Aeration and carbon addition collaborative optimization sewage treatment equipment

Abstract

The invention relates to the technical field of sewage treatment, and discloses aeration and carbon addition collaborative optimization sewage treatment equipment which comprises a water pool, a cover plate, a multi-source information acquisition module, a central controller and a three-point collaborative addition system and further comprises a carbon addition mechanism, the carbon addition mechanism is installed at the lower end of the cover plate, the cover plate is installed at the upper end of the water pool in a sealed mode, and the multi-source information acquisition module is connected with the central controller. A first partition plate and a second partition plate are fixedly connected in the water tank, the interior of the water tank is divided into an anaerobic tank, an anoxic tank and an aerobic tank through the first partition plate and the second partition plate, the carbon feeding mechanism is a two-dimensional translation mechanism, and a carbon source can be uniformly fed in a three-dimensional space in the anaerobic tank through a configured feeding assembly. According to the technical scheme, the carbon source feeding system can actively sense the actual demand of each biochemical functional area to dynamically distribute the carbon source dosage, and is linked with the aeration process and the like, so that the carbon source competition contradiction in the nitrogen and phosphorus removal process is solved, and the efficient and stable operation of the sewage treatment system is realized.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment device that synergistically optimizes aeration and carbon addition. Background Technology

[0002] With the increasing severity of eutrophication in water bodies, wastewater treatment plant discharge standards, especially for nitrogen (N) and phosphorus (P) removal, are becoming increasingly stringent. Biological nitrogen and phosphorus removal technologies based on activated sludge processes (such as the A² / O process) have become mainstream due to their cost-effectiveness and efficiency. This technology relies on the synergistic effects of different functional microbial communities under alternating anaerobic, anoxic, and aerobic environments. For example, polyphosphate-accumulating organisms (PAOs) release phosphorus under anaerobic conditions and over-absorb phosphorus under aerobic conditions to achieve phosphorus removal; nitrifying bacteria oxidize ammonia nitrogen to nitrate nitrogen under aerobic conditions; and denitrifying bacteria reduce nitrate nitrogen to nitrogen gas using carbon sources as electron donors under anoxic conditions to achieve nitrogen removal. However, this process involves intense competition for readily degradable carbon sources during nitrogen and phosphorus removal, leading to unstable phosphorus removal efficiency. To address this issue, conventional carbon sources such as methanol, sodium acetate, and glucose are added to the water to provide nutrients for the microbial community.

[0003] However, existing carbon source addition technologies for wastewater treatment are limited by defects such as single addition point, uneven spatial mixing, disconnection from microbial metabolic needs, and lack of synergy with key processes such as aeration. These defects result in low carbon source utilization efficiency, high operating costs, and difficulty in simultaneously and stably achieving optimal nitrogen and phosphorus removal effects.

[0004] Therefore, there is an urgent need for a new carbon source dosing system that can actively sense the actual needs of each biochemical functional zone, dynamically allocate carbon source dosage, and achieve intelligent linkage with processes such as aeration, so as to fundamentally solve the carbon source competition contradiction in the process of nitrogen and phosphorus removal and realize the efficient and stable operation of the sewage treatment system. This invention is proposed based on this urgent need. Summary of the Invention

[0005] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a wastewater treatment device that synergistically optimizes aeration and carbon dosing. This device solves the problems of existing wastewater treatment carbon source dosing technologies, which are limited by single dosing points, uneven spatial mixing, disconnection from microbial metabolic needs, and lack of synergy with key processes such as aeration. These shortcomings result in low carbon source utilization efficiency, high operating costs, and difficulty in simultaneously and stably achieving optimal nitrogen and phosphorus removal effects.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment device for synergistic optimization of aeration and carbon dosing, comprising a water tank, a cover plate, a multi-source information acquisition module, a central controller, and a three-point synergistic dosing system, and further comprising: A carbon dosing mechanism is installed at the lower end of a cover plate, which is sealed at the upper end of the pool. A first partition and a second partition are fixedly connected inside the pool, dividing the pool into an anaerobic pool, an anoxic pool, and an aerobic pool. The carbon dosing mechanism is a two-dimensional translation mechanism, which allows the carbon source to be uniformly added in the three-dimensional space inside the anaerobic pool through the configured dosing components. The carbon dosing mechanism is located in the anaerobic tank and is controlled by a multi-source information acquisition module, a central controller and a three-point coordinated dosing system to achieve precise dosing of the controlled mixture. The mixing tank consists of two units, each equipped with a mixing component. The mixing tanks allow the mixed liquid in both the internal and external return pipelines to be controlled by a three-point synergistic dosing system, which precisely adds carbon source to the returned nitrified liquid and sludge.

