Water treatment system, control device, water treatment method and program

Abstract

To add an optimum amount of flocculant.SOLUTION: A water treatment system has: an addition device 200 which adds a flocculant to water accumulated in a water tank 100; a water quality meter 300 which measures water quality of water to be treated flowing into the water tank 100; an imaging device 400 which images the state of the flocculant in water to which the flocculant is added by the addition device 200; and a control device 500 which controls the addition amount of the flocculant added by the addition device 200 on the basis of the water quality measured by the water quality meter 300 and the state of the flocculant imaged by the imaging device 400.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water treatment system, a control device, a water treatment method, and a program. [Background technology]

[0002] In water purification plants, sewage treatment plants, and other wastewater treatment facilities, a flocculant is added to the water to be treated, causing suspended solids (SS) in the water to flocculate and form flocs, which are then separated by sedimentation, flotation, etc. In this process, for example, a technique has been devised in which the turbidity of the raw water, which is the water to be treated, is measured and the amount of flocculant to be injected is calculated based on the measured turbidity (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-098236 Summary of the Invention [Problem to be solved by the invention]

[0004] Even if the turbidity of the water is the same, the substances contained in the water may differ depending on the surrounding environment, etc., and as a result, the state of the flocculants in the water may differ. Therefore, even if you only monitor the turbidity of the water to be treated, you may not be able to add the optimal amount of flocculant.

[0005] An object of the present invention is to provide a water treatment system, a control device, a water treatment method, and a program that are capable of adding an optimal amount of coagulant. [Means for solving the problem]

[0006] The water treatment system of the present invention comprises: a water tank into which the water to be treated flows; an adding device that adds a flocculant to the water stored in the water tank; a water quality meter for measuring the quality of the water to be treated flowing into the water tank; an imaging device that images the state of the flocculant in the water to which the flocculant has been added from the adding device; The apparatus has a control device that controls the amount of flocculant added by the addition device based on the water quality measured by the water quality meter and the state of the flocculant imaged by the imaging device.

[0007] The control device of the present invention also includes: a calculation unit that calculates an amount of flocculant to be added to water stored in a water tank into which the water to be treated flows, based on the water quality of the water to be treated measured by the water quality meter; an image processing unit that calculates the state of the flocculants based on an image captured by an imaging device that captures images of the flocculants in the water to which the flocculant has been added; The apparatus further includes a control unit that controls the amount of the flocculant to be added based on the amount calculated by the calculation unit and the state of the flocculant calculated by the image processing unit.

[0008] Further, the water treatment method of the present invention comprises: A process of calculating an amount of coagulant to be added to water stored in a water tank into which the water to be treated flows, based on the water quality of the water to be treated measured by a water quality meter; A process of calculating the state of the flocculants based on an image captured by an imaging device that captures images of the flocculants in the water to which the flocculant has been added; A process of controlling the amount of the flocculant to be added is performed based on the calculated amount to be added and the calculated state of the flocculant.

[0009] The program of the present invention also includes: A program to be executed by a computer, A step of calculating an amount of coagulant to be added to water stored in a water tank into which the water to be treated flows, based on the water quality of the water to be treated measured by a water quality meter; a step of calculating a state of the flocculant based on an image captured by an imaging device that captures an image of the flocculant in the water to which the flocculant has been added; and a procedure of controlling the amount of the flocculant to be added based on the calculated amount and the calculated state of the flocculant. [Effects of the Invention]

