Deodorization device for kitchen waste odor absorption and aerobic fermentation combined treatment

Abstract

The utility model discloses a kitchen waste odor absorption and aerobic fermentation combined treatment deodorization device, which relates to the technical field of kitchen waste odor treatment and comprises an odor collection system and an odor treatment system which are communicated through a pipeline, and the odor treatment system comprises a biological aerobic fermentation tower, an airflow membrane component and an activated carbon absorption tower. The biological aerobic fermentation tower is communicated with the activated carbon absorption tower through a pipeline; the biological aerobic fermentation tower comprises a tower body, a power stirring device arranged at the bottom of the tower body and a fermentation tower air outlet formed in one side of the top of the tower body, the airflow membrane assembly is arranged in the tower body and divides the interior of the tower body into a lower treatment cavity and an upper buffer cavity, and the fermentation tower air inlet is communicated with the treatment cavity through a ventilation rotary joint; the fermentation tower gas outlet is communicated with the buffer cavity. According to the utility model, the whole device is set as a totally-closed environment, so that the connection between the malodorous gas and the outside is reduced to the greatest extent, and any untreated gas is prevented from leaking into the environment.

Description

Technical Field

[0001] This utility model relates to the field of kitchen waste odor treatment technology, and more specifically to the field of a kitchen waste odor absorption and aerobic fermentation combined treatment deodorization device. Background Technology

[0002] Food waste treatment refers to the process of collecting, transporting, processing, and recycling organic waste generated in the catering industry, households, and food processing. This waste mainly includes food scraps, fruit peels, vegetable leaves, bones, and other organic matter. Due to its high moisture content, high organic matter content, and easy decomposition, especially since food waste contains high levels of protein and oil, it is highly susceptible to producing sulfurous odors. Improper handling can easily lead to environmental pollution and public health problems.

[0003] Patent publication number CN115634902A, entitled "Food Waste Treatment Process and Food Waste Treatment System," discloses the following: In existing food waste treatment methods, the generated odor is directly treated by adsorption using adsorbents such as activated carbon. When the odor contains colloidal substances or other impurities, the adsorbent is prone to failure and blockage, affecting the original ventilation system. High humidity in the exhaust gas can also cause the adsorbent to fail. Odor treatment is affected by the climate environment; factors such as temperature, humidity, and wind speed can affect microbial activity and odor diffusion, thus affecting the efficiency and effectiveness of odor treatment.

[0004] Patent publication number CN108503397A, entitled "A Household Kitchen Waste Disposal Machine and a Kitchen Waste Disposal Method," discloses the following: A household kitchen waste disposal machine and a kitchen waste disposal method. It includes a PLC system and a crushing device, a tiered composting bin, and a deodorization system connected to the PLC system. The crushing device is connected to the tiered composting bin, and its installation position is higher than the height of the tiered composting bin, allowing the material from the crushing device to enter the tiered composting bin under gravity. The deodorization system is connected to both the crushing device and the tiered composting bin. This invention uses a crushing device and a tiered composting bin to crush and compost kitchen waste. The crushing device first crushes the kitchen waste to below 5mm, and then it is fermented in the tiered composting bin. A small amount of odorous gas generated during the crushing and fermentation process is deodorized and sterilized by ultraviolet light before being discharged. The entire crushing, tiered composting, and deodorization process is controlled by a PLC system.

[0005] The aforementioned patents and existing designs neglect odor control. Food waste treatment equipment does not consider odor generation and is open-type. Utility Model Content

[0006] The purpose of this utility model is to provide a deodorization device that combines odor absorption and aerobic fermentation of kitchen waste in order to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] This utility model provides a deodorization device for combined treatment of odor absorption and aerobic fermentation of kitchen waste, including an odor collection system and an odor treatment system connected by a pipeline. The odor treatment system includes a biological aerobic fermentation tower, an airflow membrane component and an activated carbon adsorption tower. The biological aerobic fermentation tower and the activated carbon adsorption tower are connected by a third ventilation pipeline.

[0009] The aerobic biological fermentation tower includes a tower body, a biological fermentation tower support frame installed on the outer wall of the tower body, a power stirring device installed at the bottom of the tower body, a fermentation tower air inlet, and a fermentation tower air outlet installed on one side of the top of the tower body. An airflow membrane assembly is installed inside the tower body, dividing the interior of the tower body into a lower processing chamber and an upper buffer chamber. The fermentation tower air inlet is connected to the processing chamber through a venting rotary joint, and the fermentation tower air outlet is connected to the buffer chamber.

