Intelligent control system and method for treating domestic sewage and initial rainwater

Abstract

The application discloses a kind of intelligent regulation and control domestic sewage and initial rainwater collaborative processing system and method, comprising: S1, seriously polluted initial rainwater is separated from clean middle and late rainwater, and initial rainwater is guided to regulation and storage pool;S2, seriously polluted initial rainwater is stored in the regulation and storage pool, and water quantity and water quality are homogenized;S3, after homogenization, initial rainwater is directly introduced into the end of sewage treatment system, i.e.biochemical treatment unit;S4, introduced initial rainwater and domestic sewage from the front end of sewage treatment system are fully mixed in biochemical treatment unit, after experiencing nitrification, denitrification and organic matter degradation process, enter subsequent secondary sedimentation tank for mud-water separation, and the supernatant obtained by precipitation is discharged or reused after disinfection;By directly introducing initial rainwater into biochemical treatment unit, it avoids ineffective circulation in front-end physical treatment unit, and fully utilizes the powerful pollutant degradation capacity of biochemical treatment unit.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an intelligent control system and method for the coordinated treatment of domestic sewage and initial rainwater. Background Technology

[0002] With the acceleration of urbanization, non-point source pollution has become one of the major causes of water environment deterioration. Among these, initial rainwater carries a large amount of pollutants after washing over the surface, resulting in a high pollution load. Direct discharge of this water has a far greater impact on receiving water bodies than domestic sewage, necessitating effective treatment. Therefore, how to efficiently and economically treat initial rainwater and coordinate its treatment with domestic sewage is key to achieving non-point source pollution control and resource utilization.

[0003] In the field of urban drainage and sewage treatment, efficient and economical treatment of initial rainwater and domestic sewage is key to achieving non-point source pollution control and resource utilization. However, existing rainwater and sewage treatment technologies, especially those incorporating initial rainwater into sewage treatment systems, have the following significant drawbacks:

[0004] 1. Lengthy processing flow and serious waste of resources: Existing technologies usually combine the collected initial rainwater with domestic sewage and enter it from the beginning of the sewage treatment system to complete all the treatment processes. This means that the pollutants in the initial rainwater need to go through the front-end unit that is designed for high-concentration domestic sewage, which occupies a large amount of pretreatment and biochemical treatment capacity, resulting in huge waste of energy and treatment resources.

[0005] 2. Lack of intelligent control and low operational efficiency: Existing systems mostly adopt extensive management of initial rainwater inflow, lacking real-time monitoring and intelligent control strategies based on water quality and quantity. They cannot dynamically adjust the inflow point and flow rate of initial rainwater according to the real-time operating conditions of the wastewater treatment system, which can easily impact the biological system, affecting stable operation. Furthermore, the level of automation is low, relying heavily on manual experience. Summary of the Invention

[0006] In order to solve the problems of the existing technology that simply combines initial rainwater and domestic sewage and enters them from the beginning of the sewage treatment system, resulting in a lengthy process, large pretreatment load, high energy consumption and resource waste, this invention provides an efficient, energy-saving integrated treatment method for domestic sewage and initial rainwater that can make full use of the treatment capacity of existing facilities.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0008] A method for the coordinated treatment of domestic sewage and initial rainwater with intelligent regulation includes the following steps:

[0009] S1. Separate heavily polluted initial rainwater from clean mid-to-late rainwater, and divert the initial rainwater to a storage tank.

[0010] S2. Store the heavily polluted initial rainwater in the regulating tank to equalize the water quantity and quality;

[0011] S3. The homogenized initial rainwater is directly introduced into the end of the sewage treatment system, namely the biological treatment unit.

[0012] S4. The initial rainwater introduced is fully mixed with domestic sewage from the front end of the sewage treatment system in the biological treatment unit. After undergoing nitrification, denitrification and organic matter degradation processes, it enters the subsequent secondary sedimentation tank for sludge-water separation. The supernatant obtained from the sedimentation is disinfected and discharged or reused after meeting the standards.

[0013] Furthermore, in step S1, the heavily polluted initial rainwater and the clean mid-to-late stage rainwater are separated by a diversion device to separate the heavily polluted initial rainwater from the clean mid-to-late stage rainwater.

