A / o experimental teaching model device

Abstract

The utility model relates to water treatment teaching model technical field, concretely is a kind of A / O experimental teaching model equipment, including reaction main body, regulation and control component, monitoring component and auxiliary assembly, the regulation and control component is fixedly installed in reaction main body side direction, monitoring component is fixedly installed in reaction main body, reaction main body with the auxiliary assembly intercommunication, reaction main body includes the anaerobic pool, aerobic pool and sedimentation tank made of transparent material and communicated in proper order, first reflux pipe of intercommunication anaerobic pool is fixedly installed in aerobic pool, first pump body is fixedly installed on first reflux pipe, second reflux pipe of intercommunication anaerobic pool is fixedly installed in the sedimentation tank bottom, second pump body is fixedly installed on second reflux pipe;Solved the problem that student is difficult to observe and study the details of water treatment in classroom in real time.

Description

Technical Field

[0001] This utility model relates to the field of water treatment teaching model technology, specifically an A / O experimental teaching model device. Background Technology

[0002] In the field of environmental engineering and wastewater treatment education, the A / O (anaerobic / aerobic) process, as a core technology for nitrogen and phosphorus removal, is a key knowledge point that must be taught in environmental courses. However, this process involves complex principles such as microbial metabolism, material transformation, and parameter control, making it difficult for students to gain an intuitive understanding using traditional teaching methods. Currently, there are three main known teaching solutions for the A / O process.

[0003] The first type relies on on-site internships at wastewater treatment plants, allowing students to understand the technological process by visiting large structures. However, this method has significant limitations: the reaction tanks in large wastewater treatment plants are mostly enclosed civil engineering structures, making it impossible for students to observe details such as the flow of mixed liquor and the distribution of microorganisms; moreover, parameter adjustments during operation are limited by production load, making it difficult to demonstrate variables to meet teaching needs. As a result, students' understanding of core reactions such as "anaerobic phosphorus release to aerobic phosphorus uptake" and "nitrification to denitrification" remains at the theoretical level. The second category uses static teaching aids, such as process flow diagrams and PowerPoint presentations. While these tools can demonstrate the equipment structure, they cannot simulate dynamic reaction processes, making it difficult for students to understand the impact of parameters such as DO concentration and sludge age on treatment effectiveness. For example, a patent-disclosed "Urban Wastewater Treatment Demonstration Device" (patent number CN2904175Y) only demonstrates the process through static pipeline connections, failing to reflect real-time changes in water quality indicators, resulting in a severe lack of interactivity and practical application. The third category is small-scale laboratory-scale reactors, and some universities have attempted to build simple devices for teaching. However, existing devices have obvious drawbacks: first, they lack system integration, with anaerobic tanks, aerobic tanks, sedimentation tanks, and other units being mostly decentralized devices, making it difficult to simulate a complete process chain; second, monitoring methods are outdated, requiring manual sampling and testing of water quality, and cannot provide real-time feedback on reaction effects; and third, they are complex to operate, posing a high barrier to entry for non-specialist students.

[0004] Therefore, this utility model provides an A / O experimental teaching model device to solve the above problems. Utility Model Content

[0005] The technical problem this invention aims to solve is that it is difficult for students to conduct real-time observation and research on the details of water treatment in the classroom.

[0006] This utility model provides the following technical solution: an A / O experimental teaching model device, including a reaction body, a control component, a monitoring component, and an auxiliary component. The control component is fixedly installed on the side of the reaction body, and the monitoring component is fixedly installed inside the reaction body. The reaction body is connected to the auxiliary component. The reaction body includes an anaerobic tank, an aerobic tank, and a sedimentation tank made of transparent material, which are connected in sequence. A first reflux pipe connected to the anaerobic tank is fixedly installed inside the aerobic tank, and a first pump body is fixedly installed on the first reflux pipe. A second reflux pipe connected to the anaerobic tank is fixedly installed at the bottom of the sedimentation tank, and a second pump body is fixedly installed on the second reflux pipe.

