JP2001081815A - Water circulation operating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently operate water by utilizing a water circulation cycle of an artificial system. SOLUTION: This apparatus includes a catchment area water supply amount estimating means 2 for estimating the area water supply amount which is the water purifying amount consumed in a catchment area by each catchment area by use of an estimating model according to the medium and long term weather forecast value, a water source storage amount estimating means 3 for estimating the storage amount of a water source by an estimating model according to the medium and long term weather forecast value, a water utilization planning means 4 for planning the amount of highly treated water treated in a sewage treatment plant to be discharged to the upstream of a river or utilized as intermediate water consumed in a catchment area according to the catchment area water supply amount estimated value estimated by the catchment area water supply amount estimating means 2 and the water source storage amount estimated value estimated by the water source storage amount estimating means 3, and information storage means 5 for storing water source information, water supply information and rainfall information required for constructing estimating models used in estimating the catchment area water supply amount and water source storage amount by the catchment area water supply amount estimating means 2 and the water source storage amount estimating means 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for performing water circulation operation in water supply and sewerage systems, and more particularly to a water circulation operation apparatus capable of operating water efficiently using an artificial water circulation cycle. .

[0002]

2. Description of the Related Art Generally, a water circulation cycle includes an artificial system and a natural system.

[0003] Among them, the artificial water circulation cycle is circulation by the forest infrastructure of water and sewage facilities.

[0004] That is, this artificial water circulation cycle produces purified water used by people in social life at a water purification plant,
In addition to supplying to consumers, after the supplied purified water is consumed by consumers, it flows into a sewage treatment plant through a sewer pipe as sewage, and the sewage treatment plant treats the sewage and discharges it to rivers. .

[0005] Also, a rainwater storage pipe is one of the facilities that plays a part of the artificial water circulation cycle, and rainwater is temporarily stored in a rainwater storage pipe from a river or sewer pipe to prevent flooding and prevent initial pollution. Part to the sewage treatment plant and part to the river.

[0006] Conventionally, sewage treated in a sewage treatment plant is utilized by utilizing these artificial water circulation cycles.
From the viewpoint of efficient use of water, some attempts have been made to reuse it as middle water.

[0007]

However, utilizing such artificial water circulation cycle, the use of middle water of treated water, advanced treatment of sewage and rainwater of rainwater storage pipes, and upstream of rivers. At present, there is no support device for efficient use of water, such as securing river flow by discharging water.

[0008] An object of the present invention is to provide a water circulation operation device capable of operating water efficiently using an artificial water circulation cycle.

[0009]

In order to achieve the above object, purified water used in a basin is produced in a water purification plant and supplied to the basin, and after the supplied purified water is consumed in the basin, the sewage is treated as sewage. In a water circulation operation device that uses a man-made water circulation cycle that flows into a sewage treatment plant, treats sewage in the sewage treatment plant, and discharges the sewage to a river, the invention according to claim 1 is based on a weather forecast value. Basin-based water supply amount prediction means for predicting the basin-specific water supply amount, which is the amount of purified water consumed in the basin, using a prediction model, based on the weather forecast value,
Water source storage amount prediction means for predicting the water source storage amount using a prediction model; water supply amount prediction value for each basin predicted by the water supply amount prediction device for each basin; and water source storage amount prediction predicted by the water source storage amount prediction means Water use planning means for planning the amount of highly treated water treated at the sewage treatment plant to be discharged upstream of the river or used as intermediate water consumed in the basin, based on the values Information storage means for accumulating water source information, water supply information, rainfall information necessary for constructing a prediction model used for prediction of the water supply amount for each basin and the water source storage amount in the prediction means and the water source storage amount prediction means, Is provided.

Therefore, in the water circulation operation device according to the first aspect of the present invention, the water source storage amount prediction means uses a prediction model constructed using water source information, water supply information, and rainfall information, based on weather forecast values. The amount of purified water consumed in each basin (water supply by basin) is predicted for each basin. The water source storage amount prediction means predicts the water source storage amount based on weather forecast values using a prediction model constructed using water source information, water supply information, and rainfall information. In the water use planning means, a water use plan such as use of intermediate water, use of highly treated water, and use of rainwater of a rainwater storage pipe is established based on the predicted water supply amount for each basin and the predicted water source storage amount.

