Sewage treatment device with sensitized three-dimensional electrode combined with bio-membrane reactor

Abstract

The utility model discloses a sewage treatment device with a sensitized three-dimensional electrode combined with a bio-membrane reactor, which relates to the technical field of sewage treatment and comprises an optical / electric advanced oxidation pond and a bio-membrane reaction pond, the left side of the optical / electric advanced oxidation pond is connected with a water inlet, and a cathode, an anode and a sensitized particle electrode are arranged in the optical / electric advanced oxidation pond; the cathode is a graphite fiber felt electrode coated with a photo / electro-catalyst, and the anode is a metal mesh electrode; electrode plates of the cathode and the anode are connected with an external direct-current power supply through electric wires; the exterior of the photoelectric advanced oxidation pond is irradiated by a solar light source; according to the utility model, a doped sensitized particle electrode optical / electric advanced oxidation device and a doped sensitized particle electrode optical / electric advanced oxidation method are combined with a moving bed-fixed bed bio-membrane reactor to form a linked coupling system, so that the collaboration between coupling devices is fully exerted, the operation flexibility and the treatment efficiency of the sewage treatment device are improved, the facility configuration is simplified, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially relates to a sensitized three-dimensional electrode combined biofilm reactor sewage treatment device. BACKGROUND

[0002] In view of the problems of high pollution degree, great toxicity and difficult degradation of industrial wastewater, and the problems of traditional photo-electric advanced oxidation wastewater treatment technology such as energy consumption, cost reduction, low treatment flexibility, long cycle and large area, the present application provides a kind of metal doped activated carbon particle electrode photo / electric advanced oxidation combined-moving bed / fixed bed biofilm reactor sewage treatment device, to improve and improve the processing efficiency of existing device, improve operation flexibility, save cost.

[0003] Particle Electrode is generally composed of metal or carbon-based materials with good electrical conductivity. It has a large surface area and high electrical conductivity, and is widely used in electrochemical water treatment technology. Particle Electrode can increase the contact area with sewage, improve current conduction efficiency, and improve the removal efficiency of harmful substances such as heavy metals and organic pollutants.

[0004] Doped Sensitized Particle Electrode is an electrode that further improves current conduction efficiency and electrocatalytic activity by incorporating other sensitizing components such as metals, semiconductor nanomaterials, and conductive polymers into the particles. In the field of water treatment, the application of doped sensitized particle electrodes has good application value. Sensitizers such as metal catalysts can improve light absorption efficiency and provide more reaction sites on the electrode surface, accelerating the rate of electrochemical reaction and improving water treatment efficiency.

[0005] Membrane Biological Reactor (MBR) is a water treatment process that combines biological degradation and membrane separation technology, widely used in wastewater treatment, wastewater reuse and other fields. Its main principle is to degrade pollutants by microorganisms in the biofilm, while effectively removing suspended solids, microorganisms and some dissolved pollutants by membrane separation technology. Biofilm reactors can be divided into fixed bed biofilm reactors and moving bed biofilm reactors. Fixed-bed biofilm reactor (FBBR) uses carriers (such as plastic, ceramic, etc.) as the main body of the reactor, which provides a surface for microorganisms to attach and grow. On the surface of these carriers, microorganisms form biofilms that can effectively degrade organic matter and nitrogen, phosphorus and other pollutants in wastewater, thereby achieving high treatment efficiency and stability. However, in its application process, it also faces problems such as biofilm shedding, uneven mass transfer, long treatment period and membrane fouling. The principle of moving bed biofilm reactor (MBBR) is to put a suspended filler with a density close to water into the reactor as a microbial growth carrier. The biofilm formed on the carrier can increase the biomass of the treatment unit, and rely on the flow of the filler to promote the full contact between the biofilm and the sewage, achieving efficient sewage treatment. This technology has the advantages of abundant biomass, strong impact load resistance, and less excess sludge, but due to the characteristics of the filler, it is easy to aggregate, leading to uneven distribution in water, and water flow scouring may cause microbial loss and other problems.

[0006] Combining fluidized bed and fixed bed biofilm reactors together, the fixed bed part can provide stable biofilm support, enhance the treatment capacity and stability of the system, and avoid excessive flushing and loss of microorganisms in the fluidized bed; while the fluidized bed part can provide better mixing and contact efficiency, avoid sediment accumulation and dead zone generation, reduce energy consumption and system maintenance requirements, and the designed water treatment device combines both, which is more conducive to fully exerting the characteristics of each other, complementary advantages, improving water treatment efficiency and system stability.