[0010] In the present invention, an optimum amount of flocculant can be added. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram showing an embodiment of a water treatment system of the present invention. [Figure 2] 2 is a diagram illustrating an example of an internal configuration of a control device illustrated in FIG. 1. FIG. [Figure 3] 3 is a diagram showing an example of the change over time in the amount of flocculant added controlled by the control unit shown in FIG. 2. FIG. [Figure 4] 2 is a flowchart illustrating an example of a water treatment method in the water treatment system shown in FIG. [Figure 5] 10 is a flowchart illustrating another example of a water treatment method in the water treatment system shown in FIG. [Figure 6] FIG. 1 is a diagram showing a first application example of a water treatment system according to the present invention. [Figure 7] FIG. 10 is a diagram showing a second application example of the water treatment system of the present invention. [Figure 8] FIG. 10 is a diagram showing a third application example of the water treatment system of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0013] Fig. 1 is a diagram showing one embodiment of a water treatment system of the present invention. As shown in Fig. 1, the water treatment system in this embodiment includes a water tank 100, an addition device 200, a flocculant storage tank 210, a water quality meter 300, an imaging device 400, and a control device 500.

[0014] The water tank 100 is a storage tank into which raw water to be treated flows and stores the inflowing water to be treated. The water tank 100 has a predetermined capacity. The dosing device 200 adds a flocculant stored in a flocculant storage tank 210 to the water stored in the water tank 100. The dosing device 200 adds an amount of flocculant from the flocculant storage tank 210 to the water stored in the water tank 100 based on instructions from the control device 500. The water quality meter 300 continuously measures the water quality of the water to be treated flowing into the water tank. The water quality meter 300 may be a COD (Chemical Oxygen Demand) meter, an ultraviolet absorbance meter, or the like, but is preferably a turbidity meter or an SS (Suspended Solids) meter. The water quality meter 300 outputs the measured value to the control device 500. The imaging device 400 captures an image of flocculants (flocs) in the water stored in the water tank 100 to which the flocculant has been added from the addition device 200. The imaging device 400 may be, for example, a non-wetted image sensor (camera) that captures an image of the water. The imaging device 400 is preferably an infrared sensor. The imaging device 400 may also be a camera that captures images of the water in the water tank 100 at intervals equal to or shorter than a preset time interval (for example, a video camera that continuously captures images). The imaging device 400 outputs image data representing the captured image to the control device 500. The control device 500 controls the amount of flocculant added by the addition device 200 from the flocculant storage tank 210 based on the water quality value measured by the water quality meter 300 and the state of the flocculants captured by the imaging device 400.

[0015] Fig. 2 is a diagram showing an example of the internal configuration of the control device 500 shown in Fig. 1. As shown in Fig. 2, the control device 500 shown in Fig. 1 has a calculation unit 510, an image processing unit 520, and a control unit 530. Note that Fig. 2 shows only the main components related to this embodiment among the components of the control device 500 shown in Fig. 1.

[0016] The calculation unit 510 calculates the amount to be added according to the water quality value output from the water quality meter 300. The calculation unit 510 notifies the control unit 530 of the calculated amount to be added. For example, the calculation unit 510 may calculate the amount to be added according to the water quality using a correspondence that has been previously established between the water quality and the amount to be added, or may calculate the amount to be added according to the water quality using a formula that has been generated in advance.

[0017] The image processing unit 520 calculates the feature amount of the aggregates included in the image represented by the image data output from the imaging device 400 as the state of the aggregates. The image processing unit 520 may detect pixels in the image represented by the image data output from the imaging device 400 where the color difference (e.g., the difference between RGB values) between adjacent pixels is equal to or greater than a threshold, and calculate the edge pixel, which is the sum of the number of detected pixels per unit area (image capture range), as the feature amount of the aggregates. The image processing unit 520 notifies the control unit 530 of the calculated state (feature amount) of the aggregates. Note that the image processing unit 520 may use a trained model that inputs the image data output from the imaging device 400 and outputs the feature amount of the aggregates included in the image represented by the image data, the required amount of flocculant to be added, the timing of adding aggregating agent, etc., and notify the control unit 530 of information acquired (inferred) from the trained model.

