JPH10286582A - Water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily secure an installation site, shorten the time for installation, and lower the cost for building up by making a treatment tank to purify water, an electromotive apparatus to operate the treatment tank, a control apparatus to control the operation of the electromotive apparatus, and a solar cell panel as an electric power source float on the surface of water by a float body. SOLUTION: A core unit 11 is covered with a cover with a pyramid shape in the upper part and under the cover, a treatment tank 2 to purify water, an electromotive apparatus 3 to operate the treatment tank 2, and a control apparatus 4 to control the operation of the electromotive apparatus 3 are housed. The components contained in the core unit 11 are all installed in a rectangular substrate 11a. A float body 11c to float the core unit 11 on the water surface is unitedly installed in the lower part of the substrate 11a. After the core unit 11 is floated on the water surface in a water area to be purified, it is moored through a chain or a rope 13 to an anchor or to a stake. A closed container like body having the empty inside is used as the float body 11c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus, and more particularly to a water treatment apparatus for purifying water in lakes, marshes, dam lakes, reservoirs, regulating ponds, and the like.

[0002]

2. Description of the Related Art In recent years, the quality of water in lakes and marshes, dam lakes, reservoirs, regulating ponds, and the like has been extremely deteriorated due to the inflow of organic matter such as domestic wastewater. For this reason, various water treatment apparatuses for purifying the water quality are being developed. This water treatment apparatus is usually installed on land near the lake or the like.

[0003]

However, when the water treatment apparatus is installed on land, there is a problem that it is difficult to secure an installation place. In addition, when installing, there is a problem that a long construction period is required for the foundation work and the like, so that it cannot be easily installed or a large construction cost is required. In addition, when lakes and marshes that require purification are vast, there is a problem that it is difficult to purify water at a location distant from the water treatment apparatus or offshore.

[0004] The present invention has been made in view of such circumstances, and has as its object the purpose of easily securing an installation place, shortening the installation period, reducing construction costs, and purifying purification. It is an object of the present invention to provide a water treatment apparatus which can easily purify the entire water quality of a lake or the like even if the lake or the like is very large.

[0005]

Means for Solving the Problems To achieve the above object, the present invention according to claim 1 of the present invention provides a treatment tank for purifying water quality, an electric device for operating the treatment tank, and an electric motor. A control device for controlling the operation of the device, a solar cell panel as a power source, and a floating body, wherein the processing tank, the electric device, the control device, and the solar cell panel are floated near the water surface by the floating body. Features.

[0006] With such a configuration, the water treatment apparatus of the present invention can be installed near the surface of a water area requiring purification.

According to a second aspect of the present invention, in addition to the first aspect, the treatment tank comprises a pretreatment tank, a main treatment tank, and a final treatment tank, and microorganisms for purifying water are mainly treated. The ozone is held in the tank, and the ozone is fed into the pre-treatment tank and the final treatment tank.

[0008] With this configuration, the raw water that needs to be purified is purified by microorganisms in the main treatment tank. Also, even if there is microorganisms harmful to the microorganisms in the main treatment tank or zooplankton that eats the microorganisms in the main treatment tank in the raw water, they are killed by the ozone aeration in the preliminary treatment tank. Further, even if microorganisms used in the main treatment tank are present in the treated water recovered from the main treatment tank, the microorganisms are killed by the ozone aeration in the final treatment tank.

According to a third aspect of the present invention, in addition to the second aspect, a core unit provided with the processing tank, the electric equipment and the control device, and a solar unit provided with the solar cell panel are provided. Wherein the core unit and the solar unit are each floated near the water surface by the floating body.

[0010] With this configuration, the core unit and the solar unit are compactly assembled. These are transported from the factory to the site by trailers, etc., where they are floated near the water surface with a crane from a dock or on a bridge. Only simple finishing works such as connection between units, connection and wiring between core unit and solar unit are performed.

In this water treatment apparatus, at least one of the core unit and the solar unit is provided with an anchor for mooring the core unit and the solar unit. Is preferred.

With this configuration, the core unit and the solar unit can be moored in an arbitrary water area by the anchor.

According to a fifth aspect of the present invention, there is provided a core unit provided with an air blower for discharging air and a control device for controlling the operation of the air blower, a solar unit provided with a solar cell panel as a power supply, and a floating body. With
The core unit and the solar unit are floated near the water surface by the floating body.On the other hand, a filter medium for breeding microorganisms having a property of purifying water and a diffuser for releasing bubbles are held in water, and the dispersion is performed. The air blower is disposed below the filter medium, and air is supplied from the air blower to the air diffuser.

