Malodor abatement system

Abstract

The malodor abatement system according to an embodiment of the present invention includes: a pretreatment tank, which is connected to a fermentation facility and removes coarse dust contained in odorous components flowed in from the fermentation facility through an inlet pipe; a plurality of plasma-reactive malodor degradation and removal tanks, including a plasma generator for generating plasma and a reaction tank for removing major malodors from the odorous components, from which the coarse dust has been removed, by using the plasma; and an ozone removal tank for removing ozone and residual malodors from the odorous components, from which the major malodors have been removed, through ozone treatment.

Description

Odor reduction system

[0001] Embodiments of the present invention relate to an odor reduction system and method, and more particularly, to an odor reduction system that can increase the odor reduction efficiency of a fermentation facility without a scrubber based on plasma reaction odor decomposition.

[0002] To date, most liquid fertilizers have been produced through a series of processes, including simple storage, anaerobic fermentation, and aerobic fermentation, followed by a period of composting before conversion into liquid fertilizer. However, during this process, odor-causing substances such as ammonia, hydrogen sulfide, and amines, both present in the livestock manure itself and emitted during the anaerobic fermentation process, have caused complaints from neighbors and caused discomfort to workers, fostering a rejection of liquid fertilizer production facilities for aesthetic reasons rather than for their efficacy.

[0003] The odor components generated in the above liquid fertilizer production method are ammonia, hydrogen sulfide, amines, etc., which are odor components generated from livestock manure itself or from anaerobic and aerobic fermentation processes. The ammonia, hydrogen sulfide, amines, etc. are in very high concentrations, and in particular, ammonia and hydrogen sulfide are inorganic compounds and have the characteristic of not being removed by methods such as deterioration, carbonization, or catalytic oxidation. Therefore, there is a problem in that separate treatment facilities such as chemical treatment and biological treatment (biofilter) must be installed to treat them.

[0004] In addition, the above ammonia and hydrogen sulfide are gases with high solubility in water and can be significantly removed by wet cleaning, but there was a problem that the amount of wastewater generated increased, requiring the addition of separate wastewater treatment facilities. In particular, ammonia is a basic gas that dissolves well in acids but not well in bases, and hydrogen sulfide, on the contrary to ammonia, does not dissolve in acids but has a very high solubility in bases. Therefore, when selecting a chemical treatment method, it was necessary to select a process that took into account the physical and chemical properties of these two gases.

[0005] One embodiment of the present invention provides an odor reduction system capable of efficiently reducing odor in a fermentation facility without a scrubber by discharging clean air after ozone treatment in an ozone removal tank following multi-stage plasma treatment through a plurality of plasma reaction odor decomposition and removal tanks.

[0006]

[0007] The problems to be solved by the present invention are not limited to the problem(s) mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0008] An odor reduction system according to one embodiment of the present invention includes a pretreatment tank connected to a fermentation facility and removing coarse dust included in odor components flowing in from the fermentation facility through an inlet pipe; a plurality of plasma reaction odor decomposition and removal tanks including a plasma generator that generates plasma, and a reaction tank that removes a main odor from the odor components from which the coarse dust has been removed using the plasma; and an ozone removal tank that removes residual odor and ozone from the odor components from which the main odor has been removed through ozone treatment, wherein the plasma generator may be provided with a plurality of discharge pipes extending into each stage of the reaction tank and supplying plasma into each stage.

[0009] The above pretreatment tank is composed of a Chevron-type inertial filter, and the coarse dust can be removed through the inertial filter.

[0010] The above reactor is composed of an odd number of stages including three or five stages, and can remove the main odors including ammonia and hydrogen sulfide as they pass through each stage.

[0011] The above reaction tank is formed so that each stage is separated by a partition wall, and passages through which the odorous component can pass may be arranged in a cross pattern on opposite sides of the partition wall.

[0012] The above reactor can be manufactured by considering at least one of the flue length, flue cross-sectional area, wind speed, and residence time according to the plasma generation amount of the plasma generator.

[0013] The above plurality of discharge pipes can be arranged in a zigzag manner, cross-wise, in each stage based on the cross-section of the reactor.

