Wastewater treatment system
By combining a silicon carbide membrane reactor and photocatalytic oxidation technology, the wastewater treatment system solves the problems of large dosage of traditional Chinese medicine, high cost, and substandard water quality in the deep treatment of livestock farm wastewater. It achieves efficient purification and reuse of wastewater, and reduces equipment footprint and sludge generation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-03-24
AI Technical Summary
Existing technologies for treating livestock farm wastewater suffer from problems such as high dosage of chemicals, high treatment costs, large amounts of sludge, large wastewater production, and substandard quality of recycled water. In particular, photocatalytic oxidation has low efficiency and is difficult to effectively remove COD, ammonia nitrogen, total phosphorus, and pathogens.
The wastewater treatment system, which combines silicon carbide membrane reactors with photocatalytic oxidation technology, achieves membrane treatment and photocatalytic oxidation through the combination of silicon carbide membrane reaction tanks, photocatalytic reaction systems, and activated carbon filters, thereby reducing microbial content and removing pollutants such as COD, ammonia nitrogen, and total phosphorus.
It achieves efficient wastewater purification, meets the standards for reclaimed water reuse or discharge, reduces equipment footprint, reduces sludge production, and ensures sterilization effect without chemical residue.
Smart Images
Figure CN224030822U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wastewater treatment equipment technical field especially relates to a wastewater treatment system. BACKGROUND
[0002] Under the restriction of land resources, wastewater treatment of breeding farm in south area mainly adopts advanced treatment technology. Wastewater advanced treatment technology mainly utilizes biochemical method and physical method to remove COD, BOD and other organic matters in water. Breeding wastewater usually adopts'solid-liquid separation-anaerobic-aerobic' biological denitrification and dephosphorization method to carry out treatment, and after treatment, the content of COD, BOD and other organic matters is reduced, but still cannot satisfy the discharge requirement, and needs further advanced treatment. However, when adopting chemical method to remove pollutants in water in current advanced treatment, there are problems such as large dosage of added reagent, high treatment cost, large sludge quantity, large wastewater production and the like. At the same time, water quality requirement for water reuse is higher, and residual pathogenic bacteria in water influence safe production.
[0003] Therefore, it is necessary to explore new mode of wastewater treatment, and form a set of advanced treatment device and method. Membrane bioreactor is a new water treatment technology combining membrane separation unit with biological treatment unit. It replaces secondary sedimentation tank with membrane assembly, thereby reducing land occupation area of wastewater treatment facility. Silicon carbide biological membrane has main advantages such as strong chemical resistance, good high-temperature stability and excellent anti-fouling performance. However, the filtration precision of the membrane is 0.1-0.4 microns, and the removal effect of colority and COD is not thorough enough, and small molecule substances such as virus can still penetrate the membrane into water.
[0004] As a new type of wastewater treatment technology, photocatalytic oxidation has advantages such as high catalytic activity, good stability, low cost, no toxicity to human body and the like. Among them, the research and application of nano-TiO2 photocatalytic oxidation technology are the most extensive. However, when using photocatalytic oxidation alone to degrade refractory substances in wastewater, the efficiency is low, and therefore a wastewater treatment system is proposed to solve the above problems. UTILITY MODEL CONTENT
[0005] In order to make up for the above shortcomings, the utility model provides a wastewater treatment system, which aims at realizing efficient treatment of wastewater.
[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:
[0007] A wastewater treatment system comprises a collecting tank, a lifting pump connected to the collecting tank through a pipeline, a suction filter connected to the lifting pump through a pipeline, a silicon carbide membrane reaction tank connected to the suction filter through a pipeline, a photocatalytic reaction system connected to the silicon carbide membrane reaction tank through a pipeline, and an activated carbon filter connected to the photocatalytic reaction system through a pipeline. Thus, after the wastewater is evenly treated in the collecting tank, the wastewater is transported to the suction filter through the lifting pump, and then the wastewater is transported to the silicon carbide membrane reaction tank through the suction filter. The wastewater is treated by the membrane in the silicon carbide membrane reaction tank, and then the water flow is treated by photocatalytic oxidation in the photocatalytic reaction system. After the water is filtered by the activated carbon filter, the water quality is purified. The system can greatly reduce the microbial content in the wastewater, effectively remove COD, ammonia nitrogen, total phosphorus, and reduce the colority, so as to achieve the standard of water reuse or discharge.