[0014] With this configuration, microorganisms having the property of purifying water quality that live in raw water adhere to and propagate on the filter medium, and the filter medium is aerated by bubbles rising from the air diffuser. Then, the lower layer of water that rises with the rise of the bubbles is purified by the microorganisms. Further, oxygen is dissolved in water by the air released from the air diffuser. The water thus purified and having oxygen dissolved therein diffuses in all directions near the water surface.

In this water treatment apparatus, it is preferable that the side between the air diffuser and the filter medium is surrounded by a cylinder whose upper and lower ends are opened. With this configuration, the flow of water rising from the lower layer and passing through the filter medium is enhanced.

Further, in the water treatment apparatus according to the fifth or sixth aspect of the present invention, at least one of the core unit and the solar unit includes the core unit, the solar unit, and the filter medium. Preferably, an anchor for mooring the air diffuser is provided.

With this configuration, the core unit, the solar unit, the filter medium, and the air diffuser can be moored in an arbitrary water area by the anchor.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 show an embodiment of the water treatment apparatus of the present invention, FIG. 1 is a perspective view thereof, and FIGS. 2 and 3 are treatment system diagrams showing how water is treated by the water treatment apparatus of FIG. FIG. 4 is a plan view showing a core unit of the water treatment apparatus of FIG.

In the drawings, reference numeral 11 denotes a core unit;
Is a solar unit. The core unit 11 has an upper part covered with a cover 11b having a quadrangular pyramid shape or the like. As shown in FIG. 2, a processing tank 2 for purifying water quality and an electric device 3 for operating the processing tank 2 are provided below the core unit 11. And a control device 4 for controlling the operation of the electric device 3 are accommodated.

The processing tank 2 includes a pre-processing tank 21, a main processing tank 22, and a final processing tank 23. The main processing tank 22 further includes a first tank 22a, a second tank 22b, and a third tank 22c.
It consists of two tanks.

The water pipe 24 for guiding water from the pretreatment tank 21 to the first tank 22a is an inverted U-shape, and the tips of both the pretreatment tank 21 and the first tank 22a are deeply immersed in water. . The water pipe 25 for guiding water from the first tank 22a to the second tank 22b and the water pipe 26 for guiding water from the second tank 22b to the third tank 22c both have the former side open above the water surface,
On the latter side, the tip is submerged deep in the water. In addition, the third tank 2
The water passage 27 for guiding water from 2c to the final treatment tank 23 is open on the water surface on both the former side and the latter side.

At the bottoms of all the processing tanks 21, 22, 23, diffuser tubes 61, 62 as diffusers are provided, respectively.
Is installed. As the air diffusers 61 and 62, those in which both ends of a circular pipe are closed to form a container and a number of pores are provided on a circumferential surface are used. Among the diffuser tubes 61 and 62, those (62a, 62b) installed in the preliminary processing tank 21 and the final processing tank 23 are connected at one end thereof to an air supply pipe from an ozone discharge port of an ozone generator 32 described later. And
An air supply pipe (61) installed in the main processing tank 22 is connected to one end of the main processing tank 22 through an air discharge port of an air blower 33 described later.

First tank 22a, second tank 22b and third tank 2
The filter medium 28 is filled in the inside of 2c above the air diffuser 61, respectively. The filter medium 28 is not particularly limited, but, for example, a plastic thin plate formed into a fixed shape is used, and a large number of them are arranged in a tank or have many fine holes. A ceramic globule is used and filled into the tank. In addition, the first tank 22
a, Filter medium 28 to be filled in second tank 22b and third tank 22c
May be the same or different.

After the treatment tank 2 is completely filled, the first
An aerobic microorganism having a property of purifying water is charged into the tank 22a, the second tank 22b, and the third tank 22c, and air is sent from the air blower 33 to the air diffuser 61. As a result, the filter medium 28 is aerated with air, and the introduced microorganisms adhere to and inhabit the surface of the filter medium 28. Thereafter, when contaminated raw water containing a large amount of organic matter flows in, microorganisms on the surface of the filter medium 28 proliferate vigorously using the organic matter as a nutrient source, whereby organic matter in the raw water is decomposed and removed, and as a result, water quality is purified. You. The first tank 22a, the second tank 22b, and the third tank 2
The types of microorganisms to be put into 2c may be the same or different.

