Concentration tank supernatant recycling control method based on drainage tank air flotation transformation technology

Abstract

The invention discloses a concentration tank supernatant recycling control method based on a drainage tank air flotation transformation technology, and relates to the related field of supernatant recycling control, and the method comprises the following steps: carrying out primary treatment on a multi-source water body data set by using the air flotation transformation technology, generating a plurality of water body treatment data, and extracting concentration tank supernatant; and carrying out ultrafiltration membrane treatment on the supernatant of the concentration tank, generating an ultrafiltration membrane treatment result, putting the third supernatant into a tail water recovery tank for balanced adjustment, and carrying out intelligent reuse control on the supernatant based on an adjustment result. The technical problems that the safety and health of the sludge dewatering liquid are affected and the sludge dewatering liquid cannot be directly recycled due to the fact that the supernate and the sludge dewatering liquid of a traditional concentration tank are discharged are solved, the problems that the supernate and the sludge dewatering liquid of the concentration tank are difficult to recycle and no suitable discharge path exists are effectively solved, and the sludge water of a water supply plant is safely and stably recycled; and the technical effect of a'zero-emission 'operation management target of a water supply plant is achieved.

Description

Technical Field

[0001] The present application relates to the field related to supernatant reuse control, and in particular to a method for controlling supernatant reuse in a concentration tank based on a drainage tank flotation transformation technology. Background Art

[0002] As an important part of water supply projects, the main function of water supply plants is to produce drinking water that meets national standards and ensure the water demand for urban life and production. At present, most water supply plants adopt conventional treatment processes of coagulation, sedimentation, filtration and disinfection. When conventional processes are difficult to guarantee the water quality, the pollutant removal capacity is improved by adding deep treatment processes such as ozone-activated carbon treatment and membrane treatment to conventional processes. In the operation of water supply plants, the generated muddy water from reaction sedimentation tanks, filter tank backwash water and other production wastewater are collectively referred to as muddy water. The water consumption of muddy water accounts for about 3% to 8% of the daily treated water volume. In order to realize the reuse of muddy water, reduce the self-use rate of water plants, and strengthen the recycling of water resources, water supply plants usually set up muddy water treatment systems. At present, the mainstream and more complete muddy water treatment system is generally composed of adjustment, concentration, dehydration and other processes. Although this muddy water treatment method realizes the reuse of most muddy water, there is still the situation of supernatant from the concentration tank and sludge dehydration liquid being discharged, and it is impossible to achieve zero discharge of muddy water treatment. Summary of the invention

[0003] The present application provides a method for controlling the reuse of the supernatant of the thickening tank based on the flotation transformation technology of the drainage tank, so as to solve the technical problem that the supernatant of the traditional thickening tank and the sludge dewatering liquid are discharged externally, resulting in safety and health impacts on the sludge dewatering liquid and the inability to directly reuse it. The application solves the problem that the supernatant of the thickening tank and the sludge dewatering liquid are difficult to reuse and there is no suitable discharge route, thereby ensuring the safe and stable reuse of the sludge water discharged by the water supply plant and achieving the technical effect of the "zero emission" operation and management goal of the water supply plant.

[0004] The present application provides a method for controlling the reuse of supernatant from a concentration tank based on a drainage tank flotation modification technology, comprising: receiving multi-source water bodies through a drainage tank in a target area to obtain a multi-source water body data set; performing preliminary processing on the multi-source water body data set using the flotation modification technology to generate a plurality of water body treatment data; extracting supernatant from a concentration tank based on the plurality of water body treatment data, performing ultrafiltration membrane treatment on the supernatant from the concentration tank to generate an ultrafiltration membrane treatment result; placing a third supernatant in a tail water recovery tank based on the ultrafiltration membrane treatment result; performing balanced adjustment based on the tail water recovery tank, and performing intelligent reuse control on the supernatant based on the adjustment result.

[0005] In a possible implementation, based on the ultrafiltration membrane treatment result, the third supernatant is placed in front of the tail water recovery tank, and the following treatment is performed: the supernatant of the concentration tank after ultrafiltration membrane treatment is dehydrated by using a flocculant to obtain a mud-water separation result; a dehydrated liquid regulating tank is constructed, and the dehydrated liquid regulating tank is used to treat the mud-water separation result to generate a dehydration adjustment result; the dehydration adjustment result is analyzed to determine the dehydrated liquid and the bottom mud; the dehydrated liquid is purified by an ultrafiltration membrane treatment process to generate a first supernatant and backwash water; the bottom mud is transferred to the sludge balance tank for adjustment, and the sludge is dehydrated according to the sludge adjustment result to generate a second supernatant, backwash water, and mud cake; the backwash water is input into the drainage tank, the mud cake is transported out, and the first supernatant and the second supernatant are input into the biological activated carbon filter tank for treatment, and the third supernatant is generated according to the treatment result.

[0006] In a possible implementation, the following treatment is performed: inputting the backwash water into the drainage tank includes conveying the backwash water treated by ultrafiltration membrane to the drainage tank and storing the remaining backwash wastewater in the drainage tank for adjustment and flotation treatment.