[0007] The auxiliary components include a water storage tank and a purified water tank. The water storage tank is connected to the anaerobic tank, and the purified water tank is connected to the sedimentation tank. Both the water storage tank and the purified water tank are fixed by brackets.

[0008] A sealing cover is fixedly installed on the top of the anaerobic tank. An installation hole is opened in the middle of the sealing cover, and a stirring body is installed in the installation hole.

[0009] The anaerobic tank has an inlet at the bottom, and a first connecting pipe is fixedly installed at the inlet. The other end of the first connecting pipe is connected to a third pump body, which is located inside the water storage tank. A second connecting pipe is fixedly installed on the side of the anaerobic tank, which is connected to the aerobic tank.

[0010] A first flow meter is fixedly installed at the liquid inlet.

[0011] The aerobic tank is uniformly and fixedly installed with aeration gas at the bottom. The other end of the aeration gas is connected to an air compressor. A second flow meter and a solenoid valve are fixedly installed on the aeration gas.

[0012] A third connecting pipe is installed in the center of the sedimentation tank, which is connected to the aerobic tank. A sludge hopper is fixedly installed at the bottom of the sedimentation tank. A second return pipe is fixedly installed at the bottom of the sludge hopper. A triangular effluent weir is fixedly installed at the top of the sedimentation tank. A fourth connecting pipe is fixedly connected to the triangular effluent weir. The other end of the fourth connecting pipe is connected to the purified water tank.

[0013] The first, second, third, and fourth connecting pipes are all made of transparent materials such as plexiglass or PVC.

[0014] The control component includes a controller, which is connected to the agitator, air compressor, solenoid valve, first pump body, second pump body and third pump body via cables.

[0015] The beneficial effects of this utility model are as follows: 1. This utility model overcomes the problems in existing technologies where teaching A / O processes relies on large-scale wastewater treatment plant site visits, making it difficult for students to observe reaction details up close, and traditional teaching aids cannot present the real-time material transformation process. This allows students to fully track the purification trajectory of wastewater from the anaerobic tank to the aerobic tank in a laboratory environment, and intuitively understand the relationship between changes in the microbial community and the degradation of pollutants.

[0016] 2. This utility model solves the limitations of traditional teaching equipment where reaction conditions are fixed and students cannot independently explore the influence of variables. It enables learners to observe the dynamic changes of indicators such as COD and ammonia nitrogen in real time by adjusting key parameters such as DO concentration and sludge return ratio, gain a deeper understanding of the control mechanism of process parameters on treatment effect, and significantly improve their in-depth understanding of the A / O process principle.

[0017] 3. This utility model makes up for the shortcomings of existing teaching methods, such as the abstract process flow and the difficulty in breaking down and observing the reactions at each stage. It allows students to clearly see the phosphorus release process in the anaerobic stage and the phosphorus absorption and nitrification reactions in the aerobic stage, intuitively distinguish the working principles of different functional zones, effectively reduce the difficulty of understanding complex processes, and enhance the intuitiveness and interactivity of the teaching process.

[0018] 4. This invention overcomes the problems of traditional large-scale experimental equipment, such as large footprint, high maintenance costs, and difficulty in widespread classroom application. It achieves portability and low cost of the teaching model, enabling A / O process experiments to be easily integrated into classroom teaching, allowing more students to have hands-on experience, and significantly improving the accessibility and effectiveness of practical teaching. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] In the diagram: 1. Anaerobic tank; 11. Sealing cover; 12. Mixing body; 13. Third pump body; 2. Aerobic tank; 21. First return pipe; 22. First pump body; 3. Sedimentation tank; 31. Second return pipe; 32. Second pump body; 33. Sludge hopper; 34. Triangular effluent weir; 4. Water storage tank; 41. Clean water tank; 5. First connecting pipe; 51. Second connecting pipe; 52. Third connecting pipe; 53. Fourth connecting pipe; 6. First flow meter; 7. Aeration gas; 71. Air compressor; 72. Second flow meter; 8. Controller. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely represents some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is conventionally placed during use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0025] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] To address the problem that students often find it difficult to conduct real-time observation and research on the details of water treatment in the classroom, this disclosure provides an A / O experimental teaching model device. Example