[0010] Specifically, during operation, the odor generated during the food waste treatment process is first drawn into the aerobic biological fermentation tower via an exhaust fan and ventilation duct. An airflow membrane module traps large odor molecules such as hydrogen sulfide and ammonia within the treatment chamber. Inside the chamber, phosphogypsum and aerobic microorganisms transform the odor into odorless or low-odor gases. Subsequently, smaller molecules such as water vapor and air pass through the airflow membrane module, and the gas is then piped to an activated carbon adsorption tower for further removal of odor components before being safely discharged through the pipeline.

[0011] By setting the entire device in a fully enclosed environment, the connection between odorous gases and the outside world is minimized. During the treatment process, it is ensured that all odorous gases generated are completely collected and treated, preventing any untreated gases from leaking into the environment and reducing the impact on the lives of surrounding residents.

[0012] In one embodiment, the airflow membrane assembly includes an annular mounting frame and an airflow membrane covering the annular mounting frame. An annular mounting platform adapted to the annular mounting frame is provided inside the tower body near the top of the tower. An O-ring seal is provided between the annular mounting frame and the annular mounting platform.

[0013] In one embodiment, the tower body is provided with an upwardly protruding perforated mounting frame, and the airflow membrane assembly includes an airflow membrane covering the perforated mounting frame and a compression sealing assembly for sealing the edge of the airflow membrane against the inner wall of the tower body.

[0014] In one embodiment, the tower body includes a bottom bio-fermentation tower chamber and a bio-fermentation tower chamber cover disposed on top of the bio-fermentation tower chamber, the bio-fermentation tower chamber and the bio-fermentation tower chamber cover being locked together by a plurality of second snap fasteners.

[0015] In one embodiment, the odor collection system includes a food waste treatment center, a treatment center cover, a first ventilation duct, and an exhaust fan. The side wall of the food waste treatment center is provided with a food waste treatment center door, and the food waste treatment center door is provided with a food waste treatment center door handle. The top of the food waste treatment center is provided with a treatment center cover, and the food waste treatment center and the treatment center cover are locked together by a first buckle. The top of the treatment center cover is provided with an air outlet, the first ventilation duct is connected to the air outlet, and the exhaust fan is installed on the first ventilation duct.

[0016] In one embodiment, the exhaust port of the exhaust fan is connected to the ventilation rotary joint at the bottom of the aerobic biological fermentation tower via a second ventilation pipe.

[0017] In one embodiment, the bio-fermentation apparatus further includes a ventilating and stirring rod disposed at the bottom of the processing chamber. The ventilating and stirring rod is connected to a motor via a ventilating rotary joint. The ventilating and stirring rod is provided with a plurality of vent holes, the diameter of which increases sequentially from bottom to top.

[0018] In one embodiment, the venting rotary joint includes a venting rotary joint housing and a venting rotary joint rotor disposed within the venting rotary joint housing. The venting rotary joint rotor is movably disposed within the venting rotary joint housing via an upper bearing and a lower bearing. A motor drives the venting rotary joint rotor to rotate. The top of the venting rotary joint rotor is connected to a venting stirring connecting rod. An annular air inlet chamber sealed by a rotating sealing ring is provided on the side wall between the venting rotary joint housing and the venting rotary joint rotor. An internal venting channel is provided on the venting rotary joint rotor, with one end communicating with the annular air inlet chamber and the other end communicating with the interior of the venting stirring connecting rod. An air inlet communicating with the annular air inlet chamber is provided on the venting rotary joint housing. A second venting pipe is sealed and connected to the air inlet of the fermentation tower.

[0019] In one embodiment, the activated carbon adsorption tower includes an outer shell, an adsorption tower cover disposed on the top of the outer shell, an adsorption air inlet disposed on the bottom of the outer shell, an adsorption exhaust outlet disposed on the adsorption tower cover, and multiple activated carbon layers disposed inside the outer shell. The multiple activated carbon layers are arranged side by side along the airflow direction. An activated carbon adsorption tower frame is disposed on the outer wall of the outer shell. The adsorption air inlet is connected to the air outlet on one side of the top of the tower through a third ventilation pipe.

