Odorous Gas Removal Apparatus Using Multi-stage Microbial Carriers

Abstract

The present invention comprises: a circulating water management unit (100) in which circulating water at a constant temperature is stored and which supplies and circulates the stored circulating water; a chemical solution management unit (200) connected to the circulating water management unit (100) and which injects a chemical solution to control the concentration (pH) of the circulating water; a gas supply unit (300) that sucks in and supplies malodorous gas generated from a facility to be treated; an ammonia gas removal unit (400) that receives malodorous gas from the gas supply unit (300) and removes ammonia gas contained in the malodorous gas using Rhodobacter sphaeroides microorganisms; and a hydrogen sulfide gas removal unit (500) configured above the ammonia gas removal unit (400) and removes hydrogen sulfide gas contained in the malodorous gas using Thiobacillus microorganisms. The present invention provides a wastewater treatment facility odor gas removal device using a multi-stage microbial carrier comprising: a methyl mercaptan removal unit (600) configured on the upper part of the hydrogen sulfide gas removal unit (500) and removing methyl mercaptans contained in the odor gas using Pseudomonas microorganisms; a gas discharge unit (700) for discharging gas from which the odor gas has been removed; and a control unit (800) for controlling the operation of the odor gas removal device.

Description

Technology Field

[0001] The present invention relates to an odor gas removal device for a wastewater treatment facility using a multi-stage microbial carrier, and more specifically, to an odor gas removal device for a wastewater treatment facility using a multi-stage microbial carrier that can provide high deodorization efficiency by removing complex odor gases including ammonia, hydrogen sulfide, and methyl mercaptan in stages by passing them through a microbial carrier layer optimized for each component. Background Technology

[0003] In general, large amounts of odors are generated in processes such as raw water, sludge, dewatered cake, anaerobic digestion gas, grit chambers, and thickening tanks at sewage and wastewater treatment plants and various organic waste treatment facilities. These odors are typically emitted as multi-component mixtures rather than consisting of a single component; representative examples include the complex presence of nitrogen-based odors (ammonia), sulfur-based odors (hydrogen sulfide, mercaptans), and other volatile organic compounds. In particular, hydrogen sulfide is highly irritating and poses a significant risk upon exposure to high concentrations; furthermore, due to its extremely low permissible odor limit, complaints can easily arise even from trace residuals.

[0004] Odor gas treatment technologies based on conventional methods are broadly classified into physical, chemical, and biological treatments. Among physical treatments, washing methods using water or absorbent liquids in packed towers or spray towers, and adsorption methods using activated carbon, zeolites, etc., are widely known.

[0005] However, while conventional washing methods may be effective for highly soluble components such as hydrogen sulfide, absorption efficiency is prone to fluctuate in sites with large changes in odor component composition or large fluctuations in gas flow rate, and management of the absorption solution (concentration, pH, sludge / salt accumulation, etc.) is required.

[0006] In addition, while adsorption methods based on conventional technology can be expected to have high removal efficiency with a relatively simple device, they have problems such as high costs for replacing adsorbents and the burden of regeneration processes, as well as increased operating costs when treating high concentrations and high flow rates.

[0007] In contrast, biological deodorization methods using microorganisms (biofilters) have the advantages of being environmentally friendly and economical. However, conventional biological deodorization methods have had problems, such as reduced overall removal efficiency due to competition among microorganisms dominant to specific gases when attempting to treat multiple gases simultaneously within a single reactor, or the inhibition of ammonia removal microorganism activity caused by a decrease in pH due to acidic substances generated during hydrogen sulfide oxidation.

[0008] The background technology or prior art mentioned herein is intended only to aid in understanding the technical significance of the present invention and does not refer to technology widely known in the technical field to which this invention belongs prior to the filing of the present invention. Prior art literature

[0010] Republic of Korea Registered Patent No. 10-1951633 Republic of Korea Registered Utility Model No. 20-0403396 Republic of Korea Registered Patent No. 10-1744023 Republic of Korea Registered Patent No. 10-2221717 The problem to be solved

[0011] In order to solve such problems, the present invention was devised based on the aforementioned background technology, and aims to provide a wastewater treatment facility odor gas removal device using a multi-stage microbial carrier that can provide high deodorization efficiency by removing complex odor gases including ammonia, hydrogen sulfide, and methyl mercaptan in stages by passing them through a microbial carrier layer optimized for each component.

[0012] In addition, the present invention aims to provide an odor gas removal device for wastewater treatment facilities using a multi-stage microbial carrier that can automatically control the temperature, humidity, and pH inside the reactor to maintain the activity of microorganisms in an optimal state and maintain stable deodorization performance even under changes in the external environment.

[0013] In addition, the present invention aims to provide an odor gas removal device for a wastewater treatment facility using a multi-stage microbial carrier that can prevent swelling or clogging caused by moisture by using a carrier made of a hydrophobic material, increase the amount of microbial attachment with a large specific surface area, and minimize pressure loss and clogging, thereby maximizing the efficiency of odor removal.

[0014] However, the purpose of the present invention is not limited thereto, and it goes without saying that any purpose or effect that can be understood from the means of solving the problem or the embodiments, even if not explicitly mentioned, is also included. means of solving the problem

[0016] According to one embodiment of the present invention for achieving such objectives, the invention comprises: a circulating water management unit (100) that stores circulating water at a constant temperature and supplies and circulates the stored circulating water; a chemical solution management unit (200) connected to the circulating water management unit (100) and injects a chemical solution to control the concentration (pH) of the circulating water; a gas supply unit (300) that sucks in and supplies malodorous gas generated from a facility to be treated; an ammonia gas removal unit (400) that receives malodorous gas from the gas supply unit (300) and removes ammonia gas contained in the malodorous gas using Rhodobacter sphaeroides microorganisms; and a hydrogen sulfide gas removal unit (500) configured above the ammonia gas removal unit (400) and removes hydrogen sulfide gas contained in the malodorous gas using Thiobacillus microorganisms. It is characterized by comprising: a methyl mercaptan removal unit (600) configured on the upper part of the hydrogen sulfide gas removal unit (500) and removing methyl mercaptans contained in the odor gas using Pseudomonas microorganisms; a gas discharge unit (700) for discharging the gas from which the odor gas has been removed; and a control unit (800) for controlling the operation of the odor gas removal device.

