A multi-layer foldable in-situ deodorizing system for removing malodorous gases

Abstract

The application discloses a multi-layer foldable in-situ deodorization system for removing malodorous gas, which comprises an airflow directional guiding unit, a multi-layer foldable synergic biochemical unit, a plant / probiotic composite liquid supplying unit and a switchable intelligent artificial integrated control unit; the airflow directional guiding unit is used for guiding the malodorous gas to the multi-layer foldable synergic biochemical unit; the multi-layer foldable synergic biochemical unit is used for removing the malodorous gas; the plant / probiotic composite liquid supplying unit provides nutrient solution and growth factors for microorganisms on the multi-layer foldable synergic biochemical unit; the switchable intelligent artificial integrated control unit is connected with the above three units, can automatically receive and analyze information transmitted by the above three units, and controls the operation of the units. The multi-layer foldable in-situ deodorization system has high processing efficiency, low operation cost and good system operation stability, and can realize in-situ treatment of the malodorous gas without transmission and collection.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology, specifically to a multi-layer foldable in-situ deodorization system for removing malodorous gases. Background Technology

[0002] In recent years, malodorous gases have become a major public concern. Malodorous gases refer to any gaseous substance that irritates the olfactory organs, causing unpleasant smells and damaging the living environment. Long-term inhalation or short-term inhalation of large amounts of malodorous gases can damage the respiratory, digestive, and nervous systems. If the malodorous gases contain chemicals such as benzene, toluene, or styrene, they may even cause cancer. Urban wastewater treatment plants produce large amounts of malodorous gases containing substances such as hydrogen sulfide, ammonia, methanethiol, ethanethiol, and methylamine. Livestock farms are filled with substances with unpleasant odors, such as ammonia, vinyl alcohol, dimethyl sulfide, hydrogen sulfide, methylamine, and trimethylamine, produced by the bacterial digestion and degradation of proteins and amino acids.

[0003] Currently, two main approaches are used to treat odorous gases in indoor spaces such as livestock farms and sludge dewatering workshops in urban wastewater treatment plants: The first approach involves collecting the internal odorous gases using a gas collection system and transporting them via pipelines to an external odor treatment unit for off-site treatment. However, external odor treatment units require a large area, resulting in high land and deodorization equipment investment costs. If placed on the ceiling or side walls of the indoor space, the load-bearing capacity of the walls is also high. Furthermore, collecting all indoor odorous gases externally involves long gas transport distances, high energy consumption, and high collection costs. Moreover, odor treatment units are relatively complex, difficult to disassemble in case of problems, and prone to instability under extreme weather conditions. The second approach uses a misting spray system to spray deodorizing agents into the indoor space for in-situ deodorization. This approach requires a large dosage of deodorizing agents, resulting in high raw material costs. Additionally, due to the complexity of odorous gas components, the deodorization effect of single or compound deodorizing agents often fails to meet expectations, leading to incomplete purification.

[0004] In summary, existing indoor odor gas treatment systems suffer from problems such as difficulty in collection, transmission, and in-situ treatment; low odor gas removal efficiency; incomplete purification of complex multi-component odor gases; and high costs and operating expenses. Summary of the Invention

[0005] Purpose of the invention: In order to solve the technical problems existing in the existing deodorization system, the present invention aims to provide a multi-layer foldable in-situ deodorization system with high processing efficiency, low cost and operating expenses, simple device structure and good system operation stability for the simultaneous removal of multiple complex malodorous gases.

[0006] Technical Solution: The multi-layer foldable in-situ deodorization system for simultaneously removing multiple complex malodorous gases, as described in this invention, includes an airflow directional guidance unit, a multi-layer foldable synergistic biochemical unit, a plant / probiotic compound liquid supply unit, and a switchable intelligent integrated control unit. The airflow directional guidance unit guides the flow direction of the malodorous gases, directing them towards the multi-layer foldable synergistic biochemical unit. The multi-layer foldable synergistic biochemical unit comprises three bioreaction modules. In the first bioreaction module, the bioactive matrix filler is iron oxide ceramic particles inoculated with Thiobacillus thioparus. In the second bioreaction module, the bioactive matrix filler is immobilized bacterial balls prepared by embedding with chitosan-sodium alginate as a carrier and Nitrosomonas as the target bacteria. In the third bioreaction module, the bioactive matrix filler is wood fiber polyurethane foam inoculated with Sacchariformis. The plant / probiotic compound liquid supply unit is used to provide nutrient solution and growth factors for the microorganisms inoculated in the multi-layer foldable synergistic biochemical unit, and to provide the energy required for the microorganisms to carry out their life activities. The switchable intelligent artificial integrated control unit is connected to the airflow directional guidance unit, the plant / probiotic compound liquid supply unit and the multi-layer foldable synergistic biochemical unit, and can automatically receive and analyze the information transmitted from the above three units, and control the operation of the above three units.

[0007] Furthermore, the airflow directional guiding unit includes a negative pressure fan, a ventilation window, a ventilation port, an air collection frame, and an air collection cloth. The negative pressure fan and the ventilation port are positioned opposite each other on both sides of the deodorization system. The ventilation port is located on one side of the deodorization system's mirror position, and the negative pressure fan is located on the side immediately adjacent to the deodorization system. The ventilation window is located on both sides of the ventilation port, the air collection frame is located around the ventilation port, and the air collection cloth is fixed to the air collection frame.

[0008] Furthermore, the multi-layer foldable synergistic biochemical unit includes a support component and a bioreaction module. The support component includes a steel cable, a miniature electric hoist, and a steel structure support. The miniature electric hoist is installed on the top of the steel structure support and connected to the bioreaction module via the steel cable, used to control the folding and unfolding of the unit bioactive matrix in the bioreaction module. The bioreaction module is composed of multiple layers of unit bioactive matrix, each unit bioactive matrix including a bioactive matrix frame, slide rails, and bioactive matrix blocks. The slide rails are installed on both sides of the bioactive matrix frame to connect adjacent layers of unit bioactive matrix in the module, thereby controlling the folding and unfolding of the unit bioactive matrix in the module. The bioactive matrix blocks are located within the bioactive matrix frame and include stainless steel mesh and filler, with the filler fixed between the stainless steel mesh.

[0009] Furthermore, the plant / probiotic compound liquid supply unit includes a liquid output terminal, a liquid filling tank, and water supply pipes a and b. The liquid output terminal and the liquid filling tank are connected through water supply pipe b, which is equipped with a solenoid valve b, a check valve, and a centrifugal pump. The liquid filling tank is connected to water supply pipe a, which is equipped with a solenoid valve a, a pipe heater, and a membrane filter in sequence. The inside side of the liquid filling tank is equipped with a high water level sensor, a low water level sensor, and a heating rod. The bottom is equipped with a stirrer and a drain outlet. The liquid output terminal is located between the three bioreactor modules within the multi-layer foldable synergistic biochemical unit.

[0010] Furthermore, the switchable intelligent integrated control unit includes a real-time monitoring and early warning unit, an information intelligent processing unit, and a remote intelligent control unit. The real-time monitoring and early warning unit is used to monitor the concentration of odorous gases in the room where the deodorization system is located in real time and feed back the concentration value of odorous gases to the information intelligent processing unit. The information intelligent processing unit is used to analyze and process the information from each unit. The remote intelligent control unit has a remote transmission mode and can monitor various indicators of the three units in real time.

