JPH0947749A - Local water purification system and method, and purification device - Google Patents

Abstract

(57) [Summary] [Objective] The object of the present invention is to provide a lake, which is the water source of the water purification plant,
It is an object of the present invention to provide a local water purification system capable of separating and removing pollutants in a closed water area such as a pond or a dam lake to improve water quality and supply high quality water to a water purification plant. [Constitution] In the present invention, a part of a closed water area 6 including a water intake 2 of a water purification plant 1 is divided into treated water areas 7 by partitioning devices 14, 14.
After partitioning by t, 14x, 14y, at least the water in this treated water area 7 is purified by separating and removing pollutants such as eutrophication substances and algae by the purifying devices 11, 11 ', 12 and returning to the original treated water area 7. It is a local water purification system configured to release. Further, the present invention is directed to the fence 2 along the passage 35.
Contaminant removal device 4 with a simple structure in which only 4 to 27 are lined up
1 is configured to separate and remove contaminants.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for purifying closed water bodies such as lakes and dams, and more particularly to a technique for purifying closed water bodies for tap water sources.

[0002]

2. Description of the Related Art In recent years, in the closed water areas such as lakes and dams, which are the water sources of water purification plants, the inflow of eutrophication such as nitrogen and phosphorus has increased, and eutrophication phenomenon in which a large amount of algae is generated has progressed. I'm out. There are many proposals for such purification technology for closed water areas.
Classified into technologies for mechanically removing contaminants, technologies for activating microorganisms, technologies for chemically treating with chemicals, and technologies for circulating a portion of water in closed water areas. To be done. For example, as prior art 1, in Japanese Patent Application Laid-Open No. 2-95498, a water treatment method and apparatus for eutrophication of a closed water area, which is a treatment step and treatment apparatus for removing algae generated with eutrophication And a treatment step and a treatment apparatus for performing treatment with an anaerobic microorganism, a treatment step and a treatment apparatus for performing treatment with an aerobic microorganism, and a treatment step and a treatment apparatus for removing residual phosphorus by chemical treatment. A water treatment method and apparatus is described. Further, as the prior art 2, Japanese Patent Laid-Open No. 5-2
In Japanese Patent Publication No. 87, a glove with a bubble collecting device, in which a plurality of gutters having a concave cross section with an open upper portion are juxtaposed at appropriate intervals on the inner water surface of a catamaran type boat, is provided on each gutter side. The ends are slightly above the water surface and adjustably connected to the water level, and the bubble recovery device is equipped with a bubble generating device to generate bubbles from under the water in the rack, and the recovery of the bubbles that have entered each trough. There is described a polluted water purifying device which is provided with a means and is mainly used for purifying the water quality of the water by removing suspended matter in the water of closed water such as the sea and lakes.

[0003]

[Problems to be Solved by the Invention] In a closed water area such as a lake, a dam, etc., which is the water source of a water purification plant, tap water whose source is the closed water area is a purification facility due to the progress of eutrophication phenomenon. There is a need to increase the water treatment plant.
However, it is expected that the eutrophication phenomenon in closed water areas will continue to progress in the future, and it is the current situation that it cannot be dealt with only by strengthening the water purification plant, and the water sources of the water purification plant such as lakes and dams are closed. It is desired to improve the water quality of natural waters. However, the above-mentioned prior arts 1 and 2 cannot sufficiently deal with the eutrophication phenomenon in the closed water area which is the water source of the water purification plant, and therefore the purification treatment amount in the water purification plant cannot be significantly reduced. Is to have.

The prior art 1 also has a problem that large-scale equipment must be installed.

In order to solve the above-mentioned problems of the prior art, an object of the present invention is to solve the eutrophication phenomenon due to pollutants in a closed water area such as a lake, dam lake, etc. (EN) Provided is a local water area purification system and method capable of supplying a large amount of improved treated water to a water purification plant to significantly reduce the amount of purification treatment in the water purification plant. Another object of the present invention is to efficiently separate contaminants such as eutrophication substances and algae in the water to be treated by a simple device or system in closed water areas such as lakes and dams that are the water source of the water purification plant. It is an object of the present invention to provide a local water area purification system and method capable of supplying treated water that has been removed and purified to a water purification plant. Another object of the present invention is to provide a purifying device and a pollutant removing device that efficiently separate and remove pollutants such as eutrophication substances and algae in the water to be treated with a simple device.

[0006]

In order to achieve the above object, the present invention divides a treated water area by partitioning it in the depth direction so as to surround at least a part of a closed water area such as a lake, a dam lake or the like which is a water source. A partition object or partition device to be formed, and a purifying device that takes in water in the closed water area or treated water area to separate and remove contaminants existing in the water, and discharges the separated and removed treated water to the treated water area. A local water area purification system comprising: a water purifying apparatus for collecting water in the treated water area that has been purified by the purification apparatus to a water purification plant.

Further, the present invention is characterized in that, in the above-mentioned purification device in the above-mentioned local water purification system, a rich nutrient or algae is contained as a contaminant to be separated and removed. Further, the present invention is characterized in that the purification device in the local water purification system is installed in the closed water area or the treated water area. Further, the present invention is, in the local water purification system, the purification device, a pump for taking in water of the closed water region or the treated water region, the water taken by the action of this pump is brought into contact with the filter. It is characterized by comprising a filter tank for purifying and discharging treated water, and a settling tank for settling suspended substances existing in the treated water discharged from the filter tank. Further, according to the present invention, in the local water area purification system, the purification apparatus includes a power source for driving the pump. The present invention also provides
The power source includes a solar power generation panel and a power storage device that stores electricity obtained from the solar power generation panel. Further, the present invention is characterized in that, in the local water purification system, an auxiliary passage is formed in an upper portion of the partition object or the partition device, through which contaminants processed by the purification device flow. Further, the present invention is characterized in that, in the local water purification system, the purification device is floated in the closed water area.

The present invention also provides a partitioning object or partitioning device for partitioning at least a part of a closed water area such as a lake or dam, which is a water source, in the depth direction so as to form at least a part of a treated water area, Intake means for taking in water in the closed water area or treated water area, and filtration means for contacting and purifying the treated water taken by the intake means with a filter material and discharging or flowing out, and discharging from the filtering means And a sedimentation means for settling floating substances existing in the treated water that has flowed out, wherein contaminants existing in the treated water that has been taken in are separated and removed by the filtration means and the sedimentation means to treat the treated water. A local water purification system, comprising: a purification device configured to be discharged or discharged into a water area, and configured to take water in the treated water area purified by the purification device to a water purification plant. It is a non-and a method thereof.

The present invention also provides a partitioning object or a partitioning device that partitions at least a part of a closed water body such as a lake or a dam lake, which is a water source, in the depth direction to form at least a part of a treated water body, Water intake means for taking in water in the closed water area or treated water area, settling means for settling floating substances present in the treated water taken by the water intake means, and treated water treated by the settling means And a filtering means for purifying the treated water by contacting with the material to release or discharge the treated water. The treated water is separated and removed by the sedimentation means and the filtering means existing in the water to be treated. A local water purification system comprising: a purifying device configured to be discharged or discharged into a treated water region, and configured to take water in the treated water region purified by the purifying device to a water purification plant. Beauty is that way. The present invention also provides
Precipitation means for sedimenting suspended solids present in the treated water that is taken in or flowing in from closed water areas such as lakes and dams that are water sources, and the treated water treated by the sedimentation means is contacted with a filter to purify And a discharge means for discharging or discharging the treated water, wherein contaminants existing in the water to be treated are separated and removed by the precipitation means and the filtering means, and purified treated water is discharged or discharged to the treated water area. A local water area purification system and a method thereof, comprising the purification device configured as described above, and configured to take the treated water purified by the purification device to a water purification plant. In addition, the present invention is a lake, which is a water source,
Filtering means that purifies treated water that is taken in or flowing in from a closed water area such as a dam lake by contacting with a filter and discharges or discharges it, and settles suspended substances existing in the treated water purified by the filtering means And a purifying device configured to discharge or outflow the treated water purified by separating and removing the contaminants existing in the water to be treated by the filtering means and the sedimenting means. A local water area purification system and a method thereof, wherein the treated water purified by the purification apparatus is configured to be taken into a water purification plant.

