JP2020195949A - Water treatment device, water treatment method, and abnormality diagnosis device and diagnosis method for floating separation device - Google Patents

Abstract

To provide a water treatment device, a water treatment method, and an abnormality diagnosis device and a diagnosis method for a floating separation device, which can quickly respond to abnormalities in a treated water quality in a coagulation treatment that separates solid and liquid by a pressurized flotation method.SOLUTION: There is provided a water treatment device 1 including: a coagulation reaction device 12 for injecting a coagulant into water to be treated to coagulate suspended substances to form floc; a floating separation device 14 for making bubbles adhere to the floc and separating them by floating; a treatment water quality measuring device 40 for measuring a water quality of the treatment water in the floating separation device 14; at least one of a first imaging device 36 for photographing the treatment water in the coagulation reaction device 12 and a second imaging device 38 for photographing an upper part of a floating tank 18 of the floating separation device 14; and determination means for determining a cause of deterioration of the treatment water quality based on an image photographed by at least one of the first imaging device 36 and the second imaging device 38 when the treatment water quality measured by the treatment water quality measuring device 40 deteriorates.SELECTED DRAWING: Figure 1

Description

The present invention relates to a water treatment device for performing levitation separation, a water treatment method, an abnormality diagnostic device for the levitation separation device, and a diagnostic method.

In water treatment such as water treatment and wastewater treatment, for example, an inorganic or organic coagulant is injected into the water to be treated to coagulate suspended substances and dissolved substances contained in the water to be treated. Flocks are formed and solid-liquid separation is performed.

In such a coagulation treatment, the turbidity of the treated water may be measured to control the injection amount of the coagulant (see, for example, Patent Document 1).

As a method of solid-liquid separation in agglomeration treatment, a pressurized flotation method in which water in which gas is pressurized and dissolved (pressurized water) is injected from the lower part of a floating tank to generate bubbles, and bubbles are attached to flocs to perform floating separation. There is. There are two main causes for the deterioration of treated water quality in the pressurized flotation method.
1. 1. The water quality of the water to be treated fluctuates, which deviates from the optimum injection conditions for the flocculant.
2. 2. Some trouble occurred in the gas dissolving device that generates the pressurized water of the pressurized flotation device, and the pressurized water was not generated.

However, in the method of measuring the turbidity of the treated water and controlling the injection amount of the flocculant, such as the method described in Patent Document 1, it is determined whether the cause of the deterioration of the treated water quality is due to either 1 or 2 above. There is a problem that it cannot be discriminated and it may not be possible to respond to an abnormality in the treated water quality of the pressurized flotation device at an early stage.

Japanese Unexamined Patent Publication No. 7-204412

An object of the present invention is to provide a water treatment device, a water treatment method, an abnormality diagnosis device for a levitation separation device, and a diagnostic method capable of promptly responding to an abnormality in the treated water quality of a coagulation treatment for solid-liquid separation by a pressurized flotation method. To provide.

The present invention is a coagulation reaction device for injecting a coagulant into water to be treated to coagulate suspended substances to form flocs; and a levitation separation device for adhering bubbles to the flocs to levitate and separate them; A treated water quality measuring means for measuring the quality of the treated water of the floating separation device; a first photographing means for photographing the treated water of the agglomeration reaction device, and an upper portion of the floating separation tank of the floating separation device. With at least one of the second photographing means for the purpose; when the water quality of the treated water measured by the treated water quality measuring means deteriorates, an image is taken by at least one of the first photographing means and the second photographing means. It is a water treatment apparatus including a determination means for determining the cause of deterioration of the water quality of the treated water based on the obtained image; and an output means for outputting the result determined by the determination means.

In the water treatment apparatus, the determination means is based on at least one of the number of particles, the particle size distribution, the number of edges, the RGB ratio, and the amount of movement based on the image taken by the first photographing means. It is preferable to determine the cause of deterioration of the quality of treated water.

In the water treatment apparatus, it is preferable that the determination means determines the cause of deterioration of the water quality of the treated water based on the bubble formation state based on the image taken by the second photographing means.