[0018] The control unit 530 controls the amount of flocculant added by the adding device 200 from the flocculant storage tank 210 based on the amount calculated by the calculation unit 510 and the state of the flocculants calculated by the image processing unit 520. Specifically, the control unit 530 first controls the adding device 200 to add the amount of flocculant calculated by the calculation unit 510 from the flocculant storage tank 210. Thereafter, the control unit 530 controls the adding device 200 to change the amount of flocculant added from the flocculant storage tank 210 each time a preset second time (second specified time) elapses, based on the state of the flocculants calculated by the image processing unit 520. After the second time elapses, the control unit 530 controls the adding device 200 to add the amount of flocculant calculated by the calculation unit 510 from the flocculant storage tank 210 each time a preset first time (first specified time) elapses, based on the water quality value output from the water quality meter 300 at that time. The first time period is longer than the second time period. For example, First time = Second time × n (n is a natural number greater than or equal to 2) It may be.

[0019] Furthermore, the control unit 530 determines whether the amount of change per unit time in the amount of addition calculated by the calculation unit 510 exceeds a predetermined threshold. If the amount of change in the amount of addition calculated by the calculation unit 510 exceeds the predetermined threshold, the control unit 530 controls the addition device 200 to add the amount of flocculant calculated by the calculation unit 510 at that time from the flocculant storage tank 210, regardless of whether the first time period or the second time period has passed. This makes it possible to respond to sudden changes in the water quality value output from the water quality meter 300.

[0020] As described above, when the image processing unit 520 acquires the features of the flocculants contained in the image, the amount of flocculant to be added, and the timing of addition from the trained model, the control unit 530 may control the addition of flocculant added by the addition device 200 from the flocculant storage tank 210 based on the information acquired by the image processing unit 520 from the trained model.

[0021] When image processing unit 520 calculates the feature amount of an aggregate contained in an image represented by image data output from imaging device 400 as the state of the aggregate, control unit 530 uses the feature amount calculated by image processing unit 520 as the state of the aggregate. Furthermore, the second time period is, for example, 5 minutes, and the first time period is, for example, 30 minutes. Control unit 530 includes two timers that measure the second time period and the first time period, respectively, and each timer is reset when it reaches the second time period and the first time period, respectively.

[0022] FIG. 3 is a diagram showing an example of the temporal change in the amount of flocculant added controlled by the control unit 530 shown in FIG. 2. In the example shown in FIG. 3, the adding device 200 is controlled so that, at the start of flocculant addition, the adding device 200 adds the amount of flocculant calculated by the calculation unit 510 according to the turbidity A measured by the water quality meter 300. Thereafter, the adding device 200 adds the amount of flocculant calculated by the calculation unit 510 according to the turbidity A until the second time period is reached. After the second time period has elapsed, the control unit 530 changes the amount of flocculant added from the flocculant storage tank 210 based on the state (feature amount) of the flocculant included in the image represented by the image data output from the imaging device 400, calculated by the image processing unit 520. At this time, the control unit 530 compares the feature amount of the flocculant included in the image represented by the image data output from the imaging device 400 calculated by the image processing unit 520 at the start of flocculant addition with the feature amount of the flocculant included in the image represented by the image data output from the imaging device 400, calculated by the image processing unit 520 after the second time period has elapsed. If the comparison result indicates that the difference between the two (the amount of change in the characteristic quantities) exceeds a predetermined threshold, the control unit 530 increases the amount of flocculant added from the flocculant storage tank 210. On the other hand, if the comparison result indicates that the difference between the two (the amount of change in the characteristic quantities) is equal to or less than the predetermined threshold, the control unit 530 decreases the amount of flocculant added from the flocculant storage tank 210. The increase amount (increase width) and decrease amount (decrease width) are preset amounts. In the example shown in FIG. 3, when the second time period has elapsed, the amount of change in the characteristic quantities exceeds the threshold, so the control unit 530 increases the amount of flocculant added from the flocculant storage tank 210. Thereafter, the control device 500 repeats the above comparison and amount change process every second specified time until the first time period is reached.

