JPH10263590A - Method for cleaning water utilizing green waterweed and ultrasonic wave and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently clean the lake, pond, etc. by using water bloom, phytoplankton and an ultrasonic wave. SOLUTION: Water bloom suspending on the surface layer of the lake, pond, etc. executes actively photosynthesis in the daytime to raise the dissolved oxygen concn. and a pH value of the surface layer. The surface-layer water bloom moved with a wind wave, a water current, etc., is collected by a collecting plate, etc., a straight advance water current generated by an ultrasonic vibrator 1 is actuated, passed through a wavegide and sent to a bottom mud part where the dissolved oxygen concn. and the pH are low and the sludge is reformed and decomposed. A gas cell in a cell as the floating means is compressed b ultrasonic-vibration acceleration while the water bloom is passed through the waveguide 2 and the water bloom is deposited on the bottom mud part for some time. Meantime, the water bloom is brought into direct contact with virus, bacteria and protozoa, attacked by them and gradually decomposed and decreased. The amount of incident light into the water is increased after the water bloom in the surface layer is transferred and a productive layer is expanded. The same effect is brought by phytoplankton other than the water bloom.

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 lakes, ponds, dam lakes and the like.

[0002]

2. Description of the Related Art In the prior art, when treating blue-green algae using ultrasonic waves, cell destruction by the cavitation action of ultrasonic waves has been the main method. However, water treatment using the cavitation action of ultrasonic waves works to lower the dissolved oxygen concentration in water with deaeration. Therefore, it was inevitable that the concentration of dissolved oxygen would decrease when using the water-bloom treatment technology in the environment directly by the use of cavitation, which would have an adverse effect on fish and other ecosystems.

Further, in the prior art, another power source and device were required in a method of irradiating ultrasonic waves to water lilies. Then, after the cells were destroyed by ultrasonic waves, a plurality of devices were required, such as sending to another treatment tank for biodegradation treatment by microorganisms and performing aeration.

[0004] Today, in toxic strains such as microcystis, which are becoming priority strains in polluted lakes and marshes, cell destruction due to cavitation means that endotoxins in the cells are released into the environment at once, and the ecosystem including fish and shellfish has been introduced. There is concern about the adverse effects of Even in the technology for performing the microbial oxidation treatment, there are many questions about the reliability of the method of directly leading the water to be treated containing aoko toxin to the microbial oxidation treatment tank.

[0005]

[Problems to be solved by the invention]

(1) The water pollution problem is not limited to the phenomenon of abnormal occurrence of blue-green algae, but the photosynthetic ability of the abnormal blue-green algae is taken into one of the water purification means, and buoyancy is the main cause of the superiority of blue-green algae. Of a method and apparatus that can result in a temporary loss of (2) A method and apparatus for treating a blue-green algae with ultrasonic waves that does not require a separate device or power source for irradiating ultrasonic waves to the blue-green algae, and does not require an aerator or the like for performing biodegradation after the ultrasonic treatment. Offer. (3) To provide a method of using ultrasonic waves in water purification without cavitation, which causes cell destruction to elute cell endotoxin at a stretch and causes deaeration that lowers dissolved oxygen concentration in water.

[0006]

[Means for Solving the Problems] In the lakes, ponds, dam lakes, etc., during the daytime, superficial blue-green algae-containing surface water produced by photosynthesis with a high level of dissolved oxygen and pH is superimposed on a straight water flow created by an ultrasonic oscillator. It is sent to the bottom layer through a corrugated tube to aerobize the bottom layer and neutralize pH. A water purification system characterized by improving sludge in the lower part and activating zooplankton.

