Intelligent collaborative control device and method for aerobic granular sludge process

Abstract

The application discloses an intelligent collaborative control device and method for an aerobic granular sludge process, which comprises an anoxic tank, a granulation device, a classifier device, a cyclone, an aerobic tank, a sedimentation tank and a central controller. After sewage is stirred and mixed in the anoxic tank, the sewage enters the granulation device, the flow guide plate of the granulation device is used to change the inclination angle to shear and granulate, after granulation, the sewage enters the classifier device, the granular sludge and suspended matter are filtered through multiple machine screen meshes, the sewage is oxygenated by using an aeration control system, dissolved oxygen and granular particle size data are transmitted to the central controller to adjust the gas quantity of each aeration subarea, after screening, the sewage enters the cyclone to control the strength of shearing force, and short-chain fatty acid concentrated solution is injected to classify the sewage for sedimentation. The device and the method are combined, manual intervention demand is reduced, and reliable equipment and control basis are provided for the standardization and large-scale application of the AGS process.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to an intelligent collaborative control device and method for aerobic granular sludge processes. Background Technology

[0002] Aerobic granular sludge technology is considered a new generation of efficient and low-consumption wastewater treatment technology due to its excellent settling performance, high biomass, and strong simultaneous nitrogen and phosphorus removal capabilities. However, its engineering application has long been limited by core bottlenecks such as the single method of hydraulic selective pressure control, the difficulty in accurately maintaining the dissolved oxygen (DO) environment, and the lack of selectivity in sludge discharge.

[0003] Existing technologies suffer from the following main drawbacks: The hydraulic selective pressure of traditional AGS reactors relies entirely on aeration intensity, with limited adjustment methods. Furthermore, increasing aeration significantly increases energy consumption and may damage particles while raising shear force. Natural hydraulic screening during settling is passive and slow. Aeration control modes (such as on / off control) cannot maintain the narrow-range, low-concentration dissolved oxygen environment required by the AGS process, making it difficult to optimize the microenvironment within the particles for efficient nitrogen and phosphorus removal. Traditional sludge removal equipment cannot achieve "selective sludge removal" based on particle settling performance, leading to the loss of mature particles or the accumulation of ineffective flocs, thus compromising system stability. These issues, coupled at the equipment and control levels, constitute the main bottlenecks hindering the widespread adoption of the AGS process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an intelligent collaborative control device and method for aerobic granular sludge process, which addresses the shortcomings of existing technologies and ensures rapid start-up, long-term stability and efficient operation of aerobic granular sludge process.

[0005] The technical problem to be solved by the present invention is achieved by the following technical solution: an intelligent collaborative control method for aerobic granular sludge processes, based on an intelligent collaborative control device for aerobic granular sludge processes, comprising the following steps: Step 1: Wastewater enters the anoxic tank through the inlet system, and the wastewater is evenly mixed with the inoculated sludge by a submersible mixer. Step 2: After mixing in the anoxic tank, the wastewater enters the granulation equipment. The sludge rises in the granulation equipment through aeration and collides with the guide plate that can rotate around the axis. By adjusting the tilt angle of the guide plate, the sludge particles are sheared and granulated. The wastewater is oxygenated by the first precision aeration control system at the bottom. The dissolved oxygen is transmitted to the central controller through the first DO sensor. The central controller dynamically adjusts the air volume of each aeration zone. The average particle size is analyzed by the online first particle size analyzer and transmitted to the central controller to adjust the total aeration intensity. Step 3: After granulation, the wastewater enters the classifier equipment. The classifier equipment filters granular sludge and suspended solids through multi-machine screens. The wastewater is oxygenated by the bottom second precision aeration control system. The dissolved oxygen and particle size data are transmitted to the central controller through the second DO sensor. The central controller dynamically adjusts the air volume of each aeration zone. Step 4: After being screened by multiple screens, the particulate sludge and suspended solids in the wastewater enter the hydrocyclone. A variable frequency agitator is installed at the top of the hydrocyclone. By adjusting the agitation speed and the cone angle of the hydrocyclone, the intensity of the shear force is controlled. The upper part of the hydrocyclone is provided with a short-chain fatty acid concentrated solution injection port, which produces a biochemical reaction after injection. Step 5: After the reaction, particles with good settling properties in the wastewater gather at the bottom of the hydrocyclone and are pumped to the anoxic tank and aerobic tank. The rest are returned to the anoxic tank for further circulation and reaction until the standard is met and then settled.

