Combined packing material and wastewater purification device

Abstract

This application relates to a combined packing material and a wastewater purification device. The combined packing material includes: a packing body coated with a luminescent material; and a symbiotic carrier disposed within the packing body, the symbiotic carrier having attachment bodies for algae and fungi to attach to, the attachment bodies being located on the side of the luminescent material. The attachment bodies of the symbiotic carrier enable algae and fungi to attach to it, thereby providing a stable attachment environment for algae and fungi. The light emitted by the luminescent material provides moderate illumination, allowing algae to perform photosynthesis without relying on an external light source. This reduces the operating costs of traditional lighting equipment and provides an attachment carrier for algae and fungi, making the algae-bacterial symbiotic system more stable.

Description

Technical Field

[0001] This application relates to the field of wastewater purification technology, and in particular to combined packing materials and wastewater purification devices. Background Technology

[0002] With the increasing emphasis placed on environmental protection by the country, wastewater needs to be purified before being discharged in order to remove pollutants and meet discharge standards.

[0003] Among related technologies, the microbial-algae symbiotic system utilizes the symbiotic relationship between microorganisms and algae, cleverly integrating the ecological functions of each. Through photosynthesis and biodegradation, it jointly removes pollutants from wastewater. The two complement each other and jointly form a self-regulating and self-sustaining ecosystem, which greatly improves the wastewater treatment effect.

[0004] However, the aforementioned algae-bacterial symbiotic systems typically rely on traditional lighting equipment for illumination, resulting in high operating costs. Furthermore, the lack of a carrier for algae and fungi to attach to makes these systems less stable. Utility Model Content

[0005] Based on this, this application provides a combined packing material and a wastewater purification device to solve the problem that the bacterial-algae symbiotic system cannot meet the usage requirements.

[0006] This application provides a combined packing material, comprising: a packing body coated with a luminescent material on its surface; and a symbiotic carrier disposed in the packing body, the symbiotic carrier having an attachment body for algae and fungi to attach to, the attachment body being located on the side of the luminescent material.

[0007] In one embodiment, the symbiotic carrier further includes a matrix connected to a filler body, an attachment disposed on the matrix, and a spacer between the attachment and the filler body.

[0008] In one embodiment, the substrate includes a connecting portion and an attachment portion connected together. The attachment portion surrounds the outer periphery of the connecting portion. The connecting portion is connected to the filler body. There are multiple attachments arranged on the outer periphery of the attachment portion. There are multiple hollow holes between the connecting portion and the attachment portion.

[0009] In one embodiment, the combined packing further includes a cleaning member disposed on the outer periphery of the packing body, the cleaning member being movable along the extension direction of the packing body to clean the packing body.

[0010] In one embodiment, the packing body includes a packing rod, and there are multiple symbiotic carriers, which are spaced apart along the axial direction of the packing rod. The cleaning component includes a cleaning rod and multiple cleaning rings. The axis of the cleaning rod is parallel to the extension direction of the axis of the packing rod. The cleaning rod is movable along the axial direction of the packing rod. The multiple cleaning rings are spaced apart along the axial direction of the cleaning rod. The packing rod passes through the multiple cleaning rings, and a symbiotic carrier is provided between each two adjacent cleaning rings.

[0011] In one embodiment, the attachment comprises a fiber bundle.

[0012] This application also provides a wastewater purification device, which includes: a reactor having a connected inlet and an outlet; and a combined packing material disposed inside the reactor, wherein the combined packing material is the combined packing material provided above.

[0013] In one embodiment, the wastewater purification device further includes a light-emitting element disposed in the reactor, and the light-emitting material is capable of absorbing the light emitted by the light-emitting element.

[0014] In one embodiment, the wastewater purification device further includes a light intensity detection element, which is disposed inside the reactor. The light intensity detection element can detect the light intensity inside the reactor, and the light-emitting element can adjust its output power according to the detection data of the light intensity detection element.

[0015] In one embodiment, the wastewater purification device further includes an oxygen detection element and an air supply pipe. The oxygen detection element is installed inside the reactor, and the air supply pipe is connected to the reactor. The air supply pipe can switch its working state according to the detection data of the oxygen detection element.