[0007] As a further description of the above technical solution, the carbon dosing mechanism includes a first track and a second track. The first track is fixed to the lower end of the cover plate and slidably connected to a movable seat. The movable seat is slidably connected to a groove on the first track via a slider. The lower end of the movable seat is fixedly connected to the upper end of the second track. An installation seat is slidably connected inside the second track. The installation seat is slidably connected to a guide groove on the second track via a guide block. A central shaft is fixedly connected to the second track. The dosing component is installed on the shaft wall of the central shaft. A lead screw is installed in the first track. Both ends of the lead screw are rotatably connected to the side wall of the cover plate through sealed bearings. An internally threaded tube is threaded onto the wall of the lead screw and fixed to the moving seat. A first motor is fixedly connected to the upper end of the cover plate. A chain is installed on one side of the cover plate. Two sprockets are wound around the chain. One sprocket is fixedly connected to the output shaft of the first motor, and the other sprocket is fixedly connected to one end of the lead screw. A drive assembly is installed in the second track. The drive assembly is used to drive the dispensing assembly to move and uniformly dispense carbon source into the anaerobic tank.

[0008] As a further description of the above technical solution, the dispensing component includes a fixing plate, which is fixed to the axial wall of the central axis. Two vertical pipes are symmetrically fixedly connected to the lower end of the fixing plate. Multiple nozzles are fixedly connected to the pipe walls of the two vertical pipes. The multi-source information acquisition module is equipped with a multi-parameter fusion sensor for diagnosing the optimal dosing target point in the anaerobic tank. The multi-parameter fusion sensor is installed on the same side as the nozzles.

[0009] As a further description of the above technical solution, a support plate is fixedly connected to the lower end of the central shaft, a gear ring is fixedly connected to the lower end of the support plate, an agitator is fixedly connected to the lower end of the gear ring, a second motor is fixedly connected to the upper end of the fixed plate, the output end of the second motor passes through the fixed plate and is fixedly connected to a gear, the gear meshes with the gear ring, a rotating shaft is rotatably connected to the lower end of the agitator through a sealed bearing, a horizontal plate is fixedly connected to the lower end of the rotating shaft, and the horizontal plate is fixed to the lower end of the riser.

[0010] As a further description of the above technical solution, the drive assembly includes a timing belt that passes through the mounting base and wraps around two timing pulleys. Both timing pulleys are rotatably connected to a second track via a support shaft. One side of the timing belt is fixedly connected to the side wall of the mounting base by a rivet. A third motor is fixedly connected to the second track, and the output end of the third motor is coaxially fixedly connected to the support shaft on one of the timing pulleys.

[0011] As a further description of the above technical solution, the mixing component includes a circular plate, which is fixed inside a mixing chamber. Multiple guide pipes of different diameters are fixedly connected to the upper end of the circular plate. Each guide pipe has a funnel-shaped guide portion at its upper end. A mixing channel is formed between two adjacent guide pipes. An overflow port is opened through the side wall of the circular plate. A conveying pipe is fixedly connected to one side of the mixing chamber, and a carbon source addition pipe is provided on the other side of the mixing chamber. A sealing plate is installed at the upper end of the mixing chamber, and a drain pipe is fixedly connected to the upper end of the sealing plate. A guide block is fixedly connected to the lower end of the sealing plate. The guide block is located at the upper end of the guide pipe with the smallest diameter. The lower end of the drain pipe is located at the upper end of the guide block. The side wall of the mixing tank is provided with a concave portion. The concave portion cooperates with the guide pipe with the largest diameter to form the outermost mixing channel.

[0012] As a further description of the above technical solution, the multi-source information acquisition module is equipped with a multi-parameter fusion sensor that integrates ORP, nitrate, and phosphate probes for diagnosing the optimal dosing point in the anaerobic tank. The multi-source information acquisition module is also equipped with a nitrate meter for the return pipeline, which is installed on the external return sludge pipe to monitor the concentration of nitrate nitrogen in the return flow, serving as a control signal for the sludge return dosing point. The multi-source information acquisition module is also equipped with an influent water quality instrument, which uses a conventional online flow and COD / ammonia nitrogen analyzer to provide influent load data for feedforward calculation.

[0013] As a further description of the above technical solution, the three-point coordinated dosing system includes three metering pumps and related connecting pipes and carbon source tanks. The metering pumps quantitatively deliver carbon source to the carbon dosing mechanism, the internal return pipeline, and the external return pipeline. A lift pump is installed on the internal return pipeline to return the nitrified liquid in the aerobic tank to the anoxic tank. A sludge pump is installed on the return pipeline to return the activated sludge in the secondary sedimentation tank to the anaerobic tank.

[0014] As a further description of the above technical solution, the central controller runs a multi-level carbon source allocation algorithm to process all sensor data configured by the multi-source information acquisition module and send instructions to the actuators of all systems. At the same time, it is configured with industrial Ethernet, switches, waterproof cables and power distribution cabinets to ensure stable data and power transmission.