The water treatment apparatus further includes a water quality measuring means for measuring the water quality of the water to be treated, and the determination means is measured by the water quality measuring means to be treated when the water quality of the treated water deteriorates. Based on the water quality of the water to be treated, the water quality of the treated water measured by the treated water quality measuring means, and the image taken by at least one of the first photographing means and the second photographing means. , It is preferable to determine the cause of deterioration of the water quality of the treated water.

In the water treatment apparatus, the determination means is based on the SS concentration of the water to be treated measured by the water quality measuring means to be treated and the SS concentration of the treated water measured by the water quality measuring means [(treated). Based on the SS removal rate calculated as [water SS concentration-treated water SS concentration) / treated water SS concentration] and the image taken by at least one of the first photographing means and the second photographing means. Therefore, it is preferable to determine the cause of deterioration of the water quality of the treated water.

The present invention includes a coagulation reaction step of injecting a coagulant into water to be treated to agglomerate suspended substances to form flocs; a levitation separation step of adhering bubbles to the flocs and levitation separation, and the levitation separation step. Of the treated water quality measuring step of measuring the water quality of the treated water, the first photographing step of photographing the water to be treated in the aggregation reaction step, and the second photographing step of photographing the upper part of the floating separation tank in the floating separation step. With at least one; when the water quality of the treated water measured by the treated water quality measuring step deteriorates, the said, based on the image taken by at least one of the first photographing step and the second photographing step. It is a water treatment method including a determination step of determining the cause of deterioration of the quality of treated water; and an output step of outputting the result determined in the determination step.

In the determination step in the water treatment method, the treatment is based on at least one of the number of particles, the particle size distribution, the number of edges, the RGB ratio, and the amount of movement based on the image taken by the first photographing step. It is preferable to determine the cause of deterioration of water quality.

In the determination step in the water treatment method, it is preferable to determine the cause of deterioration of the water quality of the treated water based on the bubble formation state based on the image captured by the second photographing step.

The water treatment method further includes a water quality measurement step for measuring the water quality of the water to be treated, and when the water quality of the treated water deteriorates in the determination step, the water quality is measured by the water quality measurement step. Based on the water quality of the water to be treated, the water quality of the treated water measured by the treated water quality measuring step, and the image taken by at least one of the first photographing step and the second photographing step. , It is preferable to determine the cause of deterioration of the water quality of the treated water.

In the determination step in the water treatment method, from the SS concentration of the water to be treated measured by the water quality measurement step and the SS concentration of the treated water measured by the water quality measurement step [(water to be treated). Based on the SS removal rate calculated as SS concentration-treated water SS concentration) / treated water SS concentration] and the image taken by at least one of the first photographing step and the second photographing step. , It is preferable to determine the cause of deterioration of the water quality of the treated water.

The present invention provides a first photographing means for photographing the water to be treated of a coagulation reaction device for injecting a flocculant into the water to be treated to aggregate suspended substances to form flocs, and bubbles in the flocs. At least one of the second photographing means for photographing the upper part of the levitation separation tank of the levitation separation device for adhering and separating the levitation; and the treated water quality measuring means for measuring the water quality of the treated water of the levitation separation device. When the water quality of the treated water deteriorated as measured by the treated water quality measuring means, the treated water is based on an image taken by at least one of the first photographing means and the second photographing means. It is an abnormality diagnosis device of a levitation separation device including a determination means for determining the cause of deterioration of water quality; and an output means for outputting the result determined by the determination means.

The present invention includes a first imaging step of photographing the water to be treated in a coagulation reaction step of injecting a flocculant into the water to be treated to aggregate suspended substances to form flocs, and adhering bubbles to the flocs. At least one of the second imaging steps of photographing the upper part of the levitation separation tank in the levitation separation step for levitation separation; a treated water quality measuring step for measuring the water quality of the treated water in the levitation separation step; and a measurement by the treated water quality measuring step. When the quality of the treated water deteriorates, the cause of the deterioration of the quality of the treated water is determined based on the images taken by at least one of the first photographing step and the second photographing step. It is an abnormality diagnosis method of a levitation separation apparatus including a determination step; an output step of outputting the result determined in the determination step;

INDUSTRIAL APPLICABILITY The present invention provides a water treatment apparatus, a water treatment method, an abnormality diagnostic apparatus for a levitation separation apparatus, and a diagnostic method capable of promptly responding to an abnormality in the treated water quality of a coagulation treatment for solid-liquid separation by a pressurized flotation method. be able to.

