Series-connected multi-stage MABR reaction intelligent water treatment system

Abstract

The invention relates to the technical field of sewage treatment, in particular to a series multi-stage MABR reaction intelligent water treatment system. Comprising a multi-stage membrane aeration biological membrane reaction unit and a data monitoring and feedback unit, the multi-stage membrane aeration biological membrane reaction unit comprises an MABR (Membrane Aerated Baffled Reactor) membrane assembly, a magnet rod, a pipeline, a valve, a gas pipe clamp, a water storage barrel, a bidirectional delivery pump, a membrane aeration aerobic biological membrane reactor unit, a membrane aeration micro-aerobic biological membrane reactor unit and a membrane aeration anaerobic biological membrane reactor unit. According to the serial multi-stage MABR reaction intelligent water treatment system provided by the invention, through the multi-stage membrane aeration biological membrane reaction unit and the data monitoring and feedback unit, through real-time monitoring and feedback, various composite pollutants such as persistent organic pollutants (POPs) and the like can be efficiently removed, such as pesticides, nitrogen elements and the like in a water body; and energy conservation and carbon reduction can be facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a series-connected multi-stage MABR reaction intelligent water treatment system. Background Art

[0002] Principle of MABR membrane technology: MABR is a wastewater treatment technology that combines biofilm with aeration membrane materials. The core of its reactor is the membrane assembly and biofilm. The biofilm grows on the outside of the membrane material, and oxygen is transferred from the inside of the membrane to the outside of the membrane to supply oxygen to the biofilm. The oxygen pressure remains lower than the bubble point pressure of the membrane assembly, so this oxygen supply method is also called bubbleless aeration. Driven by the pressure difference, the oxygen in the membrane assembly continuously enters the biofilm. At the same time, the biofilm is in full contact with the pollutants in the water. The pollutants enter the biofilm due to the concentration difference and the absorption of the biofilm.

[0003] Persistent organic pollutants (POPs) are a type of environmental pollutants that have received widespread attention. They pose a potential threat to the global environment due to their high toxicity, high bioaccumulation, long residual period in the environment, and ability to migrate over long distances around the world. Biodegradation is an important migration and transformation pathway for POPs after they enter the environment. The study of POPs biodegradability is of great significance for evaluating their environmental fate, ecological risks, and selecting suitable remediation technologies. However, the existing water treatment systems have room for improvement in terms of low energy consumption, low material consumption, low cost, high efficiency, removal of POPs in water, and resource recycling without secondary pollution.

[0004] In view of the technical bottlenecks of traditional MABR technology, (1) single-stage reactors are difficult to adapt to the gradient degradation requirements of complex pollutant systems, especially for POPs pollutants with biological inhibition; (2) aeration energy consumption accounts for 60-70% of the total energy consumption of the system, and the oxygen utilization rate of traditional bubble aeration is less than 40%; (3) biofilm functional bacterial community regulation lacks a dynamic response mechanism, making it difficult to maintain the stability of short-range nitrification-anaerobic ammonia oxidation and other fine reactions. To this end, a multi-stage MABR reaction intelligent water treatment system in series is designed to provide another technical solution to the above technical problems. Summary of the invention

[0005] Based on this, it is necessary to provide a series-connected multi-stage MABR reaction intelligent water treatment system to address the above-mentioned technical problems, which can be used to solve the technical problems in the existing water treatment systems in terms of low energy consumption, low material consumption, low cost, high efficiency of treatment effects, removal of POPs in water, and resource recycling without secondary pollution.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A multi-stage MABR reaction intelligent water treatment system connected in series, comprising a multi-stage membrane aeration biofilm reaction unit and a data monitoring and feedback unit;

[0008] The multi-stage membrane aeration biofilm reaction unit comprises a MABR membrane assembly, a magnet bar, a pipeline, a valve, a trachea clamp, a water storage tank, a two-way delivery pump, a membrane aeration aerobic biofilm reactor unit, a membrane aeration microaerobic biofilm reactor unit and a membrane aeration anaerobic biofilm reactor unit.

[0009] As a preferred embodiment of the series-connected multi-stage MABR reaction intelligent water treatment system provided by the present invention, the data monitoring and feedback unit includes a peristaltic pump, a pipeline, a treated water storage tank, a temperature sensor, a DO sensor, a PH sensor and a data display.