[0027] An A / O experimental teaching model device includes a reaction body, a control component, a monitoring component, and an auxiliary component. The control component is fixedly installed on the side of the reaction body, and the monitoring component is fixedly installed inside the reaction body. The reaction body is connected to the auxiliary component. The reaction body includes an anaerobic tank 1, an aerobic tank 2, and a sedimentation tank 3, which are made of transparent material and are connected in sequence. A first return pipe 21 connected to the anaerobic tank 1 is fixedly installed inside the aerobic tank 2, and a first pump body 22 is fixedly installed on the first return pipe 21. A second return pipe 31 connected to the anaerobic tank 1 is fixedly installed at the bottom of the sedimentation tank 3, and a second pump body 32 is fixedly installed on the second return pipe 31.

[0028] In this embodiment, the anaerobic tank 1, the aerobic tank 2, and the sedimentation tank 3 are separate units connected in series by pipes.

[0029] The transparent material is a high-transmittance material, such as plexiglass, PVC, PC, or transparent acrylic sheet.

[0030] In this embodiment, the anaerobic tank 1 is made of plexiglass and has a capacity of 5-10L. The aerobic tank 2 is also made of plexiglass and has a volume 1.5-2 times that of the anaerobic tank 1. The sedimentation tank 3 has a vertical flow structure and a height 1.2-1.5 times its diameter.

[0031] It should be noted that, in order to improve safety, acrylic glass can be replaced with explosion-proof glass, or an additional layer of explosion-proof glass can be added to the outside of acrylic glass for protection.

[0032] It should also be noted that, in the embodiments of this disclosure, in addition to being made of highly transparent or light-transmitting material as a whole, the anaerobic tank 1, aerobic tank 2 and sedimentation tank 3 can also be made of highly transparent or light-transmitting material on one or several sides.

[0033] The auxiliary component stores simulated wastewater, which is sequentially transported to anaerobic tank 1, aerobic tank 2, and sedimentation tank 3. This simulates the wastewater treatment process and its details. The transparent materials used in the anaerobic tank 1, aerobic tank 2, and sedimentation tank 3 facilitate student observation and learning. Students can track the entire purification trajectory of wastewater from anaerobic tank 1 to aerobic tank 2 in a laboratory environment, intuitively understanding the relationship between microbial community changes and pollutant degradation. Simultaneously, the detection component monitors various parameters within the reaction module, and the control component regulates these parameters, allowing students to independently explore the influence of variables. Learners can adjust key parameters such as DO concentration and sludge return ratio to observe the dynamic changes in indicators such as COD and ammonia nitrogen in real time, gaining a deeper understanding of the control mechanism of process parameters on treatment effects and significantly enhancing their understanding of the A / O process principles.

[0034] The first pump body 22 and the second pump body 32 can return and transport the sludge in the aerobic tank 2 and the sedimentation tank 3 to the anaerobic tank 1. This can replenish the lost microorganisms in the anaerobic tank 1 to maintain biological activity, and also enhance the denitrification effect and realize the recycling of polyphosphate bacteria.

[0035] The auxiliary components include a water storage tank 4 and a purified water tank 41. The water storage tank 4 is connected to the anaerobic tank 1, and the purified water tank 41 is connected to the sedimentation tank 3. Both the water storage tank 4 and the purified water tank 41 are fixed by brackets to maintain stability.

[0036] The water storage tank 4 contains simulated wastewater, and the purified water tank 41 contains treated purified water. The simulated wastewater in the water storage tank 4 is sequentially transported to the anaerobic tank 1, the aerobic tank 2, and the sedimentation tank 3 for treatment, and finally purified and transported to the purified water tank.