[0007] Neither single doped sensitized particle electrode nor biofilm reactor water treatment method and device can simultaneously consider the problems of improving water treatment efficiency, saving cost, operation flexibility and facility simplification.

[0008] Therefore, the utility model provides a sensitized three-dimensional electrode combined biofilm reactor sewage treatment device, which combines doped sensitized particle electrode photo / electric advanced oxidation device and method with moving bed-fixed bed biofilm reactor to become a linkage coupling system, fully exerts the synergism between the coupling devices, improves the operation flexibility and treatment efficiency of the sewage treatment device, and simplifies the facility configuration and reduces the cost. Utility model content

[0009] The utility model discloses a kind of sensitized three-dimensional electrode combined biofilm reactor sewage treatment devices to solve the defects in prior art.

[0010] To achieve the above object, the utility model adopts the following technical scheme:

[0011] A sensitized three-dimensional electrode combined biofilm reactor sewage treatment device, including light / electricity advanced oxidation tank, biofilm reaction tank, the left side of the light / electricity advanced oxidation tank is connected with water inlet, cathode, anode, sensitized particle electrode are equipped in light / electricity advanced oxidation tank;

[0012] The cathode is graphite fiber felt electrode coated with light / electrocatalyst, and the anode is metal mesh electrode.

[0013] The electrode plate of the cathode and the anode is connected to an external DC power source through an electric wire, and the light / electricity advanced oxidation tank is externally irradiated by a sunlight source.

[0014] The bottom of the light / electricity advanced oxidation tank is provided with a plurality of magnetic stirring rotors, which are connected to an external stirring support control console.

[0015] The intermediate water bucket is connected to a water quality detection panel, and the right side of the bottom of the intermediate water bucket is provided with a second water outlet connected to the biofilm reaction tank through a conduit.

[0016] The bottom of the biofilm reaction tank is provided with an aeration chamber, which has an aeration head connected to an external aeration fan, and the aeration chamber is provided with an aeration hole.

[0017] The water quality detector is connected to a circulating pump and a water quality shunt.

[0018] Further, the left side of the light / electricity advanced oxidation tank is provided with a water inlet, and the interior of the light / electricity advanced oxidation tank has two anodes and two cathodes.

[0019] Further, the light / electric advanced oxidation tank is filled with sensitized particle electrodes as the third electrode, and a plurality of magnetic stirrer rotors are arranged at the bottom of the light / electric advanced oxidation tank, the stirring speed is controlled by a stirring support control console at the bottom of the light / electric advanced oxidation tank, a direct current power supply is connected with the cathode and the anode outside the light / electric advanced oxidation tank, a sunlight source is arranged outside the light / electric advanced oxidation tank, a water outlet is arranged at the right end of the light / electric advanced oxidation tank and connected with an intermediate water bucket through a conduit, ball valves and circulating pumps are arranged on the inlet and outlet pipes of each stage to control the inlet and outlet of wastewater, the intermediate water bucket is connected with the biological membrane reaction tank through a water guide pipe and a circulating pump for coupling treatment, and a throttle valve and a water inlet are arranged on the conduit.

[0020] Further, the biological membrane reaction tank is in a cylindrical structure, and the biological membrane reaction tank is in a porous cylindrical structure, and a magnesium-aluminum alloy frame is arranged inside the biological membrane reaction tank.

[0021] Further, the material of the fixed bed biological membrane reactor carrier is selected from any one of porous polyvinylidene fluoride, porous polyethylene, porous polyurethane and porous polypropylene.

[0022] Further, the biological membrane reaction tank is internally provided with suspended fillers, and the suspended fillers are selected from polymer materials as biological membrane carriers, and the polymer materials include any one of porous polyurethane sponge, polyurethane hydrogel, porous polypropylene filler and porous polyethylene filler.

[0023] The carriers have a large specific surface area due to the porous and permeable structure, and are more likely to attach microorganisms. The suspended fillers are arranged inside the cylindrical fixed bed biological membrane reactor, so as to ensure that the suspended fillers are uniformly distributed in the tank, and solve the problem that the suspended fillers are prone to aggregation and result in uneven distribution in water; the moving bed biological membrane carrier can be selected from polyurethane gel, polyurethane sponge, porous polyethylene, porous polyurethane, porous polypropylene and porous ceramic, so as to facilitate the attachment and growth of microorganisms.