[0014] Furthermore, in step S3, the initial rainwater after homogenization is transported by a pump and a pipeline, bypassing the pretreatment unit and primary sedimentation tank of the sewage treatment system, and enters the biochemical treatment unit.

[0015] Furthermore, the biochemical treatment unit includes a first bioreactor, a second bioreactor, and a third bioreactor;

[0016] The first, second, and third bioreactors each include an anoxic tank and an aerobic tank. The biochemical treatment unit in step S3 is introduced into the anoxic tank of the third bioreactor. The anoxic tank is equipped with a monitoring device to adjust the start / stop and flow rate of the delivery pump in real time based on the nitrate concentration in the anoxic tank or the dissolved oxygen concentration at the end of the aerobic tank connected to the anoxic tank.

[0017] Furthermore, the diversion device includes an electric diversion valve, the inlet end of which is connected to a rainwater culvert, and the outlet end of which is connected to a storage tank. A horizontal grid for intercepting large floating objects is installed near the inlet end of the storage tank, and a water pump is installed at the end of the storage tank. The outlet end of the water pump is connected to a conveying pipeline to transport the rainwater in the storage tank to the biochemical treatment unit of the sewage treatment system.

[0018] Furthermore, the monitoring device includes an online nitrate monitor installed in the anoxic tank and an online dissolved oxygen monitor installed in the aerobic tank. Both the online nitrate monitor and the online dissolved oxygen monitor are communicatively connected to the control system.

[0019] Furthermore, the first screen is installed between the inlet pumping station and the sewage culvert, and a first valve is installed between the sewage culvert and the first screen. The inlet pumping station is connected to the aerated grit chamber. The second screen is installed between the inlet pumping station and the aerated grit chamber, and a second valve is installed between the second screen and the inlet pumping station. The aerated grit chamber is connected to the first biological reactor, and a third valve is installed between the aerated grit chamber and the first biological reactor.

[0020] Furthermore, the control system is communicatively connected to the delivery pump, the electric diversion valve, the first valve, the second valve, the third valve, and the valves on the delivery pipeline.

[0021] A smart, regulated system for the coordinated treatment of domestic sewage and initial rainwater includes a data acquisition module, a judgment module, a control signal generation module, an equipment control module, and a protection module.

[0022] The data acquisition module acquires the detection signals of key water quality parameters from the monitoring device in real time.

[0023] The judgment module determines whether the process conditions for introducing initial rainwater are met based on the data collected by the data acquisition module.

[0024] The control signal generation module calculates the water pump and valve adjustment control commands when the judgment module determines that the introduction of initial rainwater is permissible.

[0025] The equipment control module receives adjustment and control commands generated by the control signal generation module and directly drives field equipment, including water pumps and valves, to perform actions.

[0026] The protection module monitors the safety status and enforces shutdown protection in abnormal situations.

[0027] Furthermore, the wastewater treatment system also includes a first screen, a second screen, and an aerated grit chamber. The first screen, the second screen, and the aerated grit chamber, together with the first biological reactor and the second biological reactor, constitute the pretreatment unit of the wastewater treatment system.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] This invention directly introduces initial rainwater into the biochemical treatment unit, avoiding its ineffective circulation in the front-end physical treatment unit. It fully utilizes the powerful pollutant degradation capacity of the biochemical treatment unit, shortens the treatment path, and thus significantly improves the overall plant's treatment efficiency for initial rainwater. Since the initial rainwater skips the pretreatment and primary sedimentation tanks, which have high lifting heights and high energy consumption, the overall lifting and stirring energy consumption of the system is significantly reduced. At the same time, this invention makes full use of the design margin of the biochemical system, avoiding the investment and operating costs of expanding the front-end facilities to treat initial rainwater, thus achieving energy conservation and consumption reduction.

[0030] This invention fundamentally reduces the processing pressure and wear of pretreatment facilities such as bar screens, grit chambers, and primary sedimentation tanks, reduces the maintenance frequency of these units and the amount of sludge transported, and extends the service life of the equipment. When the initial rainwater is preferably introduced into the anoxic tank, the organic matter contained therein can serve as a valuable carbon source for denitrification. This not only removes pollutants from the rainwater but also improves the denitrification efficiency of the entire wastewater treatment system, achieving "treating waste with waste".

