Water quality purification system

Abstract

The invention provides a water quality purification system capable of improving the water quality of a blue-green algae breeding water area. According to the present invention, provided is a water purification system provided with a floating island that floats on a water area and a cyanobacteria pulverizer connected to the floating island, the cyanobacteria pulverizer being configured so as to be able to pulverize cyanobacteria by applying an external force to cyanobacteria in water to be treated in the water area.

Description

Technical Field

[0001] The invention relates to a water purification system. Background Art

[0002] Patent Document 1 discloses a water purification device characterized in that a propeller provided on a floating body is rotated to beat the water surface so that oxygen is dissolved in the water area to activate microorganisms, thereby improving the natural purification ability of the water quality.

[0003] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Laid-Open No. 11-128990 Summary of the invention Technical problem to be solved by the invention In waters where blue algae are proliferating, the water purification effect of the technology of Patent Document 1 is sometimes insufficient, and therefore a system that can more effectively purify the water in such waters is desired.

[0004] The present invention has been completed in view of such a situation, and its object is to provide a water purification system capable of improving the water quality of water areas where blue algae breed.

[0005] Technical means for solving technical problems According to the present invention, the following inventions are provided.

[0006] [1] A water purification system comprising a floating island floating on a water area and a cyanobacteria crusher connected to the floating island, wherein the cyanobacteria crusher is configured to apply an external force to cyanobacteria in water to be treated in the water area to crush the cyanobacteria.

[0007] [2] The water purification system according to [1], wherein the blue algae crusher is configured to be operated by electricity generated by a solar panel mounted on the floating island.

[0008] [3] The water purification system according to [1] or [2], further comprising a foam glass arranged to be in contact with the water in the water area.

[0009] [4] The water purification system according to any one of [1] to [3], wherein the external force includes a shear force applied to the blue-green algae when the treatment target water passes through a narrow portion.

[0010] [5] The water purification system according to [4], wherein the external force also includes an impact force applied to the cyanobacteria when the treatment target water that is accelerated when passing through the narrow portion collides with a collision wall, and an impact force applied to the cyanobacteria based on cavitation generated when the treatment target water passes through the narrow portion.

[0011] [6] The water purification system according to any one of [1] to [5], wherein the blue algae crusher is suspended from the floating island.

[0012] [7] The water purification system according to any one of [1] to [6], wherein the blue algae crusher is arranged on the periphery of the floating island.

[0013] [8] The water purification system according to [3], wherein the foam glass is contained in a mesh bag and is sunk into the water area in this state.

[0014] According to the present invention, the cyanobacteria in the treatment target water are crushed by using a cyanobacteria crusher, so the water quality can be improved even in the water area where cyanobacteria are breeding. In addition, by floating the floating island on the water area, the area below the floating island becomes a shadow area, and the sound field of the cyanobacteria is suppressed. Therefore, the combination of the floating island and the cyanobacteria crusher can further promote the improvement of water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In Figure 1, Figure 1A A perspective view showing a state where the water purification system 10 according to the first embodiment of the present invention is installed in a water area R; Figure 1B for Figure 1A Magnified view of area B in FIG.

[0016] Figure 2 For viewing from the south Figure 1A The figure is near area B.

[0017] Figure 3 for Figure 2 A cross-sectional view of the blue algae crusher 6 in FIG.

[0018] Figure 4 for Figure 3 An enlarged view of the crushing section 6d in FIG.

[0019] Figure 5 A second configuration example of the pulverizing unit 6d is shown.

[0020] In Figure 6, Fig. 6A A perspective view showing a state where the blue algae crusher 6 is installed on a floating body taken out from the water purification system 10 of the second embodiment of the present invention, wherein the engaging portion 6h is omitted; Figure 6B for Fig. 6A A cross-sectional view through the locking component 12.

[0021] FIG. 7 shows a third configuration example of the pulverizing unit 6d.

[0022] FIG. 8 shows a state where the first component 6i and the second component 6j constituting the blue algae crusher 6 are mounted on the floating body 2 taken out from the water purification system 10 of the third embodiment of the present invention. Fig. 8AIt is a top view (partial cross-sectional view); Figure 8B Main view (partial section view).

[0023] In Figure 9, Fig.9A The second frame 61 is viewed from a direction perpendicular to the ground plane. Figure 8B A diagram of the second component 6j and its surrounding parts; Fig. 9B for Fig.9A BB section view in. DETAILED DESCRIPTION

[0024] Hereinafter, embodiments of the present invention will be described using the accompanying drawings. Various characteristic elements shown in the embodiments shown below can be combined with each other. Furthermore, each characteristic element can independently establish an invention.

[0025] 1. First Implementation Method As shown in Figure 1 to Figure 5 As shown, the water purification system 10 of the first embodiment of the present invention includes a floating island 1 floating on the water area R and a blue algae crusher 6 connected to the floating island 1. The water purification system 10 preferably includes a foamed glass 8 sunk in the water area R (see Figure 2 ).

