JPH06154772A - Separating device for water-bloom and the like - Google Patents

Abstract

PURPOSE:To provide a separating device for water-bloom, etc., which is capable of continuously separating them generated by the enriching of a lake and a marsh due to the inflow of excessive nutritive substance and delaying their regeneration. CONSTITUTION:The device is composed of a pump 2 which sucks up water to be treated containing water-bloom, etc., a lake and a marsh, and is connected to an ozone generator 6 on the suction side and dissolves an ozone into the water, in a micro form, for ozone dissolution process, and a pressure contact decomposition tower 8 which receives an ozone-dissolved water to be treated and allows the ozone to come in contact with a treated product such as water- bloom under pressure so that the treated product is decomposed. In addition, the device is equipped with a water-bloom separation tank at atmospheric pressure 11 which receives the ozone-dissolved water by its lower part from the pressure contact decomposition tank 8 and a return pipe 23 which returns purified water remaining at the bottom of the water-bloom separation tank after separation of water-bloom, etc., to a lake or a marsh.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-bloom separation device for continuously separating water-blooms and the like generated in eutrophic reservoirs and lakes.

[0002]

2. Description of the Related Art In recent years, in lakes and marshes in various places, a so-called water-bloom phenomenon has become a problem in which eutrophication of water quality causes abnormal growth of single-celled algae, phytoplankton, etc., and makes the water surface muddy.

[0003] In order to remove water-bloom and the like from such contaminated lake water and the like, conventionally, lake water and the like are pumped up and a flocculant is added, and then sand and filtration filters are used to contain the water-bloom and the like. Etc. have been separated, and the pH of fresh water from which water-bloom and the like have been removed is adjusted to pH, and then returned to lakes and marshes.

[0004]

However, in the above-mentioned conventional method, the filtering sand and the filtering filter are immediately clogged, and a certain amount of separation is performed by batch processing, which has a drawback of poor processing efficiency.

Further, since the conventional method only physically removes the water-bloom etc. by filtering the contaminated lake water etc., plankton etc. still survive in the fresh water returned to the lakes etc. after the filtering treatment. However, there is a problem that these residual plankton and the like start to grow again and the blue-green algae are regenerated in a short period of time.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a separation device for water-bloom and the like that can continuously separate water-bloom and the like and delay the re-generation of water-bloom and the like. Is.

[0007]

In order to solve the above-mentioned problems, the present invention sucks up treated water containing water-bloom and the like from lakes and the like, and connects the ozone generator to the treated water so that the treated water contains fine ozone. And a pump for forming and dissolving ozone-dissolved treated water, and for receiving the ozone-dissolved treated water from the pump and applying pressure to the ozone-dissolved treated water to bring ozone into contact with a treated substance such as water-bloom and the like to decompose the treated substance. After the pressure catalytic cracking tank, the atmospheric pressure water-separating tank for receiving the ozone-dissolved treated water from the pressure catalytic cracking tank at the lower side thereof, and the water-bloom etc. at the lower portion in the water-cooling algal separation tank are separated. It is configured to include a return pipe for returning clear water to a lake or the like.

[0008]

According to the present invention, first, the treated water containing the treated matter such as water-bloom is sucked up from the lake or the like by the pump. An ozone generator is connected to the suction side of the pump, and ozone is also sucked together with the treated water by the suction force of the pump. Then, the cavitation action of the pump causes the ozone to be atomized and dissolved in the treated water. This is the ozone-dissolved treated water.

The ozone-dissolved treated water is sent to the pressure contact treatment tank by the pump. In this pressure tank, the dissolution of the ozone is further promoted according to Henry's law, and the dissolved ozone decomposes and agglomerates the processed matter such as water-bloom contained in the treated water by its oxidizing action.

The ozone-dissolved treated water in the pressurized catalytic cracking tank is then sent to a normal pressure water-blowing separation tank, and is received at the lower side of the water-water separation tank. Then, ozone and oxygen in the ozone-dissolved treated water form fine bubbles to form an upward flow, which is carried on the upward flow and pushes the water-bloom etc. to the surface of the water. In the separation tank such as blue-green algae,
Since the upward flow of fine bubbles is continuously generated, the water-bloom etc. pushed up to the water surface are always collected near the water surface and do not sink to the lower part in the water-bloom separation tank.

