A wastewater purification intelligent monitoring system and method based on deep learning

Abstract

The present invention discloses a wastewater purification intelligent monitoring system and method based on deep learning, which belongs to the field of wastewater purification intelligent monitoring technology. The system includes: a sample collection data module, a water quality analysis data calculation module, a drug management module, and an intelligent analysis module; the output end of the sample collection data module is electrically connected to the input end of the water quality analysis data calculation module, the output end of the water quality analysis data calculation module is electrically connected to the input end of the intelligent analysis module, and the output end of the intelligent analysis module is electrically connected to the input end of the drug management module. The present invention can solve the problem that the accuracy of the calculation of the dosage of the drug is not high when the tonnage of the purified water level is too large. Through two sampling detection data, the drug rate and material rate are obtained, and the maximum value is taken as the predicted time. The prediction method is used for detection, which avoids the loss of the sample collection device caused by high-frequency sampling, and also accurately controls the use of the drug dosage, which is directly significantly improved in efficiency and speed.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent monitoring of wastewater purification, and specifically to a system and method for intelligent monitoring of wastewater purification based on deep learning. Background Art

[0002] Water is the source of life and is vital to human survival and development. It maintains ecological functions and biodiversity. It is also the main resource for agricultural and industrial production. According to scientific calculations, less than 1% of the fresh water on Earth is available for human use. Therefore, the reusability of water is particularly important.

[0003] However, in the process of water purification, the efficiency and speed of purification naturally become the focus of the entire process of wastewater purification. In daily life or industry, there are many ways to purify wastewater, such as chemical purification. When using chemical agents for purification, due to the high tonnage of purified water, the dosage of the agent required to be added is large, resulting in large errors, so the calculated dosage data is not accurate enough, too little or too much will affect the effect of the entire wastewater purification. Summary of the invention

[0004] The purpose of the present invention is to provide a wastewater purification intelligent monitoring system and method based on deep learning to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a wastewater purification intelligent monitoring method based on deep learning, the method comprising the following steps:

[0006] Step S1, building a wastewater purification intelligent monitoring platform, wherein the wastewater purification intelligent monitoring platform includes a sample collection device, a chemical agent injection device and a visual digital display device;

[0007] The sample collection device is installed in the biochemical pool and is used to collect wastewater in the biochemical pool;

[0008] The chemical agent injection device is installed in the biochemical pool, and when receiving the instruction from the terminal control, it performs the corresponding operation and returns the injection dosage, time and status to the control terminal;

[0009] The visual digital display device is installed in the terminal control room, and through the electrical connection with the sample collection device and the chemical agent injection device, the status of the chemical agent injection device, wastewater data and operable instructions are fed back in real time;

[0010] Step S2, using a sample collection device to collect wastewater that needs to be purified, performing water quality testing on the collected wastewater, and storing the obtained data;

[0011] Step S3, constructing a water quality analysis data calculation model, transmitting the data obtained from the water quality test to the water quality analysis data calculation model, and calculating the dosage of the agent required for the current wastewater purification and the time required to complete the purification;

[0012] Step S4, using the calculation results of the water quality analysis data calculation model, an injection instruction is sent to the chemical agent injection device to add a specified amount of agent into the biochemical pool. After receiving the calculation results, the visual digital display device digitally displays the data.

[0013] Further, according to the above technical solution, in step S2, it also includes: calculating the five parameters required for water quality judgment including chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus;

[0014] The chemical oxygen demand used in the water quality analysis data calculation model is used to determine the content of reducing substances in the water quality. By comparing the calculations before and after the set time period, the trend of reducing substances is calculated as one of the prediction bases. The chemical oxygen demand removal rate calculation formula is as follows:

[0015]

[0016] In the formula It is expressed as the rate of change during the time period of inlet and outlet. COD inlet represents the chemical oxygen demand concentration of the wastewater before treatment, while COD outlet represents the chemical oxygen demand concentration of the wastewater after treatment. The chemical oxygen demand removal rate in the time period is used as one of the prediction bases. The removal rate is calculated by the chemical oxygen demand values ​​of the first sampling test and the chemical oxygen demand values ​​of the second sampling test. The water quality is judged by the removal rate. A threshold C is set. When the value of the chemical oxygen demand removal rate is less than the set threshold C, it means that the added agent dosage is insufficient during the time period, resulting in the chemical oxygen demand removal rate not meeting the standard, and the corresponding agent and dosage need to be added to the biochemical pool.

