阅读说明：本技术 水处理设施的管理装置、水处理设施的清洗药液订购系统、水处理设施的药液订购方法及水处理设施的药液清洗计划制定方法 (Management device for water treatment facility, cleaning chemical solution ordering system for water treatment facility, chemical solution ordering method for water treatment facility, and chemical so) 是由 小林拓之 铃木伸和 宫川幸治 兼品泰宏 于 2018-11-22 设计创作，主要内容包括：使用膜分离装置的水处理设施的管理装置(20)具备：接收从对设置有膜分离装置的水处理系统的运行信息进行管理的管理终端(11)～(1n)经由通信介质发送的运行信息及清洗药液库存信息的水处理设施信息接收部(21)；基于运行信息对水处理系统的跨膜压差的推移进行预测的跨膜压差预测部(23)；以在由跨膜压差预测部预测的跨膜压差的值或变化率到达设定值的时期之前进行药液清洗的方式制定药液清洗计划的药液清洗计划制定部(24)；基于药液清洗计划及清洗药液库存信息来生成药液订购信息的药液订购信息生成部(27)；以及将由药液订购信息生成部生成的药液订购信息向包含管理终端的外部装置发送的药液订购信息发送部(28)。(A management device (20) for a water treatment facility using a membrane separation device is provided with: a water treatment facility information receiving unit (21) that receives operation information and cleaning chemical stock information transmitted from management terminals (11) to (1n) that manage operation information of a water treatment system provided with a membrane separation device via a communication medium; a transmembrane pressure difference predicting unit (23) that predicts a transition of a transmembrane pressure difference of the water treatment system based on the operation information; a chemical solution cleaning plan making unit (24) for making a chemical solution cleaning plan so as to perform chemical solution cleaning before the time when the value or the change rate of the transmembrane pressure difference predicted by the transmembrane pressure difference predicting unit reaches a set value; a chemical solution ordering information generating unit (27) for generating chemical solution ordering information on the basis of the chemical solution cleaning plan and the cleaning chemical solution inventory information; and a chemical solution ordering information transmitting unit (28) for transmitting the chemical solution ordering information generated by the chemical solution ordering information generating unit to an external device including a management terminal.)

1. A management device for a water treatment facility provided with a plurality of water treatment systems using membrane separation devices, the management device for a water treatment facility comprising:

a water treatment facility information receiving unit that receives operation information and cleaning solution inventory information transmitted from a management terminal via a communication medium, the management terminal managing operation information of each of the water treatment systems in which the membrane separation device is installed;

a transmembrane pressure difference predicting unit that predicts a transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information;

a chemical solution cleaning plan creating unit that creates a chemical solution cleaning plan so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting unit reaches a set value;

an operation condition adjustment information generation section that generates operation condition adjustment information for adjusting the arrival timing of the set value of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the arrival timings of the set values of the transmembrane pressure differences of each of the water treatment systems predicted by the transmembrane pressure difference prediction section do not coincide; and

an operation condition adjustment information transmitting unit that transmits the operation condition adjustment information to the management terminal,

the chemical cleaning plan creating unit creates the chemical cleaning plan by using the operation condition adjustment information.

2. The management device for a water treatment facility according to claim 1, further comprising:

a chemical solution ordering information generating unit that generates chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information; and

a chemical solution ordering information transmitting unit that transmits the chemical solution ordering information generated by the chemical solution ordering information generating unit to an external device including the management terminal.

3. A management device for a water treatment facility, in which a management terminal for managing operation information of a plurality of water treatment systems provided with membrane separation devices is incorporated, the management device comprising:

a water treatment facility information collection unit that collects operation information and cleaning agent inventory information of each of the water treatment systems provided with the membrane separation device;

a transmembrane pressure difference predicting unit that predicts a transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information;

a chemical solution cleaning plan creating unit that creates a chemical solution cleaning plan so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting unit reaches a set value;

an operation condition adjustment information generation section that generates operation condition adjustment information for adjusting the arrival timing of the set value of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the arrival timings of the set values of the transmembrane pressure differences of each of the water treatment systems predicted by the transmembrane pressure difference prediction section do not coincide; and

an operation condition adjustment information transmitting unit that transmits the operation condition adjustment information to the management terminal,

the chemical cleaning plan creating unit creates the chemical cleaning plan by using the operation condition adjustment information.

4. The management device of a water treatment facility according to claim 3,

the system further includes a chemical solution ordering information generating unit that generates chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information.

5. The management device of a water treatment facility according to any one of claims 1 to 4,

the operation condition adjustment information includes any one of a flux, an excess sludge extraction amount, a sludge circulation amount, an aeration air volume, and a liquid medicine washing period.

6. The management device of a water treatment facility according to claim 2,

the external device includes any one of the management terminal, a manager terminal of the water treatment facility, and a supplier terminal of the chemical solution.

7. The management device of a water treatment facility according to any one of claims 1 to 6,

the operation information comprises transmembrane pressure difference, flux, water temperature, aeration air volume, turbidity, treated water volume, pH, DO, ORP, M L SS, TOC, COD, BOD, NH of the water treatment system₃Any one of these or a combination of these.

8. The management device of a water treatment facility according to any one of claims 1 to 7,

the chemical solution cleaning plan making unit is configured to determine the type of the chemical solution to be used for the chemical solution cleaning based on the tendency of the transmembrane pressure difference predicted by the transmembrane pressure difference predicting unit to increase and/or the tendency of the transmembrane pressure difference included in the operation information to increase.

9. A cleaning solution ordering system for a water treatment facility, comprising:

a management device for a water treatment facility according to claim 2;

a management terminal for managing operation information of the water treatment system provided with the membrane separation device and transmitting the operation information and cleaning solution inventory information to the management device; and

a supplier terminal of the medical fluid which arranges the supply of the medical fluid based on the medical fluid ordering information transmitted from the management apparatus,

the management device, the management terminal, and the provider terminal are connected so as to be able to communicate.