As a result, for example, a water use plan can be made so as to minimize the amount of water discharged from the dam. Therefore, an efficient water operation for preventing the depletion of the water source by utilizing the artificial water circulation cycle. Can do it.

According to the second aspect of the present invention, the first aspect is provided.
In the water circulation operation device according to the invention, the prediction models of the water supply amount prediction means for each basin and the water source storage amount prediction means are each constructed by an autoregressive model.

Therefore, in the water circulation operation device according to the second aspect of the present invention, it is necessary to input a weather forecast value by using an auto-regression model as a prediction model of a water supply amount prediction means for each basin and a water source storage amount prediction means. Therefore, the apparatus can have a simple configuration.

Further, in the invention according to claim 3, the water supply amount by watershed prediction means for estimating the water supply amount by watershed, which is the purified water amount consumed in the watershed, using a prediction model, and the domestic wastewater amount from the watershed. Based on sewage prediction means for predicting the amount of sewage by basin using a prediction model, water supply amount prediction value by basin predicted by water supply amount prediction means by basin, and sewage amount prediction value predicted by sewage prediction means , Water use planning means for planning the amount of highly treated water treated in sewage treatment plants to be discharged upstream of rivers and used as middle water consumed in basins, water supply forecast means for each basin, and sewage prediction Means for storing water source information, water supply information, rainfall information, rainwater storage information, and sewage information required for constructing a prediction model used for predicting the water supply amount and sewage amount for each basin by means. Obtain.

Therefore, in the water circulation operation apparatus according to the third aspect of the present invention, the water source storage amount prediction means uses a prediction model constructed using water source information, water supply information, rainfall information, rainwater storage information, and sewage information. The amount of purified water consumed in each basin (water supply by basin) is predicted for each basin. The sewage prediction means includes water source information, water supply information, rainfall information, rainwater storage information,
Using a prediction model constructed using sewage information, the amount of domestic wastewater (sewage) from the basin is predicted for each basin. The water use planning means uses the water use forecast value based on the basin-based water supply amount forecast and the sewage amount forecast value so that the river discharge rate of the advanced treated water treated at the sewage treatment plant and the amount of medium water use are maximized. A plan is made.

Thus, efficient water operation can be performed by utilizing the artificial water circulation cycle.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIG. 1 is a functional block diagram showing a configuration example of a water circulation operation device in water supply and sewerage according to this embodiment.

In FIG. 1, the artificial water circulation cycle produces purified water used by humans in a basin (eg, a city) at a water purification plant and supplies it to consumers, and the supplied purified water is consumed by consumers. After that, the wastewater flows into a sewage treatment plant as sewage through a sewer pipe, where the sewage is treated and discharged into a river.

In addition, there is a rainwater storage pipe as one of the facilities that plays a part of the artificial water circulation cycle, and rainwater is temporarily stored in a rainwater storage pipe from a river or a sewer pipe to prevent flooding and prevent initial pollution. Part is discharged to a sewage treatment plant and part is discharged to a river.

Further, the wastewater treated in the sewage treatment plant is reused as intermediate water from the viewpoint of efficient use of water by utilizing these artificial water circulation cycles.

On the other hand, as shown in FIG.
Means for predicting water supply by city 2 and means for predicting water source storage 3
, Water use planning means 4 and information storage means 5.

The city-specific water supply amount prediction means 2 predicts the city-specific water supply amount, which is the amount of purified water consumed in the city, which is the basin, based on the medium- and long-term weather forecast values for each city using a prediction model.

The water source storage amount predicting means 3 predicts the water source storage amount using a prediction model based on the above-mentioned medium- and long-term weather forecast values.

The water use planning means 4 performs sewage based on the predicted value of water supply by city predicted by the water supply predicting means 2 by city and the predicted water source storage amount predicted by the water source storage predicting means 3. Plan the amount of highly treated effluent treated at the sewage treatment plant to be discharged upstream of the river or used as middle water for consumption in cities.

