A dissolved oxygen concentration control method applied to an aeration oxygenation system

Abstract

The present application relates to sewage treatment and aquaculture technical field, more particularly to a kind of dissolved oxygen concentration control method applied to aeration oxygenation system, method includes: periodically obtaining the dissolved oxygen data of target area, and calculating first dissolved oxygen concentration difference, when first dissolved oxygen concentration difference is greater than or equal to preset dissolved oxygen concentration difference threshold, start aeration control system, increase aeration quantity to target area, and after preset time, set dissolved oxygen concentration standard value and second dissolved oxygen concentration difference, obtain aeration standard amount;Aeration control system controls aeration equipment output, and every interval preset second time interval does once aeration system detection, judges whether aeration is effective;When third dissolved oxygen concentration difference is less than preset dissolved oxygen concentration difference threshold, execute water temperature regulation, and the water temperature of target area is regulated to target temperature.The present application can ensure that the dissolved oxygen concentration in water is maintained in the set optimum range.

Description

Technical Field

[0001] This invention relates to the fields of wastewater treatment and aquaculture technology, and more specifically to a method for controlling dissolved oxygen concentration in an aeration system. Background Technology

[0002] Dissolved oxygen (DO) is a crucial factor in maintaining biological activity, promoting pollutant degradation, and supporting the growth of aquatic organisms during wastewater treatment and aquaculture, significantly impacting the ecological environment and human health. Dissolved oxygen refers to the concentration of oxygen dissolved in water, usually expressed in milligrams per liter (mg / L). When the dissolved oxygen concentration in water decreases, fish may experience stress and hypoxia, exhibiting restlessness, agitation, and abnormal swimming behavior. Severe hypoxia can even lead to fish mortality, negatively impacting water quality, ecological balance, and human life. Therefore, controlling dissolved oxygen is an urgent problem to be solved.

[0003] In existing technologies, aeration and oxygenation often rely on manual experience to adjust the aeration rate, making it difficult to achieve precise control of dissolved oxygen concentration. Moreover, the specific requirements for dissolved oxygen concentration are not fully considered, which may lead to over- or under-aeration, resulting in energy waste and failure to achieve the expected dissolved oxygen control effect. Summary of the Invention

[0004] This invention provides a method for controlling dissolved oxygen concentration in an aeration system, which aims to ensure that the dissolved oxygen concentration in the water is maintained within the set optimal range through real-time monitoring and intelligent regulation, thereby reducing energy consumption and operating costs.

[0005] To achieve the above-mentioned objectives, this invention provides a method for controlling dissolved oxygen concentration in an aeration system. This method involves setting a target area in the water body, installing dissolved oxygen monitoring equipment in the target area, and implementing the method by performing the following steps:

[0006] Step S1: The control unit periodically acquires dissolved oxygen data of the target area from the dissolved oxygen monitoring device based on a preset first time interval as first dissolved oxygen data. The first dissolved oxygen data includes dissolved oxygen concentration and water temperature. The first dissolved oxygen concentration difference is calculated based on the first dissolved oxygen data. When the first dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold, step S2 is executed to start the aeration control system.

[0007] Step S2: The aeration control system issues an aeration volume adjustment command to increase the aeration volume to the target area. After a preset time, based on the preset first time interval, it periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device as the second dissolved oxygen data. Based on the second dissolved oxygen data, it sets a standard value for dissolved oxygen concentration and calculates a second dissolved oxygen concentration difference based on the standard value. It also obtains the standard aeration volume. The aeration control system controls the aeration device to output aeration equal to the standard aeration volume and performs an aeration system test every preset second time interval to check whether the aeration is effective.

[0008] Step S3: When performing aeration system testing, a test is performed every preset second time interval. During the test, dissolved oxygen data of the target area is periodically acquired from the dissolved oxygen monitoring device at the preset first time interval as third dissolved oxygen data. A third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. When the third dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, the aeration is determined to be invalid, and step S2 is executed. When the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the aeration is determined to be valid, and step S4 is executed, wherein the preset second time interval is greater than the preset first time interval.

[0009] Step S4: The control unit controls the water temperature to enter a self-regulation process, obtains the water temperature from the third dissolved oxygen data, and initiates temperature adjustment measures. When aeration is effective and the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the water temperature of the target area is adjusted to the target temperature.

