Sludge activity monitoring device and method

Abstract

The present application relates to sewage treatment technical field, disclose sludge activity monitoring device and method.The sludge activity monitoring device provided by the present application can realize sampling, transmission and monitoring of the sample in the reaction tank by placing the sampling structure, transmission structure and monitoring structure directly in the reaction tank, reduce the difference caused by temperature change in the sampling and transmission process, and ensure that the sample collected in the water storage collecting bin is rapidly and continuously conveyed to the front end monitoring member and the end monitoring member under the action of the conveying pump body, so as to provide accurate data in time, realize continuous measurement, help to capture the change rule of sample activity, make the measurement result more reliable, accumulate a large amount of data, provide sufficient samples for subsequent intelligent regulation and data filtering, help operation and maintenance personnel to make adjustment quickly, and realize the automatic monitoring process of sampling, transmission, monitoring and data transmission by setting the control terminal.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a sludge activity monitoring device and method. Background Technology

[0002] In the current field of wastewater treatment technology, the activated sludge process is one of the most widely used technologies and has become the main treatment technology for domestic sewage, urban sewage and organic industrial wastewater.

[0003] Sludge activity is generally characterized by the rate of pollutant degradation. Traditional measurement methods involve collecting sludge samples for pollutant degradation experiments. For example, activated sludge samples are collected from wastewater treatment sites, transported to a laboratory, and then their oxygen and acidity consumption rates are measured.

[0004] However, in actual measurement, it was found that sludge activity is affected by environmental factors such as temperature and sludge concentration such as sedimentation and biodegradation during collection and transportation. Furthermore, the process of removing sludge takes a certain amount of time, and obtaining sufficient sample data requires repeated complete sampling, transportation, injection, and monitoring processes. This results in low frequency of sludge measurement and long measurement cycles, making it difficult to depict the continuous changes in microbial metabolism under real conditions. Consequently, the measurement results are unreliable, causing the test results to deviate from the actual working conditions and affecting subsequent control measures such as chemical dosing and flow rate control. Summary of the Invention

[0005] In view of this, the present invention provides a sludge activity monitoring device and method to solve the problem of unreliable results obtained after sludge collection and transportation.

[0006] In a first aspect, the present invention provides a sludge activity monitoring device, comprising a sampling structure, a transmission structure, and a monitoring structure placed within a reaction tank. The sampling structure includes a water sample collection chamber with an inlet and an outlet, the inlet of which is connected to the reaction tank. The transmission structure includes a transmission pipe and a pump, the inlet of which is connected to the outlet of the water sample collection chamber, and the pump installed on the transmission pipe to move the sample inside the transmission pipe toward the outlet. The monitoring structure includes a front-end monitoring element and a terminal monitoring element, both installed on the transmission pipe along the sample movement direction, with the terminal monitoring element located downstream of the front-end monitoring element. A control terminal is communicatively connected to the pump, the electrical connection terminals of the front-end monitoring element, and the terminal monitoring element.

[0007] Beneficial effects: By placing the sampling, transmission, and monitoring structures directly within the reaction tank, sample collection, transmission, and monitoring can be achieved within the tank, reducing variations caused by temperature changes during sampling and transmission. Simultaneously, the pump ensures that samples collected in the water tank are rapidly and continuously transported to the front and rear monitoring units via the transmission pipe, providing timely and accurate data. Continuous measurement is also possible, helping to capture patterns in sample activity changes, making measurement results more reliable, and accumulating a large amount of data to provide sufficient samples for subsequent intelligent control and data filtering, assisting maintenance personnel in making rapid adjustments. Furthermore, by setting up a control terminal, the entire process of sampling, transmission, monitoring, and data transfer can be automated.

[0008] In one optional embodiment, the sludge activity monitoring device further includes a degassing structure, the degassing structure including a first guide member installed inside the water sample collection chamber. Along the sample movement direction, the distance between the first guide member and the first side plate of the water sample collection chamber gradually decreases to form an acceleration zone.

[0009] In one optional embodiment, the water sample collection chamber is further provided with a second side plate and a third side plate, the second side plate and the third side plate are spaced apart and form a first air outlet, the third side plate is located downstream of the second side plate in the sample movement direction, the distance between the second side plate and the third side plate gradually decreases and forms a diversion zone; the first guide is used to guide the sample to the second side plate of the water sample collection chamber, the sample is reversed at the second side plate and enters the diversion zone.

[0010] In one optional embodiment, the degassing structure further includes a second guide member installed inside the water sample collection chamber near the water inlet. The second guide member has a first guide surface located on the upstream side of the first guide member. In the sample movement direction, the distance between the first guide surface and the first side plate gradually decreases to guide the sample from the water inlet to the acceleration zone.

[0011] In one optional embodiment, the second guide member is further provided with a second guide surface. In the sample moving direction, the distance between the second guide surface and the first side plate gradually decreases. The second guide surface is disposed on the downstream side of the acceleration zone, and the second guide surface and the second guide member are spaced apart to form a reflux zone communicating with the acceleration zone.

[0012] In one optional embodiment, the degassing structure further includes a cyclone separator installed between the outlet of the water sample collection chamber and the transmission pipe along the sample movement direction.

[0013] In one optional embodiment, the sludge activity monitoring device further includes a dosing structure, which includes a dosing chamber, a dosing pipe, and a dosing pump. The outlet of the dosing chamber is connected to the transmission pipe through the dosing pipe. Along the sample movement direction, the dosing chamber is located upstream of the front-end monitoring element. The dosing pump is installed on the dosing pipe and is communicatively connected to a control terminal.

