiency is measured based on 25 degrees, and temperatures that are too low or too high can lead to a decrease in efficiency. At 15 degrees, efficiency decreases by about 10–20%, and as the temperature increases to 30 degrees, the reaction rate improves, resulting in an increase in efficiency of 10–20%.

[0082] As the temperature rises, the reaction rate increases exponentially, but the possibility of side reactions also increases. On the other hand, if the temperature is too low, the production rate slows down, and if it is too high, HOCl decomposes rapidly.

[0083] The reaction rate of HOCl production is sensitive to temperature according to the Arrhenius equation.

[0084] Temperature is k*e^(-Ea / (R*T)), where k is the reaction rate constant, Ea is the activation energy (KJ / mol), R is the gas constant, and T is the absolute temperature.

[0085]

[0086] The ammonia correction factor is described below.

[0087] Furthermore, the above-mentioned operational correction factor may have an ammonia correction factor that corrects the production of hypochlorous acid resulting from the reaction between hypochlorous acid and ammonia due to ammonia generation caused by the type, size, feed supply amount, and physiological phenomena of the fish being farmed.

[0088] Meanwhile, the above ammonia correction factor is calculated by considering the total body weight of the fish and the ammonia emission rate by fish type to correct for the reduction in hypochlorous acid resulting from the reaction between ammonia and hypochlorous acid, and fish such as flounder, red sea bream, eel, and sea bass can be classified as a high ammonia emission group, while shellfish such as oysters, abalone, Manila clams, and surf clams can be classified as a low ammonia emission group.

[0089] At this time, the ammonia correction factor may include a growth weight having an arbitrary value such that the amount of ammonia produced increases as it approaches adulthood, taking into account the degree of growth of the fish.

[0090] Meanwhile, among the growth weights, the growth weight of fish has a linear slope, and the growth weight of fish and shellfish can be calculated in a form where the slope decreases as it approaches adulthood, and the growth weight of crustaceans can be calculated in a form where the slope gradually decreases to the midpoint between the minimum and maximum values, and the slope gradually increases from the midpoint to the maximum value.

[0091] Furthermore, the above-mentioned operational correction factor can be calculated by considering seawater volume, salinity, pH, water temperature, electrode surface area, power, makeup water cycle, and DO.

[0092] The initial NH3 concentration in the system, such as fish size, type, feed supply amount, water temperature, physiological ecology, and water quality environment, is a major variable that determines the amount of reaction with HOCl.

[0093] The initial concentration of HOCl and the amount continuously supplied determine the reactivity with ammonia, and if sufficient HOCl is not supplied relative to the ammonia concentration, the sterilization efficiency decreases.

[0094]

[0095] Ammonia emissions can be calculated as follows.

[0096]

[0097] General Ammonia Emission Calculation Formula: The daily ammonia emission of fish can be calculated using the following empirical formula.

[0098] It has the formula N_NH3 = R*W, where R is the ammonia discharge rate by fish type ((mg*N / kg)*(fish body weight / day)), and W is the total fish body weight (kg).

[0099]

[0100] The total emission amount is the sum of the values ​​obtained by multiplying the number of fish species and the ammonia emission rate of a specific species by the total body weight of that specific species, and summing the results for each species.

[0101] The following is a figure showing the ammonia emission characteristics of fish and shellfish.

[0102] Classification Type | Average Body Weight (kg) | Ammonia Emission Rate (Jr) (mg N / kg / day) Characteristics Fish Flatfish (Hallocratus) | 1.0250 | Strong adaptability to low-temperature environments; emission varies depending on feed intake Fish Red Seabream | 1.0300 | Increased emission due to high-protein feed intake; frequently used in aquaculture farms Fish Eel | 1.5200 | Adaptable to low-oxygen environments; low ammonia emission Fish Sea Bass | 1.5280 | Adaptability to various environments; ammonia concentration management becomes more important as stocking density increases Clams Oyster | 0.0520 | Low emission depending on feed intake; stocking density control is important Clams Scallop | 0.125 | Relatively low ammonia emission Others Short-necked Clam | 0.0215 | Located in sediment layers, resulting in low ammonia emission and sensitivity to the environment Others Clam | 0.0112 | Sensitive to pH changes and low ammonia emission

[0103] The natural decomposition correction factor is described below.

[0104] Meanwhile, the above-mentioned operational correction factor may have a natural decomposition correction factor that considers the natural decomposition of hypochlorous acid by taking into account the level of light exposure.

[0105] At this time, the natural decomposition correction factor may have a value of 0.8 to 0.85 when the water tank is an indoor open type, a value of 0.85 to 0.90 when the water tank is an indoor closed type, a value of 0.40 to 0.55 when the water tank is an outdoor open type, and a value of 0.65 to 0.75 when the water tank is an outdoor closed type.