[0017] According to one embodiment of the present invention, the circulating water management unit (100) is characterized by comprising: first to third circulating water tanks (102, 104, 106) connected to the chemical solution management unit (200), wherein the circulating water supplied to the ammonia gas removal unit (400), hydrogen sulfide gas removal unit (500), and methyl mercaptan removal unit (600) is separated and stored; a heater (110) configured in each of the first to third circulating water tanks (102, 104, 106) and heating the temperature of the circulating water; and a pH sensor unit (120) that measures and displays the concentration of the circulating water and transmits the measured concentration of the circulating water to the control unit (800).

[0018] According to one embodiment of the present invention, the chemical solution management unit (200) comprises: a chemical solution storage tank (210) in which a chemical solution containing a sodium hydroxide (NaOH) solution is stored so that the concentration of the circulating water can be controlled; a chemical solution supply line (220) for supplying the chemical solution stored in the chemical solution storage tank (210) to the first to third circulating water tanks (102, 104, 106); and first to third chemical solution supply lines (230, 240, 250) that branch off from the chemical solution supply line (220) and respectively connect the first to third circulating water tanks (102, 104, 106).

[0019] According to one embodiment of the present invention, the ammonia gas removal unit (400) comprises: a first main body (410) which is coupled to the upper part of the first circulating water tank (102), has upper and lower parts formed through, and is configured to allow upward movement of the malodorous gas; a first circulation pump (420) which is configured inside the first circulating water tank (102) and supplies circulating water to the upper part of the first main body (410); a first circulating water discharge unit (430) which is connected to the first circulating water pump (420) and sprays circulating water toward the first microorganism carrier (450); and a first microorganism carrier (450) which is configured to capture and dissolve ammonia gas so that the ammonia gas contained in the malodorous gas can be reduced as it reacts with microorganisms. and a first gas movement guide member (460) configured on one side of the upper part of the first main body (410) and guiding the malodorous gas with reduced ammonia gas to move to the hydrogen sulfide gas removal part (500); characterized by including

[0020] According to one embodiment of the present invention, the first main body (410) is connected to the first circulating water tank (102) so that circulating water can be recovered, and is characterized by including a first gas inlet (412) into which odorous gas supplied from the gas supply unit (300) flows in, a first gas removal space (414) which is composed of an upper space and configured so that odorous gas passing through the first microorganism carrier (450) can be supplied to the first gas movement guide member (460), and a first humidity sensor unit (416) configured on one side of the first gas inlet (412) and detecting the internal humidity of the first main body (410) and transmitting it to the control unit (800).

[0021] According to one embodiment of the present invention, the first microbial carrier (450) is characterized by being composed of a first carrier unit (454) coated after Rhodobacter sphaeroides is inoculated and cultured to remove ammonia gas, and a plurality of first carrier units (454) are embedded therein, and first upper and first lower perforated plates (452, 456) each configured on the upper and lower portions of the first carrier unit (454) and made of a polyurethane material.

[0022] According to one embodiment of the present invention, the hydrogen sulfide gas removal unit (500) is configured on the upper part of the first main body (410) of the ammonia gas removal unit (400), and comprises a second main body (510) configured with a second gas inlet (512) into which odorous gas from which ammonia gas has been removed is introduced, a second gas removal space (514) into which odorous gas from which hydrogen sulfide has been removed is introduced, and a second humidity sensor unit (516) that measures internal humidity and transmits it to the control unit (800); a second circulation pump (530) configured in the second circulation water tank (104) and supplying circulating water stored in the second circulation water tank (104); and a second circulation water discharge unit (530) connected to the second circulation pump (520) and spraying circulating water toward the second microorganism carrier (550). The invention is characterized by comprising: a second gas movement guide member (560) configured in the second gas removal space (514) and guiding the odor gas from which hydrogen sulfide gas has been removed to flow into the methyl mercaptan removal section (600); and a second microorganism carrier (550) configured in the second main body (510) and comprising a second carrier unit (554) to which Thiobacillus that removes hydrogen sulfide gas is attached or supported, and a second upper and second lower perforated plate (552, 556) configured respectively on the upper and lower parts of the second carrier unit (554) and having a plurality of through holes formed to allow circulating water to pass through.

[0023] According to one embodiment of the present invention, the hydrogen sulfide gas removal unit (500) is configured in the second gas inlet (512) and is configured to be spaced apart from the lower part of the second microorganism carrier (550), and comprises a first circulating water drainage panel (542) having a plurality of through holes formed therein, a first drainage guide panel (544) configured to be spaced apart from the lower part of the first circulating water drainage panel (542) and guides the circulating water that has passed through the first circulating water drainage panel (542) to be recovered, and a first circulating water drainage line (548) having a first circulating water drainage hole (546) formed therein so that the circulating water moving along the first drainage guide panel (544) can move to the second circulating water tank (104).

[0024] According to one embodiment of the present invention, the methyl mercaptan removal unit (600) is configured on the upper part of the second main body (510) of the hydrogen sulfide gas removal unit (500) and comprises a third main body (610) including a third gas inlet (612) into which odorous gas from which hydrogen sulfide gas has been removed is introduced, a third gas removal space (614) that guides the upward movement of the odor-removed gas, and a third humidity sensor unit (616) that measures the humidity of the internal space and transmits it to a control unit (800); a third circulation pump (620) configured in the third circulation water tank (106) and supplies circulating water; and a third circulation water discharge unit (630) connected to the third circulation pump (620) to receive circulating water and spray the supplied circulating water onto a third microorganism carrier (650). It is characterized by comprising a third microbial carrier (650) comprising a third carrier unit (654) to which Pseudomonas microorganisms are attached or carried, and third upper and third lower perforated plates (652, 656) respectively configured on the upper and lower portions of the third carrier unit (654) and having multiple through holes formed therein to allow circulating water to pass through.

[0025] According to one embodiment of the present invention, the methyl mercaptan removal unit (600) comprises: a second circulating water drainage unit (640) configured in the third gas inlet unit (612), spaced apart from the lower part of the third microorganism carrier (650), and having a plurality of through holes formed therein; a second drainage guide panel (644) spaced apart from the lower part of the second circulating water drainage panel (642) and guiding the circulating water that has passed through the second circulating water drainage panel (642) to be recovered; and a second circulating water drainage line (648) having a second circulating water drainage hole (646) formed therein so that the circulating water moving along the second drainage guide panel (644) can move to the third circulating water tank (106).