[0014] In one alternative embodiment, the sludge activity monitoring device further includes an aeration element installed in the acceleration zone.

[0015] In one alternative embodiment, the sludge activity monitoring device further includes an acceleration component installed at the inlet of the water sample collection chamber.

[0016] In one optional embodiment, the monitoring structure further includes a light source generator and a light source receiver, wherein the light source generator emits light towards the transmission tube; and the light source receiver receives the transmitted light after passing through the sample.

[0017] Secondly, the present invention also provides a method for monitoring sludge activity, using the sludge activity monitoring device provided in the first aspect. The monitoring method includes: installing the sludge activity monitoring device in a biological tank; the sludge activity monitoring device taking samples and defoaming them; transporting the defoamed samples into a transmission pipe, and sequentially acquiring front-end real-time signals and end-end real-time signals through a front-end monitoring device and an end-end monitoring device, respectively; and transmitting the front-end real-time signals and end-end real-time signals to a data terminal for processing and conversion into front-end real-time data and end-end real-time data.

[0018] Beneficial effects: By installing the sludge activity monitoring device within the biological treatment tank, the sampling, transfer, and measurement processes all occur within the tank. Through defoaming and continuous monitoring of real-time data at both the front and back ends, the device can better reflect the true trend of sample activity changes, ensuring that the measured activity results closely approximate reality and are more reliable. Simultaneously, continuous measurement allows for the collection of a large amount of data, providing data support for improving existing processes and assisting in developing maintenance plans during subsequent sample evaluation. Furthermore, real-time data collection and analysis at both the front and back ends provide real-time feedback to maintenance personnel, enabling adjustments to key operating parameters such as aeration rate and chemical dosage based on the current operating status, thereby optimizing treatment effectiveness.

[0019] In one optional embodiment, before installing the sludge activity monitoring device in the biological tank, the method further includes the steps of: setting a front-end preset value and an end preset value at the control terminal; after transmitting the front-end real-time signal and the end real-time signal to the data terminal for processing and converting them into front-end data and end data, the method further includes the steps of: determining whether the front-end real-time data meets the usage requirements based on the relationship between the front-end real-time data and the front-end preset value; if the front-end real-time data meets the usage requirements, comparing the relationship between the end real-time data and the end preset value; if the front-end real-time data does not meet the usage requirements, adjusting the measurement environment inside the transmission tube until the front-end real-time data meets the usage requirements; if the end real-time data meets the usage requirements, calculating the sample activity; if the end real-time data does not meet the usage requirements, increasing the power of the transmission pump and increasing the sample movement speed until the end real-time data meets the usage requirements, and then calculating the sample activity.

[0020] In an optional embodiment, before installing the sludge activity monitoring device in the biological tank, the method further includes the step of setting a preset transmittance value Ts at the control terminal; before calculating the sample activity, the method further includes the step of measuring real-time transmittance data T and determining whether the real-time transmittance data T is greater than the preset transmittance value Ts; if the real-time transmittance data T is greater than the preset transmittance value Ts, the sample transmittance is calculated; if the real-time transmittance data T is less than the preset transmittance value Ts, the power of the transmission pump is increased to increase the sample movement speed until the real-time transmittance data T is greater than the preset transmittance value T, and then the sample concentration S is calculated; wherein, the formula for calculating the sample concentration S is: S=k / (T0-T); where: k is the transmittance to sludge concentration ratio coefficient, g / m³ 2 T0, the transmittance of light when the sample in the transfer pipe is clear water, in meters. -1 T represents the transmittance of light when the sample in the transmission pipeline is activated sludge, measured in m. -1 S, sludge concentration, gm -3 . Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the sludge activity monitoring device provided in an embodiment of the present invention;

[0023] Figure 2 This is a partially enlarged schematic diagram of the sludge activity monitoring device provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic flowchart of the sludge activity monitoring method provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the process for measuring DO1 data and calculating OUR in the sludge activity monitoring method provided in this embodiment of the invention;

[0026] Figure 5 This is a schematic diagram of the process for measuring pH1 data and calculating HUR in the sludge activity monitoring method provided in this embodiment of the invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 11. Water sample collection chamber; 111. Inlet; 112. Outlet; 113. First side plate; 114. Second side plate; 115. Third side plate; 116. First air outlet;

[0029] 2. Transmission structure; 21. Transmission pipe body; 22. Conveying pump body;

[0030] 3. Monitoring structure; 31. Front-end monitoring component; 32. End-end monitoring component; 33. Light source generator; 34. Light source receiver;

[0031] 4. Control terminal;

[0032] 5. Degassing structure; 51. First guide component; 52. Second guide component; 521. First guide surface; 522. Second guide surface; 53. Cyclone separator; 531. Second air outlet;

[0033] 6. Dosing structure; 61. Dosing chamber; 62. Dosing pipe; 63. Dosing pump;

[0034] 7. Aeration components;

[0035] 8. Speed-up components;

[0036] a. Acceleration zone; b. Diversion zone; c. Return zone. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0043] According to an embodiment of the present invention, in one aspect, a sludge activity monitoring device is provided, comprising a sampling structure, a transmission structure 2 and a monitoring structure 3 placed in a reaction tank.

[0044] Among them, such as Figure 1 and Figure 2 As shown, the sampling structure includes a water sample collection chamber 11. Specifically:

[0045] The water sample collection chamber 11 is equipped with an inlet 111 and an outlet 112. The inlet 111 of the water sample collection chamber 11 is connected to the reaction tank.

