JP7438027B2 - Control device, operation control method and operation control program - Google Patents

Description

The present disclosure relates to a control device, an operation control method, and an operation control program for a sewage treatment system that purifies sewage.

Traditionally, in sewage treatment systems, operators determine how to operate the sewage to purify the sewage based on the amount of sewage inflow, water quality, etc., and perform the purification process until the water quality is appropriate. All operations were performed manually. Therefore, the operator, who is the worker, has to constantly check the inflow of sewage, water quality, etc., and repeat operations to change the operating conditions as necessary, which poses a problem of heavy burden. To deal with such problems, Patent Document 1 proposes that, in a sewage treatment plant for combined sewerage, a method is calculated based on the dissolved oxygen concentration value, the amount of air blown to the reaction tank, the amount of rainfall, and the amount of water pumped to the initial settling tank. A sewage treatment system that performs fuzzy inference and automatically performs necessary operations has been proposed.

Japanese Patent Application Publication No. 2002-136987

According to the sewage treatment system described in Patent Document 1, there is no need for humans to perform tasks such as checking the state of sewage and performing necessary operations, thereby reducing the burden on humans. However, operators are required to be permanently present at the sewage treatment plant in case of troubles such as unexpected failures of facilities, equipment, equipment, etc., which places a burden on the operators. Therefore, it is desired to realize a system that can reduce the load by eliminating the need for a permanently stationed operator in case of an abnormality such as a sudden accident.

The present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a control device that implements a sewage treatment system that can reduce the load on operators.

In order to solve the above-mentioned problems and achieve the objectives, the present disclosure provides a control device that controls the operation of a sewage treatment device that purifies inflowing sewage, and includes an abnormality detection system that detects an abnormality that occurs in the sewage treatment device. a countermeasure candidate identification section that identifies countermeasure candidates to be implemented when the anomaly detection section detects an abnormality; and a countermeasure candidate identification section that identifies countermeasure candidates corresponding to the abnormality detected by the anomaly detection section. In this case, based on the sewage water quality, the operating conditions of the sewage treatment equipment, and the countermeasure candidates identified by the countermeasure candidate identification section, a set period of time has elapsed since the implementation of the countermeasure candidates identified by the countermeasure candidate identification section. and a water quality estimating unit that estimates a first water quality that is the quality of treated water discharged by the sewage treatment device at a time when the sewage treatment device elapses. When the water quality estimating unit estimates the first water quality, the control device also selects a countermeasure to be implemented for the abnormality detected by the anomaly detecting unit from among the countermeasure candidates based on the estimation result by the water quality estimating unit. The system includes a selection determining unit, and a notification unit that calls an operator based on the identification result by the countermeasure candidate identifying unit and the estimation result by the water quality estimating unit. The notification unit calls an operator when the candidate countermeasure identification unit does not identify a candidate for a countermeasure corresponding to the abnormality detected by the abnormality detection unit, or when the first water quality does not meet a predetermined standard.

According to the control device according to the present disclosure, it is possible to realize a sewage treatment system that can reduce the load on the operator.

A diagram showing a configuration example of a sewage treatment system according to Embodiment 1. A diagram showing a configuration example of a control device included in the sewage treatment system according to Embodiment 1. Flowchart showing an example of the operation of the control device included in the sewage treatment system according to the first embodiment Diagram showing an example of a correspondence table between expected abnormalities in sewage treatment equipment and countermeasures to be taken when an abnormality occurs. Flowchart showing an example of the operation of the control device included in the sewage treatment system according to Embodiment 2 Flowchart showing an example of the operation of the control device included in the sewage treatment system according to Embodiment 3 A diagram showing an example of hardware that implements the control device according to Embodiments 1 to 3.

Below, a control device, an operation control method, and an operation control program according to an embodiment of the present disclosure will be described in detail based on the drawings.

Embodiment 1.
FIG. 1 is a diagram showing a configuration example of a sewage treatment system 100 according to a first embodiment. The sewage treatment system 100 is applied to a sewage treatment plant. The sewage treatment system 100 includes a control device 1 and a sewage treatment device 2.

The control device 1 controls the operation of the sewage treatment device 2 based on data obtained from the sewage treatment device 2 and the like. The sewage treatment device 2 performs a purification process on inflowing sewage, generates treated water, and discharges it. That is, the sewage treatment device 2 treats sewage in a manner instructed by the control device 1, and discharges treated water whose quality satisfies established standards.