[0010] As a preferred embodiment of the series-connected multi-stage MABR reaction intelligent water treatment system provided by the present invention, the membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit, and the membrane aeration anaerobic biofilm reactor unit are spatially separated from each other and connected in series.

[0011] As a preferred embodiment of the multi-stage MABR reaction intelligent water treatment system in series provided by the present invention, the treated water flows into the membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit, the membrane aeration anaerobic biofilm reactor unit and the water storage tank in any combination;

[0012] The aeration sequence remains unchanged from the membrane aeration aerobic biofilm reactor unit to the membrane aeration microaerobic biofilm reactor unit and then to the membrane aeration anaerobic biofilm reactor unit.

[0013] As a preferred embodiment of the multi-stage MABR reaction intelligent water treatment system in series provided by the present invention, the membrane aeration anaerobic biofilm reactor unit is used as the first-stage reaction unit, and the output water flow is the first treated water flow;

[0014] The membrane aeration micro-aerobic biofilm reactor unit serves as a second-stage reaction unit, and the output water flow is the second treated water flow;

[0015] The membrane aeration aerobic biofilm reactor unit is used as a third-stage reaction unit, and the output water flow is the third treated water flow;

[0016] The POPs content of the water stream treated by the membrane aeration aerobic biofilm reactor unit is lower than that of the membrane aeration microaerobic biofilm reactor unit, and the membrane aeration anaerobic biofilm reactor unit inputs a first treated water stream to the membrane aeration microaerobic biofilm reactor unit;

[0017] The POPs content of the water flow treated by the membrane aeration microaerobic biofilm reactor unit is lower than that of the membrane aeration aerobic biofilm reactor unit, and the membrane aeration microaerobic biofilm reactor unit inputs a second treated water flow to the membrane aeration aerobic biofilm reactor unit.

[0018] As a preferred embodiment of the series-connected multi-stage MABR reaction intelligent water treatment system provided by the present invention, the membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit, and the membrane aeration anaerobic biofilm reactor unit all include hollow fiber membranes.

[0019] As a preferred embodiment of the series-connected multi-stage MABR reaction intelligent water treatment system provided by the present invention, the membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit, and the membrane aeration anaerobic biofilm reactor unit include magnet bars.

[0020] As a preferred embodiment of the series-connected multi-stage MABR reaction intelligent water treatment system provided by the present invention, the membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit, and the membrane aeration anaerobic biofilm reactor unit include magnetic nano-iron.

[0021] As a preferred embodiment of the series-connected multi-stage MABR reaction intelligent water treatment system provided by the present invention, both the membrane aeration anaerobic biofilm reactor unit and the membrane aeration microaerobic biofilm reactor unit contain polymer gel fillers.

[0022] As a preferred embodiment of the series-connected multi-stage MABR reaction intelligent water treatment system provided by the present invention, the membrane aeration aerobic biofilm reactor unit, the micro-oxygen biofilm reaction unit and the membrane aeration anaerobic biofilm reactor unit all include a liquid outlet valve.

[0023] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0024] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects:

[0025] 1. The present invention provides a series-connected multi-stage MABR reaction intelligent water treatment system, which can achieve efficient removal of various complex pollutants such as persistent organic pollutants (POPs), such as pesticides and nitrogen elements in water bodies, through real-time monitoring and feedback through multi-stage membrane aeration biofilm reaction units and data monitoring and feedback units, thereby being beneficial to energy conservation and carbon reduction.

[0026] 2. The multi-stage MABR reaction intelligent water treatment system of the present invention has a three-level gradient oxygen environment coupling system. By constructing an "anaerobic-microaerobic-aerobic" reaction unit series system, combined with magnetically controlled functional materials and intelligent feedback mechanism, the step-by-step directional degradation of POPs is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 Schematic diagram of the structure of the water treatment system of the present invention.