[0046] The transmission structure 2 includes a transmission tube 21 and a delivery pump 22. The inlet end of the transmission tube 21 is connected to the outlet 112 of the water sample collection chamber 11. The delivery pump 22 is installed on the transmission tube 21 to drive the sample inside the transmission tube 21 toward the outlet end of the transmission tube 21.

[0047] The monitoring structure 3 includes a front-end monitoring element 31 and a rear-end monitoring element 32. Both the front-end monitoring element 31 and the rear-end monitoring element 32 are installed on the transmission tube 21. Along the sample movement direction, the rear-end monitoring element 32 is located downstream of the front-end monitoring element 31.

[0048] The control terminal 4 is communicatively connected to the delivery pump body 22, the electrical connection terminal of the front-end monitoring component 31, and the electrical connection terminal of the end monitoring component 32.

[0049] With this setup, by placing the sampling structure, transmission structure 2, and monitoring structure 3 directly inside the reaction chamber, the sampling, transmission, and monitoring of samples can be achieved within the reaction chamber, reducing differences caused by temperature variations during sampling and transmission.

[0050] Meanwhile, under the action of the delivery pump 22, the samples collected in the water tank can be continuously transported to the front-end monitoring device 31 and the end monitoring device 32 through the transmission pipe 21 of the reaction tank, so as to achieve continuous measurement, provide timely and accurate data, help to capture the pattern of sample activity change, make the measurement results more reliable, and accumulate a large amount of data to provide sufficient samples for subsequent intelligent control and data filtering, and help operation and maintenance personnel make adjustments quickly.

[0051] Furthermore, by setting up control terminal 4, the processes of sampling, transmission, monitoring, and data transfer can be automated. At the same time, if the measurement requirements are not met during the monitoring of sample activity, control terminal 4 can adjust the working parameters of the delivery pump 22 in a timely manner, such as the power, thereby controlling the flow rate and achieving intelligent regulation.

[0052] It should be noted that the sample is a sludge mixture solution.

[0053] Preferably, the outlet end of the transmission tube 21 is connected to the original reaction tank.

[0054] It can be noted that, in this application, as Figure 2 As shown, when two front-end monitoring devices 31 are provided, the two front-end monitoring devices 31 are used to measure the real-time data of front-end DO and the real-time data of front-end pH, respectively.

[0055] Similarly, as Figure 2 As shown, there are two end monitoring devices 32, which are used to measure the real-time data of end DO and the real-time data of end pH, respectively.

[0056] The sludge activity within the sample is calculated by the difference between real-time data from the front end and real-time data from the back end.

[0057] It can be explained that the control terminal 4 is used to receive signals from the front-end monitoring device 31 and the end-end monitoring device 32, and to generate real-time data from the front end and the end end. Based on the real-time feedback data, it generates different signals and feeds them back to the electrical components such as the conveying pump body 22, thereby realizing the control of the monitoring equipment. Figure 4 and Figure 5 As shown.

[0058] Furthermore, the control terminal 4 includes a data processing module and a cloud processing module. The data processing module is encapsulated and protected inside the reaction tank to prevent corrosion, erosion, or other damage. The cloud processing module is located outside the reaction tank and is connected to the data processing module.

[0059] Furthermore, the cloud processing module is connected to the wastewater treatment plant's intelligent control system, not only continuously providing monitoring data to the system but also offering online guidance to maintenance personnel and supporting intelligent control operations. It should be noted that the transmission pipe 21 is made of translucent materials such as glass or plexiglass, with a transparent hydrophobic coating on the inner surface to reduce the adhesion of activated sludge inside the pipe.

[0060] In one embodiment, such as Figure 1 and Figure 2 As shown, the sludge activity monitoring device also includes a degassing structure 5, which includes a first guide 51. The first guide 51 is installed inside the water sample collection chamber 11. Along the sample movement direction, the distance between the first guide 51 and the first side plate 113 of the water sample collection chamber 11 gradually decreases to form an acceleration zone a.

[0061] With this configuration, the addition of the degassing structure 5 can initially separate air bubbles from the sample. Specifically, by adding a first guide 51 and gradually reducing the distance between the first guide 51 and the first side plate 113 of the water sample collection chamber 11 along the sample movement direction, an acceleration zone a is formed. This allows the sample to move faster when it enters the acceleration zone a, which helps air bubbles detach from the sample, reduces the air bubble content in the sample, and reduces the interference caused by air bubbles to subsequent monitoring. For example, a large number of air bubbles can affect the operation of the monitoring end of the monitoring device, causing signal distortion and affecting measurement accuracy.

[0062] In one embodiment, such as Figure 1 and Figure 2 As shown, the water sample collection chamber 11 is also provided with a second side plate 114 and a third side plate 115. The second side plate 114 and the third side plate 115 are spaced apart and form a first air outlet 116. In the sample movement direction, the third side plate 115 is located downstream of the second side plate 114. The distance between the second side plate 114 and the third side plate 115 gradually decreases and forms a diversion zone b. The first guide member 51 is used to guide the sample to the second side plate 114 of the water sample collection chamber 11. The sample changes direction at the second side plate 114 and enters the diversion zone b.

[0063] With this configuration, by providing a second side plate 114 to the water sample collection chamber 11, the sample moves quickly to the second side plate 114 after passing through the acceleration zone a, and enters the diversion zone b after completing the reversal. At this time, by setting the third side plate 115 downstream of the second side plate 114 and gradually reducing the distance between the third side plate 115 and the second side plate 114, the sample is accelerated again, which helps to further separate the bubbles and divert them in the diversion zone b, so that the bubbles are discharged through the first air outlet 116.