[0026] According to one embodiment of the present invention, the control unit (800) is characterized by driving the liquid medicine supply means when the concentration (pH) of the circulating water is 5.8, and stopping the driving of the liquid medicine supply means when the concentration (pH) of the circulating water is 7.8. Effects of the invention

[0028] According to an embodiment of the present invention, high deodorization efficiency can be provided by removing complex malodorous gases including ammonia, hydrogen sulfide, and methyl mercaptan in stages by passing them through a microbial carrier layer optimized for each component.

[0029] In addition, according to an embodiment of the present invention, the temperature, humidity, and pH inside the reactor can be automatically controlled to maintain the activity of microorganisms in an optimal state, and stable deodorization performance can be maintained even with changes in the external environment.

[0030] In addition, according to an embodiment of the present invention, by using a carrier made of a hydrophobic material, swelling or clogging caused by moisture can be prevented, the amount of microorganisms attached can be increased with a large specific surface area, and pressure loss and clogging can be minimized, thereby maximizing the efficiency of odor removal.

[0031] Furthermore, the various and beneficial advantages and effects of the present invention are not limited to those described above and may be more easily understood in the process of explaining specific embodiments of the present invention. Brief explanation of the drawing

[0033] FIG. 1 is a block diagram schematically showing an odor gas removal device for a wastewater treatment facility using a multi-stage microbial carrier according to one embodiment of the present invention. FIG. 2 is a schematic diagram showing an odor gas removal device for a wastewater treatment facility using a multi-stage microbial carrier according to one embodiment of the present invention. FIG. 3 is an enlarged view schematically showing the circulating water management unit and the ammonia removal unit of an odor gas removal device according to one embodiment of the present invention. FIG. 4 is a schematic diagram showing the process of removing ammonia gas in an odor gas removal device according to one embodiment of the present invention. FIG. 5 is an enlarged view schematically showing a hydrogen sulfide removal section of an odor gas removal device according to one embodiment of the present invention. FIG. 6 is a schematic diagram showing the process of removing hydrogen sulfide gas in an odor gas removal device according to one embodiment of the present invention. FIG. 7 is an enlarged view schematically showing a methyl mercaptan removal section of an odor gas removal device according to one embodiment of the present invention. FIG. 8 is a schematic diagram showing the process of removing methyl mercaptans in an odor gas removal device according to one embodiment of the present invention. Specific details for implementing the invention

[0034] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings.

[0035] Furthermore, it should be noted that technical terms used in describing the present invention are used merely to describe specific embodiments and are not intended to limit the invention. Detailed descriptions of related known components or functions are omitted if it is determined that such descriptions could obscure the essence of the invention. Additionally, general terms used in describing the present invention should be interpreted according to their prior definitions or the context, and should not be interpreted in an overly narrow sense. If a technical term is incorrect and fails to accurately express the concept of the invention, it should be replaced with a technical term that can be correctly understood by a person skilled in the art.

[0036] Furthermore, in describing the present invention, terms such as "comprising," "composing," or "having" mean that the relevant components may be inherent unless specifically stated otherwise, and should not be interpreted as necessarily including all of the various components or steps, and should be interpreted as meaning that some of the components or steps may not be included, or that additional components or steps may be included; and all terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined.

[0037] In addition, identification symbols such as 1, 2, A, B, (a), (b), etc. may be used to describe the components of the present invention. These identification symbols are intended to distinguish the components from other components and are used only for convenience of explanation; they do not limit the essence, order, or sequence of the components.

[0038] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0039] As described above, the odor gas removal device for a wastewater treatment facility using a multi-stage microbial carrier of the present invention comprises: a circulating water management unit (100) that stores circulating water for controlling the humidity and temperature of the odor gas and supplies and circulates the stored circulating water; a chemical solution management unit (200) that introduces a chemical solution for controlling the concentration (pH) of the circulating water into the circulating water management unit (100); a gas supply unit (300) that is connected to a facility to be treated and sucks in and supplies the odor gas generated from the facility to be treated; and an ammonia gas removal unit (400) that is connected to the gas supply unit (300), receives the odor gas, and removes the ammonia gas contained in the odor gas using Rhodobacter sphaeroides microorganisms. It is configured to include a hydrogen sulfide gas removal unit (500) that removes hydrogen sulfide gas contained in the odor gas using Thiobacillus microorganisms, a methyl mercaptan removal unit (600) that removes reducing sulfur organic compounds such as methyl mercaptans contained in the odor gas using Pseudomonas microorganisms, a gas discharge unit (700) that discharges gas from which the odor gas has been removed, and a control unit (800) that controls the operation of each component forming the odor gas removal device.

[0041] The circulating water management unit (100) stores circulating water for controlling the humidity and temperature of the odor gas, supplies the stored circulating water to each processing stage under the control of the control unit (800), and recovers and recirculates the used circulating water.

[0042] This circulating water management unit (100) is configured with first to third circulating water tanks (102, 104, 106) so that circulating water supplied to each treatment stage, namely the ammonia gas removal unit (400), the hydrogen sulfide gas removal unit (500), and the methyl mercaptan removal unit (600), can be separated and stored. It is configured to include a heater (110) configured in each of the first to third circulating water tanks (102, 104, 106) to heat the temperature of the circulating water, and a pH sensor unit (120) that measures and displays the concentration of the circulating water and transmits the measured concentration of the circulating water to a control unit (800).

[0043] Here, the first circulating water tank (102) is supplied to the ammonia gas removal unit (400), and the circulating water recovered from the ammonia gas removal unit (400) is stored.

[0044] At this time, the first circulation water tank (102) is configured with a heater (110) that heats the circulation water under the control of the control unit (800) and the first circulation pump (420) of the ammonia gas removal unit (400) is configured.

[0045] Additionally, the second circulation water tank (104) is supplied to the hydrogen sulfide gas removal unit (500), and the circulation water recovered from the hydrogen sulfide gas removal unit (500) is stored therein, and a heater (110) for heating the circulation water and a second circulation pump (520) of the hydrogen sulfide gas removal unit (500) are configured.

[0046] Additionally, the third circulation water tank (106) is supplied to the methyl mercaptan removal unit (600), and the circulation water recovered from the methyl mercaptan removal unit (600) is stored therein, and a heater (110) for heating the circulation water and a third circulation pump (620) of the methyl mercaptan removal unit (600) are configured.