[0037] A sealing cover plate 11 is fixedly installed on the top of the anaerobic tank 1. An installation hole is opened in the middle of the sealing cover plate 11, and a stirring body 12 is installed in the installation hole.

[0038] The sealing cover 11 installed on the top of the anaerobic tank 1 can maintain the airtightness while being small and integrated, which is convenient for personnel to learn and study, thereby ensuring the effect of anaerobic treatment. It also works with the agitator 12 to stir during the anaerobic treatment process, which facilitates personnel to study and learn about the mechanism of anaerobic treatment.

[0039] The stirring body 12 is a conventional stirrer that is vertically inserted into the middle of the tank, such as a conventional stirring shaft and stirring blades, and is connected to an external motor via a coupling. The external motor has a power of 50-100W. A three-bladed impeller is installed at the end of the stirring shaft, and the diameter of the impeller is 1 / 3 of the diameter of the tank.

[0040] The agitator 12 can also employ existing submersible jet mixers, or any other structure or device for agitating liquids.

[0041] It should be noted that by adjusting the motor speed to control the stirring rate, it is easier for personnel to independently explore the influence of variables.

[0042] The anaerobic tank 1 has an inlet at the bottom, and a first connecting pipe 5 is fixedly installed at the inlet. The other end of the first connecting pipe 5 is connected to a third pump body 13. The first pump body 22 is located inside the water storage tank 4. A second connecting pipe 51 connected to the aerobic tank 2 is fixedly installed on the side of the anaerobic tank 1.

[0043] The third pump 13 can transport the simulated sewage liquid in the water storage tank 4 to the anaerobic tank 1 for anaerobic treatment along the first connecting pipe 5, and after the anaerobic treatment is completed, it can be transported to the aerobic tank 2 for aerobic treatment along the second connecting pipe 51.

[0044] A first flow meter 6 is fixedly installed at the liquid inlet. The first flow meter 6 is an existing rotor flow meter or electromagnetic flow meter, which makes it easy to measure the liquid. In conjunction with the control component and the third pump body 13, it can also control the influent flow rate in the anaerobic tank 1, which is convenient for scholars to study.

[0045] It should be noted that the first flow meter 6 can also employ other structures or devices for measuring fluids. The control system between the first flow meter 6, the control assembly, and the third pump body 13 is a mature existing technology, and will not be elaborated upon further.

[0046] Aeration gas 7 is uniformly and fixedly installed at the bottom of the aerobic tank 2. The other end of the aeration gas 7 is connected to an air compressor 71. A second flow meter 72 and a solenoid valve are fixedly installed on the aeration gas 7.

[0047] Air is supplied to the aeration gas 7 by the air compressor 71, and the aeration volume is controlled by the interaction of the control component, the second flow meter 72 and the solenoid valve, thereby ensuring the stable operation of the aerobic treatment.

[0048] It should be noted that the control system of the regulating component, the second flow meter 72, and the solenoid valve to control the aeration gas 7 is a mature existing technology, which will not be elaborated on further.

[0049] The second flow meter 72 uses an existing gas flow meter, such as a thermal gas mass flow meter, a vortex flow meter, or a rotor flow meter.

[0050] The aeration gas 7 includes a main air pipe, branch pipes and aeration heads. The main air pipe is fixedly installed at the bottom of the aerobic tank 2. The main air pipe is fixedly connected to the air compressor 71. Multiple branch pipes are evenly connected to the main air pipe. Aeration heads are fixedly installed at the other end of the branch pipes.

[0051] Air compressor 71 delivers air to the main air pipe. The air in the main air pipe passes through multiple branch pipes and is evenly delivered to the interior of the aerobic tank 2 by multiple aeration heads, thereby ensuring the stability of aerobic treatment.

[0052] In this embodiment of the present disclosure, 6 to 8 aeration heads are uniformly fixed on the main air pipe.