[0031] Furthermore, the introduction of online monitoring and automatic control systems has enabled precise management of the rainwater introduction process, ensuring that the sewage treatment system is always in optimal operating condition, effectively avoiding water volume and quality fluctuations, guaranteeing stable compliance of effluent quality, and reducing the intensity of manual management. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the wastewater treatment system in this invention;

[0033] Figure 2 This is a schematic diagram of the process of a smart control system and method for the coordinated treatment of domestic sewage and initial rainwater according to the present invention.

[0034] Figure 3 This is a framework diagram of the control system in this invention. Detailed Implementation

[0035] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0036] like Figure 1-3 As shown, this embodiment provides an intelligent control system and method for the coordinated treatment of domestic sewage and initial rainwater, including the following steps:

[0037] S1. Separate heavily polluted initial rainwater from clean mid-to-late rainwater, and divert the initial rainwater to a storage tank.

[0038] S2. Store the heavily polluted initial rainwater in the regulating tank to equalize the water quantity and quality;

[0039] S3. The homogenized initial rainwater is directly introduced into the end of the sewage treatment system, namely the biological treatment unit.

[0040] S4. The initial rainwater introduced is fully mixed with domestic sewage from the front end of the sewage treatment system in the biological treatment unit. After undergoing nitrification, denitrification and organic matter degradation processes, it enters the subsequent secondary sedimentation tank for sludge-water separation. The supernatant obtained from the sedimentation is disinfected and discharged or reused after meeting the standards.

[0041] This embodiment introduces initial rainwater directly into the biochemical treatment unit, avoiding its ineffective circulation in the front-end physical treatment unit, making full use of the biochemical treatment unit's powerful pollutant degradation capabilities, shortening the treatment path, and thus significantly improving the plant's overall efficiency in treating initial rainwater.

[0042] Furthermore, in step S1, the heavily polluted initial rainwater and the clean mid-to-late stage rainwater are separated by a diversion device to separate the heavily polluted initial rainwater from the clean mid-to-late stage rainwater.

[0043] Furthermore, in step S3, the initial rainwater after homogenization is transported by a pump and a pipeline, bypassing the pretreatment unit and primary sedimentation tank of the sewage treatment system, and enters the biochemical treatment unit.

[0044] Furthermore, the biochemical treatment unit includes a first bioreactor, a second bioreactor, and a third bioreactor;

[0045] The first, second, and third bioreactors each include an anoxic tank and an aerobic tank. The biochemical treatment unit in step S3 is introduced into the anoxic tank of the third bioreactor. The anoxic tank is equipped with a monitoring device to adjust the start / stop and flow rate of the delivery pump in real time based on the nitrate concentration in the anoxic tank or the dissolved oxygen concentration at the end of the aerobic tank connected to the anoxic tank.

[0046] The pump provides energy to the rainwater stored in the low-lying storage tank, lifting it and transporting it to the higher-level biochemical treatment unit. The valves on the transport pipeline are electric regulating valves, which close quickly in case of emergency shutdown of the system. They work in conjunction with the pumps to form a double protection, preventing rainwater from continuing to enter the biochemical tank.

[0047] Furthermore, the diversion device includes an electric diversion valve, the inlet end of which is connected to a rainwater culvert, and the outlet end of which is connected to a storage tank. A horizontal grid for intercepting large floating objects is installed near the inlet end of the storage tank, and a water pump is installed at the end of the storage tank. The outlet end of the water pump is connected to a conveying pipeline to transport the rainwater in the storage tank to the biochemical treatment unit of the sewage treatment system.

[0048] Specifically, in the early stages of rainfall, the electric diversion valve switches to the path leading to the storage tank, intercepting the heavily polluted initial rainwater; in the later stages of rainfall, it switches to the path for direct discharge or reuse, releasing the clean mid-to-late-stage rainwater, ensuring that only the initial rainwater with a high pollution load enters the subsequent treatment process.

[0049] Furthermore, the monitoring device includes an online nitrate monitor installed in the anoxic tank and an online dissolved oxygen monitor installed in the aerobic tank. Both the online nitrate monitor and the online dissolved oxygen monitor are communicatively connected to the control system.

[0050] The online nitrate monitor monitors the nitrate concentration in the third-stage anoxic pool in real time. Specifically, it usually uses ion-selective electrode method or ultraviolet spectroscopy. The sensor converts the nitrate concentration information in the water sample into a measurable electrical signal, which is then processed by the transmitter and output as a standard signal to the control system.