[0015] As a further description of the above technical solution, an inlet pipe is fixedly connected to one side of the water tank, and a drain pipe is provided on the other side of the water tank. Multiple overflow pipes are fixedly connected to one side of the first partition, and an overflow port is opened on the side wall of the second partition. The heights of the inlet pipe, overflow pipe, overflow port, and drain pipe decrease sequentially. A conical bottom is provided at the bottom of the water tank, and a sewage pipe is fixedly connected to the lowest point of the conical bottom. An aeration pipe network is installed in the aerobic tank, and multiple aeration heads are installed on the aeration pipe network. Aeration is carried out by an externally configured Roots blower.

[0016] Beneficial effects Compared with the prior art, the present invention provides a wastewater treatment device that synergistically optimizes aeration and carbon addition, which has the following beneficial effects: 1. This technical solution can resolve the carbon source competition contradiction in the denitrification and phosphorus removal processes under the traditional single carbon source addition method. By implementing a priority dynamic allocation strategy, it achieves multi-point carbon source addition. While ensuring the basic needs of denitrification, it creates and maintains a strict low carbon source competition environment for anaerobic phosphorus release, thereby achieving a synchronous and stable improvement in total nitrogen and total phosphorus removal efficiency. Secondly, the precise addition of the system greatly optimizes the carbon source utilization rate. The influent point is based on the feedforward model for addition, the reflux point is based on the precise removal of nitrate nitrogen feedback, and the anaerobic point is based on multi-parameter fusion diagnosis to achieve targeted addition. This synergistic mechanism enables external carbon sources to be guided to the target biochemical reaction to the maximum extent.

[0017] 2. The carbon dosing mechanism in this technical solution uses a first motor to drive a sprocket and chain, causing a lead screw to rotate. The rotation of the lead screw drives a movable seat via an internally threaded tube. This movable seat then moves a second track, allowing the mounting base to move along the direction set by the first track. Simultaneously, a third motor drives a synchronous pulley, enabling belt drive. The mounting base can be moved along the direction set by the second track using a rivet connection. This allows the installed dosing component to move and add carbon source to the wastewater in the anaerobic tank. This achieves active searching and precise dosing of carbon source within the anaerobic tank, specifically for polyphosphate-accumulating bacteria, maximizing phosphorus release efficiency. This represents a breakthrough from area-based carbon source addition to point-based supply, solving the problem of ineffective carbon source consumption due to uneven mixing and diffusion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a wastewater treatment device that optimizes the synergistic effect of aeration and carbon addition, as proposed in this invention. Figure 2 This invention proposes a wastewater treatment equipment that synergistically optimizes aeration and carbon addition. Figure 1 Internal structure diagram; Figure 3 This is a schematic diagram of the carbon dosing mechanism in a wastewater treatment device that optimizes the synergistic effect of aeration and carbon dosing, as proposed in this invention. Figure 1 ; Figure 4 This is a schematic diagram of the carbon dosing mechanism in a wastewater treatment device that optimizes the synergistic effect of aeration and carbon dosing, as proposed in this invention. Figure 2 ; Figure 5 This is a schematic diagram of the agitator, gear ring, fixing plate, and second motor in a wastewater treatment device for synergistic optimization of aeration and carbon addition proposed in this invention. Figure 6 This is a schematic diagram of the second track, mounting base, movable base, and fixed plate in a wastewater treatment device for synergistic optimization of aeration and carbon dosing proposed in this invention. Figure 7 This is a schematic diagram of the structure of the second track and drive component in a wastewater treatment device for synergistic optimization of aeration and carbon addition proposed in this invention; Figure 8 This is a schematic diagram of the internal structure of the mixing tank in a wastewater treatment device for synergistic optimization of aeration and carbon addition proposed in this invention; Figure 9 This is a system block diagram of a wastewater treatment equipment that synergistically optimizes aeration and carbon addition, as proposed in this invention.

