A device and method for treating benzene series pollutants by photocatalytic coupling biodegradation

Abstract

The application discloses a kind of benzene series pollutant processing equipment and method of photocatalytic coupling biodegradation, equipment includes main body support mechanism and is arranged in coupling degradation mechanism in main body support mechanism;Main body support mechanism includes main body support outer cylinder shell, main body support inner cylinder shell is equipped in main body support outer cylinder shell, annular processing chamber is formed between main body support inner cylinder shell outer side wall and main body support outer cylinder shell inner side wall;Annular processing chamber is equipped with spiral partition plate;Coupling degradation mechanism includes the photocatalytic support plate and biological degradation attachment plate of being arranged on spiral partition plate;The equipment adopts the spiral channel structure of photocatalytic and biological degradation integration, benzene series sewage in pollution treatment spiral channel flows from bottom to top in the process, in turn with multiple photocatalytic support plate and biological degradation attachment plate Full contact, realize the continuous collaborative processing of " photocatalytic pre-oxidation-biological advanced degradation ".

Description

Technical Field

[0001] This invention relates to the field of benzene-based wastewater treatment technology, specifically to a photocatalytically coupled biodegradation device and method for treating benzene-based pollutants. Background Technology

[0002] In the field of benzene-based wastewater treatment, benzene-based pollutants (benzene, toluene, ethylbenzene, xylene, etc.) are a typical class of recalcitrant volatile organic pollutants, widely originating from industrial wastewater in industries such as petrochemicals, coking, pharmaceuticals, printing and dyeing, and coatings. These pollutants are highly toxic, carcinogenic, teratogenic, and mutagenic, and are chemically stable with extremely poor biodegradability. If discharged directly without effective treatment, they will cause serious harm to aquatic ecosystems and human health.

[0003] Currently, the main methods for treating benzene-related wastewater fall into three categories: physical, chemical, and biological methods. Single physical methods (such as adsorption, extraction, and membrane separation) can only achieve phase transfer of pollutants, not complete degradation, and suffer from problems such as difficulty in adsorbent regeneration and severe membrane fouling. Single chemical methods (such as Fenton oxidation and ozone oxidation) can rapidly oxidize some benzene compounds, but they have drawbacks such as high reagent consumption, high operating costs, and the easy generation of toxic intermediate products. Single biological methods are low-cost and environmentally friendly, but their treatment efficiency for high concentrations and recalcitrant benzene compounds is extremely low; microorganisms are easily inactivated by pollutant poisoning, and they require long hydraulic retention times and large land areas.

[0004] Photocatalysis coupled with biodegradation technology combines the strong oxidizing power of photocatalysis with the economic efficiency of biodegradation, making it a current research hotspot in the treatment of recalcitrant organic wastewater. However, existing photocatalysis-biodegradation coupled treatment equipment still has shortcomings such as the relative independence of the photocatalytic and biodegradation units, the easy volatilization of intermediate products during transportation causing secondary pollution, the easy scaling and deactivation of photocatalytic catalysts, and the easy aging and shedding of biofilms with difficulty in online replenishment, which require further improvement and optimization. Summary of the Invention

[0005] The purpose of this invention is to provide a photocatalytically coupled biodegradation device and method for treating benzene pollutants, thereby achieving efficient, stable, and low-cost treatment of benzene pollutants.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A photocatalytically coupled biodegradation device for treating benzene pollutants includes a main support structure and a coupling degradation mechanism disposed in the main support structure. The main support mechanism includes a main support outer shell with a vertically extending axis, and a main support inner shell coaxial with it inside the main support outer shell. An annular processing chamber with a vertically extending axis is formed between the outer wall of the main support inner shell and the inner wall of the main support outer shell. A spiral partition plate is fixed in the annular treatment chamber and extends spirally around its axis. The spiral helix angle of the spiral partition plate is 10~30°. The spiral partition plate divides the annular treatment chamber into a pollution treatment spiral channel that extends spirally around the axis of the inner shell of the main support. A pollution treatment main input pipe is provided on the outer side of the outer shell of the main support near the bottom, which is connected to the lower end of the pollution treatment spiral channel. A pollution treatment main output pipe is provided on the outer side of the outer shell of the main support near the top, which is connected to the upper end of the pollution treatment spiral channel. Multiple exhaust pipes are provided on the top of the outer shell of the main support, which are connected to the upper end of the pollution treatment spiral channel. Multiple mineralized substrate exhaust pipes are provided on the bottom of the outer shell of the main support, which are connected to the lower end of the pollution treatment spiral channel. The spiral partition plate has multiple catalytic connection openings and degradation connection openings that are perpendicular to its surface. The coupling degradation mechanism includes a photocatalytic support plate connected in the catalytic connection openings and a biodegradable attachment plate connected in the degradation connection openings. The main support outer shell has multiple lighting mechanisms on its side wall, and multiple lighting connection holes that extend radially through the side wall. Each lighting mechanism includes a lighting mechanism support cylinder fixed in the lighting connection hole with its opening facing inward. A sealed sliding piston column is slidably connected in the lighting mechanism support cylinder. A lamp bead support column is fixed at one end of the sealed sliding piston column near the pollution treatment spiral channel. The outer side of the lamp bead support column has multiple lamp bead connection holes. Catalytic lighting lamp beads are installed in the lamp bead connection holes. A light-sealing cover plate is sealed and fixed at the opening end of the lamp bead connection hole.

[0007] Preferably, a photocatalytic support plate is connected to the upper and lower ends of the catalytic connection opening. The surface of the photocatalytic support plate has a titanium dioxide photocatalytic coating. The photocatalytic support plate is connected to the catalytic connection opening through a catalytic connection mechanism. The catalytic connection mechanism includes a first snap-fit ​​protrusion fixed to the inner wall of the catalytic connection opening and close to the outer shell of the main support. A first snap-fit ​​receiving hole is opened on the inner wall of the catalytic connection opening close to the inner shell of the main support. A first snap-fit ​​sliding column is slidably connected in the first snap-fit ​​receiving hole. The photocatalytic support plate has a first snap-fit ​​recess fixed on the outer side of the main support outer cylinder shell, and a first snap-fit ​​protrusion snaps and constrains in the first snap-fit ​​recess. The photocatalytic support plate has a first snap-fit ​​hole coaxial with the first snap-fit ​​receiving hole on the outer side of the main support inner cylinder shell, and a first snap-fit ​​sliding column snaps and constrains in the first snap-fit ​​hole. The first snap-fit ​​receiving hole is provided with a first snap-fit ​​driving rod for driving the first snap-fit ​​sliding column to move.

[0008] Description: The design of the upper and lower double photocatalytic support plates can double the photocatalytic reaction area without increasing the size of the equipment, significantly improving the photocatalytic degradation efficiency per unit space. The catalytic connection mechanism adopts a snap-fit ​​structure. The first snap-fit ​​protrusion and the first snap-fit ​​recess achieve the pre-positioning of the photocatalytic support plate. The first snap-fit ​​drive rod drives the first snap-fit ​​slide to complete locking and unlocking, which can realize the rapid replacement of the photocatalytic support plate, greatly shorten maintenance downtime, and reduce manual maintenance costs.

[0009] Preferably, a first sealing support ring is fixed in the catalytic connection opening, and a first sealing mating ring groove is provided on the upper side and the lower side of the first sealing support ring. A first sealing ring is provided in the first sealing mating ring groove, and the upper side and the lower side of the first sealing support ring are sealed with the two photocatalytic support plates through the first sealing ring. An additional heating cavity is formed inside the first sealing support ring, and an auxiliary heating plate is provided in the additional heating cavity.

