JPH0857478A - Method and apparatus for purifying liquid containing plankton - Google Patents

Abstract

PURPOSE: To purify water by efficiently killing plankton by pressurizing water containing plankton of a reservoir by a pressure pump to eject the same from a jet nozzle and allowing this jet stream to collide with a barrier plate to destruct the cell of plankton. CONSTITUTION: A liquid purifying apparatus 1 is supported on a base ship 2 movable on the surface of the water and a dust extractor for removing foreign matter in water is arranged to the intake port opened to the surface of the water and a pressure pump sending water to a filtrate sump under pressure is arranged. The emitting port of the pressure pump is connected to the jet nozzle of an impact algicidal device 4 through a pipeline 3. Further, a barrier plate 7 is arranged in front of the jet orifice 6 of the jet nozzle 5 in a revolvable manner through a shaft 8. Plankton-containing water of a reservoir is pressurized by the pressure pump to be ejected from the jet nozzle 5 and this jet stream is allowed to collide with the barrier plate 7 to destruct the cell of plankton. By this constitution, plankton is efficiently killed to purify water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for purifying a liquid containing plankton, for example, a method and an apparatus for purifying water in a reservoir and / or a lake, and more particularly to a method and apparatus for removing plankton which survive in water. TECHNICAL FIELD The present invention relates to a destruction method and an apparatus thereof, and more particularly to a method and an apparatus for efficiently algae-killing plankton accumulated in a floc shape.

[0002]

2. Description of the Related Art Conventional purification treatment of a liquid containing plankton, for example, purification treatment of water containing microorganisms floating in water such as reservoirs, lakes and rivers, that is, plankton, is carried out by an ultraviolet lamp in water (main wavelength 253.7 nm). Is installed and water is passed near the lamp to perform irradiation treatment, or a chemical substance such as ozone is dissolved in water to act on plankton to be chemically treated, or pressurized water from a nozzle under atmospheric pressure. There is a method of destroying plankton by killing the plankton and stopping the growth of the plankton by a method of injecting the plankton and physically treating it by a rapid pressure change.

[0003]

However, in any of the methods, the effect of killing and / or destroying the plankton, that is, the algicidal effect may vary depending on the type and characteristics of the plankton, and thus the efficient treatment is not always required. Not really. For example, Microcystis (commonly known as Aoko), which is often found in reservoirs and lakes, is a plankton that floats and accumulates near the surface of the water to form flocs. The efficiency of killing and destroying plankton by ozone and ozone will decrease. In addition, physical cell destruction of plankton due to rapid pressure change due to pressure injection and plankton death due to cell destruction also cause large differences depending on the type of plankton, both of which are inefficient algicidal treatment methods. is there.

As described above, none of the conventional plankton killing techniques is an efficient plankton killing process that corresponds to the type and characteristics of the plankton, that is, an algae killing process. Particularly, in the case of plankton accumulated in the form of flocs, the irradiation efficiency of ultraviolet rays and the action efficiency of ozone are poor, and the physical destruction efficiency by a fountain is not sufficient. An object of the present invention is to solve the problems associated with conventional algae killing treatment using ultraviolet rays, ozone, fountains and the like.

[0005]

In order to solve the above problems, the present invention aims to develop a more efficient plankton algae killing method and plankton algae killing apparatus.
It was completed as a result of various studies. The present invention provides a method and an apparatus capable of highly efficient algae killing corresponding to the type and characteristics of plankton existing in water.

That is, the present invention pressurizes a liquid containing plankton, jets the pressurized liquid containing plankton to form a jet of liquid containing plankton, and applies the formed jet to a solid surface. In the method for purifying a liquid containing plankton, which is characterized by destroying a part of cells of plankton in the liquid, the present invention also pressurizes a liquid containing plankton partially forming flocs, A liquid containing pressurized plankton is jetted to form a jet of liquid containing plankton, which jet is applied to the impact surface to destroy some of the plankton's cells in the liquid, and then A method for purifying a liquid containing plankton is characterized in that a liquid containing plankton is irradiated with ultraviolet rays.

Further, according to the present invention, a liquid pressurizing device having a suction port and a discharge port and a liquid jet nozzle connected to the discharge port of the liquid pressurizing device are provided, and the liquid jet nozzle is provided in front of the jet port. And a liquid impact device provided with an impact member provided separately from the injection nozzle, and a liquid purification device including a plankton, wherein the present invention also provides a suction port and A liquid pressure device having a discharge port, a liquid jet nozzle connected to the discharge port of the liquid pressure device, and an impact member provided in front of the liquid jet nozzle and apart from the jet nozzle. And a liquid ultraviolet irradiation device in which an ultraviolet lamp is provided adjacent to a liquid flow path connected to a liquid outlet of the liquid impact device. In purifier of liquid containing Rankuton.