[0026] <Waters R> The water area R refers to an area containing the water W to be treated that is to be purified, and examples thereof include: a reservoir, a pond, an adjustment pond, and other water storage tanks; or a lake or a swamp, and other marshes. The water area R is preferably a water area where cyanobacteria have already been produced or are expected to be produced. This is because the technical significance of using the water purification system 10 of this embodiment is significant at this time. Cyanobacteria is a general term for floating cyanobacteria, and examples of floating cyanobacteria include: Microcystis, Aphanizomenon, Anabaena, and the like. The area of ​​the water area R is, for example, 100 to 300,000 m 2 , preferably 500~100000m 2 Specifically, the area is, for example, 100m 2 , 500m 2 , 1000m 2 , 2000m 2 、3000m 2 5000m 2 , 10000m 2 , 50000m 2 , 100000m 2 、300000m 2, or a range between any two of the above values ​​or any value or more. The average depth of the water area R is, for example, 0.5 to 100 m, preferably 1 to 10 m. Specifically, the average depth is, for example, 0.5 m, 1.0 m, 1.5 m, 2.0 m, 2.5 m, 3.0 m, 3.5 m, 4.0 m, 4.5 m, 5.0 m, 6.0 m, 7.0 m, 8.0 m, 9.0 m, 10 m, 50 m, 100 m, or a range between any two of the above values.

[0027] <Floating Island 1> The floating island 1 is preferably formed by connecting a plurality of floating bodies 2. In the following description, the definitions of east (E), west (W), south (S), and north (N) are as follows: Figure 1A shown.

[0028] The plurality of floating bodies 2 are connected to each other directly or via a connection member 3. More specifically, two floating bodies 2 adjacent to each other in the north-south direction are directly connected, and two floating bodies 2 adjacent to each other in the east-west direction are connected to each other via a connection member 3.

[0029] For example, each float 2 is manufactured by blow molding in which a molten cylindrical parison is clamped and expanded using a plurality of split molds. Various thermoplastic resins can be used as the molding material, but preferably a polyolefin resin such as polyethylene or polypropylene can be used. The overall outer shape of the float 2 is rectangular (rectangular shape), and is configured to have a hollow portion inside for accommodating gas (air, etc.). The connector 3 is also formed by blow molding and is configured to have a hollow portion.

[0030] The floating body 2 is equipped with loads such as solar panels 4, cables, power conditioners, and junction boxes (loads other than the solar panels 4 are omitted in the figure). Most of the floating bodies 2 are equipped with solar panels 4, which can generate electricity. In order to improve the power generation efficiency, the solar panels 4 are installed in an inclined state with their light-receiving surfaces facing south. The electricity generated by the solar panels 4 is transmitted through cables. The direct current from multiple solar panels 4 is gathered to the junction box through cables, and the direct current from the junction box is converted into alternating current by the power conditioner. The junction box or power conditioner can also be set on the ground instead of on the floating body 2.

[0031] The floating bodies 2 arranged at the peripheral part of the floating island 1 are usually not equipped with solar panels 4 and the like, but are used for passages. Hereinafter, such floating bodies 2 are referred to as "peripheral floating bodies", and the remaining floating bodies 2 are referred to as "internal floating bodies".

[0032] The outer floating body 2A is configured to surround the inner floating body. Figure 2As shown, one end of a mooring member 5 such as an anchor cable is fixed to a part or all of the outer peripheral floating body 2A. The other end of the mooring member 5 is connected to an anchor sunk to the bottom G of a pool or lake, or is fixed to the land around the pool or lake. As a result, the floating body 2 is prevented from floating up or the floating island 1 is prevented from drifting.

[0033] The ratio of the area of ​​the floating island 1 to the area of ​​the water area R is, for example, 1~100%, specifically, 1%, 3%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, or a range between any two of the above values.

[0034] The floating island 1 may be fixed or movable. The water purification efficiency may be improved by moving the floating island 1 to stir the water in the water area R. For example, the floating island 1 may be composed of a fixed floating island and movable floating islands arranged around the fixed floating island, and the movable floating island may be rotated around the fixed floating island.

[0035] <Blue algae crusher 6> The cyanobacteria crusher 6 is connected to the floating island 1 and is configured to crush the cyanobacteria in the treatment target water W in the water area R by applying an external force. As an effect of connecting the cyanobacteria crusher 6 to the floating island 1, unlike the case where the cyanobacteria crusher 6 is set on land or on the bottom of the water, the positional relationship between the cyanobacteria crusher 6 and the water surface can be kept constant. Since the concentration of cyanobacteria tends to increase at a position 80 to 100 cm from the water surface, the effect of improving the crushing efficiency of cyanobacteria can be obtained by keeping the positional relationship between the cyanobacteria crusher 6 and the water surface constant.

[0036] The connection method is not particularly limited, and the cyanobacteria crusher 6 can be connected to the floating island 1 by a snap-fit ​​structure so that the cyanobacteria crusher 6 cannot move relative to the floating island 1, or, for example, the cyanobacteria crusher 6 can be suspended from the floating island 1 using a rope 7 to connect it to the floating island 1. The cyanobacteria crusher 6 is preferably arranged at the periphery of the floating island 1. Directly below the floating island 1, sunlight will be blocked by the floating island 1, so that cyanobacteria are difficult to breed. Therefore, the cyanobacteria concentration in the water area R around the floating island 1 is more likely to become higher than that directly below the floating island 1. By arranging the cyanobacteria crusher 6 at the periphery of the floating island 1, the cyanobacteria can be effectively crushed. At this time, it is preferred to connect the cyanobacteria crusher 6 to the peripheral floating body 2A.