[0016] By applying the technical solution of this application, the symbiotic carrier allows algae and bacteria to attach to it, providing a stable attachment environment for them. This facilitates the stable absorption of inorganic nutrients from wastewater by algae and their photosynthesis. Bacteria stably biodegrade organic waste in the wastewater, removing impurities. Furthermore, because the surface of the packing material is coated with a luminescent material, which emits its own light, it provides adequate illumination, allowing algae to perform photosynthesis without relying on an external light source. Using the combined packing material of this application reduces the operating costs of traditional lighting equipment and provides an attachment carrier for algae and bacteria, making the algae-bacterial symbiotic system more stable. Attached Figure Description

[0017] Figure 1 A schematic diagram of the wastewater purification device provided in an embodiment of this application is shown.

[0018] Figure 2 A schematic diagram of the matrix structure of the combined filler provided in the embodiments of this application is shown.

[0019] Explanation of reference numerals in the attached figures:

[0020] 10. Packing material; 11. Packing rod; 20. Symbiotic carrier; 21. Attachment body; 22. Matrix; 221. Connecting part; 222. Attachment part; 223. Hole; 224. Connecting rib; 30. Cleaning component; 31. Cleaning rod; 32. Cleaning ring; 40. Reactor; 41. Inlet; 42. Outlet; 50. Light-emitting component; 60. Light intensity detection component; 70. Gas supply pipe; 80. Oxygen detection component. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0027] See Figure 1 , Figure 1 A schematic diagram of a combined packing material according to an embodiment of this application is shown. The combined packing material is located within a wastewater purification device. One embodiment of this application provides a combined packing material comprising a packing body 10 and a symbiotic carrier 20. The surface of the packing body 10 is coated with a luminescent material. The symbiotic carrier 20 is disposed on the packing body 10 and has attachment bodies 21 for algae and fungi to attach to. The attachment bodies 21 are located on the side of the luminescent material.

[0028] By applying the technical solution of this application, the attachment body 21 of the symbiotic carrier 20 enables algae and bacteria to attach to it, thereby providing a stable attachment environment for algae and bacteria. This facilitates the stable absorption of inorganic nutrients in wastewater by algae and their photosynthesis. The bacteria stably biodegrade organic waste in the wastewater, thereby removing impurities. Furthermore, because the surface of the filler body 10 is coated with a luminescent material, which is self-luminous, the emitted light provides adequate illumination, allowing algae to perform photosynthesis without relying on an external light source. Using the combined filler of this application reduces the operating costs of traditional lighting equipment and provides an attachment carrier for algae and bacteria, making the algae-bacterial symbiotic system more stable.

[0029] Among them, luminescent materials can achieve self-luminescence. Luminescent materials can be of different types, such as photoluminescent materials or radioluminescent materials. Photoluminescent materials refer to materials that emit light when excited by an external light source (such as ultraviolet light, visible light, or infrared light). After absorbing light energy, electrons in such materials transition from the ground state to an excited state, and then release photons when they return to the ground state through a non-radiative transition, thus emitting visible light.

[0030] By using a combination of fillers, the high dependence on a continuous external light source in related technologies is overcome, reducing fluctuations in purification efficiency caused by unstable lighting.

[0031] It should be noted that the luminescent material can be flexibly changed according to the specific growth habits of different algae in order to switch to the most suitable light source type.

[0032] In some embodiments, the luminescent material and UV adhesive are mixed at a mass ratio of 1:3, stirred with a stirring rod until liquid and free of bubbles, and then evenly coated onto the surface of the filler body 10 using a wool brush to ensure complete coverage and uniform thickness. To further cure the coating, a dedicated ultraviolet light source with a rated power of 9W is used for irradiation, causing the coating to solidify rapidly and bond tightly with the filler body 10, ultimately forming a composite filler with self-luminescent properties.

[0033] Generally, the attachment body 21 should have a loose structure, suitable for the attachment of algae and fungi.

[0034] In some embodiments, the prepared combined packing material is precisely deployed inside the reaction device, followed by directional inoculation with EM bacteria, photosynthetic bacteria, and a composite seawater green algae. During the initial cultivation stage, the ratio of chemical oxygen demand (COD), nitrogen (N), and phosphorus (P) is set at 100:5:1, and nutrients are carefully formulated to accelerate bacterial proliferation, enabling the bacteria to establish a biofilm matrix on the surface of the attachment body 21. As the bacterial community initially stabilizes, the nutrient formula is gradually adjusted to COD:N:P = 106:16:1, and trace elements are supplemented appropriately to create a suitable environment for algal reproduction, promoting the vigorous growth of algae on the established bacterial biofilm, thereby constructing a stable bacterial-algal composite biofilm structure. During the mature operation of the system, the nutrient salt addition ratio is fine-tuned to COD:N:P = 30:10:1 to ensure the dynamic balance and efficient operation of the bacterial-algal coexistence ecosystem.