Here, in this embodiment, the sewage treatment device 2 may have any configuration as long as it can purify sewage, but it is possible to select and implement one of a plurality of purification methods. The purification method to be implemented is determined by the control device 1 or the operator. The sewage treatment device 2 includes equipment necessary for purifying sewage, such as a settling tank, a first settling tank, a reaction tank, and a second settling tank. The sewage treatment apparatus 2 may be configured to include a plurality of the same types of equipment. The sewage treatment device 2 also includes equipment such as a pump, an agitator, a blower, and a sensor. Examples of sensors are current sensors, voltage sensors, temperature sensors, water quality sensors, etc.

In the sewage treatment system 100 according to the present embodiment, the control device 1 monitors the process in which the sewage treatment device 2 purifies sewage, and instructs the sewage treatment device 2 to change the process if the process needs to be changed. conduct. Further, when the control device 1 determines that it is necessary to notify the operator of the result of monitoring the process in which the sewage treatment device 2 purifies sewage, the control device 1 notifies the operator.

FIG. 2 is a diagram showing a configuration example of the control device 1 included in the sewage treatment system 100 according to the first embodiment. The control device 1 includes a data collection section 11 , an abnormality detection section 12 , a water quality estimation section 13 , a countermeasure determination section 14 , an equipment control section 15 , a notification section 16 , and a storage section 17 .

The data collection unit 11 collects data output from each of the various devices included in the sewage treatment device 2. When the device is a sensor, the data output by the device is sensing data representing a detection result. Further, when the device is other than a sensor, that is, when the device is a pump, a stirrer, etc., the data output by the device is data indicating the operating state of the device. The data indicating the operating state of the device includes information on the operating mode, information indicating whether the device is operating or stopped, information indicating whether the device is operating normally, and the like.

The abnormality detection unit 12 detects an abnormality in the sewage treatment device 2 based on the data collected by the data collection unit 11. The abnormality here refers to a state in which the quality of treated water discharged by the sewage treatment apparatus 2 tends to deteriorate due to a failure of equipment or equipment included in the sewage treatment apparatus 2.

The water quality estimating unit 13 determines whether the sewage treatment device 2 will discharge the water after a predetermined period of time based on the status of each device included in the sewage treatment device 2, the current quality of the treated water discharged by the sewage treatment device 2, etc. Estimate the quality of treated water. When an abnormality is detected by the abnormality detection unit 12, the water quality estimating unit 13 estimates the quality of the treated water at the time when a predetermined period of time has elapsed since countermeasures corresponding to the detected abnormality were implemented. In addition, when there are multiple countermeasures corresponding to the detected abnormality, the water quality estimating unit 13 estimates the water quality of the treated water at the time when a predetermined time has passed after implementing the countermeasures for each of the multiple countermeasures. do.

The countermeasure determining unit 14 determines countermeasures to be implemented when the abnormality detecting unit 12 detects an abnormality in the sewage treatment equipment 2 . Determining the measures to be implemented corresponds to determining the operating conditions of the sewage treatment device 2. The countermeasure determining unit 14 selects a countermeasure to be implemented from among countermeasures prepared in advance. In this embodiment, if there are no selectable measures, the notification unit 16, which will be described later, will notify the operator.

The equipment control unit 15 controls each device included in the sewage treatment device 2 and causes the sewage treatment device 2 to purify sewage. Further, when the abnormality detection unit 12 detects an abnormality in the sewage treatment equipment 2 and the countermeasure determination unit 14 determines a countermeasure to be implemented, the equipment control unit 15 controls the sewage treatment equipment 2 according to the content of the determined countermeasure. Controls each device equipped with.

The notification unit 16 notifies the operator that an abnormality has occurred when the abnormality detection unit 12 detects an abnormality and there is no executable countermeasure. The notification unit 16 notifies a predetermined operator. The number of operators to be notified may be one or more. Furthermore, the operator may be notified by any method. For example, the notification unit 16 may notify the operator by e-mail, or may make a phone call and notify the operator by voice.

