JPH07203802A - Apparatus for separating and capturing phytoplankton in lake and marsh, pond or the like - Google Patents

Abstract

PURPOSE:To efficiently separate and capture phytoplankton in lakes and marshes.ponds, etc. CONSTITUTION:This apparatus is composed of a floating and separating tank 1 for housing a water W to be treated containing phytoplankton collected from lakes and marshes.ponds 6, etc., and floating the plankton, an inactivation treatment tank 2 provided with a vibrator 15 for housing concentrated water to be treated containing floated plankton in the tank 1 and inactivating the plankton and a settling and separating tank 3 for separating and capturing the plankton by introducing and settling water to be treated containing the phytoplankton inactivated by the treating tank 2. By the apparatus, inactivation of the phytoplankton and dissolution of colony bind are efficiently carried out to facilitate separation and capture of phytoplankton.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating and recovering phytoplankton from lakes / ponds, rivers, seas and the like.

[0002]

2. Description of the Related Art Generally, when water becomes rich in lakes, ponds, rivers, seas, etc., a large amount of phytoplankton (floating algae) such as blue-green algae is generated, and the water surface becomes turbid in green. When phytoplankton such as blue-green algae increases, the carcasses sink into the pond floor and rot into sludge,
More and more favorable environment for vegetation of plankton, that is, eutrophication progresses.

Conventionally, pond water containing phytoplankton such as blue-green algae in lakes and ponds is collected by filtering the phytoplankton with a filtering means, or killing the plankton with an algicidal agent, or filtering with ultraviolet rays. A method of separating and collecting and purifying by means of irradiation, pressure floating, etc. has been proposed.

[0004]

By the way, since the water-bloom and the like have a colony state, it is necessary to frequently clean the filtration device when the filtration device is separated and collected to cause clogging of the filtration device. There is a problem that it is extremely inefficient. The present invention has been made in view of the above problems, and an object thereof is to efficiently separate phytoplankton from water such as lakes / ponds containing phytoplankton such as water-bloom and rivers. It is to provide a recoverable device.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, the invention of claim 1 provides a flotation separation tank for accommodating the treated water containing phytoplankton collected from a lake, a pond, etc. to float the plankton, and a concentrated treated water containing the flotation plankton of the flotation tank. An inactivation treatment tank equipped with a vibrator for accommodating and inactivating the plankton and a concentrated treated water containing phytoplankton inactivated in the treatment tank are accommodated and the plankton is settled and separated. It is characterized by comprising a settling separation tank for recovery.

The invention of claim 2 is characterized in that a contact oxidation tank for feeding phytoplankton by zooplankton is adopted in place of the sedimentation tank in the invention of claim 1. The vibrator can be vibrated by the oscillating means of the ultrasonic oscillator.

According to the present invention, when the water to be treated collected from lakes and ponds is stored in the flotation separation tank, phytoplankton separates from the water and floats and collects on and near the water surface. . When the concentrated water to be treated containing phytoplankton that has been floated and accumulated flows into the inactivation treatment tank, the high-speed micro-vibration of the oscillator acts and the vibratory cavitation formed on the surface of the oscillator acts. Therefore, the phytoplankton is crushed at its colony into fine particles, loses its activity, and is uniformly dispersed in water. That is, phytoplankton does not float only near the water surface.

Therefore, when the treated water in which the plankton is inactivated is introduced into the sedimentation separation tank, the phytoplankton loses its floating property, so that the phytoplankton is sedimented and recovered in water without using a coagulant. be able to. The supernatant water of the sedimentation tank can be returned to lakes and ponds or discharged downstream.