[0029] In the figure: 1. feed barrel; 2. feed peristaltic pump; 3. feed valve; 4. water inlet; 5. aerator; 6. air inlet rotor flowmeter; 7. air inlet pressure gauge; 8. air inlet; 9. hollow fiber membrane assembly; 10. ferromagnetic rod and magnetic nano-iron assembly; 11. polymer gel filler; 12. cover; 13. valve; 14. two-way delivery pump; 15. air outlet; 16. air pipe clamp; 17. water outlet; 18. water stop valve; 19. temperature sensor; 20. DO sensor; 21. pH sensor; 22. data display; 23. reflux pump; 24. membrane aeration anaerobic biofilm reactor unit; 25. membrane aeration microaerobic biofilm reactor unit; 26. membrane aeration aerobic biofilm reactor unit; 27. water storage barrel; 28. reflux pump; 29. ​​sample barrel; 30. medicine bottle. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] Reference Figure 1 , a multi-stage MABR reaction intelligent water treatment system connected in series, specifically taking the removal of nitrogen and organophosphorus pesticide pollutants in water as an example.

[0035] The multi-stage MABR reaction intelligent water treatment system has a three-level gradient oxygen environment coupling system. By constructing an "anaerobic-microaerobic-aerobic" reaction unit series system, combined with magnetically controlled functional materials and intelligent feedback mechanisms, it achieves step-by-step directional degradation of POPs.

[0036] Figure 1 In the middle, the dark color (black) is the air path, and the light color (blue) is the water path.

[0037] It includes a multi-stage membrane aeration biofilm reaction unit and a data monitoring and feedback unit;

[0038] Preferably, the multi-stage membrane aeration biofilm reaction unit has a "longitudinal grading + transverse coupling" reactor configuration, and a cross-unit material circulation channel is established through a bidirectional delivery pump 14;

[0039] The multi-stage membrane aeration biofilm reaction unit comprises a MABR membrane assembly, a magnet bar, a pipeline, a valve 13, an air pipe clamp 16, a water storage tank 27, a two-way delivery pump 14, a membrane aeration aerobic biofilm reactor unit 26, a membrane aeration microaerobic biofilm reactor unit 25 and a membrane aeration anaerobic biofilm reactor unit 24;

[0040] In this embodiment, a water outlet 17 is provided at one end of the top of the membrane aeration anaerobic biofilm reactor unit 24 close to the membrane aeration microaerobic biofilm reactor unit 25, and the water outlet 17 intelligently intercepts pollutants through multi-spectral sensing. A water stop valve 18 is provided at one end of the bottom of the membrane aeration anaerobic biofilm reactor unit 24 away from the membrane aeration microaerobic biofilm reactor unit 25, and the water stop valve 18 adopts a pressure difference-turbidity dual-mode locking to achieve anti-impact protection.

[0041] In this embodiment, a polymer gel filler 11 is disposed inside the membrane aeration micro-aerobic biofilm reactor unit 25 , and a cover 12 is disposed on the top of the membrane aeration micro-aerobic biofilm reactor unit 25 .

[0042] The data monitoring and feedback unit comprises a feed peristaltic pump 2, a pipeline, a treated water storage tank, a temperature sensor 19, a DO sensor 20, a PH sensor 21 and a data display 22, so that the temperature, DO and PH in the treated water can be automatically collected, and feedback control is performed to perform collection or reflux operations;

[0043] In this embodiment, the temperature sensor 19, DO sensor 20, and pH sensor 21 are all located on the inner side of the sampling barrel 29, so that the sampling barrel 29 is equipped with a micro mass spectrometer module to complete in-situ high-sensitivity detection of POPs degradation products. The input end of the sampling barrel 29 is connected to a reflux pump 28.

[0044] In this embodiment, the output end of the sample barrel 29 is connected to the reflux pump 23, so that the reflux pump 23 can dynamically optimize the reflux ratio based on AI to improve the denitrification efficiency, and the output end of the reflux pump 23 is in contact with the medicine bottle 30.

[0045] In this embodiment, a feed valve 3 is provided between the feed peristaltic pump 2 and the membrane aeration anaerobic biofilm reactor unit 24, and a water inlet 4 is provided on the top of the membrane aeration anaerobic biofilm reactor unit 24. The water inlet 4 optimizes the water ratio through magnetization pretreatment and dynamic diversion.