[0024] The fixed bed reactor and the arranged suspended filler carrier can grow microbial membranes, and form a fixed bed-moving bed biological membrane reactor; the activated sludge added to the fixed bed-moving bed biological membrane reactor serves as a microbial source, and the activated sludge is domesticated in the wastewater to grow microbial membranes in the reactor.

[0025] The fixed bed membrane porcelain material bottom is provided with water permeable holes, the diameter of the water permeable holes is 1-2 cm, and the area of the water permeable holes is 1 / 5-1 / 10 of the area of the fixed bed bottom. The water permeable holes facilitate the entry and exit of biological activated sludge, wastewater and gas, and the cylinder wall, the inside of the cylinder and the outside of the cylinder are provided with aeration heads which are aerated by an aerator, the bottom aeration chamber is provided with aeration holes for providing aeration to the system, performing aerobic explosion, cultivating biological membranes, and forming a biological membrane reactor.

[0026] The treated wastewater is discharged through a water outlet pipe, and the water quality is detected by a water quality detector; when the water quality at the water outlet does not meet the standard, the degree of non-compliance is determined, and the circulating pump is used to flow back into the sensitized particle electrode photo / electric advanced oxidation system or the fixed bed-moving bed biofilm reactor for secondary treatment until the COD is less than 50 mg / L and the ammonia nitrogen value is less than 15 mg / L, so that the wastewater meets the national first emission standard and is discharged or recycled.

[0027] A PLC monitoring unit is arranged at the bottom of the photo / electric advanced oxidation tank, which can monitor the current, light intensity, mechanical stirrer speed, water quality and other key parameters in the oxidation tank in real time, and automatically adjust the working state of the system according to the monitoring result, so as to ensure the stability and efficiency of the system.

[0028] A throttle valve and a water inlet are arranged on the pipe, so that the sewage flow and the water quality parameters can be conveniently controlled.

[0029] Compared with the prior art, the utility model has the advantages that:

[0030] 1. In the utility model, the sensitized components (nickel, bismuth and manganese) are doped in the particles, so that the electrode surface reaction can be optimized, the conductivity and the electrocatalytic oxidation and reduction reaction rate and selectivity can be improved, the photo / electric oxidation reaction activity can be enhanced, more reaction sites can be provided, and the water treatment efficiency can be improved.

[0031] 2. In the utility model, the compound electrode and the WSe2 / Zn3(OH)2V2O7 photocatalyst attached to the cathode are used to generate photo-generated electrons and free radicals through visible light or sunlight radiation, the free radicals have the photocatalytic effect of degrading wastewater pollutants, the photo-generated electrons and holes are quickly separated under the action of the electric field, the quick separation of the photo-generated electrons and holes further improves the electrochemical reaction rate of the anode and the cathode in the electric field, and the photoelectric conversion efficiency of the whole device is improved, so that the photo / electric catalytic oxidation reaction activity and the water treatment efficiency are improved. The combination of the photocatalytic effect of the high-catalytic-reactivity semiconductor WSe2 / Zn3(OH)2V2O7 and the electrochemical catalytic reaction is more helpful to improve the pollutant removal efficiency.

[0032] 3. The utility model combines the fluidized bed and the fixed bed biofilm reactor together, the fixed bed part can provide stable biofilm support, enhance the treatment capacity and stability of the system, avoid excessive flushing and loss of microorganisms in the fluidized bed, and the fluidized bed part can provide better mixing and contact efficiency, avoid the accumulation of sediments and the generation of dead zones, reduce energy consumption and maintenance requirements of the system, and the designed water treatment device combines the two together, which is more conducive to fully exerting the characteristics of each other, complementing each other's advantages, improving the water treatment efficiency and the system stability.

[0033] 4、The utility model discloses the indirect coupling of the integration of sensitized granular electrode photo / electric advanced oxidation and fluidized bed and fixed bed biofilm reactor two kinds of devices, also set up system circulation processing device, when effluent does not reach the standard, wastewater can flow into any one among sensitized granular electrode photo / electric device or biological reactor device, can select according to the needs reflux circulation mode, ensure that wastewater reaches the index of deep processing and recycling.