[0008] As a further description of the above technical solution:
[0009] The silicon carbide membrane reaction tank is provided with a silicon carbide biofilm reactor assembly. A sludge discharge hole is formed in the bottom of the silicon carbide membrane reaction tank. An aeration pipe is arranged at the bottom of the silicon carbide membrane reaction tank. The aeration pipe is connected to an air compressor through a pipeline. The aeration pipe releases air to disturb the wastewater at the bottom of the silicon carbide membrane reaction tank.
[0010] As a further description of the above technical solution:
[0011] The silicon carbide biofilm reactor assembly is composed of flat plate type silicon carbide biofilms connected in series in the silicon carbide membrane reaction tank.
[0012] As a further description of the above technical solution:
[0013] A rotor flow meter and a valve are connected to the water inlet pipeline from the suction filter to the silicon carbide membrane reaction tank to control the wastewater flow.
[0014] As a further description of the above technical solution:
[0015] The photocatalytic reaction system comprises a water distribution pipe, a UV reaction chamber, and a water collecting pipe. The photocatalytic reaction system is provided with multiple groups of the UV reaction chamber. The UV reaction chamber is composed of three photocatalytic reaction cavities connected in series. The photocatalytic reaction cavities are connected to the silicon carbide membrane reaction tank through the water distribution pipe. A self-suction pump is arranged on the connecting pipeline between the water distribution pipe and the silicon carbide membrane reaction tank.
[0016] As a further description of the above technical solution:
[0017] The photocatalytic reaction system is externally connected with a hydrogen peroxide adding device through a pipeline, the hydrogen peroxide adding device comprises a hydrogen peroxide adding barrel and a metering pump, the hydrogen peroxide adding barrel and the metering pump are sequentially connected, and hydrogen peroxide is transported to a water distribution pipe of the photocatalytic reaction system by the metering pump through a hydrogen peroxide adding pipeline.
[0018] As a further description of the above technical solution:
[0019] The other end of the photocatalytic reaction cavity opposite to the water distribution pipe is connected with a water collecting pipe, the other end of the water collecting pipe is connected with a water inlet of an activated carbon filter, and the activated carbon filter is provided with granular activated carbon for adsorbing and purifying the wastewater.
[0020] As a further description of the above technical solution:
[0021] The wastewater treatment system further comprises the backwashing device, the backwashing device comprises a backwashing water pump and a water storage barrel, a water inlet of the water storage barrel is in communication with a water outlet of the activated carbon filter through a water pipe, the water storage barrel further comprises a water outlet, and the water outlet is in communication with the backwashing water pump through a pipeline.
[0022] As a further description of the above technical solution:
[0023] A safety filter is arranged between the silicon carbide membrane reaction pool and the backwashing device, a water outlet end of the safety filter is in communication with the silicon carbide membrane reaction pool, and a water inlet of the safety filter is in communication with the backwashing water pump.
[0024] The utility model has the advantages of:
[0025] In the utility model, the wastewater flows through the silicon carbide membrane reaction pool and the photocatalytic reaction system, the membrane treatment is combined with the photocatalytic oxidation technology, the microbial content in water can be greatly reduced, COD, ammonia nitrogen, total phosphorus can be effectively removed, and the chroma can be reduced, so that the reclaimed water reuse or discharge standard is reached. While ensuring sterilization, the system can also perform deep photocatalytic degradation on the antibiotic drug residues in the wastewater and COD, ammonia nitrogen, total phosphorus and chroma, so that the relevant indexes of the reclaimed water reuse meet the standards on the basis of no chemical residues. In addition, the system adopts integrated equipment, can save space, greatly reduces the equipment area, and is convenient for transformation. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is a plane schematic view of a wastewater treatment system in embodiment one of the utility model;
[0027] Figure 2 It is a structure schematic view of a wastewater treatment system comprising a backwashing device in embodiment two of the utility model;
[0028] Figure 3 A structure diagram of a silicon carbide membrane reaction tank of a wastewater treatment system is provided in the utility model.
