Sludge activity monitoring device and method

Abstract

The invention relates to the technical field of sewage treatment, and discloses a sludge activity monitoring device and method. According to the sludge activity monitoring device provided by the invention, the sampling structure, the transmission structure and the monitoring structure are directly placed in the reaction tank, so that sampling, transmission and monitoring links of a sample can be realized in the reaction tank, the difference caused by temperature change in the sampling and transmission processes is reduced, and the sludge activity is monitored under the action of the conveying pump body. It is ensured that samples collected in the water sump collection bin are rapidly and continuously conveyed to the front-end monitoring piece and the tail-end monitoring piece in the conveying pipe body of the reaction tank, accurate data are provided in time, continuous measurement can be achieved, the law of sample activity change can be captured, the measurement result is more reliable, a large amount of data is accumulated, and the accuracy of measurement is improved. Sufficient samples are provided for follow-up intelligent regulation and control and data filtering, operation and maintenance personnel are helped to make adjustment quickly, and the automatic monitoring process of sampling, transmission, monitoring and data transmission is achieved by arranging a control terminal.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sludge activity monitoring device and method. Background Art

[0002] In the current field of sewage treatment technology, activated sludge method 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 typically characterized by pollutant degradation rates. Traditionally, this is measured by collecting sludge samples for pollutant degradation experiments. For example, activated sludge samples are collected from a sewage treatment site, transported to a laboratory, and then their oxygen and acidity consumption rates are measured.

[0004] However, in the actual measurement process, it was found that the sludge activity will be affected by the environment such as temperature during collection and transportation, and the sludge concentration such as sedimentation and biodegradation. In addition, the process after removing the sludge will take a certain amount of time. To obtain sufficient sample data, it is necessary to repeat the complete sampling, transportation, injection, and monitoring processes many times, resulting in a low frequency of sludge measurement and a long measurement cycle. It is difficult to depict the continuous changes in microbial metabolism under real conditions, making the measurement results unreliable, causing the test results to deviate from the actual working conditions, and affecting the subsequent control measures such as 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 measurement results after sludge collection and transportation.

[0006] In the first aspect, the present invention provides a sludge activity monitoring device, comprising a sampling structure, a transmission structure, and a monitoring structure placed in a reaction tank. The sampling structure comprises a water sample collection chamber, the water sample collection chamber being provided with a water inlet and a water outlet, the water inlet of the water sample collection chamber being connected to the reaction tank; the transmission structure comprises a transmission pipe body and a delivery pump body, the inlet end of the transmission pipe body being connected to the water outlet of the water sample collection chamber, the delivery pump body being installed on the transmission pipe body to drive the sample inside the transmission pipe body toward the outlet end of the transmission pipe body; the monitoring structure comprises a front-end monitoring component and a terminal monitoring component, both of which are installed on the transmission pipe body, and the terminal monitoring component is arranged downstream of the front-end monitoring component along the sample movement direction; the control terminal is communicatively connected with the delivery pump body, the electrical connection end of the front-end monitoring component, and the electrical connection end of the terminal monitoring component.

[0007] Beneficial effects: By placing the sampling structure, transmission structure and monitoring structure directly in the reaction pool, the sampling, transmission and monitoring of samples can be realized in the reaction pool, reducing the differences caused by temperature changes during sampling and transmission. At the same time, under the action of the delivery pump body, it is ensured that the samples collected in the water tank collection chamber can be quickly and continuously transported to the front-end monitoring device and the terminal monitoring device in the transmission pipe body of the reaction pool, which can provide accurate data in a timely manner and can also achieve continuous measurement, which helps to capture the law of changes in sample activity, making the measurement results more reliable, and accumulating a large amount of data, providing sufficient samples for subsequent intelligent regulation and data filtering, helping operation and maintenance personnel to make quick adjustments. In addition, by setting up a control terminal, the automated monitoring process of sampling, transmission, monitoring, and data transfer can be realized.

[0008] In an optional embodiment, the sludge activity monitoring device also includes a degassing structure, which includes 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 a speed-up zone.