[0010] As a preferred embodiment of the present invention, the method further includes the following step after step S4:

[0011] Step S5: During the water temperature self-regulation process, if the water temperature in the target area is greater than or equal to the first temperature or less than the second temperature, and the dissolved oxygen concentration in the third dissolved oxygen data is decreasing, an early warning is issued. If the water temperature self-regulation is not performed or is ineffective, the aeration rate of the aeration equipment is reduced to half of the most recent aeration rate. If the aeration rate has been adjusted to the minimum value of the aeration equipment, an emergency command is issued, and a water exchange operation is performed in the target area. During the water exchange operation, the water exchange volume is less than or equal to N percent of the total water volume in the target area. After the water exchange operation, the dissolved oxygen concentration is detected again. If the re-detected dissolved oxygen concentration still does not increase, an abnormal alarm is issued, and further detection is performed. N represents a positive integer greater than or equal to 50 and less than 100.

[0012] As a preferred embodiment of the present invention, step S1, calculating the first dissolved oxygen concentration difference, includes:

[0013] The maximum value and the minimum value of dissolved oxygen concentration are obtained from the first dissolved oxygen data. The difference between the maximum value and the minimum value of dissolved oxygen concentration is calculated and used as the first dissolved oxygen concentration difference.

[0014] As a preferred embodiment of the present invention, step S2, setting the dissolved oxygen concentration standard value includes:

[0015] Calculate the average value of all dissolved oxygen concentrations in the second dissolved oxygen data, and also calculate the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the average value, and take the dissolved oxygen concentration with the smallest difference from the average value as the standard value of dissolved oxygen concentration.

[0016] As a preferred embodiment of the present invention, step S2, obtaining the aeration standard quantity includes:

[0017] Calculate the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the standard value of dissolved oxygen concentration to obtain multiple second dissolved oxygen concentration differences. When any one of the multiple second dissolved oxygen concentration differences is less than the preset dissolved oxygen concentration difference threshold, the aeration rate when the second dissolved oxygen data of the target area is obtained is taken as the aeration standard rate.

[0018] As a preferred embodiment of the present invention, step S4, initiating temperature adjustment measures includes:

[0019] When the water temperature is greater than or equal to the first temperature, cooling measures are initiated to adjust the water temperature in the target area to be lower than the first temperature. When the water temperature is lower than the second temperature, heat preservation measures are initiated to adjust the water temperature in the target area to be greater than or equal to the second temperature or to increase the aeration rate.

[0020] As a preferred embodiment of the present invention, the water change operation includes:

[0021] The temperature of the water to be entered into the target area is taken as the third temperature, and the temperature of the water in the target area is taken as the fourth temperature. The temperature difference between the third temperature and the fourth temperature is calculated. When the temperature difference is greater than or equal to a preset temperature difference, a cooling agent is added to the water to be entered into the target area. When the temperature difference is less than the preset temperature difference, a heating agent is added to the water to be entered into the target area.

[0022] As a preferred embodiment of the present invention, the aeration system detection further includes:

[0023] During the preset second time interval, the dissolved oxygen data of the target area is obtained as the fourth dissolved oxygen data at the preset first time interval. The dissolved oxygen concentration is obtained from the fourth dissolved oxygen data. Based on the comparison result of the dissolved oxygen concentration and the standard value of dissolved oxygen concentration, the aeration rate of the aeration device is adjusted. After adjusting the aeration rate, the aeration system is started for detection once every preset first time interval.

[0024] As a preferred embodiment of the present invention, adjusting the aeration rate of the aeration device includes:

[0025] When the dissolved oxygen concentration is less than or equal to the standard value of dissolved oxygen concentration, the standard aeration amount is set to be equal to the current aeration amount of the aeration equipment.

[0026] As a preferred embodiment of the present invention, adjusting the aeration rate of the aeration device further includes:

[0027] When the dissolved oxygen concentration is greater than the standard value of dissolved oxygen concentration, the current aeration rate of the aeration equipment is set to be equal to the standard aeration rate.