[0029] Figure 4 A structure diagram of a collecting tank of a wastewater treatment system is provided in the utility model.
[0030] Legend:
[0031] 1, collecting tank; 2, lifting pump; 3, sucking filter; 4, rotor flow meter; 5, valve; 6, silicon carbide membrane reaction tank; 61, silicon carbide bio-membrane reactor assembly; 62, air compressor; 63, sludge discharge hole; 64, aeration pipe; 7, hydrogen peroxide dosing device; 71, hydrogen peroxide dosing barrel; 72, metering pump; 8, photocatalytic reaction system; 81, water distribution pipe; 82, photocatalytic reaction cavity; 83, water collecting pipe; 9, activated carbon filter; 91, water outlet; 10, backwashing equipment; 101, backwashing water pump; 102, water storage barrel; 103, drain; 104, security filter; 11, self-priming pump. DETAILED DESCRIPTION
[0032] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0033] Embodiment one: refer to Figure 1 , Figure 3 and Figure 4The application discloses a breeding wastewater advanced treatment system, which comprises a collecting tank 1 used for collecting wastewater generated in a breeding process, a lifting pump 2 connected with the collecting tank 1 through a pipeline and used for lifting the wastewater to a subsequent treatment link of the system, a suction filter 3 connected with the lifting pump 2 through a pipeline and used for intercepting large particles and suspended matters, a silicon carbide membrane reaction tank 6 connected with the suction filter 3 through a pipeline and used for performing advanced treatment on the wastewater, a silicon carbide bio-membrane reactor assembly 61 arranged in the silicon carbide membrane reaction tank 6, a sludge discharge hole 63 arranged at the bottom of the silicon carbide membrane reaction tank 6, and an aeration pipe 64 arranged at the bottom of the silicon carbide membrane reaction tank 6 and connected with an air compressor 62 through a pipeline, wherein the air compressor 62 generates air, and the air is released through the aeration pipe 64 to disturb the wastewater at the bottom of the silicon carbide membrane reaction tank 6. The silicon carbide bio-membrane reactor assembly 61 is arranged in the silicon carbide membrane reaction tank 6 in a flat plate type silicon carbide bio-membrane assembly series connection mode, and the silicon carbide bio-membrane reactor assembly 61 drives water flow to penetrate the membrane layer from outside to inside through negative pressure suction, and small particles are intercepted by the membrane layer. A rotor flowmeter 4 and a valve 5 are connected on a water inlet pipeline from the suction filter 3 to the silicon carbide membrane reaction tank 6 so as to control the wastewater flow. A photocatalytic reaction system 8 comprises a water distribution pipe 81, a UV reaction chamber (not marked in the figure) and a water collecting pipe 83, the photocatalytic reaction system 8 is provided with a plurality of groups of the UV reaction chamber, each group of the UV reaction chamber is composed of three photocatalytic reaction cavities 82 in series connection, each photocatalytic reaction cavity 82 is 325W, the wastewater treatment capacity of each group of the UV reaction chamber is 3-5 m3 / h, the number of modules (the UV reaction chamber) can be flexibly adjusted according to actual water quality conditions and required treatment capacity, the photocatalytic reaction cavities 82 are connected with the silicon carbide membrane reaction tank 6 through the water distribution pipe 81, a self-priming pump 11 is arranged on a connecting pipeline between the water distribution pipe 81 and the silicon carbide membrane reaction tank 6, the treated water in the silicon carbide membrane reaction tank 6 can be pumped into the water distribution pipe 81 through the self-priming pump 11, and the water in the water distribution pipe 81 flows into the photocatalytic reaction cavities 82 to perform photocatalytic reaction. The photocatalytic reaction system 