[0019] In the diagram: 1. Water tank; 2. Cover plate; 3. First motor; 4. Inlet pipe; 5. Drain pipe; 6. Mixing tank; 7. Conical bottom; 8. Aeration pipe; 9. First track; 10. Third motor; 11. Second motor; 12. Second track; 13. Riser; 14. Nozzle; 15. Multi-parameter fusion sensor; 16. Agitator; 17. Overflow pipe; 18. Overflow port; 19. Second baffle; 20. Aeration head; 21. 1. Roots blower; 22. Booster pump; 23. Drain pipe; 24. First partition plate; 25. Moving seat; 26. Internally threaded pipe; 27. Lead screw; 28. Sprocket; 29. ​​Chain; 30. Mounting seat; 31. Synchronous belt; 32. Gear ring; 33. Fixed plate; 34. Central shaft; 35. Gear; 36. Synchronous pulley; 37. Guide pipe; 38. Circular plate; 39. Mixing channel; 40. Guide section; 41. Guide block. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example In a typical A² / O process, the influent carbon source first passes through the anaerobic tank. Theoretically, the carbon source should be preferentially absorbed by polyphosphate-accumulating bacteria for phosphorus release. However, if the returned sludge carries nitrate nitrogen (from the nitrified liquid returned from the aerobic tank), the carbon source will be consumed by denitrifying bacteria first, resulting in a "food shortage" for polyphosphate-accumulating bacteria and insufficient phosphorus release. This leads to a sharp drop in subsequent phosphorus removal efficiency. Although existing technologies set up dosing points on the returned sludge pipeline to remove nitrate nitrogen, most of them are fixed dosages and cannot dynamically respond to changes in water quality, posing a risk of insufficient or excessive dosage. Whether the carbon source is added to the inlet pipe or a fixed point in the tank, it relies on subsequent hydraulic agitation for diffusion. This easily leads to localized excessively high or low concentrations. High concentrations can cause polyphosphate-accumulating bacteria to release excessive phosphorus or denitrifying bacteria to quickly deplete the carbon source and enter endogenous respiration. Low concentrations prevent microorganisms from effectively utilizing the carbon source. This unevenness results in low overall carbon source utilization (typically only 60%-70%). To ensure effluent meets standards, excessive addition is often necessary, increasing operating costs and increasing the risk of COD exceeding the standard.

[0022] This invention addresses the core contradiction of carbon source competition and inefficient utilization in wastewater nitrogen and phosphorus removal. It innovatively constructs a three-tiered carbon source delivery network centrally controlled by an intelligent controller. This network coordinates carbon source delivery at three key points: a basic support point at the influent end to ensure basic nitrogen removal needs based on influent load; an environmental protection point on the sludge return pipe specifically for removing returned nitrate nitrogen, creating pure anaerobic conditions for phosphorus removal; and a movable, targeted delivery point deployed within the anaerobic tank as the core unit for carbon source delivery. These three delivery points can be dynamically linked through intelligent algorithms, transforming carbon source delivery from a "crude supply" to an "on-demand delivery" approach, forming an integrated closed loop of "perception-decision-execution." This ensures the most efficient utilization of carbon sources and systematically resolves the problems associated with carbon source allocation. See attached document Figure 1-8 The technical solution to achieve the above technical objectives includes a water tank 1, a cover plate 2, a multi-source information acquisition module, a central controller, and a three-point coordinated dosing system; A first partition 24 and a second partition 19 are fixedly connected inside the water tank 1, dividing the interior of the water tank 1 into an anaerobic tank, an anoxic tank, and an aerobic tank. An inlet pipe 4 is fixedly connected to one side of the water tank 1, and a drain pipe 23 is installed on the other side. Multiple overflow pipes 17 are fixedly connected to one side of the first partition 24, and an overflow port 18 is opened on the side wall of the second partition 19. The heights of the inlet pipe 4, overflow pipes 17, overflow port 18, and drain pipe 23 decrease sequentially, which... The water in the water tank 1 can flow naturally under the action of the height difference, passing through multiple functional areas in the water tank 1 in sequence. The bottom of the water tank 1 is provided with a cone bottom 7, and a sewage pipe 5 is fixedly connected at the lowest point of the cone bottom 7. An aeration pipe network 8 is installed in the aerobic tank, and multiple aeration heads 20 are installed on the aeration pipe network 8. Aeration is carried out by an externally configured Roots blower 21. The Roots blower 21 is equipped with a frequency converter and is controlled by a central controller. Sensors are installed in the aerobic tank to detect the oxygen content in the water. To achieve a breakthrough in carbon source addition from macroscopic mixing in the tank to precise microscopic spatial control, this technical solution designs a carbon addition mechanism. The carbon addition mechanism is installed at the lower end of the cover plate 2, and the cover plate 2 is sealed and installed at the upper end of the water tank 1. The carbon addition mechanism is a two-dimensional translation mechanism. Through the configured addition components, the carbon source can be uniformly added in the three-dimensional space within the anaerobic tank. The carbon addition mechanism is located within the anaerobic tank and is controlled by a multi-source information acquisition module, a central controller, and a three-point collaborative addition system to achieve precise addition of the controlled mixed liquid. The specific technical solution is as follows; The carbon dosing mechanism includes a first track 9 and a second track 12. The first track 9 and the second track 12 are perpendicular to each other in space, enabling movement in two directions and enabling multi-point carbon source dosing in the anaerobic tank. The first track 9 is fixed to the lower end of the cover plate 2 and is slidably connected to a movable seat 25. The movable seat 25 is slidably connected to a groove opened on the first track 9 via a slider. The lower end of the movable seat 25 is fixedly connected to the upper end of the second track 12. An installation seat 30 is slidably connected inside the second track 12. The installation seat 30 is slidably connected to a guide groove opened on the second track 12 via a guide block. A central shaft 34 is fixedly connected to the second track 12, and the dosing component is installed on the shaft wall of the central shaft 34. A lead screw 27 is installed in the first track 9. Both ends of the lead screw 27 are rotatably connected to the side wall of the cover plate 2 via sealed bearings. An internally threaded tube 26 is threaded onto the wall of the lead screw 27 and is fixed to the movable seat 25. A first motor 3 is fixedly connected to the upper end of the cover plate 2. A chain 29 is installed on one side of the cover plate 2. Two sprockets 28 are wound around the chain 29. One sprocket 28 is fixedly connected to the output shaft of the first motor 3, and the other sprocket 28 is fixedly connected to one end of the lead screw 27. The second track 12 is installed with... The device includes a drive assembly, which includes a synchronous belt 31 that passes through a mounting base 30 and is wound around two synchronous pulleys 36. Both synchronous pulleys 36 are rotatably connected to a second track 12 via a support shaft. One side of the synchronous belt 31 is fixedly connected to the side wall of the mounting base 30 by rivets. A third motor 10 is fixedly connected to the second track 12. The output end of the third motor 10 is coaxially fixedly connected to the support shaft on one of the synchronous pulleys 36. The drive assembly is used to drive the dispensing assembly to move and achieve uniform dispensing of carbon source in the anaerobic tank. During operation, the first motor 3 drives the sprocket 28 and chain 29 to rotate the lead screw 27. When the lead screw 27 rotates, it drives the moving seat 25 to move through the internal threaded tube 26. The movement of the moving seat 25 drives the second track 12, allowing the mounting seat 30 to move along the direction set by the first track 9. At the same time, the third motor 10 drives the synchronous pulley 36 to achieve belt drive of the synchronous belt 31. At this time, the mounting seat 30 can be moved in the direction set by the second track 12 by using the rivet connection. In this way, the installed dispensing component can move to dispense carbon source to the sewage in the anaerobic tank, realizing the active search and precise addition of carbon source in the anaerobic tank, which is dedicated to the utilization of polyphosphate-accumulating bacteria and maximizes the phosphorus release efficiency.