When the water to be treated in which the plankton has been deactivated is introduced into the catalytic oxidation tank, the phytoplankton comes into contact with the contact material of the entire tank without being concentrated and attached to a part of the contact material. As it flows, it is eaten by zooplankton in the catalytic oxidation tank, and is captured and oxidatively decomposed when passing through the contact material. On the other hand, the treated water with reduced phytoplankton, that is, purified water, can be returned to lakes, ponds, or the like or discharged downstream.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the invention of claim 1
Is a flotation separation tank for floating phytoplankton to concentrate the water to be treated, 2 is a cell inactivation treatment tank, 3 is a sedimentation separation tank, 4 is a separation and recovery pit for inactivated phytoplankton, and 5 Is a pump for supplying pond water containing phytoplankton such as water-bloom, that is, water W to be treated from the pond 6 or the like to the floating separation tank 1.

The floating separation tank 1 is connected to a treated water supply pipe 7 having a pump 5 interposed therein, and a suction pipe 8 is connected to the pump 5 to supply pond water containing phytoplankton such as water-bloom. It is supposed to be done. A partition plate 9 (see FIG. 4) having a substantially fan shape forming a part of the bell mouth is provided in the treated water discharge part, and floating phytoplankton in the treated water W is accumulated. The top water is the partition plate 9
It flows upward and is smoothly led out from the outlet pipe 10 to the inactivation treatment tank 2 through the valve 11.

At the bottom of the flotation tank 1, a discharge pipe 12 is provided.
Is connected via a valve 13 so that treated water is appropriately discharged and returned to lakes and ponds. Also,
The levitation separation tank 1 is open at the top, and an illumination lamp 14 is provided. The sunlight is used during the day and the illumination lamp 14 is used during the night.
The phytoplankton is levitated and accumulated on the surface of the water by the light of (power generated by wind power generation / solar power generation or commercial power use).
Concentrates the treated water (increases phytoplankton concentration).

A transducer 16 having a vibrator 15 is disposed in the processing tank 2, and the ultrasonic oscillator 1 is provided in the transducer 16.
7 (oscillating means) is connected so that the vibrator 15 intensively generates strong ultrasonic energy (high-speed microvibration) in water. Then, the vibrator 15
The water on the surface of the vibrator 15 repeats the generation and collapse of bubble cavities due to the slight vibration caused by so-called vibratory cavitation.

Due to the high-speed micro-vibration of the vibrator 15 and the occurrence of cavitation, the phytoplankton cells and tissues are crushed, the binding of colonies is eliminated, and the phytoplankton cells are inactivated. . Therefore, the phytoplankton is uniformly dispersed in the entire treatment tank 1 and is concentrated on the water surface and does not float. The water to be treated containing the phytoplankton which has been deactivated in the treatment tank 2 is introduced into the sedimentation separation tank 3 through the valve 19 via the outlet pipe 18.

The settling / separating tank 3 is provided with a partition wall 20 for preventing short-circuiting of treated water and a purified water receiving trough 21, and the purified water in the trough 21 is discharged to a pond 6 or a downstream by a drain pipe 22. A valve 23 at the bottom of the sedimentation tank 3
A discharge pipe 24 is provided for discharging the sediment (inactivated phytoplankton) to the pit 4 via the.
25 and 26 are tank lids.

In the above embodiment, the water W to be treated containing phytoplankton such as water-bloom pumped up from the pond 6 by the pump 5 is supplied to the flotation / separation tank 1 where the sunlight and the night illumination lamp 14 are used to The sex plankton floats and accumulates on the water surface, and the water to be treated concentrated by opening the valve 11 is sucked into the inactivation treatment tank 2 through the outlet pipe 10 and flows into the inactivation treatment tank 2.

The phytoplankton in the water to be treated which has flowed into the treatment tank 2 is crushed by the high-speed microvibration of the ultrasonic oscillator 17 of the vibrator 15 in the tank 2 and the resulting cavitation. With being deactivated,
The phytoplankton colonies are crushed (elimination of colony bonds) and miniaturized, so that the phytoplankton is uniformly dispersed in water.