[0006] When the sludge concentration in the anoxic tank is below 3000 mg / L, granular sludge from the bottom of the hydrocyclone is pumped over to replenish the sludge concentration.

[0007] Both the first and second precision aeration control systems precisely control the DO concentration between 0.8 and 1.5 mg / L via aeration control valves.

[0008] This invention discloses an intelligent collaborative control device for aerobic granular sludge processes, comprising: Anoxic tank, which is equipped with a submersible mixer and a sludge concentration meter; The granulation equipment is equipped with a guide plate, a first particle size analyzer, a first DO sensor, and a first precision aeration control system. A classifier device, wherein the classifier device is equipped with multi-stage screen plates, a second precision aeration control system and a second DO sensor. The hydrocyclone is equipped with a frequency converter, a second particle size analyzer, a short-chain fatty acid injection port, and a quick connector. The aerobic tank receives wastewater treated by the hydrocyclone. A sedimentation tank, wherein the sedimentation tank separates the activated sludge carried in the effluent of the aerobic tank; The central controller receives real-time monitoring data from each unit. The anoxic tank, granulation equipment, classifier equipment, hydrocyclone, aerobic tank, and sedimentation tank are connected in sequence.

[0009] Multiple guide plates that can rotate around an axis are installed at different heights on the inner wall of the granulation equipment. The guide plates are connected to waterproof servo motors, and the waterproof servo motors are connected to a central controller.

[0010] The granulation equipment is equipped with a first precision aeration control system at the bottom. The first precision aeration control system includes a first DO sensor, an online gas flow meter, an aeration control valve, and a multi-parameter controller. The aeration control valve and the multi-parameter controller are connected to a central controller. The granulation equipment outlet is equipped with an online first particle size analyzer.

[0011] The classifier device has multiple screens at different heights on its inner wall. The multiple screens include a first-level screen, a second-level screen, and a third-level screen, with the aperture decreasing from bottom to top.

[0012] The classifier device is equipped with a second precision aeration control system at its bottom. The second precision aeration control system includes a second DO sensor, an online gas flow meter, an aeration control valve, and a multi-parameter controller. The aeration control valve and the multi-parameter controller are connected to the central controller.

[0013] The hydrocyclone is composed of multiple short cone segments with different cone angles connected in series by quick connectors. A variable frequency stirrer is installed at the bottom, a short-chain fatty acid injection port is provided on the side wall, and an online second particle size analyzer is provided inside or at the outlet.

[0014] The following beneficial effects can be obtained by implementing the present invention: 1. This invention uses a rotatable guide plate system to actively change the fluid dynamics inside the reactor according to the process requirements of granular sludge, rather than passively accepting the flow field generated by a single aeration. 2. This invention separates the two functions of hydraulic selective pressure regulation and aeration oxygen supply, and achieves independent, precise, and energy-saving stepless speed control of selective pressure by adjusting the flow field through mechanical structure; 3. The mechanical stirring-driven cyclone of the present invention consumes less energy than the pumping pressurization method that achieves the same shearing effect, and avoids the pressure loss in the pipeline of the traditional hydrocyclone. 4. This invention reduces the need for manual intervention and provides a reliable equipment and control foundation for the standardized and large-scale application of AGS technology. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an aerobic granular sludge process according to the present invention.

[0016] Figure 2 This is a schematic diagram of the cone segment modules at different angles of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1As shown, this invention discloses an intelligent collaborative control device for aerobic granular sludge process, including an anoxic tank 1, a granulation device 2, a classifier device 3, a hydrocyclone 4, an aerobic tank 5, a sedimentation tank 6, and a central controller 7. The anoxic tank 1 is connected to the granulation device 2, the granulation device 2 is connected to the classifier device 3, the classifier device 3 is connected to the hydrocyclone 4, the hydrocyclone 4 is connected to the aerobic tank 5, and the aerobic tank 5 is connected to the sedimentation tank 6. The connection method is pipeline connection.

[0019] The anoxic tank 1 is equipped with a submersible mixer 101 and a sludge concentration meter 102.