[0053] A third connecting pipe 52, which connects to the aerobic tank 2, is installed in the center of the sedimentation tank 3. A sludge hopper 33 is fixedly installed at the bottom of the sedimentation tank 3. A second return pipe 31 is fixedly installed at the bottom of the sludge hopper 33. A triangular effluent weir 34 is fixedly installed at the top of the sedimentation tank 3. A fourth connecting pipe 53 is fixedly connected to the triangular effluent weir 34. The other end of the fourth connecting pipe 53 is connected to the purified water tank 41.

[0054] The sedimentation tank 3 removes suspended particles from the water through gravity settling, allowing pure water to pass through the triangular outlet weir 34 and be transported to the clean water tank 41 along the fourth connecting pipe 53. The sludge in the tank settles into the sludge hopper 33 and is transported to the anaerobic tank 1 along the second return pipe 31, thereby replenishing the bacteria lost in the anaerobic tank 1.

[0055] The first connecting pipe 5, the second connecting pipe 51, the third connecting pipe 52 and the fourth connecting pipe 53 are all made of transparent materials such as plexiglass or PVC.

[0056] The transparent first connecting pipe 5, second connecting pipe 51, third connecting pipe 52 and fourth connecting pipe 53 make it easier for scholars to track the wastewater treatment trajectory, intuitively understand the effect of changes in microbial communities and pollutant degradation, intuitively distinguish the working principles of different functional areas, effectively reduce the difficulty of understanding complex processes, and enhance the intuitiveness and interactivity of the teaching process.

[0057] The control component includes a controller 8, which is connected to the agitator 12, air compressor 71, solenoid valve, first pump body 22, second pump body 32 and third pump body 13 via cables.

[0058] The controller 8 is an existing PLC controller 8, which adjusts parameters such as stirring rate, influent flow rate, aeration rate, and reflux ratio in real time.

[0059] The PLC controller 8 is selected from Siemens S7-1200 series or a domestically produced controller with equivalent functions.

[0060] The control component also includes a touch screen, which communicates with the PLC controller 8 via Ethernet. Personnel can use the touch screen in conjunction with the PLC controller 8 to display and adjust various parameters in real time.

[0061] Anaerobic tank 1 is equipped with a pH sensor with a measurement range of 0–14 and an ORP sensor with a measurement range of ~1000–+1000 mV. Aerobic tank 2 is equipped with a DO sensor with a measurement range of 0–20 mg / L and a COD sensor with a measurement range of 0–1000 mg / L. The effluent outlet of sedimentation tank 3 is equipped with a turbidity sensor with a measurement range of 0–1000 NTU. All sensors are connected to a data acquisition card via signal lines. The data acquisition card has a sampling frequency of 1–10 Hz and communicates with the PLC controller 8 to achieve real-time data acquisition and display.

[0062] The process of simulating wastewater treatment for experimental teaching in this embodiment is as follows: The controller 8 starts the third pump 13, thereby transporting the simulated sewage liquid in the water storage tank 4 to the anaerobic tank 1 along the first connecting pipe 5. At the same time, the controller 8 starts to control the agitator 12 to rotate for anaerobic treatment.

[0063] After anaerobic treatment, the liquid enters the aerobic tank 2 along the second connecting pipe 51. The air compressor 71 is started and oxygen is supplied to the aerobic tank 2 through the aeration components for aerobic treatment. The sewage in the aerobic tank 2 enters the sedimentation tank 3 along the second connecting pipe 51 for sedimentation. At the same time, the sludge in the aerobic tank 2 can be returned to the anaerobic tank 1 through the first return pipe 21 and the first pump body 22, thereby replenishing the sludge and bacteria lost in the anaerobic tank 1.