[0011] Furthermore, the real-time monitoring and early warning unit includes a highly sensitive odor gas detector and an alarm bell.

[0012] Furthermore, the information intelligent processing unit is a control cabinet, which includes a main switch, a PLC, and a touch screen. Its functions include a manual / intelligent switching module, a multi-layer foldable collaborative biochemical module, a negative pressure fan operation module, a plant / benefit compound liquid supply unit control module, an odor gas monitoring module, a liquid tank control module, a solenoid valve control module, an alarm bell module, and a temperature / humidity monitoring module.

[0013] Furthermore, the iron oxide ceramic particles in the bioactive matrix of the first bioreactor module have a particle size of 5-8 mm, a porosity of 75-85%, and a bulk density of 400-500 kg / m³. 3 The immobilized bacterial pellets in the bioactive matrix of the second bioreactor module have a particle size of 6-8 mm, a porosity of 70-75%, and a bulk density of 500-600 kg / m³. 3 The third bioreactor module contains a bioactive matrix with lignocellulosic polyurethane foam particles of 8-10 mm in size, a porosity ≥90%, and a bulk density of 45-55 kg / m³. 3 .

[0014] Furthermore, the malodorous gases include those represented by hydrogen sulfide, ammonia, methylamine, and methanethiol. The multi-layer foldable in-situ deodorization system is applied to places where malodorous gases are generated, such as indoor spaces of farms, garbage treatment plants, or sewage treatment plants.

[0015] Invention Principle: Addressing the issues of existing off-site collection and centralized odor gas treatment devices requiring large site areas, resulting in high land and deodorization equipment investment costs, and placing them on the ceiling or side walls of indoor spaces placing high load-bearing requirements on the walls, this invention's in-situ deodorization system uses a steel structure support to support the bioactive matrix within the indoor space, eliminating load-bearing requirements on the walls. Furthermore, the steel structure support is located close to the side walls of the indoor space, minimizing the space occupied. Addressing the problems of existing technologies that collect all indoor odor gases externally, resulting in long gas transport distances, high energy consumption, and high collection costs, this invention is an in-situ deodorization system employing an airflow directional guidance unit. It does not collect gases but utilizes a negative pressure fan and the pushing action of outside air to guide the flow of indoor odor gases. The negative pressure fan has low power consumption, low energy consumption, and low operating costs. Addressing the problems of existing external odor gas treatment devices being relatively complex, difficult to disassemble in case of problems, and difficult to guarantee normal operation under extreme weather conditions, this system… The system features an open structure, facilitating disassembly and repair in case of problems. As an in-situ deodorization system located indoors, it better maintains the temperature necessary for microbial life activities, thus mitigating operational hazards and environmental factors during extreme weather conditions, ensuring normal operation. Addressing the issue of high raw material costs associated with existing in-situ deodorization methods that involve spraying deodorizing agents indoors, this invention pre-inoculates microorganisms onto a bioactive substrate. Subsequent operation only requires periodic spraying of nutrient solution and growth factors to the biofilm on the bioactive substrate, resulting in lower raw material costs. Furthermore, addressing the problem that existing technologies often fail to achieve the desired deodorization effect and thorough purification due to the complexity of odorous gas components, this invention employs three multi-layered, foldable bioreactor modules. The synergistic effect of different functional microorganisms on the bioactive substrate within these three modules leads to excellent treatment results and thorough purification.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0017] (1) This invention is an in-situ deodorization system, which is installed indoors. Under the action of negative pressure fans, vents and ventilation windows, the system guides the flow of malodorous gases in the room and guides them through the three biological reaction modules of the system to remove the malodorous gases in situ. Compared with traditional ex-situ treatment, there is no need to collect and transport malodorous gases, saving collection and transmission costs. In addition, the deodorization system of this invention is more flexible in application and can be applied to various types of indoor spaces. Compared with traditional ex-situ treatment, its application sites are more extensive. Compared with traditional ex-situ treatment, this system can handle a wider range of malodorous gas concentrations and has strong resistance to shock loads.

[0018] (2) The main body of the deodorization system of the present invention consists of three multi-layer foldable bioreactor modules. The bioactive matrix in each bioreactor module is set above the room by a steel structure support. When working, it is unfolded under the control of a mini electric hoist. The malodorous gas is treated by the bioactive matrix and then discharged outdoors by a negative pressure fan. When not working, it is folded at the top of the room, which occupies very little indoor space and does not affect the indoor air circulation, thus saving land investment costs. In addition, the system has an open structure, is easy to disassemble, and facilitates timely repair of system failures.

[0019] (3) The deodorization system of the present invention uses three multi-layer foldable bioreactor modules. The fillers of the bioactive matrix in the three bioreactor modules are iron oxide ceramic particles, immobilized bacterial balls prepared with chitosan-sodium alginate as carrier and Nitrosomonas as target bacteria, and wood fiber polyurethane foam, respectively. The bacteria inoculated on the three fillers are Thiobacillus thioparus, Nitrosomonas, and Sac fungi. The three bacteria have significant differences in the removal effect on malodorous gases of different components. Thiobacillus thioparus, Nitrosomonas, and Sac fungi have good removal effects on malodorous gases represented by hydrogen sulfide, ammonia, methylamine, and methanethiol, respectively. Under the synergistic effect of different bacteria on the bioactive matrix in the three bioreactor modules, the in-situ deodorization system of the present invention has high removal efficiency and excellent removal effect on malodorous gases. In addition, the fillers on the bioactive matrix have a long service life and the microbial film on the fillers is constantly renewed, which can be used for a long time and save costs.

[0020] (4) The in-situ deodorization system of the present invention is arranged indoors. Compared with the odor gas treatment device that collects and treats odors in an off-site location, this system is easier to maintain the temperature required for microorganisms to carry out normal life activities, is less affected by outdoor weather conditions, and the system operates stably.

[0021] (5) The present invention adopts an airflow directional guidance unit, the main body of which is a negative pressure fan, which is set on one side of the room. Under the action of the negative pressure fan, the ventilation windows on both sides of the room and the ventilation port on the mirror side of the negative pressure fan, the negative pressure fan can guide the flow direction of the malodorous gas in the room in a low power operation state, and guide it through the bioactive matrix in the bioreaction module and then discharge it to the outside through the negative pressure fan. The negative pressure fan operates at low power in this process, and the unit consumes little electricity and has relatively low operating costs.

[0022] (6) This system can switch between manual and intelligent working modes. In manual mode, the control cabinet can operate the buttons on the control cabinet screen according to the data displayed on the control cabinet screen to control the operation of each unit in the system. In intelligent working mode, the control cabinet will analyze the information transmitted from each unit and automatically control the operation of each unit to achieve intelligent automated control. The advantage of this system is that the control cabinet can automatically process the information transmitted from each unit and automatically complete the deodorization work of each unit without any human intervention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the working principle of the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0024] Figure 2 This is a schematic diagram of the folding of the unit bioactive matrix in the same bioreaction module of the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0025] Figure 3 This is a schematic diagram showing the unfolded bioactive matrix of a unit in the same bioreaction module of the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0026] Figure 4 This is a top view of the unit bioactive matrix in the same bioreaction module of the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0027] Figure 5 This is an unfolded side view of the unit bioactive matrix in the same bioreactor module of the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0028] Figure 6 This is a side view of the folded bioactive matrix of a unit in the same bioreaction module of the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0029] Figure 7 This is a schematic diagram showing the connection of unit bioactive matrix in the same bioreaction module of the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0030] Figure 8 This is a schematic diagram of the unit bioactive matrix structure in the multi-layer foldable in-situ deodorization system for removing malodorous gases of the present invention.