10. A chemical solution ordering method for a water treatment facility, comprising:

an operation information transmission step of transmitting operation information and cleaning liquid medicine stock information from a management terminal, which manages operation information of a plurality of water treatment systems provided with membrane separation devices, to a management device via a communication medium;

a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information by a transmembrane pressure difference prediction unit provided in the management device;

a chemical solution cleaning plan creating step of creating a chemical solution cleaning plan by a chemical solution cleaning plan creating unit included in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting step reaches a set value;

a chemical solution ordering information generating step of generating chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information by a chemical solution ordering information generating unit provided in the management device;

an operation condition adjustment information generation step of generating operation condition adjustment information for adjusting the set value arrival period of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the set value arrival period of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference prediction step does not coincide; and

an operation condition adjustment information transmission step of transmitting the operation condition adjustment information generated in the operation condition adjustment information generation step to the management terminal,

in the chemical solution cleaning plan making step, the chemical solution cleaning plan is made by taking the operation condition adjustment information generated in the operation condition adjustment information generating step.

11. The chemical solution ordering method for water treatment facilities according to claim 10, comprising:

a chemical solution ordering information transmitting step of transmitting the chemical solution ordering information generated in the chemical solution ordering information generating step to an external apparatus including the management terminal, by a chemical solution ordering information transmitting unit provided in the management apparatus; and

and a cleaning chemical liquid sending step of sending the cleaning chemical liquid to a water treatment facility provided with the water treatment system through a chemical liquid supplier terminal based on chemical liquid ordering information received from the management device or the management terminal.

12. A chemical solution ordering method for a water treatment facility, comprising:

an operation information collection step of collecting operation information of a plurality of water treatment systems provided with membrane separation devices and cleaning liquid medicine inventory information in a management device;

a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information by a transmembrane pressure difference prediction unit provided in the management device;

a chemical solution cleaning plan creating step of creating a chemical solution cleaning plan by a chemical solution cleaning plan creating unit included in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted in the transmembrane pressure difference predicting step reaches a set value;

a chemical solution ordering information generating step of generating chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information by a chemical solution ordering information generating unit provided in the management device; and

an operation condition adjustment information generation step of generating operation condition adjustment information for adjusting the set value arrival period of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the set value arrival period of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference prediction step does not coincide,

in the chemical solution cleaning plan making step, the chemical solution cleaning plan is made by taking the operation condition adjustment information generated in the operation condition adjustment information generating step.

13. The chemical solution ordering method for water treatment facilities according to claim 12, comprising:

a chemical solution ordering information transmitting step of transmitting the chemical solution ordering information generated in the chemical solution ordering information generating step to an external device of a supplier terminal including a chemical solution, by a chemical solution ordering information transmitting unit provided in the management device; and

and a cleaning chemical liquid sending step of sending the cleaning chemical liquid to a water treatment facility provided with the water treatment system through a chemical liquid supplier terminal based on chemical liquid ordering information received from the management device or the external device.

14. A method for creating a chemical cleaning plan for a water treatment facility, comprising:

an operation information transmission step of transmitting operation information and cleaning liquid medicine stock information from a management terminal, which manages operation information of a plurality of water treatment systems provided with membrane separation devices, to a management device via a communication medium;

a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information by a transmembrane pressure difference prediction unit provided in the management device;

a chemical solution cleaning plan creating step of creating a chemical solution cleaning plan by a chemical solution cleaning plan creating unit included in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting step reaches a set value;

an operation condition adjustment information generation step of generating operation condition adjustment information for adjusting the set value arrival period of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the set value arrival period of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference prediction step does not coincide; and

an operation condition adjustment information transmission step of transmitting the operation condition adjustment information generated in the operation condition adjustment information generation step to the management terminal,

in the chemical solution cleaning plan making step, the chemical solution cleaning plan is made by taking the operation condition adjustment information generated in the operation condition adjustment information generating step.

15. A method for creating a chemical cleaning plan for a water treatment facility, comprising:

an operation information collection step of collecting operation information of a plurality of water treatment systems provided with membrane separation devices and cleaning liquid medicine inventory information in a management device;

a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information by a transmembrane pressure difference prediction unit provided in the management device;

a chemical solution cleaning plan creating step of creating a chemical solution cleaning plan by a chemical solution cleaning plan creating unit included in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting step reaches a set value; and

an operation condition adjustment information generation step of generating operation condition adjustment information for adjusting the set value arrival period of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the set value arrival period of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference prediction step does not coincide,

in the chemical solution cleaning plan making step, the chemical solution cleaning plan is made by taking the operation condition adjustment information generated in the operation condition adjustment information generating step.

Technical Field

The present invention relates to a management device for a water treatment facility, a cleaning chemical solution ordering system for a water treatment facility, a chemical solution ordering method for a water treatment facility, and a chemical solution cleaning plan making method for a water treatment facility.

Background

Patent document 1 proposes a maintenance management method for an immersion type membrane separation apparatus, which determines a replacement timing based on a driving pressure and a permeate amount of membrane elements included in the immersion type membrane separation apparatus, and orders membrane elements for replacement.

The maintenance management method is configured to determine the operation state of the submerged membrane separation apparatus and the properties of the activated sludge by using, as an index, a measured value of a driving pressure acting on the membrane surface of the membrane element and the amount of permeate water flowing through the treated water extraction system, and applying data on the driving pressure and the amount of permeate water, which are obtained in advance as an empirical rule, and the operation state of the submerged membrane separation apparatus and the properties of the activated sludge to the index.

The chemical cleaning timing and whether or not the membrane element needs to be replaced are determined based on the determination result, the determination result and the determination are instructed to a maintenance manager on site through the communication line, and the membrane element for replacement is instructed to be distributed to the component center through the communication line.

That is, the operation state of the submerged membrane separation apparatus and the properties of the activated sludge are determined by a computer of the central monitoring center, and the operation state of each water treatment facility provided with the submerged membrane separation apparatus can be monitored in a centralized manner.

Disclosure of Invention

In view of the above-described problems, an object of the present invention is to provide a management device for a water treatment facility, a cleaning chemical solution ordering system for a water treatment facility, a chemical solution ordering method for a water treatment facility, and a chemical solution cleaning plan making method for a water treatment facility, which can make an appropriate cleaning timing even in an abnormal situation, and can avoid an excessive stock of a cleaning chemical solution.