[0046] The spatial positions of the membrane aeration aerobic biofilm reactor unit 26, the membrane aeration microaerobic biofilm reactor unit 25, and the membrane aeration anaerobic biofilm reactor unit 24 are separated from each other and connected in series, which can be adjusted as needed. At the same time, the water flow in the liquid inlet pipeline received by the membrane aeration anaerobic membrane bioreactor unit can be any water flow that needs to reduce the microbial content and is suitable for the membrane aeration anaerobic membrane bioreactor unit to treat, such as agricultural sewage, urban domestic sewage and other sewage. The order in which the treated water flows into the membrane aeration aerobic biofilm reactor unit 26, the membrane aeration microaerobic biofilm reactor unit 25, the membrane aeration anaerobic biofilm reactor unit 24 and the water storage tank 27 can be arbitrarily combined. The aeration order remains unchanged in the order of the membrane aeration aerobic biofilm reactor unit 26 to the membrane aeration microaerobic biofilm reactor unit 25 and then to the membrane aeration anaerobic biofilm reactor unit 24.

[0047] In the embodiment of the present invention, the first treated water flow output by the membrane aeration anaerobic biofilm reactor unit 24 is conducive to providing a stable environment for the membrane aeration micro-aerobic biofilm reactor unit 25. The first treated water flow output by the membrane aeration aerobic biofilm reactor unit 26 has a low organic matter concentration, which can help reduce the competition of heterotrophic bacteria on anaerobic ammonia-oxidizing bacteria. The first treated water flow output by the membrane aeration anaerobic biofilm reactor unit 24 has a low dissolved oxygen concentration, which can more easily achieve an anoxic environment for the liquid phase body. At the same time, the temperature of the membrane aeration micro-aerobic biofilm reactor unit 25 is controlled at 30-35°C and pH=8, which is conducive to accelerating the proliferation rate of nitrite bacteria and inhibiting the proliferation of nitrate bacteria, which is conducive to inhibiting NO 2 - -N to NO 3 - -N oxidation process, thus accumulating a large amount of NO 2 - -N. Contributes to the anaerobic ammonium oxidation reaction in the membrane aeration microaerobic membrane bioreactor unit.

[0048] In the embodiment of the present invention, the membrane aerated aerobic biofilm reactor unit 26, the membrane aerated microaerobic biofilm reactor unit 25, and the membrane aerated anaerobic biofilm reactor unit 24 all use bubble-free aeration, which can have a higher oxygen transfer rate and oxygen transfer efficiency compared to the technology using bubble aeration, and can help greatly reduce the energy consumption and material consumption of the water treatment system.

[0049] The biofilm of the membrane aerated micro-aerobic biofilm reactor unit 25 is a heterogeneous mass transfer system. Oxygen is transferred from the aeration membrane of the membrane aerated micro-aerobic biofilm reactor unit 25 to the liquid phase of the second input water flow (i.e., the first treated water flow), and can be directly used by the biofilm attached to the aeration membrane. A short-range nitrification reaction can occur on the aerobic biofilm near the surface of the aeration membrane, that is, the ammonia nitrogen in the first treated water flow is oxidized to nitrite nitrogen by oxygen under the action of nitrite bacteria on the biofilm, thereby accumulating a large amount of NO 2 - -N.

[0050] The pH of the membrane aeration micro-aerobic biofilm reactor unit 25 is maintained stable, and the pH sensor monitors the pH online in real time. Then, the feeding peristaltic pump 2 with a wireless signal receiving function is adjusted through a wireless signal to deliver the pH-adjusting medicine into the membrane aeration micro-aerobic biofilm reactor unit 25, thereby controlling the pH in the second treated water flow to be maintained at about pH=8, which is conducive to the reproduction of nitrite bacteria, and then controlling the ratio of ammonia nitrogen to nitrite nitrogen in the first treated water flow, for example, to a level that is conducive to anaerobic ammonia oxidation reaction. Optionally, the ratio of ammonia nitrogen to nitrite nitrogen in the first treated water flow is conducive to micro-aerobic ammonia oxidation reaction. Through the water storage tank 27, the second treated water flow is circulated and re-entered into the membrane aeration anaerobic biofilm reactor unit 24, thereby achieving the stability of the pH of the membrane aeration aerobic biofilm reactor unit 26.

[0051] In the embodiment of the present invention, the membrane aerated biofilm reactor unit may include any suitable membrane aerated biofilm reactor body and corresponding supporting materials, devices, equipment, systems, etc. such as an air supply system, a water inlet system, and a circulation system.