[0031] Figure 9 This is a front view of the bioactive matrix block in the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0032] Figure 10This is a side view of the bioactive matrix block in the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0033] Figure 11 This is a schematic diagram of the plant / probiotic compound liquid supply unit in the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0034] Figure 12 This is a data distribution diagram of the touch screen display of the control cabinet in the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0035] Figure 13 This is a diagram of the gas collection device for the vent in the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention.

[0036] In the diagram: 1. Steel cable; 2. Mini electric hoist; 3. Steel structure support; 4. Unit bioactive matrix; 5. Bioactive matrix frame; 6. Slide rail; 7. Bioactive matrix block; 8. Stainless steel mesh; 9. Filling area; 10. Negative pressure fan; 11. Ventilation window; 12. Ventilation port; 13. Liquid output terminal; 14. Water supply pipe a; 15. Liquid filling tank; 16. Water supply pipe b; 17. Gas collection cloth; 18. Gas collection frame. Detailed Implementation

[0037] The present invention will now be further described in conjunction with specific embodiments and accompanying drawings.

[0038] Example 1

[0039] like Figures 1-10 As shown, the multi-layer foldable in-situ deodorization system for removing malodorous gases described in this invention includes an airflow directional guidance unit, a multi-layer foldable synergistic biochemical unit, a plant / probiotic compound liquid supply unit, and a switchable intelligent integrated control unit, with the specific structure as follows:

[0040] The airflow directional guiding unit is used to guide the flow of malodorous gases indoors, so that the malodorous gases pass through the subsequent bioactive matrix for deodorization. This unit includes: a negative pressure fan 10, a ventilation window 11, a vent 12, a gas collection cloth 17, and a gas collection frame 18. The negative pressure fan 10 and the vent 12 are arranged opposite each other on both sides of the deodorization system. The vent 12 is located on one side of the deodorization system's mirror position, and the negative pressure fan 10 is located on the side immediately adjacent to the deodorization system. The ventilation window 11 is located on both sides of the vent 12, and the gas collection frame 18 is arranged around the vent 12. The gas collection cloth 17 is fixed to the gas collection frame 18.

[0041] The negative pressure fan 10 is a fiberglass negative pressure fan model 1260, with dimensions of 126cm × 126cm, an input power of 450W, and an air volume of 40,000 m³ / h. 3 / h, embedded in one wall of the interior, used to guide the flow of malodorous gases; the number of negative pressure fans 10 is determined according to the area of ​​the farm or sewage treatment plant, per 100m² 2 Install one of the aforementioned negative pressure fans 10;

[0042] The ventilation window 11 is a louvered type with a blade angle of 60-75 degrees, which can achieve good air intake effect.

[0043] The ventilation port 12 is equipped with louvers with the blade angle set to 80-90 degrees to achieve the best air intake effect.

[0044] The gas collection cloth 17 is made of PVC and is fixed on the gas collection frame 18. It is used to expand the air intake area of ​​the vent 12, thereby increasing the air intake volume. The indoor odorous gas is discharged after passing through the three biological reaction modules. The gas collection cloth 17 can be freely disassembled and installed according to the wind force and wind direction to achieve the best gas collection effect.

[0045] The gas collection frame 18 is made of stainless steel and is installed around the vent, mainly for fixing the gas collection cloth 17.

[0046] The multi-layer foldable synergistic biochemical unit is divided into three bioreaction modules. The number of layers of bioactive matrix in each bioreaction module is determined by the height of the indoor space. The filler area 9 on the bioactive matrix and the types of microorganisms inoculated on it are different in different bioreaction modules. The filler area 9 on the bioactive matrix in the same bioreaction module is inoculated with the same types of microorganisms. The multi-layer bioactive matrix in each bioreaction module completely covers the indoor cross-section when fully unfolded, ensuring that the indoor odorous gases must be treated by the bioactive matrix in the three bioreaction modules before they can be discharged outdoors by the negative pressure fan 10. It is used to remove odorous gases represented by hydrogen sulfide, ammonia, methylamine, and methanethiol, so that the treated odorous gases meet the emission standards. This unit includes a support component and a bioreaction module, wherein:

[0047] The support components include: steel cable 1, mini electric hoist 2, and steel structure bracket 3;

[0048] The miniature electric hoist 2, model PA1200, has a single hook load capacity of 600kg and is installed on the top of the steel structure support 3. It is connected to the bioreactor module via steel cable 1 and is used to control the folding and unfolding of the unit bioactive matrix 4 in the bioreactor module.

[0049] The steel structure support 3 is made of stainless steel and is used to support and fix the bioactive matrix, thereby providing a working platform for the bioactive matrix.

[0050] The bioreactor module is composed of multiple layers of unit bioactive matrix 4. Each unit bioactive matrix 4 includes a bioactive matrix frame 5, slide rails 6, and bioactive matrix blocks 7. The slide rails 6 are installed on both sides of the bioactive matrix frame 5 to connect the unit bioactive matrices 4 within the same bioreactor module, thereby controlling the folding and unfolding of the module's unit bioactive matrix 4. The bioactive matrix blocks 7 are located within the bioactive matrix frame 5 and include stainless steel mesh sheets 8 and filler areas 9. The filler areas 9 are located between the stainless steel mesh sheets 8, wherein:

[0051] The unit bioactive matrix 4 has a thickness of 5 cm. Microorganisms on it absorb and process malodorous gases passing through the matrix. It includes: bioactive matrix frame 5, slide rail 6, and bioactive matrix block 7.

[0052] The slide rails 6 are installed on both sides of the bioactive matrix frame 5 to connect the unit bioactive matrix 4 of the same bioreaction module, thereby controlling the folding and unfolding of the module unit bioactive matrix 4.

[0053] The bioactive matrix block 7 has a thickness of 5cm and includes: stainless steel mesh 8 and filler 9;

[0054] The stainless steel mesh 8, with a mesh size of 3mm×3mm, is used to fix the filler 9 and enhance the air permeability of the bioactive matrix, facilitating the passage of malodorous gases for their treatment.