[0023] The dispensing assembly designed in this invention includes a fixing plate 33, which is fixed to the shaft wall of a central shaft 34. Two vertical pipes 13 are symmetrically fixed to the lower end of the fixing plate 33. Multiple nozzles 14 are fixedly connected to the pipe walls of the two vertical pipes 13. A multi-source information acquisition module is equipped with a multi-parameter fusion sensor 15 for diagnosing the optimal dosing target point in the anaerobic tank. The multi-parameter fusion sensor 15 is installed on the same side as the nozzles 14. A support plate is fixedly connected to the lower end of the central shaft 34. A gear ring 32 is fixedly connected to the lower end of the support plate. An agitator 16 is fixedly connected to the lower end of the gear ring 32. A second motor 11 is fixedly connected to the upper end of the fixing plate 33. The output end of the second motor 11 passes through the fixing plate 33 and is fixedly connected to a gear 35. The gear 35 meshes with the gear ring 32. A rotating shaft is rotatably connected to the lower end of the agitator 16 through a sealed bearing. A horizontal plate is fixedly connected to the lower end of the rotating shaft. The horizontal plate is fixed to the lower end of the vertical pipe 13. like Figure 3 As shown, the multi-parameter fusion sensor 15 is installed on the same side as the nozzle 14, and two nozzles 14 and one multi-parameter fusion sensor 15 constitute a delivery unit. This enables dynamic monitoring of real-time data on ORP, nitrate, and phosphate in the anaerobic tank at different heights within the space. Based on the data changes, the nozzle 14 is controlled to quantitatively spray the required carbon source. Simultaneously, when the riser 13 and the agitator 16 move, the water can be agitated and mixed at a low speed. Furthermore, the second motor 11 drives the gear 35 to rotate the gear ring 32, which in turn drives the agitator 16 to rotate actively. This improves the mixing efficiency of the water, allowing the carbon source to diffuse evenly into the anaerobic tank to provide nutrients for polyphosphate-accumulating bacteria.

[0024] like Figure 2 As shown, this technical solution also includes two mixing tanks 6, each equipped with a mixing component. The two mixing tanks 6 allow the mixed liquid in both the internal and external return pipelines to be controlled by the three-point synergistic dosing system to precisely add carbon source to the returned nitrification liquid and sludge.