It is a schematic block diagram which shows an example of the water treatment apparatus which concerns on embodiment of this invention. It is a flowchart which shows an example of the control in Embodiment 1. It is a flowchart which shows an example of control in Embodiment 2. It is a flowchart which shows an example of control in Embodiment 3. It is a flowchart which shows an example of control in Embodiment 4.

Embodiments of the present invention will be described below. The present embodiment is an example of carrying out the present invention, and the present invention is not limited to the present embodiment.

An outline of an example of a water treatment apparatus according to an embodiment of the present invention is shown in FIG. 1, and its configuration will be described.

The water treatment device 1 shown in FIG. 1 is an agglutination reaction device 12 for injecting a coagulant into water to be treated to coagulate suspended substances to form flocs, and a flocculation reaction device 12 for adhering bubbles to the flocs to float and separate them. The floating separation device 14 is provided. The agglutination reaction device 12 includes, for example, a reaction tank 16, and the levitation separation device 14 includes, for example, a levitation tank 18 and a water intake unit 20. The water treatment device 1 is a treated water quality measuring device 40 as a treated water quality measuring means for measuring the water quality of the treated water of the levitation separation device 14, and a first photographing means for photographing the treated water of the coagulation reaction device 12. The photographing device 36 and at least one of the second photographing devices 38 are provided as the second photographing means for photographing the upper part of the levitation tank 18 of the levitation separation device 14. The water treatment device 1 may include a water tank 10 to be treated for storing the water to be treated and a water tank 22 for storing the treated water.

In the water treatment device 1 of FIG. 1, a water treatment pipe 24 is connected to the water treatment inlet of the water tank 10 to be treated. The water outlet to be treated of the water tank 10 to be treated and the water inlet of the reaction tank 16 of the agglutination reaction device 12 are connected by a water pipe 26 to be treated. The reaction tank 16 of the agglutination reaction device 12 and the levitation tank 18 of the levitation separation device 14 are connected so that the agglutination reaction liquid can continuously flow from the reaction tank 16 to the levitation tank 18. The treated water outlet of the water intake unit 20 of the levitation separation device 14 and the treated water inlet of the treated water tank 22 are connected by a treated water pipe 28. A coagulant injection pipe 30 is connected to the reaction tank 16 as a coagulant injection means for injecting the coagulant. In the reaction tank 16, a stirring device 32 which is a stirring means having a rotation driving means such as a motor and a stirring blade and the like is installed.

A first photographing device 36 for photographing the water to be treated in the reaction tank 16 is installed above, for example, the reaction tank 16 of the agglutination reaction device 12, and above, for example, the floating tank 18 of the floating separation device 14 A second photographing device 38 for photographing the upper part of the levitation tank 18 is installed. A treated water quality measuring device 40 for measuring the water quality of the treated water of the floating separation device 14 is installed in the water intake unit 20 of the floating separation device 14. In the water tank 10 to be treated, a water quality measuring device 34 to be treated may be installed as a water quality measuring means for measuring the water quality of the water to be treated. The water treatment device 1 is based on an image taken by at least one of the first photographing device 36 and the second photographing device 38 when the water quality of the treated water measured by the treated water quality measuring device 40 deteriorates. A control unit 42 is provided as a determination means for determining the cause of deterioration of the water quality of the treated water and an output means for outputting the determined result. The control unit 42 is communicably connected to the water quality measuring device 34 to be treated, the first photographing device 36, the second photographing device 38, and the treated water quality measuring device 40, respectively, by electrical connection or the like.

In the water treatment device 1 of FIG. 1, the water to be treated is stored in the water tank 10 to be treated as needed through the water pipe 24 to be treated, and is sent to the reaction tank 16 of the agglutination reaction device 12 through the water pipe 26 to be treated. To. In the reaction tank 16, the coagulant is injected into the water to be treated through the coagulant injection pipe 30, and the mixture is stirred by the stirrer 32 to aggregate the suspended substances and the like contained in the water to be treated to form flocs (aggregation reaction). Process).