[0055] The packing zone 9 in the different bioreactor modules is filled with different types of packing materials, and different types of microorganisms are inoculated on the different types of packing materials. The packing material of the bioactive matrix in the first bioreactor module is iron oxide ceramic granules with a particle size distribution between 5-8 mm, a porosity between 75%-85%, and a bulk density of 400-500 kg / m³. 3 The inoculated bacteria on it is *Thiobacillus thioparus*, which mainly absorbs and degrades hydrogen sulfide and some hydrophilic VOCs in the malodorous gases. Unabsorbed malodorous gases enter the second bioreactor module along the airflow direction. The bioactive matrix in the second bioreactor module is filled with immobilized bacterial balls prepared using chitosan-sodium alginate as a carrier and *Nitrosomonas* as the target bacteria. The particle size distribution is 6-8 mm, the porosity is between 70% and 75%, and the bulk density is 500-600 kg / m³. 3 The primary function of this system is to absorb and degrade ammonia and some hydrophilic VOCs in malodorous gases. Unabsorbed malodorous gases then enter the third bioreactor module. The bioactive matrix in this third bioreactor module is filled with wood-fiber polyurethane foam with a particle size of 8-10 mm, a porosity ≥90%, and a bulk density of 45-55 kg / m³. 3The bacteria inoculated on it is Sac fungi, which mainly absorbs and degrades hydrophobic VOCs such as methanethiol in odorous gases; after treatment, the concentration of odorous gases discharged outdoors by the negative pressure fan 10 meets the requirements stipulated in the "Odor Pollutant Emission Standard" (draft for comments).

[0056] In the first bioreactor module, the bioactive matrix is ​​filled with iron oxide ceramsite, inoculated with Thiobacillus thioparus to treat hydrogen sulfide and some hydrophilic VOCs in odorous gases. The iron oxide-modified ceramsite has Fe2+ deposited on its surface. 3+ Thiobacillus thioparus, being a Gram-negative bacterium, carries a positive charge on its surface. Therefore, due to the attraction of its charge, Thiobacillus thioparus easily attaches to the surface of iron oxide ceramic particles to form a biofilm, resulting in a relatively fast biofilm formation rate.

[0057] The second bioreactor module utilizes immobilized microbial technology for its bioactive matrix. Using chitosan-sodium alginate as a carrier and Nitrosomonas as the target bacteria, immobilized microbial spheres are prepared through an embedding process. These spheres primarily remove ammonia and some hydrophilic VOCs from malodorous gases. The amino groups in the chitosan structure can combine with the carboxyl groups in the sodium alginate molecular chain to form a polyelectrolyte membrane, thereby stabilizing the immobilized microbial spheres and extending their lifespan. The removal of ammonia by these immobilized microbial spheres relies not only on the absorption and degradation of ammonia by Nitrosomonas, but also on the adsorption of ammonia by chitosan, resulting in high removal efficiency.

[0058] In the third bioreactor module, the bioactive matrix uses wood fiber polyurethane foam as the filler, on which Sac fungi are inoculated, primarily to remove hydrophobic VOCs such as methanethiol. Modifying the polyurethane foam with wood fiber enhances its compressibility and resistance to damp heat aging, thereby extending the filler's lifespan and significantly improving its water retention. Wood fiber polyurethane is porous and has a strong water-holding capacity. After a period of operation, this in-situ deodorization system, although the Sac fungi surface is relatively dry, retains moisture in the pores of the filler to which they attach and grow, continuously providing the necessary nutrients for their growth, thus maintaining stability. This dry surface ensures sufficient contact between the exhaust gas and the fungi, while the water within the pores provides the Sac fungi with the necessary moisture and nutrients to maintain their activity.

[0059] All three types of bacteria thrive in neutral conditions and require similar nutrients for growth. Therefore, a single nutrient solution can be prepared to supply the growth needs of all three types of bacteria simultaneously, which is very convenient.

[0060] like Figure 11As shown, the plant / probiotic compound liquid supply unit is used to provide nutrient solution and growth factors for microorganisms inoculated on the bioactive substrate of each bioreaction module, to provide the energy required for the microorganisms to carry out life activities. It mainly includes: solenoid valve a, pipeline heater, membrane filter, solenoid valve b, liquid output terminal 13, water supply pipe a 14, liquid filling tank 15, centrifugal pump, and water supply pipe b 16. The liquid output terminal 13 and the liquid filling tank 15 are connected through the water supply pipe b 16, which is equipped with solenoid valve b, check valve, and centrifugal pump. The liquid filling tank 15 is connected to the water supply pipe a 14, which is equipped with solenoid valve a, pipeline heater, and membrane filter in sequence. The inside side of the liquid filling tank 15 is equipped with a high water level sensor, a low water level sensor, and a heater. The bottom is equipped with a stirrer and a drain outlet.

[0061] The solenoid valve a is located between the inlet of the water supply pipe a 14 and the pipe heater. The switching mode is controlled by the high and low water level sensors in the liquid tank 15. When the water level in the liquid tank 15 is lower than the low water level sensor, the solenoid valve a automatically closes and is manually opened after manual addition of chemicals. When the water level is higher than the high water level sensor, the solenoid valve a automatically closes.

[0062] The pipeline heater is a heating device installed on the water supply pipe a 14. It is turned on when the temperature is low in winter. Its function is to heat the water source and prevent the water from freezing in the pipeline due to the low temperature in the northern winter. The heating temperature is 10-40℃.

[0063] The membrane filter is a three-stage PPF filter element with 1µm pores, used to purify water.

[0064] The liquid addition tank 15 is made of corrosion-resistant material and is equipped with high and low water level sensors. When the water level is too low, it sends a signal to the control cabinet, which then sounds an alarm and automatically closes solenoid valves a and b. Nutrient solution is manually added to the tank 15 by manually opening solenoid valve a to allow water to enter. When the water level rises, triggering a high-level sensor to send a signal to the control cabinet, solenoid valve a automatically closes, stopping the water intake. The tank 15 has a drain outlet at the bottom for periodic drainage. A stirring device is also located at the bottom of the tank to ensure thorough mixing of the nutrient solution and water. A heating device is also installed at the bottom of the tank, automatically turning on when the water temperature is below 20°C and automatically turning off when the temperature is above 30°C.

[0065] The centrifugal pump is a vertical multistage centrifugal pump, and its flow rate is matched according to the number of liquid output terminals 13. Its function is to transport the nutrient solution in the liquid addition tank 15 to the liquid output terminals 13. The pressure range is 1-3 bar, and the flow rate is 2-3 m3 / h.

[0066] The solenoid valve b is located between the liquid tank 15 and the centrifugal pump and is controlled by the high and low water level sensors in the liquid tank 15. When the water level in the liquid tank 15 is lower than the low water level sensor, the solenoid valve b will automatically close. After manual addition of medicine, the solenoid valve a will be manually opened. When the water level reaches the high water level sensor, the solenoid valve a will automatically close and the solenoid valve b will automatically open.

[0067] The water supply pipes a 14 and b 16 are pipes that connect the membrane filter, the liquid tank 15, the centrifugal pump and the liquid output terminal 13. They are pressure-bearing and the material is PVC, PPR, PE or stainless steel.

[0068] The liquid output terminal 13 is arranged between different bioreactor modules. It is a PP material inverted hanging micro-spray nozzle with a flow rate of 15-20L / min and a spray diameter of 3m.

[0069] The switchable intelligent integrated control unit is connected to the airflow directional guidance unit, the multi-layer foldable collaborative biochemical unit, and the plant / probiotic compound liquid supply unit. It can automatically receive and analyze information from these three units and control them, including: a real-time monitoring and early warning unit, an intelligent information analysis and processing unit, and a remote intelligent control unit.