[0020] In one embodiment, the outer shell and the adsorption tower compartment cover are locked together by multiple third snaps, and the particle diameter of the multi-layer activated carbon layer gradually decreases along the airflow direction.

[0021] In addition, odorous gases are introduced into the aerobic fermentation material. The material is a mixture of 70% cow manure, 10% tobacco dust, 15% straw, and 5% phosphogypsum for fermentation. This ratio optimizes the carbon-nitrogen ratio of the fermentation material, resulting in higher microbial activity and a stronger ability to metabolize odorous gases. Simultaneously, phosphogypsum helps regulate the pH of the raw materials, lowering the pH and improving adsorption efficiency. Furthermore, the calcium in phosphogypsum... 2+ It exhibits strong adsorption capacity for sulfur-containing odors, reducing their emissions. Under these conditions, microbial transformation further reduces odor emissions, followed by secondary adsorption treatment with activated carbon. This method offers advantages such as high safety, simple process, and low investment cost, and is primarily used in centralized food waste treatment areas.

[0022] The beneficial effects of this utility model are as follows:

[0023] 1. During the treatment of kitchen waste, the odorous gases are first drawn into the aerobic biological fermentation tower via a ventilation duct by a blower. The airflow membrane module traps large odor molecules within the treatment chamber. Inside, phosphogypsum and aerobic microorganisms work together to reduce the odor to an odorless or low-odor level. Subsequently, smaller molecules such as water vapor and air pass through the airflow membrane module, and the gas is then drawn into an activated carbon adsorption tower by the blower for further removal of odor components before being safely discharged through a pipeline.

[0024] 2. The entire device is set up as a fully enclosed environment, which minimizes the connection between odorous gases and the outside world. During the treatment process, it can ensure that all odorous gases generated are completely collected and treated, preventing any untreated gases from leaking into the environment and reducing the impact on the lives of surrounding residents. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a cross-sectional view of the structure of this utility model patent;

[0028] Figure 3 This is a cross-sectional view of the ventilation rotary joint structure of this utility model patent;

[0029] Attached reference numerals: 1-Food waste treatment center, 2-Food waste treatment center compartment door, 3-Food waste treatment center compartment door handle, 4-First buckle, 5-Treatment center compartment cover, 6-First ventilation pipe, 7-Exhaust fan, 8-Bio-fermentation tower support frame, 9-Second ventilation pipe, 10-Bio-fermentation tower, 11-Bio-fermentation tower compartment cover, 12-Bio-fermentation tower compartment door, 13-Second buckle, 14-Bio-fermentation tower compartment door handle, 15-Third ventilation pipe, 16-Third buckle, 17-Adsorption exhaust port, 18-Adsorption tower compartment cover, 19-Activated carbon adsorption tower, 20-Activated carbon adsorption tower frame, 21-Motor, 22-Ventilation rotary joint, 23-Airflow membrane assembly, 24-Ventilation stirring rod, 25-Ventilation rotary joint housing, 26-Rotation sealing ring, 27-Upper bearing, 28-Ventilation rotary joint rotor, 29-Lower bearing. Detailed Implementation

[0030] To make the technical problems, technical solutions, and technical effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Example 1

[0035] This embodiment provides a deodorization device for combined treatment of odor absorption and aerobic fermentation of kitchen waste, including an odor collection system and an odor treatment system connected by a pipeline. The odor treatment system includes a biological aerobic fermentation tower 10, an airflow membrane component 23 and an activated carbon adsorption tower 19. The biological aerobic fermentation tower 10 and the activated carbon adsorption tower 19 are connected by a third ventilation pipe 15.

[0036] The aerobic biological fermentation tower 10 includes a tower body, a biological fermentation tower support frame installed on the outer wall of the tower body, a power stirring device installed at the bottom of the tower body, a fermentation tower air inlet, and a fermentation tower air outlet installed on one side of the top of the tower body. An airflow membrane assembly 23 is installed inside the tower body, dividing the interior of the tower body into a lower processing chamber and an upper buffer chamber. The fermentation tower air inlet is connected to the processing chamber through a venting rotary joint 22, and the fermentation tower air outlet is connected to the buffer chamber.