[0010] Explanation: The first sealing support ring and the upper and lower photocatalytic support plates form a double-end-face sealing structure through the first sealing ring, which can effectively prevent sewage from leaking from the catalytic connection opening, ensure the stability of the fluid flow in the pollution treatment spiral channel, and avoid the occurrence of short-circuit flow. The auxiliary heating plate in the additional heating cavity can accurately heat the photocatalytic support plate and the surrounding sewage, control the photocatalytic reaction temperature within the optimal activity range of the titanium dioxide photocatalytic coating, solve the problem of a significant decrease in the photocatalytic reaction rate under low temperature conditions, and significantly broaden the environmental applicability of the equipment.

[0011] Preferably, a biodegradable attachment plate is connected to the upper and lower ends of the biodegradable connection opening. A reinforcing support ring is provided around the outer edge of the biodegradable attachment plate. The reinforcing support ring is connected to the biodegradable connection opening through a biodegradable connection mechanism. The biodegradable connection mechanism includes a second snap-fit ​​protrusion fixed to the inner wall of the biodegradable connection opening and close to the outer shell of the main support. A second snap-fit ​​receiving hole is provided on the inner wall of the biodegradable connection opening close to the inner shell of the main support. A second snap-fit ​​sliding column is slidably connected in the second snap-fit ​​receiving hole. The reinforcing support ring is fixed with a second snap-fit ​​recess near the outer side of the main support outer shell, and the second snap-fit ​​protrusion is snap-fitted and constrained in the second snap-fit ​​recess. The reinforcing support ring is provided with a second snap-fit ​​hole coaxial with the second snap-fit ​​receiving hole near the outer side of the main support inner shell, and the second snap-fit ​​sliding column is snap-fitted and constrained in the second snap-fit ​​hole. The second snap-fit ​​receiving hole is provided with a second snap-fit ​​drive rod for driving the movement of the second snap-fit ​​slide.

[0012] Description: The design of the upper and lower double-layer biodegradable attachment plates can significantly increase the microbial attachment area, increase the total amount of biofilm, and enhance the biodegradation capacity of benzene-based pollutants. The biodegradable attachment plates are made of porous ceramic material, and the reinforcing support rings on the outside can significantly improve the structural strength and prevent damage and deformation caused by long-term water flow impact. The degradation connection mechanism adopts the same snap-fit ​​structure as the catalytic connection mechanism, which can realize the quick assembly and disassembly of the biodegradable attachment plates, solve the problem of cumbersome replacement process of traditional biological packing materials, and greatly improve the continuous operation of the equipment.

[0013] Preferably, a second sealing support ring is fixed in the degradation connection opening, and a second sealing mating ring groove is provided on the upper and lower sides of the second sealing support ring. A second sealing ring is provided in the second sealing mating ring groove, and the upper and lower sides of the second sealing support ring are sealed with the two reinforcing support rings through the second sealing ring.

[0014] Explanation: The second sealing support ring and the upper and lower reinforcing support rings form a reliable end face seal through the second sealing ring, which can prevent sewage from leaking from the degradation connection opening and ensure that all sewage flowing through the pollution treatment spiral channel can fully contact the biofilm on the biodegradable attachment plate, avoid the decrease in treatment efficiency caused by short-circuit flow, and maintain the stability of the biofilm.

[0015] Preferably, a microbial replenishment cavity is formed inside the second sealing support ring, and a microbial replenishment mechanism is provided in the microbial replenishment cavity. The microbial replenishment mechanism includes a microbial replenishment shell fixed in the microbial replenishment cavity, and the top and bottom of the microbial replenishment shell are provided with a plurality of replenishment and discharge holes that communicate with each other inside and outside. A bacterial solution storage tank is fixed on the inner wall of the main support inner cylinder shell. The bacterial solution storage tank is equipped with a bacterial solution delivery pump. The output end of the bacterial solution delivery pump is connected to the inside of the microbial replenishment shell through a bacterial solution delivery pipe.

[0016] Description: The microbial replenishment mechanism enables online replenishment of functional microbial communities, maintaining the activity and quantity of the biofilm on the biodegradable attachment plate without shutdown. This solves the problems of microbial loss and decreased activity caused by aging, erosion, and toxicity during long-term operation. The bacterial solution diffuses through the replenishment and drainage holes evenly distributed at the top and bottom of the microbial replenishment shell, penetrating the porous ceramic biodegradable attachment plate from the inside out. This ensures that the bacterial solution is evenly distributed inside and on the surface of the biofilm, significantly improving the microbial replenishment effect and extending the service life of the biofilm.

[0017] Preferably, the outer shell of the main support is provided with multiple ultrasonic strengthening mechanisms on its side wall, and multiple ultrasonic connection holes are provided on the outer shell of the main support along its radial direction. The ultrasonic strengthening mechanism includes an ultrasonic strengthening support cylinder fixed in the ultrasonic connection hole with its opening facing inward. An ultrasonic strengthening support slide column is slidably connected in the ultrasonic strengthening support cylinder, and an ultrasonic generator is fixed at one end of the ultrasonic strengthening support slide column near the pollution treatment spiral channel. The ultrasonic-enhanced support cylinder is equipped with an ultrasonic extension drive rod for driving the movement of the ultrasonic-enhanced support slide column.

[0018] Note: The ultrasonic enhancement mechanism adopts a retractable design. When enhanced treatment is required, the ultrasonic extension drive rod drives the ultrasonic generator to extend into the spiral channel for pollution treatment. When enhancement is not required or equipment maintenance is needed, the ultrasonic generator can be retracted into the ultrasonic enhancement support cylinder. The cavitation effect generated by the ultrasonic waves can simultaneously act on the photocatalysis and biodegradation processes. On the one hand, it breaks up fluid bubbles and improves dissolved oxygen mass transfer efficiency; on the other hand, it cleans the surface of the photocatalytic support plate and prevents the photocatalytic coating from deactivating due to fouling; at the same time, it can also promote the metabolism of microorganisms and enhance the mass transfer process of benzene pollutants between the biofilm and the fluid.

[0019] Preferably, a circulation reflux mechanism is provided on the outer side of the main support outer shell. The circulation reflux mechanism includes multiple circulation reflux branch pipes located on the outer side of the main support outer shell and connected to the pollution treatment spiral channel. The multiple circulation reflux branch pipes are evenly distributed and arranged in the vertical direction at the connection points with the pollution treatment spiral channel. The recirculation reflux branch is equipped with a reflux branch control valve; Multiple circulating return pipes are connected together to form a return buffer storage tank. The return buffer storage tank is equipped with a return conveying pump. The output end of the return conveying pump is connected to the lower end of the pollution treatment spiral channel through a return remote pumping pipe.

[0020] Description: The recirculation mechanism adopts a multi-point recirculation design, with multiple recirculation pipes evenly arranged vertically. The recirculation location and number of pipes can be flexibly selected based on the pollutant concentration detection results at different heights to achieve graded deep treatment. The recirculation buffer storage tank can stabilize the recirculation flow rate and avoid hydraulic impact on the main treatment process caused by the recirculated wastewater. Through recirculation, the residence time of high-concentration benzene series wastewater in the pollution treatment spiral channel can be effectively extended to ensure that pollutants are fully degraded and that the effluent quality consistently meets the standards.