Further, the present invention is characterized in that, in the local water area purification system, a fluidized bed type filtration tank is used as a filtration means of the purification apparatus. Further, in the present invention, in the local water purification system, as a filtering means of the purification device, due to a head pressure difference, an ascending flow of the water to be treated discharged to the bottom of the filter tank filled with the filter medium is brought into contact with the filter medium. It is characterized in that it is configured to occur.
Further, the present invention is characterized in that, in the local water purification system, the purification device is configured to float in the closed water. Further, the present invention, in the local water purification system, as the filtering means of the purification device, the treated water is allowed to pass while being in contact with a filter medium such as charcoal, and at the same time, decomposing ammoniacal nitrogen in the treated water into nitric acid. It is characterized in that it is configured to be converted into nitrogen. Further, in the present invention, in the local water purification system, as a sedimentation means of the purification device, an upward flow is generated from the flow along the bottom of the water to be treated, and the suspended matter is sedimented and removed by the centrifugal force of this flow. It is characterized in that it is configured to. Further, the present invention is, in the above-mentioned local water purification system, as a settling means of the above-mentioned purification apparatus, an ascending flow is generated from a flow along the bottom of the water to be treated, and a floating substance is settled and deposited by centrifugal force due to this flow. It is characterized in that it is configured to collect the sludge accumulated by removing the sludge.

The present invention is also provided with a partitioning object for partitioning at least a part of a closed water area such as a lake or dam, which is a water source, in the depth direction to form a treated water area, and a partition object installed in the treated water area. A purification device having a filter tank for separating and removing contaminants existing in water taken from the treated water area by contacting with a filter, and discharging the treated water treated in the filter tank to the treated water area. A local water area purification system and a method thereof, characterized by being configured to take in water in the treated water area purified by the purification apparatus to a water purification plant. In addition, the present invention is a method of flowing water to be treated along a flow path formed in a closed water area such as a lake or a dam, which is a water source, and partitioning it in the depth direction so as to surround at least a part of the water. A partition body that forms at least a part of the treated water area and has a contaminant removal function, an algae removal device that removes algae present in the water of the treated water area, and algae removed by the algae removal apparatus A local water purification system and method comprising a purifying device for purifying the treated water by passing the treated water into the water purification plant. is there.

Further, the present invention is characterized in that, in the system for purifying local water, the purifying device is formed by installing a cloth-like, lattice-like, or net-like filter material at a desired portion of a flow path. Further, the present invention is a partitioning device having a contaminant removing function as well as partitioning in the depth direction so as to surround at least a part of a closed water area such as a lake or a dam that is a water source,
A water intake pipe that pumps water from the treated water area to the water treatment plant, an algae removal device that exists between the water intake pipe and the partitioning device, and removes algae from the water in the treated water area, and this algae removal device And a non-woven fabric purifying device for purifying water in a treated water region with a non-woven fabric, which is provided between the water intake pipe and the water intake pipe. Further, the present invention provides a first passage forming means (first fence) having a passage through which the water to be treated flows, and a passage through which the water to be treated flows in, and a passage of the first passage forming means. Second passage forming means (second fence) for changing the flow of the water to be treated flowing through the bottom through the upward flow into an upward flow, and causing a centrifugal force based on the flow to settle suspended solids and deposit the sludge as sludge on the bottom. ), And third passage forming means (third fence) having the passage at the bottom by further guiding the water to be treated flowing through the passage provided at the upper part of the second passage forming means to the bottom.
And a filtering means configured to convert ammonia nitrogen in the water to be treated into nitrate nitrogen by aerating the water to be treated flowing through the passage of the third passage forming means through a filter medium layer such as charcoal. Is installed along the above-mentioned flow path, and is a contaminant removal device characterized by the above-mentioned.

Further, according to the present invention, there is provided a first passage forming means for forming a flow path for the water to be treated in a closed water area such as a lake or a dam lake, which is a water source, and having a passage for allowing the water to be treated to flow into the bottom portion. (First fence), and the flow of the water to be treated along the bottom flowing through the passage of the first passage forming means is changed to an upward flow, and the suspended matter is settled by the centrifugal force based on this flow. Second passage forming means (second fence) for depositing sludge on the bottom, and water to be treated flowing through the passage provided at the upper part of the second passage forming means further guided to the bottom so as to have a passage at the bottom. The passage forming means (third fence) and the water to be treated flowing through the passage of the third passage forming means are aerated through a filter medium layer of charcoal or the like, so that ammoniacal nitrogen in the water to be treated is converted into nitric acid. I'll convert it to nitrogen It is the local water purification system, characterized in that the filtering means arranged with a contaminant removal device constructed and placed along the flow path.

Further, the present invention is characterized in that, in the pollutant removing device in the local water purification system, a collecting means for collecting the sludge accumulated on the bottom portion by the second passage forming means is installed. Further, the present invention is a partitioning device that partitions at least a part of a closed water area such as a lake or a dam lake as a water source so as to surround at least a part of the closed water area to form at least a part of the treated water area, and the treated water area to the water treatment plant. The intake pipe installed in the treated water area for pumping up the water and the water in the water area outside the treated water area are taken in to separate and remove the contaminants present in the taken water, and the separated and removed treated water is A local water area purification system, comprising: a purifying device that discharges the treated water area. Further, the present invention is a water body partitioning body that partitions in the depth direction so as to surround at least a part of a closed water body such as a lake or a dam that is a water source, and connects a plurality of partitioning bodies with a chain in a blind shape, A water-area partitioning object, characterized in that an opening through which water in a water area outside the treated water area is formed is formed in a part of the water-shaped partitioning object, and the buoy is used to hold the blind-shaped partitioning object in water. .

Further, the present invention comprises one or more partitioning devices for partitioning at least a part of the closed water area in the depth direction, and an intake pipe installed in the treated water area for pumping the water of the treated water area to a water treatment plant, A purification device that takes in water in the closed water area, separates and removes contaminants existing in the taken-in water, and releases treated water from which the contaminants have been separated and removed between the partition device and the intake pipe. It is a local water area purification system characterized by having and. Further, the present invention provides a diffusing pipe at the bottom of the water so as to surround at least a part of the closed water area, a partition means for generating bubbles from this diffusing tube and constituting at least a part of the treated water area, and a treatment means to the water treatment plant of The intake pipe installed in the treated water area for pumping water and the water in the closed water area are taken in to separate and remove the pollutants present in the taken water, and the treated water from which the pollutant is separated and removed is It is a local water area purification system provided with the purification device which discharges to the above-mentioned treated water area.

Further, according to the present invention, in a closed water area such as a lake or a dam lake, which is a water source, the treated water purified by separating and removing contaminants existing in the water to be treated is discharged to the partitioned treated water area, A method for purifying a local water area, characterized in that the treated water in the treated water area is supplied to a water purification plant through a water pipe. The present invention also provides a pump for taking in water for purification, a filter tank filled with a filter medium for purifying the water to be treated taken in by this pump, and a discharge for releasing the treated water purified by the filter tank. And a settling tank for settling and removing suspended solids in water on the downstream side of the discharge section. Further, the present invention is the above-mentioned local water area purification system and method, wherein the volume of the treated water area is 2 to 3 times the daily water intake amount, and the daily treatment capacity of the purification device is the daily water intake amount. It is characterized in that it is 1/2 to 1/3.

[0017]

[Advantage] With the above structure, in a closed water area such as a lake, a dam lake, etc., which is the water source of the water purification plant, the concentration of inflowing nutrients becomes high, and a eutrophication phenomenon occurs in which a large amount of algae and the like occur, and this large The generated algae die and accumulate in the bottom mud,
In the bottom mud, the decomposition of algae killed by the action of microorganisms occurs, and the nitrogen component is eluted in water in the form of ammonia nitrogen.
It can be prevented from being directly supplied to the water purification plant. Therefore, the concentration of ammonia nitrogen contained in the water supplied from the treated water area to the water purification plant in the above closed water area is significantly reduced, and the amount of chlorine for disinfection input in the water purification plant is significantly reduced, resulting in residual chlorine. The generation of carcinogenic substances such as trihalomethane, which are formed by the combination of the organic substances with organic substances, can be almost eliminated. Also, from the closed water area, it is possible to solve the eutrophication phenomenon due to pollutants and supply a large amount of treated water with significantly improved water quality to the water treatment plant, so the amount of purification treatment at the water treatment plant is greatly reduced. can do.