[0035] The combined packing material provided in this application ingeniously integrates the self-luminescent function of luminescent materials with the function of microbial carriers, creatively constructing a novel combined packing material. This combined packing material not only provides a stable light source to meet the photosynthetic conditions required for algal growth, but also possesses excellent microbial attachment capabilities, effectively promoting the construction and stable operation of the algal-microbe symbiotic system. Furthermore, its self-luminescent properties reduce dependence on external light sources, avoiding the energy consumption and maintenance problems associated with conventional artificial lighting, and significantly reducing the operating costs of wastewater treatment.

[0036] Combination Figure 1 As shown, the symbiotic carrier 20 also includes a substrate 22, which is connected to the packing body 10. The attachment 21 is disposed on the substrate 22, so that there is a gap between the attachment 21 and the packing body 10. The substrate 22 can create a gap between the attachment 21 and the packing body 10, preventing algae from blocking the luminescent material on the surface of the packing body 10, so that the luminescent material can absorb sufficient light to achieve self-luminescence.

[0037] Among them, the luminescent material is a photoluminescent material.

[0038] Figure 2 A schematic diagram of the matrix structure of the combined packing provided in an embodiment of this application is shown. Combined with... Figure 2As shown, the substrate 22 includes a connecting portion 221 and an attachment portion 222 connected together. The attachment portion 222 surrounds the outer periphery of the connecting portion 221. The connecting portion 221 is connected to the filler body 10. There are multiple attachment bodies 21, which are arranged around the outer periphery of the attachment portion 222. There are multiple perforated holes 223 between the connecting portion 221 and the attachment portion 222. With the above structure, by providing perforated holes 223 between the connecting portion 221 and the attachment portion 222, water can flow within the perforated holes 223, making the water flow impact force similar at all points on the attachment body 21. This prevents the attachment bodies 21 from getting close to each other and entangled due to the water flow, thus not affecting the attachment environment of algae and fungi.

[0039] It should be noted that when the wastewater purification device is working, the reactor 40 is filled with wastewater, and the combined packing is placed inside the reactor 40. When the wastewater flows, if the substrate 22 is a solid structure, one side of the attachment 21 is flowing wastewater, and the other side is nearly still wastewater. Due to the impact of the water flow, the attachment 21 swings back and forth, and multiple attachments 21 may become entangled with each other. By setting perforated holes 223, water can flow through the perforated holes 223, thereby making the impact force of the water flow on both sides of the attachment 21 similar, which can prevent the attachments 21 from becoming entangled with each other.

[0040] Furthermore, by arranging multiple attachment bodies 21 on the outer periphery of the attachment portion 222, uniform utilization of the light emitted by the luminescent material is achieved in the circumferential direction of the attachment portion 222, thereby optimizing the environment for algal photosynthesis, accelerating the decomposition of organic matter and the removal of nitrogen and phosphorus, and improving the pollutant degradation rate and purification efficiency of the entire algal symbiotic system.

[0041] In some embodiments, the substrate 22 further includes a plurality of connecting ribs 224, the attachment portion 222 is a ring structure, the connecting portion 221 and the attachment body 21 are connected by a portion of the connecting ribs 224, and the plurality of connecting ribs 224 can intersect each other to form a hollow hole 223.

[0042] Combination Figure 1 As shown, the combined packing also includes a cleaning member 30, which is disposed on the outer periphery of the packing body 10. The cleaning member 30 can move along the extending direction of the packing body 10 to clean the packing body 10. By moving the cleaning member 30 along the extending direction of the packing body 10, substances and algae attached to the surface of the packing body 10 can be cleaned, thereby preventing impurities and algae from blocking the luminescent material, exposing the luminescent material so that it can absorb and emit light.

[0043] Combination Figure 1As shown, the packing body 10 includes a packing rod 11 and multiple symbiotic carriers 20, which are spaced apart along the axial direction of the packing rod 11. Using this structure, by providing multiple symbiotic carriers 20, more attachment sites 21 can be provided for algae and fungi, thus creating a more stable attachment environment for them.

[0044] The packing rod 11 can be made of polyethylene plastic.

