Glass fiber reinforced plastic integrated sewage treatment control method, storage medium and system

Abstract

This application discloses a control method, storage medium, and system for integrated fiberglass reinforced plastic (FRP) wastewater treatment. The control method includes: real-time acquisition of operating parameters within the integrated FRP wastewater treatment system; dynamic adjustment of the influent pump's operating frequency based on influent water quality parameters and a set baseline hydraulic retention time; adjustment of the aeration blower frequency using a PID algorithm based on dissolved oxygen parameters and a preset dissolved oxygen threshold range; acquisition of equipment body temperature parameters, combined with a preset model of the thermal conductivity of FRP material, to control the heating power of the temperature control equipment; and control of the start / stop of fluid transport equipment and sludge return pumps between treatment units based on the liquid level parameters of each treatment unit. Through these methods, the integrated FRP wastewater treatment control method provided in this application improves temperature control accuracy and energy efficiency, enhances the system's resistance to shock loads, effectively improves the system's operational stability, and significantly reduces operating energy consumption.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment and automatic control technology, and in particular to a fiberglass integrated wastewater treatment control method, storage medium and system. Background Technology

[0002] With increasingly stringent environmental protection requirements, integrated wastewater treatment equipment has been widely used in decentralized wastewater treatment due to its advantages such as small footprint, convenient installation, and short construction period. Among these, fiberglass reinforced plastic (FRP) material has gradually become the mainstream shell material for integrated wastewater treatment equipment due to its excellent corrosion resistance, lightweight yet high strength, and thermal insulation properties.

[0003] However, existing integrated FRP (fiberglass reinforced plastic) wastewater treatment equipment still has many shortcomings in operation and control. Current control methods largely copy the control strategies of traditional reinforced concrete structures, failing to integrate the physical properties of FRP with its integrated, compact structure for coordinated control. Specifically: First, the control logic is disconnected from the material properties. Fiberglass has an extremely low thermal conductivity, and its insulation performance is far superior to steel. However, traditional control methods do not take this characteristic into account, and heating control in winter still relies on empirical values, leading to distorted heat loss calculations and blind temperature control. This not only results in high heating energy consumption but also makes it prone to thermal stress due to localized overheating. At the same time, the resin matrix of fiberglass has a limited heat deformation temperature. Traditional temperature control lacks an interlocking protection mechanism based on the material's safe temperature, posing a risk of equipment overheating, deformation, or even structural failure.

[0004] Secondly, the integrated equipment has weak resistance to shock loads and lacks coordinated control. The hydraulic retention time of the integrated equipment is relatively short. When the influent water quality fluctuates, traditional constant flow or simple liquid level control cannot be dynamically adjusted according to the influent water quality, which can easily cause shock to the biological system and lead to excessive effluent. Moreover, the aeration control and sludge discharge control are mostly independent loops, which fail to establish effective dynamic coordination with the influent water quality and the liquid level of each unit, resulting in poor system operation stability and energy waste.

[0005] Therefore, there is an urgent need for a wastewater treatment control method that can achieve precise temperature control by matching the thermal conductivity of fiberglass material and can dynamically adjust according to water quality and quantity, and is shock-resistant and low-energy. Summary of the Invention

[0006] This application mainly provides a fiberglass integrated wastewater treatment control method, storage medium and system to solve the problems of temperature control distortion and high energy consumption caused by the failure of existing control methods to consider the thermal conductivity of fiberglass material, as well as the lack of dynamic collaborative control based on water quality and quantity, resulting in weak resistance to shock loads and poor operational stability.

[0007] To address the aforementioned technical problems, this application provides a technical solution: a control method for integrated fiberglass wastewater treatment. The integrated fiberglass wastewater treatment control method includes: real-time acquisition of operating parameters within the integrated fiberglass wastewater treatment system, including at least influent water quality parameters, liquid level parameters of each treatment unit, dissolved oxygen parameters, and equipment body temperature parameters; dynamically adjusting the operating frequency of the influent pump based on the influent water quality parameters and a set reference hydraulic retention time to control the influent flow rate; adjusting the frequency of the aeration blower using a PID algorithm based on the dissolved oxygen parameters and a preset dissolved oxygen threshold range to control the aeration volume; when the internal wastewater temperature is lower than a set lower limit for biological treatment temperature, acquiring the equipment body temperature parameters, calculating the heat loss under the current environment using a preset model of the thermal conductivity of the fiberglass material, and controlling the heating power of the temperature control equipment based on the heat loss; and controlling the start and stop of the fluid transport equipment and sludge return pump between each treatment unit based on the liquid level parameters of each treatment unit to achieve water balance and sludge discharge control between each treatment unit.

