Efficient and stable organic waste gas purification device

Abstract

The utility model discloses an efficient and stable organic waste gas purification device which comprises a reactor main body, and the reactor main body is sequentially provided with a circulating nutrient solution supply area, an inlet and outlet area and a biodegradation area from bottom to top; a circulating liquid storage tank is arranged at the bottom of the circulating nutrient solution supply area, and a first feeding opening, a circulating nutrient solution discharging opening and a second feeding opening are formed in the upper part of the circulating liquid storage tank; a sludge outlet is formed in the bottom of the circulating liquid storage tank; a thermodetector, a second pressure monitoring port and an air inlet are arranged on the side wall of the inlet-outlet area; a perforated air distribution pipe is arranged at the upper part of the air inlet; the biodegradation area is sequentially provided with a filler layer and a sprayer from bottom to top, and a material changing opening is formed in the side wall of the filler layer; a gas outlet is formed in the top of the reactor main body, and a first pressure monitoring port is formed in the side wall between the demister and the first sprayer. According to the utility model, the pressure monitoring system is additionally arranged, so that real-time pressure monitoring and QQ enzyme feeding are realized, manual regular monitoring and tedious operation are reduced, and the system is timely and accurate and has strong anti-interference capability.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste gas purification, in particular to a highly efficient and stable organic waste gas purification device. Background Art

[0002] With the rapid economic development and the improvement of industrialization level in my country, the emission of volatile organic compounds (VOCs) has increased year by year, and the atmospheric environment has formed regional complex pollution with VOCs, fine particulate matter and ozone as the main pollutants. VOCs are characterized by strong persistence, bioaccumulation and toxicity, and are important precursors to the formation of photochemical smog and secondary organic aerosols. Therefore, it is urgent to solve the problem of VOCs pollution control.

[0003] Compared with physical and chemical methods, biological methods have the advantages of strong resistance to shock loads, high cost-effectiveness and no secondary pollution. They have attracted much attention in VOCs purification. They use the metabolism of microorganisms to decompose VOCs into substances such as H2O and CO2 to achieve pollutant mineralization. Biotrickling filters (BTFs) are widely used due to their small footprint, environmental friendliness and simple operation. However, due to their low mass transfer rate for VOCs, which affects bioavailability; long-term operation causes uneven distribution of microorganisms and excessive accumulation of organisms, traditional physical and chemical biomass control methods will cause operation interruptions and reduced removal performance, inhibit microbial activity and have a long system recovery cycle, which seriously limits the industrial application of BTF. Therefore, it is crucial to provide an organic waste gas purification device that takes into account high VOCs treatment efficiency and long-term stable operation. Utility Model Content

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a highly efficient and stable organic waste gas purification device.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0006] A highly efficient and stable organic waste gas purification device comprises a reactor body, which comprises a circulating nutrient solution supply area, an inlet and outlet area, a third biodegradation area, a second biodegradation area and a first biodegradation area from bottom to top; a circulating liquid storage tank is provided at the bottom of the circulating nutrient solution supply area, a first feeding port, a circulating nutrient solution discharge port and a second feeding port are provided at the upper part of the circulating liquid storage tank; a mud discharge port is provided at the bottom of the circulating liquid storage tank; a mud discharge valve is provided on the mud discharge port; a temperature meter, a second pressure monitoring port and an air inlet are provided on the side wall of the inlet and outlet area, a perforated air pipe is provided at the upper part of the air inlet; a third biodegradation area is provided; a circulating liquid storage tank is provided at the bottom of the circulating liquid storage tank; ... circulating nutrient solution discharge port and a second feeding port are provided at the upper part of the circulating liquid storage tank; a circulating nutrient solution discharge port and a second feeding port are provided at the lower part of the circulating liquid storage tank; a circulating nutrient solution discharge port and a second feeding port are provided at the upper part of the circulating liquid storage tank; a circulating nutrient solution discharge port and a second feeding port are provided at the lower part of the circulating liquid storage tank; a circulating nutrient solution discharge port and a second feeding port are provided at the upper part of the circulating liquid storage tank; a circulating nutrient solution discharge port and a second feeding port are provided at the lower part of the circulating liquid storage tank; The decomposition zone is provided with a third packing layer and a third sprayer in sequence from bottom to top, and a third material change port is provided on the side wall of the third packing layer; the second biodegradation zone is provided with a second packing layer and a second sprayer in sequence from bottom to top, and a second material change port is provided on the side wall of the second packing layer; the first biodegradation zone is provided with a first packing layer, a first sprayer and a demister in sequence from bottom to top, a first material change port is provided on the side wall of the first packing layer, an air outlet is provided on the top of the reactor body, and a first pressure monitoring port is provided on the side wall between the demister and the first sprayer; an air inlet valve and an air outlet valve are provided on the air inlet and the air outlet, respectively.