In the present invention, plankton means dinoflagellate, green algae, cyanobacteria, diatom and euglena algae and other organisms that cause so-called red tide and water-bloom. In the present invention, the liquid containing plankton is pressurized by a pump that continuously supplies water. In the present invention, the water pressurized in this way is ejected from the nozzle into the external space, and a sudden pressure change is given to the plankton in the water. Here, the jetted water with air bubbles inside the plankton individual hits the solid surface and impacts the contained plankton, destroying some of the plankton cells,
Destroy Plankton's Flock and disperse it into individual plankton.

In this way, the water containing the plankton is applied to the solid surface, the flocs are destroyed by the impact, and the plankton is dispersed. The water in which the plankton is dispersed in this way is caused to flow through the flow path provided with the ultraviolet irradiation region, and the plankton is destroyed by the ultraviolet rays irradiated in the ultraviolet irradiation region. The plankton destroyed in this way has lost the ability to grow and does not grow in water.

In the present invention, the rate of destruction of the underwater plankton flocs increases with the magnitude of the pressure applied to the water. For example, plankton (microcystis) accumulated in a floc shape of several tens of microns to several hundreds of microns is pressurized, jetted, and impacted to give 10
The following Table 1 shows the actual measurement results of the floc fracture rate when the particles are crushed and dispersed to a size of micron or less.

[0011]

In the example of Table 1, the water pressure is set to 0.4, 0.55 and 0.7 MPa by using the injection nozzle having the hole diameter of 1.2 mm, and the water is injected under pressure to obtain a high pressure of 20 to 30 m / sec. The fracture rate of plankton flocs was measured when a jet having a flow velocity was formed and when the jet was collided with an impact plate fixed near the front of the nozzle. The measured data in Table 1 shows that a higher floc destruction rate can be obtained in the case of pressurizing, injecting, and further applying an impact, as compared with the case of pressurizing and injecting.

In the present invention, the water containing plankton is pressurized to a pressure of 0.4 MPa or more. However, it is preferable to pressurize the water containing plankton to a pressure of 0.55 MPa or more because the fracture rate of the flocs can be further increased, and pressurize to 0.7 MPa or more to reduce the fracture rate of the flocs. It is preferable because it can be sufficiently achieved.

Table 2 shows that a jet nozzle having a hole diameter of 1.2 mm was used to pressurize and jet water at a pressure of 0.7 MPa.
The cell destruction rate was actually measured when a jet flow having a high flow rate of 20 to 30 m / sec was formed and when the jet flow was collided with an impact plate fixed near the front of the nozzle. Cell destruction rate is plankton (microcystis)
It is determined by the presence or absence of cell membrane destruction.

[0015]

From these results, the algicidal treatment by the combination of the pressurizing step, the jetting step and the impacting step of the present invention is compared with the algicidal treatment by the pressurizing step, or the algalicidal treatment by the combination of the pressing step and the jetting step. Therefore, a very high cell destruction rate can be achieved, and plankton in water can be killed in a relatively short time. The plankton treatment by the combination of the pressure step, the injection step, and the impact step of the present invention efficiently achieves plankton dispersion by plankton floc destruction and plankton cell destruction at the same time. Further, regarding the plankton which survived without being killed by the plankton treatment by the combination of the pressure step, the injection step, and the impact step of the present invention, the flocs are destroyed and the plankton are individually dispersed, so that the ultraviolet irradiation is performed. Efficient algicidal treatment is possible.

In the present invention, the impact process is performed by applying the jet flow to the solid surface, but since the jet flow has a high flow velocity, the jet flow is strongly repelled from the solid surface and the plankton adheres to the tip of the injection nozzle. Therefore, in the present invention, the solid surface is provided so as to be inclined with respect to the injection nozzle. The inclination angle of the solid surface is formed at an angle of 5 to 40 ° with respect to the vertical surface of the injection nozzle, but the jet flow hits the solid surface because the jet flow is made to collide at high pressure and at a close range. Rather, it is preferable that the jet flow is pressed against the solid surface and the solid surface is inclined downward by an angle of 10 to 30 ° so that the flow can be directed downward.

In the present invention, the jet flow that collides with the solid surface in the impact process is sent to the ultraviolet irradiation region. The ultraviolet irradiation area is formed to be a mirror surface around the ultraviolet irradiation area in order to prevent the ultraviolet rays from leaking to the surroundings and to repeatedly and effectively act the ultraviolet rays on the plankton. An ultraviolet ray irradiation area is formed by inserting an ultraviolet ray lamp into a cylindrical tube whose periphery is formed as a mirror surface. Since ultraviolet light is absorbed by water, it is preferable to increase the density of the ultraviolet lamp in the ultraviolet irradiation area. In the present invention, the algaecide device,
The water of the reservoir and lakes will be purified by supporting it on the hulls of berths and floats.