[0045] In some embodiments, the cleaning component 30 includes a cleaning rod 31 and a plurality of cleaning rings 32. The axis of the cleaning rod 31 is parallel to the extending direction of the axis of the packing rod 11. The cleaning rod 31 is movable along the axial direction of the packing rod 11. The plurality of cleaning rings 32 are spaced apart along the axial direction of the cleaning rod 31. The packing rod 11 passes through the plurality of cleaning rings 32. A symbiotic carrier 20 is provided between each two adjacent cleaning rings 32. Using the above-described cleaning component 30, the cleaning rod 31 can drive the cleaning rings 32 to move. By moving the cleaning rings 32 along the axial direction of the packing rod 11, algae and impurities on the surface of the packing rod 11 can be cleaned, preventing impurities and algae from obscuring the luminescent material and exposing the luminescent material.

[0046] The cleaning ring 32 can be equipped with soft cleaning fibers to clean algae and impurities while avoiding damage to the luminescent material on the surface of the filler rod 11.

[0047] In some embodiments, the attachment body 21 comprises fiber bundles. The use of fiber bundles provides a loose attachment structure, which is beneficial for the attachment of algae and fungi.

[0048] It should be noted that, since the attachment body 21 adopts a flexible fiber bundle structure, the fiber bundles will extend downward under their own gravity, causing the fiber bundles to surround the outer periphery of the packing rod 11. During the growth of algae, algae may attach to the packing rod 11 and block the luminescent material. The cleaning ring 32 can clean the algae on the packing rod, allowing the luminescent material to be exposed.

[0049] Fiber bundles provide excellent microbial attachment capabilities, effectively promoting the construction and stable operation of the algal-microbe symbiotic system.

[0050] Another embodiment of this application provides a wastewater purification device, which includes a reactor 40 and a combined packing material. The reactor 40 has a connected inlet 41 and an outlet 42. The combined packing material is disposed inside the reactor 40 and is the combined packing material provided above. Using the above-described wastewater purification device, the attachment body 21 of the symbiotic carrier 20 allows algae and bacteria to attach to it, thereby providing a stable attachment environment for algae and bacteria. Furthermore, since the surface of the packing body 10 is coated with a luminescent material, the luminescent material is self-luminous, and the light emitted by the luminescent material can provide moderate illumination, allowing algae to perform photosynthesis without relying on an external light source. Using the combined packing material of this application reduces the operating cost of traditional lighting equipment and provides an attachment carrier for algae and bacteria, making the algae-bacteria symbiotic system more stable.

[0051] The reactor 40 is equipped with a suspension device, and the packing rod 11 of the combined packing is fixedly suspended on the suspension device.

[0052] In some embodiments, the inlet 41 is located at the bottom of the reactor 40, and the outlet 42 is located in the upper middle part of the reactor 40. Wastewater enters the reactor 40 through the inlet 41 and flows out through the outlet 42. Inside the reactor 40, bacteria are responsible for decomposing the organic matter in the wastewater, while algae provide oxygen and absorb nutrients through photosynthesis, thereby purifying the wastewater. Of course, the specific arrangement of the inlet 41 and the outlet 42 can be flexibly changed according to the actual scenario.

[0053] Combination Figure 1 As shown, the wastewater purification device also includes a light-emitting element 50, which is disposed in the reactor 40. The light-emitting material can absorb the light emitted by the light-emitting element 50. By setting the light-emitting element 50, a light source can be provided for the device, enabling algae to perform photosynthesis, and a light source can be provided for the light-emitting material, enabling the light-emitting material to absorb the light.

[0054] In some embodiments, the light-emitting element 50 is an LED light strip. The light-emitting element 50 can be arranged on the top of the reactor or in a circumferential surrounding light source layout.

[0055] Since the luminescent material can emit light on its own, there is no need to frequently adjust or replace external lighting facilities, which reduces the workload and complexity of system maintenance, and also reduces the safety hazards caused by equipment aging, ensuring the long-term stable operation of the wastewater purification device.

[0056] Combination Figure 1As shown, the wastewater purification device also includes a light intensity detection element 60, which is installed inside the reactor 40. The light intensity detection element 60 can detect the light intensity inside the reactor 40, and the light-emitting element 50 can adjust its output power based on the detection data from the light intensity detection element 60. By using the light intensity detection element 60 to detect the light intensity inside the reactor 40, it is possible to determine whether the light intensity meets the usage requirements. If the requirements are not met, the light intensity inside the reactor 40 can be adjusted by regulating the power of the light-emitting element 50, so that algae can carry out photosynthesis under suitable light conditions.

[0057] In order to achieve automatic adjustment of light intensity, a controller can be set up so that the controller is connected to the light-emitting element 50 and the light intensity detection element 60 respectively. The controller receives the detection signal from the light intensity detection element 60 and adjusts the light intensity of the light-emitting element 50.