[0023] When the first time has elapsed, the control unit 530 controls the addition device 200 to add the amount of flocculant calculated by the calculation unit 510 in accordance with the water quality value output from the water quality meter 300 at that time from the flocculant storage tank 210. In the example shown in FIG. 3, the control unit 530 controls the addition device 200 to add the amount of flocculant calculated by the calculation unit 510 in accordance with the turbidity B measured by the water quality meter 300 at this time from the flocculant storage tank 210. Thereafter, the same processing as that performed until the first time is reached is repeated until the next time the first time is reached.

[0024] A description will now be given of a water treatment method in the water treatment system shown in Fig. 1. Fig. 4 is a flowchart illustrating an example of a water treatment method in the water treatment system shown in Fig. 1.

[0025] First, the calculation unit 510 calculates the amount of flocculant to be added according to the water quality value output from the water quality meter 300 (step S1). The control unit 530 controls the addition device 200 to add the amount of flocculant to be added calculated by the calculation unit 510 from the flocculant storage tank 210 to the water tank 100 (step S2). Thereafter, the image processing unit 520 detects pixels in the image represented by the image data output from the imaging device 400, where the color difference between adjacent pixels is equal to or greater than a threshold, and calculates the edge pixel count, which is the sum of the number of detected pixels per unit area (imaging range) (step S3). The control unit 530 then determines whether the amount of flocculant added by the addition device 200 from the flocculant storage tank 210 needs to be changed (step S4). Specifically, the control unit 530 compares the characteristic quantities of the flocculant calculated by the image processing unit 520 based on the image shown in the image data output from the imaging device 400 at the time when the addition of the flocculant began with the characteristic quantities of the flocculant calculated by the image processing unit 520 based on the image shown in the image data output from the imaging device 400 after the second specified time has elapsed, and based on the results of the comparison, determines whether the amount of flocculant being added by the addition device 200 from the flocculant storage tank 210 needs to be changed.

[0026] If the amount of flocculant being added by the addition device 200 from the flocculant storage tank 210 needs to be changed, the control unit 530 changes the amount of flocculant being added by the addition device 200 from the flocculant storage tank 210 (step S5). The change in the amount of addition is as described above. The control unit 530 controls the addition device 200 to add the changed amount of flocculant from the flocculant storage tank 210 to the water tank 100 (step S6). Thereafter, the control unit 530 determines whether a first specified time has elapsed (step S7). If the amount of flocculant being added by the addition device 200 from the flocculant storage tank 210 does not need to be changed in step S4, the processes of steps S5 and S6 are not performed, and the process of step S7 is performed.

[0027] If it is determined in step S7 that the first specified time has not elapsed, the process of step S3 is performed. On the other hand, if it is determined in step S7 that the first specified time has elapsed, the process of step S1 is performed.

[0028] FIG. 5 is a flowchart illustrating another example of the water treatment method in the water treatment system shown in FIG.

[0029] First, the calculation unit 510 calculates the amount of flocculant to be added according to the water quality value output from the water quality meter 300 (step S11). The control unit 530 controls the addition device 200 to add the amount of flocculant calculated by the calculation unit 510 from the flocculant storage tank 210 to the water tank 100 (step S12). Thereafter, the control unit 530 determines whether a second specified time has elapsed (step S13). The amount of flocculant to be added calculated by the calculation unit 510 in step S11 is added from the flocculant storage tank 210 to the water tank 100 until the second specified time has elapsed. After the second specified time has elapsed, the image processing unit 520 detects pixels in the image represented by the image data output from the imaging device 400 whose color difference is equal to or greater than a threshold, and calculates edge pixels, which is the sum of the number of detected pixels per unit area (imaging range) (step S14). Then, the control unit 530 determines whether or not the amount of flocculant being added by the adding device 200 from the flocculant storage tank 210 needs to be changed (step S15). Specifically, the control unit 530 compares the feature amount of the flocculant calculated by the image processing unit 520 based on the image represented by the image data output from the imaging device 400 at the time when the addition of the flocculant started with the feature amount of the flocculant calculated by the image processing unit 520 based on the image represented by the image data output from the imaging device 400 after the second specified time has elapsed, and determines whether or not the amount of flocculant being added by the adding device 200 from the flocculant storage tank 210 needs to be changed based on the result of the comparison.