[0017] The biochemical oxygen demand in water quality is used to determine the amount of dissolved oxygen that microorganisms in water can dissolve. The formula used to calculate biochemical oxygen demand is:

[0018] ,

[0019] Among them, BOD is biochemical oxygen demand, the unit is mg / L; D0i is the initial dissolved oxygen concentration, the unit is mg / L; DOf is the dissolved oxygen concentration during the dissolved oxygen consumption process, the unit is mg / L; dilution_factor is the dilution factor; k is the biodegradation coefficient, usually taken as 0.23; set the threshold B. When the value of biochemical oxygen demand exceeds the set threshold B, it means that the current stage of sewage purification effect does not meet the standard. It is also necessary to calculate the required chemical agent dosage and agent type according to the water quality analysis data calculation model, and continue to add agents to the biochemical pool. When the value of biochemical oxygen demand is less than or equal to the set threshold B, it means that the current sewage purification effect meets the filtration standard;

[0020] Total nitrogen and total phosphorus are directly detected from the sampled samples by the total nitrogen measuring instrument and the total phosphorus measuring instrument respectively. The data are transmitted to the water quality analysis calculation model through electrical connection. The rate is obtained through the parameter calculation of the two samplings and used to calculate the prediction time.

[0021] According to the above technical solution, total nitrogen is the key parameter for balancing water quality. It is the total amount of organic and inorganic nitrogen in various forms in water. The formula for calculating total nitrogen is as follows:

[0022] ,

[0023] In the formula, NH3-N represents the concentration of ammonia nitrogen in water, in mg / L; V1 represents the sampling volume, in mL; C1 represents the concentration of the titrant, in mol / L; V2 represents the amount of the titrant, in mL; C2 represents the number of moles corresponding to the amount of the titrant, in mol; V3 represents the actual value of the sampling volume, in L, and a threshold value NH is set. When the calculated ammonia nitrogen value is less than the set threshold value NH, it means that the dosage of the added agent is insufficient during the time period, resulting in the ammonia nitrogen content in the wastewater not meeting the standard, and the corresponding agent and dosage need to be added to the biochemical pool;

[0024] Furthermore, according to the above technical solution, it is also necessary to calculate the dosage of the drug using the following formula:

[0025] ,

[0026] In the formula, Dosage represents the amount of addition, It indicates how many milligrams of chemical agents are contained in each liter of wastewater, C represents the mass concentration of pollutants, mg represents the mass of the specified chemical substances added, and Q represents the water flow rate. The dosage of different agents required is calculated based on the different wastewater content substances.

[0027] The calculation of the time required for purification to complete includes: the calculation of the rate of change of the substance and the calculation of the rate of the agent:

[0028] According to the above technical solution, the values ​​of chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus can be obtained, the time of the first sampling test is set to t0, the time of the second sampling test is set to t1, the mass mark of the first sampling substance is the substance name followed by the letter _A, the residual mark of the second sampling substance is the substance name followed by the letter _B, the time of the first sampling test is set to t0, the time of the second sampling test is set to t1, and the is the rate of change of the substance in the most consuming time period. The calculation process for the rate of change of chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus is:

[0029] ,

[0030] Enter chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus into the material parameters in turn, according to the time period The rate of change of each substance content is calculated using the following formula:

[0031] ,

[0032] ,

[0033] ,

[0034] ,

[0035] ,

[0036] In the above formula, chemical oxygen demand is expressed as COD, and the rate of change is ; Biochemical oxygen demand is expressed as BOD, and the rate of change is ; Total phosphorus is expressed as TP, and the rate of change is ; Ammonia nitrogen is expressed as NH3-A and the rate of change is , which is used to calculate the time required for purification to complete.