[0064] In other words, by optimizing the sample flow path, the amount of air bubbles in the split sample is reduced, further reducing the interference of air bubbles on subsequent monitoring and helping to achieve an efficient and accurate sample monitoring process.

[0065] It can be noted that in this application, the relative positions of the first air outlet 116, the water inlet 111, and the water outlet 112 are not specifically limited, and it is sufficient that the first air outlet 116 and the water outlet 112 are located downstream of the water inlet 111.

[0066] Preferably, to facilitate the utilization of the density characteristics of each material, the first air outlet 116, the water outlet 112, and the water inlet 111 are arranged sequentially along the height direction (gravity direction) to achieve bottom feeding and gradual lifting. After the bubbles separate, the gas is discharged through the first air outlet 116, and the remaining sludge and its solution in the sample enter the water outlet 112 and are measured in real time in the transmission tube 21.

[0067] It can be explained that, in order to improve the ability of the sludge activity monitoring device to separate bubbles, a multi-stage acceleration path was constructed.

[0068] Specifically, such as Figure 1 and Figure 2 As shown, the degassing structure 5 also includes a second guide member 52. The second guide member 52 is installed inside the water sample collection chamber 11 near the water inlet 111. The second guide member 52 is provided with a first guide surface 521. The first guide surface 521 is located on the upstream side of the first guide member 51. In the sample movement direction, the distance between the first guide surface 521 and the first side plate 113 gradually decreases, which is used to guide the sample at the water inlet 111 to the acceleration zone a.

[0069] With this configuration, by adding a second guide member 52 and gradually reducing the distance between the first guide surface 521 of the second guide member 52 and the first side plate 113 in the sample movement direction, it is possible to ensure that the sample entering from the inlet 111 is guided into the acceleration zone a, and it helps to initially accelerate the sample at the inlet 111.

[0070] At the same time, the addition of acceleration zone a creates a multi-stage guiding and acceleration mechanism to ensure effective separation of air bubbles inside the sample.

[0071] It can be explained that, in order to avoid excessive sample accumulation at the outlet 112, which could cause blockage and lead to inaccurate measurement results, samples that do not enter the outlet 112 in time are diverted to the inlet 111.

[0072] For example, such as Figure 2 As shown, the second guide member 52 is also provided with a second guide surface 522. In the sample moving direction, the distance between the second guide surface 522 and the first side plate 113 gradually decreases. The second guide surface 522 is located on the downstream side of the acceleration zone a, and the second guide surface 522 is spaced apart from the second guide member 52 to form a reflux zone c that is connected to the acceleration zone a.

[0073] With this configuration, by adding a second guide surface 522 to the second guide member 52 and placing the second guide surface 522 on the downstream side of the acceleration zone a, and gradually reducing the distance between the second guide surface 522 and the first side plate 113 along the sample movement direction, a reflux zone c is formed, which helps the sample that has not entered the outlet 112 to circulate back to the acceleration zone a for reuse after passing through the reflux zone c.

[0074] Meanwhile, the refluxed sample enters the sample through the inlet 111, which agitates the sample and helps to accelerate the detachment of bubbles from the sample.

[0075] Preferably, the recirculation zone c is located below the outlet 112 along the height direction (gravity direction).

[0076] To further improve the separation effect of bubbles and reduce the interference of bubbles on the measurement results, in one embodiment, such as Figure 1 and Figure 2 As shown, the degassing structure 5 also includes a cyclone separator 53, which is installed between the outlet 112 of the water sample collection chamber 11 and the transmission tube 21 along the sample movement direction.

[0077] With this setup, a hydrocyclone 53 is added between the outlet 112 of the water sample collection chamber 11 and the transmission tube 21. Based on the principle of centrifugal force, the sample moves down along the wall of the hydrocyclone 53, while lighter bubbles gather towards the center and are discharged outwards. This allows the tiny bubbles to be separated again before the sample enters the transmission tube 21, thereby improving the overall degassing efficiency.

[0078] It can be explained that, due to the addition of the hydrocyclone separator 53, the monitoring structure 3 is farther away from the outlet 112. In order to promote sample movement, a transfer pump body 22 is added on the upstream side of the hydrocyclone separator 53 to accelerate the flow of the sample in the water sample collection device into the transfer tube 21.

[0079] The cyclone separator 53 is provided with a second air outlet 531 at the top, which is used to discharge the gas inside the cyclone separator 53 in a timely manner.

[0080] In one embodiment, such as Figure 1 As shown, the sludge activity monitoring device also includes a dosing structure 6, which includes a dosing chamber 61, a dosing pipe 62, and a dosing pump 63. The outlet of the dosing chamber 61 is connected to the transmission pipe 21 through the dosing pipe 62. Along the sample movement direction, the dosing chamber 61 is located upstream of the front-end monitoring element 31. The dosing pump 63 is installed on the dosing pipe 62, and in order to achieve intelligent control, the dosing pump 63 is connected to the control terminal 4.

[0081] With this setup, the outlet of the dosing chamber 61 is connected to the transmission pipe 21 via the dosing pipe 62. The dosing chamber 61 is positioned upstream of the front-end monitoring device 31. The dosing pump 63 is installed at the dosing pipe 62 and communicates with the control terminal 4. This allows for timely adjustment of the physical or chemical properties of the sample's environment, such as pH value, which helps in the subsequent accurate monitoring of the sample's activity.

