Multi-effect synergistic air deodorization control method

Abstract

The invention belongs to the technical field of air purification, and particularly discloses a multi-effect cooperative air deodorization control method which comprises the following steps: collecting peculiar smell gas concentration, temperature and humidity parameters of to-be-treated air through an intelligent sensing module; the collected parameters are transmitted to the central control module, and a regulation and control instruction is generated after the collected parameters are compared with a preset threshold value; to-be-treated air sequentially passes through the pre-filtering unit, the composite adsorption unit, the photocatalytic oxidation unit and the biodegradation unit to be subjected to graded purification; the central control module dynamically adjusts the operation parameters of the pre-filtering unit, the composite adsorption unit, the photocatalytic oxidation unit and the biodegradation unit according to the real-time parameters, and purified air is discharged after being detected to reach the standard. According to the multi-effect cooperative air deodorization control method, the four-stage composite purification system is adopted for achieving the synergistic effect, the removal rate of peculiar smell gas is increased, different-concentration peculiar smell scenes and different-temperature and different-humidity environments can be adapted through intelligent regulation and control, and the problem of secondary pollution is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air purification, in particular to a multi-effect synergistic air deodorization control method. BACKGROUND

[0002] Air odor widely exists in home life, food processing, garbage disposal, chemical production and other scenes, mainly from pollutants such as ammonia, hydrogen sulfide, formaldehyde, volatile organic compounds (VOCs) and the like. These odor gases not only affect human sensory experience, but also cause respiratory diseases, nervous system damage and other health problems after long-term exposure, and in industrial scenes, may cause product quality decline, production environment not up to standard and other problems.

[0003] The existing air deodorization methods mainly include physical adsorption method, chemical oxidation method, biological degradation method and single photocatalysis method. The physical adsorption method (such as activated carbon adsorption) is simple to operate, but has limited adsorption capacity, is easy to saturate, needs to replace the adsorption material frequently, and has high long-term operation cost; the chemical oxidation method has high deodorization efficiency, but is easy to cause secondary pollution, and has strong corrosion to the equipment; the biological degradation method is environmentally friendly, but has slow reaction rate, and has strict requirements on environmental conditions such as temperature and humidity, and poor adaptability; the single photocatalysis method is limited by the wavelength of the light source and the activity of the catalyst, and has poor removal effect on complex mixed odor gases, and has high energy consumption in the low-concentration odor scene.

[0004] In addition, the existing deodorization methods mostly adopt a fixed parameter operation mode, which cannot dynamically adjust the operation state according to the odor concentration, environmental temperature and humidity and other real-time working conditions, resulting in incomplete treatment in the high-concentration odor scene, and serious energy waste in the low-concentration odor scene. Therefore, developing an air deodorization control method with high efficiency, energy saving, environmental protection and self-adaptation to different working conditions has become a technical problem to be solved in the current industry. SUMMARY

[0005] The purpose of the present application is to provide a multi-effect synergistic air deodorization control method, which aims at the problems of low efficiency, poor adaptability, high operation cost and easy secondary pollution of the existing deodorization methods, and realizes precise and efficient treatment of odor gases with different concentrations and different components by integrating a composite purification mechanism and a control system, while reducing the operation energy consumption and maintenance cost.

[0006] To achieve the above purpose, the present application provides a multi-effect synergistic air deodorization control method, which is realized by using an air deodorization integrated system. The air deodorization integrated system is sequentially provided with a pre-filtering unit, a composite adsorption unit, a photocatalytic oxidation unit, a biological degradation unit and a centrifugal fan from an air inlet to an air outlet. The pre-filtering unit, the composite adsorption unit, the photocatalytic oxidation unit and the biological degradation unit are respectively connected by flanges, which are convenient for disassembly and maintenance. The air deodorization integrated system further comprises an intelligent sensing module and a central control module. The control method includes the following steps: Step 1: Collect the odor gas concentration, temperature, and humidity parameters of the air to be treated through the intelligent sensing module; Step 2: Transmit the collected parameters to the central control module, compare them with the preset threshold, and generate control commands; Step 3: The air to be treated is sequentially purified through a pre-filtration unit, a composite adsorption unit, a photocatalytic oxidation unit, and a biodegradation unit. Step 4: The central control module dynamically adjusts the operating parameters of the pre-filtration unit, composite adsorption unit, photocatalytic oxidation unit, and biodegradation unit based on real-time parameters. The purified air is discharged after passing the test.