[0037] The median diameter of the cyanobacteria before crushing is set to M1, and the median diameter of the cyanobacteria after crushing is set to M2. M1 is, for example, 30 μm or more, preferably 50 μm or more. M1 is, for example, 30 μm to 500 μm. Specifically, for example, it is 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, 500 μm, and it can also be a range between any two of the above values ​​or any value or more. M2 is, for example, 25 μm or less, preferably 20 μm or less. M2 is, for example, 1 μm to 25 μm, specifically, for example, 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, or a range between any two of the above values ​​or any value below. M2 / M1 is, for example, less than 0.5, preferably less than 0.3. This value is, for example, 0.001 to 0.5, specifically, for example, 0.001, 0.01, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, or a range between any two of the above values ​​or any value below. The median diameter of cyanobacteria can be measured using a laser diffraction / scattering particle size distribution (particle size distribution) measuring device (for example, manufactured by Horiba, Ltd., model LA-960).

[0038] Preferably, the cell wall (peptidoglycan wall) of the cyanobacteria is destroyed by crushing the cyanobacteria, thereby making it easier for microorganisms (preferably aerobic microorganisms) to prey on the cyanobacteria, thereby promoting water purification.

[0039] The blue algae crusher 6 is preferably configured to be operated by the power generated by the solar panel 4 mounted on the floating island 1. In this case, no external power supply is required, which can help reduce CO 2 emissions.

[0040] like Figure 3As shown, the blue algae crusher 6 preferably includes a frame 6a, a water inlet 6b, a pump 6c, a crushing part 6d and a discharge port 6e. The water inlet 6b and the discharge port 6e are arranged on the frame 6a, and the pump 6c and the crushing part 6d are arranged in the frame 6a. A filter 6f can be arranged between the water inlet 6b and the crushing part 6d. Through the action of the pump 6c, the treatment target water W contained in the water area R is sucked and supplied to the crushing part 6d through the filter 6f, and the blue algae are crushed by applying external force in the crushing part 6d, and the treated water obtained is discharged through the discharge port 6e. The frame 6a is provided with a ring-shaped connecting part 6g for connecting the rope 7. The filter 6f is arranged to prevent foreign matter that cannot pass through the narrow part 6d2 from entering the narrow part 6d2. In order to reduce the amount of foreign matter entering the frame 6a, a filter can also be arranged at the water inlet 6b. The number of crushing parts 6d arranged in the blue algae crusher 6 can be one or more. By providing a plurality of crushing parts 6d in the blue algae crusher 6 as in this embodiment, the crushing efficiency of blue algae can be improved. The pump 6c and the discharge port 6e can be provided corresponding to each crushing part 6d, or the plurality of crushing parts 6d can share the pump 6c and / or the discharge port 6e.

[0041] The depth of the water suction port 6b from the water surface is preferably 0 to 2.0 m, more preferably 0.4 to 1.4 m, and further preferably 0.6 to 1.2 m. Specifically, the depth is, for example, 0 m, 0.1 m, 0.2 m, 0.3 m, 0.4 m, 0.5 m, 0.6 m, 0.7 m, 0.8 m, 0.9 m, 1 m, 1.1 m, 1.2 m, 1.3 m, 1.4 m, 1.5 m, 2.0 m, or may be a range between any two of the above values. Since the concentration of cyanobacteria tends to increase near the water surface, the cyanobacteria can be effectively crushed by arranging the water suction port 6b at a position close to the water surface. Figure 3 In the embodiment, the water suction port 6b is arranged on the lower side of the discharge port 6e, but the water suction port 6b may be arranged on the upper side of the discharge port 6e.

[0042] The treated water discharged from the discharge port 6e can be used to cool the solar panel 4. Generally, the lower the temperature of the solar panel 4, the higher its power generation efficiency. Therefore, by cooling the solar panel 4, the power generation efficiency can be improved. As an example, a hose connected to the discharge port 6e at one end can be arranged on the lower side of the solar panel 4, and the treated water can be sprayed toward the back of the solar panel 4 from the hole provided on the side of the hose, thereby cooling the solar panel 4. In addition, by spraying the treated water on the lower part of each of the plurality of solar panels 4, the plurality of solar panels 4 can be cooled by one hose.

[0043] In the first structural example, Figure 4As shown, the crushing part 6d includes an inflow part 6d1, a narrow part 6d2, a collision wall 6d3, an outflow part 6d4, a first volume part 6d51 and a second volume part 6d52. By the action of the pump 6c, the treatment object water W flows in from the inflow part 6d1, passes through the first volume part 6d51, the narrow part 6d2 and the second volume part 6d52 in sequence, and then flows out from the outflow part 6d4. The flow area S1 of the narrow part 6d2 is smaller than the flow area S2 of the volume part (first volume part 6d51) on the upstream side of the narrow part 6d2 and the flow area S3 of the volume part (second volume part 6d52) on the downstream side of the narrow part 6d2. The value of S1 / S2 and / or S1 / S3 is preferably less than 0.5, and more preferably less than 0.2. The value is, for example, 0.001 to 0.5, specifically, for example, 0.001, 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, or a range between any two of the above values ​​or an arbitrary value below. The narrow portion 6d2 is preferably annular. The width W1 of the narrow portion 6d2 is less than 10 mm, preferably less than 5 mm, and more preferably less than 3 mm. W1 can be, for example, 0.0001 to 10 mm, specifically, for example, 0.0001 mm, 0.001 mm, 0.01 mm, 0.1 mm, 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 10 mm, or a range between any two of the above values ​​or an arbitrary value below. If the median diameter of the cyanobacteria before crushing is set to M1, the W1 / M1 value is, for example, 100 or less, preferably 50 or less. This value is, for example, 0.1 to 100, specifically, for example, 0.1, 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, and may be a range between any two of the above values ​​or less than any value.