[0082] The dosing structure 6 is mainly used to supplement the acidity of the sample's environment, that is, to adjust the pH value. HCl is commonly used as the added reagent.

[0083] Specifically, the rate of hydrogen ion consumption is measured using pH to characterize the denitrification process. The hydrogen ion consumption process in denitrification is as follows: 2NO3 - +10e - +12H + →N2+6H2O.

[0084] That is, each nitrate ion produced by denitrification consumes 6 hydrogen ions, and the pH monitoring is highly accurate, less susceptible to interference, and has a lower cost.

[0085] It can be noted that when adjusting the physical properties of the environment in which the sample is located, such as the dissolved oxygen content, it is necessary to add an aeration element 7.

[0086] Preferably, such as Figure 2 As shown, aeration component 7 is installed in acceleration zone a.

[0087] This setup, by adding an aeration element 7 in the acceleration zone a, ensures a sufficient oxygen supply and optimizes the environmental conditions required for microbial metabolism.

[0088] At the same time, it can agitate the sample to prevent suspended solids from settling, and avoid the occurrence of local anaerobic environments when monitoring sample activity in the aerobic zone, thus avoiding affecting the monitoring results.

[0089] Among them, the aeration element 7 is preferably a ceramic microporous aeration head, which can disperse the bubbles as much as possible, increase the dissolution of oxygen, and reduce the generation of larger bubbles that enter the measurement system with the water flow.

[0090] It can be noted that, in order to further improve the bubble separation effect, in one embodiment, such as Figure 2 As shown, the sludge activity monitoring device also includes a speed-up component 8, which is installed at the inlet 111 of the water sample collection chamber 11.

[0091] With this configuration, by adding a speed-boosting component 8 at the inlet 111 of the water sample collection chamber 11, the moving speed of the sample in the water sample collection chamber 11 is increased, thereby increasing the inertia of the sample, making it easier for bubbles to detach from the sample and be discharged from the outlet.

[0092] At the same time, this prevents samples from accumulating at the inlet 111, reducing the risk of blockage.

[0093] Preferably, the speed-up component 8 is selected as a helical propulsion device with a helical solid structure, which helps to remove sludge from the reaction tank.

[0094] In one embodiment, such as Figure 1 As shown, the monitoring structure 3 also includes a light source generator 33 and a light source receiver 34. The light source generator 33 emits light towards the transmission tube 21; the light source receiver 34 receives the transmitted light after passing through the sample.

[0095] With this setup, by adding a light source generator 33 and a light source receiver 34, the transmittance of the sample can be measured in real time, improving the automation of sample monitoring, reducing errors caused by human intervention, ensuring more reliable measurement data, and reducing manual operation and saving labor costs.

[0096] That is, the light source generator 33 emits a light source with a certain intensity, which enters the transmission tube 21 and passes through the sample inside it. The transmitted light intensity is received by the light source receiver 34, and the transmittance of the activated sludge is calculated in real time.

[0097] It can be noted that the control terminal 4 provided above is communicatively connected to the delivery pump body 22 and the dosing pump body 63 to control the power of each pump body.

[0098] The sludge activity monitoring device provided in the above embodiments is placed entirely inside the biological reactor during use. Its biological reaction conditions (temperature, sludge concentration, etc.) are completely consistent with those at the point in the biological reactor being monitored, enabling in-situ measurement and avoiding errors caused by environmental conditions (temperature) and sludge concentration (sedimentation, biodegradation, etc.) during sludge collection and transportation. Furthermore, continuous measurement allows for data accumulation, providing sufficient samples for intelligent control and data filtering.

[0099] In one embodiment, the transmission pipe 21, the delivery pump 22, the front-end monitoring component 31, the end-end monitoring component 32, the light source generator 33, the light source receiver 34, the dosing chamber 61, the dosing pipe 62, and the dosing pump 63 are all protected by an outer shell and placed inside the reaction tank to prevent corrosion and erosion of the components.

[0100] In one embodiment, a cleaning structure is added.

[0101] Specifically, the cleaning structure includes an ultrasonic cleaning component, wherein the transmission tube 21 is designed to be detachable for periodic disassembly, cleaning, and replacement.

[0102] In one embodiment, a filter structure, such as a filter screen, is added. The filter screen is installed at the inlet 111 and the outlet 112 to prevent larger particles of impurities from entering the transmission pipe 21 and causing pipe blockage.

[0103] According to an embodiment of the present invention, another aspect provides a sludge activity monitoring method, which employs the sludge activity monitoring device provided in the preceding aspect.

[0104] Specifically, such as Figure 3 As shown, the sludge activity monitoring method includes: installing a sludge activity monitoring device in a biological tank; taking a sample from the sludge activity monitoring device and defoaming it; transporting the defoamed sample to a transmission pipe 21, and sequentially acquiring front-end real-time signals and end-end real-time signals through a front-end monitoring device 31 and an end-end monitoring device 32, respectively; and transmitting the front-end real-time signals and end-end real-time signals to a data terminal for processing and conversion into front-end real-time data and end-end real-time data.

[0105] This setup, by installing the sludge activity monitoring device inside the biological tank, ensures that the sampling, transmission, and measurement processes all occur within the biological tank. Furthermore, by defoaming and continuously monitoring real-time data at both the front and back ends, it can better reflect the true trend of sample activity changes, ensuring that the measurement results of sample activity are close to the actual situation and making the measurement results more reliable.

[0106] At the same time, continuous measurement can collect a large amount of data, providing data support for improving existing processes and helping to develop maintenance plans when evaluating samples later.