[0008] In some embodiments, dynamically adjusting the operating frequency of the influent pump based on the influent water quality parameters and a set reference hydraulic retention time includes: calculating the ratio K of the current influent pollutant equivalent to the standard pollutant equivalent; when the ratio K is greater than 1, according to the formula... Calculate the target frequency f of the inlet pump; where, The rated reference frequency of the inlet pump. The preset flow rate adjustment coefficient, and When the ratio K is less than or equal to 1, the inlet pump is controlled to operate at the rated reference frequency. Operation; when the calculated target frequency f is lower than the set minimum operating frequency, control the water inlet pump to operate at the minimum operating frequency and issue a high concentration water inlet alarm.

[0009] In some embodiments, adjusting the frequency of the aeration blower using a PID algorithm based on the dissolved oxygen parameter and a preset dissolved oxygen threshold range includes: introducing a feedforward compensation amount when adjusting the frequency of the aeration blower using the PID algorithm; the feedforward compensation amount is calculated based on the change rate of ammonia nitrogen concentration in the influent water quality parameters; when the change rate of ammonia nitrogen concentration exceeds a set threshold, the feedforward compensation amount is superimposed on the output of the PID algorithm to increase the frequency of the aeration blower in advance.

[0010] In some embodiments, calculating the heat loss under the current environment using a preset model of the thermal conductivity of fiberglass material, and controlling the heating power of the temperature control device based on the heat loss, includes: obtaining the temperature difference between the external ambient temperature and the internal sewage temperature. According to the fiberglass wall thickness and thermal conductivity Calculate the thermal conductivity. Where A is the effective heat dissipation area of ​​the equipment; if the internal sewage temperature is lower than the set lower limit of the biological treatment temperature, and the heat conduction rate Q is greater than the heat generation rate of the biochemical reaction, then the temperature control equipment is started to heat, and the heating power of the temperature control equipment is adjusted based on the value of the heat conduction rate Q.

[0011] In some embodiments, controlling the start and stop of the fluid transport equipment and sludge return pump between the processing units based on the liquid level parameters of each processing unit includes: real-time monitoring of the sludge-water interface liquid level of the sedimentation unit; when the sludge-water interface liquid level reaches a set first liquid level threshold, starting the sludge return pump to return the sludge to the anaerobic unit; when the sludge-water interface liquid level reaches a set second liquid level threshold and the running time of the sludge return pump reaches a preset limit, starting the sludge discharge valve to discharge the remaining sludge; wherein the flow rate of the sludge return pump is adjusted in a closed loop according to the deviation between the measured sludge concentration value of the anaerobic unit and the target concentration value.

[0012] In some embodiments, the method further includes: controlling the start and stop of a pulse agitator installed at the bottom of the tank at a set cycle in the aerobic unit and / or anoxic unit of the integrated fiberglass wastewater treatment system; the start duration of the pulse agitator is positively correlated with the stop duration of the influent pump, and is used to prevent sludge from settling and caking at the bottom of the fiberglass tank when the influent flow rate is zero.

[0013] In some embodiments, the method further includes: calculating the cumulative running time of the aeration blower; when the cumulative running time reaches a preset cleaning cycle, during a low-load period of the system, controlling the aeration blower to run at the highest rated frequency for a set duration, using high-intensity airflow to flush the microporous aeration disc located at the bottom of the aerobic unit to prevent microporous blockage.

[0014] In some embodiments, the operating parameters further include effluent water quality parameters; the method further includes: calculating the deviation between the effluent water quality parameters and the discharge standard limit; if the deviation exceeds the allowable error range, correcting the reference hydraulic retention time and / or the dissolved oxygen threshold range so that the system operating parameters in the next control cycle are adjusted in the direction of eliminating the deviation.