The structure of the processing tank 2 is actually, for example, as shown in FIG. That is, the preliminary processing tank 21 is further divided into three tanks,
The tank 22a, the second tank 22b, and the third tank 22c are each further divided into three tanks, and the final processing tank 23 is further divided into three tanks. Then, the first tank 22a and the second tank 22
b, and between the second tank 22b and the third tank 22c, sedimentation tanks 29a and 29b are provided, respectively.

With the processing tank 2 having such a structure, the cross-sectional area can be set so that the flow rate of the water flowing through the processing tank 2 becomes optimum. The effect of the water treatment can be adjusted by changing the type of the filter medium 28, and the sedimentation tank 29
Regarding a and 29b, suspended substances can be more reliably removed.

In FIG. 5A, the portions indicated by black arrows indicate portions where water flows through the lower part of the partition wall, as shown in FIG. 5B. ,
A portion indicated by a white arrow indicates a portion where water flows by overflow in the vicinity of the water surface above the partition wall as shown in FIG. 5C.

Next, the electric equipment 3 comprises an underwater pump 31 for pumping raw water, an ozone generator 32 for generating ozone, and an air blower 33 for discharging air.
Further, the control device 4 includes a solar unit 1 described later.
An inverter 42 for converting the power transmitted from the solar cell panel 5 or the battery 51 from DC to AC.
And a control panel 41 for operating the electric device 3 with the electric power.

The components included in the core unit 11 are all arranged on a rectangular substrate 11a (see FIG. 2). A floating body 11c is provided below the substrate 11a to allow the core unit 11 to float near the water surface.
Are provided integrally. And this core unit 11
Is floated near the water surface in a water area requiring purification, and then moored with a chain or a rope 13 with an anchor or moored on a stake or the like.

The floating body 11c is not particularly limited, but may be, for example, a closed container having a hollow inside or a foamed plastic molded into an appropriate shape. In addition, this floating body 11c may be one,
A plurality may be attached to the substrate 11a.

Now, the solar unit 12 is shown in FIG.
As shown in the figure, a large number are arranged on both sides of the core unit 11, respectively. Each solar unit 12 is obtained by mounting the solar cell panel 5 on a rectangular substrate 12a at an angle. The angle of the inclination is set in consideration of the altitude of the sun in summer and winter, so that the irradiation angle of sunlight is as close to a right angle as possible, and also that the dirt on the surface of the solar cell panel 5 is well washed away by rainwater. Can be determined. In addition, the solar cell panel 5 in each solar unit 12
The height of the solar cell panel 5 in consideration of the effective condensing area of the entire solar cell panel 5, the installation area of the entire solar unit 12, or the stability of the solar unit 12 against wind and waves,
Determined to be optimal. Note that a waterproof container (not shown) is provided between the solar cell panel 5 and the substrate 12a, and a battery 51 as an auxiliary power supply is stored in the container (see FIG. 3).

The substrate 1 in this solar unit 12
At the lower part of 2a, a floating body 12b that allows the solar unit 12 to float near the water surface is provided integrally. The floating body 12b is not particularly limited, and may be the same as the floating body 11c of the core unit 11.

The solar units 12 are aligned so that the inclination directions of the solar cell panels 5 are the same, and are connected so that they gather together or almost in contact with each other. . Then, the group of solar units 12 is connected to the core unit 11.
After being floated near the water surface in the vicinity of the chain, the chain or the rope 1 is oriented such that the inclination direction of the solar cell panel 5 is directed to the south.
3 moored with an anchor or moored to a pile.

As for the unit (quantity) for connecting the solar units 12 together, all the units may be connected in advance at the factory, but if the unit becomes too large for transportation, the factory may use a small unit. And they may be further connected after floating near the water surface. Further, the solar unit 12 floating near the water surface as described above may be connected to the core unit 11 by a rope or the like after being moored with an anchor or a pile or the like, or in a state where the mooring is not moored.

Next, the manner of water treatment by the water treatment apparatus 1 of this embodiment will be described. First, raw water that needs purification is
The water is pumped up by an underwater pump 31 held in water, and is introduced onto the water surface of the pretreatment tank 21 through an introduction pipe 31a. Then, solids such as refuse and suspended matter are precipitated and removed in the pretreatment tank 21.