Means for solving the problems

In order to achieve the above object, a first aspect of a management device for a water treatment facility according to the present invention is a management device for a water treatment facility including a plurality of water treatment systems using membrane separation devices, the management device further including: a water treatment facility information receiving unit that receives operation information and cleaning solution inventory information transmitted from a management terminal via a communication medium, the management terminal managing operation information of each of the water treatment systems in which the membrane separation device is installed; a transmembrane pressure difference predicting unit that predicts a transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information; a chemical solution cleaning plan creating unit that creates a chemical solution cleaning plan so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting unit reaches a set value; an operation condition adjustment information generation section that generates operation condition adjustment information for adjusting the arrival timing of the set value of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the arrival timings of the set values of the transmembrane pressure differences of each of the water treatment systems predicted by the transmembrane pressure difference prediction section do not coincide; and an operation condition adjustment information transmitting unit that transmits the operation condition adjustment information to the management terminal, wherein the chemical cleaning plan creating unit creates the chemical cleaning plan by using the operation condition adjustment information.

The management device for a water treatment facility according to the present invention can prevent the occurrence of an abnormal increase in transmembrane pressure because the management device for a water treatment facility predicts the transition of transmembrane pressure difference in the water treatment system by the transmembrane pressure difference predicting unit based on the operation information received from the management terminal for managing the operation information of the water treatment system provided with the membrane separation device via the water treatment facility information receiving unit, and the chemical solution cleaning plan is prepared by the chemical solution cleaning plan preparing unit so as to perform chemical solution cleaning before the time when the predicted value of the transition of transmembrane pressure difference or the change rate thereof reaches the set value.

As a result of transmitting the operation condition adjustment information generated by the operation condition adjustment information generation section to the management terminals and adjusting the operation conditions for the water treatment system of the water treatment facility operated and managed by each management terminal, the set value arrival timing of the transmembrane pressure difference predicted by the transmembrane pressure difference prediction section is adjusted forward or backward. The chemical cleaning plan making unit makes a chemical cleaning plan that adopts the operation condition adjustment information.

For example, as a result of the adjustment of the operating conditions for the respective water treatment systems of the water treatment facilities whose operation is managed by the respective management terminals, the arrival times of the set values of the transmembrane pressure differences for the respective water treatment systems predicted by the transmembrane pressure difference predicting section are adjusted forward or backward so as not to coincide with each other.

The chemical cleaning plan making unit makes a chemical cleaning plan that adopts the operation condition adjustment information. Therefore, the stock quantity of the chemical solution can be kept to a minimum without preparing a large amount of the chemical solution in a large storage space.

In addition to the first characteristic feature, the present invention further includes: a chemical solution ordering information generating unit that generates chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information; and a chemical solution ordering information transmitting unit that transmits the chemical solution ordering information generated by the chemical solution ordering information generating unit to an external device including the management terminal.

The chemical solution ordering information generating unit generates necessary chemical solution ordering information based on the cleaning chemical solution inventory information received from the management terminal via the water treatment facility information receiving unit and the chemical solution cleaning plan prepared by the chemical solution cleaning plan preparing unit, and transmits the chemical solution ordering information from the chemical solution ordering information transmitting unit to the external device including the management terminal. Therefore, the timing and amount of the chemical liquid required for each water treatment system can be grasped in advance, and the chemical liquid can be ordered to keep up with the execution of the cleaning plan, so that it is not necessary to keep an excessive stock.

In the third aspect, there is provided a water treatment facility management apparatus incorporating a management terminal for managing operation information of a plurality of water treatment systems provided with membrane separation devices, the water treatment facility management apparatus including: a water treatment facility information collection unit that collects operation information and cleaning agent inventory information of each of the water treatment systems provided with the membrane separation device; a transmembrane pressure difference predicting unit that predicts a transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information; a chemical solution cleaning plan creating unit that creates a chemical solution cleaning plan so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting unit reaches a set value; an operation condition adjustment information generation section that generates operation condition adjustment information for adjusting the arrival timing of the set value of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the arrival timings of the set values of the transmembrane pressure differences of each of the water treatment systems predicted by the transmembrane pressure difference prediction section do not coincide; and an operation condition adjustment information transmitting unit that transmits the operation condition adjustment information to the management terminal, wherein the chemical cleaning plan creating unit creates the chemical cleaning plan by using the operation condition adjustment information.

In the management device according to the first characteristic configuration, the chemical solution cleaning plan is prepared for each of the water treatment facilities based on the operation information and the cleaning chemical solution inventory information received from each of the management terminals provided in the plurality of water treatment facilities via the communication medium, and the chemical solution ordering information is generated. However, according to the third characteristic configuration, the management terminal provided in each water treatment facility functions as the management device of the first characteristic configuration, and the chemical solution cleaning plan is made by using the operation condition adjustment information in which the arrival timing of the set value of the transmembrane pressure difference is adjusted forward or backward, so that the stock quantity of the chemical solution can be kept to a minimum without preparing a large amount of the chemical solution in a large storage space.

In the fourth characteristic configuration, in addition to the third characteristic configuration, the chemical solution ordering apparatus further includes a chemical solution ordering information generating unit that generates chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information.

Since the timing and amount of the chemical liquid required by each water treatment system of the water treatment facility managed by the user can be grasped in advance, the chemical liquid can be ordered to keep up with the execution of the cleaning plan, and therefore, it is not necessary to keep an excessive stock.

A fifth characteristic configuration is the same as the first characteristic configuration, wherein the operation condition adjustment information includes any one of a flux, an excess sludge extraction amount, a sludge circulation amount, an aeration air volume, and a chemical cleaning period, in addition to any one of the first to fourth characteristic configurations.

As the operation conditions for each water treatment system, any of the flux, the excess sludge extraction amount, the sludge circulation amount, the aeration air volume, and the chemical cleaning period can be appropriately used. For example, the flux of the membrane separation apparatus is increased or decreased to adjust the change in transmembrane pressure difference rapidly or slowly, and the amount of excess sludge extracted is increased or decreased to adjust the BOD load and the amount of fouling substances present.

In the sixth characteristic configuration, in addition to the second characteristic configuration, the external device includes any one of the management terminal, a manager terminal of the water treatment facility, and a supplier terminal of the chemical solution.

The chemical liquid ordering information is transmitted to any one of the management terminal, the manager terminal of the water treatment facility, and the chemical liquid supplier terminal, whereby the chemical liquid can be appropriately acquired.

The seventh characteristic configuration is such that, in addition to any one of the first to sixth characteristic configurations described above, the operation information is transmembrane pressure difference, flux, water temperature, aeration air volume, turbidity, treated water volume, pH, DO, ORP, M L SS, TOC, COD, BOD, NH of the water treatment system₃Any one of these or a combination of these.