The information storage means 5 is necessary for constructing prediction models used for predicting the water supply amount and the water source storage amount for each city in the city-specific water supply amount prediction means 2 and the water source storage amount prediction means 3. It accumulates water source information, water supply information, and rainfall information.

Next, the operation of the water circulation operation device of the present embodiment configured as described above will be described.

In FIG. 1, the city-specific water supply amount predicting means 2 predicts, for example, a monthly city-specific water supply amount (the amount of purified water consumed in a city) on the basis of the weather forecasted in the medium- to long-term weather forecast. Done.

The prediction of the amount of water supply by city is based on past sunny weather,
Based on the ratio of cloudy days and rainy days, the following prediction model is constructed using the data (water source information, water supply information, rainfall information) of the information storage means 5 that stores the past water supply amount for each month based on the ratio of water supply on a cloudy day. It is done.

Qei (k) = a0i × F (k) + a1i × C (k) + a2i × R (k) (Equation 1) Here, Qei (k): predicted value of city-specific water supply in month k [m ³ / month]
(I = 1, 2, 3,..., N) a0i, a1i, a2i: Model constant F (k): proportion of sunny months in C C (k): proportion of cloudiness in months of month R (k): month of months The ratio n of rain represents the number of cities (the number of watersheds).

On the other hand, the water source storage amount predicting means 3 predicts the water source storage amount based on the above-mentioned medium- and long-term weather forecast values.

The prediction of the storage amount of the water source is performed by constructing the following prediction model based on the amount of rainfall (precipitation amount) falling on the water source.

Qbj (k) = Qbj (k−1) + b0j × Qaaj (k) −Qtj (k) (Equation 2) where, Qbj (k): predicted value of water source storage amount in month k [m ³ ] (J =
1, 2, 3,..., L) Qtj (k): Dam discharge in month k [m ³ ] Qaaj (k): Predicted rainfall in month k [m ³ ] (using the average value of accumulated data) b0j: Model constant (ratio of the amount of water stored in the dam to the amount of rainfall) l: Number of water sources

Next, the water use planning means 4 uses the city-based water supply amount prediction value obtained by the city-specific water supply amount prediction means 2 and the water source storage amount prediction value obtained by the water source storage amount prediction means 3. To
Plans for use of medium water, advanced treated water, and rainwater for rainwater storage pipes are made.

This water use plan is formulated and set as an optimization operation, for example, as described below.

[0036]

(Equation 1)

Constraints: (Equation 1) and (Equation 2) Qcj (k) = Qtj (k) + Qgi (k) + Qri
(K) + Qsi (k) -Qdi (k) -Qpi (k)
(River storage model) Qdi (k) = Qei (k) (Water purification plant water balance model) Qfi (k) = Qei (k) + Qhi (k) (Urban living water water balance model) Qvi (k) + Qri (k) = Qpi (k) + Qqi
(K) (rainwater storage pipe water balance model) Qgi (k) + Qhi (k) = Qoi (k) + Qfi
(K) When there is no rainwater storage pipe Qgi (k) + Qhi (k) + Qsi (k) = Qoi
(K) + Qfi (k) + Qvi (k) With rainwater storage pipe → (Sewage treatment plant water balance model) 0 <Qcj (k) ≦ Qcjmax River capacity constraint 0 <Qei (k) ≦ Qeimax Purified water production constraint 0 ≦ Qfi (k) <. Qfimax Sewage treatment amount restriction 0 ≦ Qoi (k) + Qvi (k) ≦ Qoimax Rainwater treatment amount restriction 0 ≦ Qhi (k) ≦ Qhimax Medium water usage restriction 0 ≦ Qpi (k) + Qqi (k) ≦ Qpimax Rainwater storage amount restriction Here, Qcj (k): river capacity [m ³ ] Qgi (k): discharge from the sewage treatment plant to the river [m ³ ] Qri (k): discharge from the rainwater storage pipe to the river [m ³ ] Qsi (k): Discharge rate of river water treated at the sewage treatment plant [m ³ ] Qdi (k): Water intake from river to water treatment plant or field [m ³ ] Qpi (k): Rainwater storage from river Inflow into pipe [m ³ ] Qfi (k): Amount of sewage flowing from city to sewage treatment plant [m ³ ] Qhi (k): Amount of water supply to city [m ³ ] Qvi (k): Rainwater return amount from reserve tube to sewage treatment [m ^3] Qqi ( ): Rainwater amount flowing to the rainwater reservoir pipe from the city ^{[m 3] Qoi (k)} : rainwater amount flowing from the city to the sewage treatment plant [m ^3] Qcjmax: Rivers maximum capacity [m ^3] Qeimax: purified water production maximum capacity [M ³ ] Qfimax: maximum capacity of sewage treatment [m ³ ] Qoimax: maximum capacity of rainwater treatment [m ³ ] Qhimo: maximum capacity of medium water use [m ³ ] Qpimax: maximum capacity of rainwater storage [m ³ ] p: plan start month q represents the plan end month.