[0070] The real-time monitoring and early warning unit can monitor the concentration of odorous gases in the room in real time and feed back the concentration value of odorous gases to the touch screen of the control cabinet. It includes: a high-sensitivity odorous gas detector (hydrogen sulfide, ammonia, odor concentration) and an alarm bell.

[0071] The high-sensitivity odor gas detector is installed on an indoor wall or load-bearing column. It can simultaneously monitor and display three concentration parameters: hydrogen sulfide, ammonia and odor concentration. The data is then transmitted to the control cabinet via WiFi / 4G.

[0072] The alarm bell is installed in the control room. Its function is to sound an alarm when it receives a signal from the control cabinet that the concentration of malodorous gas exceeds the upper limit or the water level in the liquid tank 15 is too low, so as to attract people's attention.

[0073] The information intelligent analysis and processing unit is used to analyze and process information from various units, including: control cabinet;

[0074] The control cabinet includes a main switch, a PLC, and a touch screen, used to monitor, analyze, and process information from the airflow directional guidance unit, the multi-layer foldable synergistic biochemical unit, and the plant / probiotic compound liquid supply unit, as well as to control the operation of the above three units.

[0075] like Figure 12As shown, the PLC and touch screen are used to monitor and control the operation of various parts of the control system, including: a manual / intelligent switching module, a multi-layer foldable collaborative biochemical module, a negative pressure fan operation module, a plant / beneficial compound liquid supply unit control module, an odor gas monitoring module, a liquid tank control module, a solenoid valve control module, an alarm bell module, and a temperature / humidity monitoring module, wherein:

[0076] The manual / intelligent switching module is used to switch the operation mode of the control cabinet. In manual control mode, the operator uses the touchscreen to control the airflow directional guidance unit, the multi-layer foldable synergistic biochemical unit, and the plant / benefit compound liquid supply unit to remove odorous gases, based on the information displayed on the screen. In intelligent control mode, the control cabinet automatically analyzes and processes the information from these three units according to the selected intelligent control mode, further controlling their operation.

[0077] The multi-layer foldable synergistic biochemical module is used to control the operating status of the bioactive matrix in the three bioreactor modules, including the on and off buttons for the bioactive matrix and the position indicator lights of the mini electric hoist. Clicking the start button of the bioactive matrix in a certain bioreactor module starts the corresponding mini electric hoist to control the unfolding of the bioactive matrix in that module. When the bioactive matrix is ​​fully unfolded, the red position indicator light automatically turns on. Clicking the off button of the bioactive matrix in that module starts the corresponding mini electric hoist to control the folding of the bioactive matrix. When the bioactive matrix is ​​folded back to its initial position at the top of the room, the green position indicator light automatically turns on.

[0078] The negative pressure fan operation module is used to control the operation of the negative pressure fan 10. The module also displays the real-time status of air volume and air speed. By clicking the air speed or air volume module, the air speed and air volume can be controlled by adjusting the buttons in the module, thereby changing the operating speed and air volume of the negative pressure fan 10. In addition, by clicking the box to the right of the negative pressure fan in the module, other negative pressure fans 10 can be selected to control the operating status of different negative pressure fans 10 respectively.

[0079] The plant / probiotic compound liquid supply unit control module is used to control the operation of the plant / probiotic compound liquid supply unit. Users can set the start time and working time of the plant / probiotic compound liquid supply unit through touch screen operation.

[0080] The odor gas monitoring module displays data including ammonia concentration, hydrogen sulfide concentration, and odor concentration, as well as upper limits for the concentrations of these three odor gases. These upper limits are set by a user via touchscreen input according to local policies. This module is primarily used for real-time monitoring of the concentrations of these three odor gases. In intelligent control mode, it sets the opening and closing standards for the multi-layer foldable synergistic biochemical unit. When the indoor odor gas concentration exceeds the upper limit, the multi-layer foldable synergistic biochemical unit automatically starts to deodorize; when the indoor odor gas concentration is below the upper limit for 10 minutes, the multi-layer foldable synergistic biochemical unit automatically shuts off, ending the deodorization process.

[0081] The liquid filling tank control module includes high and low water level indicator lines for real-time monitoring of the water level in the liquid filling tank. When the water level in the liquid filling tank is lower than the low water level sensor or higher than the high water level sensor, the corresponding indicator line in the module and the liquid filling tank in the module will flash to indicate that the water level in the liquid filling tank is too high or too low.

[0082] The solenoid valve control module includes the opening status of two solenoid valves and an opening adjustment key. The user controls the opening degree of the solenoid valves by clicking the adjustment key. It is mainly used to control the on / off state of the solenoid valves.

[0083] The alarm bell module includes an alarm bell off button, which can be manually pressed to turn off the working alarm bell. It is mainly used to alert people that the concentration of malodorous gas in the room is too high or the water level in the liquid tank is too low.

[0084] The temperature / humidity monitoring module mainly includes the values ​​returned by electronic thermometers and hygrometers in various parts of the room, which are used to monitor the temperature and humidity in various locations in the room in real time.

[0085] The remote intelligent control unit allows users to view various monitoring results on the control cabinet display screen in real time via smartphones and tablets. It features remote transmission modes such as WiFi / 4G and enables operation of the control cabinet via smartphones and tablets, facilitating convenient and easy automated management.

[0086] The application method of the multi-layer foldable in-situ deodorization system for removing malodorous gases according to the present invention includes the following steps:

[0087] When this in-situ deodorization system adopts intelligent control, there are two intelligent control modes, and people can choose different intelligent control modes according to the actual situation. The upper limit of odor gas concentration is set according to the provisions in the "Odor Pollutant Emission Standard" (draft for comments).

[0088] Intelligent control mode 1:

[0089] S1: When the concentration of a certain odorous gas in the room reaches the set upper limit, the high-sensitivity odorous gas detector will transmit the signal to the control cabinet, and the control cabinet will transmit the signal to the alarm bell, which will then sound an alarm.

[0090] S2: When the signal is transmitted to the alarm bell, the control cabinet sends a start command to the bioactive matrix of the corresponding bioreaction module of the multi-layer foldable synergistic biochemical unit, and the alarm bell is automatically turned off.

[0091] S3: The miniature electric hoist in the bioreactor module starts up. Under the control of the miniature electric hoist, the unit bioactive matrix in the bioreactor module unfolds from top to bottom. After the unit bioactive matrix is ​​fully unfolded, the red position indicator light turns on and the signal is transmitted back to the control cabinet.

[0092] S4: The control cabinet sends a start command to the airflow directional guidance unit. The negative pressure fan in this unit starts at the set speed, creating a negative pressure state on the side of the indoor space closest to the fan. Internal gas flows towards the fan, while outside air enters through vents and windows. The odorous gases, propelled by the outside air and the combined action of the internal negative pressure fan, pass through the bioactive matrix of the corresponding module and are then exhausted outdoors by the negative pressure fan. During the passage of the odorous gases through the bioactive matrix, the fungi or bacteria growing on the multi-layered bioactive matrix absorb and biodegrade the corresponding components of the odorous gases. Odor molecules in the odorous gases penetrate the bioactive matrix, come into full contact with the biofilm formed on the matrix surface, and are absorbed, oxidized, and decomposed by microorganisms, ultimately converting into carbon dioxide, water, inorganic salts, minerals, etc., thereby achieving the purpose of removing the odorous gases.