[0007] In a possible implementation, the first supernatant and the second supernatant are input into a biological activated carbon filter for treatment, a third supernatant is generated according to the treatment result, and the following treatments are performed: the first supernatant and the second supernatant are subjected to activated carbon adsorption by the biological activated carbon filter to generate a first treatment result; the first supernatant and the second supernatant are subjected to biodegradation based on the first treatment result to generate a second treatment result; the first supernatant and the second supernatant are subjected to biocatalytic oxidation based on the second treatment result to generate a third treatment result; and the first treatment result, the second treatment result, and the third treatment result are subjected to data integration to generate the third supernatant.

[0008] In a possible implementation, balanced adjustment is performed based on the tail water recovery pool, and the following processing is performed: the effluent from the drainage pool, the effluent from the ultrafiltration membrane of the supernatant of the concentration pool, and the effluent from the biological activated carbon filter are uniformly collected to generate an effluent data set, and the effluent data set includes water quality information and water quantity information; the third supernatant is homogenized through the tail water recovery pool in combination with the water quality information to generate first adjustment information; the third supernatant is adjusted through the tail water recovery pool in combination with the water quantity information to generate second adjustment information; the first adjustment information and the second adjustment information are added to the adjustment result.

[0009] In a possible implementation, the supernatant is intelligently reused and controlled based on the adjustment result, and the following processing is performed: based on the adjustment result, the recovered water quality information and the recovered water quantity information of the tail water recovery pool are extracted; based on the first adjustment information, it is judged whether the recovered water quality information meets the expected water quality standard, and based on the second adjustment information, it is judged whether the recovered water quantity information meets the expected water quantity standard; if the recovered water quality information meets the expected water quality standard, and the recovered water quantity information meets the expected water quantity standard, an extraction instruction is generated, and the tail water recovery pool is extracted based on the extraction instruction to obtain recycled water, and the recycled water is transported to the water distribution well for storage.

[0010] In a possible implementation, the following processing is performed: if the recycled water quality information meets the expected water quality standard, but the recycled water volume information does not meet the expected water volume standard, a first backtracking instruction is generated; the water volume is backtracked on all nodes through the first backtracking instruction to generate a water volume backtracking result; based on the water volume backtracking result, the loss of the recycled water volume information is calculated, and when the water volume loss is less than a preset loss threshold, the expected water volume standard is updated to generate an expected water volume update standard; the recycled water volume information is compared with the expected water volume update standard, and when the recycled water volume information meets the expected water volume standard, the extraction instruction is generated.

[0011] In a possible implementation, the following processing is performed: if the recycled water quality information does not meet the expected water quality standard, but the recycled water quantity information meets the expected water quantity standard, a second backtracking instruction is generated; the analysis unit is activated through the second backtracking instruction, and the water quality analysis of the supernatant of the tail water recovery pool is performed based on the analysis unit to generate a water quality analysis result; according to the water quality analysis result, the drainage pool, the concentration pool, and the biological activated carbon filter pool are traversed for matching to determine the target pool; the supernatant of the tail water recovery pool is traced back to the target pool for iterative processing until the recycled water quality information meets the expected water quality standard, and the extraction instruction is generated.

[0012] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0013] The present application provides a method for controlling the reuse of the supernatant liquid from a thickening tank based on the flotation transformation technology of a drainage tank, which solves the technical problem that the supernatant liquid and sludge dewatering liquid of a traditional thickening tank are discharged externally, causing safety and health impacts on the sludge dewatering liquid and cannot be directly reused. It solves the problem that the supernatant liquid and sludge dewatering liquid of an effective thickening tank are difficult to reuse and have no suitable discharge route, ensures the safe and stable reuse of sludge water discharged from a water supply plant, and achieves the technical effect of achieving the "zero emission" operation and management goal of a water supply plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the accompanying drawings of the embodiment of the present invention will be briefly introduced below. A flow chart is used in the present application to illustrate the operations performed by the method according to the embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or one or more operations can be removed from these processes.

[0015] Figure 1 A schematic flow chart of a method for controlling the reuse of supernatant from a concentration tank based on the flotation transformation technology of a drainage tank provided in an embodiment of the present application;

[0016] Figure 2 A schematic flow chart of supernatant treatment for a method for controlling supernatant reuse in a concentration tank based on a drainage tank flotation transformation technology provided in an embodiment of the present application. DETAILED DESCRIPTION

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0018] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0019] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict, and the terms "first\second" involved are merely to distinguish similar objects and do not represent a specific ordering of objects. The terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of this application. The terms used herein are for the purpose of describing the embodiments of the present application only.

[0020] The present application embodiment provides a method for controlling the reuse of the supernatant in the concentration tank based on the flotation transformation technology of the drainage tank, such as Figure 1 As shown, the method includes:

[0021] Execute step A100, receive multi-source water bodies through drainage ponds in the target area to obtain a multi-source water body data set; first determine the target area where multi-source water bodies need to be received, the target area may be an industrial or urban area with multiple water sources, the water sources may include rainwater, surface runoff, industrial wastewater, domestic sewage, etc., and deploy drainage ponds in the target area as centralized receiving and processing facilities for multi-source water bodies. The drainage pond should have sufficient capacity and processing capacity to cope with the simultaneous inflow of water bodies from different sources, and set up independent receiving channels or pipeline systems for each water source.