[0021] Preferably, an intermittent jet input mechanism is provided on the outer side of the main support outer shell. The intermittent jet input mechanism includes multiple intermittent jet input pipes located on the outer side of the main support outer shell and near the bottom. The intermittent jet input pipes are connected to the lower end of the pollution treatment spiral channel, and a jet input control valve is provided on the intermittent jet input pipes. The intermittent jet input pipe is connected to a venturi tube, and the narrow neck of the venturi tube is provided with an air communication pipe that communicates with its interior. An air communication check valve is provided on the air communication pipe. The end of the venturi tube furthest from the intermittent jet input pipe is connected to a jet delivery pump via a jet pumping pipe. The jet delivery pump is located in a jet input storage tank.

[0022] Description: The intermittent jet input mechanism automatically draws in outside air using the negative pressure effect of the venturi tube, eliminating the need for additional aeration equipment. It features low energy consumption and a simple structure. The intermittent jet input generates strong turbulent disturbances within the spiral channel of the pollution treatment system, significantly improving the mass transfer efficiency of dissolved oxygen and providing sufficient oxygen conditions for the degradation activities of aerobic microorganisms. The air connection check valve prevents sewage from flowing back into the air connection pipe, ensuring the stability of the system operation. At the same time, the shear force generated by the jet prevents excessive thickening of the biofilm and maintains the high activity of the biofilm.

[0023] This invention also provides a method for treating benzene-based pollutants, based on the aforementioned photocatalytically coupled biodegradation benzene-based pollutant treatment device, comprising the following steps: S1. Pollutant input: Benzene-based wastewater is fed into the lower end of the pollution treatment spiral channel through the main pollution treatment inlet pipe, and the benzene-based wastewater flows from bottom to top in the pollution treatment spiral channel; S2, Coupled Degradation Treatment: During the flow of benzene-based wastewater in the pollution treatment spiral channel, it passes sequentially through multiple sets of photocatalytic support plates and biodegradable attachment plates, where the pollutants in the benzene-based wastewater undergo photocatalytic decomposition and microbial decomposition, respectively. During the photocatalytic decomposition of pollutants, under the irradiation of multiple catalytic light beads, the titanium dioxide photocatalytic coating on the surface of the photocatalytic support plate is excited to generate hydroxyl radicals, which are highly oxidizing active species. This oxidizes and decomposes the recalcitrant benzene macromolecular pollutants in benzene wastewater into small molecule intermediates that are easily bioavailable. During the microbial decomposition of pollutants, the biodegradable attachment plate is a porous ceramic plate. The biodegradable attachment plate is covered with functional microbial communities that degrade benzene series pollutants. When benzene series wastewater flows through the biodegradable attachment plate, the microbial communities can ultimately degrade the small molecule intermediate products generated by photocatalytic decomposition and the undecomposed benzene series pollutants into harmless substances such as carbon dioxide and water. S3, Circulation Reflux Depth Processing: For benzene-based wastewater with a total benzene concentration greater than 500 mg / L, the circulation and return mechanism is activated for deep treatment. The return pipe control valve on the corresponding location of the circulation and return pipe is opened, and the incompletely degraded benzene-based wastewater is collected through the circulation and return pipe to the return buffer storage tank for temporary storage. The return transfer pump then pumps the temporarily stored benzene-based wastewater back to the lower end of the pollution treatment spiral channel through the return remote pumping pipe, where it re-enters the coupled degradation process until the pollutant concentration meets the standards. S4. Discharge of purified wastewater and exhaust gas: After undergoing multiple rounds of coupled degradation to meet standards, benzene-based wastewater is discharged from the top of the pollution treatment spiral channel through the main pollution treatment outlet pipe. The waste gas generated during the treatment process is discharged in a centralized manner through multiple waste gas exhaust pipes at the top of the main support outer cylinder shell, and is discharged after being treated to be harmless and purified. Regularly open the substrate discharge control valve to discharge the mineralized substrate generated during the treatment process through the mineralized substrate discharge pipe.

[0024] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects: 1. This invention adopts a spiral channel structure integrating photocatalysis and biodegradation. During the upward flow of benzene-based wastewater within the pollution treatment spiral channel, it sequentially comes into full contact with multiple sets of photocatalytic support plates and biodegradation attachment plates, achieving continuous synergistic treatment of "photocatalytic pre-oxidation - deep biological degradation". Photocatalysis oxidizes the recalcitrant benzene macromolecules into easily bioavailable small molecule intermediates, eliminating the toxic effects of benzene compounds on microorganisms; biodegradation completely mineralizes the intermediates into carbon dioxide and water, solving the problem of high energy consumption for complete mineralization by single photocatalysis. The spiral channel design significantly extends the wastewater retention time and increases the contact area between pollutants and the treatment medium, resulting in a significantly higher benzene pollutant removal rate compared to traditional series-coupled equipment. 2. This invention integrates four enhancement mechanisms: intermittent jet aeration, ultrasonic enhancement, temperature control, and online microbial replenishment. The intermittent jet input mechanism utilizes a Venturi tube for efficient oxygenation, meeting the growth requirements of aerobic microorganisms. The ultrasonic enhancement mechanism simultaneously enhances photocatalysis and biodegradation processes through cavitation, increasing the photocatalytic reaction rate by approximately 25% and the biodegradation rate by approximately 40%, while effectively preventing scaling of the photocatalytic coating and excessive biofilm thickening. The auxiliary heating plate controls the photocatalytic reaction temperature within the optimal range, maintaining a treatment efficiency of over 80% even in low-temperature environments below 5°C. The microbial replenishment mechanism can replenish functional microorganisms online, maintaining biofilm activity above 90% and significantly extending the continuous operating time of the equipment. 3. Both the photocatalytic support plate and the biodegradable attachment plate of this invention adopt a snap-fit ​​modular design. With the electronic drive of the first snap-fit ​​drive rod and the second snap-fit ​​drive rod, the replacement time of a single plate is greatly shortened, significantly reducing maintenance downtime and labor costs. At the same time, the modular structure facilitates the upgrading and partial replacement of components, reducing the total life cycle cost of the equipment. 4. The circulating reflux mechanism of this invention adopts a multi-point reflux design, which can flexibly adjust the reflux ratio and reflux position according to the influent concentration, and can adapt to the treatment needs of benzene-based wastewater of different concentrations; the operating parameters such as light intensity, ultrasonic power, heating temperature, and jet frequency can all be controlled online through the control system, and the operating conditions can be optimized for different types of benzene-based pollutants; the equipment has a compact structure and is suitable for small and medium-sized wastewater treatment plants in various industries such as petrochemical, coking, pharmaceutical, and printing and dyeing. 5. This invention adopts a fully enclosed structural design. The volatile organic waste gas generated during the treatment process is collected and treated centrally through the waste gas exhaust pipe, and the mineralized substrate is discharged periodically through the mineralized substrate exhaust pipe, effectively avoiding the volatilization and leakage of pollutants. Both photocatalysis and biodegradation are green and environmentally friendly treatment technologies that do not require the addition of any chemical agents and will not produce secondary pollution. At the same time, the equipment has low energy consumption, and the cost per ton of water treated is reduced by more than 40% compared with traditional advanced oxidation processes, which has significant environmental and economic benefits. Attached Figure Description

[0025] Figure 1 This is the front view of the present invention; Figure 2 This is a top view of the main body supporting the outer shell of the present invention; Figure 3 This is a schematic diagram of the illumination mechanism of the present invention; Figure 4 This is a left view of the lamp bead support column of the present invention; Figure 5 This is a schematic diagram of the ultrasonic strengthening mechanism of the present invention; Figure 6 This is a schematic diagram of the catalytic connection mechanism of the present invention; Figure 7 This is a schematic diagram of the degradation connection mechanism of the present invention; Figure 8 This is a schematic diagram of the intermittent jet input mechanism of the present invention.