[0028] Compared with the prior art, the beneficial effects of the present invention are at least as follows:

[0029] 1. The technical solution of this invention periodically acquires dissolved oxygen data of a target area from a dissolved oxygen monitoring device at a preset first time interval as first dissolved oxygen data. This first dissolved oxygen data includes dissolved oxygen concentration and water temperature. A first dissolved oxygen concentration difference is calculated based on this first dissolved oxygen data. When this first dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold, the aeration control system is activated, ensuring timely measures are taken when the dissolved oxygen concentration is insufficient. The aeration control system issues an aeration volume adjustment command to increase the aeration volume to the target area. After a preset time, it periodically acquires dissolved oxygen data of the target area from the dissolved oxygen monitoring device again at the preset first time interval as second dissolved oxygen data. A standard dissolved oxygen concentration value is set based on this second dissolved oxygen data. A second dissolved oxygen concentration difference is also calculated based on this standard value, and a standard aeration volume is obtained. The aeration control system controls the aeration equipment to output an aeration volume equal to the standard aeration volume. An aeration system test is performed every preset second time interval to check the effectiveness of aeration. By precisely adjusting the aeration volume, the dissolved oxygen concentration is ensured to reach the preset standard.

[0030] 2. An aeration test is performed at a preset second time interval. During the test, dissolved oxygen data of the target area is periodically obtained from the dissolved oxygen monitoring device at a preset first time interval as the third dissolved oxygen data. The third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. When the third dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, the aeration is determined to be ineffective, and the aeration rate is increased again. When the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the aeration is determined to be effective, and water temperature adjustment is performed. This allows for timely detection and resolution of ineffective aeration issues, avoiding energy waste and environmental pollution caused by ineffective aeration.

[0031] 3. Furthermore, by controlling the water temperature to enter a self-regulating process, the water temperature is obtained from the third dissolved oxygen data, and temperature adjustment measures are initiated. When aeration is effective and the third dissolved oxygen concentration difference is less than a preset dissolved oxygen concentration difference threshold, the water temperature in the target area is adjusted to the target temperature to further improve water quality and dissolved oxygen conditions, enhance the biological activity of the water body, and promote the healthy development of the ecosystem. Through the coordination of the above steps, this invention can ensure that the dissolved oxygen concentration in the water body is maintained within the set optimal range, thereby reducing energy consumption and operating costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 This is a flowchart illustrating the steps of a dissolved oxygen concentration control method applied to an aeration and oxygenation system according to the present invention.

[0034] Figure 2 This is a schematic diagram of the working state of a dissolved oxygen monitoring device applied in an aeration and oxygenation system according to the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but unless otherwise specified, these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first script may be referred to as a second script, and similarly, a second script may be referred to as a first script.

[0037] Aeration and oxygenation often rely on manual experience to adjust the aeration rate, making it difficult to achieve precise control of dissolved oxygen concentration. Moreover, it does not fully consider the specific needs for dissolved oxygen concentration, which may lead to over- or under-aeration, resulting in energy waste and failure to achieve the expected dissolved oxygen control effect.

[0038] To address the aforementioned technical problems, the present invention proposes the following... Figure 1 The method shown is for controlling dissolved oxygen concentration in an aeration and oxygenation system, such as... Figure 2 As shown, a target area is set up in the water body, and dissolved oxygen monitoring equipment is installed in the target area, which is achieved through the following steps:

[0039] Step S1: The control unit periodically acquires dissolved oxygen data of the target area from the dissolved oxygen monitoring device based on a preset first time interval as the first dissolved oxygen data. The first dissolved oxygen data includes dissolved oxygen concentration and water temperature. The first dissolved oxygen concentration difference is calculated based on the first dissolved oxygen data. When the first dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, step S2 is executed to start the aeration control system.

[0040] Specifically, a fixed time interval (e.g., every 2 minutes) is set, and dissolved oxygen concentration and water temperature data of the target area are automatically collected by the dissolved oxygen monitoring device. These data are recorded as the first dissolved oxygen data. Subsequently, the control unit calculates the difference between the maximum and minimum dissolved oxygen concentration values ​​collected in this instance, i.e., the first dissolved oxygen concentration difference. If this difference is greater than or equal to a preset dissolved oxygen concentration difference threshold (e.g., ±1 mg / L), it indicates a significant change in dissolved oxygen concentration, requiring the activation of the aeration control system. By monitoring changes in dissolved oxygen concentration in real time, timely measures can be taken when the dissolved oxygen concentration is insufficient. This collection refers to continuously acquiring data from the dissolved oxygen monitoring device at fixed time intervals, and this collection includes one or more collection cycles.