[0107] In addition, based on real-time data collection and analysis at both the front and back ends, real-time feedback can be provided to maintenance personnel, and key operating parameters such as aeration rate and dosage can be adjusted according to the current operating status, thereby optimizing the treatment effect.

[0108] It should be noted that, in order to achieve intelligent control, it is necessary to determine whether the sample inside the transmission tube 21 meets the usage requirements.

[0109] In one embodiment, before installing the sludge activity monitoring device in the biological tank, the method further includes the steps of: setting a front-end preset value and an end preset value at the control terminal 4; after transmitting the front-end real-time signal and the end real-time signal to the data terminal for processing and converting them into front-end data and end data, the method further includes the step of: determining whether the front-end real-time data meets the usage requirements.

[0110] Furthermore, if the front-end real-time data meets the usage requirements, determine whether the end-end real-time data meets the usage requirements; if the front-end real-time data meets the usage requirements, compare the magnitude of the end-end real-time data with the end-end preset value; if the front-end real-time data does not meet the usage requirements, adjust the measurement environment inside the transmission tube 21 until the front-end real-time data meets the usage requirements; if the end-end real-time data meets the usage requirements, calculate the sample activity; if the end-end real-time data does not meet the usage requirements, increase the power of the transmission pump and increase the sample movement speed until the end-end real-time data meets the usage requirements, and then calculate the sample activity.

[0111] With this setup, by pre-setting the front-end and end-end preset values ​​in the control terminal 4 and comparing the actual collected front-end and end-end real-time data with these preset values, precise monitoring and control of the sludge treatment process can be achieved, ensuring that key parameters (such as oxygen consumption and alkali consumption) are always within the ideal range during the treatment process, which helps to maintain the stable operation of the system.

[0112] Meanwhile, by using a dynamic adjustment mechanism, the data is made more reliable. For example, when the real-time data at the front end is detected to be lower than the preset value, the control terminal 4 will adjust the measurement environment inside the transmission tube 21 until the real-time data at the front end reaches the preset standard, which helps to reduce manual intervention.

[0113] For example, when measuring samples in the aerobic zone, the oxygen consumption rate, such as OUR, is measured. The preset value at the front end is DO1s, with a default value of 1 mg / L, and the preset value at the end end is DO2s, with a default value of 0. The front-end monitoring device 31 measures the real-time data DO1 at the front end of the sample, and the end-end monitoring device 32 measures the real-time data DO2 at the end of the sample.

[0114] The measurement formula is:

[0115] In the formula:

[0116] v, the velocity of the sample moving within the delivery tube, in milliseconds (ms). -1 ;

[0117] L is the length of the sample moving from the front monitoring element 31 to the end monitoring element 32 within the delivery tube, in meters.

[0118] S, sludge concentration, unit: gm -3 ;

[0119] A, Cross-sectional area of ​​the conveying pipe, unit: m 2 ;

[0120] DO1, Real-time front-end data, unit: gm -3 ;

[0121] DO2, real-time data from the endpoint, unit: gm -3 ;

[0122] OUR, sample oxygen consumption rate, unit: gOs -1 g -1 SS.

[0123] Here, OUR refers to the oxygen consumption rate, and its unit means the amount of oxygen consumed per unit of sludge per unit time.

[0124] That is, g - gram, O - oxygen, SS - sludge, s - second.

[0125] It should be noted that if the real-time data from the front end does not meet the usage requirements during use, i.e., DO1 < DO1s, the aeration component 7 should be turned on to increase the auxiliary aeration volume until DO1 > DO1s.

[0126] Of course, if the real-time data at the front end meets the usage requirements, but the real-time data at the back end does not, that is, if DO1 > DO1s and DO2 < DO2s, the power of the delivery pump 22 is increased to improve the sample movement speed until the real-time data at the back end meets the usage requirements, that is, after DO2 > DO2s, each data is substituted into the formula for determining OUR.

[0127] If the aeration intensity of the aeration component 7 reaches its maximum value, but DO1 still does not reach the preset value, the front-end monitoring component 31 is corrected and maintained, for example, by detecting whether the front-end monitoring component 31 is contaminated.

[0128] For example, when measuring samples in an anaerobic zone, the acid consumption rate is measured, such as HUR. The preset value at the front end is pH1s, with a default value of 7.5, and the preset value at the end end is pH2s, with a default value of 8.0. The front end monitoring device 31 measures the real-time data pH1 at the front end of the sample, and the end monitoring device 32 measures the real-time data pH2 at the end of the sample.

[0129] The measurement formula is:

[0130] In the formula:

[0131] v, the velocity of the sample moving within the delivery tube, in milliseconds (ms). -1 ;

[0132] L is the length of the sample moving from the front monitoring element 31 to the end monitoring element 32 within the delivery tube, in meters.

[0133] S, sludge concentration, unit: gm -3 ;

[0134] A, Cross-sectional area of ​​the conveying pipe, unit: m 2 ;

[0135] pH1, real-time data from the front end;

[0136] pH2, real-time data at the end;

[0137] HUR, the rate of hydrogen ion consumption in the sample, in mol / s. -1 g -1 ss.

[0138] HUR refers to the hydrogen ion consumption rate, and its unit means the rate at which hydrogen ions are consumed per unit amount of sludge per unit time.

[0139] That is, Mol - mole, g - gram, s - second, SS - sludge.

[0140] It should be noted that if the real-time data from the front end does not meet the usage requirements during use, i.e., pH1 < pH1s, the dosing pump should be turned on and the medicine should be added until pH1 > pH1s.