[0044] The target water W is accelerated when passing through the narrow portion 6d2. At this time, shear force is applied to the cyanobacteria A contained in the target water W, and the cyanobacteria A is crushed. In addition, the collision wall 6d3 is arranged in the traveling direction of the target water W after passing through the narrow portion 6d2, and the target water W accelerated when passing through the narrow portion 6d2 becomes easy to collide with the collision wall 6d3 strongly. In addition, the impact force is applied to the cyanobacteria A contained in the target water W by the collision of the target water W and the collision wall 6d3, and the cyanobacteria A is further crushed. In addition, based on the cavitation generated when the target water W passes through the narrow portion, the impact force is applied to the cyanobacteria A, and the cyanobacteria A is further crushed. Cavitation is a physical phenomenon in which bubbles are generated in a short time based on the pressure difference in the flow of liquid and the bubbles disappear. Based on the drop in pressure, the water boils and / or based on the liberation of dissolved gas, fine bubbles (microbubbles and / or nanobubbles) with a diameter of less than 100μm are generated. The impact force is applied to the cyanobacteria A through the shock wave generated when these bubbles burst.

[0045] The crushing section 6d is preferably supplied with air. At this time, the generation of bubbles based on cavitation will be promoted. The supply of air can be carried out as follows: one end of the air pipe is connected to the crushing section 6d, and the other end is opened to the atmosphere. At this time, since the water to be treated flows through the crushing section 6d, the air will be sucked into the crushing section 6d. One end of the air pipe can be connected to the narrow section 6d2, the upstream side or the downstream side of the narrow section 6d2, but it is preferably connected to the upstream side of the narrow section 6d2. This is because the air passing through the narrow section 6d2 can promote the crushing of blue algae. The supply of air can also be actively carried out using a pump or the like. The number of bubbles generated based on cavitation is, for example, more than 10 million / mL, for example, 10 million to 1 billion / mL, preferably 100 million to 500 million / mL. The average particle size of the bubbles is, for example, 1 to 500 nm, preferably 10 to 100 nm, and more preferably 20 to 60 nm.

[0046] In this embodiment, the three external forces are applied to the cyanobacteria A, and the cyanobacteria A is effectively crushed. Alternatively, one or two of the three external forces may be applied to the cyanobacteria A instead of the three external forces.

[0047] In the second structural example, Figure 5As shown, the crushing part 6d includes an inflow part 6d1, a first narrow part 6d21, a second narrow part 6d22, a third narrow part 6d23, a first collision wall 6d31, a second collision wall 6d32, an outflow part 6d4, a first volume part 6d51, a second volume part 6d52, a third volume part 6d53 and a fourth volume part 6d54. By the action of the pump 6c, the treatment object water W flows in from the inflow part d1, and flows out from the outflow part 6d4 after passing through the first volume part 6d51, the first narrow part 6d21, the second volume part 6d52, the second narrow part 6d22, the third volume part 6d53, the third narrow part 6d23 and the fourth volume part 6d54 in sequence. The flow areas of the first narrow part 6d21, the second narrow part 6d22 and the third narrow part 6d23 are smaller than the flow areas of the respective upstream volume parts and the flow areas of the respective downstream volume parts. The first narrow portion 6d21 and the third narrow portion 6d23 are composed of circular holes arranged on the plate-shaped partition wall 6d6. The first narrow portion 6d21 and the third narrow portion 6d23 are arranged to be inclined relative to the flow direction from the inflow portion 6d1 to the outflow portion 6d4. The inclination angle of the first narrow portion 6d21 and the third narrow portion 6d23 is preferably 20 to 50 degrees, and more preferably 30 to 40 degrees. The second narrow portion 6d22 has a Venturi shape. The treatment object water W is accelerated when passing through the first narrow portion 6d21, the second narrow portion 6d22 and the third narrow portion 6d23 respectively. The treatment object water W after passing through the first narrow portion 6d21 collides with the first collision wall 6d31, and the treatment object water W after passing through the second narrow portion 6d22 collides with the second collision wall 6d32. Regarding other structures, the contents stated in the first structural example can also be applied to this structural example as long as they do not violate its purpose.

[0048] In the third structural example, as shown in FIG7 , the crushing section 6d includes an inflow section 6d1, a narrow section 6d2, an air supply section 6d7, an outflow section 6d4, a first volume section 6d51, and a second volume section 6d52. By the action of the pump 6c, the treatment target water W flows in from the inflow section 6d1, passes through the first volume section 6d51, the narrow section 6d2, and the second volume section 6d52 in sequence, and then flows out from the outflow section 6d4. The flow area S1 of the narrow section 6d2 is smaller than the flow area S2 of the volume section (the first volume section 6d51) on the upstream side of the narrow section 6d2 and the flow area S3 of the volume section (the second volume section 6d52) on the downstream side of the narrow section 6d2.