[0007] The flow rate of the water stream generated by the ultrasonic wave is about 10 cm.
/ Sec, for example, when a 3 m waveguide is used, the blue-green algae is subjected to ultrasonic irradiation for about 30 seconds. During this time, the gas vesicles in the blue-green cells are compressed by the vibration acceleration of the ultrasonic waves, but since there is no cell destructive force such as cavitation, the blue-green cells stay on the bottom mud for a certain period of time without buoyancy. In the coastal area, a water purification method is used in which light reaches the blue-green algae in this state, and the blue-green algae that loses buoyancy are used as an oxygen source on the bottom mud.

The blue-green algae staying on the bottom mud come into direct contact with viruses, bacteria, protozoa, etc., thereby being infected, or preyed on. This contact reduces blue water and eliminates the need for a separate processor for disassembly. Further, a water purification method is characterized in that the blue-green algae re-emerged by the resurrection of intracellular gas bubbles become carriers for viruses, bacteria, etc., and secondary infection occurs.

As described above, in the present invention, underwater light conditions are improved by removing surface floating blue water, and the bottom layer is aerobicized using oxygen generated by floating blue water, neutralization of pH, and existence of water loss of buoyancy. It is characterized by its use as a source of oxygen on light mud, primary infection with cyanophage and cyanobacterial decomposing bacteria due to stagnation, secondary infection, attack by protozoa, etc. Water purification method.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, water containing blue-green algae, which has a high dissolved oxygen concentration and high pH, produced by photosynthesis of a surface blue-green algae, is put on a straight stream of ultrasonic waves, and a low-oxygen state and a low pH are produced by a waveguide. Into the lower bottom layer. The dissolved oxygen amount near the bottom mud increases and at the same time the pH value is neutralized.
Removal of the surface blue-green algae, which is the cause of shading, increases the amount of light entering the water. In the present invention, ultrasonic waves are used without generating cavitation, so that there is no destruction of the cells of the blue-green algae, and the blue-green algae stays on the bottom mud due to the loss of buoyancy due to the temporary compression of the intracellular gas vesicles. In relatively shallow coastal areas, light also reaches the buoyancy-lossed blue-green algae in this state, and functions for a while as an oxygen source for photosynthetic utilization in water bodies. The blue-green algae staying on the bottom mud are gradually infected with viruses, bacteria, protozoa, etc., are eaten, and are reduced. Therefore, a separate device for the microorganism oxidation treatment is not required.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a main body of the invention constituted by a combination of an ultrasonic transducer and a waveguide which plays a central role in the present invention. (1) A megahertz-band ultrasonic transducer that generates a highly directional straight water flow, and (2) a guide for guiding the straight water flow from this transducer from the surface to the bottom layer and at the same time, preventing the dispersion of ultrasonic power. It is a wave tube. The ultrasonic vibrator may be attached to the ultrasonic vibrator mounting base (3) at an angle such that a plurality of solid vibrating elements are focused near the entrance of the waveguide, or a vortex may be formed. It may be attached to. The length of the waveguide varies slightly depending on the output of the ultrasonic wave generator (17), water depth, type of blue-green algae, concentration, etc., so it is possible to use a slide type using multiple tubes or a type that can be connected and adjusted. It is. Since the generated flow velocity is about 10 cm / sec, its length is proportional to the ultrasonic irradiation time. The vibration acceleration sent from the vibrator causes the energy to act on a gas bubble of blue-green algae having the highest impedance in the blue-water containing water flowing in the waveguide, and compresses it. The hanging device (6) of the main unit may be fixed by hanging it underwater with a rope or the like, or it may be fixed directly to a pier or the like with bolts, screws, or other metal fittings. Therefore, it is important that the waveguide is maintained as close to the surface as possible without protruding above the water surface, and that the discharge port side of the waveguide is supported just above the bottom mud. An exception is the case where the water depth is extremely deep despite the use near the shore near the outlet. FIG. 2 is a schematic side view showing an embodiment using a raft. (7) is a raft body, (10) is a blue-green algae accumulating plate, and (8) is a blue-green algae sedimentation promoting plate (only shown in FIG. 2), which efficiently collects blue-green algae moving by wind waves and guides it to the main body. (1
2) is a rope for fixing raft, and (14) is an anchor for preventing raft. FIG. 3 is a schematic plan view showing an embodiment on a raft. The raft moves to the leeward centering on the anchor, catches the surface layer water flow with the water collecting board, and transports it to just above the ultrasonic transducer. During the daytime, the accumulated water containing blue-green algae is converted into electric power generated by a solar cell (15) through an inverter (16) and converted into an alternating current by an ultrasonic oscillator (1).
7) is driven to perform processing. In the present invention, since the photosynthesis of blue-green algae is used for the purification measures of the whole water area, the apparatus is used only during the day and there is no need for a battery even when using a solar cell.