[0015] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a storage medium. The storage medium stores program data, characterized in that, when the program data is executed by a processor, it implements the steps of the aforementioned integrated fiberglass wastewater treatment control method.

[0016] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide an integrated fiberglass wastewater treatment system. The integrated fiberglass wastewater treatment system includes a processor and a memory interconnected thereto. The memory stores a computer program, and when the processor executes the computer program, it implements the steps of the aforementioned integrated fiberglass wastewater treatment control method.

[0017] The beneficial effects of this application are as follows: Unlike existing technologies, this application discloses an integrated fiberglass wastewater treatment control method, storage medium, and system. The embodiments of this application accurately calculate heat loss by combining a preset model of the thermal conductivity of fiberglass material, and control the heating power as needed when the temperature is below the lower limit of the biological treatment temperature. This achieves a deep integration of insulation characteristics and temperature control logic, avoiding energy waste and temperature control distortion caused by traditional blind heating, and improving temperature control accuracy and energy efficiency. Simultaneously, based on the ratio of the influent pollutant equivalent to the standard equivalent, the system reduces the frequency and extends the hydraulic retention time when the influent concentration is high, while maintaining baseline operation when the concentration is low, significantly enhancing the system's resistance to shock loads. Furthermore, based on the coordinated adjustment of liquid level and dissolved oxygen parameters, aeration, sludge discharge, and fluid transport are constructed, creating a dynamic and coordinated closed loop of water quality, water quantity, dissolved oxygen, and sludge level, effectively improving the system's operational stability and significantly reducing operating energy consumption. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic flowchart of an embodiment of the fiberglass integrated wastewater treatment control method provided in this application; Figure 2 This is a schematic diagram of the structure of an embodiment of the storage medium provided in this application; Figure 3 This is a structural schematic diagram of an embodiment of the fiberglass integrated sewage treatment system provided in this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] To address the problems of disconnect between control logic and material properties, lack of structural safety protection, and poor adaptability in existing integrated FRP (fiberglass reinforced plastic) wastewater treatment equipment, this application provides a collaborative control scheme based on material properties and structural safety. This control scheme, while constructing a basic closed loop for water quality and quantity, incorporates the thermodynamic and mechanical parameters of FRP into the control logic and decouples interference from the integrated structure. It requires only conventional sensors and PLC control hardware to achieve highly reliable control, significantly reducing equipment operation risks and maintenance costs.

[0023] Specifically, this application provides a fiberglass integrated wastewater treatment control method, see reference. Figure 1 , Figure 1 This is a schematic flow diagram of an embodiment of the integrated fiberglass wastewater treatment control method provided in this application. The control method includes: Step S1: Real-time acquisition of operating parameters within the integrated FRP wastewater treatment system. These operating parameters include at least the influent water quality parameters, the liquid level parameters of each treatment unit, the dissolved oxygen parameters, and the equipment body temperature parameters.

[0024] The system utilizes various sensors deployed within its perimeter to collect data in real time. An online COD / ammonia nitrogen analyzer on the inlet pipeline collects inlet water quality parameters; level gauges in each treatment unit collect level parameters; a DO meter in the aerobic tank collects dissolved oxygen parameters; and temperature sensors attached to the outer wall and interior of the tank collect equipment temperature parameters. Furthermore, for subsequent structural safety control, stress monitoring parameters of the fiberglass tank and effluent water quality parameters are also collected. To reduce interference from aeration pressure on the level gauges, level parameters can be pre-processed using a pressure compensation algorithm.

[0025] Step S2: Based on the influent water quality parameters and the set reference hydraulic residence time, dynamically adjust the operating frequency of the influent pump to control the influent flow rate.

[0026] Specifically, calculate the ratio K of the current influent pollutant equivalent to the standard pollutant equivalent; when the ratio K is greater than 1, according to the formula... Calculate the target frequency f of the inlet pump; where, The rated reference frequency of the inlet pump. The preset flow rate adjustment coefficient, and When the ratio K is less than or equal to 1, control the inlet pump to operate at the rated reference frequency. Operation; when the calculated target frequency f is lower than the set minimum operating frequency, control the water inlet pump to operate at the minimum operating frequency and issue a high concentration water inlet alarm.

