Odor treatment device for sewage plant

Abstract

The utility model relates to an odor treatment device for a sewage plant. The odor treatment device comprises a heavy odor inlet pipe, a light odor inlet pipe, an air outlet pipe, a biological spray tower, a biological filter, an ozone spray tower and an activated carbon adsorption bed, the heavy odor inlet pipe is communicated with the gas inlet end of the biological spray tower, the gas outlet end of the biological spray tower is communicated with the gas inlet end of the biological filter, the gas outlet end of the biological filter is communicated with the gas inlet end of the ozone spray tower, the gas inlet end of the activated carbon adsorption bed is divided into two branches, one branch is communicated with the gas outlet end of the ozone spray tower, and the other branch is communicated with the gas outlet end of the ozone spray tower. And the gas outlet end of the activated carbon adsorption bed is communicated with the gas outlet pipe. The odor treatment device for the sewage plant has the beneficial effects that due to the adoption of the structure, the heavy odor and the light odor can be respectively treated, so that the treatment efficiency of the heavy odor and the light odor is improved, and the operation cost of the odor treatment device for the sewage plant is also reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of odor treatment equipment, and in particular to an odor treatment device for sewage treatment plants. Background Technology

[0002] A biological treatment tank is a device used for biological wastewater treatment, purifying wastewater through the biodegradation of organic matter. It is an important component of wastewater treatment systems, commonly used in wastewater treatment plants, industrial wastewater treatment, and domestic sewage treatment. Traditional wastewater treatment plants often have large land areas and dispersed layouts of various wastewater treatment facilities. Specifically, the anaerobic and anoxic zones, sludge tanks, and modular intelligent dewatering equipment in the biological treatment tanks of wastewater treatment plants generate strong odors. These strong odors are characterized by high concentrations (e.g., H2S > 100 ppm) and complex compositions (containing sulfur-containing organic matter, halogenated hydrocarbons, benzene compounds, and other recalcitrant VOCs). Conversely, the aerobic and facultative anaerobic zones, modular MBR membrane separation equipment, modular secondary sedimentation equipment, and modular advanced treatment equipment in wastewater treatment plants generate mild odors. These mild odors are characterized by low concentrations (e.g., H2S < 50 ppm), simple compositions (mainly inorganic substances such as hydrogen sulfide and ammonia), or easily degradable odors.

[0003] Chinese patent document CN211328903U discloses an odor treatment system for a wastewater treatment plant, including a filter tank. The filter tank comprises a pre-wash tank and a biological filter tank. The spray section of the pre-wash tank spray pipe is located above the pre-wash tank, and the spray section of the biological filter spray pipe is located above the biological filter tank. The pre-wash tank spray pipe and the biological filter spray pipe are connected to a circulating water tank. A pre-wash tank spray pump and a biological filter spray pump are respectively installed on the pre-wash tank spray pipe and the biological filter spray pipe. The biological filter tank is equipped with high-efficiency packing material. The pre-wash tank drain pipe and the biological filter drain pipe are respectively connected to the bottom of the pre-wash tank and the biological filter tank. An air inlet pipe and an air outlet pipe are connected in the middle of the filter tank. An exhaust fan is installed on the air inlet pipe, and the air outlet pipe is connected to an activated carbon adsorber. The defects and shortcomings of this sewage treatment plant's odor treatment system are as follows: because the system collects and treats both heavy and light odors together, the light odors dilute the heavy odors, reducing the efficiency of heavy odor treatment; and the combined multiple treatments of light and heavy odors result in higher operating costs for the sewage treatment plant's odor treatment system.

[0004] Therefore, there is an urgent need to provide a wastewater treatment device with low operating costs and high odor treatment efficiency. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a sewage treatment plant odor treatment device, which solves the technical problems of high operating cost and low odor treatment efficiency of sewage treatment plant odor treatment system.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] This utility model provides a wastewater treatment odor control device, including a heavy odor inlet pipe, a light odor inlet pipe, an outlet pipe, a biological spray tower, a biological filter, and an activated carbon adsorption bed;

[0010] The heavy odor inlet pipe is connected to the inlet end of the biological spray tower, the outlet end of the biological spray tower is connected to the inlet end of the biological filter, the inlet end of the activated carbon adsorption bed is divided into two branches, one of which is connected to the outlet end of the biological filter, and the other branch is connected to the light odor inlet pipe, and the outlet end of the activated carbon adsorption bed is connected to the outlet pipe.

[0011] Optionally, it also includes an ozone spray tower;

[0012] The outlet of the biological filter is connected to the inlet of the ozone spray tower, and the outlet of the ozone spray tower is connected to the inlet of the activated carbon adsorption bed.