By formulating in this way, the problem is solved so that the discharge from the dam is minimized. Therefore, the efficiency for preventing the depletion of the water source by using the artificial water circulation cycle is considered. Water can be used effectively.

As a method for explaining the optimization problem of the above (Equation 3), for example, there is a linear programming method in mathematical programming.

As described above, the water circulation operation device according to the present embodiment uses a prediction model constructed using water source information, water supply information, and rainfall information, and uses the prediction model based on the medium- and long-term weather forecast values in cities. In addition to predicting the amount of purified water to be consumed (water supply by city) by city, using a prediction model built using water source information, water supply information, and rainfall information, Predict the storage amount, and make a water use plan such as middle water use, advanced treatment water use, and rainwater use for rainwater storage pipes based on the predicted water supply amount for each basin and the predicted water source storage amount. Therefore, for example, a water use plan is made so that the discharge from the dam is minimized, and efficient water operation to prevent depletion of the water source by using an artificial water circulation cycle should be performed. Becomes possible.

(Second Embodiment) FIG. 2 is a functional block diagram showing a configuration example of a water circulation operation device in water supply and sewerage according to the present embodiment. The same elements as those in FIG. A description thereof is omitted, and only different portions will be described here.

That is, as shown in FIG. 2, the water circulating apparatus 1 of the present embodiment uses the prediction model of the city-specific water supply amount predicting means 2 and the water source storage amount predicting means 3 in FIG.
Each is constructed by an autoregressive model, and the input of the medium- and long-term weather forecast values to the city-based water supply amount prediction means 2 and the water source storage amount prediction means 3 is omitted.

Next, the operation of the water circulation operation device of the present embodiment configured as described above will be described.

The description of the operation of the same parts as in FIG. 1 is omitted, and only the operation of the different parts will be described here.

In FIG. 2, means for predicting the amount of water supply by city 2,
And the water source storage amount prediction means 3 uses the following autoregressive model, for example, to provide the city-specific water supply amount Qei (k),
Further, the water source storage amount Qbj (k) is predicted.

Qei (k) = a0 × Qei (k−1) + a1i × Qei (k−2) +... + A (n−1) i × Qei (k−n) (Expression 4) Qbj (k) = b0j × Qbj (k−1) + b1j × Qbj (k−2) +... + b (n−1) j × Qbj (k−n) (Expression 5) where a01, a1i, a (n−1) i: autoregressive model parameters for city-based water supply forecast b0j, b1j, b (n-1) j: autoregressive model parameters for water source storage forecast

As described above, by using the autoregressive model, there is no need to input weather information, so that the water circulation operation device has a simple configuration.

As described above, in the water circulation operation device of the present embodiment, the auto-regression models are used as the prediction models of the water supply amount prediction means 3 for each basin and the water source storage amount prediction means 4, respectively. Since there is no need to input a forecast value, it is possible to make the apparatus simple.

(Third Embodiment) FIG. 3 is a functional block diagram showing a configuration example of a water circulation operation device in water supply and sewerage according to the present embodiment, and the same elements as those in FIG. Is shown.