The agglutinating reaction solution containing the flocs is sent from the reaction tank 16 to the levitation tank 18 of the levitation separation device 14. In the levitation tank 18, air bubbles are attached to the flocs to perform levitation separation (floating separation step). For example, water in which gas is pressurized and dissolved (pressurized water) is injected from the lower part of the levitation tank 18 to generate bubbles, and the bubbles are attached to the flocs to perform levitation separation. The sludge that floats together with the air bubbles in the floating tank 18 and the treated water are separated by a known method, and the treated water flows into the water intake section 20 and is sent to the treated water tank 22 through the treated water pipe 28.

In the water treatment device 1, the first imaging device 36 observes the aggregation state and the like in the aggregation reaction step (first imaging step), and the second imaging device 38 observes the state of bubbles and the like in the floating separation step (second imaging). Step), the treated water quality measuring device 40 measures the water quality of the treated water such as the turbidity of the treated water and the suspension substance concentration (SS concentration) in the floating separation step (treated water quality measuring step). When the water quality of the treated water measured by the treated water quality measuring device 40 deteriorates, the control unit 42 processes the image based on the image taken by at least one of the first photographing device 36 and the second photographing device 38. The cause of deterioration of water quality is determined (judgment process), and the determined result is output (output process).

The water treatment device 1 is provided with, for example, an alarm system, and the control unit 42 is among the first photographing device 36 and the second photographing device 38 when the water quality of the treated water measured by the treated water quality measuring device 40 deteriorates. The feature amount is measured from the image taken by at least one and the image analysis result, the cause of the deterioration of the water quality of the treated water is judged based on the measured feature amount, and the judgment result is the aggregation reaction abnormality and the floating separation abnormality. It is possible to issue an alarm such as a coagulation reaction abnormality alarm or a floating separation abnormality alarm by operating the alarm system by outputting the water separately. As a result, it is possible to quickly respond to abnormalities in the treated water quality of the coagulation treatment that performs solid-liquid separation by the pressurized flotation method. The details of the abnormality diagnosis method of the levitation separator will be described below.

<Embodiment 1>
The first embodiment is an embodiment in which the treated water quality measuring device 40 and the first photographing means (first photographing device 36) are used. FIG. 2 shows a flowchart of an example of control in the first embodiment. For example, the control unit 42 outputs a treated water abnormality alarm when it is determined that the water quality of the treated water in the levitation separation step has deteriorated based on the treated water quality measured by the treated water quality measuring device 40 (S10) (S12). , The image taken by the first photographing apparatus 36 and the feature amount obtained from the image analysis result thereof are measured and referred to (S14). When the feature amount or the like based on the image taken by the first imaging device 36 is an abnormal value, the cause of the deterioration of the water quality of the treated water is determined to be an agglutination reaction abnormality, and an agglutination reaction abnormality alarm is output (S16). ), For example, the confirmation items when the agglutination reaction is abnormal are output to the operator of the water treatment device, for example, on a display or the like. After that, measures should be taken to deal with the deterioration of the quality of the treated water.

When the image taken by the first photographing device 36 and the feature amount obtained from the image analysis result are normal values, the control unit 42 determines that the cause of the deterioration of the water quality of the treated water is a floating separation abnormality. Then, a floating separation abnormality alarm is output (S18), and for example, a confirmation item at the time of a floating separation abnormality is output to the operator of the water treatment device, for example, on a display or the like. After that, measures should be taken to deal with the deterioration of the quality of the treated water.

Examples of the items to be confirmed when the agglutination reaction is abnormal include "failure of the agglutinating agent injection pump", "presence or absence of blockage of the agglutinating agent injection pipe", "variation of the optimum agglutination condition due to fluctuation of the water quality of the water to be treated" and the like.

Examples of the items to be confirmed when the floating separation is abnormal include "gas-liquid ratio", "gas dissolution pressure", and "blockage of excess air blow pipe".