[0007] Preferably, the first pressure monitoring port and the second pressure monitoring port are connected to the pressure sensor through a pressure signal transmission line, and the pressure sensor is connected to the PLC controller through an electrical signal transmission line; the QQ enzyme storage tank is connected to the circulation liquid storage tank through a QQ enzyme delivery pipeline, and the QQ enzyme delivery pipeline is sequentially provided with a PLC controller, a fifth check valve, a second water pump and a fourth flow meter.

[0008] Preferably, the first sprayer is connected to the first water pump through the first nutrient solution delivery pipeline, and the first nutrient solution delivery pipeline is provided with a first flow meter and a first check valve; the second sprayer is connected to the first water pump through the second nutrient solution delivery pipeline, and the second nutrient solution delivery pipeline is provided with a second flow meter and a second check valve; the third sprayer is connected to the first water pump through the third nutrient solution delivery pipeline, and the third nutrient solution delivery pipeline is provided with a third flow meter and a third check valve; the circulating liquid storage tank is connected to the first water pump through a fourth check valve.

[0009] Preferably, the reactor body is made of organic glass, and the gas velocity of the reactor body is in the range of 0.5 m / s to 5 m / s.

[0010] Preferably, the first filler layer, the second filler layer and the third filler layer are all polyurethane sponge fillers loaded with a fungus-bacteria composite bacterial system.

[0011] The utility model domesticates and compound the fungi and bacteria screened from acid copper mine wastewater and coking activated sludge, and then inoculates them into the device, attaches to the surface of the filler to form a biofilm, and the organic waste gas enters the device and contacts with the nutrient solution in countercurrent, realizing the three-phase mass transfer of gas-liquid-biofilm, and completely mineralizing VOCs into CO2 and H2O through the synergistic metabolism of fungi and bacteria, thereby improving the pollution removal effect. At the same time, during the operation of the device, the pressure drop is monitored by the pressure sensor and the control system to reflect the blockage and operation status of the device. When the pressure is too high, the control system will automatically open the valve to spray a certain amount of QQ enzyme into the device, quench and inactivate AHLs through quorum induction, reduce information exchange between microorganisms, inhibit biomass accumulation, and reduce adhesion strength to promote its shedding, so as to achieve long-term stable operation of the device without affecting the pollution removal efficiency.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model provides an efficient and stable organic waste gas purification device. On the basis of the original biological trickling filter device, a pressure monitoring and control system is innovatively added, and the two are coupled in the same unit, realizing real-time monitoring of pressure and automatic addition of QQ enzyme, reducing manual regular monitoring and tedious operations, and having the advantages of timeliness, accuracy, compact structure, convenient operation, and strong anti-interference ability.

[0014] 2. The utility model is equipped with a flow meter, a check valve and a sprinkler in each biodegradation zone, which are independent of each other and are not affected. According to the actual operation situation, the flow rate of the nutrient solution of the sprinkler can be changed by adjusting the flow meter to improve the metabolic activity of the microorganisms and the nutrient supply in the unit, so as to ensure that an effective biofilm is formed in each unit. The best degradation effect is obtained by combining the three, which overcomes the disadvantages of uneven distribution of nutrient solution in the single-layer sprinkler, local blockage of the reactor and formation of anaerobic zone.