[0141] Of course, since hydrogen ions are continuously consumed during the measurement of acidity consumption rate, the alkalinity continuously increases. Therefore, if the real-time data at the front end meets the requirements, but the real-time data at the back end does not, i.e., pH1 > pH1s and pH2 > pH2s, it is necessary to increase the power of the delivery pump 22 to increase the sample movement speed until the real-time data at the back end meets the requirements. That is, after pH2 < pH2s, the data are substituted into the formula for determining HUR.

[0142] If the pH1 does not reach the preset value when the dosing pump flow parameters reach their maximum, the front-end monitoring device 31 is calibrated and maintained. For example, the front-end monitoring device 31 is checked for contamination, the dosing pipe 62 is checked for blockage, and the dosing pipe 62 is cleaned.

[0143] In addition, since the formulas for calculating OUR and HUR both contain sludge concentration S, it is necessary to measure the sludge concentration S.

[0144] Specifically: In one embodiment, before installing the sludge activity monitoring device in the biological tank, the method further includes the steps of: setting a transmittance preset value Ts at the control terminal 4; and before calculating the sample activity, such as... Figure 4and Figure 5 As shown, the method also includes the following steps: measuring the real-time transmittance data T and determining whether the real-time transmittance data T is greater than the preset transmittance value Ts; if the real-time transmittance data T is greater than the preset transmittance value Ts, calculating the sample concentration; if the real-time transmittance data T is less than the preset transmittance value Ts, increasing the power of the transmission pump and increasing the sample movement speed until the real-time transmittance data T is greater than the preset transmittance value T, then calculating the sample concentration S.

[0145] The sample concentration is calculated using the formula S = k / (T0-T).

[0146] Specifically, k is the ratio coefficient of light transmittance to sludge concentration, g / m³. 2 The slope can be calculated periodically by manually measuring the transmittance at different sludge concentrations.

[0147] T0, the light transmittance of clean water inside the transmission pipe 21, in meters. -1 .

[0148] T represents the light transmittance during the transfer of activated sludge inside the transfer pipe 21, in meters. -1 .

[0149] S, sludge concentration, in gm³. -3 .

[0150] With this setting, by setting a preset transmittance value Ts and comparing it with the actual measured real-time transmittance data T, the transparency of the current sludge sample can be accurately determined, which helps to accurately assess the sludge concentration.

[0151] Simultaneously, if the real-time transmittance data T is found to be lower than the preset value Ts, the power of the transmission pump is increased to improve the sample movement speed until the transmittance reaches or exceeds the preset value. That is, by using a dynamic adjustment mechanism, the sample is ensured to be in an optimal movement state.

[0152] Furthermore, this method uses a linear relationship between sludge concentration and sludge transmittance to represent sludge concentration, requiring only periodic manual measurement for verification, thus simplifying monitoring costs, reducing monitoring cycles, and increasing the frequency of data monitoring.

[0153] The preset transmittance value Ts is 0.

[0154] It should be noted that a calibration step should be performed before installing the sludge activity monitoring device in the biological tank.

[0155] For example, the maximum aeration intensity of aeration element 7 was corrected through a clean water test.

[0156] Specifically, the entire device is placed in clean water, and the aeration intensity of the oxygenation aeration element 7 is gradually increased until the data measured by the end monitoring element 32 is greater than the data measured by the front monitoring element 31. At this point, it indicates that the aeration volume is large enough to cause the bubbles to continue to dissolve after passing through the front monitoring element 31.

[0157] The above describes the sludge activity monitoring method provided in the embodiments. By measuring the DO and pH values ​​of the samples, the sludge activity, namely OUR (oxygen consumption rate) and HUR (hydrogen ion consumption rate), is calculated. Among these, DO and pH values ​​have high measurement sensitivity compared to other water quality parameters such as ammonia nitrogen, COD, and nitrate nitrogen, are less affected by interference factors, are easier to obtain data, and are more reliable in evaluating sample activity.

[0158] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A sludge activity monitoring device, characterized in that, This includes a sampling structure, a transmission structure (2), and a monitoring structure (3) placed within the reaction tank, wherein, The sampling structure includes a water sample collection chamber (11), which is provided with an inlet (111) and an outlet (112). The inlet (111) of the water sample collection chamber (11) is connected to the reaction tank. The transmission structure (2) includes a transmission tube (21) and a delivery pump (22). The inlet end of the transmission tube (21) is connected to the outlet (112) of the water sample collection chamber (11). The delivery pump (22) is installed on the transmission tube (21) to drive the sample inside the transmission tube (21) toward the outlet end of the transmission tube (21). The monitoring structure (3) includes a front-end monitoring element (31) and a terminal monitoring element (32). Both the front-end monitoring element (31) and the terminal monitoring element (32) are installed on the transmission tube (21) along the sample movement direction. The terminal monitoring element (32) is located downstream of the front-end monitoring element (31). There are two front-end monitoring elements (31), which are used to measure the front-end DO real-time data and the front-end pH real-time data, respectively. There are two terminal monitoring elements (32), which are used to measure the terminal DO real-time data and the terminal pH real-time data, respectively. The control terminal (4) is communicatively connected to the delivery pump body (22), the electrical connection terminal of the front-end monitoring device (31), and the electrical connection terminal of the end monitoring device (32); The degassing structure (5) includes a first guide (51) and a cyclone separator (53). The first guide (51) is installed inside the water sample collection chamber (11). Along the sample movement direction, the distance between the first guide (51) and the first side plate (113) of the water sample collection chamber (11) gradually decreases to form an acceleration zone (a). Along the sample movement direction, the cyclone separator (53) is installed between the outlet (112) of the water sample collection chamber (11) and the transmission pipe (21). Aeration element (7) is installed in acceleration zone (a).