It is desirable that these confirmation items are prioritized and output for confirmation based on the priority calculated from the past occurrence frequency and severity by the control unit 42.

When the injection amount of the agglutinant in the agglutination reaction step is controlled by the water quality of the treated water, it is desirable to prohibit the control of the injection amount of the agglutinant in the case of abnormal floating separation. This is to suppress overshoot and the like of coagulant injection.

Examples of the feature amount based on the image taken by the first photographing apparatus 36 include the number of flocs particles, the particle size distribution of flocs, the number of edges, the RGB ratio, the amount of movement, and the like.

The number of edges is obtained by detecting the difference in contrast of the captured image, detecting the outer circumference of the flock as an edge, and counting the number of pixels. The number of edges can be calculated using, for example, an image sensor (manufactured by KEYENCE, CV-5000) or the like.

The RGB ratio can be measured using, for example, a white spot photoelectric sensor (manufactured by KEYENCE, LR-W) or the like.

The amount of movement can be calculated by dividing the amount of movement of particles between frames by the time of the frame. For particle tracking, moving image analysis software or the like may be used, and examples thereof include DIPP-Images manufactured by Kato Koken.

<Embodiment 2>
The second embodiment is a case where the treated water quality measuring device 40 and the second photographing means (second photographing device 38) are used. FIG. 3 shows a flowchart of an example of control in the second embodiment. For example, the control unit 42 outputs a treated water abnormality alarm (S22) when it is determined that the water quality of the treated water in the floating separation step has deteriorated based on the treated water quality measured by the treated water quality measuring device 40 (S20). , The image taken by the second photographing apparatus 38 and the feature amount obtained from the image analysis result are measured and referred to (S24). When the feature amount or the like based on the image taken by the second photographing device 38 is an abnormal value, the cause of the deterioration of the water quality of the treated water is determined to be a floating separation abnormality, and a floating separation abnormality alarm is output (S26). ), For example, the operator of the water treatment device is output a confirmation item at the time of an abnormality in floating separation to, for example, a display. After that, measures should be taken to deal with the deterioration of the quality of the treated water.

When the image captured by the second imaging device 38 and the feature amount obtained from the image analysis result are normal values, the control unit 42 determines that the cause of the deterioration of the water quality of the treated water is an agglutination reaction abnormality. Then, an agglutination reaction abnormality alarm is output (S28), and for example, a confirmation item at the time of an agglutination reaction abnormality is output to the operator of the water treatment device, for example, on a display or the like. After that, measures should be taken to deal with the deterioration of the quality of the treated water.

As a feature amount based on the image taken by the second photographing apparatus 38, the presence or absence of bubbles measured from the photographed image by observing the bubbles on the upper liquid surface of the levitation tank 18, the number of bubbles, the bubble formation such as the bubble diameter, etc. The situation etc. can be mentioned. When the formation of bubbles is abnormal in the levitation separation step, it can be judged from the conditions such as "the number of bubbles is small" and "the diameter of the bubbles is large" as compared with the standard state.

<Embodiment 3>
The third embodiment is an embodiment when the treated water quality measuring device 40, the first photographing means (first photographing device 36), and the second photographing means (second photographing device 38) are used. FIG. 4 shows a flowchart of an example of control in the third embodiment. For example, the control unit 42 outputs a treated water abnormality alarm (S32) when it is determined that the water quality of the treated water in the floating separation step has deteriorated based on the treated water quality measured by the treated water quality measuring device 40 (S30). , The feature amount obtained from the image taken by the first photographing device 36 and the image analysis result thereof is measured and referred to (S34), and is obtained from the image taken by the second photographing device 38 and the image analysis result thereof. The feature amount and the like are measured and referred to (S35). When the feature amount or the like based on the image taken by the first imaging device 36 is an abnormal value, the cause of the deterioration of the water quality of the treated water is determined to be an agglutination reaction abnormality, and an agglutination reaction abnormality alarm is output (S37). ), For example, the confirmation items when the agglutination reaction is abnormal are output to the operator of the water treatment device, for example, on a display or the like. If the feature amount or the like based on the image taken by the second photographing device 38 is an abnormal value, the cause of the deterioration of the water quality of the treated water is determined to be a floating separation abnormality, and a floating separation abnormality alarm is output (S38). ), For example, the operator of the water treatment device is output a confirmation item at the time of an abnormality in floating separation to, for example, a display. After that, measures should be taken to deal with the deterioration of the quality of the treated water.