[0037] Further, according to the above technical solution, the process of calculating the dosage rate is as follows:

[0038] Step 1: Take samples for the first time and calculate the substance content in the wastewater and the dosage of the reagent to be used based on the sample data. The recorded data include: the injection time of the reagent and the dosage of the reagent used;

[0039] Step 2: The second sampling test is to calculate the substance content in the wastewater and the dosage of the reagent to be used according to the sample data. The second sampling data record includes: the injection time of the reagent and the dosage of the reagent used;

[0040] Step 3: Use the difference between the first recorded injection dose and the second recorded dose as the dose consumption, and use the symbol The consumption rate of the agent is expressed as the agent consumption divided by the time difference between the first sampling test and the second sampling test, and is expressed as Indicates that the dosage rate calculation formula is as follows:

[0041] ,

[0042] S4-3. The time required to complete the purification in step S3 is calculated as follows:

[0043] ,

[0044] In the formula is the maximum value of the predicted time for the wastewater substance content to meet the standard, m represents the substance content, M is the corresponding value of the national water quality detection comprehensive index, and the substance content chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus are substituted into m and the corresponding standard value M for calculation. The difference between the detected substance content and the substance standard is divided by the value of the substance change rate as the time required for the wastewater purification to be completed. The maximum value of

[0045] ,

[0046] In the formula is the maximum value of the predicted time, that is, the time when the drug is completely consumed, and d is the remaining amount of the drug. It is expressed as the reaction rate of the agent. The value obtained by dividing the agent consumption in the two time periods by the time difference and the value obtained by dividing the agent's remaining amount by the rate obtained by the agent is the time required for the wastewater purification to be completed. The maximum value of

[0047] by To predict the time, The maximum value of the size ratio occurs when the time from the second sample collection has passed When the time comes, the wastewater purification intelligent monitoring platform will drive the sample collection device again and transmit the data to the water quality analysis data calculation model to analyze the water quality of the water source in the biochemical pool and detect the water quality by predicting the way to prevent the loss caused by high-frequency sampling of the sample collection device and the dosage of the agent used to be accurately controlled;

[0048] Further, according to the above technical solution, the chemical agent injection device and the visual digital display device method are as follows: when the chemical agent injection device receives the instruction from the terminal control, it performs the corresponding operation and returns the injection dosage, time and status to the control terminal; the visual digital display device is electrically connected with the sample collection device and the chemical agent injection device to provide real-time feedback on the status of the device, the waste sample collection data module, the water quality analysis data calculation module, the agent management module, and the intelligent analysis module;

[0049] The output end of the sample collection data module is electrically connected to the input end of the water quality analysis data calculation module, the output end of the water quality analysis data calculation module is electrically connected to the input end of the intelligent analysis module, and the output end of the intelligent analysis module is electrically connected to the input end of the drug management module.

[0050] The sample collection data module is used for parameter analysis of wastewater samples;

[0051] The water quality analysis data calculation module is used to calculate the wastewater index parameters per unit volume;

[0052] The medicine management module is used to record the dosage and time of medicine use and the status feedback of the execution command;

[0053] The intelligent analysis module is used to calculate the dosage of the corresponding medicine and send system instructions to each module.

[0054] The sample collection data module contains a sampling unit and an instrument feedback unit: the sampling unit is used to sample wastewater samples in the biochemical pool and transmit the obtained data to the water quality analysis data calculation module for calculation; the instrument unit refers to the data feedback of the electrically connected total nitrogen and total phosphorus measuring device; the water quality analysis data calculation module is used to calculate from the data in the sample collection data module, and it is necessary to calculate the chemical oxygen demand, biochemical oxygen demand and ammonia nitrogen in the water quality, and transmit the results to the intelligent analysis module to calculate the required dosage through the data.

[0055] According to the technical solution, the intelligent analysis module included in the system of the present invention is composed of a drug monitoring unit and an intelligent instruction unit. The drug monitoring unit directly performs proportional calculation on the data transmitted from the water quality analysis data calculation module and the parameters in the large database to calculate the dosage of each drug; the intelligent instruction unit sends instructions to each module after receiving the system instructions.