[0009] In an 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, in the direction of sample movement, the third side plate is located on the downstream side of the second side plate, and the distance between the second side plate and the third side plate gradually decreases and forms a diversion area; the first guide member is used to guide the sample to the second side plate of the water sample collection chamber, and the sample changes direction at the second side plate and enters the diversion area.

[0010] In an optional embodiment, the degassing structure also includes a second guide member, which is installed inside the water sample collection chamber near the water inlet. The second guide member is provided with a first guide surface, and the first guide surface is arranged on the upstream side of the first guide member. In the direction of sample movement, the distance between the first guide surface and the first side plate gradually decreases, which is used to guide the sample at the water inlet to the speed-up zone.

[0011] In an optional embodiment, the second guide member is further provided with a second guide surface, and in the direction of sample movement, the distance between the second guide surface and the first side plate gradually decreases, the second guide surface is arranged on the downstream side of the speed-up zone, and the second guide surface is spaced apart from the second guide member to form a reflux zone connected to the speed-up zone.

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

[0013] In an optional embodiment, the sludge activity monitoring device also includes a dosing structure, which includes a dosing tank, a dosing tube body and a dosing pump body. The liquid outlet of the dosing tank is connected to the transmission tube body through the dosing tube body. Along the sample movement direction, the dosing tank is located on the upstream side of the front-end monitoring component; the dosing pump body is installed on the dosing tube body, and the dosing pump body is communicatively connected to the control terminal.

[0014] In an optional embodiment, the sludge activity monitoring device further includes an aeration element, which is installed in the speed-up zone.

[0015] In an optional embodiment, the sludge activity monitoring device further includes a speed-increasing component, which is installed at the water inlet of the water sample collection chamber.

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

[0017] In a second aspect, the present invention further provides a sludge activity monitoring method, utilizing the sludge activity monitoring device provided in the first aspect. The monitoring method comprises: installing the sludge activity monitoring device within a biological pond; sampling the sludge activity monitoring device and removing bubbles; transporting the defoamed sample into a transmission pipe, sequentially obtaining a front-end real-time signal and a terminal real-time signal through a front-end monitoring component and a terminal real-time monitoring component, respectively; and transporting the front-end real-time signal and the terminal real-time signal to a data terminal for processing and conversion into front-end real-time data and terminal real-time data.

[0018] Beneficial effects: By installing the sludge activity monitoring device in the biological pool, the sampling, transmission, and measurement processes of the sample all take place in the biological pool. By removing bubbles and continuously monitoring the real-time data at the front end and the end, the real changing trend of the sample activity can be better reflected, ensuring that the measurement results of the sample activity are close to the actual situation, making the measurement results more reliable. At the same time, through continuous measurement, a large amount of data can be collected to provide data support for improving the existing process flow and to help formulate maintenance plans when evaluating samples later. In addition, based on the real-time data collection and analysis at the front end and the end, real-time feedback can be provided to the operation and maintenance personnel, and key operating parameters such as aeration volume and dosage can be adjusted according to the current operating status, thereby optimizing the treatment effect.

[0019] In an optional embodiment, before the sludge activity monitoring device is installed in the biological pool, the following steps are also included: setting a front-end preset value and a terminal preset value at the control terminal; after the front-end real-time signal and the terminal real-time signal are transmitted to the data terminal for processing and converted into front-end data and terminal data, the following steps are also included: judging whether the front-end real-time data meets the usage requirements based on the size 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 size relationship between the terminal real-time data and the terminal preset value; if the front-end real-time data does not meet the usage requirements, adjusting the measurement environment in the transmission pipe until the front-end real-time data meets the usage requirements; if the terminal real-time data meets the usage requirements, calculating the sample activity; if the terminal real-time data does not meet the usage requirements, increasing the transmission pump power and increasing the sample movement speed until the terminal real-time data meets the usage requirements and then calculating the sample activity.