Further, with the above-mentioned constitution, in a closed water area such as a lake, a dam lake or the like which is the water source of the water purification plant, a simple device or system can efficiently separate and remove eutrophication substances and pollutants such as algae in the water to be treated. The purified treated water can be supplied to the water purification plant. Further, according to the above configuration,
It is possible to realize a purifying device and a pollutant removing device that efficiently separate and remove pollutants such as eutrophication substances and algae in the water to be treated with a simple device. Further, with the above configuration, by installing a purifying device or the like along the flow path formed in the closed water area or floating in the closed water area,
There is no need to secure an installation site (installation space) on land. Further, with the above-mentioned configuration, the flow of the water to be treated is caused by the head pressure difference or the natural flow in the purifying device and the like, so that the power for flowing the water to be treated is not required, and the structure can be simplified. Costs, operating costs, and maintenance costs can be reduced.

Further, since the electric power of the pump or the like is obtained from the solar power generation panel, it is not necessary to supply the electric power.
In addition, because the treated water area is formed by partitioning closed water areas such as lakes and dams, which are the water sources of the water treatment plant, with a partitioning device, it is possible to limit the amount of water in the treated water area, and even a purification apparatus with a small treatment capacity is sufficiently rich. Treated water purified by separating and removing pollutants such as nutrients and algae can be discharged or discharged into the treated water area and stably supplied to the water purification plant. Also, because the treated water area was formed by partitioning closed water areas such as lakes and dams, which are the water sources of the water treatment plant, with partitioning devices, the water in the treated water area will be in a stable state and the distribution position of pollutants within the treated water area will be determined. The efficiency of uptake of contaminants in the purification device can be increased.

Further, treated water purified by separating and removing sufficiently eutrophication substances and pollutants such as algae can be treated for a while (about 1
By staying in the treated water area, contaminants that could not be completely treated by the purification equipment will be absorbed by microorganisms in the water, and the microorganisms will be absorbed for about 1 to 2 days. It can be purified by sedimentation after the end of its life cycle. Further, since the pollutant removing device is configured by installing the first to third passage forming means (first to third fences) and the filtering means along the flow path, the water in the treated water area can be preliminarily obtained. Pollutants can be removed, and the amount of purification in the treated water area can be greatly reduced.

[0021]

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

One embodiment of the local water purification system according to the present invention will be described with reference to FIGS. 1 to 9. FIG. 1 is a view of a closed water area such as a lake, a dam lake or the like, which is a water source to the water purification plant (water treatment plant), seen from above. 6 is a water purification plant (water treatment plant) 1
Indicates a closed water area such as a lake, dam lake, etc. A large amount of water will be stored in the closed water area 6 such as the lake or dam. 1 shows a water purification plant (water treatment plant). Two
Is a water intake to the water treatment plant 1, and a water pipe 5 to the water treatment plant 1.
Connected. Reference numeral 3 indicates a breakwater. 4 indicates land. And closed water areas such as lakes and dams that are water sources 6
In (7, 8), the inflow of rich nutrients such as nitrogen and phosphorus has increased recently, a large amount of algae is generated, and many pollutants are present. Therefore, it is necessary to purify the water containing a large amount of pollutants (rich nutrients (rich nutrient elements), algae, etc.) from the intake port 2 so as not to be supplied to the water purification plant 1. For that purpose, the treated water area 7 around the intake 6 is
It is necessary to partition by the partition device 14 to which the buoy 15 is attached to purify the water in the treated water area 7. Then, the partitioning device 14 may be installed so that the volume of the treated water area 7 partitioned by the partitioning device 14 is about 2 to 3 times the daily intake amount of water taken from the water intake 2 to the water purification plant 1. In any case, by partitioning the treated water area 7 by the partitioning device 14 in the closed water area 6, the water containing a large amount of pollutants enters the treated water area 7 from the water area 8 outside the treated water area 7 and enters the treated water area 7. It is possible to keep the water in the treated water area 7 in a purified state by minimizing the mixing with the purified water in (1).

By the way, when the partitioning device 14 can prevent a large amount of the pollutants from entering the treated water area 7 from the outside, the purifying devices 11 and 12 mainly separate and remove the pollutants in the treated water area 7. Then, the purified treated water may be discharged into the treated water area 7. Further, a purification device for separating and removing pollutants existing in the water area near the outside of the partitioning device 14 and discharging purified water into the treated water area 7 (see FIG. 4).
11b and 11c. ) May be installed. By doing so, it is possible to make more purified water in the treated water area 7, release it, and retain it. The amount of water that can be treated by the purification devices 11 and 12 is 100% of the daily intake amount.
To about 70%. Further, the purification devices 11 and 12
In FIG. 1, the case where it is floated and installed in the treated water area 7 is shown, but it may be fixed to the bottom of the water in the treated water area 7, and the pipe becomes slightly longer, but It may be floated in the outer water area 8 or fixedly installed at the bottom of the water, and may be installed on the land 4 although the pipe is long. When the purifiers 11 and 12 are installed in the water bodies 7 and 8, it is necessary to enable the pollutants separated and removed to be recovered to the land. Further, when the purification devices 11 and 12 are installed in the water areas 7 and 8 in a floating state, they can be brought close to the land for maintenance.

Since one of the above pollutants, such as nitrogen and phosphorus, is a leaching component from the bottom of the water, it has a high concentration near the bottom of the water and its concentration becomes lower as it approaches the water surface. Therefore, in order to separate and remove the above-mentioned eutrophication substances (eutrophication elements) by the eutrophication substance purification device 11, the intake port of the eutrophication substance purification device 11 is installed in the vicinity of the bottom of the water to provide a high concentration of eutrophication substances. Can be directly handled, and purification efficiency can be increased. Similarly, for floating algae, a high-concentration region is formed near the water surface. Therefore, the algae can be removed with high efficiency by installing the intake port of the algae purifying device (algae removing device) 12 for separating and removing these algae near the water surface. That is, the purifying device 12 is a device that separates and removes algae or the like by absorbing with microorganisms by filtering with a filter medium.

As described above, most of the pollutants are removed by the purification devices 11 and 12, but the purification device 1
The treatable water amounts of 1 and 12 are about 100% to 70% of the daily intake amount, and not all pollutants are removed. However, pollutants that are not removed by the purifiers 11 and 12 are absorbed by microorganisms by staying in the treated water area 7 for a while (about 2 to 5 days), and the microorganisms complete their life cycle within a few days and settle down. Will be done. Therefore, the pollutant is less likely to be taken from the water intake 2 to the water purification plant 1. In any case, the purification device 1
Purified treated water from which contaminants such as nutrients and algae have been separated and removed by 1 and 12 is stored in the treated water area 7 and supplied to the water purification plant 1 through the water supply pipe 5. Therefore, the ammonia nitrogen component contained in the treated water constantly supplied to the water purification plant 1 can be greatly reduced, and the water treatment in the water purification plant 1 can be greatly reduced.
As the partition device 14, a resin sheet or net is used. The partitioning device 14 does not need to be shut off so that water hardly enters and exits, and a large amount of pollutants from the water area 8 outside the treated water area 7 enter the treated water area 7 to be purified in the treated water area 7. It is enough to be able to prevent some mixing with water. Conversely, the partition device 14
By allowing a small amount of water to flow in and out, the external force to the partitioning device 14 due to the blowing flow is mitigated, and the outflow of the partitioning device 14 can be prevented.