[0025] One of the mixing tanks, 6, is installed on the internal reflux line. The internal reflux liquid (nitrified liquid reflux) is rich in nitrate nitrogen produced by nitrification in the aerobic tank. Adding a carbon source to the internal reflux line provides sufficient electron donors for the denitrifying bacteria, enabling them to reduce nitrate nitrogen to nitrogen gas and discharge it from the system. This avoids direct reflux of the nitrified liquid competing for the carbon source. Another mixing tank 6 is installed on the external return pipeline. A carbon source is added to the external return (sludge return) pipeline system from the secondary sedimentation tank to the upstream biological tank (anaerobic tank) to remove residual nitrate nitrogen carried in the returned concentrated sludge, eliminating the interference of this nitrate nitrogen on the subsequent anaerobic tank. Through this "pretreatment," a strict anaerobic environment free from nitrate nitrogen competition can be created and maintained for the core phosphorus-removing bacteria (polyphosphate-accumulating bacteria), thereby ensuring the high efficiency and stability of biological phosphorus removal. The mixing components inside the mixing chamber 6 include a circular plate 38, which is fixed inside the mixing chamber 6. Multiple guide pipes 37 of different diameters are fixedly connected to the upper end of the circular plate 38. Each of the multiple guide pipes 37 has a funnel-shaped guide section 40 at its upper end. A mixing channel 39 is formed between two adjacent guide pipes 37. An overflow port is opened through the side wall of the circular plate 38. A conveying pipe is fixedly connected to one side of the mixing chamber 6, and a carbon source addition pipe is provided on the other side of the mixing chamber 6. A sealing plate is installed at the upper end of the mixing chamber 6. A drain pipe is fixedly connected to the upper end of the sealing plate, and a guide block 41 is fixedly connected to the lower end of the sealing plate. The guide block 41 is located at the upper end of the smallest diameter guide pipe 37, and the lower end of the drain pipe is located at the upper end of the guide block 41. The side wall of the mixing chamber 6 is provided with a concave part, which cooperates with the largest diameter guide pipe 37 to form the outermost mixing channel 39.

[0026] like Figure 8 As shown, a sensor assembly for detecting nitrate nitrogen concentration is installed at the bottom of the mixing tank 6. After being connected to the return pipeline according to the actual pipeline, the return liquid and the added carbon source enter the bottom of the mixing tank 6 together, and then pass through the flow port into multiple mixing channels 39. During the flow process, the carbon source can be fully mixed with the return liquid, thus eliminating the interference of these nitrate nitrogen to the subsequent anaerobic tank, so that it will not compete for carbon source after entering the anaerobic tank.

[0027] The system workflow of this technical solution is as follows; like Figure 9 As shown, the central controller configured in this technical solution runs a multi-level carbon source allocation algorithm to process sensor data configured by the multi-source information acquisition module and send instructions to the actuators of the system. At the same time, it is configured with industrial Ethernet, switches, waterproof cables and power distribution cabinets to ensure stable data and power transmission.

[0028] The central control and decision-making module is the brain of the system. It is implemented by a central controller that runs a "multi-level carbon source dynamic allocation algorithm." It receives all sensing data, dynamically calculates and outputs three independent control commands through the built-in process model and optimization algorithm. Its decision-making logic follows priority, ensuring denitrification (the first two points) first, and then optimizing phosphorus removal (the core point).

[0029] Furthermore, the algorithm can understand the relationships between various process units. For example, it predicts the total nitrogen content based on the influent load, dynamically adjusts the carbon source required to remove this portion of nitrate nitrogen based on the reflux nitrate data, and ultimately intelligently allocates the "remaining" carbon source quota to the anaerobic tank for targeted dosing. The multi-source information acquisition module is equipped with a multi-parameter fusion sensor 15, which integrates ORP, nitrate, and phosphate probes for diagnosing the optimal dosing point in the anaerobic tank. The multi-source information acquisition module is also equipped with a nitrate meter for the return pipeline, which is installed on the external return sludge pipe to monitor the concentration of nitrate nitrogen in the return flow and serve as a control signal for the sludge return dosing point. The multi-source information acquisition module is also equipped with an influent water quality instrument, which uses a conventional online flow and COD / ammonia nitrogen analyzer to provide influent load data for feedforward calculations.

[0030] The system is equipped with a purposeful and cost-effective sensor network at three key process nodes, rather than simply piling them up.

[0031] Specifically, the sensors used in the anaerobic tank are integrated and installed on the carbon dosing mechanism, serving as the system's "precision eyes." They are equipped with integrated multi-parameter fusion probes for ORP (oxidation-reduction potential), nitrate, and phosphate, used for in-situ, real-time diagnosis of the carbon source requirements of the microenvironment within the anaerobic tank.

[0032] A dedicated online nitrate analyzer is installed on the sludge return pipeline to monitor the concentration of nitrate nitrogen in the returned sludge in a single and accurate manner, with the goal of reducing it to near zero.

[0033] Conventional online meters for flow rate, COD / TOC, and ammonia nitrogen are installed at the inlet to provide basic data on system load.