The storage unit 17 holds various data. Examples of data held by the storage unit 17 include data collected by the data collection unit 11, data indicating an abnormality detected by the anomaly detection unit 12, data indicating estimation results by the water quality estimation unit 13, and determination results by the countermeasure determination unit 14. data that shows, etc. Furthermore, the storage unit 17 also holds data on the content of countermeasures to be taken when an abnormality occurs in the sewage treatment device 2.

Next, details of the operation of the control device 1 to control the sewage treatment device 2 will be described with reference to FIG. 3. FIG. 3 is a flowchart illustrating an example of the operation of the control device 1 included in the sewage treatment system 100 according to the first embodiment.

For example, when the control device 1 receives a predetermined operation from an operator, it switches to the automatic operation mode and starts the operation shown in FIG. 3 .

The control device 1 first checks whether automatic operation of the sewage treatment system 100 is possible (step S11). Automated operation is a state in which the operator sets the automatic operation mode and does not directly operate the plant, and automatically takes some countermeasures against abnormalities that occur within the plant so that the sewage treatment equipment 2 continues to operate. This refers to purifying sewage so that it can be released as treated water. When the amount of sewage flowing into the sewage treatment equipment 2 is stable, the quality of the treated water discharged from the sewage treatment equipment 2 is also stable, and there is little need for operators to constantly monitor the status of the sewage treatment equipment 2. it is conceivable that. Further, if an abnormality occurs in the sewage treatment device 2, the quality of the treated water may deteriorate, but it is possible to predict what kind of abnormality will occur. Therefore, by preparing countermeasures in advance for each assumed abnormality content, the sewage treatment system 100 can automatically implement the countermeasures without waiting for the operator's judgment. The amount of sewage flowing into the sewage treatment device 2 usually increases when there is rainfall. Therefore, in step S11, the control device 1 determines that automatic operation is possible when there is no rain, and that automatic operation is impossible when there is rain. The presence or absence of rain may be determined based on a detection result by a sensor included in the sewage treatment equipment 2, or may be determined based on data obtained from an external provider that provides weather data including the presence or absence of rain. good. Further, the control device 1 may determine whether or not automatic operation is possible based on the amount of rainfall instead of whether or not there is rain. For example, the control device 1 may determine that automatic driving is possible when the amount of rainfall is less than a predetermined threshold.

In the control device 1, the abnormality detection unit 12, for example, determines whether automatic operation of the sewage treatment system 100 is possible. A functional unit for determining whether automatic operation is possible may be separately provided in the control device 1.

If automatic operation of the sewage treatment system 100 is possible (step S11: Yes), the control device 1 checks whether there is an abnormality in the sewage treatment device 2 (step S12). Specifically, the abnormality detection unit 12 determines whether there is an abnormality based on the data collected by the data collection unit 11. For example, the abnormality detection unit 12 checks whether each piece of data collected by the data collection unit 11 is included in a predetermined normal range, and if there is data that is not included in the normal range, the abnormality detection unit 12 sends a message to the sewage treatment equipment 2. It is determined that there is an abnormality.

If there is no abnormality in the sewage treatment device 2 (step S12: No), the control device 1 returns to step S11 and continues the operation.

If there is an abnormality in the sewage treatment device 2 (step S12: Yes), the control device 1 specifies the range of influence of the abnormality (step S13). The anomaly detection unit 12 identifies the affected range. For example, when the abnormality detected in step S12 is "blower failure," the abnormality detection unit 12 sets the reaction tank in which the failed blower is installed as the affected range. The affected range differs depending on the type of failure, and in some cases, the affected range is the entirety. Note that the control device 1 may detect multiple abnormalities in step S12. In this case, the control device 1 specifies the influence range for each of the plurality of abnormalities.