[0015] 3. The utility model combines fungus-bacteria synergistic degradation with quorum sensing quenching technology. The hydrophobic protein secreted by fungi in the fungus-bacteria composite system can enhance the mass transfer rate of hydrophobic VOCs, and the secreted non-specific oxidoreductase can accelerate the conversion of intermediate products, which is beneficial to the subsequent degradation of bacteria. At the same time, the interdependence of the two is conducive to improving the anti-interference ability and scope of application. The quorum sensing quenching technology can automatically add QQ enzymes to timely and accurately degrade the AHLs secreted by microorganisms when the pressure of the device is too high and blocked, slow down the formation of biofilm and reduce adhesion. It not only gives play to the advantages of fungus-bacteria synergistic degradation, but also reflects the advantages of QQ enzymes in inhibiting biomass accumulation. The significant effect solves the problems of low mass transfer rate of organic waste gas, poor long-term operation stability and blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the utility model structure.

[0018] In the figure: 1: reactor body; 2: demister; 3-1: first pressure monitoring port; 3-2: second pressure monitoring port; 4-1: first sprayer; 4-2: second sprayer; 4-3: third sprayer; 5-1: first packing layer; 5-2: second packing layer; 5-3: third packing layer; 6-1: first material change port; 6-2: second material change port; 6-3: third material change port; 7: air inlet; 8: air inlet valve; 9: air outlet; 10: air outlet valve; 11: perforated air pipe; 12: thermometer; 13-1: first feeding port; 13-2: second feeding port; 14: circulating nutrient solution outlet; 15: circulating liquid storage tank; 16: mud outlet; 17: mud outlet Valve; 18-1: first check valve; 18-2: second check valve; 18-3: third check valve; 18-4: fourth check valve; 18-5: fifth check valve; 19-1: first flow meter; 19-2: second flow meter; 19-3: third flow meter; 19-4: fourth flow meter; 20-1: first water pump; 20-2: second water pump; 21-1: first nutrient solution delivery pipeline; 21-2: second nutrient solution delivery pipeline; 21-3: third nutrient solution delivery pipeline; 22: pressure sensor; 23: QQ enzyme storage tank; 24: PLC controller; 25: pressure signal transmission line; 26: electrical signal transmission line; 27: QQ enzyme delivery pipeline. DETAILED DESCRIPTION

[0019] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1As shown, a highly efficient and stable organic waste gas purification device includes a reactor body 1. The material of the reactor body 1 is organic glass, and the gas velocity range of the reactor body 1 is 0.5m / s to 5m / s. The reactor body 1 is composed of a circulating nutrient solution supply area, an inlet and outlet area, a third biodegradation area, a second biodegradation area and a first biodegradation area from bottom to top; a circulating liquid storage tank 15 is provided at the bottom of the circulating nutrient solution supply area, and a first feeding port 13-1, a circulating nutrient solution discharge port 14 and a second feeding port 13-2 are provided at the upper part of the circulating liquid storage tank 15; a mud discharge port 16 is provided at the bottom of the circulating liquid storage tank 15; a mud discharge valve 17 is provided on the mud discharge port 16; a thermometer 12, a second pressure monitoring port 3-2 and an air inlet 7 are provided on the side wall of the inlet and outlet area, and a perforated air distribution pipe 11 is provided on the upper part of the air inlet 7; the perforated air distribution pipe 11 makes the VOCs gas evenly distributed, and the microorganisms grow evenly on the surface of the filler, which prevents local blockage and improves the biological treatment effect; the third The biodegradation zone is provided with a third packing layer 5-3 and a third sprayer 4-3 in sequence from bottom to top, and a third material change port 6-3 is provided on the side wall of the third packing layer 5-3; the second biodegradation zone is provided with a second packing layer 5-2 and a second sprayer 4-2 in sequence from bottom to top, and a second material change port 6-2 is provided on the side wall of the second packing layer 5-2; the first biodegradation zone is provided with a first packing layer 5-1, a first sprayer 4-1 and a demister 2 in sequence from bottom to top, and a first material change port 6-1 is provided on the side wall of the first packing layer 5-1, an air outlet 9 is provided on the top of the reactor body 1, and a first pressure monitoring port 3-1 is provided on the side wall between the demister 2 and the first sprayer 4-1; an air inlet valve 8 and an air outlet valve 10 are provided on the air inlet 7 and the air outlet 9, respectively.