[0027] Extensive experimental verification has shown that when the influent concentration is below or equal to the design standard (K≤1), the biochemical reaction time is sufficient, and maintaining the system at the baseline flow rate is enough to ensure treatment effectiveness while avoiding frequent adjustments that could cause flow fluctuations. However, when the influent concentration increases (K>1), if the flow rate is not reduced to extend the hydraulic retention time, the high concentration load will directly impact the biochemical system, leading to effluent exceeding standards. This formula, which adjusts the frequency only for high-concentration conditions, effectively resists high-concentration impacts while ensuring operational stability under low-load conditions. Simultaneously, a minimum frequency limit is set to ensure hydraulic safety and prevent sedimentation in the pipeline.

[0028] Step S3: Based on dissolved oxygen parameters and a preset dissolved oxygen threshold range, the frequency of the aeration blower is adjusted using a PID algorithm to control the aeration volume.

[0029] When using the PID algorithm to adjust the frequency of the aeration blower, a feedforward compensation is introduced. The feedforward compensation is calculated based on the rate of change of ammonia nitrogen concentration in the influent water quality parameters. When the rate of change of ammonia nitrogen concentration exceeds the set threshold, the feedforward compensation is added to the output of the PID algorithm to increase the frequency of the aeration blower in advance.

[0030] Because aeration and oxygenation have a significant transmission lag, relying solely on PID feedback regulation often results in nitrification being inhibited when the dissolved oxygen (DO) level drops and the airflow is increased. This embodiment overcomes this lag by extracting the ammonia nitrogen concentration change rate as a feedforward signal and immediately adding compensating airflow when a high nitrogen load is about to enter the aerobic tank, ensuring that nitrifying bacteria receive sufficient oxygen at the moment of impact.

[0031] Furthermore, when adjusting the frequency of the aeration blower, defoaming control logic is also incorporated: when the rate of increase in the liquid level of the aerobic unit is detected to be greater than the theoretical rate of increase caused by the influent flow rate, and the dissolved oxygen parameter shows abnormal fluctuations and decreases, it is determined that there is a risk of foam overflow; at this time, the reduction of the aeration blower frequency is temporarily suspended, and the defoaming spray device is started at the same time until the rate of increase in the liquid level returns to normal.

[0032] The integrated equipment has a closed and compact internal space, making it easy for foam to overflow into the sedimentation tank and cause sludge loss if it foams in the aerobic tank. If only a single liquid level signal is used for judgment, normal fluctuations in aeration pressure can easily cause false liquid level readings and lead to misjudgments. This embodiment uses dual signals of liquid level anomalies and DO fluctuations (foam covering the DO probe, causing an abnormal drop in readings) for cross-verification, accurately identifying foam risks, avoiding erroneous defoaming operations, and ensuring the stability of the biological system.

[0033] Step S4: When the internal sewage temperature is lower than the set lower limit of the biological treatment temperature, obtain the temperature parameters of the equipment body, combine the preset model of the thermal conductivity of the fiberglass material, calculate the heat loss under the current environment, and control the heating power of the temperature control equipment according to the heat loss.

[0034] Specifically, the temperature difference between the external ambient temperature and the internal sewage temperature is obtained. According to the fiberglass wall thickness and thermal conductivity Calculate the thermal conductivity. Where $A$ is the effective heat dissipation area of ​​the equipment; if the internal sewage temperature is lower than the set lower limit of the biological treatment temperature, and the heat conduction rate Q is greater than the heat generation rate of the biochemical reaction, the temperature control equipment will be activated to heat, and the heating power of the temperature control equipment will be adjusted based on the value of the heat conduction rate Q.

[0035] Fiberglass has extremely low thermal conductivity (approximately 1 / 100th that of steel), rendering traditional empirical formulas inapplicable. This embodiment quantitatively combines ambient temperature, internal water temperature, fiberglass wall thickness, and thermal conductivity to calculate heat loss tailored to the properties of fiberglass. Simultaneously, heating is only initiated when the water temperature is below the lower limit of biological treatment and heat loss exceeds biochemical heat generation, avoiding ineffective heating. Heating power is matched numerically based on the thermal conductivity rate Q, and the heater is controlled using a PWM duty cycle method, achieving precise calculation of thermal balance and on-demand heating, avoiding temperature overshoot and energy waste caused by the "one-size-fits-all" start / stop of traditional temperature control.