2. The sludge activity monitoring device according to claim 1, characterized in that, The water sample collection chamber (11) is also provided with a second side plate (114) and a third side plate (115). The second side plate (114) and the third side plate (115) are spaced apart and form a first air outlet (116). In the sample movement direction, the third side plate (115) is located downstream of the second side plate (114). The distance between the second side plate (114) and the third side plate (115) gradually decreases and forms a diversion zone (b). The first guide (51) is used to guide the sample to the second side plate (114) of the water sample collection chamber (11), where the sample is redirected and enters the diversion zone (b).

3. The sludge activity monitoring device according to claim 1, characterized in that, The degassing structure (5) also includes: The second guide (52) is installed inside the water sample collection chamber (11) near the water inlet (111). The second guide (52) is provided with a first guide surface (521). The first guide surface (521) is located on the upstream side of the first guide (51). In the sample movement direction, the distance between the first guide surface (521) and the first side plate (113) gradually decreases, which is used to guide the sample at the water inlet (111) to the acceleration zone (a).

4. The sludge activity monitoring device according to claim 3, characterized in that, The second guide member (52) is also provided with a second guide surface (522). In the sample moving direction, the distance between the second guide surface (522) and the first side plate (113) gradually decreases. The second guide surface (522) is provided on the downstream side of the acceleration zone (a), and the second guide surface (522) is spaced apart from the second guide member (52) to form a reflux zone (c) that communicates with the acceleration zone (a).

5. The sludge activity monitoring device according to any one of claims 1-4, characterized in that, The sludge activity monitoring device also includes a dosing structure (6), which includes: The dosing chamber (61) has its outlet connected to the transmission tube (21) via the dosing tube (62). Along the sample moving direction, the dosing chamber (61) is located upstream of the front-end monitoring device (31). A dosing pump body (63) is installed on the dosing pipe body (62) and is communicatively connected to the control terminal (4).

6. The sludge activity monitoring device according to any one of claims 1-4, characterized in that, The sludge activity monitoring device also includes: Speed-up component (8) is installed at the inlet (111) of the water sample collection chamber (11).

7. The sludge activity monitoring device according to any one of claims 1-4, characterized in that, The monitoring structure (3) also includes: A light source generator (33) emits a light source toward the transmission tube (21); A light source receiver (34) receives the transmitted light after it has passed through the sample.

8. A method for monitoring sludge activity, using the sludge activity monitoring device according to any one of claims 1-7, characterized in that, Monitoring methods include: Install the sludge activity monitoring device inside the biological tank; The sludge activity monitoring device takes samples and performs defoaming. The defoamed sample is transported into the transfer tube (21), and the front-end real-time signal and the end-end real-time signal are obtained sequentially through the front-end monitoring device (31) and the end-end monitoring device (32); The front-end real-time signals and the terminal real-time signals are transmitted to the data terminal for processing and converted into front-end real-time data and terminal real-time data, respectively.

9. The sludge activity monitoring method according to claim 8, characterized in that, The procedure further includes the following steps before installing the sludge activity monitoring device in the biological tank: Set the front-end preset value and the end preset value at the control terminal (4); After transmitting the front-end real-time signal and the terminal real-time signal to the data terminal for processing and converting them into front-end data and terminal data, the process further includes the following steps: Based on the relationship between the real-time front-end data and the preset front-end values, determine whether the real-time front-end data meets the usage requirements; If the real-time data at the front end meets the usage requirements, compare the size relationship between the real-time data at the back end and the preset value at the back end. If the real-time data at the front end does not meet the usage requirements, adjust the measurement environment inside the transmission tube (21) until the real-time data at the front end meets the usage requirements; If the real-time data from the end-point device meets the usage requirements, calculate the sample activity; If the real-time data at the end does not meet the requirements, increase the power of the transmission pump and increase the sample movement speed until the real-time data at the end meets the requirements, then calculate the sample activity. Among them, the situations in which the real-time data from the front end does not meet the usage requirements include: DO1 < DO1s, or pH1 < pH1s; When DO1 < DO1s, turn on the aeration unit (7) to increase the auxiliary aeration volume until DO1 > DO1s; When pH1 < pH1s, turn on the dosing pump (63) and add the drug until pH1 > pH1s.

10. The sludge activity monitoring method according to claim 9, characterized in that, The procedure further includes the following steps before installing the sludge activity monitoring device in the biological tank: Set the transmittance preset value Ts at the control terminal (4); Before the step of calculating sample activity, the following step is also included: Measure the real-time transmittance data T and determine whether the real-time transmittance data T is greater than the preset transmittance value Ts; If the real-time transmittance data T is greater than the preset transmittance value Ts, calculate the sample concentration; If the real-time transmittance data T is less than the preset transmittance value Ts, increase the power of the transmission pump and increase the sample movement speed until the real-time transmittance data T is greater than the preset transmittance value T, then calculate the sample concentration S. The formula for calculating the sample concentration S is: S = k / (T0 - T); In the formula: k is the ratio coefficient of light transmittance to sludge concentration, in g / m³. 2 ; T0, the transmittance of light when the sample in the transfer pipe is clear water, in m -1 ; T represents the transmittance of light when the sample inside the transport pipe is activated sludge, measured in m. -1 ; S, sludge concentration, g·m -3 .

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