As the operation information necessary for predicting the transition of the transmembrane pressure difference of the water treatment system, the transmembrane pressure difference, flux, water temperature, aeration air volume, turbidity, treated water volume, pH, DO, ORP, M L SS, TOC, COD, BOD, NH, etc. of the water treatment system can be preferably used₃Either or a combination of these values.

In the eighth characteristic configuration, in addition to any one of the first to seventh characteristic configurations, the chemical solution cleaning plan making unit may be configured to determine a type of the chemical solution to be used for the chemical solution cleaning based on a tendency of an increase in the transmembrane pressure difference predicted by the transmembrane pressure difference predicting unit and/or a tendency of an increase in the transmembrane pressure difference included in the operation information.

As the chemical used for chemical cleaning based on the tendency of transmembrane pressure difference predicted by the transmembrane pressure difference predicting section and/or the tendency of transmembrane pressure difference included in the operation information, it is appropriately determined whether a chemical effective against an inorganic scale substance such as hydrochloric acid, oxalic acid, or citric acid or a chemical effective against an organic scale substance such as sodium hypochlorite is preferable.

A cleaning chemical ordering system for a water treatment facility according to the present invention is characterized by comprising, as described in the ninth aspect: a management device for a water treatment facility having the second characteristic structure; a management terminal for managing operation information of the water treatment system provided with the membrane separation device and transmitting the operation information and cleaning solution inventory information to the management device; and a chemical solution supplier terminal that arranges supply of a chemical solution based on chemical solution order information transmitted from the management apparatus, wherein the management apparatus, the management terminal, and the chemical solution supplier terminal are connected so as to be communicable.

By connecting the management device of the water treatment facility having the second characteristic configuration, the management terminal that transmits the operation information and the cleaning chemical stock information to the management device, and the supplier terminal that arranges the chemical to be supplied based on the chemical ordering information transmitted from the management device so as to enable communication, an appropriate cleaning time can be made even in an abnormal situation, and a cleaning chemical ordering system that can avoid an excess stock of the cleaning chemical can be constructed.

A first characteristic configuration of a chemical solution ordering method for a water treatment facility according to the present invention is a chemical solution ordering method for a water treatment facility, comprising: an operation information transmission step of transmitting operation information and cleaning liquid medicine stock information from a management terminal, which manages operation information of a plurality of water treatment systems provided with membrane separation devices, to a management device via a communication medium; a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information by a transmembrane pressure difference prediction unit provided in the management device; a chemical solution cleaning plan creating step of creating a chemical solution cleaning plan by a chemical solution cleaning plan creating unit included in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting step reaches a set value; a chemical solution ordering information generating step of generating chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information by a chemical solution ordering information generating unit provided in the management device; an operation condition adjustment information generation step of generating operation condition adjustment information for adjusting the set value arrival period of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the set value arrival period of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference prediction step does not coincide; and an operation condition adjustment information transmission step of transmitting the operation condition adjustment information generated in the operation condition adjustment information generation step to the management terminal, wherein in the chemical cleaning plan formulation step, the chemical cleaning plan is formulated using the operation condition adjustment information generated in the operation condition adjustment information generation step.

In addition to the first characteristic feature, the present invention further includes: a chemical solution ordering information transmitting step of transmitting the chemical solution ordering information generated in the chemical solution ordering information generating step to an external apparatus including the management terminal, by a chemical solution ordering information transmitting unit provided in the management apparatus; and a cleaning chemical liquid sending process of sending the cleaning chemical liquid to a water treatment facility provided with the water treatment system through a chemical liquid supplier terminal based on chemical liquid ordering information received from the management device or the management terminal.

The present invention has a third characteristic feature in that: an operation information collection step of collecting operation information of a plurality of water treatment systems provided with membrane separation devices and cleaning liquid medicine inventory information in a management device; a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information by a transmembrane pressure difference prediction unit provided in the management device; a chemical solution cleaning plan creating step of creating a chemical solution cleaning plan by a chemical solution cleaning plan creating unit included in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted in the transmembrane pressure difference predicting step reaches a set value; a chemical solution ordering information generating step of generating chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information by a chemical solution ordering information generating unit provided in the management device; and an operation condition adjustment information generation step of generating operation condition adjustment information for adjusting forward or backward an arrival time of the set value of the transmembrane pressure difference of each of the water treatment systems so that the arrival time of the set value of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference prediction step does not coincide, wherein in the chemical solution cleaning plan formulation step, the chemical solution cleaning plan is formulated by taking in the operation condition adjustment information generated in the operation condition adjustment information generation step.

In addition to the third characteristic feature, the fourth characteristic feature is characterized by including: a chemical solution ordering information transmitting step of transmitting the chemical solution ordering information generated in the chemical solution ordering information generating step to an external device of a supplier terminal including a chemical solution, by a chemical solution ordering information transmitting unit provided in the management device; and a cleaning chemical liquid sending process of sending the cleaning chemical liquid to a water treatment facility provided with the water treatment system through a chemical liquid supplier terminal based on chemical liquid ordering information received from the management device or the external device.

A first characteristic configuration of a chemical cleaning plan planning method for a water treatment facility according to the present invention is, as described in the fourteenth aspect, characterized by comprising: an operation information transmission step of transmitting operation information and cleaning liquid medicine stock information from a management terminal, which manages operation information of a plurality of water treatment systems provided with membrane separation devices, to a management device via a communication medium; a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information by a transmembrane pressure difference prediction unit provided in the management device; a chemical solution cleaning plan creating step of creating a chemical solution cleaning plan by a chemical solution cleaning plan creating unit included in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting step reaches a set value; an operation condition adjustment information generation step of generating operation condition adjustment information for adjusting the set value arrival period of the transmembrane pressure difference of each of the water treatment systems forward or backward so that the set value arrival period of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference prediction step does not coincide; and an operation condition adjustment information transmission step of transmitting the operation condition adjustment information generated in the operation condition adjustment information generation step to the management terminal, wherein in the chemical cleaning plan formulation step, the chemical cleaning plan is formulated using the operation condition adjustment information generated in the operation condition adjustment information generation step.