[0030] If the amount of flocculant being added by the addition device 200 from the flocculant storage tank 210 needs to be changed, the control unit 530 changes the amount of flocculant being added by the addition device 200 from the flocculant storage tank 210 (step S16). The change in the amount of addition is as described above. The control unit 530 controls the addition device 200 to add the changed amount of flocculant from the flocculant storage tank 210 to the water tank 100 (step S17). Thereafter, the control unit 530 determines whether a first specified time has elapsed (step S18). If the amount of flocculant being added by the addition device 200 from the flocculant storage tank 210 does not need to be changed in step S15, the processes of steps S16 and S17 are not performed, and the process of step S18 is performed.

[0031] If it is determined in step S18 that the first specified time has not elapsed, the control unit 530 further determines whether or not the second specified time has elapsed (step S19). On the other hand, if it is determined in step S18 that the first specified time has elapsed, the process of step S11 is performed.

[0032] If it is determined in step S19 that the second specified time has not elapsed, the process proceeds to step S18. On the other hand, if it is determined in step S19 that the second specified time has elapsed, the process proceeds to step S14.

[0033] In the above-described embodiment, the water to be treated may contain suspended solids or substances to be insolubilized. The flocculant added from the flocculant storage tank 210 may be an inorganic flocculant, an organic coagulant, or a polymer (polymer flocculant). When the flocculant added from the flocculant storage tank 210 is an inorganic flocculant, the flocculant may be aluminum-based (PAC, aluminum sulfate, etc.), iron-based (polyferric chloride, ferric chloride), or the like, and is not particularly limited. When the flocculant added from the flocculant storage tank 210 is a polymer, the flocculant may be cationic or anionic.

[0034] In this manner, in this embodiment, the amount of flocculant added to the water being treated is controlled based on the water quality measured by the water quality meter and the state of flocculants in the water being treated when the flocculant is added. The state of flocculants is calculated based on images captured by an imaging device, and the amount of flocculant added, calculated based on the water quality of the water being treated, is then adjusted according to the state of the flocculants. This allows for the optimal amount of flocculant to be added. Controlling the amount of flocculant added solely based on the water quality measured by the water quality meter would be insufficient to handle cases where more flocculant than expected is required, even if the target water has the same turbidity. In contrast, this embodiment also controls the amount of flocculant added based on edge pixels calculated from the captured image. This allows for adjustment of the amount of flocculant added based on the water quality measured by the water quality meter. Furthermore, if the water quality meter value changes suddenly and significantly, the amount of flocculant added is prioritized and changed to the amount controlled according to the water quality measured by the water quality meter. This allows for response even to sudden fluctuations in raw water quality. (First application example)

[0035] Figure 6 is a diagram showing a first application example of the water treatment system of the present invention. As shown in Figure 6, this application example has a reaction tank 110, a coagulation tank 120, a settling tank 130, an addition device 200, an inorganic coagulant storage tank 211, a water quality meter 300, an imaging device 400, and a control device 500. The addition device 200, the water quality meter 300, the imaging device 400, and the control device 500 are each the same as those in the embodiment shown in Figure 1.