[0047] This circulating water management unit (100) increases the relative humidity of the odor gas as the circulating water comes into contact with the odor gas, and in winter or when the internal temperature of the circulating water tanks is low, it increases the temperature of the stored circulating water by operating the heater (110) to secure the treatment temperature of the odor gas, thereby preventing the reaction of microorganisms configured in each removal unit (400, 500, 600) from decreasing.

[0048] Additionally, the circulating water management unit (100) is configured to detect the condition of the circulating water supplied to each removal unit (400, 500, 600) in real time when odor gas removal is performed through the pH sensor unit (120), and to transmit the detected detection result value to the control unit (800) so that control over whether the chemical solution management unit (200) is operated is performed.

[0049] Here, the pH sensor unit (120) can be configured in each of the first to third circulating water tanks (102, 104, 106).

[0051] The chemical solution management unit (200) supplies the chemical solution used to adjust the pH of the circulating water stored in the circulating water management unit (100) to the first to third circulating water tanks (102, 104, 106) of the circulating water management unit (100) according to the control of the control unit (800).

[0052] Here, the chemical solution may contain sodium hydroxide (NaOH).

[0053] The chemical solution management unit (200) comprises a chemical solution storage tank (210) in which a chemical solution is stored so that the concentration of the circulating water can be controlled, a chemical solution supply line (220) that supplies the chemical solution stored in the chemical solution storage tank (210) to the circulating water management unit (100), and first to third chemical solution supply lines (230, 240, 250) that branch off from the chemical solution supply line (220) and respectively connect the chemical solution storage tank (210) and the first to third circulating water tanks (102, 104, 106) of the circulating water management unit (100).

[0054] The liquid storage tank (210) may further be configured with a liquid supply means that supplies a certain amount of liquid to the liquid supply line (220) under the control of the control unit (800).

[0055] At this time, the liquid supply means may be a conventional metering pump, but is not limited thereto.

[0056] The first to third liquid supply lines (230, 240, 250) branched from the liquid supply line (220) may further be configured with an opening / closing control valve and a backflow prevention valve that open / close each supply line according to the control of the control unit (800).

[0057] Here, among the first to third drug supply lines (230, 240, 250), the first drug supply line (230) is connected to the first circulating water tank (102) and configured so that a certain amount of drug can be supplied.

[0058] Additionally, the second medicine supply line (240) is connected to the second circulating water tank (104), and the third medicine supply line (250) is connected to the third circulating water tank (106).

[0059] The chemical solution management unit (200) of the present invention introduces a sodium hydroxide (NaOH) solution to increase the concentration of the circulating water when acidification of the circulating water proceeds.

[0060] Here, the control unit (800) is configured such that when hydrogen sulfide is removed by oxidation or absorption, acidic byproducts accumulate in the circulating water and the concentration of the circulating water decreases, and when a decrease in the concentration of the circulating water is detected, the operation of the chemical solution management unit (200) is controlled so that the concentration of the circulating water can always be maintained at a constant concentration by introducing a sodium hydroxide solution.

[0061] At this time, the chemical solution management unit (200) injects a certain amount of chemical solution, particularly sodium hydroxide, when the concentration (pH) of the circulating water is less than 6.0 according to the control of the control unit (800), so as not to exceed the concentration (pH) of the circulating water.

[0062] That is, the control unit (800) controls the operation of the liquid management unit (200) so that the injection of the liquid can be stopped when the concentration (pH) of the circulating water reaches 8.0, and at this time, it can control the operation while receiving information regarding the concentration of the circulating water in real time from the pH sensor unit (120) configured in the circulating water management unit (100).

[0063] Preferably, the control unit (800) is configured so that the liquid supply means can be driven when the concentration (pH) of the circulating water approaches a concentration setting value corresponding to 6.0 to 8.0.

[0064] In the present invention, the chemical solution supply means can be driven when the concentration (pH) of the circulating water is 5.8, and the driving of the chemical solution supply means can be stopped when the concentration (pH) of the circulating water is 7.8, and can be controlled by the control unit (800).

[0065] delete

[0066] delete

[0068] The gas supply unit (300) is configured to be connected to a facility to be treated and to suck in malodorous gas and supply it to the first gas inlet (412) of the ammonia gas removal unit (400), and is configured to include a gas suction means (310) and a malodorous gas supply line (320).

[0069] The gas suction means (310) may be composed of a suction fan, but is not limited thereto.

[0070] These gas suction means (310) can be configured to allow the supply amount of odor gas to be adjusted during operation according to the control of the control unit (800).

[0071] The odor gas supply line (320) is connected to the gas suction means (310) and the lower part of the ammonia gas removal unit (400) so that the sucked odor gas can be supplied to the lower part of the ammonia gas removal unit (400).

[0072] Here, the odor gas supply line (320) may further be configured with a concentration sensor and a temperature and humidity sensor to measure the concentration, temperature, and humidity of the incoming odor gas and transmit them to the control unit (800).

[0074] The ammonia gas removal section (400) is a primary odor removal section for preferentially reducing ammonia gas contained in the odor gas, and is configured to be placed in the lower region of the main body of the reactor so that the incoming odor gas can come into contact with microorganisms as it moves in an upward flow, and so that the ammonia gas contained in the odor gas can be biologically treated (removed) by microbial metabolism.

[0075] The ammonia gas removal unit (400) is configured above the circulating water management unit (100) and is configured to be connected to the upper part of the circulating water management unit (100), particularly the first circulating water tank (102), so that the supply and recovery of circulating water can be performed. It is also connected to the gas supply unit (300) to receive odor gas from the gas supply unit (300) and is configured so that the ammonia gas contained in the odor gas can be removed.

[0076] The ammonia gas removal unit (400) is coupled to the upper part of the first circulating water tank (102) of the circulating water management unit (100), and is configured to have upper and lower parts formed through and to allow upward movement of the odor gas, and a first circulating pump (420) configured inside the first circulating water tank (102) and configured to suck in circulating water and supply it to the upper part of the first circulating water tank (410), a first circulating water discharge unit (430) connected to the first circulating pump (420) and configured to spray the circulating water supplied from the first circulating pump (420) toward the first microbial carrier (450) so that a uniform moisture film can be formed on the surface of the first microbial carrier (450), and a first microbial carrier (450) configured to capture and dissolve ammonia gas so that the ammonia gas contained in the odor gas can be reduced as it reacts with the microorganisms. It is configured to include a first gas movement guide member (460) which is configured on one side of the upper part of the first main body (410) and guides the ammonia gas reduced from the odor gas to move to the hydrogen sulfide gas removal part (500).