Next, the purifying device 11 will be specifically described. That is, FIG. 2 is an external perspective view showing a fluidized bed type purification apparatus which is one embodiment of the purification apparatus 11, and FIG.
It is a vertical side view of the fluidized bed type purification apparatus shown in FIG. The fluidized bed type purification apparatus 11 ′, which is an example of the purification apparatus 11, is
Floats 46a to 46c connected in a U-shape are provided so that they can float in the closed water area 6 (7, 8). In addition, when fixing to the water bottom in the closed water area 6 (7, 8), a pile may be provided and supported instead of the floats 46a to 46c. When the fluidized bed purification apparatus 11 'is installed on the land 4, the floats 46a to 46c are unnecessary. However, the fluidized bed type purifying apparatus 11 ′ is attached to the float 46 a.
By floating in the closed water area 6 (7, 8) at 46c, it can be easily moved and fixed on the water in the closed water area 6, and the intake port 44 can be positioned according to the generation status of pollutants. It can be turned on and brought close to the land for maintenance. In addition, the fluidized bed type purifying apparatus 11 ′ is provided with the floats 46a to 46c to close the closed water area 6 (7,
8) By floating in the inside, a fluidized bed type purification device 1
The pipe can be shorter than the case where 1'is installed on land, and it is not necessary to secure a space for installing the fluidized bed purification apparatus 11 'on land.

The fluidized bed type purifying apparatus 11 'mainly has a fluidized bed type filtration tank 42 filled with a filter medium 49, is guided by a water guiding pipe 48, and is branched at a lower end of the water guiding pipe 48 by a head difference. The water to be treated blows out from the bottom by a plurality of pipes 56 and flows with the filter material 49 to form a fluidized bed, which comes into contact with the filter material 49 to separate and remove contaminants such as eutrophic substances. However, as shown by the arrow, it rises and is discharged from the discharge pipe 52 as purified treated water. Note that, in FIG. 3, in consideration of the case where the depth in the closed water area 6 is shallow, the substantial length of the filtration tank 42 is lengthened by forming the filtration tank 42 in a plurality of stages. The filter medium 49 is formed of an ore such as zeolite and a plastic filter medium. Further, the fluidized bed purification apparatus 11 ′ is provided with a settling tank 51 for once receiving the treated water from the discharge pipe 52 and precipitating and removing the suspended matter contained in the treated water. Then, the treated water from which the suspended solids are removed by sedimentation in the sedimentation tank 51 is discharged into the discharge pipe 53.
Is discharged (discharged) into the treated water area 7. Further, in the fluidized bed type purification apparatus 11 ′, the treated water containing pollutants such as eutrophication substances (eutrophication elements) existing in the vicinity of the bottom of the water is taken (inflowed) from the water intake port 44, and the treated water of the water conduit 48 is introduced. A pipe 59 leading to the upper end and a submersible pump 45 are provided.
Further, a power supply for supplying electric power to the submersible pump 45 and the like and a control device 47 for controlling the submersible pump 45 and the like are provided. The power source is composed of, for example, a solar power generation panel 43, which is a power generation by sunlight, and a power storage device that stores the power generated by the solar power generation panel 43.

Next, a fluidized bed type filtration tank 4 formed in a plurality of stages
No. 2 will be described with reference to FIG. That is, as will be described in detail with reference to FIG. 3, the fluidized bed type filtration tanks 42a to 42c are composed of, for example, three stages connected in series, and the fluidized bed type filtration tanks 42a to 42c are installed at their lower portions. The floats 46a to 46c are arranged and supported side by side so as to be submerged in the water. The water level of each of the fluidized bed type filtration tanks 42a to 42c is higher than the water surface of the floating water area, and the upper part of the first fluidized bed type filtration tank 42a is the second fluidized bed. Is higher than the upper part of the second type fluidized bed type filter tank 42b, and the upper part of the second stage fluidized bed type filtered tank 42b is the third stage fluidized bed type filtered tank 42c.
It is higher than the top. Therefore, the treated water 57 drawn by the submersible pump 45 is supplied to the lower part of the fluidized bed type filtration tank 42a of the first stage by the water conduit 48a, and the height of each fluidized bed type filtration tank 42a to 42c is increased. The first head fluidized bed type filtration tank 42a, the second head
The fluidized bed type filtration tank 42b of the second stage and the fluidized bed type filtration tank 42c of the third stage flow in this order.

The water to be treated 57, which has been pumped up to the first-stage fluidized bed type filtration tank 42a by the submersible pump 45, is a water conduit 48a extending from the upper part to the lower part of the first staged fluidized bed type filtration tank 42a. Through a plurality of pipes 56a branched at the lower end of the water conduit 48a to be discharged to the lower part of the first-stage fluidized bed type filtration tank 42a. The water to be treated discharged to the lower part of the first-stage fluidized bed type filtration tank 42a is
In the fluidized bed type filter tank 42a of the second stage, the fluidized bed is formed by flowing with the filter medium 49a to be purified while being in contact with the filter medium 49a, and indicated by an arrow by the head pressure between the water conduit 48a. As described above, and passes through the discharge pipe 50a formed in the upper part of the first-stage fluidized bed type filtration tank 42a, and the introduction pipe 48b of the second-staged fluidized bed type filtration tank 42b.
Is supplied to the inlet part (upper end part) of the. The supplied water to be treated reaches the lower part through the water guiding pipe 48b extending from the upper part to the lower part of the fluidized bed type filtration tank 42b of the second stage, and reaches the lower part, and a plurality of pipes branched at the lower end of the water guiding pipe 48b. It is discharged from 56b to the lower part of the second fluidized bed type filtration tank 42b. The water to be treated discharged to the lower part of the second-stage fluidized bed type filter tank 42b flows between the second stage fluidized bed type filter tank 42b and the filter medium 49b to form a fluidized bed. It is formed and purified while contacting with the filter medium 49b, and the water conduit 48
As shown by the arrow, the pressure gradually rises due to the head pressure between the fluid b and b, and passes through the discharge pipe 50b formed in the upper part of the fluidized bed type filtration tank 42b of the second stage to the fluidized bed type of the third stage. Is supplied to the inlet portion (upper end portion) of the introduction pipe 48c of the filtration tank 42c. Similarly, the supplied water to be treated is a water conduit 48 from the upper part to the lower part of the third-stage fluidized bed type filtration tank 42c.
It reaches the lower part through c and is discharged to the lower part of the third-stage fluidized bed type filtration tank 42c from a plurality of pipes 56c branched at the lower end of the water conduit 48c. The water to be treated discharged to the lower part of the fluidized bed type filtration tank 42c at the third stage flows between the water to be treated and the filter medium 49c in the fluidized bed type filtration tank 42c at the third stage to form a fluidized bed. It is formed and purified while being in contact with the filter medium 49c, gradually rising as indicated by the arrow due to the head pressure between the water conduit 48c, and formed on the upper part of the fluidized bed type filtration tank 42c of the third stage. It is discharged to the settling tank 51 through the discharge pipe 50c, that is, the discharge pipe 52. Settling tank 51
In the above, the treated water that has been once treated by receiving the treated water from the discharge pipe 52 and purified by removing the suspended matter contained in the treated water is discharged (discharged) from the discharge pipe 53 into the treated water area 7.

Filter medium 4 contained in a fluidized bed type filter tank 42.
Since 9 is formed of ore such as zeolite and a plastic filter medium, contaminants such as eutrophic substances adhere to purify water, but when the adhered substance becomes large to some extent, the adhered substance is separated from the filter medium 49. . The adhered substance that has peeled off is discharged from the discharge pipe 52 together with the treated water, but is once separated in the settling tank 51, and the settling material 5
Precipitate as 8. Therefore, contaminants such as rich nutrients that have adhered to and peeled off the filter medium 49 do not flow into the treated water area 7. The settling material 58 in the settling tank 51 is
It can be regularly carried to the land 4 by ship or the like and removed. In addition, the purification device 11 (fluidized bed purification device 1
1 ') is equipped with an engine so that it can be automatically driven, the settling material 58 in the settling tank 51 is directly carried to the land 4 on a regular basis, or an auxiliary member formed on the upper part of the partitioning device 14 described later. It can be carried to the aisle 20 and removed. In addition, the settling material 58 collected at the bottom of the settling tank 51 is connected to the pipe 6
It can be removed by sucking through 0 through the pump 59 and directly conveying (transporting) it to the land 4 by the pipe 61, or by conveying (transporting) it to the auxiliary passage 20 formed in the upper part of the partitioning device 14 described later. From the auxiliary passage 20 to the land 4, for example, by tilting the bottom of the auxiliary passage 20 from one side to the other, and flowing the water, the precipitated substances 58 and the like carried (conveyed or transported) to the auxiliary passage 20 are discharged. Can be transported to land.