[0036] The reaction tank 110 and the coagulation tank 120 are separate versions of the water tank 100 in the embodiment shown in FIG. 1 . The reaction tank 110 and the coagulation tank 120 each have a predetermined capacity. The reaction tank 110 is a tank in which the water to be treated is stored and to which an inorganic coagulant is added from an addition device 200. The inorganic coagulant added may be the same as the inorganic coagulant added to the water tank 100 in the embodiment shown in FIG. 1 . The reaction tank 110 is also equipped with a pH meter, and a pH adjuster is added according to the value measured by the pH meter. The imaging device 400 captures images of the coagulants in the water stored in the reaction tank 110 and transmits image data representing the captured images to the control device 500. Because the amount of coagulant added is controlled based on the images captured by the imaging device 400, it is preferable that the imaging device 400 capture images of the coagulants in the water stored in the reaction tank 110 in order to minimize time lag. The dosing device 200 adds an amount of inorganic flocculant based on instructions from the control device 500 from the inorganic flocculant storage tank 211 to the reaction tank 110. The control method in the control device 500 is the same as the method described in the embodiment shown in Figure 1. The flocculation tank 120 is a tank into which the water treated in the reaction tank 110 is poured. A polymer, for example, is poured into the water stored in the flocculation tank 120. The water treated in the flocculation tank 120 is poured into the settling tank 130. In the settling tank 130, the treated water is separated from the settled sediment, and the sediment is discharged outside the settling tank 130 using a pump. (Second application example)

[0037] Figure 7 is a diagram showing a second application example of the water treatment system of the present invention. As shown in Figure 7, this application example includes a reaction tank 110, a coagulation tank 120, a settling tank 130, an addition device 200, an inorganic coagulant storage tank 211, a water quality meter 300, an imaging device 400, and a control device 500. Each of these components is the same as those in the application example shown in Figure 6. The difference from the application example shown in Figure 6 is that the imaging device 400 captures an image of coagulation in the water stored in the coagulation tank 120. (Third application example)

[0038] FIG. 8 is a diagram showing a third application example of the water treatment system of the present invention. As shown in FIG. 8, this application example includes a reaction tank 110, a coagulation tank 120, a settling tank 130, an addition device 200, a polymer storage tank 212, a water quality meter 300, an imaging device 400, and a control device 500. The components of the reaction tank 110, the coagulation tank 120, the settling tank 130, the addition device 200, the water quality meter 300, the imaging device 400, and the control device 500 are the same as those in the application example shown in FIG. 6. The imaging device 400 captures images of coagulation in the water stored in the coagulation tank 120. The addition device 200 adds the polymer in the polymer storage tank 212 to the coagulation tank 120 based on instructions from the control device 500. An inorganic coagulant is added to the reaction tank 110.

[0039] In the first to third application examples described above, the description has been given of devices equipped with a settling tank for performing coagulation and sedimentation, but any device that includes coagulation may be used. For example, the present invention can also be applied to coagulation pressure flotation, coagulation filtration, etc. Furthermore, each of the reaction tank 110 and the coagulation tank 120 may be provided with an agitator that agitates the treated water stored therein.

[0040] Although the above description has been given by allocating each function (process) to each component, this allocation is not limited to the above. Furthermore, the configuration of the components is also not limited to the above-described form, which is merely an example.

[0041] The processing performed by the control device 500 described above may be performed by a logic circuit individually designed for each purpose. Alternatively, a computer program (hereinafter referred to as the program), which describes the processing procedures, may be recorded on a recording medium readable by the control device 500, and the program recorded on the recording medium may be read and executed by the control device 500. Examples of recording media readable by the control device 500 include removable recording media such as floppy disks, magneto-optical disks, digital versatile discs (DVDs), compact discs (CDs), Blu-ray discs (registered trademark), and universal serial bus (USB) memories, as well as memories such as read-only memory (ROM) and random access memory (RAM) built into the control device 500, and hard disc drives (HDDs). The program recorded on the recording medium is read by a CPU provided in the control device 500, and the same processing as described above is performed under the control of the CPU. Here, the CPU operates as a computer that executes the program read from the recording medium on which the program is recorded. [Explanation of symbols]