8 is connected with a hydrogen peroxide dosing device 7 through a pipeline outside the photocatalytic reaction system 8. The hydrogen peroxide dosing device 7 comprises a hydrogen peroxide dosing barrel 71 and a metering pump 72, the hydrogen peroxide dosing barrel 71 and the metering pump 72 are connected in sequence, the hydrogen peroxide is transported to the water distribution pipe 81 of the photocatalytic reaction system 8 through the metering pump 72. The photocatalytic reaction cavities 82 are connected with the water collecting pipe 83 at the other end (opposite to the water distribution pipe 81), the other end of the water collecting pipe 83 is connected with a water inlet of an activated carbon filter 9, and the activated carbon filter 9 is provided with granular activated carbon for adsorbing and purifying the wastewater. The water phase of the silicon carbide membrane reaction tank 6 enters the photocatalytic reaction cavities 82 of the photocatalytic reaction system 8 through the water distribution pipe 81, the hydrogen peroxide also enters the photocatalytic reaction cavities 82 of the photocatalytic reaction system 8 through the water distribution pipe 81, the tubular photocatalytic reaction cavities 82 can increase the residence time of the breeding wastewater in the reaction chamber, meanwhile, the hydrogen peroxide can generate hydroxyl radicals, and the organic pollutants can be completely decomposed under the cooperation of the UV light and the hydrogen peroxide, and the wastewater is subjected to the UV light and the hydrogen peroxide to remove the organic pollutants, and then enters the activated carbon filter 9 through the water collecting pipe 83.The activated carbon filter 9 has granular activated carbon therein for further adsorption of residual hydrogen peroxide or other substances in the water. The water treated by the activated carbon has been purified and meets the standards for water recycling or discharge, and can be used for subsequent recycling or discharged through the water outlet 91.
[0034] Embodiment Two: Refer to Figure 2 , Figure 3 and Figure 4 In addition to the structure in Embodiment One, the system further includes a backwashing device 10, which includes a backwashing water pump 101 and a water storage bucket 102. The water inlet of the water storage bucket 102 can be in communication with the water outlet 91 of the activated carbon filter 9 through a water pipe (a water pump can also be installed to transport water from the activated carbon filter 9 to the water storage bucket 102 if necessary). The water storage bucket 102 is also provided with a water outlet 103 for draining water when the water storage bucket 102 is full. The water outlet 103 of the water storage bucket 102 can be in communication with the backwashing water pump 101 through a pipe. When backwashing is needed, the water outlet 103 can be connected to the backwashing water pump 101 through a water pipe, and the water in the water storage bucket 102 can be pumped out by the backwashing water pump 101 to clean the silicon carbide membrane reaction tank 6. A safety filter 104 is provided between the silicon carbide membrane reaction tank 6 and the backwashing device 10. The water outlet of the safety filter 104 is in communication with the silicon carbide membrane reaction tank 6, and the water inlet of the safety filter 104 is in communication with the backwashing water pump 101. The water in the water storage bucket 102 flows through the backwashing water pump 101 and the safety filter 104 in sequence to clean the silicon carbide membrane reaction tank 6 (especially the silicon carbide biofilm reactor assembly 61). When the water storage bucket 102 is full, the backwashing water pump 101 can be turned off first, and then the pipe connection between the backwashing water pump 101 and the water outlet 103 can be disconnected, and the water in the water storage bucket 102 can be drained through the water outlet 103.