[0041] Step S2: The aeration control system issues an aeration volume adjustment command to increase the aeration volume to the target area. After a preset time, it periodically obtains dissolved oxygen data of the target area from the dissolved oxygen monitoring device again based on a preset first time interval as the second dissolved oxygen data. Based on the second dissolved oxygen data, it sets a standard value for dissolved oxygen concentration, calculates the second dissolved oxygen concentration difference based on the standard value, and obtains the standard aeration volume. The aeration control system controls the aeration equipment to output aeration equal to the standard aeration volume, and performs an aeration system test every preset second time interval to check whether the aeration is effective.

[0042] Specifically, when step S1 determines that the aeration control system needs to be activated, the system issues a command to increase the aeration rate in the target area. After a period of aeration, such as 20 minutes, dissolved oxygen data is collected again and recorded as the second dissolved oxygen data. Based on this data, the system sets a standard value for dissolved oxygen concentration and calculates the difference between the current dissolved oxygen concentration and the standard value, i.e., the second dissolved oxygen concentration difference. Simultaneously, the standard aeration rate is calculated according to a preset algorithm or empirical formula. Afterward, the aeration control system adjusts the output of the aeration equipment to equal the standard aeration rate and performs an aeration effect test every 10 minutes or so. By precisely adjusting the aeration rate, the dissolved oxygen concentration is ensured to reach the preset standard.

[0043] Step S3: When testing the aeration system, a test is performed every preset second time interval. During the test, dissolved oxygen data of the target area is periodically obtained from the dissolved oxygen monitoring device at a preset first time interval as the third dissolved oxygen data. The third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. When the third dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, the aeration is determined to be invalid, and step S2 is executed. When the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the aeration is determined to be valid, and step S4 is executed. The preset second time interval is greater than the preset first time interval.

[0044] Specifically, during the aeration system detection phase, the system measures dissolved oxygen every 10 minutes and collects dissolved oxygen data every 2 minutes, recording this as the third dissolved oxygen data. Based on these data, the third dissolved oxygen concentration difference is calculated and compared with a preset dissolved oxygen concentration difference threshold. If the difference is greater than or equal to the threshold, aeration is deemed ineffective, and step S2 above needs to be repeated. If the difference is less than the threshold, aeration is deemed effective, and the process proceeds to the next step: water temperature adjustment. Regular monitoring allows for timely detection and resolution of ineffective aeration issues, preventing energy waste and environmental pollution caused by ineffective aeration.

[0045] Step S4: The control unit controls the water temperature to enter the self-regulation process, obtains the water temperature from the third dissolved oxygen data, and starts temperature adjustment measures. When aeration is effective and the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the water temperature in the target area is adjusted to the target temperature.

[0046] Specifically, when aeration is effective and dissolved oxygen concentration is stable, the system enters a self-regulating water temperature process. It extracts water temperature information from the third dissolved oxygen data and initiates temperature adjustment measures (such as heating or cooling). The goal is to adjust the water temperature to a preset target temperature to further optimize dissolved oxygen concentration and water quality. By regulating water temperature, water quality and dissolved oxygen conditions are further improved, enhancing the biological activity of the water body and promoting the healthy development of the ecosystem.

[0047] The second, third, and first dissolved oxygen data contain the same data types, including dissolved oxygen concentration and water temperature.

[0048] Through the coordination of the above steps, the present invention can ensure that the dissolved oxygen concentration in the water is maintained within the set optimal range, thereby reducing energy consumption and operating costs.

[0049] Furthermore, the process following step S4 also includes:

[0050] Step S5: During the water temperature self-regulation process, if the water temperature in the target area is greater than or equal to the first temperature or less than the second temperature, and the dissolved oxygen concentration in the third dissolved oxygen data is decreasing, an early warning is issued. If water temperature self-regulation is not performed or is ineffective, the aeration rate of the aeration equipment is reduced to half of the most recent aeration rate. If the aeration rate has already been adjusted to the minimum value of the aeration equipment, an emergency command is issued, and a water exchange operation is performed in the target area. During the water exchange operation, the water exchange volume is less than or equal to N percent of the total water volume in the target area. After the water exchange operation, the dissolved oxygen concentration is monitored again. If the re-detected dissolved oxygen concentration still does not increase, an abnormal alarm is issued, and further testing is performed. N represents a positive integer greater than or equal to 50 and less than 100.