[0019]

The present invention pressurizes a liquid containing plankton,
By injecting the liquid containing the pressurized plankton, a jet of the liquid containing plankton is formed, and the formed jet is applied to the solid surface to destroy some of the plankton cells in the liquid. It is possible to disperse plankton accumulated in the form of flocs into pieces and destroy cells.

Further, according to the present invention, since the flocs and plankton can be destroyed at a high destruction rate,
Purification of water containing plankton can be carried out easily and easily. Further, by repeating the pressurization step, the injection step and the impact step of the present invention, it is possible to increase the algaecidal accuracy of the plankton, and by combining the algaecidal treatment with ultraviolet irradiation, the plankton can be destroyed at a higher destruction rate. It can be easily destroyed and the water containing plankton can be purified in a relatively short time.

The present invention has a simple structure including a liquid pressurizing device, a liquid jetting nozzle and a liquid impacting device, and pressurizes a liquid containing plankton accumulated in a floc shape and jets it toward a solid surface, Since the flocks of the plankton can be destroyed by the impact to disperse the individual plankton in the disjointed state, by providing the liquid ultraviolet irradiation device connected to the liquid outlet of the liquid impact device, The algicidal treatment can be carried out efficiently, and a high algalicidal rate will be achieved. Moreover, at the same time, in some plankton, the cell membrane is destroyed and the proliferative function is lost.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the accompanying drawings, but the present invention is not limited to the following description and examples. FIG. 1 is a partial explanatory view mainly showing a pressurizing step, an injecting step, an impact step, and an ultraviolet ray irradiating step in one embodiment of the liquid purifying apparatus of the present invention.

In FIG. 1, the liquid purification apparatus 1 is supported by a movable carrier 2 on the water surface of a reservoir or lake. The liquid purification apparatus 1 is provided with an intake port (not shown) opened on the surface of the water, and a dust remover or a strainer (strainer) is provided at the intake port to remove foreign matters in the water of a reservoir or lake. (Not shown). A pressure pump (not shown) for pressurizing and pumping water from a reservoir or lake to the dust collector or strainer filtrate reservoir.
Is provided.

In this example, the discharge port of this pressurizing pump is connected to the injection nozzle 5 of the impact algae killing device 4 via the pipe line 3. An impact plate 7 is provided in front of the ejection port 6 of the ejection nozzle 5. In this example, the hole diameter of the jet nozzle is 1.2 mm, and the velocity of the jet jet is 20 mm.
~ 30 m / sec.

The impact plate 7 has one end rotatably attached to the shaft 8 and can be inclined downward by a predetermined angle with respect to the jet stream jetted from the jet nozzle 5. The tilt angle of the impact plate 7 is adjusted by moving the protruding rod member 10 connected to the back surface of the impact plate 7 back and forth. In this example, the protruding rod member 10 connected to the universal joint 9 is formed with a threaded portion 11 so that the inclination angle of the impact plate 7 can be appropriately adjusted. The plate 7 can be adjusted so as to incline at a slight inclination angle. In this example, the inclination angle of the impact plate 7 is set to an angle of 15 ° downward.

In this embodiment, the drainage port 13 of the impact algae killing apparatus 4 is arranged in the water conduit 14 so that the water can be drained. Inside the water conduit 14, a plurality of ultraviolet radiation tubes 16 are arranged in the longitudinal direction via a support frame 15 to form an ultraviolet irradiation region 17. In the ultraviolet irradiation area 17, the ultraviolet radiation tube 16 includes the ultraviolet radiation tube 16 and the water conduit 1.
It is provided so as to irradiate the water flowing between the tube walls 18 of 4 and the ultraviolet radiation tube 16.

In this embodiment, the water conduit 14 is used to effectively irradiate the water stream with the ultraviolet light emitted from the ultraviolet radiation pipe 16.
Has a tube wall 18 formed as an ultraviolet reflecting mirror. The water conduit 14 is rotated underwater so that the water in the reservoir or the lake can flow in one direction below the ultraviolet irradiation area 17 and can flow out from the lower end 19 of the water conduit 14. The blade 20 is provided on the water conduit 14 via a support frame 21.

Since this example is constructed as described above,
Water containing plankton from reservoirs and lakes is pumped up by a pressure pump and pressurized to 0.7 MPa,
It is jetted from the jet nozzle 5 for jet impact toward the impact plate 7. The injection from the injection nozzle 5 is to reduce the cell pressure from a high pressure region of 0.7 MPa to normal pressure to destroy the cells due to pressure fluctuation. The collision of the jet flow with the impact plate 7 causes the plankton flocs to be generated due to the impact. It is to disintegrate and disintegrate cells. The angle of the impact plate 7 is adjusted in advance or appropriately by the angle adjusting handle 12 so that the degree of the plankton destruction and the plankton floc dispersion is optimized.