[0056] The drug management module includes a drug unit and an injection unit: the drug unit is used to record the time and dosage of the current drug injection; the injection unit receives the instruction of the intelligent analysis module, injects the specified dosage of the drug into the biochemical pool, and completes the specified operation.

[0057] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention can solve the problem of low accuracy in calculating the dosage of the reagent when the tonnage of purified water is too large, and calculates the reagent rate and the material rate through two sampling and detection data, and takes the maximum value as the predicted time, that is, the time required for the wastewater purification to be completed, and uses the prediction method to perform staged sampling and detection of the wastewater quality, thereby avoiding the loss of the sample collection device caused by high-frequency sampling and detection, and also accurately controls the use of the reagent dosage, which directly improves the efficiency and speed significantly. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0059] Figure 1 It is a flow chart of a wastewater purification intelligent monitoring method based on deep learning of the present invention. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] See also Figure 1 In the first embodiment of the present invention, a deep learning-based intelligent monitoring method for wastewater purification is provided: the method comprises: firstly obtaining a wastewater sample to be purified by a sample collection device, and issuing corresponding instructions to a drug management device through a system program calculation and analysis method based on the sample parameters, so that the device replaces the manual operation of adding drugs to the biochemical pool.

[0062] The sample collection device needs to collect quantitative data from the biochemical pool at the time set by the system program, which is the main way to obtain data sources for intelligent monitoring of wastewater purification. In addition, it needs to be electrically connected to the total nitrogen meter and the total phosphorus meter. The total nitrogen content and total phosphorus content of the wastewater in the current biochemical pool can be directly detected by the instrument, and the above content parameters of the sample can be transmitted to the water quality analysis data calculation module for water quality analysis calculation.

[0063] Upon receiving the instruction sent by the system program, the drug management device will immediately perform the corresponding instruction operation and add the set dosage of the drug to the biochemical pool currently used for wastewater purification.

[0064] According to the water quality judgment, it is necessary to use the water quality analysis data calculation model in the system to calculate the chemical oxygen demand, biochemical oxygen demand and ammonia nitrogen content:

[0065] Chemical oxygen demand is used to determine the content of reducing substances in water quality. By comparing and calculating before and after a set time period, the trend of reducing substances is calculated as one of the prediction bases. The calculation formula for the removal rate of chemical oxygen demand is as follows:

[0066] ,

[0067] In the formula It is expressed as the rate of change during the time period of inlet and outlet. COD inlet represents the chemical oxygen demand concentration of the wastewater before treatment, while COD outlet represents the chemical oxygen demand concentration of the wastewater after treatment. The chemical oxygen demand removal rate in the time period is used as one of the prediction bases, and a threshold C is set. When the value of the chemical oxygen demand removal rate is less than the set threshold C, it means that the added agent dosage is insufficient during the time period, resulting in the chemical oxygen demand removal rate not meeting the standard, and a specified amount of agent dosage needs to be added to the biochemical pool;

[0068] The biochemical oxygen demand in water quality is used to determine the amount of dissolved oxygen that microorganisms in water can dissolve. The formula used to calculate biochemical oxygen demand is:

[0069] ,

[0070] Among them, BOD is biochemical oxygen demand, the unit is mg / L; D0i is the initial dissolved oxygen concentration, the unit is mg / L; DOf is the dissolved oxygen concentration during the dissolved oxygen consumption process, the unit is mg / L; dilution_factor is the dilution factor; k is the biodegradation coefficient, usually taken as 0.23; set the threshold B. When the calculated value of biochemical oxygen demand exceeds the set threshold B, it means that the current stage of sewage purification effect does not meet the standard. It is also necessary to calculate the required chemical agent dosage and agent type according to the water quality analysis data calculation model, and continue to add agents to the biochemical pool. When the calculated value of biochemical oxygen demand is less than or equal to the set threshold B, it means that the current sewage purification effect meets the filtration standard;

[0071] Ammonia nitrogen is a key parameter for balancing water quality. It is the total amount of organic and inorganic nitrogen in various forms in water. The formula for calculating total nitrogen is as follows:

[0072] ,

[0073] In the formula, NH3-N represents the concentration of ammonia nitrogen in water, in mg / L; V1 represents the sampling volume, in mL; C1 represents the concentration of the titrant, in mol / L / ; V2 represents the amount of the titrant, in mL; C2 represents the number of moles corresponding to the amount of the titrant, in mol; V3 represents the actual value of the sampling volume, in L, and a threshold value NH is set. When the calculated ammonia nitrogen value is less than the set threshold value NH, it means that the dosage of the added agent is insufficient during the time period, resulting in the ammonia nitrogen content in the wastewater not meeting the standard, and the corresponding agent and dosage need to be added to the biochemical pool;

[0074] According to the above water quality analysis data calculation model, the values ​​of chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus can be obtained. The time of the first sampling test is set to t0, and the time of the second sampling test is set to t1. The mass of the first sampling substance is marked with the substance name followed by the letter _A, and the residual amount of the second sampling substance is marked with the substance name followed by the letter _B. is the rate of change of the substance in the most consuming time period. The calculation process for the rate of change of chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus is:

[0075]

[0076] Enter chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus into the material parameters in turn, according to the time period The rate of change of each substance content is calculated using the following formula:

[0077] ,

[0078] ,

[0079] ,

[0080] ,

[0081] ,

[0082] Calculate the rate of change , , , and , used to calculate the time required to complete the purification;

[0083] For example, wastewater purification has gone through two purification processes in the grit tank and the primary sedimentation tank. Now the wastewater purification comes to the biochemical pool for chemical purification. The sample collection device will take a specified amount of samples after all the wastewater has entered the biochemical pool and reached a stable state. The collected samples will be collected and transmitted to the water quality analysis data calculation model.

[0084] The water quality analysis model will calculate the data obtained from the sample collection, calculate the required drugs and dosages through the system program, and send the results to the intelligent analysis module, which includes the instrument receiving parameter unit and the program water quality parameter calculation unit:

[0085] The instrument receiving unit directly checks the data transmitted from the instrument with the parameters in the large database. The program water quality parameter calculation unit calculates the measured substances in the sample, obtains the content and the required dosage of the medicine, makes a correct judgment, and sends corresponding instructions to the digital display device and the medicine management module to complete the system process.

[0086] Then, according to the time set by the system, a second sample collection is carried out, and a second water quality test is carried out according to the above technical solution. In addition to the above, a speed calculation is carried out through the difference between the two reagent consumption and the comprehensive water quality index test, and the parameter that takes the longest time is selected as the standard for the entire wastewater purification. After the second sampling test calculation, according to the time predicted by the water quality analysis data calculation model, the system sets the next sample collection test according to the predicted time. According to the above technical solution, it can be concluded that , , , and The value is then compared from the five values ​​to select the maximum value, which represents the most difficult and easiest substance to be solved and takes the longest time. It is used as the standard for the completion of the wastewater purification this time, and its rate and margin are calculated. The obtained time is the predicted time. When the predicted time is reached, water quality testing is performed again to determine the water quality standard. If the comprehensive water quality index is met, the monitoring is completed and the next round of intelligent wastewater purification monitoring is carried out. Otherwise, the water quality analysis data calculation model is used to calculate and continue to add the specified agent and agent dosage to the biochemical pool. If the ammonia nitrogen content is found to be low after the second sample collection and testing, the system program can calculate that a certain amount of nitrifying bacteria needs to be added to increase the ammonia nitrogen content in the chemical purification.

[0087] According to the above scheme, testing water quality during the predicted time period can prevent insufficient dosage due to calculation accuracy problems during the dosage process, which will increase the time consumption of the entire wastewater purification process, avoid losses caused by high-frequency sampling and detection of instruments, and reduce errors in one-time dosage, thereby improving the efficiency and speed of the entire wastewater purification project.

[0088] The sample collection data module includes a sampling unit and an instrument feedback unit; the function is to take samples and calculate the water quality of the wastewater currently purified through parameters.