[0051] Specifically, when the system detects the above-mentioned abnormal situation, it first issues an early warning, notifying the operator to pay attention and prepare for emergency handling. If the water temperature self-regulation is not performed or is ineffective (i.e., the temperature is still outside the range and the dissolved oxygen concentration continues to decrease), the system will automatically adjust the aeration rate of the aeration equipment, reducing it to half of the aeration rate at the most recent adjustment. If the dissolved oxygen concentration still does not improve after adjusting the aeration rate, and the aeration rate has already been adjusted to the minimum value of the aeration equipment, the system will issue an emergency command, prompting the operator to perform a water change. During the water change operation, the amount of water changed each time should be controlled within 80% of the total water volume in the target area to avoid excessive impact on water quality during the water change process. After the water change operation is completed, the system will continue to monitor the dissolved oxygen concentration. If the re-detected dissolved oxygen concentration still does not increase, the system will issue an abnormal alarm and recommend that the operator conduct further testing and analysis to determine the root cause of the problem. By monitoring changes in water temperature and dissolved oxygen concentration in real time, abnormal situations can be detected and addressed promptly to prevent water quality deterioration. When temperature anomalies or dissolved oxygen concentrations drop, adjusting aeration rates and water exchange procedures effectively improves water quality. Reasonable adjustment ranges for water exchange and aeration rates are also established to ensure operational safety and effectiveness, avoiding unnecessary interference with water quality. These steps refine the entire dissolved oxygen concentration control method, enabling better response to various emergencies and ensuring stable and compliant water quality.

[0052] Further, in step S1 above, calculating the first dissolved oxygen concentration difference includes:

[0053] Obtain the maximum and minimum dissolved oxygen concentrations from the first dissolved oxygen data, calculate the difference between the maximum and minimum dissolved oxygen concentrations, and use it as the first dissolved oxygen concentration difference.

[0054] Specifically, each data collection session includes one or more collection cycles, obtaining all dissolved oxygen concentration values ​​within a given time period. The dissolved oxygen concentration may vary during this period. The maximum and minimum values ​​are identified among these different dissolved oxygen concentrations; these two values ​​represent the highest and lowest points of dissolved oxygen concentration within that time period, respectively. The difference between the maximum and minimum dissolved oxygen concentrations is calculated; this difference is the first dissolved oxygen concentration difference. By calculating the difference between the maximum and minimum dissolved oxygen concentrations, the fluctuation of dissolved oxygen concentration within a time period can be visually reflected. If the first dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold, it indicates that the dissolved oxygen concentration fluctuates significantly, requiring the activation of the aeration control system to adjust the dissolved oxygen concentration and ensure water quality stability.

[0055] Furthermore, in step S2 above, setting the standard value for dissolved oxygen concentration includes:

[0056] The average value of all dissolved oxygen concentrations in the second dissolved oxygen data is calculated. The difference between each dissolved oxygen concentration in the second dissolved oxygen data and the average value is also calculated. The dissolved oxygen concentration with the smallest difference from the average value is taken as the standard value of dissolved oxygen concentration.

[0057] Specifically, a standard value for dissolved oxygen concentration is set to facilitate subsequent calculations of dissolved oxygen concentration differences and further adjustments to the aeration rate. By calculating the average of all dissolved oxygen concentrations in the second dissolved oxygen data set and identifying the dissolved oxygen concentration with the smallest difference from the average as the standard value, the representativeness of the standard value is ensured, reflecting the overall dissolved oxygen concentration level after aeration adjustment. Using this standard value as a benchmark for subsequent calculations of dissolved oxygen concentration differences allows for a more accurate assessment of the aeration effect and provides a basis for further adjustments to the aeration rate, thus improving the accuracy and reliability of the entire control method.