[0026] In the diagram, 10-Main support structure, 101-Annular treatment chamber, 102-Pollution treatment spiral channel, 103-Exhaust gas discharge pipe, 104-Mineralized substrate discharge pipe, 105-Substrate discharge control valve, 11-Main support outer shell, 111-Pollution treatment main input pipe, 112-Pollution treatment main output pipe, 12-Main support inner shell, 13-Spiral partition plate, 131-Catalytic connection opening, 132-Degradation connection opening, 20-Coupled degradation mechanism, 21-Photocatalytic support plate, 22-Biodegradable attachment plate, 220-Reinforcing support ring, 23-Illumination mechanism, 230-Illumination connection hole. 231-Illumination mechanism support cylinder, 232-Sealed sliding piston column, 233-Lamp bead support column, 234-Lamp bead connection hole, 235-Catalytic illumination lamp bead, 236-Illumination sealing cover plate, 237-Illumination extension drive rod, 24-Ultrasonic enhancement mechanism, 240-Ultrasonic connection hole, 241-Ultrasonic enhancement support cylinder, 242-Ultrasonic enhancement support slide column, 243-Ultrasonic generator, 244-Ultrasonic extension drive rod, 25-Circulation reflux mechanism, 251-Circulation reflux branch pipe, 252-Reflux buffer storage tank, 253-Reflux delivery pump, 254-Reflux remote pumping pipe, 31-Catalytic connector Structure, 311-First snap-fit ​​protrusion, 312-First snap-fit ​​receiving hole, 313-First snap-fit ​​sliding column, 314-First snap-fit ​​mating recess, 315-First snap-fit ​​mating hole, 316-First snap-fit ​​drive rod, 317-First sealing support ring, 318-First sealing mating ring groove, 319-First sealing ring, 32-Degradation connection mechanism, 321-Second snap-fit ​​protrusion, 322-Second snap-fit ​​receiving hole, 323-Second snap-fit ​​sliding column, 324-Second snap-fit ​​mating recess, 325-Second snap-fit ​​mating hole, 326-Second snap-fit ​​drive rod, 327-Second sealing support ring, 328-Second sealing ring The components include: 329-Second sealing ring, 330-Additional heating cavity, 33-Auxiliary heating electric heating plate, 340-Microbial replenishment cavity, 34-Microbial replenishment mechanism, 341-Microbial replenishment shell, 3410-Replenishment external discharge hole, 342-Bacterial liquid storage tank, 343-Bacterial liquid transfer pump, 344-Bacterial liquid transfer pipe, 40-Intermittent jet input mechanism, 41-Intermittent jet input pipe, 410-Jet input control valve, 42-Venturi tube, 43-Air connecting pipe, 430-Air connecting check valve, 440-Jet pumping pipe, 44-Jet transfer pump, and 45-Jet input temporary storage tank. Detailed Implementation

[0027] The following is combined Figures 1-8 The present invention will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of the respective main view or structural schematic diagram.

[0028] Example 1: A photocatalytically coupled biodegradation device for treating benzene-based pollutants, such as... Figure 1 As shown, it includes a main support mechanism 10 and a coupling degradation mechanism 20 disposed in the main support mechanism 10; The main support mechanism 10 includes a main support outer shell 11 with a vertically extending axis, and a main support inner shell 12 coaxial with it is provided inside the main support outer shell 11. An annular processing chamber 101 with a vertically extending axis is formed between the outer side wall of the main support inner shell 12 and the inner side wall of the main support outer shell 11. A spiral partition plate 13 is fixed in the annular treatment chamber 101 and extends spirally around its axis. The spiral helix angle of the spiral partition plate 13 is 10°. The spiral partition plate 13 divides the annular treatment chamber 101 into a pollution treatment spiral channel 102 that extends spirally around the axis of the inner shell 12 of the main support. A pollution treatment main input pipe 111 connected to the lower end of the pollution treatment spiral channel 102 is provided on the outer side of the outer shell 11 of the main support near the bottom. A pollution treatment main output pipe 112 connected to the upper end of the pollution treatment spiral channel 102 is provided on the outer side of the outer shell 11 of the main support near the top. Multiple exhaust pipes 103 connected to the upper end of the pollution treatment spiral channel 102 are provided on the top of the outer shell 11 of the main support. Multiple mineralized substrate exhaust pipes 104 connected to the lower end of the pollution treatment spiral channel 102 are provided on the bottom of the outer shell 11 of the main support. A substrate exhaust control valve 105 is provided on the mineralized substrate exhaust pipe 104. The inner wall of the main supporting outer shell 11 is equipped with multiple sensors that are based on existing technologies for monitoring the concentration of benzene pollutants in benzene-based wastewater; like Figure 2 As shown, the spiral partition plate 13 has multiple catalytic connection openings 131 and degradation connection openings 132 that are perpendicular to its surface and penetrate through it, such as... Figure 2 As shown, the coupling degradation mechanism 20 includes a photocatalytic support plate 21 connected in the catalytic connection opening 131 and a biodegradable attachment plate 22 connected in the degradation connection opening 132. The surface of the photocatalytic support plate 21 has a titanium dioxide photocatalytic coating, which is a prior art technology. like Figure 1 As shown, multiple lighting mechanisms 23 are provided on the side wall of the main supporting outer shell 11, such as... Figure 3As shown, the main supporting outer shell 11 has multiple light-emitting connection holes 230 extending radially through its side wall. The light-emitting mechanism 23 includes a light-emitting mechanism support cylinder 231 fixed in the light-emitting connection holes 230 and opening inward. A sealing sliding piston column 232 is slidably connected in the light-emitting mechanism support cylinder 231. A lamp bead support column 233 is fixed at one end of the sealing sliding piston column 232 near the pollution treatment spiral channel 102. The outer surface of the lamp bead support column 233 has multiple lamp bead connection holes 234, such as... Figure 4 As shown, a catalytic light-emitting lamp 235 is provided in the lamp bead connection hole 234, and a light-emitting sealing cover plate 236 is sealed and fixed at the open end of the lamp bead connection hole 234. The light-reflecting sealed cover 236 is made of existing transparent glass material; The lighting mechanism support cylinder 231 is provided with a lighting extension drive rod 237 for driving the movement of the sealing sliding piston column 232. The lighting extension drive rod 237 is an existing electrically controlled telescopic rod driven by a servo motor. The outer end of the lighting extension drive rod 237 is fixedly connected to the inner end of the lighting mechanism support cylinder 231, and the inner end of the lighting extension drive rod 237 is fixedly connected to the sealing sliding piston column 232.

[0029] like Figure 1 As shown, a circulation reflux mechanism 25 is provided on the outside of the main support outer shell 11. The circulation reflux mechanism 25 includes multiple circulation reflux branch pipes 251 located on the outside of the main support outer shell 11 and connected to the pollution treatment spiral channel 102. The multiple circulation reflux branch pipes 251 are evenly distributed and arranged in the vertical direction at the connection points with the pollution treatment spiral channel 102. A reflux control valve 2510 is provided on the reflux branch pipe 251; Multiple circulating return pipes 251 are connected together to form a return buffer storage tank 252. The return buffer storage tank 252 is equipped with a return conveying pump 253. The output end of the return conveying pump 253 is connected to the lower end of the pollution treatment spiral channel 102 through a return remote pumping pipe 254.