[0007] Preferably, the pre-filtration unit uses a high-efficiency particulate filter with a filtration accuracy of 0.3μm and an initial resistance of ≤50Pa.

[0008] Preferably, the composite adsorption unit uses a modified activated carbon-molecular sieve composite adsorption material, wherein the activated carbon is modified by a nitric acid-hydrogen peroxide mixed solution, and the mass ratio of activated carbon to molecular sieve is 3:1.

[0009] Preferably, the photocatalytic oxidation unit adopts a quartz reaction chamber, with the inner wall coated with a titanium dioxide-graphene composite photocatalyst, and multiple 254nm ultraviolet lamps and multiple 405nm visible light LEDs are uniformly arranged inside the chamber.

[0010] Preferably, the coating thickness of the titanium dioxide-graphene composite photocatalyst is 20-30 μm.

[0011] Preferably, the biodegradation unit adopts a cuboid cavity, which is filled with porous ceramic particles loaded with composite microbial agents. Temperature sensors, humidity sensors, heating elements, and humidifiers are installed inside the cavity to achieve temperature and humidity control.

[0012] Preferably, the compound microbial agent includes Pseudomonas, Bacillus, and Yeast, with a colony count ratio of Pseudomonas:Bacillus:Yeast of 2:1:1.

[0013] Preferably, the intelligent sensing module includes an ammonia sensor, a hydrogen sulfide sensor, a formaldehyde sensor, and a temperature and humidity sensor.

[0014] Preferably, in step 1, the odorous gases include ammonia, hydrogen sulfide, formaldehyde, and volatile organic compounds.

[0015] Preferably, in step 4, the control logic of the central control module is as follows: when the odor gas concentration is lower than the first threshold, only the pre-filtration unit and the composite adsorption unit are activated; when the odor gas concentration is between the first threshold and the second threshold, the pre-filtration unit, the composite adsorption unit, and the photocatalytic oxidation unit are activated; when the odor gas concentration is higher than the second threshold, all of the pre-filtration unit, the composite adsorption unit, the photocatalytic oxidation unit, and the biodegradation unit are activated.

[0016] The advantages and beneficial effects of the multi-effect synergistic air deodorization control method described above are as follows: 1. This invention employs a four-stage composite purification system to work synergistically, thereby improving the removal rate of mixed odor gases such as ammonia, hydrogen sulfide, formaldehyde, and VOCs, which is higher than that of traditional single methods.

[0017] 2. The intelligent control system of this invention dynamically adjusts operating parameters according to real-time working conditions, reducing energy consumption compared to traditional equipment operating with fixed parameters. It can adapt to different odor concentrations and varying temperature and humidity environments through intelligent control, making it suitable for multiple fields such as home, industry, and environmental protection.

[0018] 3. This invention avoids the secondary pollution problem of chemical oxidation method, realizes the resource utilization of pollutants in biodegradation unit, and extends the replacement cycle of adsorption material due to photocatalytic regeneration of composite adsorption unit, thereby reducing the amount of solid waste generated.

[0019] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the control method of the present invention. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] The following examples are not intended to limit the invention, but are only for illustration. Unless otherwise specified, the experimental methods used in the following examples are generally performed under conventional conditions. Unless otherwise specified, the materials and reagents used in the following examples are commercially available.

[0024] Example 1 A multi-effect synergistic air deodorization control method is implemented using an integrated air deodorization system. The integrated air deodorization system is arranged sequentially from the air inlet to the air outlet, including a pre-filtration unit, a composite adsorption unit, a photocatalytic oxidation unit, a biodegradation unit, and a centrifugal fan. The pre-filtration unit, composite adsorption unit, photocatalytic oxidation unit, and biodegradation unit are connected by flanges for easy disassembly and maintenance. The integrated air deodorization system also includes an intelligent sensing module and a central control module.

[0025] The pre-filtration unit uses a high-efficiency particulate filter (HEPA filter, H11 grade) with a filtration accuracy of 0.3μm and an initial resistance of ≤50Pa.