The raw water may contain microorganisms that are harmful to the microorganisms in the main processing tank 22 or zooplankton that eats the microorganisms in the main processing tank 22. Therefore, in the pretreatment tank 21, the ozone generator 32
The ozone is supplied to the air diffuser 62a, and is released into water as bubbles. This kills harmful microorganisms and zooplankton in raw water.

The water which has been subjected to the treatment in the pretreatment tank 21 in this manner is led to the first tank 22a of the main treatment tank 22 through the water pipe 24 by overflow. In this case, the lower layer of water is guided from the pretreatment tank 21 to the lower layer of the first tank 22a.

In the first tank 22a, air bubbles are released from the air diffuser 61, and the air bubbles are used to aerate the filter medium 28. The water guided from the pretreatment tank 21 to the lower layer of the first tank 22a is purified by microorganisms while rising between the filter media 28. Thereafter, the water is guided by the water pipe 25 to the second tank 22b by overflow. In that case, the first tank 22
From a, the upper layer of water is guided to the lower layer of the second tank 22b.

Thereafter, the same processing as in the first tank 22a is performed in the second tank 22b and the third tank 22c. As a result, the water recovered from the third tank 22c has an organic matter content of a predetermined concentration or less, and is completely purified in that sense.

However, this water contains the first tank 22a and the second tank 22a.
It cannot be stated that the microorganisms used in the tank 22b and the third tank 22c are not mixed at all. Therefore, the third tank 2
The water in the upper layer of 2c is led to the final treatment tank 23 by overflow through the water passage 27. This final processing tank 23
Then, ozone is sent from the ozone generator 32 to the air diffuser 62b, and is released as bubbles in water.

Thus, even if the microorganisms used in the first tank 22a, the second tank 22b, and the third tank 22c are mixed in the water flowing out of the third tank 22c, the microorganisms are killed by ozone. I do. Furthermore, even if microorganisms in the raw water still exist therein, the microorganisms die in the final treatment tank 23. Therefore, completely purified and sterilized treated water can be recovered from the final treatment tank 23.

As described above, since the water treatment apparatus 1 of the present embodiment can be installed near the surface of a lake or the like that requires purification, it is not necessary to secure an installation place on land, and There is no need to find a power source for operating the processing device 1 on land. Therefore, installation is very easy.

Further, the position of the water treatment apparatus 1 of this embodiment can be easily fixed by mooring it with an anchor using a chain or a rope. This makes it possible to easily purify the entire water quality of the lake or the like.

Further, since the water treatment apparatus 1 of the present embodiment includes the core unit 11 and the solar unit 12, the water treatment apparatus 1 can be compactly packed, and can be easily transported from the factory where they are manufactured to the site. Moreover, after that, when installing near the water surface, these units 11, 12
Is floated near the water surface with a crane from a dock or on a bridge, and then towed to a predetermined water area by a ship, and then moored with an anchor or moored to a pile. The installation work is completed only by performing the finishing work such as simple assembly and wiring. Therefore, the construction period is extremely short, and the construction cost is reduced.

Further, the water treatment apparatus 1 of the present embodiment is composed of zooplankton that is harmful to microorganisms used in the main treatment tank 22 and eats microorganisms used in the main treatment tank 22. Even if they are present in water, they are killed by ozone aeration in the pretreatment tank 21. For this reason, the water treatment apparatus 1 can operate smoothly, and its performance is sufficiently exhibited.

Further, even if microorganisms used in the main processing tank 22 are mixed in the treated water recovered from the main processing tank 22, the microorganisms are killed by the ozone aeration in the final processing tank 23. Therefore, the natural environment such as a lake is not contaminated by the microorganisms used in the main treatment tank 22, and the microorganisms which do not originally survive in the lake water system where the water treatment apparatus 1 is installed. Can also be used without affecting its ecosystem.

FIG. 6 is a treatment system diagram (excluding a solar unit) showing a second embodiment of the water treatment apparatus of the present invention. The main difference between the water treatment apparatus 1A of the second embodiment and the first embodiment is that, in the second embodiment, the core unit 11A does not have a treatment tank, and instead purifies water. A filter medium 72 for propagating microorganisms having properties and an air diffuser 71 for releasing air bubbles are held in water in a water area requiring purification, and the air diffuser 71 is disposed below the filter medium 72, and the air blower 33 transmits the air from the air blower 33. The second embodiment is configured in the same manner as the first embodiment except that air is supplied to the air diffuser 71.