The present invention has a second characteristic feature in that: an operation information collection step of collecting operation information of a plurality of water treatment systems provided with membrane separation devices and cleaning liquid medicine inventory information in a management device; a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of each of the water treatment systems based on the operation information by a transmembrane pressure difference prediction unit provided in the management device; a chemical solution cleaning plan creating step of creating a chemical solution cleaning plan by a chemical solution cleaning plan creating unit included in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference predicting step reaches a set value; and an operation condition adjustment information generation step of generating operation condition adjustment information for adjusting forward or backward an arrival time of the set value of the transmembrane pressure difference of each of the water treatment systems so that the arrival time of the set value of the transmembrane pressure difference of each of the water treatment systems predicted by the transmembrane pressure difference prediction step does not coincide, wherein in the chemical solution cleaning plan formulation step, the chemical solution cleaning plan is formulated by taking in the operation condition adjustment information generated in the operation condition adjustment information generation step.

ADVANTAGEOUS EFFECTS OF INVENTION

As described above, according to the present invention, it is possible to provide a management device for a water treatment facility, a cleaning chemical solution ordering system for a water treatment facility, a chemical solution ordering method for a water treatment facility, and a chemical solution cleaning plan making method for a water treatment facility, which can make an appropriate cleaning timing even in an abnormal situation, and can avoid an excessive stock of a cleaning chemical solution.

Drawings

FIG. 1 is a block diagram of a cleaning chemical ordering system of a water treatment facility according to the present invention.

Fig. 2 is an explanatory view of the chemical cleaning timing and the transition of the stock of chemicals in the membrane separation device of the conventional water treatment facility.

Fig. 3 is an explanatory diagram of the chemical cleaning timing and the transition of the stock of chemicals of the membrane separation device of the cleaning chemical ordering system to which the water treatment facility of the present invention is applied.

FIG. 4 is a flowchart showing a treatment procedure of the management apparatus of the water treatment facility.

Detailed Description

The following describes a water treatment facility management device, a water treatment facility cleaning chemical solution ordering system, a water treatment facility chemical solution ordering method, and a water treatment facility chemical solution cleaning plan making method according to the present invention.

[ Structure of cleaning chemical solution ordering System for Water treatment facilities ]

As shown in fig. 1, a cleaning chemical solution ordering system 100 for a water treatment facility using a membrane separation apparatus includes: the management device 20 is configured to be able to communicate with each other via the internet, and includes a management device 20 including a server computer that centrally manages a plurality of water treatment facilities, a management terminal 1(11, 12, …, 1n) including a terminal computer provided in each water treatment facility, and a chemical solution supplier terminal 30 also including a terminal computer.

The management terminal 1 is provided at each water treatment facility, and the management terminal 1 is configured to manage operation information of the water treatment system provided with the membrane separation device, and to transmit the operation information and cleaning solution stock information to the management device 20. The chemical supply provider terminal 30 is configured to arrange the supply of the chemical to the corresponding water treatment facility based on the chemical ordering information transmitted from the management device 20. The water treatment system is a series of water treatment facilities for performing biological treatment to obtain treated water from raw water via a membrane separation device, and generally, a plurality of water treatment systems are installed in one water treatment facility, and operation information of each water treatment system is managed by one management terminal 1.

That is, the management terminal 1 includes an input interface to which detected values of sensors for monitoring operation parameters such as transmembrane pressure tmp (transmembrane pressure), membrane permeation Flux, excess sludge extraction amount, sludge circulation amount, and aeration air volume provided in each water treatment system are input, or in place of the sensors, parameters adjusted by an operator are input, in order to manage operation information of each water treatment system provided with the membrane separation device.

The parameters input via the input interface are stored as operation information in a memory provided in the management terminal 1, and the operation information and the stock information stored in the memory are output to the management device 20 via the internet. The stock information is stock information of chemical solutions stored in the cleaning chemical solution storage provided in each water treatment facility, and is the type and stock amount of the cleaning chemical solution input by the operator via the input interface.

The management terminal 1 is provided with a display unit for displaying and outputting operation parameters such as membrane permeation Flux, excess sludge extraction amount, sludge circulation amount, aeration air volume, and chemical cleaning, which are included in a chemical cleaning plan described later and transmitted from the management apparatus 20, and an operator who visually confirms the operation parameters displayed on the display unit controls the operation of the water treatment system. The management terminal may have a function of automatically controlling a part of the membrane permeation Flux, the excess sludge extraction amount, the sludge circulation amount, the aeration air volume, and the like.

The management device 20 includes: a storage unit 22, a water treatment facility information receiving unit 21, a transmembrane pressure difference predicting unit 23, a chemical solution cleaning plan making unit 24, an operation condition adjustment information transmitting unit 26, a chemical solution ordering information generating unit 27, and a chemical solution ordering information transmitting unit 28.

Each function block is configured by hardware such as a CPU board, a communication board, and a memory board constituting the server computer, and an application program for ordering the cleaning chemical to be executed by the CPU mounted on the CPU board, and the application program is stored in the memory mounted on the memory board.

The water treatment facility information receiving unit 21 is a functional block that receives operation information and cleaning solution inventory information transmitted from the management terminal 1 that manages operation information of the water treatment system in which the membrane separation device is installed via the internet as a communication medium, and stores the received operation information and cleaning solution inventory information in the storage unit 22.

The transmembrane pressure difference predicting unit is a functional block for predicting the transition of the transmembrane pressure difference TMP of each water treatment system based on the operation information stored in the storage unit 22.

The chemical solution cleaning plan making unit 24 is a functional block for making a chemical solution cleaning plan so that the chemical solution cleaning is performed before the time when the value or the change rate of the transmembrane pressure difference predicted by the transmembrane pressure difference predicting unit 23 reaches the set value.

The chemical solution ordering information generating unit 27 is a functional block for generating chemical solution ordering information based on the chemical solution cleaning plan and the cleaning chemical solution inventory information stored in the storage unit 22, and the chemical solution ordering information transmitting unit 28 is a functional block for transmitting the chemical solution ordering information generated by the chemical solution ordering information generating unit 27 to the chemical solution supplier terminal 30.

Upon receiving the chemical solution ordering information transmitted from the chemical solution ordering information transmitting part 28, the supplier terminal 30 secures a required amount of the required chemical solution to the delivery date, and performs transmission processing to the water treatment facility of the delivery destination specified by the chemical solution ordering information.