[0106] In other words, by predicting the initial concentration of HOCl and the residual concentration over time and reflecting this in the system design, the actual concentration being maintained can be estimated, and the amount of HOCl added or the maintenance frequency can be adjusted by taking into account the natural decomposition of hypochlorous acid.

[0107] As a result, through the natural decomposition correction factor, water quality stability can be ensured by maintaining consistent sterilization and oxidation capabilities, and operational efficiency can be improved and operating costs reduced by optimizing the amount of HOCl input.

[0108] In addition, it can maintain performance under various environmental conditions and improve aquaculture productivity by reducing fish mortality and improving their health.

[0109] The natural decomposition correction reflects the natural decomposition rate of HOCl, and the natural decomposition rate is modeled as a function of time.

[0110]

[0111] The decomposition constant is e^(-λt), where λ is the natural decomposition rate constant (1 / day) and t is defined as time (days).

[0112] Condition Temperature Effect UV Effect Aeration Effect Circulation Pump Effect HOCl Decomposition Rate Reduction Efficiency (% Immunity, Residual) Additional Considerations Indoor OPEN TYPE Low (Stable) None Slight Increase Slight Increase Low 80~85% Slight increase in decomposition rate due to circulation pump and aeration Indoor CLOSE TYPE Very Low (Stable) None Slight Increase Slight Increase Very Low 85~90% Good stability, minimal influence of circulation pump Outdoor OPEN TYPE High (Seasonal Change) High (Influence of strong UV) Increase Slight Increase High 40~55% Combined influence of UV, circulation pump, and aeration Outdoor CLOSE TYPE Medium (Mitigated) Low Increase Slight Increase Medium 65~75% Increase in decomposition rate due to circulation pump shunt, reduced short-term UV influence

[0113]

[0114]

[0115] The salinity correction factor is described below.

[0116] In addition, the control unit always sets the salinity of the water tank to within 2.6 to 3.1%, and the operation correction factor has a maximum value when the salinity is 3.1%, and can have a salinity correction factor with a value of 0.84 to 0.97 as the salinity decreases.

[0117] In HOCl generation systems, it is generally efficient to set the salinity to a standard of 3.1%. Considering that salinity is maintained at or below the standard of 3.1% due to salinity fluctuation factors as shown below, excessive HOCl PPM can be harmful to water quality management and fish, so it is most desirable to set the standard to 3.1%.

[0118]

[0119] Salinity correction is a formula that reflects the change in Cl ion concentration according to salinity.

[0120] The salinity correction factor is [Cl⁻]Actual / [Cl⁻]Reference, where [Cl⁻]Actual refers to the Cl⁻ ion concentration at the actual salinity and [Cl⁻]Reference refers to the Cl⁻ ion concentration at the reference salinity.

[0121]

[0122] Salinity (%) HOCl Production Amount (PPM) Production Amount Per Salinity (%) 3.1 1.0 100.0 3.0 0.9 57 796.7 2.9 0.9 35 593.5 52.8 0.9 0 3290.3 22.7 0.8 71 87.1 2.6 0.8 38 783.87

[0123] Meanwhile, the above-mentioned operation correction factor is calculated by considering the amount of seawater, salinity, pH, water temperature, surface area of ​​the electrode, power, makeup water cycle, and DO, and it can be determined whether to proceed with the required hypochlorous acid by operating the electrolysis module once or multiple times on a daily basis.

[0124] When operating in a single cycle, running the generator only once a day simplifies management, reduces power consumption, and shortens operating time. Furthermore, since a high concentration of HOCl is generated at once, a rapid sterilization effect can be expected. It is also easy to manage.

[0125] However, natural decomposition of HOCl: Since HOCl naturally decomposes over time (about 20% per day), it is difficult to maintain a uniform concentration throughout the day, and if the initial HOCl concentration rises rapidly, it may cause stress to marine organisms (fish, etc.).

[0126] In addition, as hypochlorous acid decomposes—similar to the natural decomposition correction factor—its concentration decreases over time, potentially leading to a reduction in the sterilization effect.

[0127] When operated multiple times (for example, by operating every 6 hours to generate 0.25 ppm of hypochlorous acid), the HOCl concentration can be maintained at a constant level throughout the day, enabling a continuous sterilization effect. Minimization: Frequent generation at low concentrations reduces oxidative stress on fish and microbial ecosystems. Since HOCl is regenerated before it naturally decomposes, a constant sterilization power can be maintained, and an environment with minimal fluctuation is preserved, preventing stress on marine organisms and a decline in survival rates.

[0128] However, power consumption may increase slightly as the electrolysis module must be operated multiple times, and the workload may increase as the generation cycle must be precisely controlled and managed.