[0058] Furthermore, in step S2 above, obtaining the aeration standard quantity includes:

[0059] Calculate the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the standard value of dissolved oxygen concentration, and obtain multiple second dissolved oxygen concentration differences. When any one of the multiple second dissolved oxygen concentration differences is less than the preset dissolved oxygen concentration difference threshold, the aeration rate when the second dissolved oxygen data of the target area is obtained is taken as the aeration standard rate.

[0060] Specifically, by calculating the difference between each dissolved oxygen concentration and the standard value, and checking whether these differences are less than a preset threshold, the effectiveness of the current aeration rate can be accurately assessed. If at least one difference is less than the threshold, the aeration rate at this point is used as the standard rate, ensuring that the aeration system operates with optimal parameters, neither too much nor too little, thereby saving energy and maintaining good water quality.

[0061] Furthermore, in step S4 above, initiating temperature adjustment measures includes:

[0062] When the water temperature is greater than or equal to the first temperature, cooling measures are initiated to adjust the water temperature in the target area to be lower than the first temperature. When the water temperature is lower than the second temperature, heat preservation measures are initiated to adjust the water temperature in the target area to be greater than or equal to the second temperature or to increase the aeration rate.

[0063] Specifically, by initiating cooling or insulation measures in real time based on water temperature, the system ensures that the water temperature remains within a suitable range, thus promoting dissolved oxygen levels and maintaining biological activity. Simultaneously, adjusting the aeration rate as an auxiliary measure can influence water temperature to some extent and regulate dissolved oxygen concentration, achieving multiple control objectives. This refinement makes the self-regulation of water temperature more precise and flexible, improving the adaptability and effectiveness of the overall dissolved oxygen concentration and water quality control methods. It also demonstrates the advantages of this method in real-time monitoring, intelligent decision-making, and multi-functional control.

[0064] Furthermore, the water change procedure includes:

[0065] The temperature of the water to be entered into the target area is taken as the third temperature, and the temperature of the water in the target area is taken as the fourth temperature. The temperature difference between the third temperature and the fourth temperature is calculated. When the temperature difference is greater than or equal to the preset temperature difference, a cooling agent is added to the water to be entered into the target area. When the temperature difference is less than the preset temperature difference, a heating agent is added to the water to be entered into the target area.

[0066] Specifically, by calculating the temperature difference and adding cooling or heating agents according to the above methods, the temperature of newly introduced water in the target area can be precisely controlled, avoiding adverse effects of sudden temperature changes on water quality and biological activity. This strategy improves the precision and flexibility of water exchange operations, ensures a smooth transition in water temperature, helps maintain good water quality and biological ecological balance, and enhances the performance and effectiveness of the entire water quality management system.

[0067] Furthermore, the above-mentioned aeration system testing also includes:

[0068] At a preset second time interval, dissolved oxygen data of the target area is obtained as the fourth dissolved oxygen data at a preset first time interval. The dissolved oxygen concentration is obtained from the fourth dissolved oxygen data. Based on the comparison result between the dissolved oxygen concentration and the standard value of dissolved oxygen concentration, the aeration rate of the aeration equipment is adjusted. After adjusting the aeration rate, the aeration system is started for detection once every preset first time interval.

[0069] Specifically, during the continuous monitoring and adjustment of the aeration system, to ensure that the dissolved oxygen concentration remains within the ideal range, dissolved oxygen data is periodically acquired and compared with standard values. This allows the system to promptly detect water quality changes and take corresponding adjustment measures, thus benefiting the survival of aquatic organisms and maintaining water quality stability. This refined process makes the detection and adjustment of the aeration system more scientific, precise, and efficient, improving the response speed and stability of the entire water quality management system.

[0070] Furthermore, adjusting the aeration rate of the aeration equipment includes:

[0071] When the dissolved oxygen concentration is less than or equal to the standard value of dissolved oxygen concentration, the standard aeration rate is set to be equal to the current aeration rate of the aeration equipment.

[0072] Furthermore, adjusting the aeration rate of the aeration equipment also includes:

[0073] When the dissolved oxygen concentration is greater than the standard value, set the current aeration rate of the aeration equipment to be equal to the standard aeration rate.