[0020] In an optional embodiment, before the sludge activity monitoring device is installed in the biological pool, the following steps are included: setting a preset transmittance value Ts at the control terminal; before the sample activity calculation step, the following steps are included: measuring the real-time transmittance data T, and judging 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 transmittance; if the real-time transmittance data T is less than the preset transmittance value Ts, increasing the transmission pump power and increasing the sample movement speed until the real-time transmittance data T is greater than the preset transmittance value T, and then calculating the sample concentration S; wherein, the sample concentration S is calculated as follows: S = k / (T0-T); wherein: k is the ratio coefficient of transmittance to sludge concentration, g / m 2 ; T0, transmittance when the sample in the transmission pipeline is clear water, m -1 ; T, transmittance when the sample in the measurement state transmission pipeline is activated sludge, m -1 ; S, sludge concentration, gm -3 . BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

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

[0024] Figure 3 A schematic diagram of a process for monitoring sludge activity according to an embodiment of the present invention;

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

[0026] Figure 5 This is a flow chart of the sludge activity monitoring method provided in an embodiment of the present invention for measuring pH1 data and calculating HUR.

[0027] Description of reference numerals:

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

[0029] 2. Transmission structure; 21. Transmission pipe body; 22. Transmission 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 member; 52. Second guide member; 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 parts;

[0035] 8. Speed-up parts;

[0036] a. Speed-up zone; b. Diversion zone; c. Reflux zone. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0039] In addition, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] In addition, 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 combination Figures 1 to 5 , describing embodiments of the present invention.

[0043] According to an embodiment of the present invention, on the one hand, 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 provided with a water inlet 111 and a water outlet 112 , and the water inlet 111 of the water sample collection chamber 11 is communicated with the reaction tank.

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

[0047] The monitoring structure 3 includes a front monitoring component 31 and a terminal monitoring component 32 . Both the front monitoring component 31 and the terminal monitoring component 32 are mounted on the transmission tube 21 . Along the sample moving direction, the terminal monitoring component 32 is arranged downstream of the front monitoring component 31 .

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

[0049] With this arrangement, by placing the sampling structure, transmission structure 2 and monitoring structure 3 directly in the reaction pool, the sampling, transmission and monitoring of samples can be realized in the reaction pool, reducing the differences caused by temperature changes during the sampling and transmission process.

[0050] At the same time, under the action of the delivery pump body 22, the samples collected in the water tank collection chamber can be continuously transported to the front-end monitoring component 31 and the terminal monitoring component 32 in the transmission pipe body 21 of the reaction pool to achieve continuous measurement. It can provide timely and accurate data, help capture the law of changes in sample activity, make the measurement results more reliable, and accumulate a large amount of data to provide sufficient samples for subsequent intelligent control and data filtering, helping operation and maintenance personnel to make adjustments quickly.

[0051] In addition, by setting up the control terminal 4, the automation process of sampling, transmission, monitoring, and data transmission can be realized. At the same time, in the process of monitoring the activity of the sample, if it is found that the measurement requirements are not met, the control terminal 4 can promptly adjust the working parameters of the delivery pump body 22, such as power, so as to timely control the flow rate and realize intelligent regulation.

[0052] It can be explained that the sample is a sludge mixed solution.

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

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

[0055] Likewise, if Figure 2 As shown, two terminal monitoring components 32 are provided, which are used to measure the terminal DO real-time data and the terminal pH real-time data respectively.

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

[0057] It can be explained that the control terminal 4 is used to receive the signals fed back by the front-end monitoring component 31 and the terminal monitoring component 32 and form the front-end real-time data and the terminal real-time data, and generate different signals according to the real-time feedback data, and feed them back to the electrical control components such as the delivery pump body 22, so as to realize the control of the monitoring equipment, such as Figure 4 and Figure 5 shown.

[0058] Furthermore, the control terminal 4 includes a data processing module and a cloud processing module. The data processing module is installed in the reaction pool through encapsulation protection to avoid corrosion, erosion and other damage to the data processing module; the cloud processing module is located outside the reaction pool and is communicated with the data processing module.

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

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

[0061] With this arrangement, the addition of the degassing structure 5 allows for the preliminary separation of bubbles from the sample. Specifically, by adding a first guide member 51 and gradually reducing the distance between the first guide member 51 and the first side plate 113 of the water sample collection chamber 11 along the direction of sample movement, an acceleration zone a is formed. This accelerates the sample's movement into the acceleration zone a, helping bubbles to escape from the sample, reducing the bubble content within the sample and minimizing interference with subsequent monitoring. For example, a large number of bubbles can affect the operation of the monitoring terminal of the monitoring device, leading to signal distortion and impacting measurement accuracy.