[0077] The first main body (410) is positioned at the lower part of the main body of the reactor and is configured to allow the first circulating water discharge unit (430) and the first microorganism carrier (450) to be combined inside, and is configured to be connected to the first gas movement guide (460) on one side of the upper side.

[0078] In addition, the first main body (410) may be integrally formed with the second main body (510) of the hydrogen sulfide gas removal unit (500) to be described later.

[0079] In addition, the first main body (410) is configured so that its internal space can be independent by means of the second main body (510) and the first circulating water drainage unit (540).

[0080] This first main body (410) is formed as a lower space and is connected to a first circulating water tank (102) so that circulating water sprayed toward the first microorganism carrier (450) can be recovered, and a first gas inlet (412) is configured such that the odor gas supply line (320) of the gas supply unit (300) is connected so that odor gas can be introduced into the interior.

[0081] Additionally, the first main body (410) is composed of an upper space, into which odorous gas, i.e., ammonia gas, which has been removed (reduced) after passing through the first microorganism carrier (450) is introduced, and a first gas movement guide member (460) is connected, and the first gas removal space (414) is configured so that the introduced odorous gas can be supplied to the first gas movement guide member (460).

[0082] Additionally, the first main body (410) is configured with a first humidity sensor unit (416) that is configured on one side of the first gas inlet (412) and detects the internal humidity of the first main body (410) and transmits it to the control unit (800).

[0083] The first circulation pump (420) is configured to supply the circulating water stored in the first circulating water tank (102) to the first circulating water discharge unit (430) under the control of the control unit (800) so that the circulating water can be sprayed.

[0084] At this time, the first circulation pump (420) penetrates the central part of the first microbial carrier (450) and is connected to the first discharge line (432) of the first circulation water discharge unit (430), thereby forming a first circulation water supply line (422) that supplies circulation water to the first discharge line (432).

[0085] The first circulating water discharge unit (430) is configured to spray circulating water onto the surface of the first microbial carrier (450) to form only moisture consisting of circulating water on the surface of the first microbial carrier (450), and to allow ammonia gas contained in the odor gas to be dissolved and captured as it passes through the moisture film, thereby preventing the microbial coating layer from drying or peeling off from the first carrier unit (454) by spraying the circulating water.

[0086] This first circulating water discharge unit (430) is configured to be spaced apart from the upper portion of the first microbial carrier (450) and is composed of a first discharge line (432) connected to the first circulating water supply line (422) to receive circulating water, and a first spray nozzle (434) configured in multiple portions on the first discharge line (432) to spray the supplied circulating water onto the surface of the first microbial carrier (450).

[0087] The first microbial carrier (450) is coupled to the first main body (410) to remove ammonia gas contained in the odorous gas moving upward from the first gas inlet (412) of the first main body (410), and is composed of a first carrier unit (454) coated after Rhodobacter sphaeroides is inoculated and cultured to remove (reduce) ammonia gas, and a first upper and first lower perforated plate (452, 456) which are respectively configured on the upper and lower parts of the first carrier unit (454) and have multiple first carrier units (454) embedded therein.

[0088] At this time, the first carrier unit (454) is configured to form a microbial coating layer by attaching Rhodobacter spheroides to the surface and the inner wall of the pore.

[0089] In addition, the first upper and first lower perforated plates (452, 456) may be made of polyurethane material.

[0090] This first microbial carrier (450) is configured so that ammonia gas captured in the microbial coating layer formed on the first carrier unit (454) can be assimilated by Rhodobacter spheroides into a nitrogen source necessary for growth, or reduced through a biological reaction depending on the operating conditions.

[0091] The first gas movement guide member (460) is a component that connects the first gas removal space (414) of the first main body (410) with the second gas inlet (512) configured in the hydrogen sulfide gas removal unit (500) to be described later, thereby guiding the odorous gas that has passed through the first microorganism carrier (450) to flow into the second gas inlet (512).

[0093] The hydrogen sulfide gas removal section (500) is a secondary odor removal section for removing hydrogen sulfide contained in the odor gas, and receives the odor gas that has passed through the ammonia removal section (400) and uses Thiobacillus, a sulfur-oxidizing microorganism, to oxidize and neutralize the hydrogen sulfide.

[0094] Here, the thiovalicer is a microorganism capable of biologically removing hydrogen sulfide by oxidizing reduced sulfur compounds to obtain energy, and can be attached to or supported on a second microorganism carrier (550).

[0095] The hydrogen sulfide gas removal unit (500) is configured to include a second main body (510), a second circulation pump (520), a second circulation water discharge unit (530), a first circulation water drainage unit (540), a second microorganism carrier (550), and a second gas movement guide member (560).

[0096] The second main body (510) is configured to have the same shape as the first main body (410) of the ammonia gas removal unit (400) described above, and is configured on the upper part of the first main body (410).

[0097] This second main body (510) is configured with a second gas inlet (512) and a second gas removal space (514), similar to the first main body (410), and a second circulating water discharge unit (530) and a second microorganism carrier (550) are configured between the second gas inlet (512) and the second gas removal space (514), and a second humidity sensor unit (516) is configured to measure the humidity of the internal space of the second main body (510) and transmit the measured humidity information to the control unit (800).

[0098] Here, the second gas inlet (512) is configured to be in communication with the first gas movement guide member (460) of the ammonia gas removal unit (400) so that the malodorous gas from which ammonia gas has been removed can be introduced, and the introduced malodorous gas is configured to move upward and pass through the second microorganism carrier (550).

[0099] In addition, the second gas removal space (514) is configured to communicate with the third gas inlet (612) formed in the third main body (610) of the methyl mercaptan removal unit (600) to be described later, and a second gas movement guide member (560) is configured to guide the odor gas from which hydrogen sulfide gas has been removed to flow into the methyl mercaptan removal unit (600).

[0100] The second circulation pump (530) is configured in the second circulation water tank (104) of the circulation water management unit (100), and is configured so that the circulation water stored in the second circulation water tank (104) can be sprayed onto the second microorganism carrier (550), and a second discharge line (532) connected to the second circulation water discharge unit (530) is configured.