[0049] The water W to be treated is accelerated when passing through the narrow portion 6d2. At this time, shear force is applied to the blue algae contained in the water W to be treated, and the blue algae are crushed. In addition, the air supply part 6d7 has an air flow path 6d8 configured to supply air to the water W to be treated. The air flow path 6d8 is configured so that one end 6d9 thereof is open to the atmosphere and the other end 6d10 faces the flow path of the water W to be treated. If the water W to be treated moves in the flow path of the crushing part 6d, the air will be drawn into the water W to be treated and thus supplied to the water W to be treated. The crushing or decomposition of the blue algae is promoted by the supply of air. The other end 6d10 is preferably configured to face the second volume part 6d52 (preferably a position in the second volume part 6d52 adjacent to the narrow portion 6d2).

[0050] The narrow portion 6d2 becomes narrowest in front of the air supply portion 6d7. The diameter of the second volume portion 6d52 becomes larger than the narrow portion 6d2 at the boundary with the narrow portion 6d2, and gradually becomes smaller as it moves away from the narrow portion 6d2. The diameter of the second volume portion 6d52 becomes smallest at the reduced diameter portion 6d16, and gradually becomes larger as it moves from the reduced diameter portion 6d16 toward the outflow portion 6d4. If the portion where the diameter of the first volume portion 6d51 decreases toward the narrow portion 6d2 is set as the first inclined portion 6d17, the portion where the diameter of the second volume portion 6d52 decreases toward the reduced diameter portion 6d16 is set as the second inclined portion 6d18, and the portion where the diameter of the second volume portion 6d52 increases from the reduced diameter portion 6d16 toward the outflow portion 6d4 is set as the third inclined portion 6d19, then the absolute value of the inclination angle of the first inclined portion 6d17 is greater than the absolute value of the inclination angle of the second inclined portion 6d18 and the absolute value of the inclination angle of the third inclined portion 6d19.

[0051] Preferably, the air flow path 6d8 has a plurality of other ends 6d10, and the plurality of other ends 6d10 are arranged at intervals in the circumferential direction. The number of the plurality of other ends 6d10 is, for example, 2 to 12, preferably 4 to 8 (6 in this embodiment). The plurality of other ends 6d10 are preferably arranged at equal intervals in the circumferential direction.

[0052] The air flow path 6d8 includes an annular flow path 6d11 configured as an annular shape, a first flow path 6d12 connecting the annular flow path 6d11 and one end 6d9, and a second flow path 6d13 connecting the annular flow path 6d11 and the other end 6d10. The second flow paths 6d13 are provided corresponding to each other end 6d10, so that the number of second flow paths 6d13 is equal to the number of other ends 6d10. The second flow path 6d13 becomes thinner toward the other end 6d10. The narrow portion 6d2 is disposed in the cylinder 6d14, and an annular mixing space 6d15 is provided outside the cylinder 6d14. Figure 7BAs shown, the direction of the second flow path 6d13 is preferably offset from the direction A1 toward the center of the narrow portion 6d2, and more preferably coincides with the tangent direction A2 of the outer peripheral surface of the cylinder portion 6d14. With this structure, the treatment target water W and air can be effectively stirred.

[0053] <Foamed glass 8> The foamed glass 8 is a foamed body of glass, which can be produced by crushing the glass, adding a foaming agent, and then melting and foaming it in a sintering furnace. From the perspective of environmental protection, waste glass is preferably used as the raw material. The foamed glass 8 is a porous body with a large surface area, so it is easy to become a home for microorganisms. Therefore, by sinking the foamed glass 8 into the water area R, the microorganisms can be increased, and the microorganisms can be promoted to prey on the crushed cyanobacteria A. The foamed glass 8 is preferably granular. The average particle size of the foamed glass 8 is preferably 3~8mm, more preferably 4~7mm, and further preferably 5~6mm. The average particle size means the average value of the equivalent spherical diameters of 100 particles randomly selected from particles with an equivalent spherical diameter of 1mm or more.

[0054] Furthermore, air is preferably supplied to the foamed glass 8. In this case, the number of aerobic microorganisms that use the foamed glass 8 as a residence can be increased. The specific gravity of the foamed glass 8 is, for example, 0.3 to 1.6, preferably 0.3 to 0.6, specifically, for example, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, and may be a range between any two of the above values. The foaming ratio of the foamed glass 8 is, for example, 1.5 to 10 times, specifically, 1.5 times, 2.0 times, 2.5 times, 3.0 times, 3.5 times, 4.0 times, 4.5 times, 5.0 times, 5.5 times, 6.0 times, 6.5 times, 7.0 times, 7.5 times, 8.0 times, 8.5 times, 9.0 times, 9.5 times, and 10.0 times, or it can be a range between any two of the above values.