[0013] Optionally, it also includes an outer shell, the interior of which is divided into an operating area, a biological filter area, and an activated carbon adsorption area;

[0014] The operating area is equipped with a biological spray tower and an ozone spray tower, the biological filter area is equipped with a biological filter, and the activated carbon adsorption area is equipped with an activated carbon adsorption bed. The outer ports of the heavy odor gas inlet pipe, the light odor gas inlet pipe and the outlet pipe all pass through the outer shell.

[0015] Optionally, the outer shell is a vertically placed cylindrical structure, and manholes are respectively opened on the tube wall of the outer shell corresponding to the operation area, the biological filter area and the activated carbon adsorption area, and the manholes are covered with airtight doors.

[0016] Optionally, the biological filter is provided with a packing layer, the surface of which is covered with a biofilm.

[0017] Optionally, the filler layer is composed of one or more of the following: sponge, ceramsite, activated carbon particles, polyurethane foam particles, waste wood chips, bark, hay, and fibrous peat.

[0018] Optionally, the ozone spray tower includes an ozone generator, an ozone injection device, and a spray tower;

[0019] The ozone generator is located outside the spray tower and is connected to the ozone injection device via a pipeline. The ozone injection device is installed inside the spray tower.

[0020] Optionally, the activated carbon adsorption bed is a horizontal activated carbon adsorption bed.

[0021] Optionally, the horizontal activated carbon adsorption bed includes a horizontal fixed bed and multiple adsorption units;

[0022] The horizontal fixed bed is a horizontal cylindrical or rectangular box with a detection door on the side of the box. Each detection door has a removable adsorption unit filled with activated carbon adsorbent.

[0023] Optionally, it also includes an outer shell, the interior of which is divided into an operating area, a biological filter area, and an activated carbon adsorption area;

[0024] The operating area is equipped with a biological spray tower and an ozone spray tower. The entire biological filter area constitutes a biological filter, and the entire activated carbon adsorption area constitutes an activated carbon adsorption bed. The outer ports of the heavy odor gas inlet pipe, the light odor gas inlet pipe, and the outlet pipe all pass through the outer shell.

[0025] (III) Beneficial Effects

[0026] The beneficial effects of this utility model are as follows: The wastewater treatment plant odor control device of this utility model includes a heavy odor inlet pipe, a light odor inlet pipe, an outlet pipe, a biological spray tower, a biological filter, and an activated carbon adsorption bed. The heavy odor inlet pipe is connected to the inlet end of the biological spray tower, the outlet end of the biological spray tower is connected to the inlet end of the biological filter, and the inlet end of the activated carbon adsorption bed is divided into two branches, one of which is connected to the outlet end of the biological filter, and the other branch is connected to the light odor inlet pipe. The outlet end of the activated carbon adsorption bed is connected to the outlet pipe. Compared with existing wastewater treatment plant odor control systems, it can treat heavy and light odors separately, which improves the treatment efficiency of heavy and light odors and reduces the operating cost of the wastewater treatment plant odor control device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structural principle of Embodiment 1 of the wastewater treatment odor control device of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the odor treatment device for sewage treatment plants of this utility model;

[0029] Figure 3 This is a schematic diagram of the activated carbon adsorption bed in Embodiment 3 of the wastewater treatment odor control device of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the wastewater treatment odor control device of this utility model;

[0031] Figure 5This is a schematic diagram of the structural principle of Embodiment 5 of the wastewater treatment odor control device of this utility model;

[0032] Figure 6 This is a schematic diagram of the structural principle of Embodiment 6 of the odor treatment device for sewage treatment plants of this utility model.

[0033] [Explanation of Labels in the Attached Image]

[0034] 1: Heavy odor gas inlet pipe; 2: Light odor gas inlet pipe; 3: Gas outlet pipe; 4: Biological spray tower; 5: Biological filter; 6: Ozone spray tower; 7: Activated carbon adsorption bed; 8: Outer shell; 9: Operating area; 10: Box; 11: Adsorption unit. Detailed Implementation

[0035] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1:

[0037] Reference Figure 1 This embodiment provides a wastewater treatment plant odor control device, including a heavy odor inlet pipe 1, a light odor inlet pipe 2, an outlet pipe 3, a biological spray tower 4, a biological filter 5, an ozone spray tower 6, and an activated carbon adsorption bed 7.