[0014] The above plurality of discharge pipes have a pair of discharge ports that radiate plasma in a direction perpendicular to the direction of movement of the odorous gas, and the pair of discharge ports are formed in opposite directions and can be arranged in a zigzag manner along the direction of movement of the odorous gas.

[0015] The above pair of discharge ports may have a major axis length of less than half the length of the discharge pipe in the reactor.

[0016] The plasma generator includes a plurality of plasma generating modules that generate plasma, and the plasma generating modules correspond one-to-one to the discharge pipe so as to supply plasma to the reaction tank.

[0017] The above ozone removal tank can remove residual odors and ozone, including ammonia, through ozone treatment using a high-efficiency activated carbon catalyst filter, thereby discharging clean air having a concentration below the legal standard.

[0018] The odor reduction system according to one embodiment of the present invention may further include a blower fan for moving gas discharged after plasma treatment from the rearmost of the plurality of plasma reaction odor decomposition and removal tanks to the ozone removal tank.

[0019]

[0020] Specific details of other embodiments are included in the detailed description and accompanying drawings.

[0021] According to one embodiment of the present invention, by discharging clean air after ozone treatment in an ozone removal tank following multi-stage plasma treatment through a plurality of plasma reaction odor decomposition and removal tanks, the odor of a fermentation facility can be efficiently reduced without a scrubber, thereby reducing maintenance costs.

[0022] FIG. 1 is a block diagram illustrating an odor reduction system according to one embodiment of the present invention.

[0023] Figure 2 is a cross-sectional side view of a reaction tank applied to one embodiment of the present invention.

[0024] Figure 3 is a cross-sectional view taken along line A-A' of Figure 2.

[0025] Figure 4 is a plan view of a reaction tank and a plasma generator applied to one embodiment of the present invention.

[0026] Figure 5 is a plan view, side view, and cross-sectional view of the discharge pipe.

[0027] Fig. 6 is a drawing illustrating an example of a high-efficiency activated carbon catalyst filter applied to the ozone removal tank of Fig. 1.

[0028] Figure 7 is a flowchart illustrating an odor removal process according to one embodiment of the present invention.

[0029] With respect to the embodiments of the present invention disclosed in the text, specific structural and functional descriptions are merely illustrative for the purpose of explaining the embodiments of the present invention, and the embodiments of the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described in the text.

[0030] The present invention is susceptible to various modifications and takes various forms. Specific embodiments are illustrated in the drawings and described in detail herein. However, this is not intended to limit the invention to specific disclosed forms, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0031] While terms like "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms may be used to distinguish one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a "second component," and similarly, a second component may also be referred to as a "first component."

[0032] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components in between. Conversely, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions that describe the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

[0033] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprises" or "has" indicate the presence of a described feature, number, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0034] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning within the context of the relevant technology, and shall not be construed in an idealized or overly formal sense unless explicitly defined herein.

[0035] Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. Identical components in the drawings are designated by the same reference numerals, and redundant descriptions of identical components are omitted.

[0036] FIG. 1 is a block diagram illustrating an odor reduction system according to one embodiment of the present invention.

[0037] Referring to FIG. 1, an odor reduction system (100) according to one embodiment of the present invention may be configured to include a pretreatment tank (110), a first plasma reaction odor decomposition and removal tank (120), a second plasma reaction odor decomposition and removal tank (130), a blower fan (140), and an ozone removal tank (150).

[0038] The above pretreatment tank (110) may be configured to be connected to a fermentation facility (101). Here, the fermentation facility (101) may include any facility that generates an unpleasant odor due to fermented substances, such as an organic fertilizer plant or a livestock farm.

[0039] The above pretreatment tank (110) may be equipped with an inlet pipe for connection with the fermentation facility (101). Accordingly, odorous gas may be introduced from the fermentation facility (101) into the pretreatment tank (110) through the inlet pipe.

[0040] The above pretreatment tank (110) can remove coarse dust contained in the odorous gas flowing in from the fermentation facility (101) through the inlet pipe. To this end, the above pretreatment tank (110) can be configured with a Chevron-type inertial filter.

[0041] That is, the pretreatment tank (110) can remove coarse dust from the odorous gas flowing in from the fermentation facility (101) through the inlet pipe by filtering it through the chevron-type inertial filter.