[0036] Furthermore, this method also includes interlocking protection control for abnormal operating conditions: when the temperature parameter of the equipment body exceeds the set structural safety temperature threshold, the power supply of the temperature control equipment is forcibly cut off and an overheating warning signal is sent. The structural safety temperature threshold is set according to the resin heat distortion temperature of the fiberglass material.

[0037] The resin matrix of fiberglass has a limited heat distortion temperature. If the temperature of the material exceeds this limit due to heat generation from aeration in summer or abnormal temperature control malfunction, the resin will soften and deform, and the structural strength will decrease sharply. This embodiment prevents catastrophic accidents caused by overheating and structural failure by setting a safe structural temperature threshold and forcibly cutting off the heat source.

[0038] Step S5: Based on the liquid level parameters of each treatment unit, control the start and stop of the fluid conveying equipment and sludge return pump between each treatment unit to achieve water balance and sludge discharge control between each treatment unit.

[0039] Since the internal compartments of the integrated equipment mostly rely on guide plates or air lift for water flow and rarely use electric water valves that are prone to jamming, this step regulates the water balance by controlling fluid conveying equipment such as air lift return devices and sludge return pumps.

[0040] Specifically, the sludge-water interface level of the sedimentation unit is monitored in real time; when the sludge-water interface level reaches the set first level threshold, the sludge return pump is started to return the sludge to the anaerobic unit; when the sludge-water interface level reaches the set second level threshold and the sludge return pump's running time reaches the preset limit, the sludge discharge valve is started to discharge the remaining sludge; wherein, the flow rate of the sludge return pump is adjusted in a closed loop according to the deviation between the measured sludge concentration value of the anaerobic unit and the target concentration value.

[0041] This embodiment achieves a dual closed loop of sludge concentration and sludge level, preventing anaerobic phosphorus release and sludge overturning caused by excessively high sludge levels in the sedimentation tank, and ensuring that the effluent SS meets the standards.

[0042] This embodiment constructs a five-element collaborative closed-loop control architecture based on "water quality-water quantity-dissolved oxygen-thermal balance-sludge level" through steps S1 to S5, filling the gap in existing control methods that lack specific thermodynamic calculations for fiberglass, and realizing a deep integration of thermal insulation characteristics and control logic.

[0043] Furthermore, since fiberglass tanks typically employ a flat-bottom design with a gentle slope and no sludge hopper, they are highly susceptible to sludge compaction during low-load or shutdown periods. Therefore, this method also includes anti-settling dead zone control: in the aerobic and / or anoxic units of the integrated equipment, the pulse agitator installed at the bottom of the tank is started and stopped at a set cycle; the operating duration of the pulse agitator is positively correlated with the shutdown duration of the influent pump, which is used to prevent sludge deposition and compaction at the bottom of the fiberglass tank when the influent flow rate is zero. This solves the stubborn problem of dead sludge in flat-bottomed tanks with extremely low energy consumption and restores sludge activity.

[0044] Furthermore, the operating parameters also include stress monitoring parameters for the FRP tank. When the stress value collected by the strain gauges arranged at key nodes of the tank (such as the junction of the end cap and the cylinder) exceeds the preset stress threshold, the operating frequency of the water inlet pump is reduced and the number of aeration blowers turned on is reduced to reduce the water pressure and air pressure load inside the tank.

[0045] Fiberglass is a brittle material with high tensile strength but weak impact resistance and deformation capacity. When the influent water level is too high or the aeration blower abnormally pressurizes, causing the internal pressure to exceed the limit, traditional control systems do not actively reduce the pressure, which can easily lead to bursting. This application creatively introduces the concept of civil engineering structural safety into electrical control. Through the logic of "sensing-pressure reduction-structure protection," it actively relieves pressure, greatly extending the service life of fiberglass equipment.

[0046] In addition, this method also includes self-cleaning control: the cumulative running time of the aeration blower is counted; when the cumulative running time reaches the preset cleaning cycle, during the low load period of the system, the aeration blower is controlled to run at the highest rated frequency for a set time, and the high-intensity airflow is used to flush the microporous aeration disc set at the bottom of the aerobic unit to prevent microporous blockage. The high-efficiency mass transfer of the aeration system can be maintained without manual tank cleaning.