[0062] In one embodiment, 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 on the downstream side 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 area 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, and the sample changes direction at the second side plate 114 and enters the diversion area b.

[0063] In this arrangement, by providing the water sample collection chamber 11 with a second side plate 114, the sample can quickly move to the second side plate 114 after passing through the speed-up zone a, and enter the diversion zone b after completing the reversal. At this time, by setting the third side plate 115 on the downstream side 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] That is, by optimizing the sample flow path, the bubble content in the sample after diversion is reduced, further reducing the interference caused by bubbles to subsequent monitoring, which helps to achieve an efficient and accurate sample monitoring process.

[0065] It can be noted that, in the present 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, in order to facilitate the use of the density characteristics of each material, the first gas outlet 116, the water outlet 112 and the water inlet 111 are arranged in sequence along the height direction (gravity direction) to realize bottom feeding and gradually rise. After the bubbles are separated, the gas is discharged from the first gas outlet 116, and the remaining sludge and its solution in the sample will enter the water outlet 112 and be measured in real time in the transmission pipe body 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 speed-up path is constructed.

[0068] Specifically, if Figure 1 and Figure 2 As shown, the degassing structure 5 also includes a second guide member 52, which 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, and the first guide surface 521 is arranged on the upstream side of the first guide member 51. In the direction of sample movement, 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] In this way, 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 can ensure that the sample entering from the water inlet 111 is guided into the acceleration zone a, and help to initially accelerate the sample at the water inlet 111.

[0070] At the same time, with the setting of the speed-up zone a, a multi-level guiding and speed-up mechanism is constructed to ensure the effective separation of bubbles inside the sample.

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

[0072] For example, Figure 2 As shown, the second guide member 52 is also provided with a second guide surface 522. In the direction of sample movement, the distance between the second guide surface 522 and the first side plate 113 gradually decreases. The second guide surface 522 is arranged 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 connected to the acceleration zone a.

[0073] In this way, by adding a second guide surface 522 to the second guide member 52, and setting the second guide surface 522 on the downstream side of the speed-up 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 recirculation zone c is formed to help the sample that has not entered the water outlet 112 to circulate through the recirculation zone c to the speed-up zone a for reuse.

[0074] At the same time, the refluxed sample enters the sample at the water inlet 111, thereby achieving stirring, which helps to accelerate the separation of bubbles from the sample.

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

[0076] In order to further improve the separation effect of bubbles and reduce the interference of bubbles on the measurement results, in one embodiment, Figure 1 and Figure 2 As shown, the degassing structure 5 further includes a cyclone separator 53 . Along the sample moving direction, the cyclone separator 53 is installed between the water outlet 112 of the water sample collection chamber 11 and the transmission pipe body 21 .

[0077] In this arrangement, a cyclone separator 53 is added between the water outlet 112 of the water sample collection chamber 11 and the transmission tube body 21. Because it is based on the principle of centrifugal force, the sample moves downward along the wall of the cyclone separator 53, and the lighter bubbles gather toward the center and are discharged outward, so that the tiny bubbles are separated again before the sample enters the transmission tube body 21, thereby improving the overall degassing efficiency.

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

[0079] A second gas outlet 531 is provided on the top of the cyclone separator 53 for timely discharging the gas inside the cyclone separator 53 .

[0080] In one embodiment, Figure 1 As shown, the sludge activity monitoring device also includes a dosing structure 6, which includes a dosing bin 61, a dosing tube 62 and a dosing pump 63. The liquid outlet of the dosing bin 61 is connected to the transmission tube 21 through the dosing tube 62. Along the sample movement direction, the dosing bin 61 is located on the upstream side of the front-end monitoring component 31; the dosing pump 63 is installed on the dosing tube 62, and in order to realize intelligent regulation, the dosing pump 63 is communicatively connected to the control terminal 4.