[0051] Dissolved oxygen online monitoring instruments monitor the dissolved oxygen concentration at the end of the aerobic pool in real time. Specifically, fluorescence or polarography methods are usually used. The fluorescent material or electrode on the surface of the sensor probe reacts with dissolved oxygen in the water in a specific way, causing changes in optical properties or current. These changes are proportional to the dissolved oxygen concentration and are converted to output a standard signal.

[0052] Furthermore, the wastewater treatment system also includes a first screen, a second screen, and an aerated grit chamber. The first screen, the second screen, and the aerated grit chamber, together with the first biological reactor and the second biological reactor, constitute the pretreatment unit of the wastewater treatment system.

[0053] The first and second screens are used to physically intercept larger suspended solids. The aerated grit chamber removes denser inorganic particles to prevent them from causing wear, blockage, and siltation to subsequent water pumps, pipes, and biological treatment tanks. By blowing air into the tank, the water flow is made to swirl. Utilizing the density difference between sand and organic matter, the sand settles to the bottom of the tank, while the organic matter is carried away by the water flow, thus achieving more effective separation.

[0054] Furthermore, the first screen is installed between the inlet pumping station and the sewage culvert, and a first valve is installed between the sewage culvert and the first screen. The inlet pumping station is connected to the aerated grit chamber. The second screen is installed between the inlet pumping station and the aerated grit chamber, and a second valve is installed between the second screen and the inlet pumping station. The aerated grit chamber is connected to the first biological reactor, and a third valve is installed between the aerated grit chamber and the first biological reactor.

[0055] The first stage of the bioreactor is equipped with an anaerobic tank, an anoxic tank, and an aerobic tank. The second and third stages of the bioreactor are both equipped with an anoxic tank and an aerobic tank.

[0056] When equipment such as the first screen, inlet pump room, or aerated grit chamber needs to be shut down for maintenance, the first, second, and third valves can be manually or automatically closed to isolate the corresponding pipe sections and ensure operational safety.

[0057] Furthermore, the control system is communicatively connected to the delivery pump, the electric diversion valve, the first valve, the second valve, the third valve, and the valves on the delivery pipeline.

[0058] A smart, regulated system for the coordinated treatment of domestic sewage and initial rainwater includes a data acquisition module, a judgment module, a control signal generation module, an equipment control module, and a protection module.

[0059] The data acquisition module acquires the detection signals of key water quality parameters from the monitoring device in real time.

[0060] The judgment module determines whether the process conditions for introducing initial rainwater are met based on the data collected by the data acquisition module.

[0061] The control signal generation module calculates the water pump and valve adjustment control commands when the judgment module determines that the introduction of initial rainwater is permissible.

[0062] The equipment control module receives adjustment and control commands generated by the control signal generation module and directly drives field equipment, including water pumps and valves, to perform actions.

[0063] The protection module monitors the safety status and enforces shutdown protection in abnormal situations.

[0064] Specifically, the data acquisition module is responsible for communicating with the field monitoring instruments to achieve continuous signal acquisition and standardization. It periodically reads the original analog current signals or digital bus signals from the online nitrate and dissolved oxygen monitors, converts the received analog signals into engineering unit values ​​through internal algorithms, and performs validity checks and filtering on the converted data. For example, it uses a moving average algorithm to remove instantaneous spike interference to ensure that the data uploaded to the judgment module is stable and reliable. The processed effective water quality parameters, such as nitrate concentration and dissolved oxygen concentration, are transmitted to the judgment module in real time.

[0065] The judgment module generates "allow introduction" or "prohibit introduction" instructions based on preset process conditions, comparing the real-time nitrate concentration sent by the data acquisition module with the set value; simultaneously, it compares the real-time dissolved oxygen concentration with the set value, performing an "AND" logical operation. Only when both conditions are met simultaneously—"nitrate concentration > set value" and "dissolved oxygen concentration ≥ set value"—is the introduction condition deemed met, and an "allow introduction" signal is output. Once the "allow introduction" signal is output, the downstream control signal generation module is immediately activated. If either condition is not met, the "prohibit introduction" state is maintained or output.