In this way, the water to be treated in which the cells have been inactivated flows into the sedimentation separation tank 3 by opening the valve 19 by the outlet pipe 18, and here, the plant that has become free from floating The sex plankton settles and separates at the bottom of the tank 3 without mixing the flocculant. Therefore, the vegetative plankton which settled by opening the valve 23 appropriately can be discharged and collected into the pit 4.

FIGS. 3 and 4 show an embodiment of the invention of claim 2, which is different from the above-mentioned embodiment shown in FIG. 1 in that the settling separation tank 3 is replaced by a catalytic oxidation tank 27, and the pump 5 is The point is that the pond water suction port 28 of the suction pipe 8 has a bell mouth shape with a downward opening and is floated above the water surface by a float 29. In the contact oxidation tank 27, a contact material 30 is provided, an air diffuser 31 is provided at the bottom, and a light shielding lid 32 is provided at the top.
Is provided and communicated with the inactivation treatment tank 2 through the valve 19 by the outlet pipe 18, and the purified treated water is pipe 33.
Is released to the pond 6 or downstream.

The contact material 30 is made of a special high tenacity polyester spun yarn, and is a comb net in which slit-like knitting structures are arranged in a zigzag pattern, and has a high contact efficiency. Further, the catalytic oxidation tank 27 can have a plurality of tanks connected in series or in parallel to increase the contact area and enhance the processing capacity.

In the embodiment shown in FIGS. 3 and 4, the pond 6 is also used.
The treated water W containing phytoplankton such as water-bloom pumped up from the pump 5 is concentrated in the flotation separation tank 1,
The cells of phytoplankton in the water to be treated are inactivated in the inactivation treatment tank 2, and are uniformly dispersed in the tank 2 so that they are not concentrated and suspended on the water surface.

The water to be treated in which the cells have been inactivated in this way is introduced into the catalytic oxidation tank 27 by the outlet pipe 18, where aeration is performed by the air ejected from the air diffusing pipe 31, and the plants are aerated. Since the cells of sexual plankton are inactivated, they do not float only near the water surface or adhere to a part of the contact material 30.
It flows evenly throughout the catalytic oxidation tank 27, is captured and oxidatively decomposed while passing between the contact materials 30, and is drastically reduced by being eaten by zooplankton.

The treated water purified in the catalytic oxidation tank 27 is discharged to the pond 6 or the downstream by the pipe 33 to efficiently purify the pond water, and the contact material 30 is appropriately washed. Can be washed. The contact material 30
Can adopt various things other than the above-mentioned blind net, and the aeration means by the air diffusing pipe 31 may be arranged as necessary, and this can be omitted.

The present invention is not limited to the above-mentioned embodiment. For example, the partition plate 9 has a bell-mouth shape and a shape capable of effectively sucking and discharging concentrated treated water containing phytoplankton. And the suction port 2 of the suction pipe 8
In addition to the bell mouth shape with a downward opening, 8 can have a shape capable of efficiently sucking floating plankton such as an upward bell mouth shape. Furthermore, as the oscillating means, a pressure regulating valve of a fluid device should be adopted. You can

[0025]

As described above, the invention of claim 1 is a flotation separation tank for accommodating water to be treated containing phytoplankton collected from lakes and ponds, and for floating the plankton,
An inactivation treatment tank having a vibrator for accommodating concentrated treated water containing floating plankton in a flotation tank and inactivating the plankton, and a treatment containing phytoplankton inactivated in the treatment tank. Since it is composed of a settling separation tank that introduces treated water, causes it to settle, and separates and collects it, it is possible to efficiently inactivate treated water that has been concentrated and has a high phytoplankton concentration. , It is possible to separate and collect plankton very efficiently, there is no concern about clogging of the filtration device, the device is extremely simple and maintenance is easy, and the operating cost can be reduced, which is efficient. Water can be purified.