[0093] S5: When the concentration of odorous gas is below the upper limit for 10 minutes, the high-sensitivity odorous gas detector transmits a signal to the control cabinet. The control cabinet sends a termination command to the airflow directional guidance unit. After the negative pressure fan is turned off, the control cabinet sends a termination command to the multi-layer foldable synergistic biochemical unit. Then, the bioactive matrix in the corresponding module is folded from bottom to top to restore the initial state under the control of the micro electric hoist. The green position indicator light turns on, and the deodorization process ends. The concentration of odorous gas discharged outdoors by the negative pressure fan after treatment meets the requirements of the "Odor Pollutant Emission Standard" (draft for comments).

[0094] S6: The start time of the plant / probiotic compound solution supply unit and the spraying time are set on the control cabinet. When the set time is reached, the bioactive substrate in each bioreactor module unfolds under the control of the mini electric hoist. After it is fully unfolded, the corresponding red position indicator light turns on. The plant / probiotic compound solution supply unit replenishes the microorganisms on the bioactive substrate of each module with nutrient solution and growth factors. After the spraying time ends, the unit stops working. Under the control of the mini electric hoist, the bioactive substrate in each bioreactor module begins to fold from bottom to top in sequence, returning to the initial state. The corresponding green position indicator light turns on.

[0095] Intelligent control mode 2:

[0096] S1: When the concentration of a certain odorous gas in the room reaches the set upper limit, the high-sensitivity odorous gas detector will transmit the signal to the control cabinet, and the control cabinet will transmit the signal to the alarm bell, which will then sound an alarm.

[0097] S2: When the signal is transmitted to the alarm bell, the control cabinet sends a start command to the multi-layer foldable collaborative biochemical unit, and the alarm bell is automatically turned off.

[0098] S3: All mini electric hoists start up, and the bioactive substrates of each bioreactor module unfold sequentially from top to bottom under the control of the mini electric hoists. After the bioactive substrates are fully unfolded, the red position indicator light turns on, and the signal is transmitted back to the control cabinet.

[0099] S4: The control cabinet sends a start command to the airflow directional guidance unit. The negative pressure fan in this unit starts at the set wind speed, creating a negative pressure state on the side of the indoor space closest to the fan. Internal gas flows towards the fan, while outside air enters through vents and windows. Driven by the outside air and the combined action of the internal negative pressure fan, the odorous gases pass sequentially through the bioactive substrates of each bioreactor module before being exhausted outdoors by the negative pressure fan. During this process, the odorous gases are absorbed and biodegraded by fungi and bacteria growing on the bioactive substrates in different bioreactor modules. Odor molecules in the gases penetrate the bioactive substrates, come into full contact with the biofilm formed on the substrate surface, and are absorbed, oxidized, and decomposed by microorganisms, ultimately converting into carbon dioxide, water, inorganic salts, minerals, etc., thereby achieving the purpose of removing the odorous gases.

[0100] S5: When the concentration of odorous gas is below the upper limit for 10 minutes, the high-sensitivity odorous gas detector transmits a signal to the control cabinet. The control cabinet sends a termination command to the airflow directional guidance unit. After the negative pressure fan is turned off, the control cabinet sends a termination command to the multi-layer foldable synergistic biochemical unit. Under the control of the micro electric hoist, the bioactive matrix of each bioreaction module is folded from bottom to top to restore its initial state. The green position indicator light turns on, and the deodorization process ends. The concentration of odorous gas discharged outdoors by the negative pressure fan after treatment meets the requirements of the "Odor Pollutant Emission Standard" (draft for comments).

[0101] S6: The start time of the plant / probiotic compound solution supply unit and the spraying time are set on the control cabinet. When the set time is reached, the bioactive substrate in each bioreactor module unfolds under the control of the mini electric hoist. After it is fully unfolded, the corresponding red position indicator light turns on. The plant / probiotic compound solution supply unit replenishes the microorganisms on the bioactive substrate of each module with nutrient solution and growth factors. After the spraying time ends, the unit stops working. Under the control of the mini electric hoist, the bioactive substrate in each bioreactor module begins to fold from bottom to top in sequence, returning to the initial state. The corresponding green position indicator light turns on.

[0102] When the control cabinet is in manual control mode, press the manual control switch button on the control cabinet:

[0103] S1: When the concentration of a certain odorous gas in the room reaches the set upper limit, the high-sensitivity odorous gas detector will transmit the signal to the control cabinet, and the control cabinet will transmit the signal to the alarm bell, which will then sound an alarm.

[0104] S2: When the signal is transmitted to the alarm bell, manually turn off the alarm bell; based on the concentration of the corresponding odor gas in the odor gas monitoring module, manually click the start button of the bioactive matrix in the corresponding bioreaction module on the multi-layer foldable synergistic biochemical module of the control cabinet;

[0105] S3: The mini electric hoist in the corresponding bio-reaction module starts to start. Under its control, the bioactive matrix of the module unfolds from top to bottom. After the bioactive matrix is ​​fully unfolded, the red position indicator light turns on.

[0106] S4: Manually press the start button for the airflow directional guidance unit on the control cabinet and adjust the fan speed. The negative pressure fan of this unit will start, creating a negative pressure state on the side of the indoor space closest to the negative pressure fan. Internal gas flows towards the negative pressure fan, while outside air enters the room through the vents and windows. The odorous gases, propelled by the outside air and the combined action of the internal negative pressure fan, pass through the corresponding module's bioactive matrix and are then exhausted outdoors by the negative pressure fan. During the passage of the odorous gases through the bioactive matrix, the fungi or bacteria growing on the matrix absorb and biodegrade the corresponding components. Odor molecules in the odorous gases pass through the bioactive matrix, fully contacting the biofilm formed on the matrix surface, where they are absorbed, oxidized, and decomposed by microorganisms, ultimately converting into carbon dioxide, water, inorganic salts, minerals, etc., thereby achieving the purpose of removing the odorous gases.

[0107] S5: When the concentration of odorous gas is below the upper limit for 10 minutes, the high-sensitivity odorous gas detector will transmit the signal to the control cabinet. Manually press the airflow directional guidance unit off button on the control cabinet, and then press the corresponding bioactive matrix off button in the bioreaction module on the multi-layer foldable synergistic biochemical module. After that, the bioactive matrix in the unit of the bioreaction module will fold from bottom to top to restore the initial state under the control of the micro electric hoist. The green position indicator light will turn on, and the deodorization process will end. The concentration of odorous gas discharged outdoors by the negative pressure fan after treatment meets the requirements of the "Odor Pollutant Emission Standard" (draft for comments).

[0108] S6: Manually press the start button for the bioactive matrix in each bioreaction module of the multi-layer foldable synergistic biochemical module. Under the control of the mini electric hoist, the bioactive matrix in each bioreaction module unfolds sequentially from top to bottom. When fully unfolded, the red position indicator light of each module turns on. Manually press the start button for the plant / probiotic compound liquid supply unit control module on the control cabinet to replenish the microorganisms on the bioactive matrix with nutrient solution and growth factors. After the spraying time ends, manually press the stop button for the plant / probiotic compound liquid supply unit control module. Manually press the stop button for the bioactive matrix in each bioreaction module of the multi-layer foldable synergistic biochemical module. Under the control of the mini electric hoist, the bioactive matrix in each module folds sequentially from bottom to top. When folded back to the starting position, the green position indicator light of each module turns on.