As a result, it becomes possible to accurately detect the case where the deterioration of aggregation and the trouble of the pressurized flotation device occur at the same time.

<Embodiment 4>
The fourth embodiment is an embodiment in which a water quality measuring means to be treated (water quality measuring device 34 to be treated) is used in addition to the respective configurations of the first to third embodiments. FIG. 5 shows a flowchart of an example of control in the fourth embodiment.

For example, when the control unit 42 determines that the water quality of the treated water in the levitation separation step has deteriorated based on the water quality to be treated and the treated water quality measured by the water quality measuring device 34 and the treated water quality measuring device 40 (S40). , The treated water abnormality alarm is output (S42), the feature amount obtained from the image taken by the first photographing device 36 and the image analysis result, and the image taken by the second photographing device 38 and the image analysis result thereof. At least one of the feature quantities and the like obtained from the above is measured and referred to (S44, S45). When the image, feature amount, etc. taken by the first photographing apparatus 36 are abnormal values, the cause of the deterioration of the water quality of the treated water is determined to be an agglutination reaction abnormality, and an agglutination reaction abnormality alarm is output (S47). For example, the confirmation items when the agglutination reaction is abnormal are output to the operator of the water treatment device, for example, on a display or the like. If the image, feature amount, etc. taken by the second photographing device 38 are abnormal values, the cause of the deterioration of the water quality of the treated water is determined to be a floating separation abnormality, and a floating separation abnormality alarm is output (S48). For example, the operator of the water treatment device is output a confirmation item at the time of an abnormality in floating separation to, for example, a display. After that, measures should be taken to deal with the deterioration of the quality of the treated water.

This makes it possible to accurately detect troubles caused by the water to be treated.

For example, the control unit 42 uses the SS concentration of the water to be treated measured by the water quality measuring device 34 to be treated and the SS concentration of the treated water measured by the water quality measuring device 40 [(SS concentration of water to be treated-treated water). A treated water abnormality alarm may be output when it is determined that the water quality of the treated water in the floating separation step has deteriorated based on the SS removal rate calculated as [SS concentration) / SS concentration of water to be treated]. ..

The methods of the first to fourth embodiments may be selected from the economical efficiency of the device, the severity at the time of trouble occurrence, and the like. The first embodiment is preferable to the second embodiment because the abnormality can be detected on the upstream side of the treatment.

In the water treatment apparatus, at least one of the first photographing means (first photographing device 36) and the second photographing means (second photographing device 38), the treated water quality measuring means (treated water quality measuring device 40), and the determining means. And the output means (control unit 42) functions as an abnormality diagnosis device of the levitation separation device.

Further, at least one of the first photographing step and the second photographing step in the water treatment method, the treated water quality measuring step, the determination step, and the output step are carried out as an abnormality diagnosis method of the levitation separation device.

The water quality measuring means and the treated water quality measuring means may be any one capable of measuring the water quality of the treated water or the treated water, and are not particularly limited. For example, an SS concentration measuring device and a chromaticity measuring device. , TOC measuring device, pH measuring device, conductivity measuring device and the like, and it is desirable to appropriately select according to the fluctuation tendency of the water to be treated. From the viewpoint of economy, the SS concentration measuring device and the pH measuring device are cheaper than the TOC measuring device, and therefore it is desirable to measure the water quality to be treated with these measuring devices.

As the first photographing means (first photographing device 36) and the second photographing means (second photographing device 38), the water to be treated of the agglutination reaction device can be photographed, or in the floating separation tank of the floating separation device. Anything that can shoot the upper part is not particularly limited, and examples thereof include a camera and a video camera. If the image of the camera is not clear, it is desirable to add a light source. The light source is not limited, but may be appropriately selected from white light, infrared light, and the like.