[0035] Specifically, the wastewater is transported from the collection tank 1 to the suction filter 3 through the lifting pump 2 after being discharged from the secondary AO biochemical tank. The suction filter 3 adopts a precision filtration technology and can effectively intercept the particles and suspended solids in the raw water larger than 80 μm, thereby ensuring the water quality of the subsequent treatment unit. After the preliminary filtration by the suction filter 3, the sewage enters the silicon carbide membrane reaction tank 6. The bottom of the silicon carbide membrane reaction tank 6 is provided with an aeration pipe 64 connected to the air compressor 62 through a pipeline. The air compressor 62 generates air which is released through the aeration pipe 64 to fully disturb the wastewater at the bottom of the silicon carbide membrane reaction tank 6, thereby promoting the oxygen mass transfer efficiency and improving the biodegradation effect. The silicon carbide biofilm reactor assembly 61 is arranged in the silicon carbide membrane reaction tank 6 in series by flat plate type silicon carbide biofilm assembly. The wastewater and the silicon carbide biofilm operate in a submerged mode. The silicon carbide biofilm reactor assembly 61 drives the water flow to penetrate the membrane layer from outside to inside through negative pressure suction. The micro-particles and other solid suspensions are intercepted by the membrane layer. In this process, the micro-particles and other solid suspensions are settled and deposited at the bottom of the silicon carbide membrane reaction tank 6. The sludge at the bottom of the membrane tank is discharged through the bottom sludge discharge hole 63 and the pipeline, thereby ensuring the continuous and stable operation of the system. After the filtration of the water flow by the silicon carbide biofilm, the water is transported to the photocatalytic reaction system 8 by the self-priming pump 11 (the treated water in the silicon carbide membrane reaction tank 6 can be pumped into the water distribution pipe 81 by the self-priming pump 11, and the water in the water distribution pipe 81 flows into the photocatalytic reaction cavity 82 for photocatalytic reaction). The photocatalytic reaction cavity 82 of the photocatalytic reaction system 8 is provided with an ultraviolet lamp tube. The inner wall of the photocatalytic reaction cavity 82 is coated with a special light nano-TiO2 coating, which can effectively enhance the photocatalytic effect. The oxidant hydrogen peroxide can be added to the photocatalytic reaction cavity 82 of the photocatalytic reaction system 8 through the hydrogen peroxide dosing device 7 and the pipeline access. The hydroxyl radicals generated by the decomposition of the hydrogen peroxide can oxidize the organic matter in the water, thereby further purifying the water. The ultraviolet light has a dual wavelength of 185 nanometers and 253.7 nanometers, and the concentration of the hydrogen peroxide is 8%. The optimization of these parameters ensures the efficient photocatalytic reaction. The water flow flows out of the photocatalytic reaction system 8 and then flows through the activated carbon filter 9. The activated carbon filter 9 contains granular activated carbon which can be used to quench the residual hydrogen peroxide after the photocatalytic oxidation process, remove the hydroxyl radicals and other substances remaining after the photocatalytic process, and further purify the water flow, so that the water flow meets the standards for water reuse or discharge. The water treated by the activated carbon filter 9 can be directly discharged or recycled through the water outlet 91. The water flow not only improves the water quality but also prolongs the service life of the subsequent treatment equipment after flowing through the activated carbon filter 9.
[0036] The purified water can also be recycled and used, such as cleaning the silicon carbide membrane reaction tank 6. Specifically, the water filtered by the activated carbon filter 9 can be transported to the water storage bucket 102 through a water pipe. The drain 103 of the water storage bucket 102 can be connected to the backwashing water pump 101 through a pipe, and the water flow can pass through the backwashing water pump 101 and the security filter 104 in turn to backwash the silicon carbide membrane reaction tank 6 (especially the silicon carbide biofilm reactor assembly 61). That is, using the reverse fluid power, the pollutants accumulated in the silicon carbide biofilm filtration process are removed, and the impurities trapped on the membrane surface are removed from the membrane surface. And also can add dilute hydrochloric acid in the silicon carbide membrane reaction tank 6, using the backwashing water flow to carry out deep cleaning of the silicon carbide biofilm reactor assembly 61. The backwashing period is 30 min, and each time the washing time is 30 s, the whole process is operated at normal temperature and pressure. Then rinse with clean water to restore the performance of the membrane and ensure the long-term stable operation of the system.