The present invention is not limited to the above embodiment. The main body of the water purification device may be attached to a raft. However, in the case of a relatively large lake, the water purification device is fixed to the side of the boat or the like, and the purifying operation is performed while pursuing the algae accumulation site. It is also possible to do.
In this case, the straight water flow created by the ultrasonic waves can function as part of the propulsion of the boat. Also, in concrete revetment ponds or dam reservoirs, it can be fixed in places where blue-green algae are likely to accumulate so that they can respond to water levels above and below with piles.

[0013] Even when the cyanobacteria that form the blue-green algae are no longer the preferred species in the water area and phytoplankton other than the blue-green algae are in the mainstream, photosynthesis of the surface floating phytoplankton is performed by sunlight during the daytime. It can function similarly as a photosynthesis-based aeration and pH neutralization device.

The apparatus according to the present invention can also send a water flow from the bottom layer to the surface layer by adjusting the suspension of the main body. By doing this at night with a battery or power transmission from the land, it is possible to push the bottom water, which becomes oxygen deficient at night, to the surface of the water and exchange gas there.

According to the present invention, a screw or the like (not shown) for promoting scum sedimentation on the surface layer may be separately installed near the ultrasonic vibrator in order to efficiently feed the scum-formed scum on the surface layer into the waveguide. I can do it.

[0016]

According to the method of the present invention, the dissolved oxygen produced by the excellent photosynthetic ability of the surface blue-green algae is put on the straight water flow generated by the ultrasonic wave during the day, and is passed through the waveguide to the oxygen-deficient bottom layer. It is sent in and has an aeration effect of increasing the amount of dissolved oxygen near the bottom mud with a low dissolved oxygen concentration. In the present invention, dissolved oxygen produced by photosynthesis of phytoplankton is used as a means for aerating the bottom mud, so that it is more energy efficient than a normal method of sending air using a compressor. Aeration of the bottom mud by aeration,
The sludge is improved and has the effect of decomposing organic substances by aerobic microorganisms. In the daytime, the photosynthesis performed by blue-green algae increases the pH of the surface water to about 10, while the bottom layer is exposed to acidic bacteria under anaerobic conditions regardless of the presence of blue-green algae.
H is as low as 4 to 5. The pH of water is pH 5 or less or p
When H9 or more is harmful to most animals and plants, in this regard, the present invention optimizes the vertical imbalance between dissolved oxygen concentration and pH using the photosynthesis action of blue-green algae to decompose organic substances by aerobic bacteria. There is a suitable ecosystem restoration effect.

Further, the apparatus of the present invention increases the amount of light entering the water by transferring the surface blue-green algae to the bottom layer, which is a cause of shading, and provides a living space for fish and shellfish and large aqueous plants.
It also has the effect of expanding the production layer such as ponds.

Since the device of the present invention does not generate cavitation, there is no immediate cell destruction, and the blue-green cells stay alive on the bottom mud in a state of loss of buoyancy due to gas bubble compression. In the relatively shallow coastal area, the water loss of buoyancy in this state also remains photosynthetic if light reaches, and it functions as a source of oxygen on bottom mud and has a further water purification effect.