[0055] The foamed glass 8 preferably has continuous bubbles. At this time, even when the specific gravity of the foamed glass 8 is less than 1, water can penetrate into the continuous bubbles, so that the foamed glass 8 can be sunk in the water. The amount of foamed glass 8 used relative to 1m³ of water in the water area R is preferably 0.0001~0.2m³, more preferably 0.0005~0.1m³, and further preferably 0.001~0.02m³. The amount of foamed glass 8 used relative to 1m³ of water in the water area R is, for example, 0.0001 m³, 0.0005 m³, 0.001 m³, 0.005m³, 0.01 m³, 0.02 m³, 0.05 m³, 0.1 m³, 0.2m³, and may also be a range between any two of the above values.

[0056] As long as the foam glass 8 is configured to be in contact with the water in the water area R, it can be sunk in the water area R, and it can also be sucked by a pump or the like and made to contact the foam glass 8 without being sunk in the water area R. When the foam glass 8 is sunk in the water area R, it can be directly spread in the water area R and sunk, but it is preferred to put the foam glass 8 in a mesh bag 9 and sunk it in the water area R in this state. In the case of the latter, there is an advantage that the foam glass 8 can be easily recovered or replaced. In addition, the mesh bag 9 containing the foam glass 8 is preferably fixed to an anchor 11 provided at the bottom of the water area R. At this time, the mesh bag containing the foam glass 8 is prevented from drifting to other places. The anchor 11 is preferably connected to a buoy. By making the buoy float on the water surface, it is easy to determine the position of the sunken foam glass 8.

[0057] As an example, the foaming glass 8 can be contained in a container. In this case, a pump or the like can be used to draw water from the water area R and supply it to the container so that the water in the water area R contacts the foaming glass 8. The water in the container can be discharged using a pump, or it can be discharged through an opening provided in the bottom wall or the side wall of the container. As an example, the treated water discharged from the cyanobacteria crusher 6 can be directly supplied to the container. In this case, the decomposition of the cyanobacteria crushed by the cyanobacteria crusher 6 is easily promoted. The container containing the foaming glass 8 can be set on land, can be set on the floating island 1, or can be floated in the water area R.

[0058] 2. Second Implementation Method refer to Fig. 6A and Figure 6B A water purification system 10 according to a second embodiment of the present invention will be described. This embodiment is similar to the first embodiment, and the contents described in the first embodiment can also be applied to this embodiment unless they violate the gist thereof.

[0059] In this embodiment, the blue algae crusher 6 is disposed in the opening 2a provided in the floating body 2. The blue algae crusher 6 is preferably fixed to the floating body 2 so as to be movable up and down relative to the floating body 2. At this time, by moving the blue algae crusher 6 up and down, the blue algae crusher 6 can be adjusted. Figure 3 The position of the water suction port 6b shown in the figure can improve the purification efficiency, or the operability of the installation and maintenance of the blue algae crusher 6 can be improved. In addition, the blue algae crusher 6 can be suspended from the floating body 2 in a manner that it is sunk below the opening 2a. In this case, compared with the case where the blue algae crusher 6 is suspended from the outside of the floating body 2, the inclination of the floating body 2 due to the gravity of the blue algae crusher 6 can be suppressed. In addition, compared with the case where the blue algae crusher 6 is suspended from the lower surface of the floating body 2 without an opening, it is easier to fish out the blue algae crusher 6.

[0060] As an example, Figure 6BAs shown, the floating body 2 is provided with a locking component 12. The locking component 12 is configured to be switchable between a state in which it is engaged with an engaging portion 6h provided on the cyanobacteria crusher 6 and a state in which it is released from engagement. For example, the above-mentioned switching can be performed by sliding the locking component 12. Thus, if the engagement is released by the locking component 12, the cyanobacteria crusher 6 can be moved up and down. In addition, the engaging portion 6h can be provided at a plurality of height positions of the cyanobacteria crusher 6 that are separated from each other in the up and down direction. At this time, by changing the engaging portion 6h engaged with the locking component 12, the position of the cyanobacteria crusher 6 can be changed in the up and down direction. As a combination of the locking component 12 and the engaging portion 6h, for example, a combination of a pin and a hole into which the pin can be inserted can also be used.

[0061] The blue algae crusher 6 is preferably installed on the floating body 2 at the opening 2a. Figure 2 The mooring member 5 shown. If the mooring member 5 is installed on the floating body 2 having the opening 2a, the mooring member 5 is easily deformed when a large horizontal load is applied to the floating body 2, but by installing the blue algae crusher 6 in the opening 2a, the deformation of the floating body 2 can be suppressed. As a result, the mooring strength of the floating island 1 can be improved.

[0062] 3. Third Implementation Method Referring to Fig. 8 and Fig. 9, the water purification system 10 of the third embodiment of the present invention is described. This embodiment is similar to the first and second embodiments, and the contents described in the first and second embodiments can also be applied to this embodiment as long as they do not violate their purpose. The following focuses on the differences.