FIG. 3 shows a case where three stages 42a, 42b and 42c are arranged in series as the fluidized bed type filtration tank 42. This is because the height of the fluidized bed type filtration tank 42 is lowered and the head of the submersible pump 45 is reduced while ensuring the length of the fluidized bed type filtration tank. There may be one step or a plurality of steps (two steps and four steps or more). Moreover, it is not always necessary to arrange them in series. Next, an embodiment different from the embodiment shown in FIG. 1 according to the present invention will be described with reference to FIG. That is, FIG. 4 shows an embodiment different from FIG. 1 in which the purifying device 11 is arranged in the closed water area 6 (7, 8). Closed water area 6 is shown in Figure 1.
Similarly to the one shown in FIG. 3, the partition device 14 divides the treated water area 7 and the water area 8 outside the treated water area. An intake 6 for supplying water to the water purification plant 1 is installed in the treated water area 7. Then, as the purifying device 11, the treated water in the treated water area 7 is taken in, and the eutrophication substance (eutrophication element) which is a pollutant present in the treatment water is separated and removed to be treated. A purifying device 11a (similar to 11 shown in FIG. 1) that discharges into the water area 7 and the treated water in the water area 8 outside the treated water area 7 are taken in, and the pollution existing in this treated water is taken. It is composed of a plurality of purification devices 11b and 11c for separating and purifying the nutrient rich substance, which is a substance, and purifying the separated substance into the treated water area 7. That is, the purifying device 11a is for purifying the water to be treated in the treated water area 7. On the other hand, the purification device 11
b and 11c are for purifying the treated water in the water area 8 outside the treated water area 7 in order to store a larger amount of the purified water in the treated water area 7. These purification devices 1
1a, 11b and 11c are treated water areas 7 as described above.
It may be installed inside or outside the treated water area 7 (on either side of the partition device 14, the water area 7 or 8), and in the case of floating, it may be floated to either water area 7 or 8. .

In any case, the purification devices 11a, 11b,
A large amount of purified treated water from which contaminants such as rich nutrients and algae have been separated and removed by 11c and 12 is treated water area 7
It has become possible to store it inside. In addition, the purification device 11a
Contaminants that are not removed by ~ 11c, 12 are absorbed by microorganisms by staying in the treated water area 7 for a while (about 2 to 5 days), and the microorganisms complete their life cycle within a few days and settle down. Become. So the pollutant is
The possibility of water being taken from the water intake 2 to the water purification plant 1 is reduced. As a result, the nitrogen component (ammonia nitrogen component) is always
Purified treated water whose content is greatly reduced is the water supply pipe 5
Can be supplied to the water purification plant 1 through the water treatment system, and the water treatment in the water purification plant 1 can be significantly reduced.

Next, one embodiment of the partitioning device 14 according to the present invention will be described with reference to FIGS. That is, the partitioning device 14 connects a large number of partitioning material bodies (structural materials) 14a to 14g formed of a sheet of synthetic resin or the like to the chain 17a,
17b are connected to each other and arranged in the shape of a blind so that they reach the bottom of the lake, and are retained in water by the buoy 15. Weights 16 are attached to the lower portions of the respective partition substance bodies (structural substances) 14a to 14g so that the respective partition substance bodies 14a to 14g are prevented from flowing.
Therefore, it is clear that the weight 16 does not need to be attached to each partition substance body 14a to 14g. Further, it is not always necessary to arrange the partition substance bodies 14a to 14g in a blind shape. On the other hand, by contracting the chains 17a and 17b,
It is possible to pull up and collect each partition material body 14a to 14g. In addition, at least one of the partition substance bodies (structural substances) 14a to 14g has a plurality of restricted openings (a plurality of holes) 18a, 18b, 18c for taking in water outside the partition. There is. In any case, the partitioning device 14 forms a treated water area 7 by surrounding a part of the breakwater 3 around the intake 2 in the closed water area 6 such as a lake or a dam lake. On the other hand, timber and the like will flow into the closed water area 6 such as lakes and dams. Therefore, it is necessary to stake a pile inside to reinforce it so as to withstand driftwood and the like. Further, the partitioning device 14 may be formed in a relatively fine mesh shape, a lattice shape, or a cloth shape by reinforcing it by hitting a pile inside. In any case, it is necessary to prevent water containing a large amount of contaminants from entering the treated water area 7.

Next, an embodiment in which the auxiliary passage 20 is formed in the partition device 14 according to the present invention will be described with reference to FIG. That is, the auxiliary passage 20 formed by the auxiliary passage forming partition device 18 and the auxiliary passage forming buoy 19 is provided above the partition device 14 attached to the buoy 15. The auxiliary passage 20 is a passage for accumulating pollutants (precipitated substance 58 settled on the bottom of the settling tank 51) collected by the purification device 11 using a pipe or the like and collecting the polluted substances at one place near the land. is there. Next, another embodiment of the partitioning device 14 according to the present invention will be described with reference to FIGS. 7 and 8. That is, the partitioning devices 14x and 14y shown in FIG.
1 is different from the partitioning device 14 shown in FIGS. 1 and 4, it is opened midway and does not completely divide the treated water area 7 and the water area 8 outside the treated water area 7. Therefore, a large amount of water containing pollutants will flow in from this open portion. Therefore, if the number of purification devices 11 and 12 is determined in consideration of the fact that water containing a large amount of pollutants flows in from the open portion, the water purification plant 1 from the water intake 2 can be compared with the case where the water is not opened. The quality of the water supplied to is not significantly deteriorated. On the other hand, if the purifying devices 11 (fluidized bed type purifying device 11 ′) and 12 are equipped with an engine so as to be able to run automatically, the purifying device 11 (fluidized bed type purifying device 11 ′) can be passed through the open portion. ), 12 and pollutants (precipitate 58 that settled to the bottom of settling tank 51)
In addition to being able to collect the above, it is possible to facilitate maintenance of the purification devices 11 (fluidized bed type purification device 11 ′) and 12. Also, when using a ship, it is possible to navigate through the open portion.

Also in the case of this embodiment, as in the embodiment shown in FIGS. 1 and 4, a large amount of purified treated water from which contaminants such as rich nutrients and algae are separated and removed is introduced into the treated water area 7. It became possible to store. It should be noted that pollutants that are not removed by the purification devices 11 and 12 are for a while (about 2 to 5 days).
By staying in the treated water area 7, it will be absorbed by microorganisms, and the microorganisms will complete their life cycle within a few days and settle. Therefore, the pollutant is less likely to be taken from the water intake 2 to the water purification plant 1. As a result, the purified treated water in which the content of nitrogen component (ammonia nitrogen component) is greatly reduced is constantly passed through the water supply pipe 5 to the water treatment plant 1.
The water treatment in the water purification plant 1 can be significantly reduced. Next, the progress of water purification according to the degree of partitioning by the partitioning device 14 will be described with reference to FIG. That is, FIG. 8 is a graph showing the progress of water purification according to the degree of partitioning by the partitioning device 14. The vertical axis of the graph shown in FIG. 8 is the degree of water pollution, and phosphorus concentration, nitrogen concentration, COD, etc. are used as indices. The horizontal axis of the graph shown in FIG. 8 indicates the number of days required for purification.