[0109] Example 2

[0110] Using the system and method of Example 1, taking a pig farm with a scale of 7200 pigs in a certain city as an example, the negative pressure fan 10, ventilation window 11, and ventilation port 12 in the airflow directional guidance unit guide the airflow of malodorous gases inside the pig farm, directing it to flow through the bioactive matrix on the three bioreaction modules. The malodorous gases first pass through the bioactive matrix of the first module, whose filler is iron oxide ceramic particles with a particle size distribution between 5-8 mm, a porosity between 75%-85%, and a bulk density of 400-500 kg / m³. 3 The bacteria inoculated on it is Thiobacillus thioparus, which mainly absorbs and degrades hydrogen sulfide and some hydrophilic VOCs in malodorous gases. The unabsorbed malodorous gases enter the bioactive matrix of the second module along the airflow direction. The filler is an immobilized bacterial ball prepared with chitosan-sodium alginate as the carrier and Nitrosomonas as the target bacteria. The particle size is distributed between 6-8 mm, the porosity is between 70% and 75%, and the bulk density is 500-600 kg / m³. 3 By relying on the absorption and degradation of ammonia and some hydrophilic VOCs by Nitrosomonas and the adsorption of ammonia by chitosan, the removal efficiency of ammonia and hydrophilic VOCs is greatly improved. Subsequently, a small amount of unabsorbed ammonia, hydrogen sulfide, and hydrophobic VOCs pass through the bioactive matrix in the third module. The filler for this matrix is ​​wood fiber polyurethane foam with a particle size of 8-10 mm, a porosity ≥90%, and a bulk density of 45-55 kg / m³. 3 The bacteria inoculated on it is Sac fungi, which absorbs the remaining small amount of ammonia, hydrogen sulfide and hydrophobic VOCs represented by methanethiol. After being treated by the bioactive matrix in the three bioreactor modules, the gas is discharged outdoors by the negative pressure fan 10. The exhaust gas is purified and meets the requirements of the "Odor Pollutant Emission Standard" (draft for comments). The test results are shown in Table 1.

[0111] Example 3

[0112] Using the system and method of Example 1, taking a pig farm with a scale of 7800 pigs in a certain city as an example, the negative pressure fan 10, ventilation window 11, and ventilation port 12 in the airflow directional guidance unit guide the airflow direction of the malodorous gas inside the pig farm, directing it to flow through the bioactive matrix on the three bioreaction modules. The malodorous gas first passes through the bioactive matrix of the first module, whose filler is iron oxide ceramsite with a particle size distribution between 5-8 mm, a porosity between 75%-85%, and a bulk density of 400-500 kg / m³. 3The bacteria inoculated on it is Thiobacillus thioparus, which mainly absorbs and degrades hydrogen sulfide and some hydrophilic VOCs in malodorous gases. The unabsorbed malodorous gases enter the bioactive matrix of the second module along the airflow direction. Its filler is wood fiber polyurethane foam with a particle size of 8-10 mm, a porosity of ≥90%, and a bulk density of 45-55 kg / m³. 3 The bacteria inoculated on top are Sac fungi, which mainly absorb hydrophobic VOCs, such as methanethiol. The remaining unabsorbed odorous gases then flow along the airflow direction into the bioactive matrix of the third module. The filler material consists of immobilized bacterial balls prepared using chitosan-sodium alginate as a carrier and Nitrosomonas as the target bacteria. The particle size distribution is 6-8 mm, the porosity is between 70% and 75%, and the bulk density is 500-600 kg / m³. 3 By relying on the absorption and degradation of ammonia and some hydrophilic VOCs by Nitrosomonas and the adsorption of ammonia by chitosan, the removal efficiency of ammonia and hydrophilic VOCs is greatly improved. After being treated by the bioactive matrix in the three bioreactor modules, the gas is discharged outdoors by the negative pressure fan 10. The exhaust gas is purified and meets the requirements of the "Odor Pollutant Emission Standard" (draft for comments). The test results are shown in Table 1.

[0113] Example 4

[0114] Using the system and method of Example 1, taking a pig farm with a scale of 6,000 pigs in a certain city as an example, the negative pressure fan 10, ventilation window 11, and ventilation port 12 in the airflow directional guidance unit guide the airflow direction of malodorous gases inside the pig farm, directing them to flow through the bioactive matrix on the three bioreaction modules. The malodorous gases first pass through the bioactive matrix of the first module, whose filler is wood fiber polyurethane foam with a particle size between 8-10 mm, a porosity ≥90%, and a bulk density of 45-55 kg / m³. 3 The bacteria inoculated on top are Sac fungi, which mainly remove some ammonia, hydrogen sulfide, and hydrophobic VOCs. Unabsorbed odorous gases enter the bioactive matrix of the second module along the airflow direction. The filler material is iron oxide ceramic granules with a particle size distribution between 5-8 mm, a porosity between 75%-85%, and a bulk density of 400-500 kg / m³. 3The bacteria inoculated on it is Thiobacillus thioparus, which mainly absorbs and degrades hydrogen sulfide and some hydrophilic VOCs in malodorous gases. The unabsorbed malodorous gases, mainly ammonia and some hydrophilic VOCs, then flow along the airflow direction into the bioactive matrix of the third module. The filler material is immobilized bacterial balls prepared using chitosan-sodium alginate as a carrier and Nitrosomonas as the target bacteria. The particle size distribution is 6-8 mm, the porosity is between 70% and 75%, and the bulk density is 500-600 kg / m³. 3 By relying on the absorption and degradation of ammonia and some hydrophilic VOCs by Nitrosomonas and the adsorption of ammonia by chitosan, the removal efficiency of ammonia and hydrophilic VOCs is greatly improved. After being treated by the bioactive matrix in the three bioreactor modules, the gas is discharged outdoors by the negative pressure fan 10. The exhaust gas is purified and meets the requirements of the "Odor Pollutant Emission Standard" (draft for comments). The test results are shown in Table 1.

[0115] Comparative Example 1 uses an existing biological filtration purification process.

[0116] Using an existing biological filtration purification process, odorous gases enter from the bottom of the filter bed. Within the biofilter, the gas flows upwards against the direction of nutrient solution infiltration. The gas passes through three layers of packing material: iron oxide ceramic particles, immobilized bacterial balls prepared using chitosan-sodium alginate as a carrier and Nitrosomonas as the target bacteria, and wood fiber polyurethane foam. The gas comes into contact with the biofilm attached to the surface of the biofilter packing material, thus achieving purification. The purified gas exits from the top of the biofilter. A nutrient solution spraying device is installed at the top of the biofilter. Nutrient solution is periodically sprayed through an inlet device to adjust the moisture content of the packing material and provide essential nutrients for microbial growth and metabolism. The gas and liquid are in full contact on the packing material. The hydrophilic components of the odorous gas first dissolve in the liquid phase, then come into contact with and are degraded by the microorganisms in the filter packing material. The purified gas exits from the exhaust port. The hydrophobic components are absorbed and degraded by Sac fungi inoculated on the wood fiber polyurethane foam. The above purification process was used to purify the high-concentration, complex-component odorous gases generated in the pig farms in Examples 2-4. The results are shown in Table 1.