[0038] The heavy odor inlet pipe 1 is connected to the inlet end of the biological spray tower 4, the outlet end of the biological spray tower 4 is connected to the inlet end of the biological filter 5, the outlet end of the biological filter 5 is connected to the inlet end of the ozone spray tower 6, the inlet end of the activated carbon adsorption bed 7 is divided into two branches, one of which is connected to the outlet end of the ozone spray tower 6, and the other branch is connected to the light odor inlet pipe 2, and the outlet end of the activated carbon adsorption bed 7 is connected to the outlet pipe 3.

[0039] The wastewater treatment plant odor control device in this embodiment, due to its aforementioned structure, can treat heavy and light odors separately. This improves the treatment efficiency of heavy and light odors and reduces the operating cost of the wastewater treatment plant odor control device. Specifically, the heavy odor contains high concentrations of H2S and has complex components. First, the biological spray tower 4 pre-washes the heavy odor to remove large particles and dust, and adjusts the temperature and humidity of the heavy odor to provide a humid environment for microbial metabolism. At the same time, the microbial agents in the spray liquid initiate the degradation of some organic matter in the heavy odor during the pre-washing stage. Second, the heavy odor enters the biological filter 5 and undergoes gas-liquid mass transfer from bottom to top through the packing layer of the biological filter 5. The odor components in the liquid film diffuse into the biofilm under the action of the concentration difference and come into full contact with the microorganisms. Through the metabolism of the microorganisms, the malodorous substances are oxidized and degraded into low-odor and odorless substances. Next, the heavy odorous gas enters the ozone spray tower 6. The ozone (O3) in the ozone spray tower 6 reacts with pollutants in the exhaust gas (such as NOx, VOCs, H2S, etc.) to generate hydroxyl radicals (·OH), achieving deep oxidation and decomposing organic matter into CO2 and H2O, converting sulfides into sulfates, and nitrogen oxides into nitrates. The spray liquid (such as an alkaline solution) can neutralize acidic gases (such as H2S and SO2) to form soluble salts. Simultaneously, the oxidizing effect of ozone enhances the removal efficiency of recalcitrant pollutants. Finally, the heavy odorous gas enters the activated carbon adsorption bed 7. On one hand, the odor molecules of the light odorous gas are adsorbed onto the surface of the activated carbon through intermolecular attraction. This process requires no chemical reaction and is suitable for most volatile organic compounds (VOCs) and odorous substances. On the other hand, the activated carbon surface contains chemical groups such as hydroxyl and carboxyl groups, which can react chemically with polar molecules (such as sulfur-containing compounds) to form stable chemical bonds, enhancing the removal effect of recalcitrant substances. The H2S concentration of the light odor is low and the composition is simple. Therefore, it can meet the emission standards by simply purifying it with activated carbon adsorption bed 7.

[0040] Example 2:

[0041] Reference Figure 2 This embodiment provides another wastewater treatment plant odor treatment device. Unlike embodiment 1, the wastewater treatment plant odor treatment device in this embodiment also includes an outer shell 8. The interior of the outer shell 8 is divided into an operation area 9, a biological filter area, and an activated carbon adsorption area.

[0042] The operating area 9 is equipped with a biological spray tower 4 and an ozone spray tower 6. The biological filter area is equipped with a biological filter 5. The activated carbon adsorption area is equipped with an activated carbon adsorption bed 7. The outer ports of the heavy odor gas inlet pipe 1, the light odor gas inlet pipe 2 and the outlet pipe 3 all pass through the outer shell 8.

[0043] There are weak sealing areas at the pipe interfaces between the biological spray tower 4, biological filter 5, ozone spray tower 6, and activated carbon adsorption bed 7, from which odor can easily leak. In this embodiment, the odor treatment device for the wastewater treatment plant houses the biological spray tower 4, biological filter 5, ozone spray tower 6, and activated carbon adsorption bed 7 inside the outer shell 8. Even if odor leakage occurs at the pipe interfaces, the odor will not be directly discharged into the outside atmosphere, which improves the overall airtightness of the odor treatment device.

[0044] Furthermore, in this embodiment, the outer shell 8 is preferably a vertically placed cylindrical structure.

[0045] Furthermore, manholes are provided on the pipe wall of the outer shell 8 corresponding to the operating area 9, the biological filter area, and the activated carbon adsorption area, respectively, and the manholes are covered with airtight doors. It should be noted that the purpose of providing manholes is to facilitate workers to enter the outer shell 8 to maintain and repair the biological spray tower 4, the biological filter 5, the ozone spray tower 6, and the activated carbon adsorption bed 7.

[0046] The other parts that are the same as in Example 1 will not be repeated here.