[0020] The granulation equipment 2 is equipped with a guide plate 201, a first particle size analyzer 203, a first DO sensor 204, and a first precision aeration control system 205. A series of guide plates 201 that can rotate around an axis are provided at different heights on the inner wall of the granulation equipment 2. The first precision aeration control system 205 is provided at the bottom. The first precision aeration control system 205 includes a first DO sensor 204, an online gas flow meter, an aeration control valve, and a multi-parameter controller. The aeration control valve and the multi-parameter controller are connected to the central controller 7. An online first particle size analyzer 203 is provided at the outlet of the granulation equipment 2.

[0021] The classifier device 3 is equipped with multi-stage screen plates, a second precision aeration control system 304, and a second DO sensor 305. The multi-stage screen plates include a first-stage screen plate 301, a second-stage screen plate 302, and a third-stage screen plate 303. The aperture of the screen plates decreases progressively from bottom to top in the classifier device 3. The second precision aeration control system 304 is installed at the bottom of the classifier device 3. The second precision aeration control system 304 includes a second DO sensor 305, an online gas flow meter, an aeration control valve, and a multi-parameter controller. The aeration control valve and the multi-parameter controller are connected to the central controller 7.

[0022] The hydrocyclone 4 is equipped with a frequency converter 401, a second particle size analyzer 402, a short-chain fatty acid inlet 403, and a quick connector 404. The hydrocyclone 4 is composed of multiple short-cone segments with different cone angles connected in series via quick connectors 404. The frequency converter 401 is installed at the bottom, the short-chain fatty acid inlet 403 is provided on the side wall, and the online second particle size analyzer 402 is provided inside or at the outlet.

[0023] The aerobic tank 5 receives wastewater treated by the hydrocyclone 4 and uses aerobic microorganisms (heterotrophic bacteria) to completely oxidize and decompose the remaining organic matter in the wastewater into carbon dioxide and water. Under aerobic conditions, nitrifying bacteria (autotrophic bacteria) convert ammonia nitrogen into nitrate nitrogen.

[0024] Sedimentation tank 6, as the last solid-liquid separation unit in the entire process, has the core function of separating the activated sludge (a small amount of flocs) carried in the effluent of aerobic tank 5 from the purified water through gravity sedimentation.

[0025] The central controller 7 receives real-time monitoring data from each process unit and runs built-in intelligent algorithms to precisely and dynamically coordinate all actuators in the entire aerobic granular sludge process system, ensuring that the system always operates in the best condition and achieves rapid granulation of sludge.

[0026] The guide plate 201 is connected to the waterproof servo motor 202, and the waterproof servo motor 202 is connected to the central controller 7.

[0027] Based on an intelligent collaborative control device for aerobic granular sludge processes, this invention also discloses an intelligent collaborative control method for aerobic granular sludge processes, the specific steps of which are as follows: Step 1: Wastewater enters the anoxic tank 1 through the inlet system, and the wastewater is evenly mixed with the inoculated sludge by the submersible mixer 101.

[0028] In this step, the inoculated sludge is either flocculent activated sludge or pre-granulated aerobic granular sludge. The sludge concentration in the anoxic tank 1 is monitored using a sludge concentration meter 102. Typically, the sludge concentration needs to be maintained at 2000-4000 mg / L MLSS (mixed liquor suspended solids concentration) to ensure sufficient biomass. Complex, recalcitrant macromolecular organic matter (such as polysaccharides and proteins) in the influent wastewater is hydrolyzed and fermented into smaller, easily degradable volatile fatty acids. This hydrolysis and fermentation is not achieved through chemical catalysts but through enzymatic catalysis, making it a biochemical reaction process. The anoxic tank contains a large number of facultative anaerobic fermenting bacteria. These bacteria secrete extracellular enzymes (such as proteases, cellulases, amylases, etc.) to hydrolyze large molecules and insoluble organic matter (polysaccharides, proteins, lipids) in the influent into small molecules and soluble organic matter (such as monosaccharides, amino acids, fatty acids). This provides a higher quality and more readily available carbon source for polyphosphate-accumulating bacteria (PAOs) and denitrifying bacteria inside the sludge particles in the subsequent AGS reactor, significantly improving biological phosphorus removal efficiency and in-granular denitrification potential.