[0042] For reference, the above chevron-type inertial filter (not shown) has vertically installed blades, and when coarse dust flowing in from the fermentation facility (101) enters these blades (hook-shaped: blades), it hits the blades due to inertial rotation and centrifugal force, falls in the direction of gravity, and is collected at the bottom of the pretreatment tank (110).

[0043] The first plasma reaction odor decomposition and removal tank (120) may be configured to be connected to the pretreatment tank (110). Accordingly, the odor gas from which the coarse dust has been removed from the pretreatment tank (110) may be introduced into the first plasma reaction odor decomposition and removal tank (120).

[0044] The above first plasma reaction odor decomposition and removal tank (120) may be configured to include a first plasma generator (PG-1) (121) that generates plasma, and a first reaction tank (RC-1) (122) that removes the main odor from the odor components from which the coarse dust has been removed using the plasma.

[0045] Fig. 2 is a cross-sectional view of a reactor applied to one embodiment of the present invention. Fig. 3 is a cross-sectional view taken along line A-A' of Fig. 2.

[0046] Referring to FIGS. 2 and 3, the first reactor (122) is configured with an odd number of stages including 3 or 5 stages, and as the odorous gas passes through each stage, the main odors including ammonia and hydrogen sulfide can be removed.

[0047] For example, the first reactor (122) may be implemented as a three-stage reactor as shown in FIGS. 2 and 3. The first reactor (122) may be formed such that each stage (124, 125, 126) is separated by a partition wall, and passages (128, 129) through which the odorous component can pass may be arranged crosswise on opposite sides of the partition wall.

[0048] The first reaction tank (122) may be equipped with a plurality of inspection ports (127) for inspecting the inside of the reaction tank.

[0049] The first reactor (122) may be manufactured by considering at least one of the flue length, flue cross-sectional area, wind speed, and residence time according to the plasma generation amount of the first plasma generator (121). For example, the first reactor (122) may have a flue length of 17.5 m and a flue cross-sectional area of ​​0.42 m. 2 , wind speed: 19.9 m / s, residence time: 0.879 s, etc. can be manufactured to satisfy the conditions.

[0050] Fig. 4 is a plan view of a reactor and a plasma generator applied to one embodiment of the present invention. Fig. 5 is a plan view, side view, and cross-sectional view of a discharge pipe.

[0051] Figure 5 (A) is a plan view of the discharge pipe (123) as viewed from above, and Figure 5 (B) is a side view of the discharge pipe (123) as viewed from the side. Figure 5 (C) is a cross-sectional view of the discharge pipe (123) cut along the line BB'.

[0052] Referring to FIGS. 4 and 5, the first plasma generator (121) may be provided with a plurality of discharge pipes (123) that extend inside each stage (124, 125, 126) of the first reactor (122) to supply plasma inside each stage (124, 125, 126).

[0053] A plurality of discharge pipes (123) can be arranged in a zigzag pattern in each stage (124, 125, 126) based on the cross section of the first reactor (122).

[0054] The plurality of discharge tubes (123) may be provided with a pair of discharge ports (123a, 123b) that radiate plasma in a direction perpendicular to the direction of movement of the malodorous gas. The plasma radiated in a direction perpendicular to the direction of movement of the malodorous gas can impede the movement of the malodorous gas. This increases the contact time between the malodorous gas and the plasma, thereby enhancing the malodor removal effect.

[0055] A pair of discharge ports (123a, 123b) may be formed in opposite directions. According to one embodiment illustrated in (C) of FIG. 5, one discharge port (123a) may be formed at the upper portion of the pipe, and the other discharge port (123b) may be formed at the lower portion of the pipe. This allows the plasma emitted from the discharge ports to impede the movement of odorous gas passing up and down the discharge pipe, thereby increasing the contact time between the odorous gas and the plasma.

[0056] A pair of outlets (123a, 123b) may be arranged in a zigzag pattern along the direction of movement of the odorous gas. In one embodiment, a pair of outlets (123a, 123b) may be arranged alternately left and right along the direction of movement of the odorous gas.