In the present embodiment, the chemical solution ordering information is transmitted from the chemical solution ordering information transmitting unit 28 to the supplier terminal 30, but the chemical solution ordering information may be transmitted from the chemical solution ordering information transmitting unit 28 to an external device other than the supplier terminal 30.

The external device is a management terminal 1, a manager terminal of the water treatment facility, a supplier terminal of the chemical liquid, and the like, and when the chemical liquid order information is transmitted to the management terminal 1, a manager of the water treatment facility provided with the management terminal 1 can request the chemical liquid supplier to make an arrangement based on the chemical liquid order information, and when the chemical liquid order information is transmitted to the manager terminal managed by the manager who has requested the management of the water treatment facility, a staff member of the manager can request the chemical liquid supplier to make an arrangement based on the chemical liquid order information.

[ interpretation of prediction of transmembrane pressure Difference and formulation of drug solution cleaning plan ]

In fig. 2, as a water treatment facility, MBR (Membrane Bioreactor) equipment including four sets of water treatment systems each including a Membrane separation device is exemplified, and a chemical cleaning time and a stock of chemicals of the Membrane separation device are shown, and the chemical cleaning time and the stock of chemicals of the Membrane separation device correspond to Membrane permeation Flux control and a transition of transmembrane pressure difference TMP (trans Membrane pressure) and an excessive rise of the transmembrane pressure difference TMP (also referred to as TMP jump) which have been conventionally performed. The horizontal axis represents the passage of time.

The apparatus is provided with a warehouse capable of storing the amount of membrane cleaning liquid medicine required for cleaning in two series of equal parts, and facilities for four days are required from ordering of the liquid medicine to delivery. The membrane permeation Flux Flux was nominally 0.5m/d, and the upper limit (which can be tolerated) was 0.8 m/d. TMP based on membrane cleaning was set to 10 kPa. Further, when Flux is operated above the upper limit or above the washing reference TMP, the membrane life is shortened.

In the first system (hereinafter, abbreviated as "first system", etc.), the chemical cleaning is performed at a time when the TMP exceeds the cleaning standard, and further, in the second system, when the chemical cleaning is performed at the first time when the TMP exceeds the cleaning standard, the stock of the chemical is exhausted, the chemical is ordered, and the chemical is put to stock four days later. During the four days, in the three-line and four-line systems, the chemical cleaning was not performed even if the TMP exceeded the cleaning standard, and the TMP increased excessively. During this period, the three-and four-systems Flux is lower than the rated value, and therefore, the Flux is temporarily set to be equal to or higher than the upper limit value in order to be complemented with the one-and two-systems Flux.

When the chemical solution is delivered, the chemical solution cleaning is performed in the third and fourth systems with time shift, and the chemical solution is ordered to further cope with the next cleaning. Thereafter, in both lines, when TMP exceeds the wash reference, occasionally TMP rises excessively due to absence of the day of rest operator. In addition, when a heavy rain occurs, if the throughput increases while the TMP of a plurality of systems exceeds the washing reference, the amount of the stock solution may be insufficient to cause a failure in the treatment.

That is, since the chemical solution is replenished and ordered at the time when the stock of the chemical solution is exhausted, when TMP jumps occur simultaneously in a plurality of systems, shortage of the chemical solution occurs to force a part of the series of membrane load operations, thereby greatly affecting the life of the membrane.

Fig. 3 shows the chemical solution cleaning timing and the transition of the stock of the chemical solution of the membrane separation apparatus in the case where the present invention is applied, that is, the generation timing of TMP jump is predicted by the transmembrane pressure difference predicting unit 23 and the chemical solution cleaning timing of each system is adjusted by the chemical solution cleaning plan preparing unit 24 so that the membrane separation apparatus is operated appropriately without causing an excess stock of the cleaning chemical solution.

When the generation timing of TMP jump in the first line is predicted by the transmembrane pressure difference predicting part 23 and then the generation timing of TMP jump in the second line is predicted, the chemical solution cleaning plan preparing part 24 prepares a first chemical solution cleaning timing at the generation timing of TMP jump and orders a chemical solution in advance in accordance with the consumption of the chemical solution in the first chemical solution cleaning timing.

Then, the transmembrane pressure difference predicting unit 23 predicts the occurrence timing of the three-line and four-line TMP jumps, and when it is predicted that the liquid medicine is insufficient at this timing, the liquid medicine cleaning plan making unit 24 makes an operation condition adjustment condition, sets the two-line liquid medicine cleaning timing before the predicted occurrence timing of the TMP jumps, and operates the three-line and four-line TMP jumps in a state where the Flux is smaller than the rated value, so that the occurrence timing of the TMP jumps is delayed.

When the transmembrane pressure difference predicting unit 23 predicts that the occurrence time of TMP hopping in the second system is the holiday, the following control is performed: the chemical cleaning timing is set to be advanced or the operation is performed in a state where Flux is smaller than the rated value based on the operation condition adjustment condition set by the chemical cleaning plan setting unit 24 so that the TMP jump occurs after the end of the holiday.

When the transmembrane pressure difference predicting unit 23 predicts that the occurrence timings of TMP jumps in the first, third and fourth systems coincide with each other, the chemical solution cleaning plan preparing unit 24 increases or decreases the Flux of each system so as to shift the occurrence timing of TMP jumps and orders the chemical solution in accordance with the prepared chemical solution cleaning timing. Further, the Flux of each system was adjusted to increase or decrease so that the total amount of the membrane permeate water of each system became the planned amount. In this example, Flux can be increased more than the rated value with a margin in the second system before the timing of generating TMP jump.

By being able to predict the occurrence of TMP jump by the transmembrane pressure difference predicting unit 23, it is possible to order a drug solution in advance to avoid shortage of the drug solution. Further, by controlling the Flux of each series based on the operation condition adjustment condition established by the chemical cleaning plan preparation unit 24, it is possible to avoid the occurrence of TMP jumps on the holidays where the staff cannot be put together, and the occurrence of TMP jumps in a plurality of series at the same time.

[ Structure of management device ]

The configuration of the management device 20 for realizing the chemical cleaning timing and the transition of the stock of the chemical in the membrane separation device shown in fig. 3 will be described in detail.