In the method of the present invention, the water-bloom, which has lost buoyancy as described above, is originally infected with the virus such as cyanophage and cyanobacterial degrading bacteria while remaining on the low mud, and is supplemented by protozoa and zooplankton. Exposed to food and other attacks, it gradually decreases and disrupts the monopoly abnormal breeding of blue-green algae, and the imbalance in the ecosystem becomes more appropriate.Blue-green algae that have recovered buoyancy are carriers of these viruses and bacteria. It has the effect of greatly increasing the rate of secondary infection contact with natural enemies. As described above, a separate device is not required for the biodegradation treatment of the water lily, and the device can be simplified as a whole.

The apparatus of the present invention has a water-stacking plate and a water-sedimentation plate (shown only in FIG. 2) utilizing vertical movement of a raft to prevent the blown blue water from overlapping and scumming. A fence that protects the plant belts can be efficiently collected by migrating blue-green algae and laying such a raft-based device off the coastal area where lakes, ponds, and other waterborne plants breed. It plays a role and has the effect of inhibiting the damage of blue-green algae to aqueous plants.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main body portion of the present invention which is composed of a combination of an ultrasonic transducer and a waveguide.

FIG. 2 is a schematic side view showing an embodiment using a raft of the main body of the present invention.

FIG. 3 is a schematic plan view showing the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ultrasonic vibrator 2 Waveguide 3 Ultrasonic vibrator mount 4 Connector for connecting vibrator and waveguide 5 Lead wire 6 Main unit hanging tool 7 Raft body 8 Draft sedimentation promotion plate (only shown in FIG. 2) REFERENCE SIGNS LIST 9 Water-collecting plate support arm 10 Water-collecting plate 11 Arm support buoyant body 12 Rope for fixing raft 13 Bottom mud 14 Anchor 15 Solar cell 16 Inverter 17 Ultrasonic generator 18 Surface flow containing phytoplankton W Surface water

Claims (7)

[Claims] 1. In a lake, marsh, pond, dam lake, etc., water containing a high concentration of dissolved oxygen and a high pH, which is produced by a superficial blue-green algae in a daytime, is put on a straight water flow generated by an ultrasonic vibrating element and passed through a waveguide to a bottom layer portion. A water purification method characterized by performing aeration and neutralization of the pH of the lower layer portion of the feed. 2. In a lake, marsh, pond, dam lake, etc., water containing a high concentration of dissolved oxygen and a high pH, which is produced by a superficial blue water during daytime, is put on a straight water flow generated by an ultrasonic vibrating element and passed through a waveguide to a bottom layer portion. A water purifier characterized by performing aeration and neutralization of pH in the lower part of the feed. 3. A water purification method using as a second aeration means, a method in which blue-green algae which has lost floating means by the above-mentioned processing performs daytime photosynthesis on a relatively shallow coastal bottom mud and sends oxygen into a water area. 4. The bottom mud of a blue-green algae colony due to the loss of blue-water floating means (such as gas vesicles in a cell) due to straight water flow and vibration acceleration, without using an immediate cell destruction means by cavitation among the three actions of ultrasonic waves. A water purification method using the above stagnation and the resulting infection and predation by direct contact with viruses, bacteria, protists, etc. 5. In the water-blowing treatment using ultrasonic waves, it is necessary to use a straight-flow-generating ultrasonic vibrator for irradiating ultrasonic waves for a certain time and to use a waveguide for guiding the straight water flow in a certain direction. Characterized water purification equipment. 6. In the above-mentioned apparatus, to collect blue-green algae floating on a surface layer of a lake, a marsh, a pond, etc., and efficiently send the collected blue-green algae to the waveguide.
An apparatus characterized by using a raft with a blue-green accumulation plate and a blue-water sedimentation plate utilizing wind waves, water currents, and the like. 7. A method and apparatus for purifying water according to claim 1, wherein phytoplankton other than blue-green algae is used.