Next, the control device 1 checks whether there is a selectable countermeasure, that is, whether there is a candidate countermeasure corresponding to the abnormality detected in step S12 (step S14). In this step S14, the abnormality detection unit 12 of the control device 1 operates as a countermeasure candidate identification unit that identifies candidates for countermeasures to be implemented, and data on countermeasures corresponding to the abnormality detected in step S12 exists in the storage unit 17. Check whether It is assumed that the storage unit 17 holds a correspondence table between abnormalities and countermeasures as shown in FIG. 4, for example. FIG. 4 is a diagram showing an example of a correspondence table between assumed abnormalities in the sewage treatment equipment 2 and countermeasures to be taken when the abnormality occurs. If the storage unit 17 holds the correspondence table shown in FIG. 4, the anomaly detection unit 12 determines whether a countermeasure exists based on the affected range identified in step S13 and the correspondence table shown in FIG. do. For example, if a pump breaks down, the measure is to ``switch to a spare pump.'' In this case, the abnormality detection unit 12 determines that a countermeasure exists if there is a spare pump that can be used in place of the failed pump. In addition, if the agitator breaks down, the countermeasure is to ``stir with slight aeration from a blower.'' In this case, the abnormality detection unit 12 determines that a countermeasure exists if a normally operating blower exists within the influence range of the failed agitator, that is, within the influence range specified in step S13. In addition, "stirring with slight aeration from a blower" uses a blower that is within the range affected by a malfunctioning stirrer, and uses a small amount of aeration to stir water in place of the malfunctioning stirrer. Similarly, for other abnormalities, if countermeasures can be taken, the abnormality detection unit 12 determines that countermeasures exist. Note that some of the measures listed in the correspondence table include continuously communicating the status to the operator once or multiple times while performing control, and allowing the operator to select from multiple control candidates. Measures including operator intervention may also be included. Further, even if an abnormality is detected, if it is determined that the device can be continued to be used for the time being, a countermeasure may be taken in which the progress is observed.

If there is a selectable countermeasure, that is, if the countermeasure corresponding to the abnormality detected in step S12 is included in the correspondence table shown in FIG. 4 (step S14: Yes), the control device 1 implements the countermeasure. The water quality at a certain point in the future is predicted (step S15). “A certain point in the future” is, for example, a scheduled time when the period in which the operator is absent from the sewage treatment system 100 ends, or a timing a certain period of time before this scheduled time. In this step S15, the water quality estimation unit 13 predicts water quality using, for example, a known ASM (Activated Sludge Model). ASM is also called an activated sludge model, and is a model that can predict changes in the quality of treated water when the operating conditions of water treatment change. The water quality estimating unit 13 performs a simulation using ASM using the quality of sewage flowing into the sewage treatment device 2 and the operating conditions when the countermeasure is implemented, and predicts the quality of the treated water after 8 hours, for example. The water quality predicted in step S15 corresponds to the first water quality. Note that if the selectable countermeasure is to replace the failed device with a spare device, step S17, which will be described later, may be executed immediately without executing step S15 and step S16, which will be described later.

Next, the control device 1 checks whether the predicted value of water quality obtained by executing step S15 satisfies the standard (step S16). In this step S16, the countermeasure determining unit 14 checks whether the predicted value of water quality satisfies the standard, and either causes the sewage treatment device 2 to perform water treatment after implementing the countermeasures, or treats the sewage without implementing the countermeasures. Decide whether to allow device 2 to continue water treatment. Specifically, the countermeasure determining unit 14 determines to implement the countermeasures and have the sewage treatment equipment 2 perform water treatment if the predicted water quality value satisfies the criteria; If there is no countermeasure, it is decided to have the sewage treatment device 2 perform water treatment (continue the same water treatment as before) without implementing any countermeasures.

When the predicted value of water quality satisfies the standard (step S16: Yes), the control device 1 implements countermeasures (step S17). That is, the equipment control unit 15 controls each device included in the sewage treatment apparatus 2 so as to purify the sewage according to the operating conditions after implementing the countermeasures. After performing step S17, the control device 1 returns to step S11 and continues the operation.

In addition, when the control device 1 determines that automatic operation is impossible in step S11 (step S11: No), when determining that there is no selectable countermeasure in step S14 (step S14: No), and in step If it is determined in S16 that the predicted value of water quality does not meet the standard (step S16: No), an operator is called (step S18). In step S18, the notification unit 16 notifies and calls the operator that the sewage treatment system 100 is in a state where it cannot normally perform sewage treatment. The operator may be summoned by any method. The notification unit 16 makes a call by, for example, making a call to a contact terminal such as a mobile phone or a smartphone owned by the operator, or sending an e-mail. The operator may be summoned using a combination of multiple methods.