[0034] 5、The utility model discloses the problem of high energy consumption, catalyst circulation number limit, catalyst cannot retrieve secondary pollution in photo / electric advanced oxidation process, traditional sewage treatment equipment can not possibly keep stable processing effect when water quality changes greatly (such as pollutant concentration fluctuation), and the device has strong adaptability, and through the automatic adjustment operation parameter of intelligent control system, can respond to the fluctuation of different water quality, ensure stable and efficient treatment of sewage.

[0035] In conclusion, the utility model discloses the combination of doped sensitized granular electrode photo / electric advanced oxidation device and method and moving bed-fixed bed biofilm reactor, becomes a kind of linkage coupling system, fully exerts the synergism between coupling device, improves the operation flexibility and processing efficiency of sewage treatment device, simultaneously simplifies facility configuration, reduces cost. ACCOUT OF DRAWINGS

[0036] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model.

[0037] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0038] Fig. 2 It is the schematic diagram of sensitized granular electrode and photo / electric advanced oxidation device;

[0039] Fig. 3 It is the schematic diagram of biofilm reaction pool.

[0040] In the figure: 1. light / electricity oxidation tank, 2. stirring support console, 3. anode, 4. sensitized particle electrode, 5. cathode, 6. magnetic stirring rotor, 7. water inlet, 8. first water outlet, 9. direct current power supply, 10. photocatalyst, 11. intermediate water bucket, 12. water quality detection panel, 13. first water outlet, 14. sunlight source, 15. throttle valve and water outlet, 16. water inlet, 17. biological membrane reactor water inlet, 18. aeration chamber, 19. aeration head, 20. suspended filler, 21. metal framework, 22. water outlet pipe, 23. fixed bed biological membrane reactor carrier, 24. fixed bed biological membrane reactor aeration hole, 25. aeration chamber aeration hole, 26. aeration pipe, 27. aeration fan, 28. biological membrane reactor tank, 29. water quality detector, 30. water quality diverter, 31. circulating pump, 32. diverter conduit, 33. biological membrane tank water inlet. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model;

[0042] Reference Figs. 1-3 A sensitized three-dimensional electrode combined biological membrane reactor wastewater treatment device, the light / electricity advanced oxidation tank 1 is connected with the water inlet 7 on the left side, the light / electricity advanced oxidation tank 1 is equipped with the cathode 5, the anode 3 and the sensitized particle electrode 4, the electrode plate of the cathode 5 and the anode 3 is connected with the external direct current power supply 9 through the wire, and the light / electricity advanced oxidation tank 1 is irradiated by the sunlight source 14 outside;

[0043] The bottom of the light / electricity advanced oxidation tank 1 is equipped with a plurality of magnetic stirring rotors 6, the magnetic stirring rotors 6 are connected with the stirring support console 2 outside, the right side of the light / electricity advanced oxidation tank 1 is equipped with the first water outlet 8 connected with the intermediate water bucket 11 through the conduit, the conduit is equipped with the throttle valve and the water outlet 15; the intermediate water bucket 11 is connected with the water quality detection panel 12, the right side bottom of the intermediate water bucket 11 is equipped with the second water outlet 13 connected with the biological membrane reactor tank 28 through the conduit, the bottom of the biological membrane reactor tank 28 is equipped with the aeration chamber 18, the aeration chamber 18 has the aeration head 19 connected with the external aeration fan 27, and the aeration chamber 18 is provided with the aeration hole 25, the biological membrane reactor tank 28 is equipped with the cylindrical fixed bed biological membrane reactor carrier 23, the fixed bed biological membrane reactor carrier 23 is equipped with the suspended filler 20, the fixed bed biological membrane reactor carrier 23 is supported by the metal framework 21, and the right side of the biological membrane reactor tank 28 has the water outlet pipe 22, and the water outlet pipe 22 is equipped with the water quality detector 29;

[0044] The water quality detector 29 is connected with the circulating pump 31 and the water quality shunt 30 through the shunt conduit 32; the water quality shunt 30 is connected with the circulating pump 31 and the water inlet 7 through the shunt conduit 32, and the water quality shunt 30 is connected with the circulating pump 31 and the second water outlet 13 through the shunt conduit 32.