[0037] In this embodiment, the odor generated during the food waste treatment process is first drawn into the aerobic biological fermentation tower via an exhaust fan and ventilation duct. An airflow membrane module traps large odor molecules such as hydrogen sulfide and ammonia within the treatment chamber. Inside the chamber, phosphogypsum and aerobic microorganisms transform the odor into odorless or low-odor gases. Subsequently, smaller molecules such as water vapor and air pass through the airflow membrane module, and the gas is then piped to an activated carbon adsorption tower for further odor removal before being safely discharged through a pipeline.

[0038] By setting the entire device in a fully enclosed environment, the connection between odorous gases and the outside world is minimized. This ensures that all odorous gases generated during the treatment process are completely collected and treated, preventing any untreated gases from leaking into the environment and reducing the impact on the lives of surrounding residents.

[0039] Example 2

[0040] This embodiment provides a deodorization device for combined treatment of odor absorption and aerobic fermentation of kitchen waste, including an odor collection system and an odor treatment system connected by a pipeline. The odor treatment system includes a biological aerobic fermentation tower 10, an airflow membrane component 23 and an activated carbon adsorption tower 19. The biological aerobic fermentation tower 10 and the activated carbon adsorption tower 19 are connected by a third ventilation pipe 15.

[0041] The aerobic biological fermentation tower 10 includes a tower body, a biological fermentation tower support frame installed on the outer wall of the tower body, a power stirring device installed at the bottom of the tower body, a fermentation tower air inlet, and a fermentation tower air outlet installed on one side of the top of the tower body. An airflow membrane assembly 23 is installed inside the tower body, dividing the interior of the tower body into a lower processing chamber and an upper buffer chamber. The fermentation tower air inlet is connected to the processing chamber through a venting rotary joint 22, and the fermentation tower air outlet is connected to the buffer chamber.

[0042] The airflow membrane assembly 23 includes an annular mounting frame and an airflow membrane covering the annular mounting frame. An annular mounting platform adapted to the annular mounting frame is provided inside the tower body near the top of the tower. There is an O-ring seal between the annular mounting frame and the annular mounting platform.

[0043] Example 3

[0044] This embodiment provides a deodorization device for combined treatment of odor absorption and aerobic fermentation of kitchen waste, including an odor collection system and an odor treatment system connected by a pipeline. The odor treatment system includes a biological aerobic fermentation tower 10, an airflow membrane component 23 and an activated carbon adsorption tower 19. The biological aerobic fermentation tower 10 and the activated carbon adsorption tower 19 are connected by a third ventilation pipe 15.

[0045] The aerobic biological fermentation tower 10 includes a tower body, a biological fermentation tower support frame installed on the outer wall of the tower body, a power stirring device installed at the bottom of the tower body, a fermentation tower air inlet, and a fermentation tower air outlet installed on one side of the top of the tower body. An airflow membrane assembly 23 is installed inside the tower body, dividing the interior of the tower body into a lower processing chamber and an upper buffer chamber. The fermentation tower air inlet is connected to the processing chamber through a venting rotary joint 22, and the fermentation tower air outlet is connected to the buffer chamber.

[0046] The tower body is provided with an upwardly protruding perforated mounting frame. The airflow membrane assembly 23 includes an airflow membrane covering the perforated mounting frame and a compression sealing assembly for sealing the edge of the airflow membrane against the inner wall of the tower body.

[0047] The tower body includes a bottom bio-fermentation tower chamber and a bio-fermentation tower chamber cover 11 set on top of the bio-fermentation tower chamber. The bio-fermentation tower chamber and the bio-fermentation tower chamber cover 11 are locked together by multiple second buckles.

[0048] Example 4

[0049] This embodiment is a further optimization based on embodiment 2 or embodiment 3, specifically:

[0050] The odor collection system includes a food waste treatment center 1, a treatment center cover 5, a first ventilation pipe 6, and an exhaust fan 7. The side wall of the food waste treatment center 1 is equipped with a food waste treatment center door 2, and the food waste treatment center door 2 is equipped with a food waste treatment center door handle 3. The top of the food waste treatment center 1 is equipped with a treatment center cover 5. The food waste treatment center 1 and the treatment center cover 5 are locked together by a first buckle. The top of the treatment center cover 5 is equipped with an air outlet, and the first ventilation pipe 6 is connected to the air outlet. The exhaust fan 7 is installed on the first ventilation pipe 6.

[0051] The exhaust port of the exhaust fan 7 is connected to the ventilation rotary joint 22 at the bottom of the biological aerobic fermentation tower 10 through the second ventilation pipe 9.