[0037] Taking the wastewater treatment in the farm as an example, the treatment method is as follows:
[0038] Step one, after the breeding wastewater is discharged from the secondary A0 biochemical tank, it is transported from the collection tank 1 to the suction filter 3 through the lifting pump 2. The filter intercepts particles and suspended solids greater than 80 μm in the raw water.
[0039] Step two, after the wastewater is intercepted and filtered by the suction filter 3, it enters the silicon carbide membrane reaction tank 6. The bottom of the silicon carbide membrane reaction tank 6 is provided with an aeration pipe 64, and the aeration pipe 64 is connected to an air compressor 62 through a pipe. The air compressor 62 generates air, which is released through the aeration pipe 64 to disturb the wastewater at the bottom of the silicon carbide membrane reaction tank 6. The wastewater and the silicon carbide biofilm in the silicon carbide biofilm reactor assembly 61 operate in a submerged mode. The silicon carbide biofilm reactor assembly 61 drives the water flow to penetrate the membrane layer from the outside to the inside by negative pressure suction. The micro-particles and other solid suspensions are intercepted by the membrane layer. After the micro-particles and other solid suspensions are settled, they are deposited at the bottom of the silicon carbide biofilm reaction tank. The sludge at the bottom of the membrane tank is discharged through the bottom sludge discharge hole 63 and the pipe.
[0040] Step three, the water flows through the silicon carbide biofilm filter, and is delivered to the photocatalytic reaction system 8 by the self-priming pump 11 (the treated water in the silicon carbide membrane reaction tank 6 can be pumped into the water distribution pipe 81 by the self-priming pump 11, and the water in the water distribution pipe 81 flows into the photocatalytic reaction cavity 82 for photocatalytic reaction). The photocatalytic reaction cavity 82 of the photocatalytic reaction system 8 is provided with an ultraviolet lamp tube, and the inner wall of the photocatalytic reaction cavity 82 is coated with a special light nano TiO2 coating. The photocatalytic reaction cavity 82 of the photocatalytic reaction system 8 can also add the oxidant hydrogen peroxide through the hydrogen peroxide dosing device 7 and the pipeline access, and the hydroxyl generated by the decomposition of the hydrogen peroxide can oxidize the organic matter and other substances in the water, thereby further purifying the water. The ultraviolet light has a dual-wavelength of 185 nanometers and 253.7 nanometers, and the concentration of the hydrogen peroxide is 8%.
[0041] Step four, the water flows out of the photocatalytic reaction system 8, and then flows through the activated carbon filter 9. The activated carbon filter 9 contains granular activated carbon, which can be used to quench the residual hydrogen peroxide after the photocatalytic oxidation process, remove the hydroxyl and other substances remaining after photocatalysis, purify the water flow, and make the water flow meet the reclaimed water reuse standard. The water treated by the activated carbon filter 9 can be directly discharged through the water outlet 91 or recycled.
[0042] Step five, the purified water can also be recycled and used, for example, to clean the silicon carbide membrane reaction tank 6. Specifically, the water filtered by the activated carbon filter 9 can be delivered to the water storage barrel 102 through a water pipe. The drain 103 of the water storage barrel 102 can be connected to the backwashing water pump 101 through a pipeline, and the water flow sequentially passes through the backwashing water pump 101 and the safety filter 104 to backwash the silicon carbide membrane reaction tank 6 (especially the silicon carbide biofilm reactor assembly 61). That is, the pollutants accumulated in the silicon carbide biofilm filtration process are removed by using the reverse fluid power, so that the impurities trapped on the membrane surface fall off from the membrane surface. In addition, dilute hydrochloric acid can be added to the backwashing water to deeply clean the silicon carbide membrane reaction tank 6 (especially the silicon carbide biofilm reactor assembly 61). The backwashing period is 30 minutes, and the flushing time is 30 seconds each time. The whole process is operated at normal temperature and pressure. Then, the membrane performance is restored by rinsing with clean water.