Indicates the progress of purification without the partitioning device 14, and when the pollution degree A is improved and the pollution degree becomes D, further purification is not achieved. . This is because the natural mixing action and the purifying ability of the purifying device are in balance, and further purification cannot be expected without the partition. Alternatively, it indicates the degree of achievement of purification when completely partitioned by the partition device 14 (without opening),
It can be seen that the purification proceeds to point B, which is considerably lower than the reaching point D of the contamination degree in the case of no partition. Alternatively, as shown by the partitioning devices 14x and 14y, when a part is opened, the point C is higher than the final reaching point (final reaching point of the degree of pollution) B of the purification when it is completely completed. However, purification is considerably advanced as compared with the case without a partition, and the effect of partitioning is sufficiently achieved. Therefore, for example, by increasing the number of the purifying devices 11 and 12 to improve the capacity, the partitioning device 1
Even when a part is opened as shown by 4x and 14y, it is possible to bring the reaching point C of the degree of contamination close to B.

Next, as the partitioning device 14 according to the present invention,
An embodiment constituted by the air curtain 14t will be described with reference to FIG. That is, in the present embodiment (air curtain type partitioning device 14t), as shown in FIG.
Is installed on the bottom of the water where the partitioning device 14 is to be formed, and air is supplied to the air diffusing pipe 21 to raise bubbles 2 from the air diffusing pipe 21.
2 is generated, and a partition similar to an air curtain in the air is formed by the vertical water flow 20 as the bubbles 22 rise. In FIG. 9, the treated water area 7 is on the right side of the partitioning device 14t of the air curtain system formed by the rising bubbles generated from the air diffuser 21. The water to be treated taken in through the water intake port 44 is purified by the purifying device 11 ′ and discharged into the treated water area 7 through the discharge pipe 53. According to the present embodiment, it is not necessary to provide the partitioning device 14 formed of a large number of partitioning material bodies (structural materials) 14a to 14g formed of a sheet of synthetic resin or the like as shown in FIG. It does not hinder navigation. Further, the partitioning device 1 formed of a large number of partitioning material bodies (structural materials) 14a to 14g by a typhoon
There is no need to worry about the loss of 4. However, the purifiers 11 and 1 in the closed water area 6 (7, 8) due to the inflow of driftwood etc.
Since there is a possibility of colliding with the cleaning device 11 and 12 and destroying the purifying devices 11 and 12, in the case of the air curtain type partitioning device 14t, it is necessary to provide a fence or the like on the outside thereof to prevent driftwood or the like from entering. is there.

Next, another embodiment of the local water area purification system including the purification apparatus according to the present invention will be described with reference to FIGS. 10 to 12. FIG. 10 is a view showing another embodiment of the local water area purification system including the purification device according to the present invention as viewed from above the water intake 2 to the water purification plant 1. That is, the local water purification system includes the net 23, the first fence 24, the second fence 25, in the closed water area 6 in the direction of the arrow.
The pollutant removal device 41 including the third fence 26 and the fourth fence 27, the algae removal device 28, and the purification device 29 are arranged along the flow path 35 through which the water to be treated flows. A water intake 2 to the water purification plant 1 is provided in a portion purified by passing through the purification device 29. Then, in the closed water area 6, both sides of the flow path 35 from the net 23 to the water intake 2 are partitioned by side walls 36. The side wall 36 may also serve as the breakwater 3. Therefore, the water to be treated in the water area 8 outside the net 23 includes the net 23, the first fence 24, the second fence 25, which constitute the pollutant removal device 41.
By passing through the third fence 26 and the fourth fence 27, contaminants existing in the water to be treated are separated and removed and flow into the treated water area 7 ′. The treated water that has flowed into the treated water area 7 ′ is purified at the final stage by the algae removing device 28 and the purifying device 29, and flows to the water intake 6. In addition,
In the treated water area 7 ', dredging or coating is applied in advance to prevent elution of ammonia nitrogen from the bottom mud.

FIG. 11 shows the relationship in the depth direction (cross section taken along the flow path 35) in the contaminant removing device 41. The treated water in the water area 8 outside the net 23 is shown in FIG.
From the right side of No. 1, it passes through the net 23, the first fence 24, the second fence 25, the third fence 26, and the fourth fence 27 and flows into the treated water area 7 ′. 37
Is a buoy that supports the upper ends of the net 23, the first fence 24, the second fence 25, the third fence 26, and the fourth fence 27. The lower ends of the net 23, the first fence 24, the second fence 25, the third fence 26, and the fourth fence 27 are fixed to the bottom of the water so as not to move. The net 23 is installed for the purpose of relaxing resistance due to wind waves and protecting the inside fences 24 to 27 from driftwood and the like.

The first fence 24 is the second fence 2
5 is to create a flow (upward flow) 40 that rises with respect to the water to be treated. About 1 to 3 m from the bottom of the water is an inflow passage for the water to be treated (mesh-shaped, with many large openings). (The installed state, a grid shape, a large passage, etc.) 39, and more water to be treated is shielded from the upper surface to the water surface. In the first fence 24, it is not necessary to completely block the water to be treated from the upper surface of the inflow passage 39 to the water surface, and more water may be blocked. Further, the second fence 25 is opposite to the first fence 24 from the bottom of the lake about 1
A part (about 3 m) is shielded more, and a flow (upward flow) 40 that raises the water to be treated is created, and the centrifugal force of this flow 40 separates suspended matter components contained in the water to be treated. The sludge 30 is deposited toward the blocking surface 41 and the water bottom of the fence 25 of No. 2 and deposited as sludge 30 on the bottom. That is, the water to be treated that has passed through the inflow passage 39 of the first fence 24 hits the shielding surface 41 of the second fence 25, and the direction of the flow 39 is upward. At this time, suspended matter components in the water to be treated are separated from the water to be treated by centrifugal force. The separated suspended matter component is accumulated as sludge 30 on the bottom of the second fence 25. The accumulated sludge 30 is carried by the sludge extraction pump 33 to the land 4 via the pipe 38 and collected. The next rising water (upward flow water) passes through the upper passage 42 of the second fence 25, is blocked from traveling by the upper shielding portion 43 of the third fence 26, and is blocked by the second fence 25. Therefore, the gap formed between the second fence 26 and the third fence 26 is lowered. Like the first fence 24, the third fence 26 has a water inflow passage of about 1 to 3 m from the bottom of the water,
The water is shielded by the shielding portion 43 from the upper surface to the water surface. The average water depth in the passage 35 is about 2 to 8 m.

The water that has passed through the passage below the third fence 26 becomes a flow that rises through the gap between the third fence 26 and the fourth fence 27. The fourth fence 27 shields the second fence 25 and water in a portion of about 1 to 4 m from the bottom of the water to generate an upward flow. The water that has generated this upward flow passes through a filter medium layer 32 such as charcoal that is wrapped around a net 31 placed near the bottom of the water, and is aerated by a diffuser pipe 34 to which air is supplied. Much of the ammoniacal nitrogen in the water is converted to nitrate nitrogen in this aeration layer. In this way, the treated water in which most of the ammonia nitrogen in the water is converted to nitrate nitrogen passes through the inflow passage 44 on the upper side of the fourth fence 27 and flows into the treated water area 7 '. As described above, the pollutant removal device 41 causes the flow of the suspended substance component in the water to be treated to generate a flow indicated by an arrow as shown in FIG. Sludge is separated and removed from the water to be treated by
0 is deposited, and then the treated water is passed through the filter medium layer 32 such as charcoal and aerated by the diffuser pipe 34, whereby most of the ammonia nitrogen in the water is converted into nitrate nitrogen to the treated water area 7 ′. And let it flow in. That is,
The water to be treated entering from the net 23 is a pollutant removal device 41.
As a result, the suspended matter components are separated and removed, and most of the ammoniacal nitrogen is converted into nitrate nitrogen and flows into the treated water area 7 '.