The point in time at which the water quality estimation unit 13 predicts the water quality in step S15 above is determined based on the time when the operator will be absent and the time required for the operator to implement the countermeasures. For example, when an operator performs the operation shown in FIG. 3 at night after returning home, the control device 1 (water quality estimating unit 13) calculates the time from the current time until the operator comes to work next time, and the time when the operator returns to work. Based on the time required from checking the abnormal state of the sewage treatment equipment 2 to completing the implementation of countermeasures after going to work, it is determined at which point the water quality should be predicted. For example, if the operator is scheduled to go to work in 4 hours and the time required to confirm the abnormal condition and take countermeasures is 1 hour, the control device 1 will predict the water quality in 5 hours.

As explained above, in the sewage treatment system 100 according to the present embodiment, when an abnormality occurs in the sewage treatment device 2 in the absence of an operator, the control device 1 implements measures prepared in advance. The system predicts the quality of treated water at a set timing after the water has been removed, and if the predicted water quality meets the standards, measures are taken and operation continues, and if the predicted water quality does not meet the standards, an operator is called. . Thereby, there is no need for an operator to be permanently stationed in the sewage treatment system 100, and the load on the operator can be reduced.

In addition, in the operation shown in FIG. 3, the control device 1 calls the operator without implementing countermeasures if the predicted value of water quality does not meet the standard, but the control device 1 calls the operator after implementing the countermeasures. You can do it like this. That is, when the control device 1 detects an abnormality in the sewage treatment device 2, the control device 1 may implement the countermeasures if there are selectable countermeasures, and may also call the operator if necessary. In this case, after determining that the predicted value of water quality does not meet the standard, the control device 1 further estimates at what point in the future the water quality will no longer meet the standard, and calls the operator at a timing based on the estimation result. It doesn't matter if you do it like this. Estimating at what point in the future the water quality will no longer meet the standards is performed using ASM as in step S15 above. The timing for calling the operator is, for example, the time required from calling the operator until the operator arrives at the sewage treatment system 100, and the abnormal state of the sewage treatment equipment 2 after the operator arrives at the sewage treatment system 100. The decision is made based on the time required to confirm and complete the implementation of the countermeasures.

Embodiment 2.
Next, a sewage treatment system according to a second embodiment will be explained. Note that the configuration of the sewage treatment system according to the second embodiment is the same as the sewage treatment system 100 according to the first embodiment. The sewage treatment system according to the second embodiment differs from the sewage treatment system 100 according to the first embodiment in its operation when an abnormality occurs. In this embodiment, descriptions of parts common to Embodiment 1 will be omitted, and parts different from Embodiment 1 will be described.

In the following description, for convenience, the sewage treatment system according to the second embodiment will be referred to as a sewage treatment system 100a. Further, a control device that constitutes the sewage treatment system 100a will be referred to as a control device 1a.

In the sewage treatment system 100 according to the first embodiment, when an abnormality occurs, it is decided to check whether the water quality at a certain point in the future after implementing countermeasures satisfies the standard. However, depending on the nature of the abnormality, there may be cases where the change in water quality is small and there is no need to take any countermeasures. Therefore, the control device 1a of the sewage treatment system 100a according to this embodiment operates according to the flowchart shown in FIG. 5. Note that FIG. 5 is a flowchart showing an example of the operation of the control device 1a included in the sewage treatment system 100a according to the second embodiment.

The flowchart shown in FIG. 5 is obtained by adding steps S21 and S22 between steps S13 and S14 of the flowchart shown in FIG. Steps S11 to S18 are the same as steps S11 to S18 shown in FIG. 3 described in Embodiment 1, so their explanation will be omitted.

The control device 1a of the sewage treatment system 100a according to the present embodiment executes step S13 to identify the range of influence of the abnormality, and then predicts the water quality at a certain point in the future (step S21). The water quality prediction is performed by the water quality estimating unit 13 using ASM, for example, as in step S15 described in the first embodiment. The water quality predicted in step S21 corresponds to the second water quality.

Next, the control device 1 checks whether the predicted value of water quality obtained by executing step S21 satisfies the standard (step S22). If the predicted value of water quality does not meet the criteria (step S22: No), the control device 1 executes step S14 and the subsequent steps. On the other hand, if the predicted value of water quality satisfies the standard (step S22: Yes), there is no need to take any countermeasures, so the control device 1 returns to step S11 and continues the operation.