[0089] The water quality analysis data calculation module is used to calculate the data in the sample collection data module. It is necessary to calculate the chemical oxygen demand, biochemical oxygen demand, and ammonia nitrogen in the water quality. The function is used to judge the dosage and type of the reagent, and to calculate the time required for the wastewater purification as the predicted time through the calculation of the rate.

[0090] The intelligent medicine monitoring unit records the dosage of medicine used to prevent the medicine in the medicine injection device from being used up and not being replenished in time; the intelligent instruction unit sends instructions to each module after receiving the system instruction. Example

[0091] For example, if 1000L of wastewater needs to be purified, the target dose is 30mg / L, and the mass concentration of the pollutant is 20mg / L, then the calculation formula is as follows:

[0092] ,

[0093] In the formula, It is expressed as the dosage of the drug to be added, in units of , through the above calculation, it can be obtained that 600 mg of the agent dosage needs to be added to treat the current 1000L of wastewater.

[0094] The first dose was 600 mg, and the second test was conducted 5 hours later, and the remaining amount of the drug detected was 100 mg.

[0095] The rate is (600-100) / 5=100mg / hour. Based on the remaining 100mg of the drug, the required = 1 hour to completely purify the wastewater;

[0096] In the material calculation, if it is determined that the biochemical oxygen demand treatment time is the longest, according to the formula:

[0097]

[0098] Among them, BOD is biochemical oxygen demand, the unit is mg / L; D0i is the initial dissolved oxygen concentration, the unit is mg / L; DOf is the dissolved oxygen concentration during the dissolved oxygen consumption process, the unit is mg / L; dilution_factor is the dilution factor; k is the biodegradation coefficient, usually taken as 0.23; set the threshold to 50mg / L, the initial dissolved oxygen concentration is 60.5, the dissolved oxygen concentration during the dissolved oxygen consumption process is 45.5, the BOD value of the first detection is 13mg / L, the calculation process of biochemical oxygen demand is:

[0099] 0.23

[0100] The biochemical oxygen demand value is 23 mg / L. The interval between two samplings is 1 hour. The BOD rate can be obtained from the obtained data as follows: 4 hours;

[0101] According to the calculation of the above scheme, the longest time for the reagents is 1 hour, and among the material reaction rates, the longest time is the biochemical oxygen demand, which takes 4 hours. According to the technical scheme, the maximum value is taken as the predicted time, that is, the material change time is 4 hours, and then the wastewater sampling and testing is carried out after another 4 hours, which reduces the number of frequent regular testing in the middle. The water quality is tested according to the predicted time to prevent the calculation error of the one-time injection of the reagent from increasing, thereby increasing the accuracy of the reagent use.

[0102] The present invention uses a solution of predicting time to reduce the device loss caused by high-frequency sampling of a sample collection device and a method of fixed-point detection of water quality to achieve precise calculation of the control of the agent.