[0064] Wastewater in aerobic tank 2 enters the sedimentation tank along the second connecting pipe 51 for sedimentation. After sedimentation, the purified water is transported to the purified water tank 41 through the triangular outlet weir 34 and the fourth connecting pipe 53 to complete water treatment. The sludge that settles to the bottom flows back to anaerobic tank 1 along the second return pipe 31 and the second pump body 32, thereby further replenishing the sludge and bacteria lost in anaerobic tank 1.

[0065] Example 2: Based on Example 1 above, this embodiment only describes the differences, and the similarities will not be repeated.

[0066] In this embodiment, a single tank is used to separate an anaerobic zone, an aerobic zone, and a sedimentation zone by a partition. A water flow channel is reserved at the bottom of the partition, and the cross-sectional area of ​​the reserved water flow channel is 1 / 5 to 1 / 4 of the cross-sectional area of ​​the tank. This can reduce the equipment footprint and simulate a continuous flow state.

[0067] The tanks in the anaerobic, aerobic, and sedimentation zones are made of high-transmittance PC panels with a thickness of 5-8mm to meet the needs of visual teaching.

[0068] Sedimentation tank 3 is a horizontal flow sedimentation tank 3, the length of which is 3 to 5 times the width, the bottom is sloped at 0.01 to 0.02, and a sludge hopper 33 is installed at the end. The surface load is controlled at 1 to 3 m³ / (m²・h). By changing the sedimentation form, students can compare the differences between different sedimentation processes without affecting the sludge return function.

[0069] Example 3: Based on Example 2 above, this embodiment only describes the differences, and the similarities will not be repeated.

[0070] The mechanical agitator in anaerobic tank 1 can be replaced by a circulating water pump with a flow rate of 10-20 L / h. Mixing is achieved through water circulation within the tank. The water pump inlet is located at the bottom of the tank, and the outlet is located 10-15 cm below the liquid surface, forming vertical convection.

[0071] The aeration head and air compressor 71 of aerobic tank 2 can be replaced with a jet aeration device, which consists of a jet aerator and a submersible pump. It draws in air through high-speed water flow to form a gas-liquid mixture. The aeration efficiency can be controlled by adjusting the power of the water pump. It is suitable for scenarios where the air circuit design needs to be simplified.

[0072] Example 4: Based on Example 3 above, this embodiment only describes the differences, and the similarities will not be repeated.

[0073] The PLC controller 8 can be replaced with a microcontroller control system, such as the Arduino Mega2560 or STM32 series, to control the switching of motors and water pumps in conjunction with existing relay modules. It can also be paired with a touch screen module, such as a TFT LCD screen, to complete parameter settings. This can reduce costs by 30% to 50%, making it suitable for teaching scenarios with limited budgets.

[0074] In addition to Ethernet, data transmission can also be achieved using Bluetooth or Wi-Fi modules such as the ESP8266, supporting remote monitoring via a mobile app and enhancing operational flexibility. The online COD sensor can be replaced with a sampling and detection assembly, including an automatic sampling pump and cuvette holder. The automatic sampling pump samples every 10–30 minutes, enabling semi-automatic monitoring in conjunction with a portable COD analyzer. The DO sensor uses either a polarographic or fluorescence sensor; both types can meet measurement requirements from 0–20 mg / L, and the choice can be made based on maintenance costs.

[0075] Example 5: Based on Example 4 above, this embodiment only describes the differences, and the similarities will not be repeated.

[0076] In this embodiment, the reaction body consists of an anaerobic tank 1, an aerobic tank 2, and a sedimentation tank 3, which can be installed or disassembled independently. They are connected to each other by quick-connect flanges, and the sealing gaskets are made of nitrile rubber, which facilitates quick disassembly and reassembly.

[0077] The independently installed or disassembled anaerobic tank 1, aerobic tank 2, and sedimentation tank 3 facilitate comparison or research of different processes by personnel and scholars. For example, the vertical flow sedimentation tank 3 can be replaced with a horizontal flow sedimentation tank 3 to compare the differences between different sedimentation processes, or the combination of aeration head and air compressor 71 can be replaced with a jet aeration device. This allows students to observe and learn while comparing the effects of different water treatment environments in a laboratory setting. It also allows students to independently explore the influence of variables and significantly improve their in-depth understanding of the A / O process principle.