As described above, when the control device 1a of the sewage treatment system 100a according to the second embodiment detects that an abnormality has occurred in the sewage treatment device 2 in the absence of an operator, the control device 1a continues the operation in the same state. In other words, it is confirmed whether the predicted value of the quality of the treated water at a certain point in the future satisfies the standards. Then, when the operation cannot be continued in the same state, the control device 1a checks the quality of the treated water at a predetermined timing after implementing measures prepared in advance, as in the first embodiment. If the predicted water quality meets the standards, measures will be taken and operation will continue. On the other hand, if the predicted water quality does not meet the standards, the control device 1a calls an operator. According to the second embodiment, the same effects as the first embodiment can be obtained. Further, in the present embodiment, if the quality of the treated water can meet the standard without implementing the countermeasure, the countermeasure is not implemented, so unnecessary control can be prevented. Furthermore, even though the quality of the treated water can meet the standards without implementing any countermeasures, there are no selectable countermeasures to call operators. You can avoid calling.

Embodiment 3.
Next, a sewage treatment system according to Embodiment 3 will be described. Note that the configuration of the sewage treatment system according to the third embodiment is the same as the sewage treatment system 100 according to the first embodiment. The sewage treatment system according to the third embodiment differs from the sewage treatment system 100 according to the first embodiment in its operation when an abnormality occurs. In this embodiment, descriptions of parts common to Embodiment 1 will be omitted, and parts different from Embodiment 1 will be described.

In the following description, for convenience, the sewage treatment system according to the third embodiment will be referred to as a sewage treatment system 100b. Moreover, the control device that configures the sewage treatment system 100b will be referred to as a control device 1b.

In the sewage treatment system 100 according to the first embodiment, there is only one type of countermeasure that can be taken when an abnormality occurs in the sewage treatment device 2. On the other hand, in the sewage treatment system 100b according to the present embodiment, there may be multiple types of measures that can be taken when an abnormality occurs in the sewage treatment device 2.

FIG. 6 is a flowchart showing an example of the operation of the control device 1b included in the sewage treatment system 100b according to the third embodiment. The flowchart shown in FIG. 6 has a step S31 added between step S14 and step S15 of the flowchart shown in FIG. 3, and when the determination in step S31 is "Yes", steps S32 to S34 are executed. This is what I did. Steps S11 to S18 are the same as steps S11 to S18 shown in FIG. 3 described in Embodiment 1, so their explanation will be omitted.

When the control device 1b of the sewage treatment system 100b according to the present embodiment determines that there are selectable measures in step S14 (step S14: Yes), it checks whether there are multiple selectable measures (step S31). If there is only one selectable measure (step S31: No), the control device 1b executes step S15. On the other hand, if there are a plurality of selectable measures (Step S31: Yes), the control device 1b predicts the water quality at a certain point in the future when each selectable measure is implemented (Step S32). The water quality prediction is performed by the water quality estimating unit 13 using ASM, for example, as in step S15 described in the first embodiment.

Next, the control device 1b checks whether there is a measure that satisfies the standard for the predicted water quality value, that is, whether there is any measure that satisfies the standard among the predicted water quality values obtained in step S32 (step S33). . If there is a measure whose predicted water quality value satisfies the standard (step S33: Yes), the control device 1b selects and implements the measure whose predicted value is the best among the measures whose predicted water quality value satisfies the standard (step S33: Yes). S34). On the other hand, if there is no countermeasure that satisfies the predicted water quality standard (step S33: No), the control device 1b calls the operator (step S18). Note that the countermeasure determining unit 14 checks whether there is a countermeasure that makes the predicted value of water quality meet the standard and selects the countermeasure to be implemented.

In this way, when the control device 1b of the sewage treatment system 100b according to the third embodiment detects that an abnormality has occurred in the sewage treatment device 2 in the absence of an operator, it takes measures prepared in advance. The quality of treated water is predicted at a specified timing after implementation, and if the predicted water quality meets the standards, measures are taken and operation continues, and if the predicted water quality does not meet the standards, operators are removed. call. In addition, if there are multiple measures that can be selected, the quality of treated water at a specified timing after implementing the measures is predicted for each of the multiple measures, and some of the predicted water quality meets the standards. If so, take measures to ensure the best quality of treated water. According to the third embodiment, the same effects as the first embodiment can be obtained. Furthermore, it is possible to implement the most suitable measure for the state of the sewage treatment device 2 from among the plurality of measures.