[0057] For example, a discharge pipe with its outlet positioned on the left may be sequentially arranged followed by a discharge pipe with its outlet positioned on the right. Alternatively, two discharge pipes with their outlet positioned on the left may be sequentially arranged followed by two discharge pipes with their outlet positioned on the right.

[0058] By placing a pair of outlets (123a, 123b) in a cross-like manner, the plasma radiated from the outlets can obstruct the movement of the odorous gas, and the contact time between the odorous gas and the plasma can be increased.

[0059] A pair of discharge ports (123a, 123b) may be formed such that the short axis of the discharge ports is smaller than the diameter of the discharge tube. The discharge ports may be formed in a long rectangular or oval shape along the extension direction of the discharge tube (123), but the shape of the discharge ports is not limited thereto.

[0060] The short axis length of the discharge port should be smaller than the diameter of the discharge tube, and may be, for example, less than half the diameter of the discharge tube. By forming the short axis length of the discharge port smaller than the diameter of the discharge tube, the plasma radiated through the discharge port can have a pressure and flow rate that can impede the movement of odorous gases.

[0061] According to one embodiment of the present invention, the major axis length of a pair of discharge ports (123a, 123b) must be shorter than the length of the discharge pipe within the reactor, and may be formed to be less than half the extended length of the discharge pipe. By forming the major axis length of the discharge port to be shorter than the extended length of the discharge pipe, the plasma radiated through the discharge port can have a pressure and flow rate capable of impeding the movement of malodorous gas.

[0062] For example, a plurality of discharge pipes (123) may be implemented such that each pipe diameter is 150 mm and the size of the plasma discharge port (123a, 123b) connected to each of the discharge pipes (123) is 400 (w) * 75 (h) mm.

[0063] Meanwhile, the plasma generator may include a plurality of plasma generating modules that generate plasma. For example, the plasma generator may be composed of 12 plasma generating modules.

[0064] The plasma generation module can supply plasma to the reactor by corresponding to the discharge pipe (123) in a one-to-one manner. By connecting one plasma generation module to one discharge pipe, the plasma radiated from the discharge port can have sufficient pressure and flow rate to impede the movement of odorous gases.

[0065] The second plasma reaction odor decomposition and removal tank (130) may be configured to include a second plasma generator (131) that generates plasma, and a second reaction tank (132) that removes the main odor from the odor gas from which the coarse dust has been removed using the plasma.

[0066] Here, the second reaction tank (132) is configured with an odd number of stages including three or five stages, and the main odors including ammonia and hydrogen sulfide can be removed as the odor gas passes through each stage.

[0067] For example, the second reactor (132) may be implemented as a three-stage reactor, similar to the first reactor (122) illustrated in FIGS. 2 and 3. The second reactor (132) may be formed such that each stage (124, 125, 126) is separated by a partition wall, and passages (128, 129) through which the odorous component can pass may be arranged crosswise on opposite sides of the partition wall.

[0068] The second reactor (132) may be manufactured by considering at least one of the flue length, flue cross-sectional area, wind speed, and residence time according to the plasma generation amount of the first plasma generator (131). For example, the second reactor (132) may have a flue length of 3 m and a flue cross-sectional area of ​​1.8 m. 2 , wind speed: 4.6 m / s, residence time: 0.776 s, etc. can be manufactured to satisfy the conditions.

[0069] Referring to FIGS. 4 and 5, the second plasma generator (131) may be provided with a plurality of discharge pipes (123) that extend inside each stage (124, 125, 126) of the second reactor (132) to supply plasma inside each stage (124, 125, 126).

[0070] The above plurality of discharge pipes (123) may be arranged in a zigzag manner in each stage (124, 125, 126) based on the cross section of the second reactor (132). In addition, the above plurality of discharge pipes (123) may be implemented such that, for example, each of their diameters is 150 mm and the size of the plasma discharge ports (123a, 123b) connected to each of the discharge pipes (123) is 400 (w) * 75 (h) mm.

[0071] In this embodiment, two plasma generators (121, 131) and three-stage reactors (122, 132) are provided in pairs, but this is not limited to this and various implementations are possible, such as providing a greater number of reactors.