Here, as the core unit 11A, an air blower 33 capable of feeding air into the air diffuser 71 may be added to the core unit 11 described in the first embodiment.

The filter medium 72 of the second embodiment is held by a rope between a floating body 73 near the water surface and a lower weight 74. The air diffuser 71 is also held by a rope or the like between the floating body 73 near the water surface and the lower weight 74. The floating body 73 for the filter medium 72 and the air diffuser 71 is also used. As a result, the air diffuser 71 is disposed below the filter medium 72. The air diffuser 71 is connected to an air discharge port of the air blower 33 by an air supply pipe 76.

In the water treatment apparatus 1A of the second embodiment configured as described above, the aerobic microorganisms already living in the water and purifying the water quality are released by the air bubbles released from the air diffuser 71. When the filter medium 72 is aerated, it propagates on the surface of the filter medium 72. Oxygen dissolves in the water due to the air released from the air diffuser 71.

According to the water treatment apparatus 1A of the second embodiment, the effect of purifying the water quality is exhibited in the same manner as in the first embodiment. In addition, the second embodiment is more inexpensive because of its simple structure. There is also an effect that can be done. Further, since oxygen is dissolved into water by the air blower 33, there is also an effect that natural purification action is promoted. In this case, since the power source for operating the air blower 33 is the solar cell panel 5, there is an advantage that a commercial power source or an energy source such as oil is not particularly required.

In this second embodiment, as shown by the two-dot chain line in FIG.
It is preferable to enclose the upper and lower ends with open cylinders 75. As the cylindrical body 75, for example, a plastic plate or a water-resistant cloth can be used. The cylindrical body 75 may have a gap in a part thereof. In this way, when the side between the air diffuser 71 and the filter medium 72 is surrounded by the cylinder 75, the flow of water rising from the lower layer and passing through the filter medium 72 is strengthened, so that the circulation of water is strengthened, and the water quality by the filter medium 72 is improved. Purification is performed more effectively.

The present invention is not limited to the above embodiment. For example, the treatment tank may be submerged up to the top. In addition, the main processing tank may be formed of only the first tank, or may be formed of four tanks of the first to fourth tanks. Further, the solar unit may be one in which a plurality of solar cell panels and batteries are provided. Also,
The water treatment apparatus of the present invention may be used not only in freshwater lakes and the like, but also in brackish lakes and the like, in seawater bays, and the like.

[0054]

As described above in detail, according to the first aspect of the present invention, since the water treatment apparatus can be installed near the surface of the water area requiring purification, the water treatment apparatus can be installed on land. There is no need to secure a place. In addition, since a solar panel is used as a power source, there is no need to demand a power source for operation on land. Therefore, installation is very easy.

Further, since this water treatment apparatus floats near the water surface by a floating body, even if a lake or the like that requires purification is vast,
By appropriately moving the place, the entire water quality of a lake or marsh can be easily purified.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, microorganisms harmful to microorganisms used in the main treatment tank in raw water or in the main treatment tank. Even if there are zooplankton that eat the microorganisms used, they will be killed by ozone aeration in the pretreatment tank. For this reason, the water treatment device can operate smoothly and its performance can be sufficiently exhibited.

Further, even if the microorganisms used in the main treatment tank are mixed in the treated water recovered from the main treatment tank,
The microorganisms are killed by ozone aeration in the final treatment tank. For this reason, not only there is no danger that the natural environment such as lakes and mars are contaminated by the microorganisms used in the main treatment tank, even if the microorganisms do not originally survive in the lake water system where this water treatment device is installed, Can be used without affecting its ecosystem.

According to the third aspect of the present invention, in addition to the effect of the second aspect, the water treatment apparatus can be made compact by the core unit and the solar unit. Can be transported easily. Moreover, when the unit is to be installed near the water surface thereafter, these units are floated near the water surface by a crane or the like, towed to a predetermined installation water area by a ship, and then simply completed to complete the installation. Therefore, the construction period is extremely short, and the construction cost is reduced.

According to the fourth aspect of the present invention, in addition to the effect of the third aspect, the core unit and the solar unit can be moored in an arbitrary water area with an anchor, so that they can be swept by water current or wind. Don't worry about getting

According to the fifth aspect of the present invention, since the water treatment apparatus can be installed near the surface of the water area requiring purification, it is not necessary to secure the installation place on land. In addition, since a solar panel is used as a power source, there is no need to demand a power source for operation on land. for that reason,
Very easy to install.