The fresh water after the water-bloom and the like are decomposed and separated as described above is sent to the next tank, for example, from below the partition plate in the water-bloom and the like separation tank, and then returned to a lake or the like through a return pipe.

The above-mentioned process is continuously repeated by the apparatus of the present invention, and most of the water-bloom and the like in lakes and marshes are removed. In the treatment process, since the blue water etc. in the treated water is decomposed and killed by the oxidizing action of ozone,
In the fresh water returned to lakes and marshes through the return pipe, water-blooms and the like do not reoccur in a short period of time.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the device of the present invention.

First, a pump 2 is installed in the vicinity of a lake shore such as a lake and marsh 1 contaminated with water-bloom and the like.
Contaminated lake water or the like (hereinafter referred to as “treated water”) that needs to be treated for removal of treated substances such as blue-green algae is sucked up from the inside of the lake 1 Reference numeral 3 in the drawing is a water absorption pipe, and a strainer 4 for eliminating suction of dead branches and the like existing in the lake 1 is attached to the tip thereof.

An ozone generator 6 is connected to the suction side of the pump 2, that is, in the middle of the water absorption pipe 3 via an ozone supply pipe 5 made of a Teflon tube. The ozone generator 6 has a well-known configuration in which ozone is generated by silently discharging oxygen.

Ozone generated by the ozone generator 6 flows only in the direction of the pump 2 due to the water absorption operation of the pump 2 by a check valve 7 provided in the ozone supply pipe 5, and flows backward. It is supposed not to. Then, the ozone sucked in the direction of the pump 2 along with the water absorption operation of the pump 2 is atomized by the cavitation action of the pump 2 and dissolves in the treated water sucked up by the pump 2 (in this way, the ozone dissolves). The treated water is hereinafter referred to as "ozone-dissolved treated water").

The pump 2 is connected to a pressure catalytic cracking tank 8 whose internal pressure is controlled to be higher than atmospheric pressure and is kept in a pressurized state, and the ozone-dissolved treated water is sent to the pressure catalytic cracking tank 8. To be Generally, in a pressurized state, the efficiency of dissolving the gas in the liquid is better than that under normal pressure, so that the ozone is more sufficiently dissolved in the treated water. Then, due to the oxidizing action of a large amount of ozone dissolved in the treated water, the water-bloom and the like contained in the treated water are decomposed and killed.

The pressure catalytic cracking tank 8 has a valve 9 in the middle thereof.
Is connected to a blue-green alga separation tank 11 via a transfer pipe 10 in which the ozone-dissolved treated water in the pressurized catalytic cracking tank 8 is transferred to the blue-green water separation tank 1 through the transfer pipe 10.
1 is sent.

The transfer pipe 10 is the separation tank 11 for the water-bloom etc.
Is introduced to the lower side of the above, and extends over the lower part inside the separation tank 11 for water-bloom and the like. A large number of holes are bored in the cylindrical body of the transfer pipe 10 in the separation tank 11 such as blue water. These holes are ozone-dissolved treated water discharge holes 12 for discharging the ozone-dissolved treated water sent from the pressure catalytic cracking tank 8 into the separation tank 11 for blue water and the like.

Here, the internal pressure in the blue-green aroma separation tank 11 is in a normal pressure state equal to the atmospheric pressure. Therefore,
When the ozone-dissolved treated water is discharged from the ozone-dissolved treated-water release hole 12 into the water-bloom separation tank 11, the ozone dissolved in the treated water in the pressurized catalytic decomposition tank 8 under a pressurized environment. Oxygen precipitates, forming fine bubbles and rising in the treated water. The upward flow of bubbles such as ozone is continuously generated with the continuous supply of the ozone-dissolved treated water from the pressure catalytic decomposition tank 8, and the upward flow of ozone existing in the treated water causes Treated substances such as blue-green algae that have been decomposed and killed by the oxidizing action are pushed up toward the water surface. Since the upward flow of bubbles such as ozone is continuous, the pushed water-bloom and the like are always present near the water surface, and hardly settle in the lower part inside the water-bloom and so forth separation tank 11. Therefore, only fresh water that does not contain water-bloom or the like exists in the lower part inside the water-bloom-separation tank 11.