[0029] Step two: After mixing in the anoxic tank 1, the wastewater enters the granulation equipment 2. The sludge rises within the granulation equipment 2 through aeration and collides with a rotatable guide plate 201. By adjusting the angle of the guide plate 201, the sludge particles are sheared and granulated. The wastewater is oxygenated by the first precision aeration control system 205 at the bottom. The first DO sensor 204 transmits the dissolved oxygen in the wastewater to the central controller 7. The central controller 7, using its built-in algorithm system, receives multiple input signals of dissolved oxygen and, based on a preset target model, controls the opening size of the aeration control valve according to the dissolved oxygen level, ultimately controlling the aeration volume to obtain the optimal control command. It dynamically adjusts the air volume of each aeration zone, precisely controlling the DO concentration within the set range of 0.8-1.5 mg / L through the aeration control valve. The average particle size is analyzed by the online first particle size analyzer 203 and transmitted to the central controller 7, which adjusts the overall aeration intensity. Because the shear force generated by aeration directly affects particle formation, size, and stability, the system needs to adjust the aeration inversely according to the particle size to maintain dynamic balance. For example, when the average particle size exceeds the target range, it means the particles may be too large, potentially leading to anaerobic zones inside, causing core dissolution and particle instability. In this case, the system will instruct an appropriate increase in aeration intensity to generate stronger shear force, peeling away the aged biofilm on the surface of large particles, reducing their size and making their structure denser. When the average particle size is too small or the proportion of flocs is high, it means the shear force is insufficient, making it difficult for microorganisms to aggregate effectively. In this case, the system will instruct an appropriate increase in aeration intensity to provide stronger hydraulic selective pressure, promoting microbial collision and granulation, achieving a dynamic balance between shear force and particle stability.

[0030] In this step, the sludge forms an upward flow through aeration within the granulation equipment 2, colliding with a series of rotatable guide plates 201 during its ascent. At the initial granulation start-up, the guide plates 201 adjust their angle to a range of 45°-60°, guiding the fluid to form a more intense swirling or upward flow. This significantly increases local flow velocity and turbulence intensity without increasing aeration volume, providing strong shear force for microbial collision and initial granulation. When the online particle size analyzer 203 detects that the average particle size in the sludge is greater than 1.5 mm and accounts for more than 70%, the system enters a mature operating mode. In this mode, the guide plates adjust their angle to a range of 15°-30°, providing gentle but uniform cyclic shear, primarily to maintain particle stability and mass transfer in the sludge, avoiding excessive energy consumption and wear, promoting stable particle growth, and simultaneously washing out flocs with poor settling performance. During system operation, the angle of the guide plates in different areas is dynamically fine-tuned based on the online monitoring data from the online particle size analyzer 203. The shaft of the guide plate 201 is connected to the waterproof servo motor 202, which precisely controls its angle and speed. The central controller 7 sends commands to the waterproof servo motor 202 to control the rotation angle, thereby driving the guide plate 201 to rotate to a preset tilt angle, instantly optimizing the sludge mixing and particle shearing state in the reactor to cope with changes in the influent load.

[0031] Step 3: After granulation, the wastewater enters the classifier device 3. The classifier device 3 filters granular sludge and suspended solids through multi-stage screens. The wastewater is oxygenated by the bottom second precision aeration control system 304. The dissolved oxygen and particle size data are transmitted to the central controller 7 through the second DO sensor 305. The central controller 7 dynamically adjusts the air volume of each aeration zone.

[0032] In this step, the classifier device 3 contains multiple levels of screens made of high-strength, corrosion-resistant, and smooth-surfaced 316L stainless steel. The screens include a primary screen 301, a secondary screen 302, and a tertiary screen 303, decreasing in size from bottom to top within the classifier device 3: 5mm for the first level, 3mm for the second level, and 1.5mm for the third level. When the mixed liquor (sludge and wastewater) is forced through the screens by the upward flow, large, loose flocs are cut and broken down by the screen openings, transforming into smaller cores or fragments. Smaller, denser particles can pass smoothly through the first few large-aperture screens, while loose, large flocs are trapped and continue to be sheared. At the final small-aperture screen, only mature particles that have reached a certain size and density can pass through. When particles pass through the sieve, the aged biofilm on the surface is "scraped" off, exposing fresh microbial growth points. This significantly enhances the mass transfer efficiency of the matrix and oxygen into the particle interior, improves reactivity, and thus actively inhibits excessive particle size increase, maintains the uniformity of the particle size distribution in the system, and achieves surface renewal and mass transfer.