[0042] 100 aquariums 110 Reaction Tank 120 Coagulation tank 130 Sedimentation tank 200 Addition equipment 210 Coagulant storage tank 211 Inorganic coagulant storage tank 212 Polymer storage tank 300 water quality meter 400 Imaging device 500 control device 510 Calculation Unit 520 Image Processing Unit 530 Control Unit

Claims

1. a water tank into which the water to be treated flows; an adding device that adds a flocculant to the water stored in the water tank; a water quality meter for measuring the quality of the water to be treated flowing into the water tank; an imaging device that images the state of the flocculant in the water to which the flocculant has been added from the adding device; a control device that controls the amount of flocculant added by the addition device based on the water quality measured by the water quality meter and the state of the flocculant imaged by the imaging device; The control device calculates the amount of addition based on the water quality measured by the water quality meter every first time period, controls the addition of the calculated amount of coagulant from the addition device, and increases or decreases the amount of addition based on the state of the coagulant imaged by the imaging device every time a second time period shorter than the first time period elapses during the first time period.

2. 2. The water treatment system according to claim 1, The control device determines whether the change in the amount of addition per unit time according to the water quality measured by the water quality meter exceeds a predetermined threshold, and if the change in the amount of addition per unit time according to the water quality measured by the water quality meter exceeds the predetermined threshold, controls the addition device to add the amount of coagulant calculated according to the water quality measured by the water quality meter at that time.

3. The water treatment system according to claim 1 or 2, The control device compares the change in the characteristic quantity representing the state of the flocculant imaged by the imaging device with a predetermined threshold value each time the second time period elapses, and controls the amount of flocculant to be added based on the results of the comparison.

4. The water treatment system according to any one of claims 1 to 3, The water treatment system, wherein the water quality meter is a turbidity meter or a suspended solids (SS) meter.

5. 4. The water treatment system according to claim 3, The water treatment system, wherein the feature amount is an edge pixel.

6. a calculation unit that calculates an amount of flocculant to be added to water stored in a water tank into which the water to be treated flows, based on the water quality of the water to be treated measured by the water quality meter; an image processing unit that calculates the state of the flocculants based on an image captured by an imaging device that captures images of the flocculants in the water to which the flocculant has been added; a control unit that controls the amount of the flocculant to be added based on the amount calculated by the calculation unit and the state of the flocculant calculated by the image processing unit, the calculation unit calculates the amount of addition according to the water quality measured by the water quality meter for each first time period; The control unit controls the addition of the amount of flocculant calculated by the calculation unit from an addition device that adds flocculant to the water stored in the water tank, and increases or decreases the addition amount based on the state of the flocculant calculated by the image processing unit each time a second time shorter than the first time elapses during the first time.

7. A process for calculating, at each first time interval, the amount of coagulant to be added to the water stored in the tank into which the treated water flows, based on the water quality of the treated water measured by the water quality meter; A process of calculating the state of the flocculants based on an image captured by an imaging device that captures images of the flocculants in the water to which the flocculant has been added; a process of controlling the addition of the calculated amount of flocculant from an addition device that adds flocculant to the water stored in the water tank; A water treatment method in which, during the first time period, each time a second time period shorter than the first time period elapses, the amount of addition is increased or decreased based on the calculated state of the flocculation.

8. On the computer, a step of calculating, for each first time period, an amount of coagulant to be added to water stored in a water tank into which the water to be treated flows, based on the water quality of the water to be treated measured by a water quality meter; a step of calculating a state of the flocculant based on an image captured by an imaging device that captures an image of the flocculant in the water to which the flocculant has been added; a step of controlling the addition of the calculated amount of flocculant from an addition device that adds flocculant to the water stored in the water tank; and a program for executing a procedure of increasing or decreasing the amount of addition based on the calculated state of the agglomerate each time a second time shorter than the first time elapses during the first time period.

Images