[0021] The first pressure monitoring port 3-1 and the second pressure monitoring port 3-2 are connected to the pressure sensor 22 through the pressure signal transmission line 25, and the pressure sensor 22 is connected to the PLC controller 24 through the electrical signal transmission line 26; the QQ enzyme storage tank 23 is connected to the circulation storage tank 15 through the QQ enzyme delivery pipeline 27, and the PLC controller 24, the fifth check valve 18-5, the second water pump 20-2 and the fourth flow meter 19-4 are sequentially arranged on the QQ enzyme delivery pipeline 27. Acyl homoserine lactonase is added to the QQ enzyme storage tank 23, and the concentration range of the QQ enzyme prepared by deionized water is 10-100 mg / L, the water temperature is maintained at 26-30°C, and the pH is 7±0.2. The monitoring range of the pressure sensor 22 is 0-800Pa. When the pressure difference between the first pressure monitoring port 3-1 and the second pressure monitoring port 3-2 is greater than 300Pa, it indicates that there is biomass accumulation and blockage in the reactor body 1. The pressure sensor 22 transmits a signal to the PLC controller 24. The PLC controller 24 controls the switches of the second water pump 20-2, the fifth check valve 18-5, and the fourth flow meter 19-4 on the QQ enzyme delivery pipeline 27. The QQ enzyme enters the circulating liquid storage tank 15 through the QQ enzyme delivery pipeline 27 and mixes with the nutrient solution. It enters the first, second and third packing layers 5-1, 5-2 and 5-3 through the first, second and third circulating nutrient solution delivery pipelines 21-1, 21-2 and 21-3 and the first, second and third sprinklers 4-1, 4-2 and 4-3. The QQ enzyme reduces the protein and polysaccharide secretion of microorganisms in the biofilm, reduces relative hydrophobicity and Zeta potential, reduces biomass accumulation and reduces adhesion, and exerts a quorum sensing quenching effect to maintain long-term, efficient and stable operation. When the pressure difference drops below 100 Pa, the PLC controller 24 will shut down and stop the delivery of QQ enzyme.

[0022] The first sprayer 4-1 is connected to the first water pump 20-1 through the first nutrient solution delivery pipeline 21-1, and the first nutrient solution delivery pipeline 21-1 is provided with a first flowmeter 19-1 and a first check valve 18-1; the second sprayer 4-2 is connected to the first water pump 20-1 through the second nutrient solution delivery pipeline 21-2, and the second nutrient solution delivery pipeline 21-2 is provided with a second flowmeter 19-2 and a second check valve 18-2; the third sprayer 4-3 is connected to the first water pump 20-1 through the third nutrient solution delivery pipeline 21-3, and the third nutrient solution delivery pipeline 21-3 is provided with a third flowmeter 19-3 and a third check valve 18-3; the circulating liquid storage tank 15 is connected to the first water pump 20-1 through the fourth check valve 18-4. The nutrient solution spraying amount is set to 15mL / min. The formula of the nutrient solution is: NH4Cl0.545g / L, ZnCl20.23 mg / L, MnSO4·H2O 0.13mg / L, K2HPO40.11 g / L, MgSO40.067g / L, KH2PO40.04 g / L, CaCl20.036 g / L, CoCl2·6H2O 0.42mg / L, Na2MoO4·2H2O 0.15mg / L, AlCl3·6H2O 0.05mg / L, CuSO4·H2O 0.03mg / L, pH 6.0-7.0.