Next, the algae are removed from the water in the treated water area 7'by passing through the algae removing device (algae filtering device) 28. Further, the purification device 29 shown in FIG.
It is purified by passing through, reaches the water intake 2 to the water purification plant 1, and is supplied to the water purification plant 1 from this water intake 2. In any case, between the treated water area 7'and the intake port 2, it will stay for about 1 to 2 days, and the contaminants that are not removed will be absorbed by the microorganisms, and the microorganisms will remain for about 1 to 2 days. At the end of the life cycle, it settles and is purified. Next, regarding the purifying device 29, FIG.
This will be described with reference to FIG. That is, the purifying device 29 includes a plurality of stages of cloth portions (for example, non-woven fabric portions) 35 and a guide plate 36. The water from the treated water area 7 ′ that has flowed in from the right side of the drawing is partially filtered through a cloth portion (for example, a non-woven cloth portion) 35. The water that has not passed through the cloth portion 35 is guided to the next cloth portion 35 by the guide plate 36 and gradually purified. That is, the water from the treated water area 7'is
It is gradually purified by passing through a plurality of stages of cloth portions 35. The cloth portion 35 does not have to be a cloth-shaped fiber. That is, the cloth portion 35 may be any material as long as it is purified by passing the cloth portion 35, and may be formed, for example, in a dense mesh shape or a dense lattice shape.

Since the water intake in the water purification plant 1 assumed in this embodiment is about 160,000 tons per day, as shown in FIG. 10, the size of the passage 35 is about 1 to 2 days. It should be set so that the amount of water intake can be secured. Thereby, water can be stably supplied to the water purification plant 1. As the purifying device 29, a fluidized bed type purifying device having the configuration shown in FIG. 3 may be used.

[0044]

INDUSTRIAL APPLICABILITY According to the present invention, in a closed water area (water source) such as a lake, a pond or a dam lake, the concentration of ammonia nitrogen generated by the eutrophication phenomenon is greatly reduced to improve the water quality. Water can be supplied to the water treatment plant, and as a result, a large amount of chlorine for disinfection is not input to the water treatment plant, and the amount of residual chlorine can be significantly reduced. It is possible to almost eliminate the generation of carcinogenic substances such as trihalomethane formed by the combination. Further, according to the present invention, treated water from a closed water area (water source) such as lakes, ponds, dam lakes, etc., in which the concentration of dissolved eutrophication substances and suspended substances is significantly reduced to improve water quality is treated. It is possible to supply water to the water purification plant, and it is possible to significantly reduce the treatment at the water purification plant and provide high quality water from the water purification plant. Further, according to the present invention, by providing a partitioning device for partitioning at least a part of the closed water area of a lake, a pond, a dam lake, etc. so as to surround at least a part of the closed water area to form at least a part of the treated water area, Since the amount of water in the water area can be limited and the water in the treated water area is in a stable state, there is an effect that the efficiency of uptake of pollutants by the purification device can be increased.

Further, according to the present invention, since the purification device is constituted by a fluidized bed type filter tank, contaminants such as eutrophication substances can be efficiently separated and removed, and as a result, dissolved eutrophic substances can be removed. The effect that it is possible to supply the treated water to the water purification plant by significantly reducing the concentration of the chemical substance and the suspended substance and improving the water quality. According to the invention,
It is composed of a fluidized bed type filter tank as a purifying device, and water is made to flow through the filter tank due to the head difference, so it is a simple power source with only a pump for taking in water, The effect that the contaminants can be efficiently separated and removed is exhibited. Further, according to the present invention, without securing a space to install the purification device on land, it is possible to float or fix the purification device in the closed water area, and from the closed water area (water source), There is an effect that the concentration of dissolved eutrophication substances and suspended substances can be significantly reduced and the treated water with improved water quality can be supplied to the water purification plant.
Further, according to the present invention, it is possible to remove the pollutants of the water in the treated water area in advance only by disposing the pollutant removing device having a simple structure along the flow path provided in the closed water area. The effect of being able to greatly reduce the amount of purification in the treated water area is achieved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a local water area purification system according to the present invention, focusing on a water intake in a closed water area.

FIG. 2 is a perspective view of a fluidized bed purification apparatus showing an embodiment of the purification apparatus according to the present invention.

FIG. 3 is a cross-sectional view showing a positional relationship of the fluidized bed purification apparatus shown in FIG.

FIG. 4 is an explanatory view showing another embodiment of the local water area purification system according to the present invention, focusing on the intake in the closed water area.

FIG. 5 is a partial detailed view showing an embodiment of the partitioning device according to the present invention.

6 is a cross-sectional view showing an embodiment in which an auxiliary passage is provided at the upper end of the partition device shown in FIG.

FIG. 7 is an explanatory view showing still another embodiment of the local water area purification system according to the present invention, focusing on the intake in the closed water area.

FIG. 8 is a purification progress graph showing the relationship between the degree of pollution of water quality and the number of days required for purification according to the degree of partitioning by the partitioning device according to the present invention.

FIG. 9 is a view showing an embodiment of an air curtain system (air bubble system) in the partition device according to the present invention.

FIG. 10 is an explanatory view showing still another embodiment of the local water area purification system according to the present invention, focusing on the intake in the closed water area.

11 is a cross-sectional view showing an embodiment of the contaminant removing device shown in FIG. 10 along a passage.

FIG. 12 is a detailed view showing an embodiment of the purification device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Water purification plant, 2 ... Intake port, 5 ... Water supply pipe, 6 ... Closed water area, 7, 7 '... Treated water area 8 ... Water area outside treated water area, 11, 11a, 11b ... Purification device 12 ... Algae removal device (Purification device) 14, 14t, 14x, 14y, ... Partitioning device, 15 ...
Buoy 11 '... Fluidized bed type purification device, 14a-14g ... Partition material body (structural material) 16a-16g ... Weight, 18a-18c ... Opening, 20 ...
Auxiliary passage 21 ... Air diffuser, 22 ... Bubbles, 23 ... Net, 24 ... First
Fence 25 ... Second Fence, 26 ... Third Fence, 27 ...
Fourth fence 28 ... Algae removing device, 29 ... Purifying device (cloth purifying device),
30 ... Sludge 31 ... Net, 32 ... Filter material layer such as charcoal, 33 ... Sludge drawing pump 34 ... Diffuser pipe, 35 ... Cloth portion, 36 ... Guide plate 42, 42a to 42c ... Fluidized bed type filtration tank, 44 ... Water intake Mouth, 45 ... Submersible pump 48a-48c ... Water conduit, 50a-50c ... Discharge pipe, 5
1 ... Settling tank 52, 53 ... Discharge pipe, 49, 49a to 49c ... Filter medium

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Yoda 603 Kintatemachi, Tsuchiura City, Ibaraki Prefecture Hitachi Ltd. Tsuchiura Plant

Claims (31)