[0052] Example 5

[0053] This embodiment is a further optimization based on embodiment 4, specifically:

[0054] The bio-fermentation device also includes an aeration and stirring rod 24 located at the bottom of the processing chamber. The aeration and stirring rod 24 is connected to the motor 21 via an aeration rotary joint 22. The aeration and stirring rod 24 is provided with several venting holes, the diameter of which increases sequentially from bottom to top.

[0055] The venting rotary joint 22 includes a venting rotary joint housing 25 and a venting rotary joint rotor 28 disposed within the venting rotary joint housing 25. The venting rotary joint rotor 28 is movably disposed within the venting rotary joint housing 25 via an upper bearing 27 and a lower bearing 29. A motor drives the venting rotary joint rotor 28 to rotate. The top of the venting rotary joint rotor 28 is connected to the venting stirring connecting rod 24. An annular air inlet chamber is provided on the side wall between the venting rotary joint housing 25 and the venting rotary joint rotor 28, which is sealed by a rotating sealing ring 26. An internal venting channel is provided on the venting rotary joint rotor 28, with one end communicating with the annular air inlet chamber and the other end communicating with the interior of the venting stirring connecting rod 24. An air inlet communicating with the annular air inlet chamber is provided on the venting rotary joint housing 25. The second venting pipe 9 is sealed and connected to the air inlet of the fermentation tower.

[0056] Example 6

[0057] This embodiment is a further optimization based on embodiment 4, specifically:

[0058] The activated carbon adsorption tower 19 includes an outer shell, an adsorption tower cover 18 disposed on the top of the outer shell, an adsorption air inlet disposed at the bottom of the outer shell, an adsorption exhaust outlet 17 disposed on the adsorption tower cover 18, and multiple activated carbon layers disposed inside the outer shell. The multiple activated carbon layers are arranged side by side along the airflow direction. An activated carbon adsorption tower frame 20 is disposed on the outer wall of the outer shell. The adsorption air inlet is connected to the air outlet on one side of the top of the tower through a third ventilation pipe 15.

[0059] The outer shell and the adsorption tower cover are locked together by multiple third buckles, and the particle diameter of the multi-layer activated carbon layer gradually decreases along the airflow direction.

[0060] In this embodiment, odorous gas is introduced into the aerobic fermentation material. The material is a mixture of 70% cow dung, 10% tobacco dust, 15% straw, and 5% phosphogypsum for fermentation. This ratio optimizes the carbon-nitrogen ratio of the fermentation material, resulting in higher microbial activity and a stronger ability to metabolize odorous gases under this environment. Simultaneously, phosphogypsum regulates the pH of the raw materials, lowering the pH and improving the adsorption effect. Furthermore, the calcium contained in phosphogypsum... 2+It exhibits strong adsorption capacity for sulfur-containing odors, reducing their emissions. Under these conditions, microbial transformation further reduces odor emissions, followed by secondary adsorption treatment with activated carbon. This method offers advantages such as high safety, simple process, and low investment cost, and is primarily used in centralized food waste treatment areas.

Claims

1. A deodorization device for combined odor absorption and aerobic fermentation of kitchen waste, characterized in that, It includes an odor collection system and an odor treatment system connected by a pipeline. The odor treatment system includes a biological aerobic fermentation tower (10), an airflow membrane module (23), and an activated carbon adsorption tower (19). The biological aerobic fermentation tower (10) and the activated carbon adsorption tower (19) are connected by a third ventilation pipe (15). The aerobic biological fermentation tower (10) includes a tower body, a biological fermentation tower support frame disposed on the outer wall of the tower body, a power stirring device disposed at the bottom of the tower body, a fermentation tower air inlet, and a fermentation tower air outlet disposed on one side of the top of the tower body. The airflow membrane assembly (23) is disposed in the tower body, dividing the interior of the tower body into a lower processing chamber and an upper buffer chamber. The fermentation tower air inlet is connected to the processing chamber through a venting rotary joint (22), and the fermentation tower air outlet is connected to the buffer chamber.

2. The kitchen waste odor absorbing and aerobic fermentation combined treatment deodorization device according to claim 1, characterized in that, The airflow membrane assembly (23) includes an annular mounting frame and an airflow membrane covering the annular mounting frame. An annular mounting platform adapted to the annular mounting frame is provided inside the tower body near the top of the tower. An O-ring seal is provided between the annular mounting frame and the annular mounting platform.