[0058] Specifically, when the luminescent material emits light, the light intensity detection device 60 can also detect the light intensity inside the reactor 40. If it is determined that the light intensity emitted by the luminescent material is insufficient for algae to grow and perform photosynthesis, the luminescent device 50 can be activated to supplement the light intensity in conjunction with the luminescent material, allowing the algae to perform photosynthesis under suitable conditions.

[0059] Combination Figure 1 As shown, the wastewater purification device also includes an air supply pipe 70 and an oxygen detection element 80. The air supply pipe 70 is connected to the reactor 40, and the oxygen detection element 80 is installed inside the reactor 40. The air supply pipe 70 can switch its operating state based on the detection data from the oxygen detection element 80. The oxygen detection element 80 can detect the oxygen concentration in the wastewater and determine whether the oxygen concentration meets the usage requirements. If the requirements are not met, oxygen is supplemented by adjusting the operating state of the air supply pipe 70 to make the oxygen concentration in the wastewater suitable.

[0060] The gas supply pipe 70 can be located at the bottom of the reactor 40. Of course, various dissolved oxygen control methods can also be used, such as transverse perforation to deliver oxygen or chemical agents to provide oxygen.

[0061] The operating status of the gas supply pipe 70 refers to the following: when there is sufficient oxygen in the reactor 40, the gas supply pipe 70 is disconnected from the reactor 40; when there is a lack of oxygen in the reactor, the gas supply pipe 70 is opened to replenish oxygen.

[0062] In one specific embodiment, the oxygen concentration in the wastewater can be maintained within the ideal range of 7 mg / L ± 1.0 mg / L to ensure that the vigorous needs of life activities at all levels in the biofilm are met.

[0063] In this wastewater purification device, natural light and luminescent components can be used during the day to enable algae to perform photosynthesis. At night, luminescent materials can be used to emit light, allowing the algae to utilize their light energy.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A combined filler, characterized in that The combined packing includes: The filler body has a surface coated with a luminescent material; A symbiotic carrier is disposed in the filler body, the symbiotic carrier having an attachment body for algae and fungi to attach to, the attachment body being located on the side of the luminescent material.

2. The combination filler of claim 1, wherein, The symbiotic carrier further includes a matrix connected to the filler body, the attachment body being disposed on the matrix, and a gap being present between the attachment body and the filler body.

3. The combination charge of claim 2 wherein, The substrate includes a connecting part and an attachment part connected together, the attachment part surrounding the outer periphery of the connecting part; the connecting part is connected to the filler body, and there are multiple hollow holes between the connecting part and the attachment part; there are multiple attachment bodies, and the multiple attachment bodies are arranged on the outer periphery of the attachment part.

4. The combination charge of claim 1 wherein, The combined packing also includes a cleaning element disposed on the outer periphery of the packing body. The cleaning element is movable along the extension direction of the packing body to clean the packing body.

5. The combined packing material according to claim 4, characterized in that, The packing body includes a packing rod, and there are multiple symbiotic carriers, which are spaced apart along the axial direction of the packing rod. The cleaning component includes a cleaning rod and a plurality of cleaning rings. The axis of the cleaning rod is parallel to the extension direction of the axis of the packing rod, and the cleaning rod is movable along the axial direction of the packing rod. The plurality of cleaning rings are spaced apart along the axial direction of the cleaning rod. The packing rod passes through the plurality of cleaning rings. A symbiotic carrier is provided between each two adjacent cleaning rings.

6. The combination filler of any one of claims 1 to 5, wherein, The attachment comprises fiber bundles.

7. A wastewater purification apparatus characterized by comprising: The wastewater purification device includes: The reactor has a connected inlet and outlet. A combined packing material is disposed within the reactor, wherein the combined packing material is any one of claims 1 to 6.

8. The wastewater purification device of claim 7, wherein The wastewater purification device also includes a light-emitting element, which is disposed in the reactor; the light-emitting material is capable of absorbing the light emitted by the light-emitting element.

9. The wastewater purification device of claim 8, wherein The wastewater purification device also includes a light intensity detection element, which is installed inside the reactor and can detect the light intensity inside the reactor; the light-emitting element can adjust its output power according to the detection data of the light intensity detection element.

10. The wastewater purification device of claim 7, wherein The wastewater purification device also includes an oxygen detection element and an air supply pipe; the oxygen detection element is installed inside the reactor; the air supply pipe is connected to the reactor, and the air supply pipe can switch its working state according to the detection data of the oxygen detection element.

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