[Claims] 1. A partitioning body that partitions in a depth direction so as to surround at least a part of a closed water body to form a treated water body,
A purification device for taking in water from the closed water area or the treated water area to separate and remove pollutants present in the water, and discharging the separated and removed treated water to the treated water area; A local water area purification system, which is configured to take in the treated water in the treated water area to a water purification plant. 2. The volume of the treated water area is 2 to 3 times the daily intake amount, and the daily treatable water amount of the purification device is 100% to 70% of the daily intake amount. The local water area purification system according to claim 1, wherein 3. The local water purification system according to claim 1, wherein the purification device contains a nutrient or an alga as a contaminant to be separated and removed. 4. The local water purification system according to claim 1, wherein the purification device is installed in the closed water area or the treated water area. 5. The purifier includes a pump for taking in water in the closed water area or the treated water area, and the water taken in by the operation of the pump is brought into contact with a filter to purify and release the treated water. The local water area purification system according to claim 1, further comprising: a filtration tank that performs the above treatment, and a settling tank that settles suspended substances existing in the treated water discharged from the filtration tank. 6. The local water area purification system according to claim 1, wherein the purification apparatus is provided with a power source for driving the pump. 7. The system for purifying local water bodies according to claim 1, wherein an auxiliary passage through which a contaminant treated by the purifying device flows is formed above the partition object. 8. The local water purification system according to claim 1, wherein the purification device is floated in the closed water area. 9. A partitioning body which partitions at least a part of a closed water area in the depth direction so as to form at least a part of a treated water area, and water intake for taking in water of the closed water area or the treated water area. Means and a filtering means for contacting the water to be treated taken in by the water collecting means with a filter to purify and discharging or flowing out, and a settling to settle suspended substances existing in the treated water discharged or discharged from the filtering means And a purification device configured to discharge or outflow the treated water into the treated water area by separating and removing contaminants existing in the taken-in treated water by the filtering means and the precipitation means. A local water area purification system characterized in that the water in the treated water area purified by the purification apparatus is taken into a water purification plant. 10. A partitioning body that partitions at least a part of a closed water body in the depth direction so as to form at least a part of a treated water area, and water intake for taking in water of the closed water area or the treated water area. Means and settling means for settling suspended solids present in the water to be treated taken by the water intake means and the treated water treated by the settling means are brought into contact with the filter to purify and release or discharge the treated water And a purifying device configured to discharge and outflow the treated water to the treated water area by separating and removing contaminants existing in the treated water that has been taken in by the sedimentation means and the filtering means. A local water area purification system, characterized in that the water in the treated water area, which is purified by the purification apparatus, is taken into a water purification plant. 11. The local water area purification system according to claim 9, wherein the purification means comprises a fluidized bed type filtration tank as the filtration means. 12. The filtering means of the purifying device is configured to generate an ascending flow of the water to be treated discharged to the bottom of a filter tank filled with a filter medium while being in contact with the filter medium due to a head pressure difference. The local water area purification system according to claim 9 or 10. 13. Treated water obtained by contacting and purifying the settling means for settling floating substances present in the treated water which is taken in or flowed in from the closed water area and the treated water treated by the settling means with a filter. And a filtering means for discharging or flowing out the pollutants existing in the water to be treated are separated and removed by the precipitation means and the filtering means, and the purified treated water is discharged or discharged to the treated water area. A local water area purification system comprising a purifying device, wherein the treated water purified by the purifying device is configured to be taken into a water purification plant. 14. Filtering means for purifying and discharging or flowing out treated water which is taken in or flowed in from a closed water area by contacting with a filter, and suspended matter existing in the treated water purified by the filtering means. A purifying apparatus comprising a sedimentation means for sedimentation, and configured to discharge or outflow the treated water purified by separating and removing contaminants existing in the water to be treated by the filtering means and the sedimentation means. A local water area purification system, characterized in that the treated water purified by the purification device is taken into a water purification plant. 15. The system for purifying local water bodies according to claim 13 or 14, wherein a fluidized bed type filtration tank is used as the filtration means of the purification device. 16. The filtering means of the purifying device is configured to generate an upward flow of the water to be treated discharged to the bottom of a filter tank filled with a filter medium while being in contact with the filter medium due to a head pressure difference. 15. The method according to claim 13 or 14,
The described local water purification system. 17. A filter means of the purification device, wherein the water to be treated is passed through while contacting with a filter material such as charcoal and is detonated to convert ammonia nitrogen in the water to be treated into nitrate nitrogen. The local water area purification system according to claim 13 or 14, characterized in that. 18. As the settling means of the purification device, an upward flow is generated from the flow along the bottom of the water to be treated,
The local water purification system according to claim 13 or 14, characterized in that the suspended matter is settled and removed by the centrifugal force of this flow. 19. As a settling means of the purification device, an ascending flow is generated from the flow along the bottom of the water to be treated,
15. The system for purifying local water bodies according to claim 13 or 14, characterized in that suspended matter is settled and accumulated by the centrifugal force of this flow to be removed, and the accumulated sludge is collected. 20. A partitioning body that forms a treated water area by partitioning in the depth direction so as to surround at least a part of a closed water area, and is present in water that is installed in the treated water area and taken from the treated water area. A treated water area having a filtration tank for separating and removing contaminants by contacting with a filter material and discharging treated water treated in the filtration tank to the treated water area; and the treated water area purified by the purifying apparatus. A local water area purification system characterized in that the water inside is taken in to a water purification plant. 21. When the water to be treated flows along a flow path formed in a closed water region, at least a part of the treated water region is formed by partitioning in the depth direction so as to surround at least a part of the water. And a partitioning object having a contaminant removal function, an algae removing device for removing algae present in the water of the treated water area, and a purification for purifying by passing the treated water from which algae have been removed by the algae removing device And a device for collecting water in the treated water purified by the purification device to a water purification plant. 22. The system for purifying local water bodies according to claim 21, wherein the purification device is formed by installing a cloth-shaped, lattice-shaped, or net-shaped filter material at a desired portion of the flow path. 23. First passage forming means having a passage through which water to be treated flows and having a passage into which the water to be treated flows, and a bottom portion flowing in through a passage of the first passage forming means. Second passage forming means for changing the flow of the treated water along the upward flow to an upward flow and causing the suspended matter to settle by the centrifugal force based on this flow and accumulating as sludge on the bottom, and an upper part of the second passage forming means The third passage forming means having a passage at the bottom by further guiding the treated water flowing through the passage provided in the first passage to the bottom portion, and the treated water flowing in through the passage of the third passage forming means into a filter medium layer such as charcoal. A pollutant removing device comprising: a filtering unit configured to convert ammoniacal nitrogen in the water to be treated into nitrate nitrogen by aerating through the channel and the filtering unit. 24. A first passage forming means having a passage for flowing the water to be treated in the closed water region and having a passage for allowing the water to be treated to flow into the bottom portion, and a passage of the first passage forming means. Second passage forming means for converting a flow of the water to be treated flowing through the bottom through to an upward flow and causing a centrifugal force based on the flow to settle suspended solids and deposit the sludge on the bottom as sludge; Third passage forming means having a passage at the bottom by further guiding the untreated water flowing through the passage provided on the upper portion of the passage forming means to the bottom portion, and the treated water flowing through the passage of the third passage forming means, A pollutant removal device constituted by installing a filtering means configured to convert ammoniacal nitrogen in the water to be treated into nitrate nitrogen by aeration through a filter medium layer such as charcoal and the channel is provided. Special features Local water purification system to be. 25. The local water area purification system according to claim 24, wherein the pollutant removing device is provided with a collecting means for collecting the sludge accumulated at the bottom portion by the second passage forming means. 26. A partitioning device for partitioning at least a part of a closed water area in the depth direction so as to constitute at least a part of the treated water area, and a partition device installed in the treated water area for pumping the water of the treated water area to a water treatment plant. And a purification device that takes in water in the water area outside the treated water area, separates and removes the contaminants present in the taken water, and discharges the separated and removed treated water into the treated water area. A local water area purification system characterized by being equipped. 27. A body partitioning body for partitioning in a depth direction so as to surround at least a part of a closed body of water, wherein a plurality of partition bodies are connected in a chain shape by a chain, and the partition body in the shape of a blind is partly connected to the partition body. A water area partition object, characterized in that an opening through which water in the water area outside the treated water area passes is formed, and the buoy holds the partition object in water. 28. One or more partitioning devices for partitioning at least a part of the closed water area in the depth direction, an intake pipe installed in the treated water area for pumping water of the treated water area to a water treatment plant, and the closed property. A purifying device for taking in water from the water area, separating and removing pollutants existing in the taken water, and discharging the treated water from which the pollutant has been separated and removed between the partition device and the intake pipe A local water purification system that is characterized by 29. A partition means for providing a diffusing pipe at the bottom of the water so as to surround at least a part of the closed water area, and forming a bubble from the diffusing tube to constitute at least a part of the treated water area; The intake pipe installed in the treated water area for pumping water and the water in the closed water area are taken in to separate and remove the pollutants present in the taken water, and the treated water from which the pollutant is separated and removed is A local water area purification system, comprising: a purifying device that discharges the treated water area. 30. In a closed water area, the treated water purified by separating and removing the contaminants present in the water to be treated is discharged to the partitioned treated water area, and the treated water in the treated water area is purified by a water pipe. A method for purifying a local water area, characterized by supplying the water to the site. 31. A pump for taking in water for purification,
A filtration tank filled with a filter medium for purifying the water to be treated taken by this pump, a discharge section for discharging the treated water purified by the filtration tank, and a suspended substance in the water settling on the downstream side of this discharge section. A purifying device comprising a settling tank for removing by removing.