[0026] The composite adsorption unit employs a modified activated carbon-molecular sieve composite adsorption material, wherein the activated carbon is modified with a nitric acid-hydrogen peroxide mixed solution. This modification treatment of the activated carbon constructs more microporous structures and oxygen-containing functional groups on its surface, increasing the adsorption capacity by more than 40% compared to unmodified activated carbon. The activated carbon to molecular sieve mass ratio is 3:1, balancing adsorption rate and selectivity. The adsorption layer thickness is 5-8 cm, and the space velocity is 1000-1500 h⁻¹. -1 This ensures that the odorous gas comes into full contact with the adsorption material while avoiding excessive pressure loss.

[0027] The photocatalytic oxidation unit employs a quartz reaction chamber, with its inner wall coated with a titanium dioxide-graphene composite photocatalyst. Multiple 254nm ultraviolet lamps and multiple 405nm visible light LEDs are uniformly arranged within the chamber, with the ultraviolet lamps and LEDs arranged alternately. The titanium dioxide-graphene composite photocatalyst utilizes the high conductivity of graphene to promote the separation of photogenerated electron-hole pairs, resulting in improved catalyst activity compared to pure titanium dioxide. Combined with the 254nm ultraviolet lamps and 405nm visible light LEDs, the ultraviolet light excites the catalyst to generate active oxygen, while the visible light enhances the catalyst's selectivity for complex gases, ensuring efficient oxidation and decomposition.

[0028] The coating thickness of the titanium dioxide-graphene composite photocatalyst is 20-30 μm.

[0029] The biodegradation unit adopts a rectangular cavity, which is filled with porous ceramic particles loaded with composite microbial agents. Temperature sensors, humidity sensors, heating elements, and humidifiers are installed inside the cavity to achieve temperature and humidity control.

[0030] The compound microbial agent includes *Pseudomonas*, *Bacillus*, and *Saccharomyces*, with a colony count ratio of *Pseudomonas*:*Bacillus:*Saccharomyces of yeast of 2:1:1. *Pseudomonas* efficiently degrades hydrogen sulfide, *Bacillus* degrades ammonia, and *Saccharomyces* degrades VOCs, achieving comprehensive treatment of mixed odors. The carrier is porous ceramsite, with a loading density of 0.6-0.8 g / cm³ after loading the microbial agent. 3 During operation, the temperature inside the unit is controlled at 25-35℃ and the humidity is controlled at 50%-60% through the temperature control module. Under these conditions, the microbial metabolic activity is the highest and the degradation rate is 30% higher than that of the conventional environment.

[0031] The intelligent sensing module includes an ammonia sensor, a hydrogen sulfide sensor, a formaldehyde sensor, and a temperature and humidity sensor. The central controller is electrically connected to each unit actuator (fan, light source, heating element, humidifier). Two levels of odor concentration thresholds are set: the first threshold is the upper limit for human sensory comfort and compliance with hygiene standards (ammonia ≤ 0.5 ppm, hydrogen sulfide ≤ 0.01 ppm, formaldehyde ≤ 0.08 ppm); the second threshold is the temporary upper limit allowed in industrial settings (ammonia ≤ 5 ppm, hydrogen sulfide ≤ 0.5 ppm, formaldehyde ≤ 0.5 ppm). Based on real-time sensor data, the central control module adjusts unit start / stop and parameters according to a logic of low-concentration energy-saving operation, medium-concentration high-efficiency operation, and high-concentration full-load operation, achieving adaptive regulation.

[0032] Control methods such as Figure 1 As shown, it includes the following steps: Step 1: Intelligent sensing activation and parameter acquisition. The intelligent sensing module collects the concentration of odorous gases (ammonia, hydrogen sulfide, formaldehyde, volatile organic compounds), temperature, and humidity parameters of the air to be treated. Before data acquisition, the sensor is zero-point calibrated to ensure detection accuracy.

[0033] Step 2: Data processing and control command generation. After receiving the collected data, the central control module removes outliers and calculates the average value, comparing it with two preset thresholds: when the concentration is lower than the first threshold (ammonia ≤ 0.5 ppm, hydrogen sulfide ≤ 0.01 ppm, formaldehyde ≤ 0.08 ppm), an "energy-saving operation" command is generated; when the concentration is between the first and second thresholds (ammonia ≤ 5 ppm, hydrogen sulfide ≤ 0.5 ppm, formaldehyde ≤ 0.5 ppm), an efficient operation command is generated; when the concentration is higher than the second threshold, a full-load operation command is generated.