[0045] The light / electric advanced oxidation tank 1 is provided with a water inlet 7 on the left side, and two anodes 3 and two cathodes 5 are arranged inside the light / electric advanced oxidation tank 1; the electrode plates of the anodes 3 and the cathodes 5 are arranged in parallel, and the spacing between two electrode plates is 20-40 cm.

[0046] The cathode 5 is attached with a layer of photocatalyst film; the photogenerated electrons and free radicals generated by the photocatalyst have photocatalytic effect on degrading wastewater pollutants, and can promote the separation of photogenerated electrons and holes under the action of an electric field, improve the photoelectric conversion efficiency, and synergistically improve the photoelectrocatalytic oxidation reaction activity and water treatment efficiency.

[0047] The main body of the light / electric advanced oxidation tank 1 is in the shape of a cuboid, and the material is any one of plastic, acrylic, organic glass, glass steel, quartz glass, and enamel.

[0048] The light / electric advanced oxidation tank 1 is filled with a sensitized granular electrode 4 as a third electrode, and a plurality of magnetic stirrer rotating tools are arranged at the bottom of the light / electric advanced oxidation tank 1; the stirring speed is controlled by a stirring support control console at the outer bottom of the light / electric advanced oxidation tank 1; a direct current power supply is connected with the cathode and the anode outside the light / electric advanced oxidation tank 1; a sunlight source is arranged outside the light / electric advanced oxidation tank 1; a water outlet is arranged at the right end of the light / electric advanced oxidation tank 1 and connected with the intermediate water bucket 11 through a conduit; the inlet and outlet pipes of each stage are provided with ball valves and circulating pumps to control the inlet and outlet of wastewater; the intermediate water bucket 11 is connected with the biological membrane reactor 28 through a water guide pipe and a circulating pump for coupling treatment; a throttle valve and a water inlet 15 are arranged on the conduit.

[0049] The main body of the biological membrane reactor 28 is in the structure of a cylinder, and the biological membrane reactor 28 is arranged in the form of a porous cylinder; a magnesium-aluminum alloy frame is arranged inside the biological membrane reactor 28 to ensure the integrity of the fixed-bed biological membrane and solve the problems of easy falling off of the biological membrane and floating of the carrier.

[0050] The material of the fixed-bed biological membrane reactor carrier 23 is selected from any one of porous polyvinylidene fluoride, porous polyethylene, porous polyurethane, and porous polypropylene.

[0051] The biological membrane reactor 28 is provided with a suspended filler 20, and the suspended filler 20 is selected as a biological membrane carrier from a polymer material, which includes any one of porous polyurethane sponge, polyurethane hydrogel, porous polypropylene filler, and porous polyethylene filler.

[0052] The carriers have large specific surface area due to their porous and permeable structure, and are more likely to attach microorganisms. The suspended filler is arranged inside the cylindrical fixed bed biofilm reactor, and the suspended filler is uniformly distributed in the pool, solving the problem of uneven distribution of suspended filler in water due to aggregation of the suspended filler; the moving bed suspended filler biofilm carrier can be made of polyurethane gel, polyurethane sponge, porous polyethylene, porous polyurethane, porous polypropylene, etc., and porous ceramic materials, which are convenient for the attachment and growth of microorganisms.

[0053] The fixed bed reactor and the suspended filler carrier arranged therein can grow microbial membranes, forming a fixed bed-moving bed biofilm reactor; the activated sludge added to the fixed bed-moving bed biofilm reactor serves as a microbial source, and the microbial membrane is grown through the domestication reaction of the activated sludge in the wastewater.

[0054] The fixed bed biofilm ceramic material is supported at the bottom and has water permeable holes with a diameter of 1-2 cm and an area of 1 / 5-1 / 10 of the bottom area of the fixed bed. The water permeable holes facilitate the entry and exit of biological activated sludge, wastewater and gas, and the cylinder wall, inside and outside the cylinder are provided with aeration heads for aeration by an aerator, and the bottom aeration chamber is provided with aeration holes for providing aeration to the system, carrying out aerobic explosion, cultivating biological membranes, and forming a biological membrane reactor.

[0055] The treated wastewater is detected by the water quality detector 29, and after passing the detection, it is discharged through the outlet pipe 22 or recycled. When the water quality at the outlet does not meet the standard, it is returned to the photo / electro advanced oxidation tank 1 by the circulating pump 31 or enters the biological membrane tank 28 through the biological membrane tank inlet 33 for secondary treatment until the COD is less than 50 mg / L and the ammonia nitrogen value is less than 15 mg / L, meeting the national first-level discharge standard.