[0034] The three-point coordinated dosing system includes three metering pumps and related connecting pipes and carbon source tanks. The metering pumps quantitatively deliver carbon source to the carbon dosing mechanism, the internal return pipeline, and the external return pipeline. A lift pump 22 is installed on the internal return pipeline to return the nitrified liquid in the aerobic tank to the anoxic tank. A sludge pump is installed on the return pipeline to return the activated sludge in the secondary sedimentation tank to the anaerobic tank.

[0035] In summary, this system, through a multi-source sensor network configured at the inlet, sludge return, and anaerobic tank, achieves monitoring of key water quality parameters (such as COD and NH4). + NO3 - PO4³ -The system employs in-situ and online real-time monitoring of ORP (Oxygen Response Points), and a multi-level dynamic carbon source allocation algorithm running in the central controller. Based on the aforementioned real-time data and the built-in process model, it performs coordinated optimization control and dynamic spatial allocation of carbon sources at the influent / anoxic tank dosing point, sludge return point dosing point, and anaerobic tank targeted dosing. This fundamentally solves the carbon source competition contradiction in the denitrification and phosphorus removal processes under the traditional single carbon source dosing method. Through a priority dynamic allocation strategy, while ensuring the basic needs of denitrification, it creates and maintains a strict low-carbon source competition environment for anaerobic phosphorus release, thereby achieving a simultaneous and stable improvement in total nitrogen and total phosphorus removal efficiency. Secondly, the system's precise dosing greatly optimizes carbon source utilization. The influent point is dosing based on a feedforward model, the return point is precisely removed based on nitrate nitrogen feedback, and the anaerobic point is targeted dosing based on multi-parameter fusion diagnosis. This coordinated mechanism allows external carbon sources to be guided to the target biochemical reaction to the maximum extent. Furthermore, the system's feedforward-feedback composite control logic endows the process with stronger resistance to load shocks and operational stability, enabling it to proactively adapt to fluctuations in influent water quality and quantity, effectively suppressing the interference of backflow nitrate nitrogen on the anaerobic environment, and ensuring the long-term stability of the biochemical system, especially the metabolic activity of polyphosphate-accumulating bacteria communities.

[0036] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device that synergistically optimizes aeration and carbon dosing, comprising a water tank (1), a cover plate (2), a multi-source information acquisition module, a central controller, and a three-point synergistic dosing system, characterized in that, Also includes: A carbon dosing mechanism is installed at the lower end of a cover plate (2), which is sealed at the upper end of a water tank (1). A first partition plate (24) and a second partition plate (19) are fixedly connected inside the water tank (1). The water tank (1) is divided into an anaerobic tank, an anoxic tank, and an aerobic tank by the first partition plate (24) and the second partition plate (19). The carbon dosing mechanism is a two-dimensional translation mechanism. The carbon source can be uniformly added in the three-dimensional space inside the anaerobic tank by the configured dosing components. The carbon dosing mechanism is located in the anaerobic tank and is controlled by a multi-source information acquisition module, a central controller and a three-point coordinated dosing system to achieve precise dosing of the controlled mixture. Mixing tank (6), two mixing tanks (6) are provided, and each is equipped with a mixing component. Through the two mixing tanks (6), the mixed liquid in the inner return pipeline and the outer return pipeline can be controlled by the three-point synergistic dosing system to accurately add carbon source to the returned nitrified liquid and sludge.

2. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 1, characterized in that: The carbon dosing mechanism includes a first track (9) and a second track (12). The first track (9) is fixed to the lower end of the cover plate (2) and slidably connected to a movable seat (25). The movable seat (25) is slidably connected to a groove on the first track (9) via a slider. The lower end of the movable seat (25) is fixedly connected to the upper end of the second track (12). A mounting seat (30) is slidably connected inside the second track (12). The mounting seat (30) is slidably connected to a guide groove on the second track (12) via a guide block. A central shaft (34) is fixedly connected to the second track (12). The dosing component is installed on the shaft wall of the central shaft (34). A lead screw (27) is provided in the first track (9). Both ends of the lead screw (27) are rotatably connected to the side wall of the cover plate (2) through sealed bearings. An internal threaded tube (26) is threaded on the rod wall of the lead screw (27). The internal threaded tube (26) is fixed on the moving seat (25). A first motor (3) is fixedly connected to the upper end of the cover plate (2). A chain (29) is provided on one side of the cover plate (2). Two sprockets (28) are wound around the chain (29). One of the sprockets (28) is fixedly connected to the output shaft of the first motor (3), and the other sprocket (28) is fixedly connected to one end of the lead screw (27). A drive assembly is installed in the second track (12). The drive assembly is used to drive the dispensing assembly to move and achieve uniform dispensing of carbon source in the anaerobic tank.

3. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 2, characterized in that: The dispensing assembly includes a fixing plate (33), which is fixed on the axial wall of the central shaft (34). Two vertical pipes (13) are symmetrically fixedly connected to the lower end of the fixing plate (33). Multiple nozzles (14) are fixedly connected to the pipe walls of the two vertical pipes (13). The multi-source information acquisition module is equipped with a multi-parameter fusion sensor (15) for diagnosing the optimal dosing target point in the anaerobic tank. The multi-parameter fusion sensor (15) is installed on the same side as the nozzles (14).

4. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 3, characterized in that: A support plate is fixedly connected to the lower end of the central shaft (34), a gear ring (32) is fixedly connected to the lower end of the support plate, an agitator (16) is fixedly connected to the lower end of the gear ring (32), a second motor (11) is fixedly connected to the upper end of the fixed plate (33), the output end of the second motor (11) passes through the fixed plate (33) and is fixedly connected to a gear (35), the gear (35) meshes with the gear ring (32), a rotating shaft is rotatably connected to the lower end of the agitator (16) through a sealed bearing, a horizontal plate is fixedly connected to the lower end of the rotating shaft, and the horizontal plate is fixed to the lower end of the riser (13).

5. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 2, characterized in that: The drive assembly includes a timing belt (31) that passes through a mounting base (30) and is wound around two timing pulleys (36). Both timing pulleys (36) are rotatably connected to a second track (12) via a support shaft. One side of the timing belt (31) is fixedly connected to the side wall of the mounting base (30) by a rivet. A third motor (10) is fixedly connected to the second track (12). The output end of the third motor (10) is coaxially fixedly connected to the support shaft on one of the timing pulleys (36).

6. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 1, characterized in that: The mixing assembly includes a circular plate (38) fixed inside a mixing tank (6). The upper end of the circular plate (38) is fixedly connected to multiple guide pipes (37) of different diameters. The upper ends of the multiple guide pipes (37) are provided with a funnel-shaped guide section (40). A mixing channel (39) is formed between two adjacent guide pipes (37). An overflow port is opened through the side wall of the circular plate (38). A conveying pipe is fixedly connected to one side of the mixing tank (6). A carbon source addition pipe is provided on the other side of the mixing tank (6). A sealing plate is installed at the upper end of the mixing tank (6). A drain pipe is fixedly connected to the upper end of the sealing plate. The lower end of the sealing plate is fixedly connected to a guide block (41), the guide block (41) is located at the upper end of the guide pipe (37) with the smallest diameter, the lower end of the drain pipe is located at the upper end of the guide block (41), the side wall of the mixing box (6) is provided with a concave part, the concave part cooperates with the guide pipe (37) with the largest diameter to form the outermost mixing channel (39).

7. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 3, characterized in that: The multi-parameter fusion sensor (15) configured in the multi-source information acquisition module integrates ORP, nitrate, and phosphate probes for diagnosing the optimal dosing point in the anaerobic tank. The multi-source information acquisition module is also equipped with a nitrate meter for the return pipeline, which is installed on the external return sludge pipe to monitor the concentration of nitrate nitrogen in the return flow and serve as a control signal for the sludge return dosing point. The multi-source information acquisition module is also equipped with an influent water quality instrument, which uses a conventional online flow and COD / ammonia nitrogen analyzer to provide influent load data for feedforward calculation.

8. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 1, characterized in that: The three-point coordinated dosing system includes three metering pumps and related connecting pipes and carbon source tanks. The metering pumps quantitatively deliver carbon source to the carbon dosing mechanism, the internal return pipeline and the external return pipeline. The internal return pipeline is equipped with a lift pump (22) to return the nitrified liquid in the aerobic tank to the anoxic tank. The return pipeline is equipped with a sludge pump to return the activated sludge in the secondary sedimentation tank to the anaerobic tank.

9. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 1, characterized in that: The central controller runs a multi-level carbon source allocation algorithm to process all sensor data configured by the multi-source information acquisition module and sends instructions to the actuators of all systems. It also configures industrial Ethernet, switches, waterproof cables and power distribution cabinets to ensure stable data and power transmission.

10. The wastewater treatment equipment for synergistic optimization of aeration and carbon addition according to claim 1, characterized in that: A water inlet pipe (4) is fixedly connected to one side of the water tank (1), and a drain pipe (23) is provided on the other side of the water tank (1). Multiple overflow pipes (17) are fixedly connected to one side of the first partition (24), and an overflow port (18) is provided on the side wall of the second partition (19). The heights of the water inlet pipe (4), overflow pipe (17), overflow port (18) and drain pipe (23) decrease sequentially. A cone bottom (7) is provided at the bottom of the water tank (1), and a sewage pipe (5) is fixedly connected at the lowest point of the cone bottom (7). An aeration pipe (8) network is installed in the aerobic tank, and multiple aeration heads (20) are installed on the aeration pipe (8) network. Aeration is carried out by an externally configured Roots blower (21).

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