[0030] Example 2: This embodiment describes a method for treating benzene-based pollutants, based on a photocatalytically coupled biodegradation benzene-based pollutant treatment device according to Embodiment 1 above, including the following steps: S1. Pollutant input: Benzene-based wastewater is fed into the lower end of the pollution treatment spiral channel 102 through the pollution treatment main inlet pipe 111, and the benzene-based wastewater flows from bottom to top in the pollution treatment spiral channel 102. S2, Coupled Degradation Treatment: During the flow of benzene-based wastewater in the pollution treatment spiral channel 102, it passes through multiple sets of photocatalytic support plates 21 and biodegradable attachment plates 22 in sequence, where the pollutants in the benzene-based wastewater undergo photocatalytic decomposition and microbial decomposition, respectively. During the photocatalytic decomposition of pollutants, under the irradiation of multiple catalytic light beads 235, the titanium dioxide photocatalytic coating on the surface of the photocatalytic support plate 21 is excited to generate hydroxyl radicals, which are highly oxidizing active species, and oxidize and decompose the recalcitrant benzene macromolecular pollutants in benzene wastewater into small molecule intermediates that are easily bioavailable. In the illumination mechanism 23, the inner rod of the light-injection drive rod 237 can extend to drive the sealing sliding piston rod 232 to move axially along the illumination mechanism support cylinder 231. The sealing sliding piston rod 232 then drives the lamp bead support rod 233 to extend out of the illumination mechanism support cylinder 231, so that the lamp bead support rod 233 extends into the pollution treatment spiral channel 102. The inner rod of the light-injection drive rod 237 can also retract, thereby driving the sealing sliding piston rod 232 together with the lamp bead support rod 233 to retract into the illumination mechanism support cylinder 231. During the microbial decomposition of pollutants, the biodegradable attachment plate 22 is a porous ceramic plate. The biodegradable attachment plate 22 is attached with functional microbial communities that degrade benzene series pollutants. When benzene series wastewater flows through the biodegradable attachment plate 22, the microbial communities can ultimately degrade the small molecule intermediate products generated by photocatalytic decomposition and the undecomposed benzene series pollutants into harmless substances such as carbon dioxide and water. The functional microbial community for degrading benzene series pollutants can be developed using existing technologies. For example, a general-purpose benzene series degrading complex community composed of *Pseudomonas putida* (CGMCC No. 22761), *Rhodococcus ethereans* (CCTCC NO: M20231385), and *Bacillus amyloliquefaciens* (CCTCC No: M208181) can be developed using existing technologies. For example, existing technologies can be used to employ a special composite microbial community for high-salt wastewater, consisting of Sphingomonas NA-3 (CGMCC No. 26509), Rhodococcus SCSIO21391 (GDMCC No: 61076), and Pseudomonas ZB30 (CCTCC No: M2021371). For example, existing technologies can be used to create a low-temperature environment-specific complex microbial community composed of *Pseudomonas sulfadiazine* Ar51 (CGMCC 4.7316), *Pseudomonas aeruginosa* FB1 (CCTCC No: M2018347), and *Bacillus thuringiensis* (CGMCC 1.3665). S3, Circulation Reflux Depth Processing: For benzene-based wastewater with a total benzene concentration greater than 500 mg / L, the circulation and return mechanism 25 is activated for deep treatment. The return pipe control valve 2510 on the corresponding circulation and return pipe 251 is opened, and the incompletely degraded benzene-based wastewater is collected through the circulation and return pipe 251 and temporarily stored in the return buffer storage tank 252. The return transfer pump 253 then pumps the temporarily stored benzene-based wastewater back to the lower end of the pollution treatment spiral channel 102 through the return remote pumping pipe 254, so that it re-enters the coupled degradation process until the pollutant concentration meets the standard. S4. Discharge of purified wastewater and exhaust gas: After undergoing multiple rounds of coupled degradation to meet standards, benzene-based wastewater is discharged from the upper end of the pollution treatment spiral channel 102 through the pollution treatment main output pipe 112. The waste gas generated during the treatment process is discharged in a concentrated manner through multiple waste gas exhaust pipes 103 at the top of the main support outer cylinder shell 11, and is discharged after being treated to be harmless and purified. Periodically open the substrate discharge control valve 105 to discharge the mineralized substrate generated during the treatment process through the mineralized substrate discharge pipe 104.

[0031] Example 3: Based on Example 1, such as Figure 1 As shown, an intermittent jet input mechanism 40 is provided on the outer side of the main supporting outer shell 11, such as... Figure 8 As shown, the intermittent jet input mechanism 40 includes multiple intermittent jet input pipes 41 located on the outside of the main support outer cylinder shell 11 and near the bottom. The intermittent jet input pipes 41 are connected to the lower end of the pollution treatment spiral channel 102, and a jet input control valve 410 is provided on the intermittent jet input pipes 41. The intermittent jet input pipe 41 is connected to a venturi tube 42. The narrow neck of the venturi tube 42 is provided with an air communication pipe 43 that communicates with its interior. An air communication check valve 430 is provided on the air communication pipe 43. The end of the venturi tube 42 away from the intermittent jet input pipe 41 is connected to a jet delivery pump 44 via a jet pumping pipe 440. The jet delivery pump 44 is located in a jet input temporary storage pool 45.

[0032] Example 4: This embodiment describes a method for treating benzene-based pollutants. Based on the photocatalytically coupled biodegradation benzene-based pollutant treatment device of Embodiment 3 above, the difference from Embodiment 2 is that, in S1, during the pollutant input process, the intermittent jet input mechanism 40 is simultaneously activated. The jet delivery pump 44 transports the benzene-based wastewater in the jet input temporary storage tank 45 to the venturi tube 42 through the jet pumping pipe 440. The narrow neck of the venturi tube 42 generates negative pressure and draws in outside air through the air connecting pipe 43, so that the air mixes with the benzene-based wastewater and is then injected into the lower end of the pollution treatment spiral channel 102 through the intermittent jet input pipe 41, mixing with the benzene-based wastewater input through the pollution treatment main input pipe 111, significantly increasing the dissolved oxygen content in the benzene-based wastewater, and providing the necessary oxygen conditions for subsequent biodegradation.

[0033] Example 5: Based on Example 3, such as Figure 1 As shown, multiple ultrasonic strengthening mechanisms 24 are provided on the side wall of the main supporting outer shell 11, such as... Figure 5 As shown, the main support outer cylinder shell 11 has multiple ultrasonic connection holes 240 that extend radially through it on its side wall. The ultrasonic strengthening mechanism 24 includes an ultrasonic strengthening support cylinder 241 fixed in the ultrasonic connection hole 240 and with its opening facing inward. An ultrasonic strengthening support slide column 242 is slidably connected in the ultrasonic strengthening support cylinder 241. An ultrasonic generator 243 is fixed at one end of the ultrasonic strengthening support slide column 242 near the pollution treatment spiral channel 102. The ultrasonic strengthening support cylinder 241 is provided with an ultrasonic extension drive rod 244 for driving the ultrasonic strengthening support slide column 242 to move. The ultrasonic extension drive rod 244 is an existing electrically controlled telescopic rod driven by a servo motor. The outer end of the ultrasonic extension drive rod 244 is fixedly connected to the inner end of the ultrasonic strengthening support cylinder 241, and the inner end of the ultrasonic extension drive rod 244 is fixedly connected to the ultrasonic strengthening support slide column 242.