[0081] In this arrangement, by connecting the liquid outlet of the dosing chamber 61 to the transmission tube body 21 through the dosing tube body 62, setting the dosing chamber 61 upstream of the front-end monitoring component 31, installing the dosing pump body 63 on the dosing tube body 62, and communicating with the control terminal 4, the physical or chemical properties of the environment in which the sample is located, such as the pH value, can be adjusted in time, which is helpful for subsequent accurate monitoring of the activity of the sample.

[0082] The drug adding structure 6 is mainly used to supplement the acidity of the sample environment, that is, to adjust the pH value. HCl is often used as the added drug.

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

[0084] That is, each nitrate ion denitrified consumes 6 hydrogen ions, and the pH monitoring accuracy is high, the interference is small, and the cost is lower.

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

[0086] Preferably, if Figure 2 As shown, the aeration element 7 is installed in the speed-up zone a.

[0087] In this configuration, by adding the aeration element 7 in the speed-up zone a, sufficient oxygen supply is ensured and the environmental conditions required for microbial metabolism are optimized.

[0088] At the same time, the sample can be stirred to prevent the sedimentation of suspended solids, and when monitoring the activity of samples in the aerobic zone, the local anaerobic environment can be avoided, which will affect the monitoring results.

[0089] 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 explained that, in order to further improve the separation effect of bubbles, in one embodiment, Figure 2 As shown, the sludge activity monitoring device further includes a speed-up component 8 , which is installed at the water inlet 111 of the water sample collection chamber 11 .

[0091] In this arrangement, by adding a speed-up component 8 at the water inlet 111 of the water sample collection chamber 11, the movement 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 separate from the sample and be discharged from the air outlet.

[0092] At the same time, it prevents the sample from accumulating at the water inlet 111, reducing the risk of clogging.

[0093] Preferably, the speed-increasing member 8 is selected as a spiral propulsion device with a spiral entity structure, which helps to remove the sludge from the reaction tank.

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

[0095] With such a configuration, by adding a light source generator 33 and a light source receiver 34, the transmittance of the sample can be measured in real time, the automation process of sample monitoring can be improved, the error caused by manual intervention can be reduced, the measurement data can be ensured to be more reliable, and manual operations can be reduced, thus saving labor costs.

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

[0097] It can be explained that the control terminal 4 provided above is communicatively connected with 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 embodiment is completely placed inside the bioreactor during use. Its bioreactor conditions (temperature, sludge concentration, etc.) are completely consistent with the location in the bioreactor 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 body 21, the delivery pump body 22, the front-end monitoring component 31, the end monitoring component 32, the light source generator 33, the light source receiver 34, the dosing chamber 61, the dosing pipe body 62, and the dosing pump body 63 are all protected by an outer shell and placed in the reaction tank to avoid corrosion, erosion and damage to the components.

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

[0101] Specifically, the cleaning structure includes an ultrasonic cleaning component. In this case, the transmission tube body 21 is configured to be detachable for regular disassembly, cleaning, and replacement.

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

[0103] According to an embodiment of the present invention, on the other hand, a sludge activity monitoring method is provided, which adopts the sludge activity monitoring device provided in the previous aspect.

[0104] Specifically, if Figure 3 As shown, the sludge activity monitoring method includes: installing a sludge activity monitoring device in a biological pool; sampling the sludge activity monitoring device and removing bubbles; transporting the defoamed sample into a transmission pipe body 21, and obtaining a front-end real-time signal and a terminal real-time signal through a front-end monitoring component 31 and a terminal monitoring component 32 respectively; transporting the front-end real-time signal and the terminal real-time signal to a data terminal for processing and converting them into front-end real-time data and terminal real-time data.

[0105] In this way, by installing the sludge activity monitoring device in the biological pool, the sample sampling, transmission and measurement processes all take place in the biological pool. By removing bubbles and continuously monitoring the real-time data at the front and end, the real change trend of the sample activity can be better reflected, ensuring that the measurement results of the sample activity are close to the actual situation, making the measurement results more reliable.

[0106] At the same time, through continuous measurement, a large amount of data can be collected to provide data support for improving existing process flows and to help formulate maintenance plans when evaluating samples later.