[0072] The blower fan (140) may serve to move the gas discharged after plasma treatment from the rearmost one among the plurality of plasma reaction odor decomposition and removal tanks (120, 130) to the ozone removal tank (150). That is, the blower fan (140) may drive the fan (e.g., 40 hp) to move the odor gas discharged after plasma treatment from the second reaction tank (132) to the ozone removal tank (150).

[0073] Fig. 6 is a drawing illustrating an example of a high-efficiency activated carbon catalyst filter applied to the ozone removal tank of Fig. 1.

[0074] Referring to Fig. 6, the ozone removal tank (150) can remove residual odor and ozone from the odorous gas from which the main odor has been removed through ozone treatment. To this end, the ozone removal tank (150) can be equipped with a high-efficiency activated carbon catalyst filter, as illustrated in Fig. 6.

[0075] Here, the high-efficiency activated carbon catalyst filter is a filter that utilizes the principle of removing ozone and residual odors (ammonia) by passing them through a granular layer. The ozone removal tank (150) can remove residual odors and ozone, including ammonia, through ozone treatment using the high-efficiency activated carbon catalyst filter, thereby discharging clean air having a concentration below the legal standard.

[0076] The odor reduction effect according to one embodiment of the present invention was tested as follows. For the 1st to 3rd tests (1-stage reactor), the test period was from 2022.11.04. to 2022.12.20., and the temperature was -7.9 to 10.3 degrees Celsius. For the 4th and 5th tests (pretreatment room), the test period was from 2023.02.27. to 2023.03.02., and the temperature was -4.4 to 12.8 degrees Celsius. For the 6th test (5-stage reactor), the test period was from 2023.04.07., and the temperature was 9 to 13 degrees Celsius.

[0077] First, in the case of hydrogen sulfide (H2S) and volatile organic compounds (TVOC), the concentration values ​​of hydrogen sulfide (H2S) and volatile organic compounds (TVOC) before treatment in the 4th and 5th tests were 0.18 to 0.45 ppm and 3.35 to 7.74 ppm, respectively, but after treatment, the concentration values ​​of hydrogen sulfide (H2S) and volatile organic compounds (TVOC) were 0.00 ppm and 0 to 0.3 ppm, respectively, which was a 100% and 96 to 100% reduction, respectively.

[0078] Also, in the 6th test, the concentrations of hydrogen sulfide (H2S) and volatile organic compounds (TVOC) before treatment were 0.22~0.31ppm and 2.78~4.29ppm, respectively, but after treatment, the concentrations of hydrogen sulfide (H2S) and volatile organic compounds (TVOC) were reduced by 100% and 89.3~100%, respectively, to 0.00ppm and 0~0.46ppm. For reference, the target value is to reduce the concentrations of hydrogen sulfide (H2S) and volatile organic compounds (TVOC) by 100% from 0.45ppm and 7.74ppm before treatment to 0.00ppm and 0.00ppm after treatment.

[0079] Next, in the case of ammonia (NH3), the concentration before treatment was 34.4~55.4ppm in the 1st to 3rd tests, but the concentration after treatment was 26.6~37.2ppm, a reduction of 21.8~45.4%. In addition, in the 4th and 5th tests, the concentration before treatment was 50~70ppm, but the concentration after treatment was 25.3~38.1ppm, a reduction of 45.6~49.4%.

[0080] Also, in the 6th test, the concentration of ammonia (NH3) before treatment was 108.9~124.6ppm, but after treatment, the concentrations were reduced by 49.3% (20hp), 45.1% (30hp), and 30.2% (40hp), respectively, to 63.2ppm, 46.8ppm, and 76ppm. For reference, the target value is to reduce the concentration of ammonia (NH3) by 70~80% from 100~130ppm before treatment to less than 30ppm after treatment.

[0081] Figure 7 is a flowchart illustrating an odor removal process according to one embodiment of the present invention.

[0082] Referring to FIG. 7, in step (710), the pretreatment tank (110) of the odor reduction system (100) can remove coarse dust contained in the odor gas flowing in from the fermentation facility (101).

[0083] Next, in step (720), the plasma generator (121, 131) of the odor reduction system (100) can generate plasma.