[0022] Furthermore, various types of sensors are deployed at different locations in the drainage pool to collect water quality parameters of different water bodies. The deployed sensors collect real-time water quality data of each water source after it flows into the drainage pool. The collected data is transmitted to a centralized data processing system via a wired or wireless network to form a real-time multi-source water body data set.

[0023] Execute step A200, use the flotation transformation technology to preliminarily process the multi-source water body data set, and generate multiple water body treatment data; by setting an air flotation device in the drainage pool, according to the size and processing capacity of the configured air flotation device, adapt to the flow and water quality changes of the multi-source water bodies from different sources, and install a micro-bubble generator, the device can generate a large number of tiny bubbles by pressurizing or other means of air, these bubbles contact with suspended matter in the water body to form scum, and then according to the flow and water quality characteristics of the multi-source water body data set, the water bodies from different sources are introduced into the drainage pool through pipes or channels. The flotation technology is an efficient water treatment technology. By introducing tiny bubbles into the water, the suspended solids, organic matter, algae and other tiny particles in the water are attached to the bubbles and rise to the water surface with the bubbles to form scum. After the scum is scraped off, the remaining water body can be further treated to significantly reduce the concentration of pollutants in the water body. The remaining water body enters the tail water recovery pool to prepare for subsequent reuse, and the amount, composition and removal efficiency of the scum are recorded, thereby generating multiple water body treatment data.

[0024] Execute step A300, extract the supernatant of the concentration tank based on the multiple water body treatment data, perform ultrafiltration membrane treatment on the supernatant of the concentration tank, and generate ultrafiltration membrane treatment results; filter out data related to the supernatant of the concentration tank from multiple water body treatment data sets in the flotation treatment process. These data usually include key water quality parameters such as the flow rate, turbidity, COD, suspended solids content, pH value, etc. of the supernatant, and then the qualified supernatant of the concentration tank can be guided from the flotation treatment unit to the ultrafiltration membrane treatment unit by using a special pipeline or transportation system, and select a suitable ultrafiltration membrane material for the supernatant of the concentration tank, and a micro-nano ceramic membrane can be used. The micro-nano ceramic membrane has a small pore size (less than 0.1 micron), which can effectively intercept suspended solids, bacteria, viruses and other microorganisms while maintaining a high water flux.

[0025] Further, according to the flow rate and water quality parameters of the supernatant, the water flow rate and pressure are adjusted to adapt to the working conditions of the ultrafiltration membrane to ensure the best membrane filtration effect. The supernatant passes through the ultrafiltration membrane under a certain pressure, and the suspended solids, bacteria, viruses, particles, etc. in the water body are retained upstream of the membrane, while the clean water passes through the membrane pores into the downstream treatment unit. During the ultrafiltration membrane treatment process, the water quality data of the treated supernatant is collected through online monitoring equipment. The monitoring parameters include turbidity, COD, suspended solid content, total bacteria, conductivity, pH value, etc., and the real-time collected water quality data is recorded in the database, and stored in association with the supernatant data before treatment to obtain the ultrafiltration membrane treatment results.

[0026] Execute step A400, and place the third supernatant in the tail water recovery tank based on the ultrafiltration membrane treatment result; in a possible implementation, the third supernatant is placed before the tail water recovery tank based on the ultrafiltration membrane treatment result, such as Figure 2As shown, step A400 further includes step A410, using a flocculant to perform sludge dehydration on the supernatant of the concentration tank after ultrafiltration membrane treatment to obtain a mud-water separation result; executing step A420, constructing a dehydration liquid regulating tank, and processing the dehydration liquid regulating tank in combination with the mud-water separation result to generate a dehydration adjustment result; executing step A430, analyzing the dehydration adjustment result to determine the dehydration liquid and the bottom mud; executing step A440, purifying the dehydration liquid by an ultrafiltration membrane treatment process to generate a first supernatant and backwashing water; executing step A450, The sludge is transferred to the sludge balance tank for adjustment, and the sludge is dehydrated according to the sludge adjustment results to generate the second supernatant, backwash water, and mud cake; first, a flocculant (such as anionic polyacrylamide) is added to the supernatant of the concentration tank after ultrafiltration membrane treatment to promote the coagulation of suspended solids and other particles, so as to carry out efficient mud and water separation. Through flocculation, the suspended solids condense into larger particles to form flocs, which settle to the bottom of the tank under the action of gravity, thereby achieving mud and water separation and obtaining mud and water separation results. Then, a dewatering liquid regulating tank is constructed to collect and process the dewatering liquid after mud and water separation. The regulating tank should have sufficient capacity and adjustment capacity to adapt to the fluctuations in the flow rate and water quality of the dewatering liquid, and play a role in collecting, regulating and ensuring the stable operation of subsequent processes in view of the discontinuous and unstable characteristics of the dewatering liquid.