[0078] The control components adopt distributed control, that is, each of the anaerobic tank 1, aerobic tank 2 and sedimentation tank 3 is equipped with an independent controller 8, which is coordinated through RS485 bus.

[0079] The monitoring system can be integrated with a simple water quality test strip trough, allowing students to intuitively judge water quality changes by comparing the color of the test strips. It complements online sensor data and is suitable for basic teaching scenarios.

[0080] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An A / O experimental teaching model device, comprising a reaction body, a control component, a monitoring component, and an auxiliary component, characterized in that: A control component is fixedly installed on the side of the reaction body, and a monitoring component is fixedly installed inside the reaction body. The reaction body is connected to the auxiliary component. The reaction body includes an anaerobic tank (1), an aerobic tank (2), and a sedimentation tank (3) made of transparent material, which are connected in sequence. A first return pipe (21) connected to the anaerobic tank (1) is fixedly installed inside the aerobic tank (2). A first pump body (22) is fixedly installed on the first return pipe (21). A second return pipe (31) connected to the anaerobic tank (1) is fixedly installed at the bottom of the sedimentation tank (3). A second pump body (32) is fixedly installed on the second return pipe (31).

2. The A / O experimental teaching model device according to claim 1, characterized in that: The auxiliary components include a water storage tank (4) and a water purification tank (41). The water storage tank (4) is connected to the anaerobic tank (1), and the water purification tank (41) is connected to the sedimentation tank (3). Both the water storage tank (4) and the water purification tank (41) are fixed by brackets.

3. The A / O experimental teaching model device according to claim 2, characterized in that: The anaerobic tank (1) is fixedly installed with a sealing cover plate (11), and an installation hole is opened in the middle of the sealing cover plate (11), and a stirring body (12) is installed in the installation hole.

4. The A / O experimental teaching model device according to claim 3, characterized in that: The anaerobic tank (1) has an inlet at the bottom, and a first connecting pipe (5) is fixedly installed at the inlet. The other end of the first connecting pipe (5) is connected to a third pump body (13). The first pump body (22) is located inside the water storage tank (4). A second connecting pipe (51) connected to the aerobic tank (2) is fixedly installed on the side of the anaerobic tank (1).

5. The A / O experimental teaching model device according to claim 4, characterized in that: A first flow meter (6) is fixedly installed at the liquid inlet.

6. The A / O experimental teaching model device according to claim 5, characterized in that: The aerobic tank (2) has an aeration gas (7) uniformly fixedly installed at the bottom. The other end of the aeration gas (7) is connected to an air compressor (71). A second flow meter (72) and a solenoid valve are fixedly installed on the aeration gas (7).

7. The A / O experimental teaching model device according to claim 6, characterized in that: The sedimentation tank (3) is equipped with a third connecting pipe (52) that connects to the aerobic tank (2) in the center. A sludge hopper (33) is fixedly installed at the bottom of the sedimentation tank (3). A second return pipe (31) is fixedly installed at the bottom of the sludge hopper (33). A triangular effluent weir (34) is fixedly installed at the top of the sedimentation tank (3). A fourth connecting pipe (53) is fixedly connected to the triangular effluent weir (34). The other end of the fourth connecting pipe (53) is connected to the water purification tank (41).

8. The A / O experimental teaching model device according to claim 7, characterized in that: The first connecting pipe (5), the second connecting pipe (51), the third connecting pipe (52) and the fourth connecting pipe (53) are all made of transparent materials such as plexiglass or PVC.

9. The A / O experimental teaching model device according to claim 8, characterized in that: The control component includes a controller (8), which is connected to the agitator (12), air compressor (71), solenoid valve, first pump body (22), second pump body (32) and third pump body (13) via cables.

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