[0034] Step 3: The air to be treated is processed according to the following procedure: ① Pre-filtration unit: The air first passes through a HEPA filter (H11 grade) to remove dust and particulate matter with a particle size ≥0.3μm, with an initial resistance ≤50Pa; ② Composite adsorption unit: After pre-treatment, the air flows through a modified activated carbon-molecular sieve composite adsorption material (mass ratio 3:1, adsorption layer thickness 5-8cm), with the air velocity adjusted to 800-1500 h⁻¹ as instructed. -1 ① Rapidly adsorbs odor components; ② Photocatalytic oxidation unit: Starts and stops according to instructions, using a titanium dioxide-graphene composite photocatalyst (coating thickness 20-30μm), combined with a 254nm ultraviolet lamp and a 405nm LED lamp light source, with power adjusted to 70%-100% of rated power according to instructions, and a reaction residence time of 2-3s, oxidizing and decomposing the adsorbed odor and regenerating the adsorption sites; ③ Biodegradation unit: Starts and stops according to instructions, with air flowing through a porous ceramic carrier loaded with composite bacterial agent (bacterial agent ratio 2:1:1), and the temperature and humidity inside the unit adjusted to 25-35℃ and 50%-60% according to instructions, deeply degrading residual odor.

[0035] Step 4: Dynamic control and emission compliance. The central control module updates parameters and adjusts the operating status every 5 seconds. When the concentration fluctuates, the reverse switching mode is delayed by 10-15 seconds to avoid frequent start-stop. After purification, the air is detected by the outlet sensor. If it meets the standard (the concentration of each component is lower than the first threshold), it is discharged. If it does not meet the standard, it is returned to the composite adsorption unit for secondary treatment.

[0036] The system employs a four-stage purification model, with each unit performing its specific function while working collaboratively. The pre-filtration unit, acting as front-end protection, primarily removes particulate matter such as dust, hair, and fibers from the air, preventing clogging of subsequent adsorption units, deactivation of photocatalytic catalysts due to dust accumulation, and contamination of the biological unit carrier, ensuring stable operation of downstream units. The composite adsorption unit, as the core of primary deodorization, utilizes the microporous structure and oxygen-containing functional groups of the modified activated carbon-molecular sieve composite material to rapidly adsorb odor gases, achieving an initial reduction in odor concentration and lightening the burden on subsequent deep treatment. The photocatalytic oxidation unit, as the core of intermediate oxidation, oxidizes and decomposes recalcitrant odors (such as VOCs) that are difficult for the adsorption units to completely adsorb into carbon dioxide and water. Furthermore, it regenerates some active sites on the adsorption material through photocatalysis, extending the material's lifespan. The biodegradation unit, as the core of deep treatment, uses composite microbial agents to biologically metabolize the low-concentration odors remaining after photocatalysis, converting pollutants into nutrients for the microorganisms themselves, achieving resource conversion, while ensuring that outlet emissions meet standards. This four-stage system, through its step-by-step treatment of "pretreatment-preliminary adsorption-oxidative decomposition-deep degradation," overcomes the limitations of single-method approaches.

[0037] By acquiring data at high frequency through multi-parameter sensors, the central control module dynamically adjusts its operation based on two-level threshold logic to achieve on-demand operation. Under low-concentration conditions, only the first two stages are activated to reduce fan speed and energy consumption; under medium-concentration conditions, the first three stages are activated to reduce photocatalytic power balance efficiency and energy consumption; under high-concentration conditions, the system operates at full load to ensure thorough treatment. Simultaneously, temperature and humidity control ensures the activity of the biological units, and power and space velocity matching ensures the synergistic effect of photocatalysis and adsorption, forming a multi-dimensional dynamic adaptation mechanism.

[0038] Test Example 1 Initial indoor concentrations: ammonia 0.8 ppm, hydrogen sulfide 0.05 ppm, formaldehyde 0.3 ppm, VOCs 0.6 ppm. Test results are shown in Table 1.

[0039] Experimental Group 1: The control method of Example 1 was used to deodorize the air in an indoor home setting.

[0040] Control group 1: The traditional activated carbon adsorption method was used to deodorize the air in the indoor home environment.

[0041] Control group 2: Air deodorization in indoor home environments was carried out using a single photocatalytic method.