3. The kitchen waste odor absorbing and aerobic fermentation combined treatment deodorization device according to claim 1, characterized in that, The tower body is provided with an upwardly protruding perforated mounting frame, and the airflow membrane assembly (23) includes an airflow membrane covering the perforated mounting frame and a compression sealing assembly for sealing the edge of the airflow membrane with the inner wall of the tower body.

4. The kitchen waste odor absorbing and aerobic fermentation combined treatment deodorization device according to any one of claims 1-3, characterized in that, The tower body includes a bottom bio-fermentation tower chamber and a bio-fermentation tower chamber cover (11) located on top of the bio-fermentation tower chamber. The bio-fermentation tower chamber and the bio-fermentation tower chamber cover (11) are locked together by multiple second buckles.

5. The kitchen waste odor absorbing and aerobic fermentation combined treatment deodorization device according to claim 1, characterized in that, The odor collection system includes a food waste treatment center (1), a treatment center cover (5), a first ventilation pipe (6), and an exhaust fan (7). The side wall of the food waste treatment center (1) is provided with a food waste treatment center door (2), and the food waste treatment center door (2) is provided with a food waste treatment center door handle (3). The top of the food waste treatment center (1) is provided with a treatment center cover (5). The food waste treatment center (1) and the treatment center cover (5) are locked together by a first buckle. The top of the treatment center cover (5) is provided with an air outlet. The first ventilation pipe (6) is connected to the air outlet. The exhaust fan (7) is installed on the first ventilation pipe (6).

6. The kitchen waste odor absorbing and aerobic fermentation combined treatment deodorization device according to claim 5, characterized in that, The exhaust port of the exhaust fan (7) is connected to the ventilation rotary joint (22) at the bottom of the biological aerobic fermentation tower (10) through the second ventilation pipe (9).

7. The kitchen waste odor absorbing and aerobic fermentation combined treatment deodorization device according to claim 6, characterized in that, The bio-fermentation device also includes an aeration stirring rod (24) disposed at the bottom of the processing chamber. The aeration stirring rod (24) is connected to the motor (21) through an aeration rotary joint (22). The aeration stirring rod (24) is provided with a plurality of venting holes, the diameter of which increases sequentially from bottom to top.

8. The kitchen waste odor absorbing and aerobic fermentation combined treatment deodorization device according to claim 7, characterized in that, The venting rotary joint (22) includes a venting rotary joint housing (25) and a venting rotary joint rotor (28) disposed within the venting rotary joint housing (25). The venting rotary joint rotor (28) is movably disposed within the venting rotary joint housing (25) via an upper bearing (27) and a lower bearing (29). The motor drives the venting rotary joint rotor (28) to rotate. The top of the venting rotary joint rotor (28) is connected to the venting stirring connecting rod (24). An annular air inlet chamber is provided on the side wall between the ventilating rotary joint housing (25) and the ventilating rotary joint rotor (28), which is sealed by a rotating sealing ring (26). An internal air passage is provided on the ventilating rotary joint rotor (28), one end of which is connected to the annular air inlet chamber and the other end of which is connected to the interior of the ventilating stirring connecting rod (24). An air inlet is provided on the ventilating rotary joint housing (25), which is connected to the annular air inlet chamber. The second ventilating pipe (9) is sealed and connected to the air inlet of the fermentation tower.

9. The deodorization device for combined odor absorption and aerobic fermentation of kitchen waste according to claim 4, characterized in that, The activated carbon adsorption tower (19) includes an outer shell, an adsorption tower cover (18) on the top of the outer shell, an adsorption air inlet on the bottom of the outer shell, an adsorption exhaust outlet (17) on the adsorption tower cover (18), and multiple layers of activated carbon in the outer shell. The multiple layers of activated carbon are arranged side by side along the airflow direction. An activated carbon adsorption tower frame (20) is provided on the outer wall of the outer shell. The adsorption air inlet is connected to the air outlet on one side of the top of the tower through the third ventilation pipe (15).

10. The kitchen waste odor absorbing and aerobic fermentation combined treatment deodorization device according to claim 9, characterized in that, The outer shell and the adsorption tower cover are locked together by multiple third buckles, and the particle diameter of the multiple layers of activated carbon gradually decreases along the airflow direction.

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