Note that, similarly to the control device 1a of the sewage treatment system 100a according to the second embodiment, the control device 1b may further execute steps S21 and S22 shown in FIG. 5 following step S13.

Next, the hardware configuration of the control device (control device 1, 1a, 1b) according to the first to third embodiments will be explained. FIG. 7 is a diagram showing an example of hardware that implements the control device according to the first to third embodiments.

The control device according to the first to third embodiments can be realized by the processor 101, the memory 102, the interface circuit 103, and the communication device 104. An example of the processor 101 is a CPU (Central Processing Unit, also referred to as a central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP (Digital Signal Processor)) or a system LSI (Large Scale Integration). Examples of the memory 102 include nonvolatile or volatile semiconductor memories such as RAM (Random Access Memory), ROM (Read Only Memory), and flash memory, magnetic disks, and the like.

The data collection unit 11, abnormality detection unit 12, water quality estimation unit 13, countermeasure determination unit 14, equipment control unit 15, and notification unit 16 of the control device are configured so that the processor 101 executes an operation control program to operate as each of these units. This is achieved by Operation control programs for operating as the data collection section 11, the abnormality detection section 12, the water quality estimation section 13, the countermeasure determination section 14, the equipment control section 15, and the notification section 16 are stored in the memory 102 in advance. The processor 101 operates as a data collection unit 11, an abnormality detection unit 12, a water quality estimation unit 13, a countermeasure determination unit 14, an equipment control unit 15, and a notification unit 16 by reading an operation control program from the memory 102 and executing it.

The memory 102 holds the above-mentioned operation control program and also realizes the storage section 17 of the control device. The interface circuit 103 is a circuit for transmitting and receiving data with the sewage treatment equipment 2, and is used when the data collection unit 11 collects data from the sewage treatment equipment 2, and the equipment control unit 15 It is used when controlling the device 2. The communication device 104 is used when the notification unit 16 issues a notification to call an operator.

Note that, although the above-mentioned operation control program is pre-stored in the memory 102, the present invention is not limited thereto. The above operation control program may be provided to the user in a state written on a recording medium such as a CD (Compact Disc)-ROM or a DVD (Digital Versatile Disc)-ROM, and installed in the memory 102 by the user. good. Moreover, the above-mentioned operation control program may be provided to the user via a network such as the Internet.

The configurations shown in the embodiments above are merely examples, and can be combined with other known techniques, or can be combined with other embodiments, without departing from the scope of the invention. It is also possible to omit or change part of the configuration.

1, 1a, 1b control device, 2 sewage treatment device, 11 data collection unit, 12 abnormality detection unit, 13 water quality estimation unit, 14 countermeasure determination unit, 15 equipment control unit, 16 notification unit, 17 storage unit, 100 sewage treatment system .

Claims (7)