[0042] Control group 1, traditional activated carbon adsorption method operation steps (indoor home): 1. Material and equipment preparation: (1) Adsorbent material: granular unmodified activated carbon with a particle size of 2-4 mm and a bulk density of 0.45-0.55 g / cm³ is selected. 3 Specific surface area 800-1000 m² 2 / g.

[0043] (2) Adsorption device: A cylindrical adsorber (diameter 35cm, height 20cm, adsorption layer thickness 6cm) is used.

[0044] (3) Auxiliary equipment: Centrifugal fan (indoor air volume 800m³ / h) 3 / h), gas sampler, and odor concentration detector.

[0045] 2. Specific operating steps: Step 1: Equipment installation and pretreatment.

[0046] Indoor setup: Place the adsorber in a well-ventilated location with the air inlet facing the odor source. Install pressure gauges at the adsorber's inlet and outlet. Dry the activated carbon in a 105℃ oven for 4 hours to remove moisture, then fill it into the adsorption device and compact it to prevent airflow short-circuiting.

[0047] Step 2: Set the running parameters.

[0048] Indoor scenario: Turn on the fan and adjust the airflow to 800m³ / h.3 / h, control airspeed 1200h -1 It adopts a fixed air volume operation mode with no dynamic adjustment mechanism.

[0049] Step 3: Monitoring and maintenance during operation.

[0050] Odor concentrations at the inlet and outlet are measured every 30 minutes through the sampling port, and the removal rate is calculated. When the removal rate drops to 50% of the initial value, the activated carbon is considered saturated, and operation is stopped. In indoor environments, the activated carbon is replaced every 48 hours. After disassembling the adsorption device, new carbon is replaced, and the equipment is restarted after the replacement cycle is completed.

[0051] Step 4: Stop the process.

[0052] Normal shutdown: First, turn off the fan, disassemble the adsorption device, and clean the saturated activated carbon; Emergency shutdown: When the concentration is detected to exceed the safety threshold, turn off the fan directly and wait for the concentration to decrease before proceeding with subsequent operations.

[0053] Control group 2, single photocatalytic method operation steps (indoor home): 1. Material and equipment preparation: (1) Photocatalytic material: Pure titanium dioxide catalyst is used, coated on the surface of a quartz support with a coating thickness of 25 μm and a specific surface area of ​​50-80 m². 2 / g.

[0054] (2) Photocatalytic device: a quartz reaction chamber with two 254nm ultraviolet lamps inside.

[0055] (3) Auxiliary equipment: centrifugal fan (same as traditional activated carbon adsorption method), pre-filter HEPA filter (H11 grade), temperature and humidity controller, gas detection equipment.

[0056] 2. Specific operating steps: Step 1: Equipment debugging and initialization.

[0057] Install the pre-filter at the air inlet of the reaction chamber, connect the reaction chamber to the fan, check the airtightness of the UV lamp, and start the lamp to preheat for 30 minutes after turning on the power.

[0058] Step 2: Set the running parameters.

[0059] Start the fan and adjust the airflow to 800m³ / h. 3 / h, the ultraviolet lamps operate at rated power, and the reaction residence time is 2.5s; the entire process adopts fixed power and fixed air volume operation, without graded control.

[0060] Step 3: Monitoring and maintenance during operation.

[0061] The concentration of odors at the inlet and outlet and the temperature and humidity inside the reactor are checked every 30 minutes. When the removal rate drops to 60% of the initial value, the operation is stopped. The pre-filter is replaced every 7 days. The reaction chamber is disassembled every 90 days, the dust on the surface of the catalyst is cleaned with deionized water, and the catalyst is reinstalled after being air-dried. The ultraviolet lamp is replaced every 180 days.

[0062] Step 4: Stop the process.

[0063] Normal shutdown: First turn off the UV lamp, keep the fan running for 10 minutes to remove residual gas from the reactor, then turn off the fan; Emergency shutdown: Directly cut off the power supply, shut down all equipment, and restart according to the initialization procedure after the fault is cleared.

[0064] Table 1 Test Results

[0065] Test Example 2 Unlike Test Example 1, the test scenario was deodorization of exhaust gas from a waste transfer station. Experimental Group 2: The control method of Example 1 was used to deodorize the exhaust gas from the waste transfer station. Control Group 3: Traditional activated carbon adsorption was used to deodorize the exhaust gas from the waste transfer station. Control Group 4: A single photocatalytic method was used to deodorize the exhaust gas from the waste transfer station. All other aspects were the same as in Test Example 1. The test results are shown in Table 2.