The transmembrane pressure difference predicting unit 23 performs a prediction calculation of the transition of the transmembrane pressure difference TMP for each water treatment system based on the operation information of each water treatment system. For example, the prediction operation is performed on the transmembrane pressure difference TMP after three to seven days at a frequency of four to five times a day. As the prediction arithmetic algorithm, a neural network operation, a statistical operation, or the like can be preferably used.

For example, the transmembrane pressure difference TMP can be predicted by a general multivariate analysis method using any one or a combination of the transmembrane pressure difference TMP, Flux, water temperature, aeration air volume, turbidity, treated water volume, pH, DO (Dissolved Oxygen), ORP (Oxidation-Reduction Potential), M L SS (Mixed L iquo Suspended Solids concentration), and operation time (time since the last cleaning of the chemical solution) which can be monitored from the membrane separation tank and the reaction tanks (aerobic tank, anaerobic tank, raw water tank, etc.) before and after the membrane separation tank as explanatory variables.

The operating information may be the transmembrane pressure difference, flux, water temperature, aeration air volume, turbidity, treated water volume, pH, DO, ORP, M L SS, TOC, COD, BOD, NH of the water treatment system₃Any one of these or a combination of these.

The chemical solution cleaning plan making unit 24 is provided with an operation condition adjustment information generating unit 25 for generating operation condition adjustment information for adjusting the time of arrival of the set value of the transmembrane pressure difference predicted by the transmembrane pressure difference predicting unit 23 forward or backward, and an operation condition adjustment information transmitting unit 26 for transmitting the operation condition adjustment information to the management terminal, and the chemical solution cleaning plan making unit 24 is configured to make a chemical solution cleaning plan by using the operation condition adjustment information.

The chemical solution ordering information generating unit 27 generates chemical solution ordering information so that a required amount of chemical solution necessary for a planned cleaning timing can be secured by taking the prepared chemical solution cleaning plan, the stock information of the chemical solution, and the time required until the chemical solution is shipped, and stores the chemical solution ordering information in the storage unit 22.

As a result of transmitting the operation condition adjustment information generated by the operation condition adjustment information generation section 25 to the management terminals 1 and adjusting the operation conditions of the water treatment systems of the water treatment facilities operated and managed by the respective management terminals 1, the set value arrival timing of the transmembrane pressure difference predicted by the transmembrane pressure difference prediction section 23 is adjusted forward or backward.

Then, the chemical cleaning plan preparation unit 24 prepares a chemical cleaning plan in which the operation condition adjustment information is adopted. That is, the chemical cleaning plan is made based on the transition of the transmembrane pressure TMP predicted from the new operation information, which is updated as the operation condition of each water treatment system is changed based on the operation condition adjustment information.

For example, when the operation conditions are adjusted so that the liquid chemical cleaning timing does not come on the day of rest when staff are absent, when it is predicted that the liquid chemical cleaning is not possible due to a rapid increase in the transmembrane pressure difference, and when the stock of the cleaning liquid chemical is insufficient, the operation conditions are adjusted so that the liquid chemical cleaning timing is delayed to a timing when the cleaning liquid chemical is available, and a liquid chemical cleaning plan is prepared based on the predicted value of the transmembrane pressure difference TMP as a result of the delay.

As shown in fig. 3, in a water treatment facility including a plurality of water treatment systems, the transmembrane pressure difference predicting unit 23 predicts the transition of the transmembrane pressure difference for each water treatment system, the operation condition adjustment information generating unit 25 generates the operation condition adjustment information for each water treatment system based on the transition of the transmembrane pressure difference for each water treatment system predicted by the transmembrane pressure difference predicting unit 23 so that the arrival times of the set values of the transmembrane pressure differences for each water treatment system do not coincide with each other, and the chemical solution cleaning plan making unit 24 is configured to make a chemical solution cleaning plan so as to clean each water treatment system with a chemical solution before the arrival time of the set values of the transmembrane pressure differences predicted for each water treatment system. Therefore, the stock quantity of the chemical solution can be kept to a minimum without preparing a large amount of the chemical solution in a large storage space.

The operating condition adjustment information is a target value of the operating condition for changing and adjusting the predicted value of the transmembrane pressure difference TMP obtained by the transmembrane pressure difference predicting section 23, and includes, for example, any one of a flux, an excess sludge extraction amount, a sludge circulation amount, an aeration air volume, and a chemical cleaning time. For example, by increasing or decreasing the flux of the membrane separation apparatus or increasing or decreasing the aeration air volume, the amount of fouling substances adhering to the membrane surface can be adjusted, and the change in transmembrane pressure difference can be made faster or slower, and by increasing or decreasing the excess sludge extraction amount, the BOD load can be adjusted, and the amount of fouling substances present can be adjusted.

The chemical solution cleaning plan making unit 24 is configured to determine the type of the chemical solution to be used for the chemical solution cleaning based on the inclination of the transmembrane pressure difference predicted by the transmembrane pressure difference predicting unit 23 and/or the inclination of the transmembrane pressure difference included in the operation information.

In the normal case where fouling progresses due to organic substances of the metabolic components of microorganisms due to the tendency of the transmembrane pressure difference to increase, sodium hypochlorite can be selected as the cleaning solution for the organic fouling substances.

When a behavior different from the normal state is detected, the type of the chemical solution used for cleaning can be changed to appropriately cope with the behavior. For example, if it can be determined that the membrane pressure difference is increased due to the scale derived from the inorganic component, an inorganic cleaning chemical such as hydrochloric acid, oxalic acid or citric acid can be selected as compared with the conventional tendency.

The increase in membrane pressure difference due to inorganic fouling tends to be more pronounced than in the normal case: even after the washing with sodium hypochlorite, the initial pressure is high, and the film pressure difference tends to increase greatly.

That is, the chemical solution cleaning plan making unit 24 is configured to be able to appropriately determine whether the chemical solution is a cleaning chemical solution for an inorganic scale substance, such as hydrochloric acid, oxalic acid, or citric acid, or a cleaning chemical solution for an organic scale substance, such as sodium hypochlorite, as the chemical solution to be used for the chemical solution cleaning based on the tendency of the transmembrane pressure difference predicted by the transmembrane pressure difference predicting unit 23 and/or the tendency of the transmembrane pressure difference included in the operation information.