[0047] Finally, to endow the system with long-term adaptive capability, the operating parameters also include effluent water quality parameters; the method also includes feedback compensation based on effluent water quality: calculating the deviation between the effluent water quality parameters and the discharge standard limits; if the deviation exceeds the allowable error range, then correcting the reference hydraulic residence time and / or dissolved oxygen threshold range so that the system operating parameters in the next control cycle are adjusted in the direction of eliminating the deviation.

[0048] A closed-loop feedback system for the entire process of "inlet-process-outlet" has been constructed, enabling the system to adapt and evolve in response to long-term factors such as seasonal changes and microbial aging, thus truly achieving intelligent operation without human intervention.

[0049] See Figure 2 , Figure 2 This is a schematic diagram of an embodiment of the storage medium provided in this application.

[0050] The storage medium 10 stores program data 11, which, when executed by the processor, implements, as follows: Figure 1 The steps of the described integrated fiberglass wastewater treatment control method.

[0051] The program data 41 is stored in a storage medium 40 and includes several instructions for causing a network device (which may be a router, personal computer, server, or other network device) or processor to execute all or part of the steps of the methods described in the various embodiments of this application.

[0052] Optionally, the storage medium 40 can be any medium capable of storing program data 41, such as a USB flash drive, portable hard drive, read-only memory (ROM), random access memory (RAM), disk, or optical disc.

[0053] See Figure 3 , Figure 3 This is a schematic diagram of an embodiment of the integrated fiberglass wastewater treatment system provided in this application. The integrated fiberglass wastewater treatment system 50 includes a processor 52 and a memory 51 connected to each other. The memory 51 stores a computer program. When the processor 52 executes the computer program, it implements the steps of the integrated fiberglass wastewater treatment control method described above.

[0054] Unlike existing technologies, this application discloses an integrated fiberglass wastewater treatment control method. The embodiments of this application accurately calculate heat loss by combining a preset model of the thermal conductivity of fiberglass material, and control the heating power as needed when the temperature is below the lower limit of the biological treatment temperature. This achieves a deep integration of insulation characteristics and temperature control logic, avoiding energy waste and temperature control distortion caused by traditional blind heating, and improving temperature control accuracy and energy efficiency. Simultaneously, based on the ratio of influent pollutant equivalent to standard equivalent, the system reduces the frequency and extends the hydraulic retention time when the influent concentration is high, while maintaining baseline operation when the concentration is low, significantly enhancing the system's resistance to shock loads. Furthermore, based on the coordinated adjustment of liquid level and dissolved oxygen parameters, aeration, sludge discharge, and fluid transport are constructed, creating a dynamic and coordinated closed loop of water quality, water quantity, dissolved oxygen, and sludge level, effectively improving the system's operational stability and significantly reducing operating energy consumption.

[0055] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A fiberglass integrated wastewater treatment control method, characterized in that, include: S1. Real-time acquisition of operating parameters within the integrated FRP wastewater treatment system, including at least influent water quality parameters, liquid level parameters of each treatment unit, dissolved oxygen parameters, and equipment body temperature parameters; S2. Based on the influent water quality parameters and the set reference hydraulic retention time, dynamically adjust the operating frequency of the influent pump to control the influent flow rate; S3. Based on the dissolved oxygen parameters and the preset dissolved oxygen threshold range, the frequency of the aeration blower is adjusted using a PID algorithm to control the aeration volume. S4. When the internal sewage temperature is lower than the set lower limit of the biological treatment temperature, the temperature parameters of the equipment body are obtained, and the heat loss under the current environment is calculated by combining the preset model of the thermal conductivity of the fiberglass material, and the heating power of the temperature control equipment is controlled according to the heat loss. S5. Based on the liquid level parameters of each treatment unit, control the start and stop of the fluid conveying equipment and sludge return pump between each treatment unit to achieve water balance and sludge discharge control between each treatment unit.