[0056] A PLC monitoring unit is arranged at the bottom of the photo / electro advanced oxidation tank 1, which can monitor the current, light intensity, mechanical stirrer speed, water quality and other key parameters in the photo / electro advanced oxidation tank 1 in real time, and automatically adjust the working state of the system according to the monitoring results, so as to ensure the stability and efficiency of the system.

[0057] The conduit is provided with a throttle valve and a water inlet 15, which is convenient for controlling the sewage flow and detecting the water quality parameters.

[0058] The size and thickness, type and amount of catalyst coated thereon, and the number of anode and cathode sheets of the sensitized particle electrode, anode and cathode electrodes and assemblies can be adjusted, added or subtracted within a certain allowable range, and timely disassembled and replaced, and the disassembly, replacement and maintenance of the electrodes are relatively easy.

[0059] The fixed bed, the type of suspended filler carrier, the size and porosity of the assembled component can be adjusted within a certain range according to the water quality, and the fixed bed can be recycled, cleaned, reprocessed, reused or replaced.

[0060] The basic particle electrode of the utility model can be porous activated carbon particles, porous graphite sheets, carbon nanotubes and other materials, and the particle size is 1-4 mm. The doped sensitized component is composed of nickel, bismuth and manganese metal powders.

[0061] In one embodiment of the utility model, the cathode and the anode can be composed of graphite plates, foamed titanium, foamed nickel, titanium mesh, nickel mesh, graphite felt, carbon fiber felt, ruthenium iridium titanium material and the like, the electrode plate has a length of 5-10 cm, a height of 5-20 cm and a thickness of 4-6 mm.

[0062] In one embodiment of the utility model, the cathode is coated with a WSe2 / Zn3(OH)2V2O7 photocatalyst.

[0063] In one embodiment of the utility model, the water outlet of the photo / electric advanced oxidation tank 1 is provided with a filter screen, which can prevent the doped sensitized particle electrode from entering the conduit and blocking the conduit with the water flow.

[0064] Working principle:

[0065] The industrial wastewater enters the photo / electric advanced oxidation tank 1 through the water inlet pipe 7, is stirred by the magnetic stirring rotor 6, is irradiated by the sunlight source 14 and is electrolytically treated, and then is discharged from the first water outlet 8, enters the intermediate water bucket 11 through the conduit, and is provided with a throttling valve water inlet 15 on the conduit. The water quality detection panel 12 is arranged on the intermediate water bucket 11, and the water quality detection panel 12 can be used to observe the water outlet parameters at any time. Then the wastewater enters the biofilm reaction tank 28 through the conduit, and the air pump 27 pumps air into the biofilm reaction tank 28. The air is discharged through the air diffuser head 19 in the aeration chamber 18, and the suspended filler 20 is uniformly distributed in the fixed bed biofilm carrier 23. The wastewater is biologically treated in the biofilm reaction tank 28, and then is discharged from the water outlet pipe 22. When the water quality detector 29 detects that the water quality does not meet the standard, the wastewater is treated again through the reflux device composed of the water quality shunt 30, the circulating pump 31 and the shunt conduit 32. When the concentration of the wastewater pollutants is too high, the wastewater flows to the water inlet pipe 7 at the water quality shunt 30 to be treated again in the photo / electric advanced oxidation tank 1, or enters the biofilm reaction tank 28 from the biofilm tank inlet 33 to be biologically treated.