[0084] Next, in step (730), the reaction tank (122, 132) of the odor reduction system (100) can remove the main odor from the odor gas from which the coarse dust has been removed using the plasma.

[0085] Next, in step (740), the blower fan (140) of the odor reduction system (100) can move the gas discharged after plasma treatment to the ozone removal tank (150).

[0086] Next, in step (750), the ozone removal tank (150) of the odor reduction system (100) can remove residual odor and ozone from the odor gas from which the main odor has been removed through ozone treatment.

[0087]

[0088] Although the embodiments described above have been described by way of limited examples and drawings, those skilled in the art will appreciate that various modifications and variations can be made based on the above teachings. For example, appropriate results can still be achieved even if the described techniques are performed in a different order than described, and / or components of the described systems, structures, devices, circuits, etc. are combined or combined in a different manner than described, or are replaced or substituted with other components or equivalents.

[0089] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims set forth below.

[0090] An odor reduction system according to one embodiment of the present invention includes a pretreatment tank connected to a fermentation facility and removing coarse dust included in odor components flowing in from the fermentation facility through an inlet pipe; a plurality of plasma reaction odor decomposition and removal tanks including a plasma generator that generates plasma, and a reaction tank that removes a main odor from the odor components from which the coarse dust has been removed using the plasma; and an ozone removal tank that removes residual odor and ozone from the odor components from which the main odor has been removed through ozone treatment, thereby efficiently reducing odor in a fermentation facility without a scrubber.

Claims

1. A pretreatment tank connected to a fermentation facility and removing coarse dust contained in odorous gas flowing from the fermentation facility through an inlet pipe; A plurality of plasma reaction odor decomposition and removal tanks including a plasma generator that generates plasma, and a reaction tank that removes the main odor from the odorous gas from which the coarse dust has been removed using the plasma; and It includes an ozone removal tank that removes residual odor and ozone from the odorous gas from which the main odor has been removed through ozone treatment. An odor reduction system characterized in that the plasma generator is provided with a plurality of discharge pipes extending inside each stage of the reactor to supply plasma inside each stage.

2. In paragraph 1, The above pretreatment tank An odor reduction system comprising a Chevron-type inertial filter and characterized in that the coarse dust is removed through the inertial filter.

3. In paragraph 1, The above reaction tank An odor reduction system comprising an odd number of stages including three or five stages, characterized in that the main odors including ammonia and hydrogen sulfide are removed as they pass through each stage.

4. In paragraph 3, The above reaction tank An odor reduction system characterized in that each of the above stages is formed to be separated by a partition wall, and passages through which the odorous gas can pass are arranged in a cross pattern on opposite sides of the partition wall.

5. In paragraph 1, The above reaction tank An odor reduction system characterized in that it is manufactured by considering at least one of the flue length, flue cross-sectional area, wind speed, and residence time according to the plasma generation amount of the plasma generator.

6. In paragraph 1, An odor reduction system characterized in that the plurality of discharge pipes are arranged in a zigzag pattern, cross-sectionally, in each stage based on the cross-section of the reactor.

7. In paragraph 1, The above plurality of discharge tubes have a pair of discharge ports that radiate plasma in a direction perpendicular to the direction of movement of the odorous gas, An odor reduction system characterized in that the pair of discharge ports are formed in opposite directions and are arranged in a zigzag pattern along the direction of movement of the odorous gas.

8. In paragraph 7, An odor reduction system, wherein the pair of discharge ports has a major axis length of less than half the length of the discharge pipe in the reactor.

9. In paragraph 1, An odor reduction system characterized in that the plasma generator includes a plurality of plasma generation modules that generate plasma, and the plasma generation modules correspond one-to-one to the discharge pipe to supply plasma to the reaction tank.

10. In paragraph 1, The above ozone removal tank An odor reduction system characterized by removing residual odors and ozone, including ammonia, through ozone treatment using a high-efficiency activated carbon catalyst filter, thereby discharging clean air having a concentration below the legal standard.

11. In paragraph 1, A blower fan for moving the gas discharged after plasma treatment from the rearmost of the plurality of plasma reaction odor decomposition and removal tanks to the ozone removal tank. An odor reduction system characterized by further including:

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