[0033] Step 4: After being screened by a multi-stage screen, the particulate sludge and suspended solids in the wastewater enter the hydrocyclone 4. A variable frequency agitator 401 is installed on the top of the hydrocyclone 4. The intensity of the shear force is controlled by adjusting the agitation speed and the cone angle of the hydrocyclone. The upper part of the hydrocyclone 4 is provided with a short-chain fatty acid concentrated solution injection port 403, which produces a biochemical reaction after injection.

[0034] In this step, after being screened through multiple stages, the wastewater ultimately yields granular sludge and suspended solids smaller than 1.5mm, which then enters hydrocyclone 4. A variable frequency agitator 401 is installed at the top of hydrocyclone 4. The core conical section of hydrocyclone 4 is designed as a standardized, quickly detachable, independent module. A pre-prepared library of conical modules, containing various conical section modules with different cone angles, such as... Figure 2As shown, the cone angles include 10°, 15°, 20°, 25°, and 30°. The longer the cone, the smaller the angle, resulting in a smoother change in the fluid rotation radius, slower descent speed, and longer residence time. During the longer descent, the particles experience continuous and stable shear friction in the centrifugal force field, which can more effectively peel off aged biofilms and produce a finer centrifugal force classification effect. All cone segment modules have uniform interface dimensions and are connected via quick connectors 404. The stirring speed of the mixer 401 is infinitely adjustable via frequency conversion. The particles in the wastewater are subjected to strong centrifugal force in the hydrocyclone 4, and the stress on their dense core and loose outer layer is different. At the same time, the particles rotate and slide down the wall at high speed, generating controllable frictional shear, achieving linear, instantaneous, and precise control of the swirling intensity (shear force), with a response speed far exceeding that of regulating pumps or valves. An online second particle size analyzer 402 is installed at the outlet of the hydrocyclone 4 to obtain particle characteristics in real time. The central controller 7 sends commands to adjust the speed of the variable frequency drive (VFD) mixer 401 and to change the cone angle of the hydrocyclone 4 by replacing different cone segment modules. Once the entire process is stable, the cone segment modules no longer need to be replaced. By adjusting the stirring speed and the hydrocyclone cone angle, the intensity of shear force can be precisely controlled, enabling the effective stripping of aged biofilm and excess extracellular polymers from the particle surface, exposing fresh microbial growth points, and simultaneously strengthening the density of the core. This is equivalent to periodically strengthening the particles, rather than a coarse screening. The VFD mixer 401 operates at a constant low speed, forming a stable and gentle global swirling flow within the reactor. This flow pattern is conducive to creating a stable centrifugal settling field, causing denser, high-performance particles to accumulate towards the outside and bottom of the reactor, while less dense flocs, due to lower centrifugal force, gather towards the central axis at the top and are discharged as slow-growing, aged, or loosely structured floc sludge and fine particles. In the hydrocyclone 4, hydraulic selective pressure is generated under hydraulic centrifugal conditions (such as water flow velocity, shear force, etc.), which is the pressure that screens the microbial community. Sludge with good settling properties and a dense structure (i.e., granular sludge) is retained in the reactor, while flocculent sludge with poor settling properties and a loose structure is "discarded." It is this screening process that forces microorganisms to aggregate into particles to avoid being washed away.

[0035] A short-chain fatty acid concentrated solution injection port 403 is provided above the hydrocyclone 4. To stimulate polyphosphate-accumulating bacteria to reach peak metabolic conditions and further improve the efficiency of simultaneous nitrogen and phosphorus removal, a short-chain fatty acid concentrated solution is injected. The injection volume of the short-chain fatty acid concentrated solution is set according to the influent COD value. When the influent carbon source is insufficient (COD / N < 5), the injection volume is 10%-20% of the influent COD value (calculated based on sodium acetate, the main component of the short-chain fatty acid concentrated solution, with a concentration of 1-2 mol / L). The effect of short-chain fatty acids on polyphosphate metabolism is equivalently calculated using the molar concentration of sodium acetate, which facilitates the conversion into a supplementary ratio for influent COD. That is, the dosage is easily calculated based on the sodium acetate concentration. After injection, the mechanical energy of the impeller of the frequency converter 401 is directly converted into swirling kinetic energy, realizing the seamless integration of hydraulic shearing, material mixing, and biochemical reactions in space and the synchronous occurrence in time. During the short time that the particles in the sludge pass through the hydrocyclone 4, the surface microorganisms are exposed to the nutrient substrate, achieving instantaneous ultra-high load mass transfer. This pulsed stimulation can greatly enhance the metabolic activity of microorganisms, and can induce the production of special enzyme systems or the secretion of more EPS.