[0027] In the dewatering liquid regulating tank, the dewatering liquid is combined with the mud-water separation result, and the solid particles are further settled through the static and slow flow of the regulating tank to generate a relatively clear regulating result, which includes two parts: the relatively clear dewatering liquid in the upper layer and the sediment in the lower layer. Further, in the dewatering liquid regulating tank, the dewatering regulating result is parsed into the dewatering liquid in the upper layer and the sediment in the lower layer. The dewatering liquid and the sediment can be effectively separated by static or decantation, ensuring that the two can enter their respective treatment processes respectively, and then the parsed dewatering liquid is introduced into the ultrafiltration membrane treatment system, and the dewatering liquid is further purified by the ultrafiltration membrane. After the ultrafiltration membrane treatment, the dewatering liquid is separated into a clear first supernatant and backwash water. The first supernatant can be used for further reuse, and the backwash water is returned to the drainage tank or reprocessed. At the same time, the parsed sediment is transmitted to the sludge balance tank for further regulation. The sludge balancing tank is used to homogenize the moisture content and viscosity of the sludge to ensure the stability and efficiency of the subsequent sludge dewatering process. In the sludge balancing tank, according to the water quality monitoring results, the sludge conditions are appropriately adjusted (such as adding regulators or adjusting the tank environment) to optimize the dewatering effect.

[0028] Finally, the conditioned sludge is introduced into the sludge dewatering equipment (such as belt filter press, centrifuge, etc.) for mechanical dehydration to generate a mud cake with a high solid content. During the sludge dewatering process, the second supernatant and backwash water are separated. This process ensures the efficient reuse of the supernatant, the stable dehydration treatment of the sludge, and the recycling of water resources within the system, achieving the dual goals of improving water quality and protecting the environment.

[0029] Execute step A460, input the backwash water into the drainage pool, transport the mud cake, and input the first supernatant and the second supernatant into the biological activated carbon filter for treatment, and generate the third supernatant according to the treatment result. In a possible implementation, step A460 further includes step A461, inputting the backwash water into the drainage pool includes transporting the backwash water treated by the ultrafiltration membrane to the drainage pool and storing the rest of the backwash wastewater in the drainage pool for adjustment and flotation treatment.

[0030] The second supernatant can be reused after treatment, and the backwash water is returned to the system for reprocessing, and finally the first supernatant, the second supernatant, the backwash water and the mud cake are generated. The backwash water generated during the ultrafiltration membrane treatment process is re-input into the drainage tank. The drainage tank performs preliminary treatment on the suspended matter and pollutants in the backwash water through flotation treatment to ensure that the water quality is recycled in the system. During the ultrafiltration membrane treatment process, backwash water is generated periodically. These backwash waters contain suspended solids, microorganisms and other impurities intercepted from the supernatant, and these backwash waters are transported to the drainage tank through a specially designed pipeline system. During the transportation process, ensure that the flow is stable, and monitor the water quality parameters of the backwash water (such as suspended solids concentration, COD, etc.) in real time for subsequent treatment.

[0031] Furthermore, in addition to the backwash water produced by the ultrafiltration membrane treatment, other treatment units in the system (such as biological activated carbon filter, sand filter, etc.) will also produce backwash wastewater. These backwash wastewaters usually contain particles, suspended matter, organic matter and some soluble pollutants. These backwash wastewaters are temporarily stored in a designated area of ​​the drainage tank so that they can be centrally managed before being conditioned and treated.

[0032] In one possible implementation, step A460 further includes step A462, performing activated carbon adsorption on the first supernatant and the second supernatant through the biological activated carbon filter to generate a first treatment result; executing step A463, performing biodegradation on the first supernatant and the second supernatant based on the first treatment result to generate a second treatment result; executing step A464, performing biocatalytic oxidation on the first supernatant and the second supernatant based on the second treatment result to generate a third treatment result; executing step A465, integrating the first treatment result, the second treatment result, and the third treatment result to generate the third supernatant.

[0033] First, the first supernatant and the second supernatant treated by the ultrafiltration membrane are introduced into the biological activated carbon filter. The biological activated carbon filter is filled with granular or columnar activated carbon, which has a highly developed pore structure and can effectively adsorb organic pollutants, metal ions and other trace pollutants in the water. When the first supernatant and the second supernatant flow through the activated carbon filter, the organic matter and other pollutants in the water are adsorbed by the surface and pore structure of the activated carbon. These pollutants are combined with the activated carbon by physical adsorption and chemical adsorption, and remain in the filter material, thereby purifying the water quality. After the activated carbon adsorption treatment, most of the soluble organic matter and metal ions in the supernatant are removed, generating the first treatment result.

[0034] Secondly, in the activated carbon filter, the surface of the activated carbon particles is usually covered with a layer of biofilm, which is composed of bacteria, fungi and other microorganisms, and can further degrade organic pollutants adsorbed on the surface of the activated carbon or in the water. According to the first treatment result, the biofilm layer in the biological activated carbon filter continues to flow. These microorganisms degrade the remaining organic pollutants into harmless carbon dioxide, water and other inorganic substances through metabolic activities. After biodegradation, most of the organic pollutants in the first supernatant and the second supernatant are completely decomposed to generate a purer second treatment result.