[0052] The membrane aeration biofilm reactor unit includes a hollow fiber membrane assembly 9, specifically, the membrane aeration aerobic biofilm reactor unit 26, the micro-oxygen biofilm reaction unit and the membrane aeration anaerobic biofilm reactor unit 24 all include hollow fiber membranes. There are multiple hollow fiber membranes, which can form one or more membrane assemblies. The hollow fiber membrane is wound on the magnet rod in a spiral form, which can save space while increasing the microbial attachment area, thereby improving the removal efficiency of complex pollutants such as POPs.

[0053] Into the membrane aerated anaerobic biofilm reactor unit 24, raw sewage and phosphorus-containing sludge returned from the water storage tank 27 flow in synchronously. The main function of the membrane aerated anaerobic biofilm reactor unit 24 is to release phosphorus, thereby increasing the concentration of P in the sewage. The soluble organic matter is absorbed by the microbial cells, thereby reducing the BOD concentration in the sewage. In addition, part of NH3-N is removed due to the synthesis of the cells, thereby reducing the NH3-N concentration in the sewage, but the NO3-N content does not change.

[0054] The biofilm in the membrane aeration micro-oxygen biofilm reactor unit 25 can be a heterogeneous mass transfer system, and oxygen is transferred from the aeration membrane in the membrane aeration micro-oxygen biofilm reactor unit 25 to the liquid phase direction, and is directly used by the biofilm attached to the aeration membrane, which can help to achieve the stratification from the micro-oxygen zone on the membrane surface to the anoxic zone of the liquid phase, and provide a suitable environment for different reaction stages. Short-range nitrification reaction can occur on the micro-oxygen biofilm near the membrane surface. That is, the ammonia nitrogen in the first treated water flow is oxidized to nitrite nitrogen by oxygen under the action of ammonia oxidizing bacteria on the biofilm, and the second treated water flow is obtained. Examples of short-range nitrification reaction formulas include: the main body of the liquid phase of the second treated water flow includes an anoxic zone, has a higher substrate concentration and a lower dissolved oxygen concentration, which is conducive to the occurrence of micro-oxygen ammonia oxidation reaction. For example, under the action of micro-oxygen ammonia oxidizing bacteria on the biofilm in the main body of the liquid phase, the nitrite nitrogen in the main body of the liquid phase can be used as an electron acceptor, and the ammonia nitrogen can be used as an electron donor, and a micro-oxygen ammonia oxidation reaction occurs, producing nitrogen gas to denitrify while producing a small amount of nitrate nitrogen. Examples of reaction equations for microammonia oxidation reactions include:

[0055] The membrane aeration anaerobic biofilm reactor unit 24 and the membrane aeration microaerobic biofilm reactor unit 25 include a polymer gel filler 11. The polymer gel filler 11 has strong hydrophilicity and high affinity for anaerobic ammonium oxidizing bacteria, and is easy to attach to the anaerobic ammonium oxidizing biofilm, which can help provide a stable anoxic environment and sufficient space for the anaerobic ammonium oxidizing reaction, while the change of phosphorus is very small.

[0056] In the membrane aerated aerobic biofilm reactor unit 26, organic matter is biochemically degraded by microorganisms and continues to decrease; organic nitrogen is ammonified and then nitrified, which significantly reduces the concentration of NH3-N. However, as the nitrification process increases the concentration of NO3-N, P also decreases at a faster rate due to the excessive uptake of polyphosphate bacteria. Therefore, this process can simultaneously complete the functions of removing organic matter, nitrification and denitrification, and removing excessive phosphorus intake. The membrane aerated anaerobic biofilm reactor unit 24 and the membrane aerated aerobic biofilm reactor unit 26 jointly complete the phosphorus removal function. Microorganisms that can accumulate phosphorus in the activated sludge of the membrane aerated aerobic biofilm reactor unit 26 can absorb a large amount of soluble phosphorus, convert it into insoluble polyorthophosphates and store it in the body, and finally discharge the remaining sludge through the water storage tank 27 to achieve the purpose of system phosphorus removal.