[0023] The first packing layer 5-1, the second packing layer 5-2 and the third packing layer 5-3 are all polyurethane sponge packings loaded with fungus-bacteria composite bacteria. The fungus-bacteria composite bacteria are domesticated microbial bacteria. The specific domestication process is: acid copper mine wastewater and coking activated sludge are used as bacterial sources, respectively, and the liquid phase "intermediate product-target pollutant" co-domestication mode is used for directional domestication, and the concentrations of intermediate products and target pollutants are gradually increased. The concentrations are cultured at 25°C and 120r / min for 7 days. The above operation is repeated many times to allow the microorganisms to gradually adapt to the organic waste gas pollution environment and degrade the intermediate products. The optimal ratio is obtained by the VOCs degradation rate of the composite bacteria under different ratios, and finally an efficient degradation bacteria system with Aspergillus, Proteus, Pseudomonas and Providencia as the dominant genera is obtained. The specifications of the packing are a pore size of 10-15PPI and a density of about 32kg / m 3 , porosity of 93.3%, size of 10×10×10mm. In each biodegradation zone, the flow rate of the nutrient solution in the sprinkler is changed by adjusting the flow meter to improve the metabolic activity and degradation effect of the microorganisms in the unit, so that each unit is not affected, ensuring that an effective biofilm is formed in each unit, overcoming the disadvantages of uneven distribution of nutrient solution, local blockage of the reactor and formation of anaerobic zone.

[0024] The working process of the utility model is as follows: the organic waste gas enters the reactor body 1 through the air inlet 7, and is evenly distributed through the perforated air distribution pipe 11. The organic waste gas is in countercurrent contact with the nutrient solution sprayed by the first sprayer 4-1, the second sprayer 4-2 and the third sprayer 4-3 in the reactor body 1. The nutrient solution is evenly sprinkled on the surface of the first packing layer 5-1, the second packing layer 5-2 and the third packing layer 5-3 to provide nutrients for the growth of microorganisms and form a biofilm. The organic waste gas is efficiently degraded by the fungus-bacteria composite bacteria system and finally mineralized into CO2 and H2O. The purified gas is discharged from the air outlet 9. During long-term operation, when the pressure sensor 22 detects that the pressure difference of the reactor body 1 exceeds 300Pa, the PLC controller 24 connected thereto will automatically turn on the switches of the second water pump 20-2, the fifth check valve 18-5, and the fourth flowmeter 19-4 on the QQ enzyme delivery pipeline 27, and the QQ enzyme enters the circulation storage tank 15 through the QQ enzyme delivery pipeline 27 to mix with the nutrient solution, play a quorum sensing quenching role, reduce biomass accumulation and adhesion, reduce pressure drop and blockage, and maintain long-term stable operation. By combining the fungus-bacteria composite bacterial system with the quorum sensing quenching technology, the problems of low organic waste gas mass transfer rate, poor degradation effect, poor long-term operation stability, and packing blockage are effectively solved. Without affecting the biological removal rate, the biomass accumulation process is effectively regulated, and the quorum sensing effect is weakened by degrading AHLs, reducing adhesion strength and slowing down biological blockage, preventing it from forming anaerobic zones under high load, and improving microbial metabolic activity.

[0025] The working principle of the utility model is to treat VOCs by combining the biodegradation of the fungus-bacteria composite system with the quorum sensing quenching. The organic waste gas is first adsorbed by the filler and then countercurrently contacts with the nutrient solution. The VOCs molecules conduct gas-liquid-solid three-phase mass transfer with the enriched fungus-bacteria composite system in the biofilm on the surface of the filler. The slender hyphae and large specific surface area of ​​the fungus can provide more growth sites for bacteria. At the same time, hydrophobic proteins and non-specific oxidoreductases are conducive to enhancing the gas-liquid mass transfer effect, accelerating the oxidation reaction and the degradation of intermediate products, oxidizing the macromolecular difficult-to-degrade VOCs into small molecular organic matter, reducing its biological toxicity, and then the bacteria further mineralize the small molecular organic matter into CO2 and H2O, completing the efficient purification of organic waste gas. At the same time, automatic monitoring and regulation are realized through pressure sensors and PLC controllers. The quorum sensing quenching degrades AHLs by adding QQ enzymes, slowing down biomass accumulation and blockage, reducing the adhesion strength of the biofilm, and maintaining the long-term efficient and stable operation of the device. Compared with other organic waste gas treatment devices, this device simultaneously achieves efficient degradation of organic waste gas and long-term stable operation. It reduces complicated manual operations through automatic monitoring and control means, is more timely, accurate and easy to operate, and has the advantages of small footprint, high VOCs removal efficiency, stable treatment effect, environmental friendliness and strong resistance to shock loads.