[0035] Then, in the biological activated carbon filter, specific catalysts or catalytically active substances can work synergistically with the biofilm to promote the oxidative decomposition of difficult-to-degrade organic pollutants. Oxidants (such as hydrogen peroxide, ozone, etc.) are added to the filter to generate highly active oxygen free radicals or other oxidizing substances through the action of the catalyst, thereby enhancing the degradation capacity of organic pollutants. After biocatalytic oxidation treatment, the residual pollutants in the first supernatant and the second supernatant are further oxidized and removed, generating a third treatment result with a higher degree of purification.

[0036] Finally, the water quality data of the first, second and third treatment results are integrated and analyzed to comprehensively evaluate the water quality changes in the entire treatment process, determine the final water quality improvement, and determine the final third supernatant based on the results of the integrated analysis. The third supernatant should meet the set water quality standards and meet the requirements for reuse or discharge, thus achieving deep purification and recycling of water quality.

[0037] Placing the third supernatant in the tailwater recovery pool based on the results of ultrafiltration membrane treatment means that the third supernatant is obtained after multiple processes such as ultrafiltration membrane treatment, activated carbon adsorption, biodegradation and biocatalytic oxidation. The water quality has been significantly improved and meets the standards for reuse or further treatment. Then confirm that the capacity of the tailwater recovery pool can accommodate the third supernatant and there is enough space for water quality adjustment and balance. Then ensure that the online water quality monitoring equipment in the tailwater recovery pool is operating normally, and can monitor various indicators of the water body in the recovery pool in real time, so as to detect abnormal conditions in time and make adjustments. Through the preset pipeline system, the third supernatant is transported from the biological activated carbon filter to the tailwater recovery pool. The pipeline system should have a leak-proof design and be equipped with valve control to adjust the flow according to demand, evenly place the third supernatant in the tailwater recovery pool, and mix it with other treated water bodies, providing strong support for the continuous operation of the water supply plant and the recycling of water resources.

[0038] Next, step A500 is executed to perform balanced adjustment based on the tail water recovery pool, and intelligently control the reuse of the supernatant based on the adjustment result. In a possible implementation, step A500 further includes step A510, uniformly collecting the effluent from the drainage pool, the effluent from the supernatant ultrafiltration membrane of the concentration pool, and the effluent from the biological activated carbon filter to generate an effluent data set, wherein the effluent data set includes water quality information and water quantity information; executing step A520, averaging the third supernatant through the tail water recovery pool in combination with the water quality information to generate first adjustment information; executing step A530, adjusting the third supernatant through the tail water recovery pool in combination with the water quantity information to generate second adjustment information; executing step A540, adding the first adjustment information and the second adjustment information to the adjustment result.

[0039] The drainage pool effluent, the ultrafiltration membrane effluent of the supernatant of the concentration pool, and the biological activated carbon filter effluent are uniformly collected. The drainage pool effluent refers to the treated water from the drainage pool. These water bodies have been treated with preliminary flotation to remove most of the suspended solids and some organic pollutants. The ultrafiltration membrane effluent of the supernatant of the concentration pool refers to the effluent of the supernatant of the concentration pool after ultrafiltration membrane treatment. The water quality has been significantly improved and contains less suspended solids and microorganisms. The biological activated carbon filter effluent refers to the effluent after activated carbon adsorption and biodegradation treatment. The water quality is further purified and most of the organic pollutants and soluble metal ions are removed. The water quality of each outlet is monitored in real time using online monitoring equipment, and the water volume information of each outlet is collected at the same time. The flow meter is used to record the instantaneous flow and cumulative flow data to ensure the accurate grasp of the water volume of each outlet. Then, the water quality and water volume information collected from each outlet are integrated to generate a unified water data set. This data set contains detailed information on the effluent from different sources, providing a basis for subsequent water quality adjustment and equalization operations.

[0040] Furthermore, the effluents from different sources are mixed through a tailwater recovery pool to make the overall water quality tend to be uniform, reducing the impact of water quality fluctuations on subsequent treatment processes. The water quality information in the effluent data set is used to analyze the water quality characteristics of effluents from different sources, and the optimal averaging ratio is calculated to ensure that the final third supernatant reaches the expected water quality standards. In the tailwater recovery pool, a stirring device or a natural slow flow method is used to average the effluent from the drainage pool, the supernatant ultrafiltration membrane effluent from the concentration pool, and the effluent from the biological activated carbon filter according to the calculated ratio to generate a homogenized water body. After the average is completed, the water quality parameters after average are recorded to generate the first adjustment information as the basis for subsequent water quality adjustment.

[0041] Furthermore, the inflow of water bodies from various sources is adjusted to ensure that the water output of the water body in the tailwater recovery pool meets the design requirements of the system and avoid excessive or insufficient fluctuations in the water supply system. The water volume information in the outlet data set is used to analyze the flow of each outlet to determine the water volume parameters that need to be adjusted to ensure that water bodies from various sources are supplied on demand. By adjusting the flow control device of the valve or pump, the inflow of each water source is accurately adjusted to ensure that the water volume in the tailwater recovery pool is stable. After the water volume adjustment is completed, the adjusted water volume parameters are recorded and the second adjustment information is generated to ensure the stability of the overall system operation.