[0063] In the present embodiment, the cyanobacteria pulverizer 6 is divided into a first component 6i and a second component 6j. The first component 6i includes a first frame 6k and a pump 6c. The pump 6c is arranged in the first frame 6k. The second component 6j includes a second frame 6l and a crushing unit 6d. The crushing unit 6d is arranged in the second frame 6l. The second frame 6l includes a frame body 6l1 and a cover 6l2 covering its opening. The first component 6i and the second component 6j are connected to each other through a pipe 6r. The cyanobacteria pulverizer 6 of the first and second embodiments may sometimes be too heavy to be carried, but in the present embodiment, the pump 6c and the crushing unit 6d, which are particularly heavy in the cyanobacteria pulverizer 6, are arranged in different components, respectively, and the first component 6i and the second component 6j are both lighter than the cyanobacteria pulverizer 6 of the first and second embodiments. According to the present embodiment, the first component 6i and the second component 6j are transported separately and installed on the floating body 2, and then the first component 6i and the second component 6j are connected using the pipe 6r, so that the blue algae crusher 6 can be installed on the floating body 2 without transporting a heavy integrated blue algae crusher 6. The crushing part 6d can adopt any structure of the first to third structural examples, but the third structural example is preferably adopted.

[0064] The blue algae crusher 6 has a plurality of second components 6j, and these second components 6j are connected to the first component 6i via pipes 6r, respectively. If this structure is adopted, a plurality of second components 6i can be used to process the treatment object water W sucked by a first component 6i, so the crushing efficiency of blue algae can be improved. A plurality of pumps 6c can be provided in the first component 6i, or a single pump 6c can be provided. In the case where a plurality of pumps 6c are provided, each pump 6c can be connected to each second component 6j. In the case where a single pump 6c is provided, the treatment object water W sucked by a single pump 6c can be branched and supplied to a plurality of second components 6j. In the case where a plurality of pumps 6c are provided, the crushing efficiency of blue algae can be improved, and in the case where a single pump 6c is provided, the equipment cost can be reduced.

[0065] One end of the pipe 6r is connected to the pump 6c in the first component 6i, and the other end is connected to the crushing part 6d in the second component 6j, so that the treatment target water W sucked by the pump 6c can be transported to the crushing part 6d. A plurality of (two in this embodiment) crushing parts 6d are provided in the second component 6j, and these crushing parts 6d are connected to the pipe 6r via a branch pipe 6m. The root of the branch pipe 6m is preferably inserted into the opening of the side wall 6l3 provided in the second frame 6l. This is because the root of the branch pipe 6m is supported by the side wall 6l3 at this time. In this way, the treatment target water W flowing through one pipe 6r can be processed by a plurality of crushing parts 6d, thereby improving the crushing efficiency of blue algae. The crushing part 6d can be fixed to the second frame 6l by a fixing plate 6q. The fixing plate 6q preferably has a portion 6q1 arranged on the upper side of the crushing part 6d and a portion 6q2 fixed to the second frame 6l. The fixing plate 6q can be fixed to the second frame body 61 by means of screws 6t, for example.

[0066] The first component 6i is preferably provided at the opening 2a of the floating body 2. In the present embodiment, the first component 6i can be provided by fixing the brackets 6n and 6o on the first frame 6k of the first component 6i, inserting the first frame 6k into the opening 2a so that the brackets 6n and 6o abut against the floating body 2 to prevent the first frame 6k from falling. In this way, it is easy to load and unload the first component 6i on the floating body 2. The floating body 2 includes a floating body main body 2b and a vertical portion 2c. The vertical portion 2c is connected to the floating body main body 2d via a hinge portion 2d provided at a position adjacent to the opening 2a of the floating body main body 2b. The floating body 2 can be manufactured as follows: integrally mold a molded body in which the vertical portion 2c is in a horizontally fallen state and the floating body main body 2b and the vertical portion 2c are both in a central control shape, cutting three sides around the vertical portion 2c in the molded body, and erecting the vertical portion 2c with the remaining one side as the hinge portion 2d. The portion of the molded body where the horizontally lying upright portion 2c is provided becomes the opening portion 2a after the upright portion 2c is erected. The opening portion 2a and the upright portion 2c are arranged in the recessed portion 2e provided in the floating body main body 2d. The bracket 6n is placed on the upright portion 2c. The bracket 6o is arranged on the side of the first member 6i opposite to the bracket 6n. The bracket 6o is placed on the bottom surface of the recessed portion 2e.

[0067] The second component 6j is preferably disposed on the floating body 2. Nuts (not shown) for connecting the floating bodies 2 are embedded on the floating bodies 2, and the second component 6j can be disposed on the floating body 2 by fixing the metal part 6p to the nut and fixing the metal part 6p to the second frame 61.

[0068] The part on the outflow portion 6d4 side of the crushing part 6d is preferably inserted into the opening of the side wall 6l4 provided in the second frame 6l. The side wall 6l4 is preferably opposite to the side wall 6l3. If the outflow portion 6d4 is located at a position higher than the water surface, the treated water obtained by crushing the blue algae will collide with the water surface and make a sound. Therefore, in order to reduce the generation of such sound, it is preferred to connect the pipe 6u to the outflow portion 6d4 and arrange the end of the pipe 6u at a position lower than the water surface. In addition, the pipe 6u is preferably inclined in a manner away from the floating body 2 (especially the water suction port 6b). At this time, the treated water is discharged in a manner away from the floating body 2, so the proportion of untreated blue algae contained in the treated water W sucked from the water suction port 6b is increased. In addition, by discharging the treated water in a manner away from the floating island 2, the water in the floating water area R of the floating body 2 is stirred, and based on this viewpoint, the proportion of untreated blue algae contained in the treated water W sucked from the water suction port 6b can also be increased. Furthermore, on the side of the first frame 6k opposite to the side on which the pipe 6u is provided ( Figure 8B The water suction port 6b is arranged at a position away from the end of the pipe 6u, so that the proportion of untreated cyanobacteria contained in the treatment target water W can be increased by sucking the treatment target water W from the water suction port 6b.