[0047] Example 3:

[0048] Based on Example 2, this example provides another odor treatment device for wastewater treatment plants. In this example, the biological filter 5 is equipped with a packing layer, the surface of which is covered with a biofilm. Preferably, the packing layer is composed of one or more of the following: sponge, ceramsite, activated carbon particles, polyurethane foam particles, waste wood chips, bark, hay, and fibrous peat. It should be noted that the combination of one or more of the following—sponge, ceramsite, activated carbon particles, polyurethane foam particles, waste wood chips, bark, hay, and fibrous peat—is a pure mixture of substances without any chemical reaction.

[0049] Furthermore, the ozone spray tower 6 includes an ozone generator, an ozone injection device, and a spray tower. The ozone generator is located outside the spray tower and is connected to the ozone injection device via a pipeline. The ozone injection device is installed inside the spray tower.

[0050] Specifically, the ozone generator uses high-voltage discharge or ultraviolet photolysis technology to produce ozone, which is then transported to the ozone injection device via pipeline. The ozone injection device is a perforated nozzle or grid, which can evenly inject ozone into the tower, ensuring that the ozone and odor gas are fully mixed and react.

[0051] See Figure 3 The activated carbon adsorption bed 7 is preferably a horizontal activated carbon adsorption bed. Horizontal activated carbon adsorption beds have a large gas flow cross-sectional area and a thinner bed layer, which is conducive to adjusting the gas velocity without having large bed resistance. Therefore, it is suitable for the treatment of odor in sewage treatment plants with large air volume and low concentration.

[0052] Specifically, the horizontal activated carbon adsorption bed includes a horizontal fixed bed and multiple adsorption units 11. The horizontal fixed bed is a horizontal cylindrical or rectangular box 10. Detection doors are opened on the side of the box 10, and an adsorption unit 11 is detachably installed in each detection door. The adsorption unit 11 is filled with activated carbon adsorbent. The activated carbon adsorbent is preferably granular activated carbon or activated carbon fiber felt.

[0053] In this embodiment, multiple adsorption units 11 are installed in a layered drawer-like manner inside the housing 10, which makes it very convenient for operators to take them out from the inspection doors on both sides of the housing 10, ultimately achieving the effect of facilitating worker inspection and maintenance.

[0054] The working process of the odor treatment device for the wastewater treatment plant in this embodiment is as follows:

[0055] The treatment process for heavy odorous gases is as follows: First, the heavy odorous gas enters the biological spray tower 4 through the heavy odorous gas inlet pipe 1, where it undergoes pre-washing. After pre-washing, the heavy odorous gas enters the biological filter 5 through a pipe, undergoing gas-liquid mass transfer from bottom to top through the packing layer. Odor components in the liquid film diffuse into the biofilm under the influence of concentration difference, coming into full contact with microorganisms. Through the metabolism of these microorganisms, the malodorous substances are oxidized and degraded into low-odor and odorless substances. After passing through the biological filter 5, the heavy odorous gas enters the ozone spray tower 6 through a pipe, where it undergoes ozone decomposition of the untreated malodorous gases. After ozone decomposition, the heavy odorous gas enters the activated carbon adsorption bed 7, where it is treated into harmless gases and finally discharged through the outlet pipe 3 to meet emission standards.

[0056] The treatment process for mild odor is as follows: the mild odor enters the activated carbon adsorption bed 7 through the mild odor inlet pipe 2. The activated carbon adsorption bed 7 removes the odor molecules in the mild odor through a combination of physical adsorption and chemical adsorption. Then, the qualified gas is discharged into the atmosphere through the outlet pipe 3.

[0057] The other parts that are the same as in Example 2 will not be repeated here.

[0058] Example 4:

[0059] See Figure 4 This embodiment provides another odor treatment device for sewage treatment plants. The difference from embodiment 2 is that the entire biological filter zone of this embodiment constitutes a biological filter 5, and the entire activated carbon adsorption zone of this embodiment constitutes an activated carbon adsorption bed 7.

[0060] During maintenance, operators can access the biofilter 5 from above or below the packing material in the biofilter zone through the manhole on the outer casing 8. Similarly, operators can access the activated carbon adsorption bed 7 from above or below the packing material in the activated carbon adsorption zone through the manhole on the outer casing 8.

[0061] The remaining parts that are the same as in Example 2 will not be repeated here.

[0062] Example 5:

[0063] See Figure 5 This embodiment provides another odor treatment device for sewage treatment plants. The difference from embodiment 1 is that the odor treatment device for sewage treatment plants in this embodiment does not have an ozone spray tower 6 installed between the biological filter 5 and the activated carbon adsorption bed 7. The outlet of the biological filter 5 is directly connected to the inlet of the activated carbon adsorption bed 7.

[0064] The odor treatment device for the wastewater treatment plant in this embodiment omits the ozone spray tower 6, thereby reducing the treatment process and manufacturing costs.