[0107] In addition, based on real-time data collection and analysis at the front end and the end, real-time feedback can be provided to operation and maintenance personnel, and key operating parameters such as aeration volume 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 in the transmission tube body 21 meets the usage requirements.

[0109] In one embodiment, before the sludge activity monitoring device is installed in the biological pool, the steps are also included: setting the front-end preset value and the terminal preset value at the control terminal 4; after the front-end real-time signal and the terminal real-time signal are transmitted to the data terminal for processing and converted into front-end data and terminal data, the steps are also included: judging 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 terminal real-time data meets the usage requirements; if the front-end real-time data meets the usage requirements, compare the size relationship between the terminal real-time data and the terminal preset value; if the front-end real-time data does not meet the usage requirements, adjust the measurement environment in the transmission tube body 21 until the front-end real-time data meets the usage requirements; if the terminal real-time data meets the usage requirements, calculate the sample activity; if the terminal real-time data does not meet the usage requirements, increase the transmission pump body power and increase the sample movement speed until the terminal real-time data meets the usage requirements and then calculate the sample activity.

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

[0112] At the same time, by using a dynamic adjustment mechanism, the data is ensured to be more reliable. For example, when it is detected that the front-end real-time data is lower than the preset value, the control terminal 4 will adjust the measurement environment in the transmission pipe body 21 until the front-end real-time data 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 front-end preset value is DO1s, the default value is 1 mg / L, and the terminal preset value is DO2s, the default value is 0. The front-end monitoring component 31 measures the real-time data DO1 of the sample front end, and the terminal monitoring component 32 measures the real-time data DO2 of the sample terminal;

[0114] The measurement formula is:

[0115] Where:

[0116] v, the sample moving speed in the delivery tube, unit: ms -1 ;

[0117] L is the length of the sample moving from the front monitoring component 31 to the end monitoring component 32 in the conveying tube, unit: m;

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

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

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

[0121] DO2, terminal real-time data, unit: gm -3 ;

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

[0123] Among them, OUR refers to the oxygen consumption rate, and its unit means: the oxygen consumed by unit sludge per unit time.

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

[0125] It should be noted that, during use, if the front-end real-time data does not meet the use requirements, that is, DO1 < DO1s, the aeration element 7 is opened to increase the auxiliary aeration volume until DO1 > DO1s.

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

[0127] If the aeration intensity of the aeration element 7 reaches the maximum value but DO1 still does not reach the preset value, the front-end monitoring element 31 is corrected and maintained, for example, the front-end monitoring element 31 is checked for contamination.

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

[0129] The measurement formula is:

[0130] Where:

[0131] v, the sample moving speed in the delivery tube, unit: ms -1 ;

[0132] L is the length of the sample moving from the front monitoring component 31 to the end monitoring component 32 in the conveying tube, unit: m;

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

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

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

[0136] pH2, terminal real-time data;

[0137] HUR, sample hydrogen ion consumption rate, unit: mol s -1 g -1 ss.

[0138] Among them, HUR refers to the hydrogen ion consumption rate, and its unit means: the rate of hydrogen ion consumption per unit sludge volume per unit time.

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

[0140] It should be noted that during use, if the front-end real-time data does not meet the use requirements, that is, pH1 < pH1s, start the dosing pump and add drugs until pH1 > pH1s.

[0141] Of course, since the process of measuring the acidity consumption rate continuously consumes hydrogen ions, resulting in a continuous increase in alkalinity, if the front-end real-time data meets the usage requirements but the end-end real-time data does not, that is, if pH1>pH1s and pH2>pH2s, it is necessary to increase the power of the delivery pump 22 and increase the sample movement speed until the end-end real-time data meets the usage requirements, that is, after pH2<pH2s, the data are substituted into the formula for determining HUR.

[0142] Among them, when the dosing pump flow working parameter reaches the maximum, if pH1 still does not reach the preset value, the front-end monitoring component 31 is corrected and maintained, for example, detecting whether the front-end monitoring component 31 is contaminated, checking whether the dosing tube 62 is blocked, and cleaning the dosing tube 62.

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

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

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

[0146] Specifically, k is the ratio coefficient of transmittance to sludge concentration, g / m 2 , which can be obtained by regularly manually measuring the transmittance at different sludge concentrations and calculating the slope.