[0069] 4. Other implementation methods In places where the concentration of blue algae is extremely high or when it is desired to maintain a high purification efficiency, a device for supplying air in the form of nanobubbles can also be provided at the same time, thereby further improving the water purification efficiency.

[0070] In the first to third embodiments, the frame of the blue algae crusher 6 may be omitted when not necessary. For example, in the first embodiment, the frame 6a may be omitted and the pump 6c may be suspended by the rope 7. In this case, for example, the filter 6f may be installed at the water intake of the pump 6c.

[0071] Example Use Figure 1 to Figure 4 The water purification system 10 shown has an area of ​​1319.585m 2 The water quality of the reservoir with a depth of 6.8m when full of water was purified. The floating island 1 was arranged in the center of the reservoir in a manner covering 5.4% of the area of ​​the reservoir, and a cyanobacteria crusher 6 was arranged near the north end of the floating island 1. Six solar panels 4 were arranged on the floating island 1. The cyanobacteria crusher 6 was set so that the position of the water inlet 6b was 80cm away from the water surface. The glass foam material (foamed glass 8) was scattered in the area except for the area directly below the floating island 1. As the glass foam material, a material with a specific gravity of 0.3~0.6 and continuous bubbles was used. The amount of glass foam material scattered was set to 12m³ (3.6t). The width of the narrow part 6d2 of the cyanobacteria crusher 6 was set to 3mm. The processing capacity of each cyanobacteria crusher 6 was set to 50L / minute. The cyanobacteria crusher 6 was operated by the power generated by the solar panel 4.

[0072] The water purification system 10 was operated for six months, and the median diameter, redox potential, and transparency of the cyanobacteria were measured before and after the operation. Regarding the median diameter of the cyanobacteria, it changed from 81 μm to 11 μm before and after the operation. Regarding the redox potential, it changed from 202 mV to 126 mV before and after the operation. Regarding the transparency, it changed from 80 cm to 4.5 m before and after the operation.

[0073] Based on the above results, it can be seen that the water purification system has greatly improved the water quality of the reservoir.

[0074] Description of Reference Numerals 1- floating island; 2- floating body; 2A- peripheral floating body; 2a- opening; 2b- floating body body; 2c- erection part; 2d- hinge part; 2e- recessed part; 3- connector; 4- solar panel; 5- mooring part; 6- blue algae crusher; 6a- frame; 6b- water inlet; 6c- pump; 6d- crushing part; 6d1- inflow part; 6d2- narrow part; 6d21- first narrow part; 6d22- second narrow part; 6d 23-third narrow part; 6d3-collision wall; 6d31-first collision wall; 6d32-second collision wall; 6d4-outflow part; 6d51-first volume part; 6d52-second volume part; 6d53-third volume part; 6d54-fourth volume part; 6d6-partition wall; 6d7-air supply part; 6d8-air flow path; 6d9-one end; 6d10-other end; 6d11-annular flow path; 6d12- First flow path; 6d13-second flow path; 6d14-cylinder; 6d15-mixing space; 6d16-narrow neck; 6d17-first inclined portion; 6d18-second inclined portion; 6d19-third inclined portion; 6e-discharge port; 6f-filter; 6g-connecting portion; 6h-engaging portion; 6i-first component; 6j-second component; 6k-first frame; 6l-second frame; 6l1-frame body; 6l2 -cover; 6l3-side wall; 6l4-side wall; 6m-branch pipe; 6n-bracket; 6o-bracket; 6p-metal parts; 6q-fixing plate; 6q1-part; 6q2-part; 6r-piping; 6t-small screw; 6u-piping; 7-rope; 8-foam glass; 9-net bag; 10-water purification system; 11-anchor; 12-locking part; A-cyanobacteria; G-bottom; R-water area; W-water to be treated.

Claims

1. A water purification system comprising a floating island floating on a water area and a blue algae crusher connected to the floating island, It is characterized in that The blue algae crusher is configured to apply external force to the blue algae in the treatment target water in the water area to crush the blue algae.

2. The water purification system according to claim 1, It is characterized in that The blue algae crusher is configured to be operated by electricity generated by a solar panel mounted on the floating island.

3. The water purification system according to claim 1, It is characterized in that A foam glass is further provided, which is arranged to be in contact with water in the water area.

4. The water purification system according to any one of claims 1 to 3, It is characterized in that The external force includes a shear force applied to the blue algae when the treatment target water passes through the narrow portion.

5. The water purification system according to claim 4, It is characterized in that The external force also includes an impact force applied to the blue algae when the treatment target water accelerated when passing through the narrow portion collides with a collision wall and an impact force applied to the blue algae due to cavitation generated when the treatment target water passes through the narrow portion.

6. The water purification system according to claim 1, It is characterized in that The blue algae crusher is suspended on the floating island.

7. The water purification system according to claim 1, It is characterized in that The blue algae crusher is arranged at the peripheral portion of the floating island.

8. The water purification system according to claim 3, It is characterized in that The foamed glass is contained in a mesh bag and sunk into the water area in this state.

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