A control device that controls the operation of a sewage treatment device that purifies inflowing sewage,
an abnormality detection unit that detects an abnormality occurring in the sewage treatment equipment;
a countermeasure candidate identification unit that identifies countermeasure candidates to be implemented when the abnormality detection unit detects an abnormality;
When a candidate for a countermeasure corresponding to the abnormality detected by the abnormality detection section is identified by the countermeasure candidate identification section, the water quality of the sewage, the operating conditions of the sewage treatment equipment, and the countermeasure candidate identification section are identified. a first water quality that is the quality of treated water discharged by the sewage treatment equipment when a predetermined time has elapsed after implementing the candidate measures identified by the candidate measure identification unit based on the candidate measures identified by the candidate measure identification unit; a water quality estimation section that estimates
When the water quality estimation unit estimates the first water quality, a countermeasure to be implemented for the abnormality detected by the abnormality detection unit is selected from among the countermeasure candidates based on the estimation result by the water quality estimation unit. A countermeasure decision department,
a notification unit that calls an operator based on the identification result by the countermeasure candidate identification unit and the estimation result by the water quality estimation unit;
Equipped with
The notification unit is configured to control the operation when the countermeasure candidate identification unit does not identify a candidate for a countermeasure corresponding to the abnormality detected by the abnormality detection unit, or when the first water quality does not meet a predetermined standard. call a member,
A control device characterized by: When the first water quality meets the criteria,
the countermeasure determining unit decides to implement the selected countermeasure;
The control device according to claim 1, characterized in that: The water quality estimating unit is configured to perform the specified method when the sewage treatment equipment continues to operate without implementing measures to deal with the abnormality detected by the abnormality detection unit, when an abnormality is detected by the abnormality detection unit. estimating the second water quality, which is the quality of the treated water discharged by the sewage treatment device, at the time when the time has elapsed;
The countermeasure candidate identifying unit identifies the candidate when the water quality estimating unit estimates the second water quality and the second water quality does not meet the criteria;
The countermeasure determining unit selects a countermeasure corresponding to the abnormality detected by the abnormality detecting unit when the second water quality does not meet the criterion, and selects a countermeasure when the second water quality satisfies the criterion. Deciding not to implement
The control device according to claim 1 or 2 , characterized in that: The water quality estimating unit estimates the first water quality when the second water quality does not meet the criteria.
The control device according to claim 3 , characterized in that: If there are multiple measures to deal with the abnormality detected by the abnormality detection unit,
The water quality estimating unit estimates the first water quality in a case where each of a plurality of measures corresponding to the abnormality detected by the abnormality detecting unit is implemented,
The countermeasure determining unit determines to implement a countermeasure that will improve the first water quality the best.
The control device according to any one of claims 1 to 4 , characterized in that: An operation control method in which a control device controls the operation of a sewage treatment device that purifies inflowing sewage, the method comprising:
an abnormality detection step of detecting an abnormality occurring in the sewage treatment equipment;
a countermeasure candidate identification step for identifying countermeasure candidates to be implemented when an abnormality is detected in the abnormality detection step;
When a countermeasure candidate corresponding to the abnormality detected in the abnormality detection step is identified in the countermeasure candidate identification step, the sewage water quality, the operating conditions of the sewage treatment equipment, and the countermeasure candidate identification step are identified in the countermeasure candidate identification step. Based on the candidate countermeasures identified in the countermeasure candidate identification step, a first parameter that is the quality of the treated water discharged by the sewage treatment equipment after a predetermined time has elapsed after implementing the countermeasure candidates identified in the countermeasure candidate identification step. a water quality estimation step for estimating water quality;
When the first water quality is estimated in the water quality estimation step, a countermeasure to be implemented for the abnormality detected in the abnormality detection step is selected from among the countermeasure candidates based on the estimation result in the water quality estimation step. a selection step of selecting;
a notification step of calling an operator based on the identification result in the countermeasure candidate identification step and the estimation result in the water quality estimation step;
including;
In the notification step, if a candidate for a countermeasure corresponding to the abnormality detected in the abnormality detection step is not identified in the countermeasure candidate identification step, or if the first water quality does not meet a predetermined standard, the operation call a member,
An operation control method characterized by: an abnormality detection step for detecting an abnormality occurring in a sewage treatment device that purifies inflowing sewage;
a countermeasure candidate identification step for identifying countermeasure candidates to be implemented when an abnormality is detected in the abnormality detection step;
When a countermeasure candidate corresponding to the abnormality detected in the abnormality detection step is identified in the countermeasure candidate identification step, the sewage water quality, the operating conditions of the sewage treatment equipment, and the countermeasure candidate identification step are identified in the countermeasure candidate identification step. Based on the candidate countermeasures identified in the countermeasure candidate identification step, a first parameter that is the quality of the treated water discharged by the sewage treatment equipment after a predetermined time has elapsed after implementing the countermeasure candidates identified in the countermeasure candidate identification step. a water quality estimation step for estimating water quality;
When the first water quality is estimated in the water quality estimation step, a countermeasure to be implemented for the abnormality detected in the abnormality detection step is selected from among the countermeasure candidates based on the estimation result in the water quality estimation step. a selection step of selecting;
a notification step of calling an operator based on the identification result in the countermeasure candidate identification step and the estimation result in the water quality estimation step;
make the computer run
In the notification step, if a candidate for a countermeasure corresponding to the abnormality detected in the abnormality detection step is not identified in the countermeasure candidate identification step, or if the first water quality does not meet a predetermined standard, the operation call a member,
An operation control program characterized by:

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