[0034] Example 6: This embodiment describes a method for treating benzene-based pollutants. Based on the photocatalytically coupled biodegradation benzene-based pollutant treatment device of Embodiment 5, the difference from Embodiment 4 is that in S2, during the microbial decomposition of pollutants, the ultrasonic enhancement mechanism 24 is activated. The inner rod of the ultrasonic extension drive rod 244 extends, causing the ultrasonic enhancement support slide column 242 to extend from the ultrasonic enhancement support cylinder 241. This allows the ultrasonic generator 243 at the end of the ultrasonic enhancement support slide column 242 to extend into the pollution treatment spiral channel 102. The cavitation effect generated by the ultrasonic waves can enhance the decomposition process of benzene-based pollutants. First, the broken fluid bubbles generated by the ultrasonic waves can improve the dissolved oxygen mass transfer efficiency. Second, the high-frequency vibration energy generated by the ultrasonic waves can clean the surface of the photocatalytic support plate 21, preventing scaling and deactivation of the photocatalytic coating. Third, the ultrasonic waves can promote the metabolism of microorganisms on the biodegradable attachment plate 22, enhancing the mass transfer of benzene-based pollutants between the biofilm and the fluid.

[0035] Example 7: Based on Example 5, such as Figure 6 As shown, a photocatalytic support plate 21 is connected to the upper and lower ends of the catalytic connection opening 131. The photocatalytic support plate 21 is connected to the catalytic connection opening 131 through the catalytic connection mechanism 31. The catalytic connection mechanism 31 includes a first snap-fit ​​protrusion 311 fixed to the inner wall of the catalytic connection opening 131 and close to the side of the main support outer cylinder shell 11. A first snap-fit ​​receiving hole 312 is opened on the inner wall of the catalytic connection opening 131 close to the main support inner cylinder shell 12. A first snap-fit ​​sliding column 313 is slidably connected in the first snap-fit ​​receiving hole 312. The photocatalytic support plate 21 has a first snap-fit ​​recess 314 fixed on the outer side of the main support outer cylinder shell 11, and the first snap-fit ​​protrusion 311 snaps and constrains in the first snap-fit ​​recess 314. The photocatalytic support plate 21 has a first snap-fit ​​hole 315 coaxial with the first snap-fit ​​receiving hole 312 on the outer side of the main support inner cylinder shell 12, and the first snap-fit ​​sliding column 313 snaps and constrains in the first snap-fit ​​hole 315. The first snap-fit ​​receiving hole 312 is provided with a first snap-fit ​​driving rod 316 for driving the first snap-fit ​​sliding column 313 to move. The first snap-fit ​​driving rod 316 is an existing electrically controlled telescopic rod driven by a servo motor. The outer end of the first snap-fit ​​driving rod 316 is fixedly connected to the inner end of the first snap-fit ​​receiving hole 312, and the inner end of the first snap-fit ​​driving rod 316 is fixedly connected to the first snap-fit ​​sliding column 313. like Figure 7As shown, a biodegradable attachment plate 22 is connected to the upper and lower ends of the biodegradable connection opening 132. A reinforcing support ring 220 is provided around the outer edge of the biodegradable attachment plate 22. The reinforcing support ring 220 is connected to the biodegradable connection opening 132 through the biodegradable connection mechanism 32. The biodegradable connection mechanism 32 includes a second snap-fit ​​protrusion 321 fixed to the inner wall of the biodegradable connection opening 132 and close to the side of the outer shell 11 of the main support. A second snap-fit ​​receiving hole 322 is provided on the inner wall of the biodegradable connection opening 132 close to the inner shell 12 of the main support. A second snap-fit ​​sliding column 323 is slidably connected in the second snap-fit ​​receiving hole 322. The reinforcing support ring 220 has a second snap-fit ​​recess 324 fixed on the outer side of the main support outer cylinder shell 11, and the second snap-fit ​​protrusion 321 is snap-fitted and constrained in the second snap-fit ​​recess 324. The reinforcing support ring 220 has a second snap-fit ​​hole 325 coaxial with the second snap-fit ​​receiving hole 322 on the outer side of the main support inner cylinder shell 12, and the second snap-fit ​​sliding column 323 is snap-fitted and constrained in the second snap-fit ​​hole 325. The second snap-fit ​​receiving hole 322 is provided with a second snap-fit ​​driving rod 326 for driving the second snap-fit ​​sliding column 323 to move. The second snap-fit ​​driving rod 326 is an existing electrically controlled telescopic rod driven by a servo motor. The outer end of the second snap-fit ​​driving rod 326 is fixedly connected to the inner end of the second snap-fit ​​receiving hole 322, and the inner end of the second snap-fit ​​driving rod 326 is fixedly connected to the second snap-fit ​​sliding column 323.

[0036] Example 8: This embodiment describes a method for treating benzene pollutants. Based on the photocatalytic coupled biodegradation benzene pollutant treatment device of Embodiment 7 above, the difference from Embodiment 6 is that when the photocatalytic coating on the surface of the photocatalytic support plate 21 is deactivated or the biodegradable attachment plate 22 is damaged and blocked in S3, the photocatalytic support plate 21 and the biodegradable attachment plate 22 need to be replaced. The replacement of photocatalytic support plate 21 includes: First, the inner rod of the first snap-fit ​​drive rod 316 retracts, causing the first snap-fit ​​slide 313 to retract into the first snap-fit ​​receiving hole 312, releasing the snap-fit ​​constraint between the first snap-fit ​​slide 313 and the first snap-fit ​​mating hole 315. Then, the photocatalytic support plate 21 can be lifted and pulled out from the side of the first snap-fit ​​mating hole 315. Align the first snap-fit ​​recess 314 of the new photocatalytic support plate 21 with the first snap-fit ​​protrusion 311, then close the entire photocatalytic support plate 21 and place it into the catalytic connection opening 131. Finally, the inner rod of the first snap-fit ​​drive rod 316 extends out and drives the first snap-fit ​​sliding column 313 to extend out from the first snap-fit ​​receiving hole 312 and re-snap and constrain it in the first snap-fit ​​mating hole 315, thereby firmly constraining the photocatalytic support plate 21 in the catalytic connection opening 131. Replacement of biodegradable attachment plate 22: First, the inner rod of the second snap-fit ​​drive rod 326 retracts, causing the second snap-fit ​​slide 323 to retract into the second snap-fit ​​receiving hole 322, releasing the snap-fit ​​constraint between the second snap-fit ​​slide 323 and the second snap-fit ​​mating hole 325. Then, the biodegradable attachment plate 22 can be lifted and pulled out from the side of the second snap-fit ​​mating hole 325. Align the second snap-fit ​​recess 324 of the new biodegradable attachment plate 22 with the second snap-fit ​​protrusion 321, then close the entire biodegradable attachment plate 22 and place it into the degradation connection opening 132. Finally, the inner rod of the second snap-fit ​​drive rod 326 extends out, driving the second snap-fit ​​slide 323 to extend out from the second snap-fit ​​receiving hole 322 and re-snap and constrain it in the second snap-fit ​​mating hole 325, thereby firmly constraining the biodegradable attachment plate 22 in the degradation connection opening 132.

[0037] Example 9: Based on Example 7, such as Figure 6 As shown, a first sealing support ring 317 is fixed in the catalytic connection opening 131. A first sealing engagement ring groove 318 is provided on the upper and lower sides of the first sealing support ring 317. A first sealing ring 319 is provided in the first sealing engagement ring groove 318. The upper and lower sides of the first sealing support ring 317 are sealed with the two photocatalytic support plates 21 through the first sealing ring 319. An additional heating cavity 330 is formed inside the first sealing support ring 317. An auxiliary heating electric heating plate 33 is provided in the additional heating cavity 330. The auxiliary heating electric heating plate 33 is an electric heating plate of the prior art.