[0103] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0104] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wastewater purification intelligent monitoring method based on deep learning, characterized in that: The method comprises the following steps: Step S1, building a wastewater purification intelligent monitoring platform, wherein the wastewater purification intelligent monitoring platform includes a sample collection device, a chemical agent injection device and a visual digital display device; The sample collection device is installed in the biochemical pool and is used to collect wastewater in the biochemical pool; The chemical agent injection device is installed in the biochemical pool, and when receiving the instruction from the terminal control, it performs the corresponding operation and returns the injection dosage, time and status to the control terminal; The visual digital display device is installed in the terminal control room, and through the electrical connection with the sample collection device and the chemical agent injection device, the status of the chemical agent injection device, wastewater data and operable instructions are fed back in real time; Step S2, using a sample collection device to collect wastewater that needs to be purified, performing water quality testing on the collected wastewater, and storing the obtained data; The calculation process of water quality detection is: S2-1. Comprehensive indicators for judging water quality include chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus; S2-2. Chemical oxygen demand is used to determine the content of reducing substances in water quality. By calculating and comparing before and after a set time period, the consumption trend of reducing substances is calculated as one of the prediction bases. The calculation formula for the removal rate of chemical oxygen demand is as follows: ， In the formula It is expressed as the rate of change during the time period of inlet and outlet. COD inlet represents the chemical oxygen demand concentration of the wastewater before treatment, while COD outlet represents the chemical oxygen demand concentration of the wastewater after treatment. The chemical oxygen demand removal rate in the time period is used as one of the prediction bases, and a threshold C is set. When the value of the chemical oxygen demand removal rate is less than the set threshold C, it means that the added agent dosage is insufficient during the time period, resulting in the chemical oxygen demand removal rate not meeting the standard, and a specified amount of agent dosage needs to be added to the biochemical pool; S2-3. Biochemical oxygen demand is used to determine the amount of dissolved oxygen that microorganisms in water can dissolve. The formula used to calculate biochemical oxygen demand is: ， Among them, BOD is biochemical oxygen demand; D0i is the initial dissolved oxygen concentration; DOf is the dissolved oxygen concentration during the dissolved oxygen consumption process; dilution_factor is the dilution factor; k is the biodegradation coefficient; set the threshold B; calculate the value of biochemical oxygen demand and threshold B for judgment, and make corresponding instructions; S2-4, total nitrogen content = ammonia nitrogen content + organic nitrogen content + nitrate nitrogen content + nitrite nitrogen content + other forms of nitrogen content. The nitrogen content can be collected by the sample collection device and then measured by the total nitrogen measuring instrument to obtain the parameters; S2-5, total phosphorus content can be obtained using the total phosphorus tester of the device; S2-6. The calculation formula for ammonia nitrogen in wastewater is as follows: ， In the formula, NH3-N represents the concentration of ammonia nitrogen in water; V1 represents the sampling volume; C1 represents the concentration of the titration solution; V2 represents the amount of the titration solution; C2 represents the molar number l corresponding to the amount of the titration solution; V3 represents the actual value of the sampling volume, and a threshold value NH is set. When the value of the ammonia nitrogen content is less than the set threshold value NH, it is necessary to add the corresponding agent and dosage to the biochemical pool; Step S3, constructing a water quality analysis data calculation model, transmitting the data obtained from the water quality test to the water quality analysis data calculation model, and calculating the dosage of the agent required for the current wastewater purification and the time required to complete the purification; The process of calculating the time required to complete purification includes: calculation of the rate of change of the substance and calculation of the rate of the agent; S3-1. The calculation process of material change rate is: According to the wastewater substance content, the chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus values ​​are calculated to calculate the substance change rate. The substance content of the first sampling test is set as substance name_A, and the substance content of the second sampling test is set as substance name_B. The time of the first sampling test is set as t0, and the time of the second sampling test is set as t1. is the rate of change of the substance in the most consuming time period. The calculation process for the rate of change of chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus is: ， Enter chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus into the material parameters in turn, according to the time period The rate of change of each substance content is calculated using the following formula: ， ， ， ， ， Calculate the rate of change of chemical oxygen demand , biochemical oxygen demand change rate , , total phosphorus change rate and ammonia nitrogen change rate The value of is used to calculate the time required for purification to complete; S3-2, the dosage rate calculation process is: S3-2-1. Take samples for the first time and calculate the substance content in the wastewater and the dosage of the reagents to be used based on the sample data. The recorded data include: the time of injection of the reagents and the dosage of the reagents used; S3-2-2, the second sampling test, calculate the substance content in the wastewater and the dosage of the reagent to be used based on the sample data. The second sampling data record includes: the time of reagent injection and the dosage of the reagent used; S3-2-3. Use the difference between the first recorded injection dose and the second recorded dose as the dose consumption, and use the symbol The consumption rate of the agent is expressed as the agent consumption divided by the time difference between the first sampling test and the second sampling test, and is expressed as The dosage rate calculation formula is as follows: ， S3-3. The time required to complete the purification in step S3 is calculated as follows: ， In the formula is the maximum value of the predicted time for the wastewater substance content to meet the standard, m represents the substance content, M is the corresponding value of the national water quality detection comprehensive index, and the substance content chemical oxygen demand, biochemical oxygen demand, total nitrogen, ammonia nitrogen and total phosphorus are substituted into m and the corresponding standard value M for calculation. The difference between the detected substance content and the substance standard is divided by the value of the substance change rate as the time required for the wastewater purification to be completed. The maximum value of ， In the formula is the maximum value of the predicted time, that is, the time when the drug is completely consumed, and d is the remaining amount of the drug. It is expressed as the reaction rate of the agent. The value obtained by dividing the agent consumption in the two time periods by the time difference and the value obtained by dividing the agent's remaining amount by the rate obtained by the agent is the time required for the wastewater purification to be completed. The maximum value of by To predict the time, The maximum value of the size ratio occurs when the time from the second sample collection has passed When the time comes, the wastewater purification intelligent monitoring platform will drive the sample collection device again and transmit the data to the water quality analysis data calculation model to analyze the water quality of the water source in the biochemical pool and detect the water quality by predicting the way to prevent the loss caused by high-frequency sampling of the sample collection device and the dosage of the agent used to be accurately controlled; Step S4, using the calculation results of the water quality analysis data calculation model, an injection instruction is sent to the chemical agent injection device to add a specified amount of agent into the biochemical pool. After receiving the calculation results, the visual digital display device digitally displays the data.