The output of the determined result may be performed as an alarm issuance by the alarm system, display on a display or the like, printing on paper or the like, or the like.

The agglutination reaction apparatus 12 may be any as long as it performs an agglutination reaction. Just do it.

The levitation separation device 14 may be any device that performs pressure levitation separation, and is not particularly limited, and a known configuration may be used.

The agglutinant used in the agglutination reaction step and the agglutination reaction apparatus may be any agglutinant that can be used in the agglutination treatment, and is not particularly limited. As the flocculant, at least one of an inorganic flocculant and a polymer flocculant is used.

Examples of the inorganic flocculant include iron-based inorganic flocculants such as ferric chloride and polyferric sulfate, and aluminum-based inorganic flocculants such as aluminum sulfate and polyaluminum chloride (PAC).

The amount of the inorganic flocculant added is, for example, in the range of 1 to 500 mg / L.

The polymer flocculant is not particularly limited, such as a nonionic polymer flocculant, an anionic polymer flocculant, or a cationic polymer flocculant, but for example, polyacrylamide, sodium polyacrylate, acrylamide, and the like. Examples thereof include acrylate copolymers, sodium acrylamide propane sulfonate, chitosan, dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate and polyamidine. The polymer flocculant may be used alone or in combination of two or more.

The amount of the polymer flocculant added is, for example, in the range of 0.1 to 5 mg / L.

The pH may be adjusted using a pH adjuster in the agglutination reaction step and the agglutination reaction apparatus. Examples of the pH adjuster include acids such as hydrochloric acid and sulfuric acid, and alkalis such as sodium hydroxide. The pH may be adjusted, for example, in the range of 4 to 11. The pH is measured, for example, by a pH meter, which is a pH measuring means installed in the reaction vessel 16.

The liquid temperature in the agglutination reaction is not particularly limited, and is, for example, in the range of 15 to 35 ° C. Since the separability changes depending on the viscosity and the like, it is desirable to adjust the liquid temperature so that it is as constant as possible.

The water to be treated is, for example, water containing a suspended substance or the like, and examples thereof include river water, industrial water, wastewater and the like.

1 Water treatment equipment, 10 treatment water tank, 12 coagulation reaction equipment, 14 levitation separation equipment, 16 reaction tank, 18 levitation tank, 20 intake section, 22 treatment water tank, 24, 26 treatment water pipe, 28 treatment water pipe, 30 Coagulant injection piping, 32 stirrer, 34 treated water quality measuring device, 36 first photographing device, 38 second photographing device, 40 treated water quality measuring device, 42 control unit.

Claims (12)