[0042] Finally, the first adjustment information (water quality and result) and the second adjustment information (water quantity adjustment result) are integrated, and the relationship between the two is analyzed to ensure that the adjustment of water quality and water quantity is coordinated and does not interfere with each other. The final adjustment result is generated through comprehensive analysis of the integrated adjustment information. This result will be used to guide the operation of the tailwater recovery pool and the optimization of subsequent water treatment processes. The generated adjustment result will be fed back to the control system of the tailwater recovery pool to achieve automated water quality and water quantity control and ensure the quality and stability of the effluent from the tailwater recovery pool.

[0043] In one possible implementation, step A500 further includes step A550, extracting the recovered water quality information and recovered water quantity information of the tail water recovery pool based on the adjustment result; executing step A560, judging whether the recovered water quality information meets the expected water quality standard based on the first adjustment information, and judging whether the recovered water quantity information meets the expected water quantity standard based on the second adjustment information; executing step A570, if the recovered water quality information meets the expected water quality standard, and the recovered water quantity information meets the expected water quantity standard, then generating an extraction instruction, extracting the tail water recovery pool based on the extraction instruction, obtaining recycled water, and transporting the recycled water to the water distribution well for storage.

[0044] Based on the adjustment results, the recovered water quality information and recovered water quantity information of the tailwater recovery pool are extracted. The process can be to install online water quality monitoring equipment in the tailwater recovery pool, including turbidity sensors, COD sensors, pH sensors, dissolved oxygen sensors, etc., to monitor the water quality of the recovered water in real time. These devices are used to collect various water quality parameters of the recovered water in the tailwater recovery pool in real time to form a recovered water quality information data set. At the same time, flow meters are installed at the inlet and outlet of the tailwater recovery pool to monitor the flow of the recovered water in real time. Through these devices, the changes in the amount of recovered water in the tailwater recovery pool are accurately recorded, and the monitored flow data are organized into a recovered water quantity information data set. This data set should include information such as the total recovered water volume, instantaneous flow, and inlet and outlet flow balance of the tailwater recovery pool.

[0045] Further, the extracted recycled water quality information is compared and analyzed with the expected water quality standard in the first adjustment information. Analyze whether each water quality index meets the predetermined quality standard, such as turbidity, COD, BOD, dissolved oxygen, etc., and then compare the extracted recycled water volume information with the expected water volume standard in the second adjustment information to check whether it meets the set water volume range and flow requirements. Only when both the recycled water quality information and the recycled water volume information meet the expected standards, ensure that both water quality and water volume meet the standards. Once the conditions are met, generate an extraction instruction to instruct the tail water recovery pool to extract the recycled water. According to the extraction instruction, start the pumping pump of the tail water recovery pool to extract the recycled water that meets the standards from the tail water recovery pool. The extraction process should be smooth and efficient to avoid disturbing the water quality in the recovery pool. During the extraction process, continue to monitor the water quality and water volume information to ensure that the extracted recycled water always meets the expected standards. If any abnormality is found during the extraction process, the system will immediately stop the extraction operation, issue an alarm, and transport the extracted recycled water to the water distribution well.

[0046] In one possible implementation, step A570 further includes step A571, if the recycled water quality information meets the expected water quality standard, but the recycled water volume information does not meet the expected water volume standard, then generating a first backtracking instruction; executing step A572, tracing back the water volume of all nodes through the first backtracking instruction, and generating a water volume backtracking result; executing step A573, calculating the loss of the recycled water volume information based on the water volume backtracking result, and when the water volume loss is less than a preset loss threshold, updating the expected water volume standard, and generating an expected water volume update standard; executing step A574, comparing the recycled water volume information with the expected water volume update standard, and generating the extraction instruction when the recycled water volume information meets the expected water volume standard.

[0047] First, determine whether the recycled water quality information meets the expected water quality standards. If the water quality meets the standards, but the recycled water volume information does not meet the expected water volume standards, the backtracking process is entered, and the first backtracking instruction is generated in the above case. This instruction is used to start the water volume backtracking process of the entire node, find and analyze the causes of water volume deviation, and according to the first backtracking instruction, the system backtracks the water volume data of each node in the entire water treatment process (including drainage tanks, concentration tanks, ultrafiltration membrane treatment units, biological activated carbon filter tanks, etc.). This process includes checking the inlet and outlet water volume of each pool, the operation of the flow regulating equipment, and the precision and accuracy of the data acquisition system. Through backtracking analysis, the system generates water volume backtracking results. The result records the water volume balance status of each node in detail, and points out possible water volume losses or sources of errors.

[0048] Furthermore, the overall water loss can be calculated based on the water volume backtracking results, which can include the difference between the actual measured recovered water volume and the theoretically calculated expected water volume. The calculation formula usually takes into account factors such as flow meter accuracy, equipment failure rate, and pipeline leakage.