[0074] Specifically, when adjusting the aeration rate of the aeration equipment, the system employs the aforementioned strategy based on a comparison of the dissolved oxygen concentration with the standard value to ensure that the aeration rate accurately meets water quality requirements. By adjusting the aeration rate according to the comparison of the dissolved oxygen concentration with the standard value, the system ensures that the aeration rate is always maintained within an appropriate range, neither too much nor too little. This strategy helps improve the efficiency and accuracy of water quality regulation while reducing unnecessary energy consumption and negative environmental impacts.

[0075] In summary, this invention periodically acquires dissolved oxygen data of the target area from a dissolved oxygen monitoring device at a preset first time interval. This first dissolved oxygen data includes dissolved oxygen concentration and water temperature. A first dissolved oxygen concentration difference is calculated based on this first dissolved oxygen data. When this first dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold, the aeration control system is activated, ensuring timely intervention when dissolved oxygen concentration is insufficient. The aeration control system issues an aeration rate adjustment command to increase the aeration rate in the target area. After a preset time, it periodically acquires dissolved oxygen data of the target area from the dissolved oxygen monitoring device again at the preset first time interval as second dissolved oxygen data. A standard dissolved oxygen concentration value is set based on this second dissolved oxygen data. A second dissolved oxygen concentration difference is also calculated based on this standard value, and a standard aeration rate is obtained. The aeration control system controls the aeration equipment to output an aeration rate equal to the standard aeration rate. An aeration system test is performed every preset second time interval to check the effectiveness of aeration. By precisely adjusting the aeration rate, the dissolved oxygen concentration is ensured to reach the preset standard.

[0076] Aeration is tested at a preset second time interval. During the test, dissolved oxygen data of the target area is periodically acquired from the dissolved oxygen monitoring device at a preset first time interval as the third dissolved oxygen data. The third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. If the third dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, the aeration is determined to be ineffective, and the aeration rate is increased again. If the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the aeration is determined to be effective, and water temperature adjustment is performed. This method can promptly detect and resolve the problem of ineffective aeration, avoiding energy waste and environmental pollution caused by ineffective aeration.

[0077] Furthermore, by controlling the water temperature to initiate a self-regulating process, the water temperature is obtained from the third dissolved oxygen data, and temperature adjustment measures are activated. When aeration is effective and the third dissolved oxygen concentration difference is less than a preset dissolved oxygen concentration difference threshold, the water temperature in the target area is adjusted to the target temperature to further improve water quality and dissolved oxygen conditions, enhance the biological activity of the water body, and promote the healthy development of the ecosystem. Through the coordination of the above steps, this invention can ensure that the dissolved oxygen concentration in the water body is maintained within the set optimal range, thereby reducing energy consumption and operating costs.