An agglutinating reaction device for injecting a coagulant into water to be treated to coagulate suspended substances to form flocs,
A levitation separation device for levitation separation by adhering air bubbles to the flocs,
A treated water quality measuring means for measuring the water quality of the treated water of the floating separation device,
At least one of a first photographing means for photographing the water to be treated of the agglutination reaction apparatus and a second photographing means for photographing the upper part of the floating separation tank of the floating separation apparatus.
When the water quality of the treated water deteriorates as measured by the treated water quality measuring means, the water quality of the treated water is based on an image taken by at least one of the first photographing means and the second photographing means. As a means of determining the cause of the deterioration of
An output means that outputs the result determined by the determination means, and
A water treatment device characterized by comprising. The water treatment apparatus according to claim 1.
The determination means deteriorates the water quality of the treated water based on at least one of the number of particles, the particle size distribution, the number of edges, the RGB ratio, and the amount of movement based on the image taken by the first photographing means. A water treatment device characterized by determining the cause of. The water treatment apparatus according to claim 1 or 2.
The water treatment apparatus is characterized in that the determination means determines the cause of deterioration of the water quality of the treated water based on the bubble formation state based on the image taken by the second photographing means. The water treatment apparatus according to any one of claims 1 to 3.
Further, it is provided with a water quality measuring means for measuring the water quality of the water to be treated.
The determination means includes, when the water quality of the treated water deteriorates, the water quality of the treated water measured by the treated water quality measuring means, the water quality of the treated water measured by the treated water quality measuring means, and the water quality of the treated water. A water treatment apparatus characterized in that the cause of deterioration of the water quality of the treated water is determined based on an image taken by at least one of the first photographing means and the second photographing means. The water treatment apparatus according to claim 4.
The determination means is based on the SS concentration of the water to be treated measured by the water quality measuring means to be treated and the SS concentration of the treated water measured by the water quality measuring means of the treated water [(SS concentration of water to be treated-treated water). SS concentration) / SS concentration of water to be treated], and the treated water based on the SS removal rate and the image taken by at least one of the first photographing means and the second photographing means. A water treatment device characterized by determining the cause of deterioration of water quality. An agglutination reaction step of injecting a coagulant into water to be treated to coagulate suspended substances to form flocs,
A levitation separation step in which bubbles are attached to the flocs and levitation separation is performed.
The treated water quality measuring step of measuring the water quality of the treated water in the floating separation step and
At least one of a first photographing step of photographing the water to be treated in the agglutination reaction step and a second photographing step of photographing the upper part of the floating separation tank in the floating separation step.
When the water quality of the treated water deteriorates measured by the treated water quality measuring step, the water quality of the treated water is based on the images taken by at least one of the first photographing step and the second photographing step. Judgment process to determine the cause of deterioration of
An output process that outputs the result determined in the determination process and
A water treatment method comprising. The water treatment method according to claim 6.
In the determination step, the deterioration of the water quality of the treated water is based on at least one of the number of particles, the particle size distribution, the number of edges, the RGB ratio, and the amount of movement based on the image taken by the first photographing step. A water treatment method characterized by determining the cause of. The water treatment method according to claim 6 or 7.
A water treatment method, characterized in that, in the determination step, the cause of deterioration of the water quality of the treated water is determined based on the bubble formation state based on the image captured by the second photographing step. The water treatment method according to any one of claims 6 to 8.
In addition, it includes a water quality measurement step for measuring the water quality of the water to be treated.
In the determination step, when the water quality of the treated water deteriorates, the water quality of the treated water measured by the treated water quality measuring step, the water quality of the treated water measured by the treated water quality measuring step, and the water quality of the treated water. A water treatment method comprising determining a cause of deterioration in water quality of the treated water based on an image taken by at least one of the first photographing step and the second photographing step. The water treatment method according to claim 9.
In the determination step, from the SS concentration of the water to be treated measured by the water quality measurement step of the treated water and the SS concentration of the treated water measured by the water quality measurement step of the treated water, [(SS concentration of water to be treated-treated water SS concentration) / SS concentration of water to be treated], and the image taken by at least one of the first photographing step and the second photographing step, and the treated water. A water treatment method characterized by determining the cause of deterioration of water quality. The first photographing means for photographing the water to be treated of the agglutinating reaction device for injecting a coagulant into the water to be treated and agglutinating the suspended substance to form flocs, and attaching bubbles to the flocs. At least one of the second imaging means for photographing the upper part of the levitation separation tank of the levitation separation device for levitation separation, and
A treated water quality measuring means for measuring the water quality of the treated water of the floating separation device,
When the water quality of the treated water deteriorates as measured by the treated water quality measuring means, the water quality of the treated water is based on an image taken by at least one of the first photographing means and the second photographing means. As a means of determining the cause of the deterioration of
An output means that outputs the result determined by the determination means, and
An abnormality diagnostic device for a levitation separation device, which comprises. The first imaging step of photographing the water to be treated in the agglutination reaction step of injecting a flocculant into the water to be treated to aggregate the suspended substances to form flocs, and levitation to attach bubbles to the flocs to float and separate. Floating in the separation step At least one of the second imaging steps of photographing the upper part of the separation tank and
The treated water quality measuring step of measuring the water quality of the treated water in the floating separation step and
When the water quality of the treated water deteriorates measured by the treated water quality measuring step, the water quality of the treated water is based on the images taken by at least one of the first photographing step and the second photographing step. Judgment process to determine the cause of deterioration of
An output process that outputs the result determined in the determination process and
A method for diagnosing an abnormality of a floating separation device, which comprises.

Images