2. The integrated fiberglass wastewater treatment control method according to claim 1, characterized in that, In step S2, the dynamic adjustment of the operating frequency of the inlet pump includes: Calculate the ratio K of the current influent pollutant equivalent to the standard pollutant equivalent; When the ratio K is greater than 1, according to the formula Calculate the target frequency f of the inlet pump; where, The rated reference frequency of the inlet pump. The preset flow rate adjustment coefficient, and ; When the ratio K is less than or equal to 1, control the inlet pump to operate at the rated reference frequency. run; When the calculated target frequency f is lower than the set minimum operating frequency, the water inlet pump is controlled to operate at the minimum operating frequency and a high concentration water inlet alarm is issued.

3. The integrated fiberglass wastewater treatment control method according to claim 1, characterized in that, In step S3, when the frequency of the aeration blower is adjusted using the PID algorithm, a feedforward compensation amount is introduced. The feedforward compensation amount is calculated based on the change rate of ammonia nitrogen concentration in the influent water quality parameters. When the change rate of ammonia nitrogen concentration exceeds the set threshold, the feedforward compensation amount is superimposed on the output of the PID algorithm to increase the frequency of the aeration blower in advance.

4. The integrated fiberglass wastewater treatment control method according to claim 1, characterized in that, In step S4, calculating the heat loss under the current environment by combining the preset model of the thermal conductivity of fiberglass material includes: The temperature difference between the external ambient temperature and the internal sewage temperature is obtained. ; According to the fiberglass wall thickness and thermal conductivity Calculate the thermal conductivity. , where A is the effective heat dissipation area of ​​the equipment; If the internal sewage temperature is lower than the set lower limit of the biological treatment temperature, and the heat conduction rate Q is greater than the heat generation rate of the biochemical reaction, then the temperature control equipment will be activated to heat the sewage, and the heating power of the temperature control equipment will be adjusted based on the value of the heat conduction rate Q.

5. The integrated fiberglass wastewater treatment control method according to claim 1, characterized in that, In step S5, the specific steps for achieving water balance and sludge discharge control include: Real-time monitoring of the mud-water interface level in the sedimentation unit; When the sludge-water interface level reaches the set first level threshold, the sludge return pump is started to return the sludge to the anaerobic unit. When the mud-water interface level reaches the set second level threshold and the sludge return pump runs for the preset time limit, the sludge discharge valve is activated to discharge the remaining sludge. The flow rate of the sludge return pump is adjusted in a closed loop based on the deviation between the measured sludge concentration value of the anaerobic unit and the target concentration value.

6. The integrated fiberglass wastewater treatment control method according to claim 1, characterized in that, Also includes: In the aerobic and / or anoxic units of the integrated fiberglass wastewater treatment system, the pulse stirring device installed at the bottom of the tank is started and stopped according to a set cycle. The duration of the pulse agitation device is positively correlated with the duration of the inlet pump's shutdown, and is used to prevent sludge from settling and hardening at the bottom of the fiberglass tank when the inlet flow rate is zero.

7. The integrated fiberglass wastewater treatment control method according to claim 1, characterized in that, Also includes: Calculate the cumulative operating time of the aeration blower; When the cumulative running time reaches the preset cleaning cycle, during the low load period of the system, the aeration blower is controlled to run at the highest rated frequency for the set duration, using high-intensity airflow to flush the microporous aeration discs set at the bottom of the aerobic unit to prevent microporous blockage.

8. The integrated fiberglass wastewater treatment control method according to claim 1, characterized in that, The operating parameters also include effluent water quality parameters, and the integrated fiberglass wastewater treatment control method further includes: Calculate the deviation between the effluent water quality parameters and the discharge standard limits; If the deviation exceeds the allowable error range, the reference hydraulic residence time and / or the dissolved oxygen threshold range are corrected so that the system operating parameters in the next control cycle are adjusted in the direction of eliminating the deviation.

9. A storage medium storing program data thereon, characterized in that, When the program data is executed by the processor, it implements the steps of the fiberglass integrated wastewater treatment control method as described in any one of claims 1-8.

10. A fiberglass integrated sewage treatment system, characterized in that, It includes an interconnected processor and a memory, the memory storing a computer program, and when the processor executes the computer program, it implements the steps of the fiberglass integrated wastewater treatment control method as described in any one of claims 1-8.

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