That is, as shown in FIG. 3, the water circulating apparatus 1 according to the present embodiment includes a city-specific water supply amount predicting unit 2, a sewage predicting unit 6, a water use planning unit 4, and an information storing unit 7. Make up.

The city-specific water supply amount prediction means 2 predicts the city-specific water supply amount, which is the amount of purified water consumed in the city that is the basin, for each city using the prediction model constructed by the autoregressive model of the above (Equation 4). I do.

The sewage prediction means 6 predicts the amount of sewage, which is the amount of domestic wastewater from the city, which is a basin, by city using a prediction model constructed by an autoregressive model.

The water use planning means 4 is a sewage treatment plant based on the city-based water supply amount predicted value predicted by the city-based water supply amount prediction means 2 and the sewage amount predicted value predicted by the sewage prediction means 6. The amount of the treated highly treated water to be discharged upstream of the river or used as intermediate water consumed in the basin is planned.

The information storage means 7 is provided with water source information and water supply information necessary for constructing a prediction model used for predicting the water supply amount and the sewage amount for each city by the city-based water supply amount prediction means 2 and the sewage prediction means 6. It stores information, rainfall information, rainwater storage information, and sewage information.

Next, the operation of the water circulation operation device of the present embodiment configured as described above will be described.

In FIG. 3, the city-specific water supply amount predicting means 2 uses the auto-regression model as shown in (Equation 4) above, and the city-specific water supply amount Qei.
The prediction of (k) is performed.

On the other hand, the sewage prediction means 6 predicts the amount of sewage, which is the amount of domestic wastewater flowing from a city to a sewage treatment plant.

The estimation of the amount of sewage is performed using an autoregressive model as described below.

Qfi (k) = c0i × Qfi (k−1) + c1i × Qfi (k−2) +... + C (n−1) i × Qfi (k−n) (Expression 6) where c0i, c1i, c (n-1) i: represent the parameters of the autoregressive model for sewage volume prediction.

Next, the water use planning means 4 performs sewage treatment on the basis of the city-based water supply amount prediction value obtained by the city-specific water supply amount prediction means 2 and the sewage amount prediction value obtained by the sewage prediction means 6. A water use plan is established so that the river discharge and the use of intermediate water at the advanced treatment water treated at the treatment plant are maximized.

To formulate this problem, the discharge of the dam:
Qtj (k) is given as a default value.

[0062]

(Equation 2)

Qcj (k) = Qtj (k) + Qgi
(K) + Qri (k) + Qsi (k) -Qdi (k)-
Qpi (k) (River storage model) Qdi (k) = Qei (k) (Water purification plant water balance model) Qfi (k) = Qei (k) + Qhi (k) (Urban living water balance model) Qvi (k) ) + Qri (k) = Qpi (k) + Qqi
(K) (rainwater storage pipe water balance model) Qgi (k) + Qhi (k) = Qoi (k) + Qfi
(K) When there is no rainwater storage pipe Qgi (k) + Qhi (k) + Qsi (k) = Qoi
(K) + Qfi (k) + Qvi (k) With rainwater storage pipe → (Sewage treatment plant water balance model) 0 <Qcj (k) ≦ Qcjmax River capacity constraint 0 <Qei (k) ≦ Qeimax Purified water production constraint 0 <Qfi (k) ≦ Qfimax Sewage treatment amount restriction 0 ≦ Qoi (k) + Qvi (k) ≦ Qoimax Rainwater treatment amount restriction 0 ≦ Qhi (k) <Qhimax Medium water consumption restriction 0 ≦ Qpi (k) + Qqi (k) ≦ Qpimax Rainwater storage amount constraint As described above, in the water circulation operation device of the present embodiment,
Using a prediction model built using water source information, water supply information, rainfall information, rainwater storage information, and sewage information, the amount of purified water consumed in cities (water supply amount by city) is predicted for each city, and the water source information, Using a prediction model constructed using water supply information, rainfall information, rainwater storage information, and sewage information, the city estimates the amount of domestic wastewater (sewage amount) by city, and estimates the water supply amount by city and sewage amount. Based on the predicted values, the water use plan is designed to maximize the river discharge and the amount of intermediate water used in the highly treated sewage treated at the sewage treatment plant. Utilization can be used for efficient water operation.