[0049] If the water loss is less than the preset loss threshold (i.e. the acceptable water error range set by the system), the water deviation is considered to be within the controllable range. When the water loss is less than the preset loss threshold, the system updates the expected water standard and generates a new expected water update standard. This standard takes into account the water loss in actual operation to better reflect the actual situation. The generated expected water update standard is applied to the current water judgment process to ensure that the system can monitor and control the water volume more accurately, and finally compare the recovered water volume information with the new expected water volume update standard. If the comparison result shows that the recovered water volume information meets the new standard, the water volume is considered to meet the standard. When the water quality and the updated water volume standard meet expectations, the system generates an extraction instruction to start the reused water extraction operation of the tail water recovery pool to ensure the efficient use of water resources and the stable operation of the system.

[0050] In one possible implementation, step A570 further includes step A575, if the recycled water quality information does not meet the expected water quality standard, but the recycled water quantity information meets the expected water quantity standard, then generating a second backtracking instruction; executing step A576, activating the analysis unit through the second backtracking instruction, performing water quality analysis on the supernatant of the tail water recovery pool based on the analysis unit, and generating a water quality analysis result; executing step A577, traversing the drainage pool, the concentration pool, and the biological activated carbon filter pool for matching according to the water quality analysis result, and determining the target pool; executing step A578, tracing the supernatant of the tail water recovery pool back to the target pool for iterative processing until the recycled water quality information meets the expected water quality standard, and generating the extraction instruction.

[0051] First, determine whether the recycled water quality information conforms to the expected water quality standards. If the recycled water quality information does not meet the standards, but the recycled water volume information meets expectations, the system enters the water quality backtracking process and generates a second backtracking instruction under the above conditions. This instruction is used to start the analysis unit for in-depth water quality analysis and determine the target pool that needs to be iteratively processed. The analysis unit is activated by the second backtracking instruction. The analysis unit contains advanced data analysis tools and algorithms for detailed analysis of the water quality of the supernatant in the tail water recovery pool. The analysis unit first extracts a supernatant sample from the tail water recovery pool, monitors in real time, and collects detailed water quality data. These data include, but are not limited to, key indicators such as turbidity, COD, BOD, pH, dissolved oxygen, and total dissolved solids (TDS).

[0052] Further analysis units conduct in-depth analysis of the collected water quality data to determine the specific types of pollutants and concentration levels, identify possible causes of substandard water quality, and based on the results of the analysis, the system generates a water quality analysis report that records in detail the deviations between the actual values ​​of various water quality indicators and the expected standards. These data will provide a basis for subsequent target pool matching and iterative processing. Based on the results of the water quality analysis, the system traverses the drainage pool, concentration pool, and biological activated carbon filter to find the most matching treatment unit to determine the target pool. Based on the determined target pool, the supernatant in the tail water recovery pool is traced back to the target pool. This means that the supernatant is reintroduced into the target pool for reprocessing to resolve previously detected water quality problems. The supernatant is further processed in the target pool, such as biodegradation, oxidation treatment, adsorption, etc., until the water quality meets the expected standards. Iterative processing refers to cycling this process multiple times until the water quality meets the expected requirements. After each iterative processing, the system activates the analysis unit again to analyze the water quality of the treated supernatant and generate new water quality analysis results. If the new water quality analysis results show that the supernatant water quality has met the expected standards, the iterative processing is stopped and the next step is entered. If the water quality still does not meet the standards, the iteration is continued until it meets the standards. After the iterative processing, when the recycled water quality information meets the expected water quality standards and the recycled water volume information still meets the expected water volume standards, the system generates an extraction instruction to ensure efficient use of water resources and stable operation of the system.

[0053] The embodiments of the present application solve the technical problem that the supernatant liquid and sludge dewatered liquid of the traditional thickening tank are discharged externally, which causes safety and health impacts on the sludge dewatered liquid and cannot be directly reused. The embodiments of the present application solve the problem that the supernatant liquid and sludge dewatered liquid of the effective thickening tank are difficult to reuse and have no suitable discharge route, ensure the safe and stable reuse of the sludge water discharged from the water supply plant, and achieve the technical effect of the "zero emission" operation and management goal of the water supply plant.

[0054] The above specific implementation manner does not constitute a limitation to the protection scope of the present application. It should be understood by those skilled in the art that various modifications, combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application. In some cases, the actions or steps recorded in the present application can be performed in an order different from that in the embodiment and can still achieve the desired results. In addition, the process depicted in the accompanying drawings does not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Claims

1. A method for controlling the reuse of supernatant from a concentration tank based on the flotation transformation technology of a drainage tank, characterized in that: The method comprises: Multi-source water body data sets are obtained by receiving multi-source water bodies through drainage ponds in target areas; Preliminarily processing the multi-source water body data set by using air flotation transformation technology to generate a plurality of water body processing data; Extracting the supernatant of the concentration tank based on the plurality of water body treatment data, performing ultrafiltration membrane treatment on the supernatant of the concentration tank, and generating an ultrafiltration membrane treatment result; placing the third supernatant in a tail water recovery tank based on the ultrafiltration membrane treatment result; Balance adjustment is performed based on the tail water recovery pool, and intelligent reuse control of the supernatant is performed based on the adjustment result.