[0066] The control signal generation module converts the allowed instructions into precise equipment control quantities, calculates the deviation between the measured value and the target setpoint of nitrate concentration in real time, and dynamically calculates an optimal control output based on the magnitude and trend of the deviation using a built-in fuzzy PID control program. This output determines the amount of carbon source required and is ultimately converted into two specific, coordinated control signals:

[0067] Pump frequency setpoint: A command used to adjust the pump speed to control the flow rate;

[0068] Valve opening setting: A command used to adjust the valve position, which, in conjunction with the pump frequency, enables precise flow regulation;

[0069] Output limiting: Limits the amplitude of all generated command signals to ensure that the device operates within a safe range.

[0070] The equipment control module sends the frequency and opening setpoints from the control signal generation module to the pump's frequency converter and the valve's electric actuator via the analog output module or network communication. The frequency converter adjusts the pump motor speed according to the received frequency command; the electric actuator drives the valve core to the designated position according to the opening command, executing a safe start-stop sequence. For example, when starting, the valve is opened to a certain opening degree before starting the pump, and when stopping, the pump is stopped before closing the valve to prevent water hammer damage. The module reads the feedback signals from the frequency converter and actuator in real time, such as the actual frequency, actual opening degree, and operating / fault status, and uploads them to the human-machine interface for monitoring.

[0071] The protection module continuously monitors the dissolved oxygen concentration and nitrate concentration signals from the data acquisition module, and independently and quickly compares them with the preset safety interlock thresholds. Once any monitored parameter exceeds the safe range, this module will immediately act, bypass the normal logic of the judgment module and the control signal generation module, and directly send the "emergency shutdown" instruction with the highest priority to the equipment control module. The "emergency shutdown" instruction will force the pump frequency to be set to 0 and the valve opening to be set to 0%, unconditionally aborting the introduction of the initial rainwater, thus ensuring the core safety of the biochemical treatment system.

[0072] Exemplarily, taking the nitrate concentration in the anoxic tank as the main control parameter, its control threshold is set to 2.0 mg / L;

[0073] Condition for allowing introduction: Only when the dissolved oxygen concentration at the end of the aerobic tank is not less than 1.5 mg / L, the system allows the introduction of the initial rainwater to ensure sufficient nitrification ability in the aerobic tank and prevent inhibition due to additional load;

[0074] Cooperative judgment: When it is simultaneously detected that [nitrate concentration in the anoxic tank > 2.0 mg / L] and [dissolved oxygen concentration in the aerobic tank ≥ 1.5 mg / L], it is determined that the best working condition for introducing the initial rainwater is met, and the transfer pump is automatically started and enters the flow regulation mode;

[0075] Flow regulation parameters and process:

[0076] Reference flow: The system sets an initial safe introduction reference flow, which is 30% of the rated flow of a single pump (for example, 2500 m³ / h);

[0077] Proportional regulation: Based on the above reference flow, dynamic proportional regulation is carried out according to the deviation (e) between the measured value and the target value (2.0 mg / L) of the nitrate concentration in the anoxic tank;

[0078] When e > 1.0 mg / L (i.e., nitrate concentration > 3.0 mg / L), an output signal is sent to increase the pump frequency, increasing the introduced flow to 150% of the reference flow (i.e., 3750 m³ / h), and at the same time adjusting the opening of the electric control valve on the pipeline to 80% to achieve large-flow carbon source supplementation;

[0079] When 0.5 < e ≤ 1.0 mg / L, the introduced flow is maintained at 100% of the reference flow (i.e., 2500 m³ / h), and the valve opening is adjusted to 60%;

[0080] When e ≤ 0.5 mg / L (i.e., nitrate concentration is close to or lower than 2.5 mg / L), the output is reduced, reducing the introduced flow to 50% of the reference flow (i.e., 1250 m³ / h), and the valve opening is adjusted to 40% to avoid excessive carbon source;

[0081] Safety Interlock: If the dissolved oxygen concentration in the aerobic tank drops below 1.0 mg / L, or the nitrate concentration in the anoxic tank drops below 0.5 mg / L, the interlock protection will be immediately activated regardless of other conditions, stopping the transfer pump, closing the regulating valve, and halting the initial rainwater introduction to ensure the stable operation of the biological system.