[0065] Furthermore, it should be noted that in this embodiment, odorous gas enters from the lower part of the activated carbon adsorption bed 7, and after being adsorbed by the activated carbon adsorbent in the middle, the odorous gas is discharged from the upper part of the activated carbon adsorption bed 7.

[0066] The remaining parts that are the same as in Example 1 will not be repeated here.

[0067] Example 6:

[0068] See Figure 6 This embodiment provides another odor treatment device for sewage treatment plants. The difference from embodiment 5 is that the odor enters the upper part of the activated carbon adsorption bed 7 in this embodiment, and after the odor is adsorbed by the activated carbon adsorbent in the middle, it is discharged from the lower part of the activated carbon adsorption bed 7.

[0069] The remaining parts that are the same as in Example 5 will not be repeated here.

[0070] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0072] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An odor treatment device for a wastewater treatment plant, characterized in that: It includes a heavy odor gas inlet pipe (1), a light odor gas inlet pipe (2), an outlet pipe (3), a biological spray tower (4), a biological filter (5), and an activated carbon adsorption bed (7); The heavy odor inlet pipe (1) is connected to the inlet end of the biological spray tower (4), the outlet end of the biological spray tower (4) is connected to the inlet end of the biological filter (5), the inlet end of the activated carbon adsorption bed (7) is divided into two branches, one of which is connected to the outlet end of the biological filter (5), and the other branch is connected to the light odor inlet pipe (2), and the outlet end of the activated carbon adsorption bed (7) is connected to the outlet pipe (3).

2. The odor treatment device for wastewater treatment plants as described in claim 1, characterized in that: It also includes ozone spray towers (6); The outlet of the biological filter (5) is connected to the inlet of the ozone spray tower (6), and the outlet of the ozone spray tower (6) is connected to the inlet of the activated carbon adsorption bed (7).

3. The odor treatment device for wastewater treatment plants as described in claim 2, characterized in that: It also includes an outer shell (8), the interior of which is divided into an operating area (9), a biological filter area and an activated carbon adsorption area; The operating area (9) is equipped with a biological spray tower (4) and an ozone spray tower (6), the biological filter area is equipped with a biological filter (5), the activated carbon adsorption area is equipped with an activated carbon adsorption bed (7), and the outer ports of the heavy odor gas inlet pipe (1), the light odor gas inlet pipe (2) and the outlet pipe (3) all pass through the outer shell (8).

4. The odor treatment device for wastewater treatment plants as described in claim 3, characterized in that: The outer shell (8) is a vertically placed cylindrical structure. The tube wall of the outer shell (8) has manholes corresponding to the operation area (9), the biological filter area and the activated carbon adsorption area, respectively. The manholes are covered with airtight doors.

5. The odor treatment device for wastewater treatment plants as described in claim 1, characterized in that: The biological filter (5) is equipped with a packing layer, and a biofilm is attached to the surface of the packing layer.

6. The odor treatment device for sewage treatment plants as described in claim 5, characterized in that: The filler layer is composed of one or more of the following: sponge, ceramsite, activated carbon particles, polyurethane foam particles, waste wood chips, bark, hay, and fibrous peat.

7. The odor treatment device for wastewater treatment plants as described in claim 2, characterized in that: The ozone spray tower (6) includes an ozone generator, an ozone injection device, and a spray tower; The ozone generator is located outside the spray tower and is connected to the ozone injection device via a pipeline. The ozone injection device is installed inside the spray tower.

8. The odor treatment device for sewage treatment plants as described in claim 1, characterized in that: The activated carbon adsorption bed (7) is a horizontal activated carbon adsorption bed.

9. The odor treatment device for sewage treatment plants as described in claim 8, characterized in that: The horizontal activated carbon adsorption bed includes a horizontal fixed bed and multiple adsorption units (11); The horizontal fixed bed is a horizontal cylindrical or rectangular box (10). The side of the box (10) is provided with a detection door. An adsorption unit (11) is detachably installed in each detection door. The adsorption unit (11) is filled with activated carbon adsorbent.

10. The odor treatment device for wastewater treatment plants as described in claim 2, characterized in that: It also includes an outer shell (8), the interior of which is divided into an operating area (9), a biological filter area and an activated carbon adsorption area; The operating area (9) is equipped with a biological spray tower (4) and an ozone spray tower (6). The entire biological filter area constitutes a biological filter (5), and the entire activated carbon adsorption area constitutes an activated carbon adsorption bed (7). The outer ports of the heavy odor inlet pipe (1), the light odor inlet pipe (2), and the outlet pipe (3) all pass through the outer shell (8).

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