[0026] The utility model discloses an efficient and stable organic waste gas purification device which is suitable for removing various VOCs, especially toxic and harmful gases such as styrene, toluene, chloroform and other gases which have "three-hazard" effects on human body and malodorous gases such as hydrogen sulfide. It can also be used for purifying organic waste gas in the fields of protective coatings, printing and packaging, oil and natural gas processing, etc.

[0027] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An efficient and stable organic waste gas purification device, comprising a reactor body (1), characterized in that: The reactor body (1) comprises, from bottom to top, a circulating nutrient solution supply zone, an inlet and outlet zone, a third biodegradation zone, a second biodegradation zone and a first biodegradation zone; a circulating liquid storage tank (15) is provided at the bottom of the circulating nutrient solution supply zone, and a first feeding port (13-1), a circulating nutrient solution discharge port (14) and a second feeding port (13-2) are provided at the top of the circulating liquid storage tank (15); a mud discharge port (16) is provided at the bottom of the circulating liquid storage tank (15); a mud discharge valve (17) is provided on the mud discharge port (16); a temperature measuring instrument (12), a second pressure monitoring port (3-2) and an air inlet (7) are provided on the side wall of the inlet and outlet zone, and a perforated air distribution pipe (11) is provided at the top of the air inlet (7); a third filler layer (5-3) and a third sprayer (4-1) are provided in the third biodegradation zone from bottom to top. -3), a third material change port (6-3) is provided on the side wall of the third packing layer (5-3); a second packing layer (5-2) and a second sprayer (4-2) are provided in sequence from bottom to top in the second biodegradation zone, and a second material change port (6-2) is provided on the side wall of the second packing layer (5-2); a first packing layer (5-1), a first sprayer (4-1) and a demister (2) are provided in sequence from bottom to top in the first biodegradation zone, a first material change port (6-1) is provided on the side wall of the first packing layer (5-1), an air outlet (9) is provided on the top of the reactor body (1), and a first pressure monitoring port (3-1) is provided on the side wall between the demister (2) and the first sprayer (4-1); an air inlet valve (8) and an air outlet valve (10) are provided on the air inlet (7) and the air outlet (9), respectively.

2. The efficient and stable organic waste gas purification device according to claim 1 is characterized in that: The first pressure monitoring port (3-1) and the second pressure monitoring port (3-2) are connected to a pressure sensor (22) via a pressure signal transmission line (25), and the pressure sensor (22) is connected to a PLC controller (24) via an electrical signal transmission line (26); the QQ enzyme storage tank (23) is connected to a circulation liquid storage tank (15) via a QQ enzyme delivery pipeline (27), and the QQ enzyme delivery pipeline (27) is provided with a PLC controller (24), a fifth check valve (18-5), a second water pump (20-2) and a fourth flow meter (19-4) in sequence.

3. The efficient and stable organic waste gas purification device according to claim 1 is characterized in that: The first sprayer (4-1) is connected to the first water pump (20-1) via a first nutrient solution delivery pipeline (21-1), and the first nutrient solution delivery pipeline (21-1) is provided with a first flow meter (19-1) and a first check valve (18-1); the second sprayer (4-2) is connected to the first water pump (20-1) via a second nutrient solution delivery pipeline (21-2), and the second nutrient solution delivery pipeline (21-2) is provided with a second flow meter (19-2) and a second check valve (18-2); the third sprayer (4-3) is connected to the first water pump (20-1) via a third nutrient solution delivery pipeline (21-3), and the third nutrient solution delivery pipeline (21-3) is provided with a third flow meter (19-3) and a third check valve (18-3); and the circulating liquid storage tank (15) is connected to the first water pump (20-1) via a fourth check valve (18-4).

4. The efficient and stable organic waste gas purification device according to claim 1 is characterized in that: The material of the reactor body (1) is organic glass, and the gas velocity range of the reactor body (1) is 0.5m / s to 5m / s.

5. The efficient and stable organic waste gas purification device according to claim 1 is characterized in that: The first filler layer (5-1), the second filler layer (5-2) and the third filler layer (5-3) are all polyurethane sponge fillers loaded with a fungus-bacteria composite bacterial system.

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