The plankton thus dispersed and destroyed by the jet impact are introduced into the water conduit 14. Water conduit 1
Since the ultraviolet ray radiating tube 16 is arranged in 4 so as to uniformly irradiate the ultraviolet ray, the water from the reservoir or the lake that has left the ultraviolet ray irradiating area 17 is sufficiently algae killed, Finally, the underwater rotor 20 discharges the water from the lower end opening 19 of the water conduit 14 into a reservoir or lake. In this example, purification of water in a reservoir or lake could be performed at a high rate of 80% or more by cell destruction of plankton.

[0030]

INDUSTRIAL APPLICABILITY The present invention pressurizes a liquid containing plankton, ejects the pressurized liquid containing plankton to form a jet of the liquid containing plankton, and forms the jet on the solid surface. The plankton in the liquid is impacted to disperse the plankton accumulated in the form of flocs in a scattered state, and the cell membrane of the plankton is destroyed, so that the liquid such as the water of the reservoir or lake containing the conventional plankton is destroyed. Compared with the purification method and device, the number of cell destruction caused by cell membrane destruction of plankton after treatment can be performed at a high rate, and purification of liquid such as water in reservoirs and lakes can be performed in a relatively short time. , It is possible to eliminate the contamination of liquid such as water in reservoirs and lakes due to plankton. Further, as compared with the conventional method, the plankton removal efficiency is not affected by the type and characteristics of plankton, and it is possible to economically and highly efficiently purify liquid such as water in a reservoir or lake.

The present invention has a simple structure including a liquid pressurizing device, a liquid jetting nozzle and a liquid impacting device, and it is possible to destroy the flocs of the plankton and disperse the individual planktons in a disjointed state. Furthermore, with a simple structure in which a liquid ultraviolet irradiation device is connected to the liquid outlet of the liquid impact device, algae killing treatment for plankton can be efficiently performed, and it is cheaper and more expensive than conventional devices. The plankton removal treatment can be achieved with an algal killing rate, which is economically superior.

[Brief description of drawings]

FIG. 1 is a partial explanatory view mainly showing a pressurizing step, an ejecting step, an impact step, and an ultraviolet ray irradiating step in an embodiment of a liquid purifying apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid purification device 2 Ship 3 Pipe line 4 Impact algae killing device 5 Injection nozzle 6 Injection port 7 Impact plate 8 Shaft 9 Universal joint 10 Extruding rod member 11 Screw part of protruding rod member 12 Angle adjustment handle 13 Drain port 14 Water guide pipe 15 Support Frame 16 Ultraviolet Radiation Tube 17 Ultraviolet Irradiation Area 18 Pipe Wall of Water Pipe 14 19 Lower End of Water Pipe 14 Underwater Rotor 21 Support Frame

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Nobuhiro Haraguchi 1-1-1, Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture West Japan Technology Development Co., Ltd. (72) Inventor Yoshihiko Iwasaki 1633, Dororo-cho, Nobeoka-shi, Miyazaki Prefecture Address: Within Kiyomoto Iron Works Co., Ltd.

Claims (5)

[Claims] 1. A liquid containing plankton is pressurized, the pressurized liquid containing plankton is jetted to form a jet of liquid containing plankton, and the formed jet is applied to a solid surface to form a liquid. A method for purifying a liquid containing plankton, which comprises destroying a part of cells of the plankton therein. 2. A liquid containing plankton partially forming flocs is pressurized, a liquid containing pressurized plankton is jetted to form a jet of liquid containing plankton, and the formed jet is formed. A method for purifying a liquid containing plankton, which comprises irradiating an impact surface with a part of cells of the plankton in the liquid and then irradiating the liquid containing plankton with ultraviolet rays. 3. The method for purifying a liquid containing plankton according to claim 1 or 2, wherein the liquid is water or river water. 4. A liquid pressurizing device having a suction port and a discharge port, a liquid jet nozzle connected to the discharge port of the liquid pressurizing device, and in front of the jet port of the liquid jet nozzle.
And a liquid impact device provided with an impact member that is provided separately from the injection nozzle. 5. A liquid pressurizing device having a suction port and a discharge port, and a liquid injection nozzle connected to the discharge port of the liquid pressurizing device are provided, and in front of the injection port of the liquid injection nozzle,
A liquid impact device provided with an impact member provided away from the injection nozzle, and a liquid ultraviolet irradiation device provided with an ultraviolet lamp adjacent to a liquid flow path connected to a liquid outlet of the liquid impact device. An apparatus for purifying a liquid containing plankton, which is characterized by comprising: