Deodorization and Sterilization Water Recycling System Based On Micro-Plasma

Abstract

The present invention relates to a microplasma-based odor removal and sterilized water recycling system, and more specifically, to an odor removal and sterilized water recycling system that improves hygiene by collecting and removing odors generated in facilities or means used by multiple users, such as public facilities, public transportation, and public restrooms, and in particular, to a system that improves resource utilization efficiency by using microplasma to convert water stored in a water tank into oxidized sterilized water, removing odors by contacting collected odors with the oxidized sterilized water, and reusing the oxidized sterilized water used for odor removal by supplying it to a toilet flushing line. To this end, the present invention comprises: a body in the form of a hollow enclosure provided with an air inlet port for external air to enter; a water tank provided inside the body, formed in the form of an enclosure having a predetermined volume, including an inlet port for water entry and a drain port for draining stored water; an odor adsorption and air purification unit including an inlet vent that transmits air introduced through the air inlet port to the water tank; and OH radicals and reactive oxygen species (ROS) generated by performing oxygen-based plasma discharge, provided inside the body. It is characterized by including a microplasma generator that converts stored water into sterilized water by delivering oxygen species to the water tank, and an ultrasonic gas dissolving unit that is provided inside the water tank and applies ultrasound to the sterilized water stored in the water tank to improve the solubility of odor components contained in the air.

Description

Technology Field

[0001] The present invention relates to a microplasma-based odor removal and sterilized water recycling system, and more specifically, to a system that improves hygiene by collecting and removing odors generated in facilities or means used by multiple users, such as public facilities, public transportation, and public restrooms. In particular, the invention relates to a microplasma-based odor removal and sterilized water recycling system that improves resource utilization efficiency by using microplasma to convert water stored in a water tank into oxidized sterilized water, removing odors by contacting collected odors with the oxidized sterilized water, and reusing the oxidized sterilized water used for odor removal by supplying it to a toilet flushing line to be recycled as toilet flushing water. Background Technology

[0002] Generally, air purifiers are structured to forcibly draw in contaminated air from a sealed space, such as an indoor space or the interior of a vehicle, capture and remove dust, harmful substances, and odors through various filters and sterilization units, and then discharge the purified air.

[0003] Meanwhile, in general restrooms, methods used to eliminate odors include installing powered exhaust fans or non-powered exhaust grilles attached to the ceiling or walls to expel indoor air to the outside, or using air fresheners to dilute the smell. However, odors emitted and permeated into restrooms or bathrooms are not easily removed, causing them to linger for a long time and consequently making the indoor environment unsanitary.

[0004] Meanwhile, existing air purifiers or odor removal devices inhale air containing odors, and methods for removing odors include filter systems, UV systems, and chemical treatment systems.

[0005] Here, any one of the adsorption, absorption, chemical reaction, or catalytic filter methods can be utilized. However, odors are a mixture of various components such as hydrogen sulfide, ammonia, and volatile organic compounds. There are issues where filters may effectively remove only specific substances while being ineffective against others, have limitations in removing low-concentration odors, and experience a rapid decline in deodorization capacity when the filter's adsorbent becomes saturated, resulting in the odor being emitted untreated.

[0006] Furthermore, there is a problem in that the lifespan of filters varies significantly depending on odor concentration, composition, humidity, and flow rate at the installation site, making prediction difficult. In the case of large-scale facilities, the cost of replacing activated carbon or adsorbents is high, and additional costs are incurred for transportation and disposal. In particular, since saturated filters contain large amounts of odor components or harmful gases after use, requiring separate waste treatment, there is a problem of increased costs associated with replacement and disposal.

[0007] Furthermore, in high-humidity environments, moisture condenses on the surface of the activated carbon, occupying the adsorption space and causing a rapid decline in performance; at low temperatures, the reaction rate slows down, and at high temperatures, there is a risk of adsorbed components being back-desorbed and re-released; and there are problems where dust, oil mist, and aerosols entering along with odors clog the filter, leading to increased pressure loss and performance degradation.

[0008] Furthermore, if the filter becomes clogged, the pressure of the blower increases, leading to higher power consumption. Additionally, to ensure sufficient residence time, a larger filter cross-sectional area or thickness is required, which enlarges the device and necessitates a larger installation space. Moreover, if the airflow is not uniformly distributed across the front of the filter, a bypass phenomenon occurs where some air passes through without being completely purified.

[0009] Furthermore, because this method merely captures odors, it does not eliminate the source itself, requiring repeated filter replacement; adsorbed components may pose a risk of ignition or toxic gas leakage; and as performance becomes difficult to predict over time, environmental regulatory standards may be temporarily exceeded.

[0010] On the other hand, while the UV method has the advantage of being easy to install and having few secondary pollutants, the odor is a multi-component mixture of sulfur compounds, amines, ammonia, hydrocarbons, and aldehydes. However, components with low UV reactivity, such as some reducing sulfur compounds, aromatics, and halogenated VOCs, have low treatment efficiency and are not completely inorganized. As a result, irritating byproducts such as aldehydes, organic acids, and oxidized compounds remain, causing the odor to change and become perceptible.

[0011] In addition, moisture, dust, aerosols, and color components in the gas absorb or scatter UV light, reducing the effective dose. Furthermore, to ensure sufficient residence time and light intensity in high flow rates and low-concentration odors, the reactor volume and the number of lamps must be significantly increased, leading to problems such as a substantial rise in initial installation and operating costs.

[0012] In addition, when the transmittance and dose decrease due to lamp aging or contamination of the quartz sleeve, sleeve cleaning and lamp replacement must be performed, but there is a problem in that the timing of replacement varies depending on external factors such as the type of odorous gas, humidity, and dust, making predictive maintenance difficult.

[0013] Furthermore, since UV-C leakage poses a risk of skin and eye damage, shading, interlocks, and leak monitoring must be provided as essentials. Additionally, there is a possibility of exceeding workplace environmental standards due to excessive ozone generation. While the management of irradiance and residence time is critical for UV systems, in practice, effective dose fluctuates due to sleeve contamination and flow rate variations, making immediate assessment very difficult.

[0014] In addition, chemical treatment methods have the problem that it is difficult to remove complex odors with a single chemical, so multiple chemicals must be used in combination, and the removal efficiency is low because there is little opportunity for reaction contact with diluted atmospheric odors, and some substances may be partially oxidized to create secondary odors such as aldehydes and organic acids.

[0015] In addition, a large amount of chemical waste is generated after the reaction with absorbed pollutants, and if the wash water is discharged as is, there is a concern about water pollution and violations of environmental regulations, requiring separate treatment, which leads to increased costs.

[0016] In addition, since the odor concentration varies significantly depending on the time, season, and load, it is difficult to control the amount of chemical injected, and there is a problem in that it is difficult to accurately reflect the actual degree of odor component removal using only indicators such as pH and ORP. If the chemical is under-injected, complaints arise due to the failure to remove odors, and if the chemical is over-injected, problems such as increased costs, residual chemical emissions, and accelerated corrosion occur.

[0017] In addition, there is a heavy burden of operating costs as chemicals must be purchased continuously, additional costs and processes are required to treat the generated waste liquid and sludge separately, and there are problems such as the scrubbing tower needing to be enlarged to ensure sufficient contact time and increased equipment costs when processing large flow rates. Prior art literature

[0018] Republic of Korea Registered Patent No. 10-2614611 (Registered Dec. 12, 2023) Republic of Korea Registered Utility Model No. 20-0415011 (Registered Apr. 20, 2006) The problem to be solved

[0019] The present invention is proposed to solve the above-mentioned problems and aims to provide an odor removal and sterilization water recycling system capable of resource recycling by applying microplasma technology to generate oxidative sterilization water using oxygen, removing odors by bringing air containing odors into contact with the oxidative sterilization water, and supplying the sterilization water used for odor removal to a toilet flushing line for recycling.

[0020] In particular, the present invention aims to provide an odor removal and sterilized water recycling system capable of providing relatively high odor removal efficiency compared to existing odor treatment methods using filters or chemicals.

[0021] In addition, the present invention aims to provide an odor removal and sterilized water recycling system with wide applicability, as it can be manufactured in various sizes and installed not only in large public restrooms such as those in high-speed trains, railway vehicles, shopping malls, terminals, and subway stations, but also in factories and wastewater treatment plants where odor problems are severe. means of solving the problem

[0022] To achieve the above objective, the present invention comprises a body in the form of a hollow housing with an air inlet opening for external air to be introduced, and

[0023] A water tank provided inside the above body, formed in the shape of a housing having a predetermined volume, and including an inlet for water to be introduced and a drain for water to be drained, and

[0024] An odor adsorption and air purification unit including an inlet vent that delivers air introduced through the air inlet hole to the water tank, and

[0025] A micro-plasma generator provided inside the above body, which performs oxygen-based plasma discharge to generate OH radicals and reactive oxygen species (ROS) and transfers them to the water tank to convert the stored water into sterilized water, and

[0026] It is characterized by including an ultrasonic gas dissolving unit that is provided inside the water tank and applies ultrasound to the sterilized water stored in the water tank to improve the solubility of odor components contained in the air.

[0027] In addition, the microplasma generator is characterized by including a microplasma unit that generates microplasma by receiving oxygen or air, a nanobubble generator for dispersing active oxygen species generated in the microplasma unit in the form of microbubbles, and a controller that controls the microplasma unit and the nanobubble generator to regulate plasma generation conditions and the amount of nanobubbles generated.

[0028] In addition, the ultrasonic gas dissolving unit is characterized by transmitting ultrasonic waves having a frequency of 20 kHz to 2 MHz to the sterilized water stored in the water tank, and decomposing or dissolving odorous substances in the sterilized water using the cavitation phenomenon.

[0029] Furthermore, the drain of the water tank is connected to the toilet flushing water supply line to recycle the sterilized water in which odor-causing substances are dissolved as toilet flushing water.

[0030] In addition, the inlet vent is formed in the shape of a hollow tubular body and includes an inlet that is positioned between the air inlet hole of the body and the water tank to receive air that has passed through the air inlet hole, and an outlet that is formed by bending from the inlet and discharges the received air to contact the sterilized water stored in the water tank, and the inlet is further provided with a filter to filter out foreign substances contained in the received air.

[0031] In addition, the microplasma generator is characterized by delivering any one of ozone, nitrogen, carbon dioxide, and hydrogen peroxide to the water tank. Effects of the invention

[0032] The present invention, as described above, applies microplasma technology to generate oxidizing sterilized water using oxygen, removes odors by bringing air containing odors into contact with the oxidizing sterilized water, and has the effect of enabling resource recycling by supplying the sterilized water used for odor removal to the toilet flushing line for recycling.

[0033] In particular, the present invention has the effect of minimizing the cost and time required for maintenance by converting water into sterilized water, removing odors by exposing the converted sterilized water to air containing odors, and recycling the used sterilized water as toilet flushing water.

[0034] In addition, the present invention has the effect of delivering nano-bubbles to sterilized water to deeply deliver active oxygen generated by microplasma into the water and providing a long-lasting odor reduction function.

[0035] In addition, the present invention has the effect of maximizing odor reduction efficiency by transmitting ultrasound to sterilized water. Brief explanation of the drawing

[0036] FIG. 1 is an exemplary diagram illustrating a microplasma-based odor removal and sterilized water recycling system according to the present invention. FIG. 2 is an exemplary diagram illustrating a microplasma-based odor removal and sterilized water recycling system according to the present invention from a different angle. FIG. 3 is an exemplary diagram illustrating the arrangement of each component constituting the present invention. FIG. 4 is an exemplary diagram illustrating an inlet vent constituting the present invention. Specific details for implementing the invention

[0037] In addition to the above objectives, other objectives and features of the present invention will become apparent through the description of embodiments with reference to the accompanying drawings.

[0039] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0041] Hereinafter, a preferred embodiment of the odor removal and sterilization water recycling system according to the present invention will be examined in detail with reference to the attached drawings.

[0043] First, the microplasma-based odor removal and sterilized water recycling system (1) according to the present invention comprises: a body (10) in the form of a hollow enclosure having an air inlet (11) through which external air is introduced; a water tank (21) provided inside the body (10), formed in the form of an enclosure having a predetermined volume, including an inlet (211) through which water is introduced and a drain (212) through which stored water is drained; an odor adsorption and air purification unit (20) including an inlet vent (22) that transmits air introduced through the air inlet (11) to the water tank (21); a microplasma generation unit (30) provided inside the body (10) that converts stored water into sterilized water by transmitting OH radicals and reactive oxygen species (ROS) generated by performing plasma discharge based on oxygen to the water tank (21); and sterilized water stored in the water tank (21) provided inside the water tank (21). It includes an ultrasonic gas dissolving unit (40) that applies ultrasound to improve the solubility of odor components contained in the air.

[0045] The above body (10) is formed in the shape of a hollow enclosure, and each of the above components is placed inside, and may further be provided with an installation bracket (not shown) on the outer surface so as to be installed on a wall or floor surface.

[0046] The above body (10) is provided with an air inlet hole (11) through which external air is introduced. The air inlet hole (11) is provided in multiple numbers spaced apart from one another and is provided on multiple outer surfaces of the body (10) arranged in different directions.

[0048] The above odor adsorption and air purification unit (20) purifies the air by adsorbing odors contained in the air introduced through the air inlet port (11). To this end, it includes a water tank (21) in which sterilized water for odor purification is stored, and an inlet vent (22) that transmits the air introduced through the air inlet port (11) to the water tank (21) and brings it into contact with the stored sterilized water.

[0050] The above water tank (21) is configured to have a predetermined volume inside and stores a certain amount of water, and includes an inlet (211) for water to enter and a drain (212) for water to be drained.

[0051] This water tank (21) receives water from the inlet (211) to maintain a certain amount of water inside the water tank at all times. For example, when the odor removal and sterilization water recycling system (1) according to the present invention is installed in a restroom, the toilet washing water used for cleaning the toilet bowl is stored in the water tank (21).

[0052] Here, the amount of water stored in the water tank (21) may vary depending on the volume of the water tank, preferably an amount sufficient for at least two toilet flushes, but if the size of the water tank (21) is small, an amount sufficient for one toilet flush may also be stored.

[0053] In addition, the drain (212) provided in the above water tank (21) is connected to the toilet cleaning line, and by utilizing the sterilized water used for odor removal for toilet cleaning, water recycling is possible, thereby reducing resource waste.

[0054] That is, water used for cleaning the toilet is received and stored through the inlet (211), and the stored water is converted into sterilized water using the micro-plasma generator (30) described later to remove odors, and then the sterilized water is delivered to the toilet through the drain (212) for recycling.

[0055] Meanwhile, the above-mentioned inlet port (211) is connected to the micro-plasma generator (30) described later to perform micro-plasma discharge and transfer the generated OH radicals and active oxygen to the water tank (21), or a branch pipe (213) is provided to transfer the OH radicals and active oxygen to the outside. That is, the water tank (21) is fixed inside the body (10), but if necessary, water is stored in a separate enclosure outside and the OH radicals and active oxygen are transferred so that the sterilized water can be moved to a separate location or used for other purposes using a movable enclosure.

[0057] The above-mentioned inlet vent (22) transmits air introduced through the air inlet hole (11) to the water tank (21) to bring the air into contact with the sterilized water. To this end, the inlet vent (22) is formed in the shape of a hollow tubular body and includes an inlet port (221) that is positioned between the air inlet hole (11) of the body (10) and the water tank (21) to receive air that has passed through the air inlet hole (11), and an outlet port (222) that is formed by bending from the inlet port (221) and discharges the introduced air to bring it into contact with the sterilized water stored in the water tank (21).

[0058] Here, the inlet port (221) is positioned adjacent to the air inlet port (11) formed in the body (10) so that air introduced through the air inlet port (11) is drawn in, and then discharged through the outlet port (222) positioned toward the sterilized water stored in the water tank (21), thereby bringing the introduced air into contact with the sterilized water.

[0059] At this time, a filter (223) is further provided in the inlet (221) to filter out foreign substances contained in the incoming air, and it is preferable that the filter (223) be arranged so as to be replaceable, and there are no special limitations on the type of filter (223) as it can be changed according to the environment in which it is installed.

[0060] The unexplained reference numeral (50) in the drawing is an air conditioning motor (50) provided inside the body (10) and for transmitting suction pressure to the air inlet hole (11) formed in the body (10).

[0062] The above microplasma generator (30) performs oxygen-based plasma discharge on the water stored inside the water tank (21) to deliver OH radicals and reactive oxygen species (ROS) to the water tank (21) and convert the stored water into sterilized water, thereby converting ordinary water supplied for toilet cleaning into sterilized water through microplasma discharge.

[0063] Here, oxidizing disinfectant water is a water-based disinfectant water with strong oxidizing power, and typical examples include hypochlorous acid water, ozone water, and hydrogen peroxide water. These are used to sterilize bacteria, viruses, fungi, etc., by dissolving or activating an oxidizing agent in water.

[0064] This oxidizing disinfectant water has a high oxidation-reduction potential (ORP), rapidly destroying bacteria, viruses, fungi, and biofilms, and oxidizing cell membrane lipids, proteins, and nucleic acids to kill microorganisms and eliminate odor molecules contained in the air.

[0065] In addition, it is effective in sterilizing not only general bacteria but also viruses such as norovirus, influenza, and coronavirus, and is relatively effective against antibiotic-resistant bacteria. It also has the characteristics of low residual toxicity to the human body or the environment at diluted concentrations, and leaves a low residue burden as it mostly decomposes into water, oxygen, and salts after use.

[0066] In addition, it can be produced and used immediately on-site using an electrolytic water generator or an ozone generator, ensuring high freshness; although it exhibits volatility and instability, it possesses characteristics that eliminate the risk of flammability and explosion when used at diluted concentrations.

[0067] This oxidizing disinfectant water is highly effective in removing odors by oxidizing and decomposing hydrogen sulfide, ammonia, volatile organic compounds, etc.

[0068] In the present invention, a micro-plasma discharge based on oxygen is performed on water stored in a water tank (21) to deliver OH radicals and active oxygen, thereby converting it into sterilized water. The micro-plasma generating unit (30) for this purpose includes a micro-plasma unit (31) that receives oxygen or air to generate micro-plasma, a nano-bubble generator (32) for dispersing active oxygen species generated in the micro-plasma unit (31) in the form of micro-bubbles, and a controller (33) that controls the micro-plasma unit (31) and the nano-bubble generator (32) to control the plasma generation conditions and the amount of nano-bubbles generated.

[0069] Here, powerful active oxygen is generated through the micro plasma section (31), and the active oxygen generated by the nanobubbles is delivered deep and for a long time into the water to extend the duration of the sterilization effect.

[0070] That is, when the micro plasma unit (31) performs a micro plasma discharge based on oxygen to generate OH radicals and active oxygen, the nano bubble generator (32) operates to capture them inside and on the surface of the generated nano bubbles, and delivers them to the depth of the water stored in the water tank (21) to increase the mass transfer rate and increase the dissolved concentration.

[0071] In addition, nanobubbles dispersed in water help the plasma discharge inside the bubbles, and in doing so, the interfacial reaction volume increases and the discharge becomes more uniform.

[0072] Here, the controller (33) controls the micro plasma unit (31) and the nano bubble generator (32) to automatically adjust the plasma generation conditions and the amount of nano bubbles generated.

[0073] Meanwhile, in addition to OH radicals and active oxygen, the micro plasma section (31) may generate any one of ozone, nitrogen, carbon dioxide, and hydrogen peroxide and deliver it into the water. The ozone, nitrogen, carbon dioxide, and hydrogen peroxide may be selected depending on the location or environment where the micro plasma-based odor removal and sterilization water recycling system according to the present invention is installed.

[0074] The water stored in the water tank (21) is converted into oxidized sterilized water through the above-mentioned micro-plasma generator (30), and the converted sterilized water is delivered into the water using nano-bubbles so that the sterilization effect can be sustained for a longer period.

[0076] The above ultrasonic gas dissolving unit (40) applies ultrasound to the sterilized water stored in the water tank (21) to improve the solubility of odor substances contained in the air in the sterilized water.

[0077] The ultrasonic gas dissolving unit (40) for this purpose is provided inside the water tank (21) and is configured to deliver any one of ultrasonic waves, a fine spray nozzle, or a mist to the sterilized water.

[0078] In this case, when ultrasound is applied, ultrasound having a frequency of 20 kHz to 2 MHz is transmitted to the sterilized water stored in the water tank (21), and odorous substances are decomposed or dissolved in the sterilized water using the cavitation phenomenon.

[0079] This ultrasonic gas dissolving unit (40) transmits ultrasonic waves to the sterilized water, thereby shortening the time for the odor of the air introduced into the sterilized water to dissolve in the sterilized water and enabling it to be done efficiently.

[0080] Looking at this in more detail, it utilizes ultrasonic cavitation, acoustic streaming, and oxidizing agent activation. When the cavitation bubbles collapse, a localized “micro hot spot” of approximately ~5,000 K and ~1,000 atm is created, and additional highly reactive radicals such as OH are generated, and this process increases the oxidizing power of the oxidizing disinfectant water.

[0081] In particular, when ozone (sono-ozonation) is used with ultrasound, ozone decomposition is accelerated, conversion to OH radicals increases, and gas-liquid transfer (kLa) also increases; hydrogen peroxide (H₂O₂) is also combined with ultrasound, OH generation is amplified, and chlorine / HOCl is generated as chlorine radicals (RCS) by ultrasound, thereby promoting selective oxidation and chlorination.

[0082] Furthermore, ultrasound-induced microcurrents thin the liquid-solid / liquid-gas boundary layer and enhance mixing, causing malodorous substances and oxidizers to come into contact more frequently and quickly, which allows for higher throughput or shorter residence times over the same period.

[0083] Furthermore, local shear and micro-jets generated by cavitation physically break down surface contamination layers and biofilms, increasing accessibility to odor precursors and oxidative reactivity.

[0084] Therefore, if nanobubbles are already present in the oxidized disinfectant water, they act as cavitation nuclei to lower the cavitation critical pressure, causing them to burst easily and increasing the radical generation density; this shortens the odor reduction time and allows for the expectation of a high odor reduction effect even with a short residence time.

[0085] Meanwhile, when ultrasound is applied, ultrasound with a frequency of 20 kHz to 2 MHz is applied, but when the frequency is 20 kHz or lower, there is a problem that physical destruction of nanobubbles does not occur easily, and when the frequency is 2 MHz or higher, the radical yield increases, so nanobubbles are destroyed even in situations where no odor is introduced, so there is a problem that odor reduction effect cannot be expected.

[0086] Therefore, by transmitting ultrasound to the sterilized water to generate radicals, thin the boundary layer, and ensure proper surface destruction, odor removal by the sterilized water is achieved with higher efficiency in a shorter time.

[0088] As described above, the present invention has been explained by specific details such as specific components, limited embodiments, and drawings; however, this is provided merely to aid in a more comprehensive understanding of the invention, and the invention is not limited to the above embodiments. A person skilled in the art can make various modifications and variations from this description.

[0090] Accordingly, the scope of the present invention should not be limited to the described embodiments, and all things equivalent to or having equivalent variations to the claims set forth below, as well as the claims set forth below, shall be considered to fall within the scope of the concept of the present invention. Explanation of the symbols

[0092] 1: Microplasma-based odor removal and sterilized water recycling system 10 : Body 11: Air inlet 20: Air purification unit 21 : Water tank 22 : Inlet vent 211 : Inlet 212 : Drain 213 : Branch 221 : Inlet 222 : Outlet 223 : Filter 30: Microplasma generator 31: Microplasma section 32 : Nano bubble generator 33 : Controller 40: Ultrasonic gas dissolution section 50 : Air conditioning motor

Claims

Claim 1 A body (10) in the form of a hollow enclosure, provided with an air inlet port (11) through which external air is introduced; a water tank (21) provided inside the body (10), formed in the form of an enclosure having a predetermined volume, and including an inlet port (211) through which water is introduced and a drain port (212) through which stored water is drained, and an odor adsorption and air purification unit (20) including an inlet vent (22) that transmits air introduced through the air inlet port (11) to the water tank (21); a micro-plasma generation unit (30) provided inside the body (10) that converts stored water into sterilized water by transmitting OH radicals and reactive oxygen species (ROS) generated by performing plasma discharge based on oxygen to the water tank (21); and an ultrasonic gas dissolution unit (40) provided inside the water tank (21) that improves the solubility of odor components contained in the air by applying ultrasound to the sterilized water stored in the water tank (21). A microplasma-based odor removal and sterilization water recycling system characterized by the following. Claim 2 A microplasma-based odor removal and sterilization water recycling system according to claim 1, wherein the microplasma generation unit (30) comprises a microplasma unit (31) that receives oxygen or air to generate microplasma, a nanobubble generator (32) for dispersing active oxygen species generated in the microplasma unit (31) in the form of microbubbles, and a controller (33) that controls the microplasma unit (31) and the nanobubble generator (32) to control plasma generation conditions and the amount of nanobubbles generated. Claim 3 A microplasma-based odor removal and sterilized water recycling system according to claim 1, wherein the ultrasonic gas dissolving unit (40) transmits ultrasonic waves having a frequency of 20 kHz to 2 MHz to the sterilized water stored in the water tank (21) and decomposes or dissolves odorous substances in the sterilized water using a cavitation phenomenon. Claim 4 A microplasma-based odor removal and sterilization water recycling system according to any one of claims 1 to 3, characterized in that the drain (212) of the water tank (21) is connected to a toilet flushing water supply line to recycle sterilization water in which odor substances are dissolved as toilet flushing water. Claim 5 A micro-plasma-based odor removal and sterilized water recycling system according to claim 1, wherein the inlet vent (22) is formed in the shape of a hollow tubular body and includes an inlet port (221) disposed between the air inlet port (11) of the body (10) and the water tank (21) through which air passing through the air inlet port (11) is introduced, and an outlet port (222) formed by bending from the inlet port (221) to discharge the introduced air so as to come into contact with the sterilized water stored in the water tank (21), and further provided in the inlet port (221) with a filter (223) for filtering out foreign substances contained in the introduced air.

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