[0129] Therefore, generating HOCl by operating the electrolysis module multiple times is more effective in terms of uniform sterilization effect and reduction of stress on fish, and especially if one wants to ensure long-term water quality stability, an appropriately divided generation cycle can be considered the most desirable embodiment.

[0130] That is, as shown in FIG. 2, after a certain period of time has elapsed following the operation of the self-filtration system, the hypochlorous acid in the water chamber can be maintained at an optimal concentration by reflecting various coefficients.

[0131] This embodiment is merely an illustrative explanation of the technical concept 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 within the scope of the essential characteristics of the present invention.

[0132] This embodiment is intended to explain, not limit, the technical concept of the present invention, and therefore, the scope of the rights of the present invention is not limited by this embodiment.

[0133] The scope of protection of the present invention shall be interpreted by the claims, and all technical ideas recognized as equivalent or equivalent thereto shall be interpreted as being included in the scope of rights of the present invention.

[0134]

[0135] 50 – Water tank section

[0136] 100 – Electrolysis Module

[0137]

[0138]

Claims

1. A tank section including a storage space for loading seawater and for cultivating fish inside; An electrolysis module that generates hypochlorous acid by electrolyzing seawater with an electrolyte; and A sensor unit capable of measuring data on the seawater atmosphere (acidity, dissolved oxygen, ammonia, temperature, salinity) of the above-mentioned tank In an environment equipped with The above electrolysis module is directly immersed in the above water tank to generate hypochlorous acid by electrolyzing seawater, and Hypochlorous acid can chemically filter waste and foreign substances within the tank itself without external devices by removing microorganisms and bacteria proliferating in seawater and removing ammonia generated from the excrement of farmed fish. A control unit that controls the concentration of hypochlorous acid in a water tank by determining whether to operate the above-mentioned electrolysis module. A self-filtration system characterized by including 2. In Paragraph 1 The above control unit A self-filtration system characterized by controlling the concentration of hypochlorous acid by applying an operation correction factor 3. In Paragraph 2 The above operating correction factor is A current efficiency correction factor having a value of 0.65 to 0.85 to control the actual amount of hypochlorous acid generated relative to the theoretical amount generated according to the operating time of the electrolysis module, taking into account electrode contamination, electrode corrosion, water temperature, and electrolyte concentration. A self-filtration system characterized by having 4. In Paragraph 2 The above operating correction factor is A temperature correction factor that has a maximum value at a water temperature of 25 degrees, a coefficient value reduced by 10–20% compared to the maximum value at 25 degrees at a water temperature of 15 degrees, and a coefficient value reduced by 10–20% compared to the maximum value at 25 degrees at a water temperature of 30 degrees. A self-filtration system characterized by having 5. In Paragraph 2 The above operating correction factor is Natural decomposition correction factor that considers the natural decomposition of hypochlorous acid in light exposure level A self-filtration system characterized by having 6. In Paragraph 5 The above natural decomposition correction factor is A self-filtration system characterized in that the water tank has a value of 0.8 to 0.85 when the water tank is in an indoor open type, a value of 0.85 to 0.90 when the water tank is in an indoor closed type, a value of 0.40 to 0.55 when the water tank is in an outdoor open type, and a value of 0.65 to 0.75 when the water tank is in an outdoor closed type.

7. In Paragraph 2 The above control unit always sets the salinity of the above water tank to within 2.6~3.1%, and The above operating correction factor is A salinity correction factor that has a maximum value at a salinity of 3.1% and a value of 0.84 to 0.97 as the salinity decreases. A self-filtration system characterized by having 8. In Paragraph 2 The above operating correction factor is Ammonia correction factor that corrects the production of hypochlorous acid resulting from the reaction between hypochlorous acid and ammonia due to ammonia generation caused by the type, size, feed supply, and physiological phenomena of fish being farmed. A self-filtration system characterized by having 9. In Paragraph 8 The above ammonia correction factor is A self-filtration system characterized by being calculated by considering the total body weight of fish and the ammonia emission rate by fish type to correct for the reduction in hypochlorous acid resulting from the reaction between ammonia and hypochlorous acid, classifying fish such as flounder, red sea bream, eel, and sea bass into a high-ammonia emission group, and shellfish such as oysters, abalone, Manila clams, and surf clams into a low-ammonia emission group.

10. In Paragraph 9 The above ammonia correction factor is Growth weights having arbitrary values ​​that increase ammonia production as the fish approaches adulthood, taking into account the fish's growth stage. A self-filtration system characterized by including 11. In Paragraph 2 The above operating correction factor is A self-filtration system characterized by being calculated by considering seawater volume, salinity, pH, water temperature, electrode surface area, power, makeup water cycle, and DO.

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