[0036] Step 5: After the reaction, particles with good settling properties in the wastewater gather at the bottom of the hydrocyclone 4 and are pumped to the anoxic tank 1 and the aerobic tank 5. The wastewater returned to the anoxic tank 1 is further circulated and reacted in the anoxic tank 1 until it reaches the standard and settles.

[0037] In this step, denser, high-performance particles accumulate at the bottom of the reactor and are pumped to anoxic tank 1 and aerobic tank 5. Some particles rich in aging material and with slightly poor settling properties are either returned to anoxic tank 1 or discharged. Under anoxic conditions, the denitrifying bacteria inside these particles are activated, consuming internal storage and secreting new extracellular polymeric substances (EPS), thus repairing their structure. Particles with good settling properties are pumped to the front end of anoxic tank 1 to immediately replenish and enhance the biomass of the entire system, ensuring that the mixed liquor entering granulation equipment 2 has sufficient sludge concentration and excellent granulation potential. Other wastewater (this portion is relatively small) does not undergo high-intensity aerobic metabolism in anoxic conditions but instead undergoes endogenous respiration, consuming internal storage. Simultaneously, denitrifying bacteria can utilize residual carbon sources for denitrification, secreting new EPS to repair their damaged structure. After an anoxic-aerobic cycle, their settling performance can be restored.

[0038] This invention incorporates a core control algorithm system in the central processing unit 7. This system receives real-time data on sludge concentration (MLSS), particle size distribution (PSD), DO values ​​of each unit, and influent water quality (COD, N, P, flow rate). Based on experimental data, it sets aeration rates, cone modules, guide vane angles, and sludge discharge, integrating the aforementioned hardware systems into a cohesive whole. This algorithm system aims to maintain the target particle size range, optimize sludge concentration, and ensure effluent water quality as multiple optimization objectives. It processes monitoring data in real-time and outputs collaborative control commands, including triggering selective sludge discharge based on particle size distribution and sludge age models. The online second particle size analyzer 402 in the hydrocyclone 4 monitors the sludge particle size distribution in real-time, and simultaneously estimates the sludge age based on sludge concentration and load. Sludge discharge is required when a large proportion of particles (>2.0 mm) reaches 10%~15%. The sludge age model is calculated, and a certain amount of phosphorus-rich aged sludge is discharged to achieve efficient phosphorus removal. The aeration mode is adjusted based on DO trends and influent load predictions. If DO (dissolved oxygen) continues to decrease, even if the current value is still within the set range, the algorithm system will predict that the influent load may be increasing. In this case, it will increase the air volume of the corresponding aeration zone slightly in advance, or change the aeration mode, to prevent DO from falling out of control. If DO continues to rise, it indicates a decrease in load, and the algorithm system will reduce the air volume slightly in advance to save energy. There are two aeration modes: constant DO mode and intermittent aeration mode. Constant DO mode is the normal operating mode, aiming to precisely maintain DO within the set value. In intermittent aeration mode, when enhanced denitrification is needed, the central controller instructs the aeration system to periodically switch on and off. For example, aeration for 1 hour (nitrification), followed by 1 hour of cessation (denitrification). The switching time and cycle can be dynamically optimized by the algorithm system based on the influent nitrogen load and nitrate concentration.

Claims

1. An intelligent collaborative control method for aerobic granular sludge processes, characterized in that, Includes the following steps: Step 1: Wastewater enters the anoxic tank (1) through the inlet system, and the wastewater is mixed evenly with the inoculated sludge by a submersible mixer (101); Step 2: The wastewater mixed in the anoxic tank (1) enters the granulation equipment (2). The sludge rises in the granulation equipment (2) through aeration and collides with the guide plate (201) that can rotate around the axis. By adjusting the tilt angle of the guide plate (201), the sludge particles are sheared and granulated. The wastewater is oxygenated by the first precision aeration control system (205) at the bottom. The dissolved oxygen is transmitted to the central controller (7) through the first DO sensor (204). The central controller (7) dynamically adjusts the air volume of each aeration zone. The average particle size is analyzed by the online first particle size analyzer (203) and transmitted to the central controller (7) to adjust the total aeration intensity. Step 3: After granulation, the wastewater enters the classifier device (3). The classifier device (3) filters granular sludge and suspended solids through a multi-machine screen. The wastewater is oxygenated by the bottom second precision aeration control system (304). The dissolved oxygen and particle size data are transmitted to the central controller (7) through the second DO sensor (305). The central controller (7) dynamically adjusts the air volume of each aeration zone. Step 4: The particulate sludge and suspended solids in the sewage enter the hydrocyclone (4) after being screened by a multi-stage screen. A variable frequency stirring machine (401) is installed at the top of the hydrocyclone (4). The intensity of the shear force is controlled by adjusting the stirring speed and the cone angle of the hydrocyclone. The upper part of the hydrocyclone (4) is provided with a short chain fatty acid concentrated solution injection port (403). After injection, a biochemical reaction is generated. Step 5: After the reaction, particles with good settling properties in the wastewater gather at the bottom of the hydrocyclone (4) and are pumped to the anoxic tank (1) and the aerobic tank (5). They are further circulated and reacted in the anoxic tank (1) until they reach the standard and settle.