[0038] Example 10: This embodiment describes a method for treating benzene-based pollutants. Based on the photocatalytic coupled biodegradation benzene-based pollutant treatment device of Embodiment 9 above, the difference from Embodiment 8 is that in S2, during the photocatalytic decomposition of pollutants, the auxiliary heating plate 33 in the additional heating cavity 330 can be activated according to the reaction temperature requirements to heat the photocatalytic support plate 21 and the surrounding benzene-based wastewater, thereby increasing the photocatalytic reaction rate.

[0039] Example 11: Based on Example 9, such as Figure 7 As shown, a second sealing support ring 327 is fixed in the degradation connection opening 132. A second sealing mating ring groove 328 is provided on the upper and lower sides of the second sealing support ring 327. A second sealing ring 329 is provided in the second sealing mating ring groove 328. The upper and lower sides of the second sealing support ring 327 are sealed with the two reinforcing support rings 220 through the second sealing ring 329.

[0040] like Figure 7 As shown, a microbial replenishment cavity 340 is formed inside the second sealing support ring 327. A microbial replenishment mechanism 34 is provided in the microbial replenishment cavity 340. The microbial replenishment mechanism 34 includes a microbial replenishment shell 341 fixed in the microbial replenishment cavity 340. The microbial replenishment shell 341 has multiple replenishment and discharge holes 3410 that are connected inside and outside at the top and bottom. like Figure 1 As shown, a bacterial liquid storage tank 342 is fixed on the inner wall of the main supporting inner cylinder shell 12. A bacterial liquid transfer pump 343 is provided in the bacterial liquid storage tank 342. The output end of the bacterial liquid transfer pump 343 is connected to the inside of the microbial replenishment shell 341 through the bacterial liquid transfer pipe 344.

[0041] Example 12: This embodiment describes a method for treating benzene-based pollutants. Based on the photocatalytically coupled biodegradation benzene-based pollutant treatment device of Embodiment 11, the difference from Embodiment 10 is that during the microbial decomposition of pollutants in S2, when the activity or number of microorganisms on the surface of the biodegradable attachment plate 22 decreases, the functional microbial community attached to the biodegradable attachment plate 22 is replenished by the microbial replenishment mechanism 34. The bacterial solution delivery pump 343 delivers the bacterial solution in the bacterial solution storage tank 342 to the inside of the microbial replenishment shell 341 through the bacterial solution delivery pipe 344. The bacterial solution is evenly diffused onto the biodegradable attachment plate 22 through the replenishment and discharge holes 3410 at the top and bottom of the microbial replenishment shell 341. The bacterial solution penetrates the biodegradable attachment plate 22 from the inside to the outside and reaches the outer surface of the biodegradable attachment plate 22, thereby achieving the replenishment and maintenance of the activity of the functional microbial community.

[0042] Example 13: The difference from Embodiment 11 is that the spiral helix angle of the spiral partition plate 13 is 20°.

[0043] Example 14: The difference from Example 11 is that the spiral helix angle of the spiral partition plate 13 is 30°.

Claims

1. A photocatalytically coupled biodegradation device for treating benzene-based pollutants, characterized in that, It includes a main support mechanism (10) and a coupling degradation mechanism (20) disposed in the main support mechanism (10); The main support mechanism (10) includes a main support outer shell (11) with a vertically extending axis. The main support outer shell (11) is provided with a main support inner shell (12) coaxial with it. An annular processing chamber (101) with a vertically extending axis is formed between the outer side wall of the main support inner shell (12) and the inner side wall of the main support outer shell (11). The annular processing chamber (101) is fixed with a spiral partition plate (13) that extends spirally around its axis. The spiral partition plate (13) divides the annular processing chamber (101) into a pollution treatment spiral channel (102) that extends spirally around the axis of the main support inner cylinder shell (12). The outer side of the main support outer cylinder shell (11) is provided with a pollution treatment main input pipe (111) connected to the lower end of the pollution treatment spiral channel (102) near the bottom. The outer side of the main support outer cylinder shell (11) is provided with a pollution treatment main output pipe (112) connected to the upper end of the pollution treatment spiral channel (102) near the top. The top of the main support outer cylinder shell (11) is provided with multiple exhaust gas discharge pipes (103) connected to the upper end of the pollution treatment spiral channel (102). The bottom of the main support outer cylinder shell (11) is provided with multiple mineralized substrate discharge pipes (104) connected to the lower end of the pollution treatment spiral channel (102). The spiral partition plate (13) has a plurality of catalytic connection openings (131) and degradation connection openings (132) that are perpendicular to its surface. The coupling degradation mechanism (20) includes a photocatalytic support plate (21) connected in the catalytic connection opening (131) and a biodegradable attachment plate (22) connected in the degradation connection opening (132). The main support outer cylinder shell (11) is provided with multiple lighting mechanisms (23) on its side wall. The main support outer cylinder shell (11) is provided with multiple lighting connection holes (230) that are radially through it. The lighting mechanism (23) includes a lighting mechanism support cylinder (231) fixed in the lighting connection hole (230) and with its opening facing inward. A sealing sliding piston column (232) is slidably connected in the lighting mechanism support cylinder (231). A lamp bead support column (233) is fixed at one end of the sealing sliding piston column (232) near the pollution treatment spiral channel (102). The lamp bead support column (233) has multiple lamp bead connection holes (234) on its outer side. A catalytic lighting lamp bead (235) is provided in the lamp bead connection hole (234). A light-sealing cover plate (236) is sealed and fixed at the opening end of the lamp bead connection hole (234).

2. The photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 1, characterized in that, The upper and lower ends of the catalytic connection opening (131) are each connected to a photocatalytic support plate (21). The surface of the photocatalytic support plate (21) has a titanium dioxide photocatalytic coating. The photocatalytic support plate (21) is connected in the catalytic connection opening (131) through a catalytic connection mechanism (31). The catalytic connection mechanism (31) includes a first snap-fit ​​protrusion (311) fixed to the inner wall of the catalytic connection opening (131) and close to the outer shell (11) of the main body support. A first snap-fit ​​receiving hole (312) is opened on the inner wall of the catalytic connection opening (131) close to the inner shell (12) of the main body support. A first snap-fit ​​sliding column (313) is slidably connected in the first snap-fit ​​receiving hole (312). The photocatalytic support plate (21) has a first snap-fit ​​recess (314) fixed on the outer side of the main support outer cylinder shell (11), and the first snap-fit ​​protrusion (311) is snapped and constrained in the first snap-fit ​​recess (314). The photocatalytic support plate (21) has a first snap-fit ​​hole (315) coaxial with the first snap-fit ​​receiving hole (312) on the outer side of the main support inner cylinder shell (12), and the first snap-fit ​​sliding column (313) is snapped and constrained in the first snap-fit ​​hole (315). The first snap-fit ​​receiving hole (312) is provided with a first snap-fit ​​driving rod (316) for driving the first snap-fit ​​sliding column (313) to move.

3. The photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 1, characterized in that, A first sealing support ring (317) is fixed in the catalytic connection opening (131). The first sealing support ring (317) has a first sealing mating ring groove (318) on its upper and lower sides. A first sealing ring (319) is provided in the first sealing mating ring groove (318). The upper and lower sides of the first sealing support ring (317) are sealed with the two photocatalytic support plates (21) through the first sealing ring (319). An additional heating cavity (330) is formed inside the first sealing support ring (317), and an auxiliary heating plate (33) is provided in the additional heating cavity (330).