2. The method for controlling the reuse of supernatant from a concentration tank based on the air flotation transformation technology of a drainage tank according to claim 1, characterized in that: Based on the ultrafiltration membrane treatment result, the third supernatant is placed before the tail water recovery tank, and the method includes: The supernatant of the concentration tank after ultrafiltration membrane treatment is dehydrated by using flocculants to obtain the mud-water separation result; Constructing a dewatering liquid regulating pool, and processing the dewatering liquid regulating pool in combination with the mud-water separation result to generate a dewatering regulation result; Analyzing the dehydration adjustment result to determine the dehydrated liquid and the bottom mud; Purifying the dehydrated liquid by using an ultrafiltration membrane treatment process to generate a first supernatant and backwash water; The sludge is transferred to a sludge balancing tank for adjustment, and the sludge is dehydrated according to the sludge adjustment result to generate a second supernatant, backwash water, and a mud cake; The backwash water is input into a drainage tank, the mud cake is transported out, and the first supernatant and the second supernatant are input into a biological activated carbon filter for treatment, and the third supernatant is generated according to the treatment results.

3. The method for controlling the reuse of supernatant from a concentration tank based on the air flotation transformation technology of a drainage tank according to claim 2, characterized in that: Inputting the backwash water into the drainage tank includes conveying the backwash water treated by ultrafiltration membrane to the drainage tank and storing the remaining backwash wastewater in the drainage tank for adjustment and flotation treatment.

4. The method for controlling the reuse of the supernatant in the concentration tank based on the air flotation transformation technology of the drainage tank according to claim 2, characterized in that: The first supernatant and the second supernatant are input into a biological activated carbon filter for treatment, and a third supernatant is generated according to the treatment result, the method comprising: Performing activated carbon adsorption on the first supernatant and the second supernatant through the biological activated carbon filter to generate a first treatment result; Based on the first treatment result, biodegrading the first supernatant and the second supernatant to generate a second treatment result; Based on the second treatment result, the first supernatant and the second supernatant are subjected to biocatalytic oxidation to generate a third treatment result; The first processing result, the second processing result, and the third processing result are integrated to generate the third supernatant.

5. The method for controlling the reuse of supernatant from a concentration tank based on the air flotation transformation technology of a drainage tank according to claim 1, characterized in that: Based on the tail water recovery pool, the balanced adjustment is performed, and the method includes: Collect the effluent from the drainage pool, the effluent from the ultrafiltration membrane of the concentration pool, and the effluent from the biological activated carbon filter pool to generate an effluent data set, which includes water quality information and water quantity information; The third supernatant is homogenized by the tail water recovery tank in combination with the water quality information to generate first adjustment information; The third supernatant is regulated by the tail water recovery tank in combination with the water volume information to generate second regulation information; The first adjustment information and the second adjustment information are added to the adjustment result.

6. The method for controlling the reuse of the supernatant in the concentration tank based on the air flotation transformation technology of the drainage tank according to claim 5, characterized in that: Based on the adjustment results, the supernatant is intelligently reused and controlled, and the method includes: Extracting the recovered water quality information and the recovered water quantity information of the tail water recovery pool based on the adjustment result; Based on the first adjustment information, determine whether the recycled water quality information meets the expected water quality standard, and based on the second adjustment information, determine whether the recycled water quantity information meets the expected water quantity standard; If the recycled water quality information meets the expected water quality standard, and the recycled water quantity information meets the expected water quantity standard, an extraction instruction is generated, and the tail water recovery pool is extracted based on the extraction instruction to obtain recycled water, and the recycled water is transported to the water distribution well for storage.

7. The method for controlling the reuse of the supernatant in the concentration tank based on the air flotation transformation technology of the drainage tank according to claim 6, characterized in that: include: If the recycled water quality information meets the expected water quality standard, but the recycled water quantity information does not meet the expected water quantity standard, generating a first backtracking instruction; Perform water volume backtracking on all nodes through the first backtracking instruction to generate a water volume backtracking result; Based on the water volume backtracking result, the recovery water volume information is calculated for loss, and when the water volume loss is less than a preset loss threshold, the expected water volume standard is updated to generate an expected water volume update standard; The recycled water volume information is compared with the expected water volume update standard, and when the recycled water volume information meets the expected water volume standard, the extraction instruction is generated.

8. The method for controlling the reuse of the supernatant in the concentration tank based on the air flotation transformation technology of the drainage tank according to claim 6, characterized in that: include: If the recycled water quality information does not meet the expected water quality standard, but the recycled water quantity information meets the expected water quantity standard, generating a second backtracking instruction; activating the analysis unit through the second backtracking instruction, and performing water quality analysis on the supernatant of the tail water recovery tank based on the analysis unit to generate a water quality analysis result; According to the water quality analysis results, the drainage pool, the concentration pool, and the biological activated carbon filter are traversed for matching to determine the target pool; The supernatant of the tail water recovery pool is traced back to the target pool for iterative processing until the recovered water quality information meets the expected water quality standard, and the extraction instruction is generated.

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