The chemical solution ordering method of the water treatment facility of the present invention is executed by the above-described cleaning chemical solution ordering system. That is, as shown in FIG. 5, the operation information transmission step (S1), the transmembrane pressure difference prediction step (S2), and the chemical solution cleaning plan creation step (S3) are executed, in the operation information transmission step (S1), operation information and cleaning solution stock information are transmitted from a management terminal for managing operation information of a water treatment system provided with a membrane separation device to a management device via a communication medium, in the transmembrane pressure difference predicting step (S2), the transmembrane pressure difference predicting unit provided in the management device predicts the transition of the transmembrane pressure difference in the water treatment system based on the operation information, in the chemical solution cleaning plan making step (S3), a chemical solution cleaning plan is made by the chemical solution cleaning plan making unit included in the management device so that the chemical solution cleaning is performed before the time when the value or the change rate of the transmembrane pressure difference predicted in the transmembrane pressure difference predicting step reaches the set value.

Then, a step (S7) of transmitting the prepared chemical cleaning plan to the management terminal and a step (S8) of generating chemical ordering information are executed, and in the chemical ordering information generating step (S8), chemical ordering information is generated by a chemical ordering information generating unit provided in the management device based on the chemical cleaning plan and the cleaning chemical stock information.

Further, a chemical solution ordering information transmitting step (S9) of transmitting the chemical solution ordering information generated in the chemical solution ordering information generating step to an external device including a management terminal by a chemical solution ordering information transmitting unit provided in the management device, and a cleaning chemical solution transmitting process step (not shown) of transmitting the cleaning chemical solution to a water treatment facility provided in the water treatment system by a chemical solution supplier terminal based on the chemical solution ordering information received by or from the management device are performed.

The validity of the plan prepared in the chemical solution cleaning plan preparing step (S3) is evaluated (S4), and if appropriate, the chemical solution ordering information generating step (S8) is executed, and if not appropriate, the operation condition information generating step (S5) is executed. The following criteria are set for evaluation of adequacy: whether or not a proper amount of chemical is secured at the chemical cleaning timing of each of the specified systems, whether or not the specified chemical cleaning timing is a holiday such as saturday, and whether or not all of the Flux from each of the systems does not change greatly from the specified amount.

By executing the transmembrane pressure difference prediction step, the transmembrane pressure difference can be predicted, and therefore, the prediction can be effectively used for formulation of a chemical cleaning plan (for example, for ensuring personnel or for ensuring chemicals), and the operation condition can be adjusted to delay the rise time of the transmembrane pressure difference. In the case where a margin is expected for the increase in transmembrane pressure difference, the membrane filtration operation management can be effectively performed with Flux equal to or higher than the rated Flux from the viewpoints of energy saving, securing the amount of treated water, and the like.

Specifically, the required stock can be minimized by predicting the membrane differential pressure rise period and ordering the medicine in accordance with the medicine liquid cleaning period. Further, by adjusting Flux between a plurality of systems, it is possible to avoid simultaneous failure of a plurality of systems.

As an operation control method for suppressing the increase in transmembrane pressure difference, it is possible to preferably adopt an adjustment (M L SS adjustment) for reducing Flux and the sludge extraction amount, and it is sufficient to maintain M L SS high by reducing the extraction amount at the time when the sludge activity is decreased at a low water temperature when the average sludge loading amount is increased, and conversely, to shorten the SRT by increasing the extraction amount when the sludge is excessively concentrated.

Other embodiments will be described below.

In the above-described embodiment, the description has been given of the mode in which the management device constituted by the server computer collects the operation information and the chemical solution stock information from the management terminals provided in the plurality of water treatment facilities and performs centralized management, but the management terminal of each water treatment facility may be constituted as a management device that manages the water treatment facility.

That is, the management device for a water treatment facility incorporating a management terminal for managing operation information of a water treatment system provided with a membrane separation device may include: a water treatment facility information collection unit that collects operation information of a water treatment system provided with a membrane separation device and cleaning solution inventory information; a transmembrane pressure difference predicting unit that predicts a transition of a transmembrane pressure difference of the water treatment system based on the operation information; a chemical solution cleaning plan making unit that makes a chemical solution cleaning plan so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference predicted by the transmembrane pressure difference predicting unit reaches a set value; and a chemical solution ordering information generating unit that generates chemical solution ordering information based on a chemical solution cleaning plan and the cleaning chemical solution inventory information.

In this case, the management terminal executes a chemical solution ordering method including: an operation information collection step of collecting operation information of a water treatment system provided with a membrane separation device and cleaning liquid medicine inventory information in a management device; a transmembrane pressure difference prediction step of predicting transition of a transmembrane pressure difference of the water treatment system based on the operation information by a transmembrane pressure difference prediction unit provided in the management device; a chemical solution cleaning plan making step of making a chemical solution cleaning plan by a chemical solution cleaning plan making unit provided in the management device so as to perform chemical solution cleaning before a time when the value or the change rate of the transmembrane pressure difference predicted in the transmembrane pressure difference predicting step reaches a set value; a chemical solution ordering information generating step of generating chemical solution ordering information based on a chemical solution cleaning plan and the cleaning chemical solution inventory information by a chemical solution ordering information generating unit provided in the management device; a chemical solution ordering information transmitting step of transmitting the chemical solution ordering information generated in the chemical solution ordering information generating step to an external device via a chemical solution ordering information transmitting unit provided in the management device; and a cleaning chemical liquid sending process step of sending the cleaning chemical liquid to a water treatment facility provided with the water treatment system through a chemical liquid supplier terminal based on the chemical liquid ordering information received from the management terminal.

In the above-described embodiment, the water treatment facility provided with the membrane separation device is an MBR plant, but the present invention can be applied to water treatment facilities such as a water purification plant and a seawater desalination plant as long as the water treatment facility is provided with the membrane separation device.

The above-described embodiments are merely examples of the present invention, and it is needless to say that the specific configurations of the functional blocks can be appropriately modified and designed within the range in which the functions and effects of the present invention are exhibited.

Description of the symbols

1: management terminal

20: management device

21: water treatment facility information receiving unit

22: storage unit

23: transmembrane pressure difference predicting section

24: chemical cleaning plan making part

25: operation condition adjustment information generation unit

26: operation condition adjustment information transmitting unit

27: chemical solution ordering information generating part

28: chemical solution ordering information transmitting part

30: external device (liquid supplier terminal)

100: cleaning solution ordering system