Claims

1. A sensitized three-dimensional electrode combined biofilm reactor sewage treatment device, comprising a photo / electric advanced oxidation tank (1), a biofilm reaction tank (28), characterized in that, The left side of the photo / electric advanced oxidation tank (1) is connected with a water inlet (7), and the photo / electric advanced oxidation tank (1) is provided with a cathode (5), an anode (3) and a sensitized particle electrode (4). The cathode (5) is a graphite fiber felt electrode coated with a photo / electric catalyst, and the anode (3) is a metal mesh electrode. The electrode plates of the cathode (5) and the anode (3) are connected with an external direct current power supply (9) through wires, and the photo / electric advanced oxidation tank (1) is irradiated by an external solar light source (14). The bottom of the photo / electric advanced oxidation tank (1) is provided with a plurality of magnetic stirring rotors (6) connected with an external stirring support control console (2), the right side of the photo / electric advanced oxidation tank (1) is provided with a first water outlet (8) connected with an intermediate water bucket (11) through a conduit, and the conduit is provided with a throttle valve and a water outlet (15). The intermediate water bucket (11) is connected with a water quality detection panel (12), the right side of the intermediate water bucket (11) is provided with a second water outlet (13) connected with a biofilm reactor tank (28) through a conduit, the bottom of the biofilm reactor tank (28) is provided with an aeration chamber (18) having an aeration head (19) connected with an external aeration fan (27), and the aeration chamber (18) is provided with an aeration hole (25), the biofilm reactor tank (28) is provided with a cylindrical fixed bed biofilm reactor carrier (23), the fixed bed biofilm reactor carrier (23) is provided with a suspended filler (20), and the fixed bed biofilm reactor carrier (23) is supported by a metal framework (21), the right side of the biofilm reactor tank (28) is provided with a water outlet pipe (22) provided with a water quality detector (29). The water quality detector (29) is connected with a circulating pump (31) and a water quality shunt (30) through a shunt conduit (32), the water quality shunt (30) is connected with the circulating pump (31) and the water inlet (7) through the shunt conduit (32), and the water quality shunt (30) is connected with the circulating pump (31) and the second water outlet (13) through the shunt conduit (32).

2. The sensitized three-dimensional electrode combined biofilm reactor wastewater treatment device according to claim 1, characterized in that, The left side of the photo / electric advanced oxidation tank (1) is provided with a water inlet (7), and the photo / electric advanced oxidation tank (1) is internally provided with two anodes (3) and two cathodes (5), the electrode plates of the anodes (3) and the cathodes (5) are arranged in parallel, and the distance between the two electrode plates is 20-40 cm.

3. The sensitized three-dimensional electrode combined biofilm reactor wastewater treatment device according to claim 1, characterized in that, The main body of the photo / electric advanced oxidation tank (1) is in the shape of a rectangular cuboid, and the material is any one of plastic, acrylic, organic glass, glass steel, quartz glass and enamel.

4. The sensitized three-dimensional electrode combined biofilm reactor wastewater treatment device according to claim 1, characterized in that, The light / electric advanced oxidation tank (1) is filled with a sensitized particle electrode (4) as a third electrode, a plurality of magnetic stirrer rotating tools are arranged at the bottom of the light / electric advanced oxidation tank (1), the stirring speed is controlled by a stirring support control console at the outer bottom of the light / electric advanced oxidation tank (1), a direct current power supply is connected with the cathode and the anode outside the light / electric advanced oxidation tank (1), a sunlight source is arranged outside the light / electric advanced oxidation tank (1), a water outlet is arranged at the right end of the light / electric advanced oxidation tank (1) and is connected with an intermediate water bucket (11) through a conduit, ball valves and circulating pumps are arranged on the inlet and outlet water pipes of each stage to control the inlet and outlet of wastewater, the intermediate water bucket (11) is connected with the biological membrane reaction tank (28) through a water guide pipe and a circulating pump to perform coupling treatment, and a throttle valve and a water inlet (15) are arranged on the conduit.

5. The sensitized three-dimensional electrode combined biofilm reactor wastewater treatment device according to claim 1, characterized in that, The biological membrane reaction tank (28) is in a cylindrical structure, the biological membrane reaction tank (28) is arranged as a porous cylinder, and a magnesium-aluminum alloy frame support is arranged in the biological membrane reaction tank (28).

6. The sensitized three-dimensional electrode combined biofilm reactor wastewater treatment device according to claim 1, characterized in that, The material of the fixed bed biological membrane reactor carrier (23) is selected from any one of porous polyvinylidene fluoride, porous polyethylene, porous polyurethane and porous polypropylene.

7. The sensitized three-dimensional electrode combined biofilm reactor wastewater treatment device according to claim 1, characterized in that, The biological membrane reaction tank (28) is internally provided with a suspended filler (20), and the suspended filler (20) is selected from a polymer material as a biological membrane carrier, and the polymer material includes any one of porous polyurethane sponge, polyurethane hydrogel, porous polypropylene filler and porous polyethylene filler.

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