[0147] T0, light transmittance inside the transmission tube 21 when transmitting clean water, m -1 .

[0148] T, light transmittance inside the transmission pipe 21 when transmitting activated sludge, m -1 .

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

[0150] In this way, by setting the 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 judged, which helps to accurately evaluate the sludge concentration.

[0151] At the same time, if the real-time transmittance data T is found to be lower than the preset value Ts, the transmission pump power is increased to increase the sample movement speed until the transmittance reaches or exceeds the preset value. In other words, by using this dynamic adjustment mechanism, the sample is ensured to be in an optimal movement state.

[0152] In addition, this method uses the linear relationship between sludge concentration and sludge transmittance to represent sludge concentration, and only requires regular manual measurement and calibration, which simplifies monitoring costs, reduces monitoring cycles, and increases data monitoring frequency.

[0153] The preset transmittance value Ts is 0.

[0154] It can be noted that a correction step should be performed before the step of installing the sludge activity monitoring device in the biological pond.

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

[0156] Specifically, place the entire device in clean water and gradually increase the aeration intensity of the oxygen-enhancing aeration component 7 until the data measured by the terminal monitoring component 32 is greater than the data measured by the front-end monitoring component 31. At this time, it means that the aeration volume is already large, so that the bubbles will continue to dissolve after passing through the front-end monitoring component 31.

[0157] The above is a sludge activity monitoring method provided in the Examples. By measuring the DO and pH values of a sample, sludge activity is calculated, namely, the OUR (oxygen consumption rate) and HUR (hydrogen ion consumption rate), respectively. Compared to other water quality parameters such as ammonia nitrogen, COD, and nitrate nitrogen, DO and pH values have high measurement sensitivity, are less susceptible to interference, and are easier to obtain data, making them more reliable for evaluating sample activity.

[0158] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A sludge activity monitoring device, characterized in that: It includes a sampling structure, a transmission structure (2) and a monitoring structure (3) placed in a reaction pool, wherein: The sampling structure comprises a water sample collection chamber (11), wherein the water sample collection chamber (11) is provided with a water inlet (111) and a water outlet (112), and the water inlet (111) of the water sample collection chamber (11) is connected to the reaction tank; The transmission structure (2) comprises a transmission tube body (21) and a transmission pump body (22), wherein the inlet end of the transmission tube body (21) is connected to the water outlet (112) of the water sample collection chamber (11), and the transmission pump body (22) is installed on the transmission tube body (21) to drive the sample inside the transmission tube body (21) to move toward the outlet end of the transmission tube body (21); The monitoring structure (3) includes a front-end monitoring component (31) and a terminal monitoring component (32), wherein both the front-end monitoring component (31) and the terminal monitoring component (32) are mounted on the transmission tube (21), and along the sample moving direction, the terminal monitoring component (32) is arranged downstream of the front-end monitoring component (31); A control terminal (4) is communicatively connected to the delivery pump body (22), the electrical connection end of the front-end monitoring component (31), and the electrical connection end of the terminal monitoring component (32).

2. The sludge activity monitoring device according to claim 1, characterized in that: The sludge activity monitoring device further comprises a degassing structure (5), wherein the degassing structure (5) comprises: A first guide member (51) is installed inside the water sample collection chamber (11). Along the sample movement direction, the distance between the first guide member (51) and the first side plate (113) of the water sample collection chamber (11) gradually decreases to form a speed-up zone (a).

3. The sludge activity monitoring device according to claim 2, characterized in that: The water sample collection chamber (11) is further 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), and in the sample movement direction, the third side plate (115) is located on the downstream side of the second side plate (114), and the spacing between the second side plate (114) and the third side plate (115) gradually decreases to form a diversion area (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), and the sample changes direction at the second side plate (114) and enters the diversion area (b).

4. The sludge activity monitoring device according to claim 2, characterized in that: The degassing structure (5) further comprises: A 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 arranged on the upstream side of the first guide member (51). In the direction of sample movement, the distance between the first guide surface (521) and the first side plate (113) gradually decreases, so as to guide the sample at the water inlet (111) to the acceleration zone (a).