2. According to claim 1, a wastewater purification intelligent monitoring method based on deep learning is characterized in that: In step S3, the dosage of the drug is calculated using the following formula: ， In the formula, Dosage represents the amount of addition, It indicates how many milligrams of chemical agents are contained in each liter of wastewater, C represents the mass concentration of the pollutant, mg represents the mass of the specified chemical substance added, and Q represents the water flow rate.

3. A monitoring system for a wastewater purification intelligent monitoring method based on deep learning as described in any one of claims 1-2, characterized in that: The monitoring system includes: a sample collection data module, a water quality analysis data calculation module, a drug management module and an intelligent analysis module; The output end of the sample collection data module is electrically connected to the input end of the water quality analysis data calculation module, the output end of the water quality analysis data calculation module is electrically connected to the input end of the intelligent analysis module, and the output end of the intelligent analysis module is electrically connected to the input end of the drug management module; The sample collection data module is used for parameter analysis of wastewater samples; The water quality analysis data calculation module is used to calculate the wastewater index parameters per unit volume; The medicine management module is used to record the dosage and time of medicine use and the status feedback of command execution; The intelligent analysis module is used to calculate the dosage of the corresponding medicine and send system instructions to each module.

4. The monitoring system according to claim 3, characterized in that: The sample collection data module includes a sampling unit and an instrument feedback unit; The sampling unit is used to sample wastewater in the biochemical pool and transmit the acquired data to the water quality analysis data calculation module for calculation; the instrument feedback unit is used to receive the detection and measurement data of total nitrogen and total phosphorus.

5. The monitoring system according to claim 3, characterized in that: The water quality analysis data calculation module includes: a substance content calculation unit, a substance rate calculation unit, a drug dosage calculation unit, a drug rate calculation unit and a prediction time calculation unit; The substance content calculation unit calculates the substance content in the wastewater according to the obtained wastewater detection data, and the substance content includes: chemical oxygen demand, biochemical oxygen demand and ammonia nitrogen; The material rate calculation unit calculates the material rate according to the material content difference and time between the first sampling and the second sampling; The drug dosage calculation unit calculates the corresponding drug dosage according to the substance content obtained by the substance content calculation unit; The drug rate calculation unit calculates the consumption rate of the corresponding drug according to the difference in drug content and time between the first sampling and the second sampling; The predicted time calculation unit obtains the predicted time according to the agent rate calculation unit and the material rate calculation unit as the time required for the wastewater purification to be completed.

6. The monitoring system according to claim 3, characterized in that: The intelligent analysis module includes a drug monitoring unit and an intelligent instruction unit: The medicine monitoring unit records the dosage of the medicine to prevent the medicine from being used up and not being replenished in time; The intelligent instruction unit sends instructions to each module after receiving the system instruction.

7. The monitoring system according to claim 3, characterized in that: The medicine management module includes a medicine unit and an injection unit: the medicine unit is used to record the time and dosage of the current injection of medicine; The injection unit receives instructions from the intelligent analysis module and injects the agent into the biochemical pool to complete the specified operation.

Images