[0117] Table 1 shows that the biofilter had limited removal efficiency for ammonia, hydrogen sulfide, and odor concentrations from the three pig farms, with removal rates only between 30% and 45%. This is likely due to the high odor load collected from the pig farms, exceeding the deodorization capacity of the microorganisms in the biofilter, resulting in poor deodorization. Compared to the biofilter, the multi-layer foldable in-situ deodorization system of this invention exhibits better deodorization performance for odorous gases. With the synergistic effect of different types of deodorizing microorganisms, the removal rate reaches over 85%. All odorous gas indicators discharged after treatment by this in-situ deodorization system meet the emission requirements for odorous gases stipulated in the "Odor Pollutant Emission Standard" (draft for comments). Therefore, the in-situ deodorization system of this invention possesses excellent deodorization capabilities for odorous gases.

[0118] Table 1. Results of odor gas purification treatment in Examples 2-4 and Comparative Example 1.

[0119]

Claims

1. A multi-layered, foldable, in-situ deodorization system for removing malodorous gases, characterized in that, It includes an airflow directional guidance unit, a multi-layer foldable synergistic biochemical unit, a plant / probiotic compound liquid supply unit, and a switchable intelligent artificial integrated control unit; The airflow directional guiding unit is used to guide the flow direction of the malodorous gas, directing it toward the multi-layer foldable synergistic biochemical unit. The multi-layer foldable synergistic biochemical unit includes three bioreaction modules. The first bioreaction module has an iron oxide ceramic particle filler in its bioactive matrix, inoculated with Thiobacillus thiogenes. The second bioreaction module has an immobilized bacterial ball prepared by embedding with chitosan-sodium alginate as a carrier and Nitrosomonas as the target bacteria. The third bioreaction module has a lignocellulosic polyurethane foam filler in its bioactive matrix, inoculated with Ascomycota. The plant / probiotic compound liquid supply unit is used to provide nutrient solution and growth factors to the microorganisms inoculated in the multi-layer foldable synergistic biochemical unit, and to provide the energy and substances required for the microorganisms to carry out metabolic activities. The switchable intelligent artificial integrated control unit is connected to the airflow directional guidance unit, the multi-layer foldable collaborative biochemical unit, and the plant / probiotic compound liquid supply unit. It can automatically receive and analyze the information transmitted from the above three units and control the operation of the control unit. The airflow directional guiding unit includes a negative pressure fan (10), a ventilation window (11), a ventilation port (12), a gas collection cloth (17), and a gas collection frame (18). The negative pressure fan (10) and the ventilation port (12) are arranged opposite each other on both sides of the deodorization system. The ventilation window (11) is located on both sides of the ventilation port (12). The gas collection frame (18) is located around the ventilation port (12), and the gas collection cloth (17) is fixed on the gas collection frame (18). The multi-layer foldable collaborative biochemical unit includes a support component and a bioreactor module. The support component includes a steel cable (1), a mini electric hoist (2), and a steel structure support (3). The mini electric hoist (2) is installed on the top of the steel structure support (3) and is connected to the bioreactor module through the steel cable (1) to control the bioreactor module. Folding and unfolding of unit bioactive matrix (4) in bioreaction module; There are three bioreaction modules, each module is composed of multiple layers of unit bioactive matrix (4), the unit bioactive matrix (4) includes bioactive matrix frame (5), slide rail (6) and bioactive matrix block (7), the slide rail (6) is installed on both sides of bioactive matrix frame (5) to connect unit bioactive matrix (4) of adjacent layers of the same module, so as to control the folding and unfolding of unit bioactive matrix (4) of adjacent layers of the same module; the bioactive matrix block (7) is located in bioactive matrix frame (5) and includes stainless steel mesh (8) and filler area (9), the filler area (9) is located between stainless steel mesh (8) and is filled with filler.

2. The multi-layer foldable in-situ deodorization system according to claim 1, characterized in that, The plant / probiotic compound liquid supply unit includes a liquid output terminal (13), a water supply pipe a (14), a liquid filling tank (15), and a water supply pipe b (16). The liquid output terminal (13) and the liquid filling tank (15) are connected through the water supply pipe b (16). The pipe is equipped with a solenoid valve b, a check valve, and a centrifugal pump. The liquid filling tank (15) is connected to the water supply pipe a (14). The water supply pipe a (14) is equipped with a solenoid valve a, a pipe heater, and a membrane filter in sequence. The inside side of the liquid filling tank (15) is equipped with a high water level sensor, a low water level sensor, and a heating rod. The bottom is equipped with a stirrer and a drain outlet. The liquid output terminal (13) is located between the three bioreaction modules in the multi-layer foldable synergistic biochemical unit.

3. The multi-layer foldable in-situ deodorization system according to claim 1, characterized in that, The switchable intelligent integrated control unit includes a real-time monitoring and early warning unit, an information intelligent processing unit, and a remote intelligent control unit. The real-time monitoring and early warning unit is used to monitor the concentration of odorous gases in the room where the deodorization system is located in real time and feed back the odorous gas concentration value to the information intelligent processing unit. The information intelligent processing unit is used to analyze and process the information from each unit. The remote intelligent control unit has a remote transmission mode and can monitor various indicators transmitted from the airflow directional guidance unit, the multi-layer foldable collaborative biochemical unit, and the plant / benefit compound liquid supply unit in real time.

4. The multi-layer foldable in-situ deodorization system according to claim 3, characterized in that, The real-time monitoring and early warning unit includes a high-sensitivity odor detector and an alarm bell.

5. The multi-layer foldable in-situ deodorization system according to claim 3, characterized in that, The information intelligent processing unit is a control cabinet, which includes a main switch, a PLC and a touch screen. Its functions include a manual / intelligent switching module, a multi-layer foldable collaborative biochemical module, a negative pressure fan operation module, a plant / benefit compound liquid supply unit control module, an odor gas monitoring module, a liquid tank control module, a solenoid valve control module, an alarm bell module and a temperature / humidity monitoring module.

6. The multi-layer foldable in-situ deodorization system according to claim 1, characterized in that, The iron oxide ceramic particles of the bioactive matrix in the first bioreactor module have a particle size of 5-8 mm, a porosity of 75-85%, and a bulk density of 400-500 kg / m³. 3 The immobilized bacterial pellets in the second bioreactor module have a particle size of 6-8 mm, a porosity of 70-75%, and a bulk density of 500-600 kg / m³. 3 The third bioreactor module contains a wood-based polyurethane foam matrix with a particle size of 8-10 mm, a porosity ≥90%, and a bulk density of 45-55 kg / m³. 3 .

7. The multi-layer foldable in-situ deodorization system according to claim 1, characterized in that, The malodorous gases include gases represented by hydrogen sulfide, ammonia, methylamine, and methanethiol. The multi-layer foldable in-situ deodorization system is applied to places that generate malodorous gases, such as indoor spaces of farms, garbage treatment plants, or sewage treatment plants.

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