The invention of claim 2 is as described above.
The effluent separation tank containing the phytoplankton-collected water collected from lakes, ponds, etc. and floating the plankton, and the concentrated treated water containing the levitation plankton in the levitation separation tank are stored to prevent the plankton from becoming unusable. It is characterized by comprising an inactivation treatment tank equipped with a vibrator for activating, and a contact oxidation tank for accommodating the phytoplankton inactivated in the treatment tank and feeding it by zooplankton. Therefore, it is possible to efficiently inactivate the water to be treated that has a high concentration of phytoplankton, and evenly disperse the phytoplankton in the water, making it easy and reliable to capture by catalytic oxidation. No worries about clogging,
The amount of phytoplankton can be significantly reduced, and the water purification effect can be enhanced.

Further, according to the present invention, a partition plate having a fan shape or the like is provided at the concentrated treated water discharge portion of the floating separation tank, so that the sucking performance of the treated water is improved. The concentrated treated water can be smoothly derived. further,
In the present invention, since the night illumination means is provided on the flotation separation tank, phytoplankton can be floated and accumulated day and night, and the concentration time can be greatly shortened.

Further, according to the present invention, since the suction port of the treated water suction pipe has an upward or downward bell mouth shape, a hopper shape or the like, the treated water can be efficiently sucked. Further, since the present invention is equipped with aeration means in the catalytic oxidation tank, phytoplankton is captured and oxidatively decomposed when passing through the contact material, and it is possible to significantly reduce the amount of water, and aeration provides a water purification effect. Can be increased.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the invention of claim 1.

FIG. 2 is a schematic plan view of the same embodiment.

FIG. 3 is a vertical sectional side view showing an embodiment of the invention of claim 2;

FIG. 4 is a partially omitted plan view of FIG.

[Explanation of symbols]

 1 Floating Separation Tank 2 Inactivation Treatment Tank 3 Sedimentation Separation Tank 5 Supply Pump 6 Pond 8 Suction Pipe 9 Partition Plate 14 Night Illumination Means (Lighting Lamp) 15 Transducer 17 Ultrasonic Oscillator 27 Contact Oxidation Tank 28 Suction Port 31 Aeration Means (Air diffuser) W Water to be treated

Claims (7)

[Claims] 1. A flotation separation tank for accommodating treated water containing phytoplankton collected from lakes, ponds, etc., for levitating the plankton, and a concentrated treated water containing flotation plankton for the flotation separation tank. It is composed of an inactivation treatment tank equipped with a vibrator for inactivating plankton, and a sedimentation separation tank for introducing and treating treated water containing phytoplankton which has been inactivated in the treatment tank to separate and recover it. A phytoplankton separation and recovery device for lakes, ponds, etc. 2. A flotation separation tank for accommodating treated water containing phytoplankton collected from lakes, ponds, etc. to float the plankton, and a concentrated treatment water containing levitated plankton in the flotation tank for accommodating the treated water. It comprises an inactivation treatment tank equipped with a vibrator for inactivating plankton, and a contact oxidation tank for accommodating the phytoplankton inactivated in the treatment tank and feeding it by zooplankton. Characteristic phytoplankton separation and collection device for lakes and ponds. 3. The lake / marsh according to claim 1 or 2, wherein a partition plate having a fan shape or the like having an optimum shape for improving suction performance is provided in the concentrated treated water discharge portion of the floating separation tank. A phytoplankton separation and collection device for ponds. 4. The phytoplankton separation / recovery device for lakes / ponds, etc. according to claim 1, 2 or 3, wherein night illumination means is provided on the floating separation tank. 5. The suction port of the treated water suction pipe of the supply pump for supplying the treated water to the floating separation tank has an upward or downward bell mouth shape, a hopper shape, or the like. 3 or 4 phytoplankton separation and collection device for lakes and ponds. 6. The apparatus for separating and recovering phytoplankton from lakes, ponds, etc. according to claim 2, 3, 4 or 5, wherein the contact oxidation tank is provided with aeration means. 7. The vibrator is vibrated by an oscillating means such as an ultrasonic oscillator.
A phytoplankton separation and recovery device for 4, 5 or 6 lakes, ponds, etc.