[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A wastewater treatment system comprising a collection tank (1), characterized in that: The collecting pool (1) is connected with a lifting pump (2) through a pipeline, the lifting pump (2) is connected with a suction filter (3) through a pipeline, the suction filter (3) is connected with a silicon carbide membrane reaction pool (6) through a pipeline, the silicon carbide membrane reaction pool (6) is connected with a photocatalytic reaction system (8) through a pipeline, and the photocatalytic reaction system (8) is connected with an activated carbon filter (9) through a pipeline.
2. A wastewater treatment system according to claim 1, characterised in that: The silicon carbide membrane reaction pool (6) is provided with a silicon carbide bio-membrane reactor assembly (61), a mud discharge hole (63) is formed in the bottom of the silicon carbide membrane reaction pool (6), and an aeration pipe (64) is arranged at the bottom of the silicon carbide membrane reaction pool (6); the aeration pipe (64) is connected with an air compressor (62) through a pipeline, and the aeration pipe (64) releases air to disturb the wastewater at the bottom of the silicon carbide membrane reaction pool (6).
3. A wastewater treatment system according to claim 2, wherein: The silicon carbide bio-membrane reactor assembly (61) is a flat plate type silicon carbide bio-membrane arranged in series in the silicon carbide membrane reaction pool (6).
4. The wastewater treatment system of claim 2, wherein: A rotor flowmeter (4) and a valve (5) are connected to the water inlet pipeline of the suction filter (3) to the silicon carbide membrane reaction pool (6) to control the wastewater flow.
5. The wastewater treatment system of claim 2, wherein: The photocatalytic reaction system (8) comprises a water distribution pipe (81), a UV reaction chamber and a water collecting pipe (83), the photocatalytic reaction system (8) is provided with a plurality of groups of the UV reaction chamber, the UV reaction chamber is composed of three photocatalytic reaction cavities (82) arranged in series, the photocatalytic reaction cavities (82) are connected with the silicon carbide membrane reaction pool (6) through the water distribution pipe (81), and a self-suction pump (11) is arranged on the connecting pipeline between the water distribution pipe (81) and the silicon carbide membrane reaction pool (6).
6. A wastewater treatment system as claimed in claim 5, wherein: The photocatalytic reaction system (8) is connected with a hydrogen peroxide dosing device (7) through a pipeline outside the photocatalytic reaction system (8), the hydrogen peroxide dosing device (7) comprises a hydrogen peroxide dosing barrel (71) and a metering pump (72), the hydrogen peroxide dosing barrel (71) and the metering pump (72) are connected in sequence, and the hydrogen peroxide is transported to the water distribution pipe (81) of the photocatalytic reaction system (8) through the metering pump (72) by a hydrogen peroxide dosing pipeline.
7. A wastewater treatment system according to claim 5, wherein: A water collecting pipe (83) is connected to the other end of the photocatalytic reaction cavity (82) opposite to the water distribution pipe (81), the other end of the water collecting pipe (83) is connected with a water inlet of an activated carbon filter (9), and granular activated carbon in the activated carbon filter (9) adsorbs and purifies the wastewater.
8. A wastewater treatment system according to claim 7, characterised in that: The wastewater treatment system further comprises a backwashing device (10), the backwashing device (10) comprises a backwashing water pump (101) and a water storage barrel (102), a water inlet of the water storage barrel (102) is connected with a water outlet (91) of the activated carbon filter (9) through a water pipeline, and the water storage barrel (102) further comprises a drain (103) connected with the backwashing water pump (101) through a pipeline.
9. A wastewater treatment system according to claim 8, wherein: The security filter (104) is arranged between the silicon carbide membrane reactor tank (6) and the backwashing device (10), the water outlet of the security filter (104) is communicated with the silicon carbide membrane reactor tank (6), and the water inlet of the security filter (104) is communicated with the backwashing water pump (101).