[0066] Table 2 Test Results

[0067] Therefore, the present invention adopts the above-mentioned multi-effect synergistic air deodorization control method, which addresses the problems of low efficiency, poor adaptability, high operating costs, and easy generation of secondary pollution in existing deodorization methods. By integrating a composite purification mechanism and a control system, it achieves precise and efficient treatment of odor gases of different concentrations and components, while reducing operating energy consumption and maintenance costs.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-effect synergistic air deodorization control method, characterized in that: The air deodorization system is implemented using an integrated air deodorization system. The integrated air deodorization system is set up with a pre-filtration unit, a composite adsorption unit, a photocatalytic oxidation unit, a biodegradation unit and a centrifugal fan in sequence from the air inlet to the air outlet. The pre-filtration unit, composite adsorption unit, photocatalytic oxidation unit and biodegradation unit are connected by flanges for easy disassembly and maintenance. The integrated air deodorization system also includes an intelligent sensing module and a central control module. The control method includes the following steps: Step 1: Collect the odor gas concentration, temperature, and humidity parameters of the air to be treated through the intelligent sensing module; Step 2: Transmit the collected parameters to the central control module, compare them with the preset threshold, and generate control commands; Step 3: The air to be treated is sequentially purified through a pre-filtration unit, a composite adsorption unit, a photocatalytic oxidation unit, and a biodegradation unit. Step 4: The central control module dynamically adjusts the operating parameters of the pre-filtration unit, composite adsorption unit, photocatalytic oxidation unit, and biodegradation unit based on real-time parameters. The purified air is discharged after passing the test.

2. The multi-effect synergistic air deodorization control method according to claim 1, characterized in that: The pre-filtration unit uses a high-efficiency particulate filter with a filtration accuracy of 0.3μm and an initial resistance of ≤50Pa.

3. The multi-effect synergistic air deodorization control method according to claim 1, characterized in that: The composite adsorption unit uses modified activated carbon-molecular sieve composite adsorption material, wherein the activated carbon is modified by a nitric acid-hydrogen peroxide mixed solution, and the mass ratio of activated carbon to molecular sieve is 3:

1.

4. The multi-effect synergistic air deodorization control method according to claim 1, characterized in that: The photocatalytic oxidation unit uses a quartz reaction chamber with the inner wall coated with a titanium dioxide-graphene composite photocatalyst. Multiple 254nm ultraviolet lamps and multiple 405nm visible light LEDs are evenly arranged inside the chamber.

5. The multi-effect synergistic air deodorization control method according to claim 4, characterized in that: The coating thickness of the titanium dioxide-graphene composite photocatalyst is 20-30 μm.

6. The multi-effect synergistic air deodorization control method according to claim 1, characterized in that: The biodegradation unit adopts a rectangular cavity, which is filled with porous ceramic particles loaded with composite microbial agents. Temperature sensors, humidity sensors, heating elements, and humidifiers are installed inside the cavity to achieve temperature and humidity control.

7. The multi-effect synergistic air deodorization control method according to claim 6, characterized in that: The compound microbial agent includes Pseudomonas, Bacillus, and Yeast, with a colony count ratio of Pseudomonas:Bacillus:Yeast of 2:1:

1.

8. The multi-effect synergistic air deodorization control method according to claim 1, characterized in that: The intelligent sensing module includes an ammonia sensor, a hydrogen sulfide sensor, a formaldehyde sensor, and a temperature and humidity sensor.

9. The multi-effect synergistic air deodorization control method according to claim 1, characterized in that: In step 1, the odorous gases include ammonia, hydrogen sulfide, formaldehyde, and volatile organic compounds.

10. The multi-effect synergistic air deodorization control method according to claim 1, characterized in that: In step 4, the control logic of the central control module is as follows: when the odor gas concentration is lower than the first threshold, only the pre-filtration unit and the composite adsorption unit are activated; when the odor gas concentration is between the first threshold and the second threshold, the pre-filtration unit, the composite adsorption unit, and the photocatalytic oxidation unit are activated; when the odor gas concentration is higher than the second threshold, all of the pre-filtration unit, the composite adsorption unit, the photocatalytic oxidation unit, and the biodegradation unit are activated.

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