5. The sludge activity monitoring device according to claim 4, characterized in that: The second guide member (52) is further provided with a second guide surface (522). In the direction of sample movement, the distance between the second guide surface (522) and the first side plate (113) gradually decreases. The second guide surface (522) is arranged 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 recirculation zone (c) connected to the acceleration zone (a).

6. The sludge activity monitoring device according to any one of claims 2 to 5, characterized in that: The degassing structure (5) further comprises: A cyclone separator (53) is installed between the water outlet (112) of the water sample collection chamber (11) and the transmission pipe body (21) along the sample moving direction.

7. The sludge activity monitoring device according to any one of claims 1 to 5, characterized in that: The sludge activity monitoring device further comprises a dosing structure (6), wherein the dosing structure (6) comprises: A drug-adding chamber (61), wherein the liquid outlet of the drug-adding chamber (61) is connected to the transmission tube (21) through a drug-adding tube (62), and the drug-adding chamber (61) is located on the upstream side of the front-end monitoring component (31) along the sample movement direction; A dosing pump body (63) is installed on the dosing tube body (62), and the dosing pump body (63) is communicatively connected to the control terminal (4).

8. The sludge activity monitoring device according to any one of claims 1 to 5, characterized in that: The sludge activity monitoring device also includes: An aeration element (7), wherein the aeration element (7) is installed in the speed-increasing zone (a).

9. The sludge activity monitoring device according to any one of claims 1 to 5, characterized in that: The sludge activity monitoring device also includes: A speed-up component (8) is installed at the water inlet (111) of the water sample collection chamber (11).

10. The sludge activity monitoring device according to any one of claims 1 to 5, characterized in that: The monitoring structure (3) further comprises: a light source generator (33), wherein the light source generator (33) emits light into the transmission tube body (21); A light source receiver (34) receives the transmitted light after passing through the sample.

11. A sludge activity monitoring method, using the sludge activity monitoring device according to any one of claims 1 to 10, characterized in that: Monitoring methods include: Install the sludge activity monitoring device in the biological pool; Sludge activity monitoring device takes samples and removes foam; The defoamed sample is transported into the transmission tube body (21), and the front-end real-time signal and the end-end real-time signal are respectively obtained through the front-end monitoring component (31) and the end-end monitoring component (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.

12. The sludge activity monitoring method according to claim 11, characterized in that: Before installing the sludge activity monitoring device in the biological pool, the method further includes the following steps: Setting a front-end preset value and a terminal preset value at a control terminal (4); After the front-end real-time signal and the terminal real-time signal are transmitted to the data terminal for processing and converted into front-end data and terminal data, the method further includes the following steps: Based on the size relationship between the front-end real-time data and the front-end preset value, determine whether the front-end real-time data meets the usage requirements; If the front-end real-time data meets the usage requirements, compare the size relationship between the terminal real-time data and the terminal preset value; If the front-end real-time data does not meet the use requirements, adjust the measurement environment in the transmission pipe body (21) until the front-end real-time data meets the use requirements; If the real-time data at the terminal meets the usage requirements, calculate the sample activity; If the real-time data at the terminal does not meet the usage requirements, increase the transmission pump power and increase the sample movement speed until the real-time data at the terminal meets the usage requirements, and then calculate the sample activity.

13. The sludge activity monitoring method according to claim 12, characterized in that: Before installing the sludge activity monitoring device in the biological pool, the method further includes the following steps: Setting a preset transmittance value Ts at a control terminal (4); Before the step of calculating the sample activity, the method further comprises the steps of: 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, the sample concentration is calculated; If the real-time transmittance data T is less than the preset transmittance value Ts, increase the transmission pump power and the sample moving speed until the real-time transmittance data T is greater than the preset transmittance value T, and then calculate the sample concentration S; The sample concentration S is calculated as follows: S = k / (T0-T); Where: k is the ratio coefficient of light transmittance to sludge concentration, g / m 2 ; T0, transmittance when the sample in the transmission pipeline is clear water, m -1 ; T, the transmittance of the sample in the measurement state transmission pipeline when it is activated sludge, m -1 ; S, sludge concentration, gm -3 .

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