[0101] Here, the second circulating water discharge unit (530) is configured to be spaced apart from the upper part of the second microbial carrier (550) and is configured in the same way as the first circulating water discharge unit (530).

[0102] That is, the second circulating water discharge unit (530) is also configured with a second discharge line (532) and a second injection nozzle (534).

[0103] Meanwhile, the hydrogen sulfide gas removal unit (500) is configured with a first circulating water drainage unit (540) configured to recover the circulating water supplied to the second microbial carrier (550) and drain it into the interior of the second circulating water tank (104).

[0104] The first circulating water drainage unit (540) is configured in the second gas inlet (512) and is configured to be spaced apart from the lower part of the second microorganism carrier (550), and comprises a first circulating water drainage panel (542) having a plurality of through holes formed therein, a first drainage guide panel (544) configured to be spaced apart from the lower part of the first circulating water drainage panel (542) and guides the circulating water that has passed through the first circulating water drainage panel (542) to be recovered, and a first circulating water drainage line (548) formed to extend from one end of the first circulating water drainage panel (542) and the first drainage guide panel (544), and having a first circulating water drainage hole (546) formed therein so that the circulating water moving along the first drainage guide panel (544) can move to the second circulating water tank (104).

[0105] Here, the first drainage guide panel (544) may be configured as a sloping panel that slopes downward as it moves from the other side of the second gas inlet (512), that is, from the position opposite to where the first circulating water drainage line (548) is formed, toward the one end connected to the first circulating water drainage line (548).

[0106] The second microbial carrier (550) is coupled to the second main body (510) to remove hydrogen sulfide gas contained in the odor gas moving upward from the second gas inlet (512) of the second main body (510), and is composed of a second carrier unit (554) to which Thiobacillus that removes hydrogen sulfide gas is attached or carried, and second upper and second lower perforated plates (552, 556) which are respectively configured on the upper and lower parts of the second carrier unit (554) and have multiple through holes formed so that circulating water can pass through.

[0107] Here, the second carrier unit (554) may be composed of a polyurethane-based porous carrier in which thiobacillus is attached or supported in the central part, but is not limited thereto.

[0109] The methyl mercaptan removal unit (600) removes methyl mercaptan components in the malodorous gas introduced through the second gas movement guide member (560) of the hydrogen sulfide gas removal unit (500) by oxidizing and decomposing them using microorganisms including Pseudomonas, and is configured to include a third main body (610), a third circulation pump (620), a third circulation water discharge unit (630), a second circulation water drainage unit (640), and a third microorganism carrier (650).

[0110] Here, methyl mercaptan is a representative sulfur-based odor component along with hydrogen sulfide, and has a high odor intensity even at low concentrations in the air. It is a sulfur organic compound that is continuously generated in processes, livestock barns, wastewater treatment facilities, etc., and can be removed by being diluted or oxidized through reaction with microbial communities such as Pseudomonas.

[0111] The third main body (610) is configured on the upper part of the second main body (510) of the aforementioned hydrogen sulfide gas removal unit (500), and is configured to have the same shape as the first and second main bodies (410, 510).

[0112] That is, the third main body (610) is configured to communicate with the second gas movement guide member (560) of the hydrogen sulfide gas removal unit (500) to allow the inflow of odorous gas, and a third gas inlet unit (612) is formed to guide the upward movement of the inflowed odorous gas, and a third gas removal space unit (614) is formed to guide the upward movement of the odor-removed gas passing through the third microorganism carrier (650) and to communicate with the gas discharge unit (700).

[0113] In addition, the third main body (610) is configured with a third humidity sensor unit (616) that measures the humidity of the internal space and transmits it to the control unit (800), thereby enabling the humidity of the third main body (610) to always maintain a constant humidity.

[0114] At this time, the third humidity sensor unit (616) is preferably configured on one side of the third gas inlet (616), but is not limited thereto.

[0115] The third circulation pump (620) is configured in the third circulation water tank (106) of the circulation water management unit (100) and is configured so that the circulation water can be sprayed toward the third microorganism carrier (650), and a third discharge line (632) connected to the third circulation water discharge unit (630) is configured.

[0116] Here, the third circulating water discharge unit (630) is configured to be spaced apart from the upper part of the third microorganism carrier (650), and is configured in the same way as the first and second circulating water discharge units (430, 530).

[0117] That is, the third circulating water discharge unit (630) is also configured with a third discharge line (632) and a third injection nozzle (634).

[0118] The second circulating water drainage unit (640) is configured to recover the circulating water supplied to the third microbial carrier (650) and drain it into the interior of the third circulating water tank (106), just like the first circulating water drainage unit (540), and is composed of a second circulating water drainage panel (642), a second drainage guide panel (644), a second circulating water drainage hole (646), and a second circulating water drainage line (648).

[0119] The second circulating water drainage panel (642) is configured to be spaced apart from the lower part of the third microbial carrier (650), and is configured to have a plurality of through holes formed so that the circulating water passing through the third microbial carrier (650) can flow in.

[0120] The second drainage guide panel (644) is configured to be spaced apart from the lower part of the second circulating water drainage panel (642) and guides the circulating water that has passed through the second circulating water drainage panel (642) to be recovered.

[0121] The second circulating water drainage line (648) has a first circulating water drainage hole (546) formed so that the circulating water moving along the first drainage guide panel (544) can move to the second circulating water tank (104).

[0122] At this time, the second drainage guide panel (644) may be configured to have a shape that slopes downward as it moves toward the second circulating water drainage line (648).

[0124] The third microbial carrier (650) is configured to remove methyl mercaptans contained in malodorous gas by reacting with microorganisms including Pseudomonas, and is composed of a third carrier unit (654) to which Pseudomonas microorganisms are attached or carried, and third upper and third lower perforated plates (652, 656) which are respectively configured on the upper and lower parts of the third carrier unit (654) and have multiple through holes formed to allow circulating water to pass through.

[0125] Here, the third carrier unit (654), like the first microbial carrier (450) described above, has a microbial coating layer formed on its surface and the inner wall of the pores after the Pseudomonas microorganisms are inoculated and cultured.

[0127] The gas discharge unit (700) is a component that discharges gas from which odor components have been removed through each of the removal units (400, 500, 600) to the outside.