2. The intelligent collaborative control method for aerobic granular sludge process according to claim 1, characterized in that, When the sludge concentration in the anoxic tank (1) is less than 3000 mg / L, the granular sludge at the bottom of the hydrocyclone (4) is pumped over to replenish the sludge concentration.

3. The intelligent collaborative control method for aerobic granular sludge process according to claim 1, characterized in that, Both the first precision aeration control system (205) and the second precision aeration control system (304) precisely control the DO concentration at 0.8-1.5 mg / L through the aeration control valve.

4. An intelligent collaborative control device for aerobic granular sludge processes, characterized in that, include: Anoxic tank (1), wherein a submersible agitator (101) and a sludge concentration meter (102) are provided in the anoxic tank (1). The granulation equipment (2) is provided with a guide plate (201), a first particle size analyzer (203), a first DO sensor (204) and a first precision aeration control system (205). The classifier device (3) is equipped with multi-stage screen plates, a second precision aeration control system (304), and a second DO sensor (305). The hydrocyclone (4) is equipped with a frequency converter (401), a second particle size analyzer (402), a short-chain fatty acid injection port (403) and a quick connector (404). The aerobic tank (5) receives the wastewater treated by the hydrocyclone (4); Sedimentation tank (6), wherein the sedimentation tank (6) separates the activated sludge carried in the effluent of the aerobic tank (5); Central controller (7), which receives real-time monitoring data from each unit; The anoxic tank (1), granulation equipment (2), classifier equipment (3), hydrocyclone (4), aerobic tank (5) and sedimentation tank (6) are connected in sequence.

5. The intelligent collaborative control device for aerobic granular sludge process according to claim 4, characterized in that, Multiple guide plates (201) that can rotate around an axis are set at different heights on the inner wall of the granulation equipment (2). The guide plates (201) are connected to waterproof servo motors (202), and the waterproof servo motors (202) are connected to central controllers (7).

6. The intelligent collaborative control device for aerobic granular sludge process according to claim 4, characterized in that, The granulation equipment (2) is equipped with a first precision aeration control system (205) at the bottom. The first precision aeration control system (205) includes a first DO sensor (204), an online gas flow meter, an aeration control valve and a multi-parameter controller. The aeration control valve and the multi-parameter controller are connected to the central controller (7). The granulation equipment (2) is equipped with an online first particle size analyzer (203) at the outlet.

7. The intelligent collaborative control device for aerobic granular sludge process according to claim 4, characterized in that, The classifier device (3) has multiple screens at different heights on its inner wall. The multiple screens include a first-level screen (301), a second-level screen (302), and a third-level screen (303). The screen aperture decreases from bottom to top.

8. The intelligent collaborative control device for aerobic granular sludge process according to claim 4, characterized in that, The classifier device (3) is equipped with a second precision aeration control system (304) at the bottom. The second precision aeration control system (304) includes a second DO sensor (305), an online gas flow meter, an aeration control valve and a multi-parameter controller. The aeration control valve and the multi-parameter controller are connected to the central controller (7).

9. The intelligent collaborative control device for aerobic granular sludge process according to claim 4, characterized in that, The hydrocyclone (4) is composed of multiple short cone segments with different cone angles connected in series by quick connectors (404), with a variable frequency stirrer (401) at the bottom, a short chain fatty acid injection port (403) on the side wall, and an online second particle size analyzer (402) inside or at the outlet.

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