[0057] The membrane aeration anaerobic biofilm reactor unit 24, the membrane aeration microaerobic biofilm reactor unit 25 and the membrane aeration aerobic biofilm reactor unit 26 may include corresponding supporting materials, devices, equipment, systems, etc. as required.

[0058] The membrane aeration anaerobic biofilm reactor unit 24, the membrane aeration aerobic biofilm reactor unit 26 and the membrane aeration microaerobic biofilm reactor unit 25 all include a magnet bar and a magnetic nano iron 10. The magnetic nano iron has a high affinity for the pesticides in the water, and is easy to adsorb the pesticide components such as glyphosate, terbuthylazine (herbicide), and the magnetic nano iron has a selective adsorption property and has no effect on microorganisms. While not occupying space, the effect of adsorbing pesticides is achieved. The magnetic nano iron can remove the attachments on the surface by heating, and the magnet bar plays an adsorption, fixing and recovery effect on the magnetic nano iron to achieve recycling.

[0059] As can be seen from the above, the short-range nitrification reaction consumes ammonia nitrogen, while the anaerobic ammonium oxidation reaction consumes ammonia nitrogen and nitrite nitrogen. The multi-stage MABR reaction intelligent water treatment system can significantly reduce the total nitrogen concentration in the water to be treated. Polyphosphate bacteria take in phosphorus. Optionally, the total nitrogen concentration of the third treated water flow is lower than that of the water to be treated. The organic phosphorus concentration of the third treated water flow is lower than that of the water to be treated.

[0060] As can be seen from the above, both the short-range nitrification reaction and the micro-ammonia oxidation reaction consume ammonia nitrogen. Polyphosphate bacteria absorb a large amount of dissolved phosphorus, and the multi-stage MABR reaction intelligent water treatment system can significantly reduce the ammonia nitrogen concentration and organic phosphorus concentration in the treated water.

[0061] Preferably, the membrane aeration anaerobic membrane bioreactor unit may include any suitable membrane aeration aerobic membrane bioreactor and corresponding supporting materials, devices, equipment, systems, etc.

[0062] Preferably, the membrane aeration anaerobic membrane bioreactor unit may include any suitable membrane aeration micro-aerobic membrane bioreactor and corresponding supporting materials, devices, equipment, systems, etc.

[0063] Preferably, the membrane aeration micro-aerobic membrane bioreactor unit may include any suitable membrane aeration micro-aerobic membrane bioreactor and corresponding supporting materials, devices, equipment, systems, etc.

[0064] Preferably, the membrane aeration aerobic membrane bioreactor unit may include any suitable membrane aeration anaerobic membrane bioreactor and corresponding supporting materials, devices, equipment, systems, etc.

[0065] In this embodiment, the membrane aeration aerobic biofilm reactor unit 26 , the micro-oxygen biofilm reactor unit and the membrane aeration anaerobic biofilm reactor unit 24 all include a liquid outlet valve.

[0066] In this embodiment, the POPs concentration and other pollutant concentrations of the water flow treated by the membrane aeration anaerobic biofilm reactor unit 24 are lower than those of the water flow flowing out of the feed barrel 1; the POPs concentration and other pollutant concentrations of the water flow treated by the membrane aeration microaerobic biofilm reactor unit 25 are lower than those of the first treated water flow flowing out of the membrane aeration aerobic biofilm reactor unit 26, and the POPs concentration and other pollutant concentrations of the water flow treated by the membrane aeration aerobic biofilm reactor unit 26 are lower than those of the second treated water flow flowing out of the membrane aeration microaerobic biofilm reactor unit 25.

[0067] In this embodiment, the membrane aerated anaerobic biofilm reactor unit 24, as a first-stage reaction unit, is located in an anaerobic environment that is conducive to the reduction reaction of anaerobic microorganisms, and the output water flow is the first treated water flow; the membrane aerated microaerobic biofilm reactor unit 25, as a second-stage reaction unit, is located in a microaerobic environment that is conducive to the reduction-oxidation reaction, and the output water flow is the second treated water flow, so that the membrane aerated anaerobic biofilm reactor unit 24 inputs treated water to the membrane aerated microaerobic biofilm reactor unit 25; the membrane aerated aerobic biofilm reactor unit 26, as a third-stage reaction unit, is located in an aerobic environment that is conducive to the oxidation reaction of aerobic microorganisms, and the output water flow is the third treated water flow, so that the membrane aerated microaerobic biofilm reactor unit 25 inputs treated water to the membrane aerated aerobic biofilm reactor unit 26.