[0078] It should be understood that although the steps in the flowcharts of the various embodiments of the present invention are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the various embodiments may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0079] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0080] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling the concentration of dissolved oxygen applied to an aeration oxygenation system, wherein a target area is set in a water body, and a dissolved oxygen monitoring device is installed in the target area, characterized in that, The method includes the following steps: Step S1: The control unit periodically acquires dissolved oxygen data of the target area from the dissolved oxygen monitoring device based on a preset first time interval as first dissolved oxygen data. The first dissolved oxygen data includes dissolved oxygen concentration and water temperature. The first dissolved oxygen concentration difference is calculated based on the first dissolved oxygen data. When the first dissolved oxygen concentration difference is greater than or equal to a preset dissolved oxygen concentration difference threshold, step S2 is executed to start the aeration control system. Step S2: The aeration control system issues an aeration volume adjustment command to increase the aeration volume to the target area. After a preset time, based on the preset first time interval, it periodically obtains the dissolved oxygen data of the target area from the dissolved oxygen monitoring device as the second dissolved oxygen data. Based on the second dissolved oxygen data, it sets a standard value for dissolved oxygen concentration and calculates a second dissolved oxygen concentration difference based on the standard value. It also obtains the standard aeration volume. The aeration control system controls the aeration device to output aeration equal to the standard aeration volume and performs an aeration system test every preset second time interval to check whether the aeration is effective. Step S3: When performing aeration system testing, a test is performed every preset second time interval. During the test, dissolved oxygen data of the target area is periodically acquired from the dissolved oxygen monitoring device at the preset first time interval as third dissolved oxygen data. A third dissolved oxygen concentration difference is calculated based on the third dissolved oxygen data. When the third dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference threshold, the aeration is determined to be invalid, and step S2 is executed. When the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the aeration is determined to be valid, and step S4 is executed, wherein the preset second time interval is greater than the preset first time interval. Step S4: The control unit controls the water temperature to enter the self-regulation process, obtains the water temperature from the third dissolved oxygen data, and starts temperature adjustment measures. When aeration is effective and the third dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference threshold, the water temperature of the target area is adjusted to the target temperature. The process after step S4 further includes: Step S5: During the water temperature self-regulation process, if the water temperature in the target area is greater than or equal to the first temperature or less than the second temperature, and the dissolved oxygen concentration in the third dissolved oxygen data is decreasing, an early warning is issued. If the water temperature self-regulation is not performed or the water temperature self-regulation is ineffective, the aeration rate of the aeration equipment is reduced to half of the most recent aeration rate. If the aeration rate has been adjusted to the minimum value of the aeration equipment at this time, an emergency command is issued, and a water exchange operation is performed on the target area. During the water exchange operation, the water exchange volume is less than or equal to N percent of the total water volume in the target area. After the water exchange operation, the dissolved oxygen concentration is detected again. If the re-detected dissolved oxygen concentration still does not increase, an abnormal alarm is issued, and further detection is performed. N represents a positive integer greater than or equal to 50 and less than 100. The water exchange operation includes: taking the temperature of the water to be entered into the target area as the third temperature, taking the temperature of the water in the target area as the fourth temperature, calculating the temperature difference between the third temperature and the fourth temperature, adding a cooling agent to the water to be entered into the target area when the temperature difference is greater than or equal to a preset temperature difference, and adding a heating agent to the water to be entered into the target area when the temperature difference is less than the preset temperature difference. The aeration system detection also includes: at the interval of the preset second time interval, obtaining the dissolved oxygen data of the target area as the fourth dissolved oxygen data at the preset first time interval, obtaining the dissolved oxygen concentration from the fourth dissolved oxygen data, adjusting the aeration rate of the aeration device based on the comparison result of the dissolved oxygen concentration in the fourth dissolved oxygen data and the standard value of dissolved oxygen concentration, and continuing to start the aeration system detection once every time the preset second time interval after adjusting the aeration rate; Adjusting the aeration rate of the aeration device further includes: when the dissolved oxygen concentration is greater than the standard value of dissolved oxygen concentration, setting the current aeration rate of the aeration device to be equal to the standard aeration rate; In step S2, setting the standard value of dissolved oxygen concentration includes: calculating the average value of all dissolved oxygen concentrations in the second dissolved oxygen data, and also calculating the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the average value, and taking the dissolved oxygen concentration with the smallest difference from the average value as the standard value of dissolved oxygen concentration; In step S2, obtaining the aeration standard amount includes: calculating the difference between each dissolved oxygen concentration in the second dissolved oxygen data and the dissolved oxygen concentration standard value, obtaining multiple second dissolved oxygen concentration differences, and when any one of the multiple second dissolved oxygen concentration differences is less than the preset dissolved oxygen concentration difference threshold, the aeration amount when obtaining the second dissolved oxygen data of the target area is taken as the aeration standard amount.

2. The method of claim 1, wherein, In step S1, calculating the first dissolved oxygen concentration difference includes: obtaining the maximum value and the minimum value of the dissolved oxygen concentration from the first dissolved oxygen data, calculating the difference between the maximum value and the minimum value of the dissolved oxygen concentration and using it as the first dissolved oxygen concentration difference.

3. The method of claim 1, wherein, In step S4, initiating temperature adjustment measures includes: when the water temperature is greater than or equal to the first temperature, initiating cooling measures to adjust the water temperature of the target area to be lower than the first temperature; and when the water temperature is lower than the second temperature, initiating heat preservation measures to adjust the water temperature of the target area to be greater than or equal to the second temperature or increasing the aeration rate.

4. The method according to claim 1, characterized in that, Adjusting the aeration rate of the aeration device includes: when the dissolved oxygen concentration is less than or equal to the standard value of the dissolved oxygen concentration, setting the standard aeration rate to be equal to the current aeration rate of the aeration device.

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