In addition, since this water treatment apparatus floats near the water surface by a floating body, even if a lake or the like that requires purification is vast,
By appropriately moving the place, the entire water quality of the lake or the like can be easily purified. In addition, since oxygen is dissolved into water by the air blower, an effect of promoting a natural purification action can be expected. In addition, there is an advantage that it can be installed at a lower cost because the structure is simple.

According to the sixth aspect of the present invention, in addition to the effect of the fifth aspect of the present invention, the flow of water rising from the lower layer and passing through the filter medium is increased, so that the circulation of water is enhanced. Purification of water quality is performed more effectively.

According to the seventh aspect of the present invention, in addition to the effects of the fifth or sixth aspect, the core unit, the solar unit, the filter medium, and the air diffuser are moored to any water area by an anchor. Because they can, they do not have to worry about being swept away by water currents and wind.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a water treatment apparatus of the present invention.

FIG. 2 is a processing system diagram showing a core unit in the water treatment apparatus of FIG. 1;

FIG. 3 is a processing system diagram showing a solar unit in the water treatment apparatus of FIG. 1;

FIG. 4 is a plan view showing a core unit (with a cover of a treatment tank removed) of the water treatment apparatus of FIG.

FIG. 5 is a plan view showing a flow of water in the processing tank shown in FIG.

FIG. 6 is a treatment system diagram (excluding a solar unit) showing a second embodiment of the water treatment device of the present invention.

[Explanation of symbols]

 1 water treatment apparatus 1A water treatment apparatus (second embodiment) 11 core unit 11A core unit (second embodiment) 11a substrate 11b ... Cover 11c ... Floating body 12 ... Solar unit 12a ... Substrate 12b ... Floating body 13 ... Chain or rope 2 ... Treatment tank 21 ... Pretreatment tank 22: Main processing tank 22a: Main processing tank (first tank) 22b: Main processing tank (second tank) 22c: Main processing tank (third tank) 23: Last Treatment tank 24 ··· Water pipe 25 ··· Water pipe 26 ··· Water pipe 27 ··· Water passage section 28 ··· Filter medium 29a ··· Settling tank 29b ··· Settling tank 3 ···· Electric equipment 31 ·· Submersible pump 32 ··· Ozone generator 33 ··· Air Blower 4 Control device 41 Control panel 42 Inverter 5 Solar cell panel 51 Battery 61 Air diffuser 62 ·························································································· Filter media 73 ・ ・ ・ Floating body 74 ・ ・ ・ Weight 75 ・ ・ ・ ・ Cylinder 76 ・ ・ ・ ・ Air supply pipe

Claims (7)

[Claims] 1. A processing tank for purifying water, an electric device for operating the processing tank, a control device for controlling the operation of the electric device, a solar cell panel as a power supply, and a floating body. A water treatment apparatus, wherein the treatment tank, the electric equipment, the control device, and the solar cell panel are floated near the water surface by the floating body. 2. The treatment tank comprises a pretreatment tank, a main treatment tank, and a final treatment tank, wherein microorganisms for purifying water quality are held in the main treatment tank, and ozone is stored in the pretreatment tank and the final treatment tank. The water treatment apparatus according to claim 1, wherein the water treatment apparatus is supplied. 3. A core unit provided with the processing tank, the electric equipment and the control device, and a solar unit provided with the solar cell panel, wherein the core unit and the solar unit are respectively positioned near the water surface by the floating body. The water treatment device according to claim 2, wherein the water treatment device is configured to float. 4. The water treatment apparatus according to claim 3, wherein at least one of the core unit and the solar unit is provided with an anchor for mooring the core unit and the solar unit. 5. A core unit provided with an air blower for discharging air and a control device for controlling the operation of the air blower, a solar unit provided with a solar cell panel as a power supply, and a floating body. The solar unit is floated near the surface of the water by the floating body.On the other hand, a filter medium for breeding microorganisms having a property of purifying water and an air diffuser for releasing air bubbles are held in water, and the air diffuser is mounted on the filter medium. A water treatment apparatus, wherein air is supplied from the air blower to the air diffuser. 6. The water treatment apparatus according to claim 5, wherein the side between the air diffuser and the filter medium is surrounded by a cylinder whose upper and lower ends are open. 7. An anchor for mooring at least one of the core unit and the solar unit, the anchor unit for mooring the core unit and the solar unit, and the filter medium and the air diffuser. 7. The water treatment apparatus according to 6.