[0128] This gas discharge section (700) is formed by integrally extending upward from the upper end of the third main body section (610) of the methyl mercaptan removal section (600) and configuring the upper end thereof to have a predetermined arc to guide the concentration of gas toward the central end, and is configured to include a gas discharge section (710) connected to the central part of the gas discharge section (710) and discharges the concentrated gas.

[0129] Although not shown in the drawing, the gas discharge unit (700) may further be configured with a gas concentration measuring sensor unit that measures the concentration of the discharged gas and transmits it to the control unit (800), and enables real-time display through the control unit (800).

[0131] The control unit (800) is a component that integrates and controls the operation of each component forming the odor gas removal device, and is configured to stably maintain the odor gas treatment efficiency by controlling whether the circulating water management unit (100), chemical solution management unit (200), gas supply unit (300), ammonia gas removal unit (400), hydrogen sulfide gas removal unit (500), and methyl mercaptan removal unit (600) are operated.

[0132] This control unit (800) controls the first to third circulation pumps (420, 520, 620) and the first to third circulation water discharge units (430, 530, 630) based on humidity information received from the first to third humidity sensor units (416, 516, 616) to adjust the amount of circulating water sprayed, thereby maintaining the inside of the reactor within a set humidity range.

[0133] In the present invention, the internal humidity of the first to third main body parts (410, 510, 610) is maintained at 65% to 75%.

[0134] Additionally, the control unit (800) controls the liquid management unit (200) based on the concentration information of the circulating water received in real time from the pH sensor unit (120), and performs liquid injection when the concentration of the circulating water deviates from the set range.

[0135] At this time, the control unit (800) takes into account the phenomenon in which acidic byproducts accumulate and the concentration (pH) of the circulating water decreases during the process of oxidation or absorption removal of hydrogen sulfide, and controls the amount of sodium hydroxide (NaOH) to be injected when the concentration of the circulating water is less than 6.0, while limiting the amount and time of injection so that the concentration of the circulating water does not exceed 8.0, and stops the injection when the concentration of the circulating water reaches a level close to 8.0.

[0136] Preferably, the chemical solution management unit (200) is driven when the concentration of the circulating water is 5.8, and the driving of the chemical solution management unit (200) is stopped when the concentration of the circulating water is 7.8.

[0137] In addition, the control unit (800) controls the operation of the heater (110) so that the temperature of the circulating water can be maintained at 25°C to 30°C, thereby securing the odor gas treatment temperature and preventing the reaction of microorganisms from decreasing.

[0138] The foregoing description 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 within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0140] 100: Circulating Water Management Department 102: 1st Circulating Water Tank 104: 2nd Circulating Water Tank 106: 3rd Circulating Water Tank 110: Heater 120: pH sensor unit 200: Chemical Management Department 210: Chemical Storage Tank 220: Liquid dispensing line 230: First liquid supply line 240: 2nd drug solution supply line 250: 3rd drug solution supply line 300: Gas supply unit 310: Gas suction means 320: Malodorous gas supply line 400: Ammonia gas removal unit 410: First main body unit 412: First gas inlet section 414: First gas removal space section 416: First humidity sensor unit 420: First circulation pump 422: First circulating water supply line 430: First circulating water discharge unit 432: 1st discharge line 434: 1st injection nozzle 450: First microbial carrier 452: First upper perforated plate 454: First carrier unit 456: First lower perforated plate 460: No. 1 Gas Movement Guide Absence 500: Hydrogen sulfide gas removal unit 510: Second main body unit 512: Second gas inlet section 514: Second gas removal space section 516: Second humidity sensor unit 520: Second circulation pump 522: Second circulating water supply line 530: Second circulating water discharge unit 532: Second discharge line 534: Second injection nozzle 540: First circulating water drainage unit 542: First circulating water drainage panel 544: 1st Drainage Guide Panel 546: 1st Circulating Water Drainage Hole 548: 1st circulating water drainage line 550: 2nd microbial carrier 552: Second upper perforated plate 554: Second carrier unit 556: Second lower perforated plate 560: Second gas movement guide component 600: Methyl mercaptan removal unit 610: Third main body unit 612: Third gas inlet 614: Third gas removal space 616: Third humidity sensor unit 620: Third circulation pump 622: Third circulating water supply line 630: Third circulating water discharge unit 632: 3rd discharge line 634: 3rd injection nozzle 640: Second circulating water drainage unit 642: Second circulating water drainage panel 644: Second Drainage Guide Panel 646: Second Circulating Water Drainage Hole 648: Second circulating water drainage line 650: Third microbial carrier 652: Third upper perforated plate 654: Third carrier unit 656: 3rd lower perforated plate 700: Gas exhaust section 710: Exhaust gas concentration section 720: Gas outlet 800: Control unit