[0082] Furthermore, the initial rainwater introduced into the anoxic tank is mixed with the domestic sewage that has undergone normal front-end treatment. In the alternating anoxic-aerobic environment, a full biochemical reaction takes place. The treated mixture enters the secondary sedimentation tank to achieve sludge-water separation. Part of the settled activated sludge is returned to the front end, and part is discharged as excess sludge. The supernatant then enters the subsequent advanced treatment facilities to ultimately achieve compliant discharge or resource reuse. The advanced treatment facilities may include magnetic coagulation high-efficiency sedimentation tanks, precision filtration devices, and ultraviolet disinfection devices.

[0083] The specific embodiments of the invention have been described in detail above, but these are merely examples. The invention is not limited to the specific embodiments described above. Those skilled in the art should understand that the embodiments and descriptions in the specification are only illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for the intelligent regulation and synergistic treatment of domestic sewage and initial rainwater, characterized in that, Includes the following steps: S1. Separate heavily polluted initial rainwater from clean mid-to-late rainwater, and divert the initial rainwater to a storage tank. S2. Store the heavily polluted initial rainwater in the regulating tank to equalize the water quantity and quality; S3. The homogenized initial rainwater is directly introduced into the end of the sewage treatment system, namely the biological treatment unit. S4. The initial rainwater introduced is fully mixed with domestic sewage from the front end of the sewage treatment system in the biological treatment unit. After undergoing nitrification, denitrification and organic matter degradation processes, it enters the subsequent secondary sedimentation tank for sludge-water separation. The supernatant obtained from the sedimentation is disinfected and discharged or reused after meeting the standards. The biochemical treatment unit includes a first bioreactor, a second bioreactor, and a third bioreactor. The first, second, and third bioreactors each include an anoxic tank and an aerobic tank. The biochemical treatment unit in step S3 is introduced into the anoxic tank of the third bioreactor. The third bioreactor is equipped with a monitoring device that adjusts the start / stop and flow rate of the delivery pump in real time according to the nitrate concentration in the anoxic tank or the dissolved oxygen concentration at the end of the aerobic tank connected to the anoxic tank. The monitoring device includes an online nitrate monitor installed in the anoxic tank and an online dissolved oxygen monitor installed in the aerobic tank. Both the online nitrate monitor and the online dissolved oxygen monitor are communicatively connected to the control system. The control system is communicatively connected to the delivery pump, the electric diversion valve, the first valve, the second valve, the third valve, and the valves on the delivery pipeline.

2. The intelligent regulation method for the coordinated treatment of domestic sewage and initial rainwater according to claim 1, characterized in that, In step S1, the heavily polluted initial rainwater and the clean mid-to-late stage rainwater are separated by a diversion device to separate the heavily polluted initial rainwater from the clean mid-to-late stage rainwater.

3. The intelligent regulation method for the coordinated treatment of domestic sewage and initial rainwater according to claim 1, characterized in that, In step S3, the initial rainwater, after homogenization, is transported by a pump and a pipeline, bypassing the pretreatment unit and primary sedimentation tank of the sewage treatment system, and enters the biochemical treatment unit.

4. The intelligent regulation method for the coordinated treatment of domestic sewage and initial rainwater according to claim 2, characterized in that, The diversion device includes an electric diversion valve, the inlet of which is connected to a rainwater culvert and the outlet of which is connected to a storage tank. A horizontal grid for intercepting large floating objects is installed near the inlet of the storage tank. A water pump is installed at the end of the storage tank, and the outlet of the water pump is connected to a delivery pipeline to deliver the rainwater in the storage tank to the biochemical treatment unit of the sewage treatment system.

5. A smart controlled system for the coordinated treatment of domestic sewage and initial rainwater, used to implement the smart controlled system for the coordinated treatment of domestic sewage and initial rainwater as described in claim 4, characterized in that, It includes a data acquisition module, a judgment module, a control signal generation module, an equipment control module, and a protection module; The data acquisition module acquires the detection signals of key water quality parameters from the monitoring device in real time. The judgment module determines whether the process conditions for introducing initial rainwater are met based on the data collected by the data acquisition module. The control signal generation module calculates the water pump and valve adjustment control commands when the judgment module determines that the introduction of initial rainwater is permissible. The equipment control module receives adjustment and control commands generated by the control signal generation module and directly drives field equipment, including water pumps and valves, to perform actions. The protection module monitors the safety status and enforces shutdown protection in abnormal situations.

Images