[0068] In this embodiment, the membrane aeration aerobic biofilm reactor unit 26, the membrane aeration microaerobic biofilm reactor unit 25, and the membrane aeration anaerobic biofilm reactor unit 24 are integrally arranged.

[0069] The invention also includes an aerator 5, which adopts gas pulse coupled fuzzy PID control to realize efficient bubble-free oxygen supply. One end of the aerator 5 is connected to an air intake rotor flowmeter 6, and one end of the air intake rotor flowmeter 6 is connected to an air intake pressure gauge 7. The air intake pressure gauge 7 is connected to the membrane aeration aerobic biofilm reactor unit 26 through the air inlet 8, and the membrane aeration anaerobic biofilm reactor unit 24 is connected to the membrane aeration anaerobic biofilm reactor unit 24 through the air outlet 15. Then, the air intake assembly composed of the aerator 5, the air intake rotor flowmeter 6, the air intake pressure gauge 7, the air inlet 8 and the air outlet 15 can ensure the stability of oxygen mass transfer through interlocking regulation, so as to form a low-consumption and high-efficiency POPs deep removal system.

[0070] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage MABR reaction intelligent water treatment system connected in series, characterized in that: It includes a multi-stage membrane aeration biofilm reaction unit and a data monitoring and feedback unit; The multi-stage membrane aeration biofilm reaction unit comprises a MABR membrane assembly, a magnet bar, a pipeline, a valve, a trachea clamp, a water storage tank, a two-way delivery pump, a membrane aeration aerobic biofilm reactor unit, a membrane aeration microaerobic biofilm reactor unit and a membrane aeration anaerobic biofilm reactor unit.

2. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The data monitoring and feedback unit comprises a peristaltic pump, a pipeline, a treated water storage tank, a temperature sensor, a DO sensor, a PH sensor and a data display.

3. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit, and the membrane aeration anaerobic biofilm reactor unit are spatially separated from each other and are connected in series.

4. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The order in which the treated water flows into the membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit, the membrane aeration anaerobic biofilm reactor unit and the water storage tank can be any combination; The aeration sequence remains unchanged from the membrane aeration aerobic biofilm reactor unit to the membrane aeration microaerobic biofilm reactor unit and then to the membrane aeration anaerobic biofilm reactor unit.

5. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The membrane aeration anaerobic biofilm reactor unit is used as a first-stage reaction unit, and the output water flow is a first treated water flow; The membrane aeration micro-aerobic biofilm reactor unit serves as a second-stage reaction unit, and the output water flow is the second treated water flow; The membrane aeration aerobic biofilm reactor unit is used as a third-stage reaction unit, and the output water flow is the third treated water flow; The POPs content of the water stream treated by the membrane aeration aerobic biofilm reactor unit is lower than that of the membrane aeration microaerobic biofilm reactor unit, and the membrane aeration anaerobic biofilm reactor unit inputs a first treated water stream to the membrane aeration microaerobic biofilm reactor unit; The POPs content of the water flow treated by the membrane aeration microaerobic biofilm reactor unit is lower than that of the membrane aeration aerobic biofilm reactor unit, and the membrane aeration microaerobic biofilm reactor unit inputs a second treated water flow to the membrane aeration aerobic biofilm reactor unit.

6. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit and the membrane aeration anaerobic biofilm reactor unit all include hollow fiber membranes.

7. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit and the membrane aeration anaerobic biofilm reactor unit include a magnet bar.

8. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The membrane aeration aerobic biofilm reactor unit, the membrane aeration microaerobic biofilm reactor unit and the membrane aeration anaerobic biofilm reactor unit include magnetic nano-iron.

9. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The membrane aeration anaerobic biofilm reactor unit and the membrane aeration microaerobic biofilm reactor unit both contain polymer gel fillers.

10. A multi-stage MABR reaction intelligent water treatment system in series according to claim 1, characterized in that: The membrane aeration aerobic biofilm reactor unit, the micro-oxygen biofilm reaction unit and the membrane aeration anaerobic biofilm reactor unit all include a liquid outlet valve.

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