(Other Embodiments) (a) In each of the above embodiments, the case where the present invention is applied to the water circulation operation device that performs the monthly water circulation operation has been described. However, the present invention is not limited to this. The present invention can be similarly applied to a water circulation operation device that operates, and the same operation and effect as those described above can be obtained.

(B) Not only effectively utilizing the artificial water circulation cycle but also utilizing the natural water circulation cycle (for example, when rainfall penetrates underground and becomes groundwater, this groundwater is used for agricultural land water). , Etc.), it is possible to apply a more efficient water circulation operation device.

[0066]

As described above, according to the water circulation operation device of the present invention, the artificial water circulation cycle is utilized.
Water can be operated efficiently.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a first embodiment of a water circulation operation device according to the present invention.

FIG. 2 is a functional block diagram illustrating a water circulation operation device according to a second embodiment of the present invention.

FIG. 3 is a functional block diagram showing a third embodiment of the water circulation operation device according to the present invention.

[Description of Signs] 1 ... Water circulation operation device 2 ... Water supply amount prediction means by city 3 ... Water source storage amount prediction means 4 ... Water use planning means 5 ... Information storage means 6 ... Sewage prediction means 7 ... Information storage means.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yoshikazu Tonozuka 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in Fuchu factory, Toshiba Corporation (Reference) 2D063 AA09

Claims (3)

[Claims] 1. Purified water used in a basin is produced in a water purification plant and supplied to the basin. After the supplied purified water is consumed in the basin, the purified water flows into a sewage treatment plant as sewage, and the sewage is treated in the sewage treatment plant. In a water circulation operation device that operates water using an artificial water circulation cycle that processes water and discharges it to a river, based on weather forecast values, a prediction model of water supply by watershed, which is the amount of purified water consumed in the watershed, based on weather forecast values Watershed-based water supply amount predicting means for estimating for each watershed using, based on the weather forecast value, water source storage amount estimating means for estimating a water source storage amount using a prediction model, and the watershed-based water supply amount estimating means Based on the predicted basin-based water supply amount predicted value and the water source storage amount predicted value predicted by the water source storage amount prediction means, the highly treated water treated in the sewage treatment plant is discharged upstream of the river. , The basin Water use planning means for planning the amount of medium water to be consumed in the basin, and used for prediction of the water supply amount for each basin and the storage amount of the water source in the water supply amount prediction means for each basin and the water source storage amount prediction means. An information storage means for storing water source information, water supply information, and rainfall information necessary for constructing a prediction model. 2. The water circulation operation device according to claim 1, wherein the prediction models of the water supply amount prediction means for each basin and the water source storage amount prediction means are each constructed by an autoregressive model. . 3. A purified water used in a basin is produced in a water treatment plant and supplied to the basin, and the supplied purified water is consumed in the basin, flows into a sewage treatment plant as sewage, and is treated by the sewage treatment plant. In a water circulation operation device that operates water using an artificial water circulation cycle that processes water and discharges it to a river, a water supply amount for each watershed, which is a purified water amount consumed in the watershed, is predicted for each watershed using a prediction model. Water supply amount prediction means by basin, sewage prediction means for predicting sewage amount, which is domestic wastewater amount from the basin, by basin using a prediction model, water supply amount prediction value by basin predicted by the water supply amount prediction means by basin And advanced wastewater treated in the sewage treatment plant, based on the wastewater amount predicted value predicted by the wastewater prediction means, and discharged to the upstream of the river or used as intermediate water consumed in the basin. Water use planning means for planning the amount of water supply, water source information required to build a prediction model used for prediction of water supply amount and sewage amount by basin in the basin-based water supply amount prediction means and sewage prediction means, Water supply information,
A water circulation operation device comprising: an information storage unit that stores rainfall information, rainwater storage information, and sewage information.