4. The photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 1, characterized in that, The upper and lower ends of the degradation connection opening (132) are each connected to a biodegradable attachment plate (22). The outer edge of the biodegradable attachment plate (22) is surrounded by a reinforcing support ring (220). The reinforcing support ring (220) is connected to the degradation connection opening (132) through a degradation connection mechanism (32). The degradation connection mechanism (32) includes a second snap-fit ​​protrusion (321) fixed to the inner wall of the degradation connection opening (132) and close to the outer shell (11) of the main body support. A second snap-fit ​​receiving hole (322) is opened on the inner wall of the degradation connection opening (132) close to the inner shell (12) of the main body support. A second snap-fit ​​sliding column (323) is slidably connected in the second snap-fit ​​receiving hole (322). The reinforcing support ring (220) has a second snap-fit ​​recess (324) fixed on the outer side of the main support outer shell (11), and the second snap-fit ​​protrusion (321) is snapped and constrained in the second snap-fit ​​recess (324). The reinforcing support ring (220) has a second snap-fit ​​hole (325) coaxial with the second snap-fit ​​receiving hole (322) on the outer side of the main support inner shell (12), and the second snap-fit ​​sliding column (323) is snapped and constrained in the second snap-fit ​​hole (325). The second snap-fit ​​receiving hole (322) is provided with a second snap-fit ​​driving rod (326) for driving the second snap-fit ​​slide (323) to move.

5. The photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 1, characterized in that, A second sealing support ring (327) is fixed in the degradation connection opening (132). A second sealing ring groove (328) is provided on the upper and lower sides of the second sealing support ring (327). A second sealing ring (329) is provided in the second sealing ring groove (328). The upper and lower sides of the second sealing support ring (327) are sealed with the two reinforcing support rings (220) through the second sealing ring (329).

6. The photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 5, characterized in that, The second sealing support ring (327) forms a microbial replenishment cavity (340) on its inner side. The microbial replenishment cavity (340) is provided with a microbial replenishment mechanism (34). The microbial replenishment mechanism (34) includes a microbial replenishment shell (341) fixed in the microbial replenishment cavity (340). The microbial replenishment shell (341) has multiple replenishment and discharge holes (3410) that are connected inside and outside at its top and bottom. A bacterial liquid storage tank (342) is fixed on the inner wall of the main supporting inner cylinder shell (12). A bacterial liquid delivery pump (343) is provided in the bacterial liquid storage tank (342). The output end of the bacterial liquid delivery pump (343) is connected to the inside of the microbial replenishment shell (341) through a bacterial liquid delivery pipe (344).

7. The photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 1, characterized in that, The main support outer cylinder shell (11) is provided with a plurality of ultrasonic strengthening mechanisms (24) on its side wall. The main support outer cylinder shell (11) is provided with a plurality of ultrasonic connection holes (240) that are radially through it. The ultrasonic strengthening mechanism (24) includes an ultrasonic strengthening support cylinder (241) fixed in the ultrasonic connection hole (240) and with its opening facing inward. An ultrasonic strengthening support slide column (242) is slidably connected in the ultrasonic strengthening support cylinder (241). An ultrasonic generator (243) is fixed at one end of the ultrasonic strengthening support slide column (242) near the pollution treatment spiral channel (102). The ultrasonic reinforcement support cylinder (241) is provided with an ultrasonic extension drive rod (244) for driving the ultrasonic reinforcement support slide (242) to move.

8. The photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 1, characterized in that, The outer side of the main support outer cylinder shell (11) is provided with a circulation return mechanism (25). The circulation return mechanism (25) includes a plurality of circulation return branch pipes (251) located on the outer side of the main support outer cylinder shell (11) and connected to the pollution treatment spiral channel (102). The multiple circulation return branch pipes (251) are evenly distributed in the vertical direction at the connection points with the pollution treatment spiral channel (102). The circulation return pipe (251) is equipped with a return pipe control valve (2510); Multiple circulating return pipes (251) are connected together to form a return buffer storage tank (252). The return buffer storage tank (252) is equipped with a return delivery pump (253). The output end of the return delivery pump (253) is connected to the lower end of the pollution treatment spiral channel (102) through a return remote pumping pipe (254).

9. The photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 1, characterized in that, An intermittent jet input mechanism (40) is provided on the outside of the main support outer shell (11). The intermittent jet input mechanism (40) includes multiple intermittent jet input pipes (41) located on the outside of the main support outer shell (11) and near the bottom. The intermittent jet input pipes (41) are connected to the lower end of the pollution treatment spiral channel (102). A jet input control valve (410) is provided on the intermittent jet input pipes (41). The intermittent jet input pipe (41) is connected to a venturi tube (42), and the narrow neck of the venturi tube (42) is provided with an air communication pipe (43) communicating with its interior. An air communication check valve (430) is provided on the air communication pipe (43). The end of the Venturi tube (42) away from the intermittent jet input pipe (41) is connected to a jet delivery pump (44) via a jet pumping pipe (440), and the jet delivery pump (44) is located in a jet input storage pool (45).

10. A method for treating benzene-based pollutants, based on the photocatalytically coupled biodegradation benzene-based pollutant treatment device according to claim 8, characterized in that, Includes the following steps: S1. Pollutant input: The benzene-based wastewater is fed into the lower end of the pollution treatment spiral channel (102) through the pollution treatment main inlet pipe (111), and the benzene-based wastewater flows from bottom to top in the pollution treatment spiral channel (102); S2, Coupled Degradation Treatment: During the flow of benzene-based wastewater in the pollution treatment spiral channel (102), it flows sequentially through multiple sets of photocatalytic support plates (21) and biodegradable attachment plates (22), where the pollutants in the benzene-based wastewater undergo photocatalytic decomposition and microbial decomposition, respectively. During the photocatalytic decomposition of pollutants, under the irradiation of multiple catalytic light lamp beads (235), the titanium dioxide photocatalytic coating on the surface of the photocatalytic support plate (21) is excited to generate hydroxyl radicals, which are highly oxidizing active species, and oxidize and decompose the benzene macromolecular pollutants in benzene wastewater into small molecule intermediates that are easily bioavailable. During the microbial decomposition of pollutants, the biodegradable attachment plate (22) is a porous ceramic plate. The biodegradable attachment plate (22) is attached with functional microbial communities that degrade benzene series pollutants. When benzene series wastewater flows through the biodegradable attachment plate (22), the microbial communities can ultimately degrade the small molecule intermediate products generated by photocatalytic decomposition and the undecomposed benzene series pollutants into carbon dioxide and water, which are harmless substances. S3, Circulation Reflux Depth Processing: For benzene series wastewater with a total benzene series concentration greater than 500 mg / L, the circulation reflux mechanism (25) is started for deep treatment. The reflux branch control valve (2510) on the corresponding reflux branch (251) is opened. The incompletely degraded benzene series wastewater is collected through the reflux branch (251) and temporarily stored in the reflux buffer storage tank (252). The return transfer pump (253) then pumps the temporarily stored benzene-based wastewater back to the lower end of the pollution treatment spiral channel (102) through the return remote pumping pipe (254) and re-enters the coupled degradation process until the pollutant concentration reaches the standard. S4. Discharge of purified wastewater and exhaust gas: After undergoing multiple rounds of coupled degradation to meet standards, the benzene-based wastewater is discharged from the upper end of the pollution treatment spiral channel (102) through the pollution treatment main output pipe (112); The waste gas generated during the treatment process is discharged in a concentrated manner through multiple waste gas exhaust pipes (103) at the top of the main support outer cylinder shell (11), and is discharged after being treated with harmless purification. The substrate discharge control valve (105) is opened periodically to discharge the mineralized substrate generated during the treatment process through the mineralized substrate discharge pipe (104).

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