Claims

Claim 1 A circulating water management unit (100) that stores circulating water at a constant temperature and supplies and circulates the stored circulating water; a chemical solution management unit (200) connected to the circulating water management unit (100) and injects a chemical solution to control the concentration (pH) of the circulating water; a gas supply unit (300) that sucks in and supplies malodorous gas generated from a facility to be treated; and an ammonia gas removal unit (400) comprising a first microorganism carrier (450) that receives malodorous gas from the gas supply unit (300) and is configured to capture and dissolve the ammonia gas contained in the malodorous gas using Rhodobacter sphaeroides microorganisms so that the ammonia gas contained in the malodorous gas can be reduced as it reacts with the microorganisms. A hydrogen sulfide gas removal unit (500) comprising a second microbial carrier (550) which is configured to be stacked on the upper part of the ammonia gas removal unit (400) and to which a thiobacillus microorganism is attached or carried so as to remove hydrogen sulfide gas contained in the malodorous gas using the thiobacillus microorganism, and a second upper and second lower perforated plate (552, 556) which is configured respectively on the upper and lower parts of the second carrier unit (554) and has a plurality of through holes formed so that circulating water can pass through; A methyl mercaptan removal unit (600) comprising a third microbial carrier (650) which is configured to be stacked on the upper part of the hydrogen sulfide gas removal unit (500) and has Pseudomonas microorganisms attached or supported thereon so as to remove methyl mercaptans contained in the malodorous gas using Pseudomonas microorganisms, and a third upper and third lower perforated plates (652, 656) which are configured respectively on the upper and lower parts of the third carrier unit (654) and have multiple through holes formed therein to allow circulating water to pass through; and a gas discharge unit (700) for discharging gas from which the malodorous gas has been removed;and a control unit (800) for controlling the operation of an odor gas removal device; wherein the circulating water management unit (100) separates and stores circulating water supplied to the ammonia gas removal unit (400), hydrogen sulfide gas removal unit (500), and methyl mercaptan removal unit (600), respectively, and includes first to third circulating water tanks (102, 104, 106) connected to the chemical solution management unit (200); and a heater (110) configured in each of the first to third circulating water tanks (102, 104, 106) and heating the temperature of the circulating water. The ammonia gas removal unit (400) includes a pH sensor unit (120) that measures and displays the concentration of the circulating water and transmits the measured concentration of the circulating water to the control unit (800); the ammonia gas removal unit (400) is coupled to the upper part of the first circulating water tank (102), has upper and lower parts formed through, and is configured to allow upward movement of the odor gas; a first circulation pump (420) configured inside the first circulating water tank (102) and supplies circulating water to the upper part of the first main body (410); and a first circulating water discharge unit (430) connected to the first circulating water pump (420) and sprays circulating water toward the first microorganism carrier (450). A wastewater treatment facility odor gas removal device using a multi-stage microbial carrier, characterized by including: a first gas movement guide member (460) configured on one side of the upper part of the first main body (410) and guiding the odor gas with reduced ammonia gas to move to the hydrogen sulfide gas removal part (500). Claim 2 delete Claim 3 In claim 1, the chemical solution management unit (200) comprises: a chemical solution storage tank (210) in which a chemical solution containing a sodium hydroxide (NaOH) solution is stored so that the concentration of the circulating water can be controlled, and a chemical solution supply means is configured to supply a certain amount of chemical solution to the chemical solution supply line (220) according to the control of the control unit (800); a chemical solution supply line (220) that supplies the chemical solution stored in the chemical solution storage tank (210) to the first to third circulating water tanks (102, 104, 106); and first to third chemical solution supply lines (230, 240, 250) that branch off from the chemical solution supply line (220) and respectively connect the first to third circulating water tanks (102, 104, 106), thereby forming a wastewater treatment facility odor gas removal device using a multi-stage microbial carrier. Claim 4 delete Claim 5 In claim 1, the first main body (410) is connected to the first circulating water tank (102) so that circulating water can be recovered, and includes a first gas inlet (412) into which odorous gas supplied from the gas supply unit (300) flows in, a first gas removal space (414) which is composed of an upper space and configured so that odorous gas passing through the first microbial carrier (450) can be supplied to the first gas movement guide member (460), and a first humidity sensor unit (416) configured on one side of the first gas inlet (412) to detect the internal humidity of the first main body (410) and transmit it to the control unit (800). Claim 6 A wastewater treatment facility odor gas removal device using a multi-stage microbial carrier according to claim 1, wherein the first microbial carrier (450) is composed of a first carrier unit (454) coated after Rhodobacter sphaeroides is inoculated and cultured to remove ammonia gas, and a plurality of first carrier units (454) are embedded therein, and first upper and first lower perforated plates (452, 456) are respectively configured on the upper and lower portions of the first carrier units (454) and are made of polyurethane material. Claim 7 In claim 1, the hydrogen sulfide gas removal unit (500) is configured on the upper part of the first main body (410) of the ammonia gas removal unit (400), and the second microbial carrier (550) is configured therein, and the second main body (510) is configured therein, the second gas inlet (512) into which the odorous gas from which the ammonia gas has been removed is introduced, the second gas removal space (514) into which the odorous gas from which the hydrogen sulfide gas has been removed is introduced, and the second humidity sensor unit (516) that measures internal humidity and transmits it to the control unit (800); the second circulation pump (520) configured in the second circulation water tank (104) and supplies the circulation water stored in the second circulation water tank (104); and the second circulation water discharge unit (530) connected to the second circulation pump (520) and spraying the circulation water toward the second microbial carrier (550). A second gas movement guide member (560) configured in the second gas removal space (514) and guiding the odor gas from which hydrogen sulfide gas has been removed to flow toward the methyl mercaptan removal section (600); A wastewater treatment facility odor gas removal device using a multi-stage microbial carrier, characterized by comprising: a first circulating water drainage unit (540) configured in the second gas inlet section (512) and spaced apart from the lower part of the second microbial carrier (550), having a plurality of through holes formed therein; a first drainage guide panel (544) configured spaced apart from the lower part of the first circulating water drainage panel (542) to guide the circulating water that has passed through the first circulating water drainage panel (542) to be recovered; and a first circulating water drainage line (548) having a first circulating water drainage hole (546) formed therein so that the circulating water moving along the first drainage guide panel (544) can move to the second circulating water tank (104). Claim 8 In claim 1, the methyl mercaptan removal unit (600) is configured on the upper part of the second main body (510) of the hydrogen sulfide gas removal unit (500) and comprises a third main body (610) including a third gas inlet (612) into which the odorous gas from which hydrogen sulfide gas has been removed flows, a third gas removal space (614) that guides the upward movement of the odor-removed gas, and a third humidity sensor unit (616) that measures the humidity of the internal space and transmits it to the control unit (800); a third circulation pump (620) configured in the third circulation water tank (106) and supplying circulation water; and a third circulation water discharge unit (630) connected to the third circulation pump (620) to receive circulation water and spray the supplied circulation water onto the third microorganism carrier (650). A wastewater treatment facility odor gas removal device using a multi-stage microbial carrier, characterized by comprising: a second circulating water drainage unit (640) configured in the third gas inlet section (612) and spaced apart from the lower part of the third microbial carrier (650), having a plurality of through holes formed therein; a second drainage guide panel (644) configured spaced apart from the lower part of the second circulating water drainage panel (642) to guide the circulating water that has passed through the second circulating water drainage panel (642) to be recovered; and a second circulating water drainage line (648) having a second circulating water drainage hole (646) formed therein so that the circulating water moving along the second drainage guide panel (644) can move to the third circulating water tank (106). Claim 9 In paragraph 3, the control unit (800) is characterized by driving the chemical solution supply means when the concentration (pH) of the circulating water is 5.8 and stopping the driving of the chemical solution supply means when the concentration (pH) of the circulating water is 7.8, in a wastewater treatment facility odor gas removal device using a multi-stage microbial carrier.

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