At the upper part of the water-bloom separation tank 11, there is provided a water-bloom scraping device 13 for scraping the water-bloom etc. pushed up to the water surface and accumulated near the water surface as described above.

In the embodiment shown in the drawings, this water-bloom scraping device 13 has a water-bloom scraping plate 14 that reciprocates back and forth across the water surface of the water stored in the water-bloom separating tank 11, and this water-bloom scraping plate 14 And an operating rod 15 for reciprocally moving the scraping plate 14 such as the blue-white back and forth. Then, the operating rod 15 is manually operated every predetermined time to scrape away the water-bloom or the like, or the operating rod 15 is linked to a motor (not shown) and appropriately actuated by a timer.

[0024] The water-bloom and the like near the water surface scraped by the water-bloom and the like scraping device 13 are separated from the water-bloom and the like separation tank 1
It drops from the edge of No. 1 and is taken out from a water-bloom discharging unit 16 provided adjacent to the water-bloom separating tank 11.

It is possible to manually scoop off the water-bloom and the like from above the water-bloom-separating tank 11 without using the above-described device for scraping the water-bloom 13 and the like. In this case, the scooping work is performed. Dozens of minutes before the ozone generator 6
If the operation of is stopped so that the water-bloom and the like are pushed up to the water surface only by the upward flow of the fine bubbles of oxygen, there is no fear that ozone will adversely affect workers who perform the scooping work.

A partition plate 17 for partitioning the water-bloom separation tank 11 into right and left is provided in the water-bloom separation tank 11, and the water-water separation tank 11 is partitioned by the partition plate 17 to form a fresh water reservoir 11a. To be done. The partition plate 17 is
The lower end portion 17a does not reach the bottom surface of the water-bloom etc. separation tank 11, and as a result, the water-bloom etc. separation tank 11 and the fresh water reservoir 11a communicate with each other through a communication portion 19 formed on the lower side. ing.

As described above, since the fresh water obtained by separating the water-bloom and the like is stored in the lower side of the water-bloom-and-separating tank 11, the fresh water reservoir 11a is passed through the communicating portion 19.
Pour into. A fresh water take-out tank 20 is provided adjacent to the side of the fresh water reservoir 11a. This fresh water take-out tank 2
Fresh water overflows from the fresh water reservoir 11a, which has become full, into 0.

Both the water-bloom separation tank 11 and the fresh water take-out tank 20 are covered with a common lid 21 and are shielded from the atmosphere. This is because if a large amount of ozone leaks out of the water vapor separation tank 11 or the like for a long period of time, it will lead to environmental damage. Then, the inside of the separation tank 11 such as the water-bloom and the like is communicated with the outside air through an appropriate decomposition catalyst device 22 provided penetrating the lid 21, and after the decomposition catalyst device 22 decomposes ozone into oxygen. It is designed to be released into the atmosphere.

A return pipe 23 for returning the fresh water in the fresh water take-out tank 20 to the lake 1 is connected to the lower portion of the fresh water take-out tank 20. The activated carbon tank 2 is provided in the middle of the return pipe 23.
4 are provided. This is in consideration of the case where ozone content remains in the fresh water, and the safety is improved by returning the fresh water to the lake or the like 1 after decomposing the fresh water into oxygen through the activated carbon tank 24. .

When it is desired to return a minute amount of ozone to the lake 1 etc., the bypass valve 26 of the bypass pipe provided so as to bypass the activated carbon tank 24 may be opened slightly. By doing so, fresh water containing only a small amount of ozone is returned to lakes and marshes, and the oxidizing effect of this ozone also has a sterilizing effect on E. coli and general bacteria in lakes and marshes, allowing them to grow in lakes and marshes. It can also contribute to the prevention of fish diseases.

[0031]

EFFECTS OF THE INVENTION According to the present invention, water-blooms and the like in lakes and marshes can be continuously removed. Therefore, unlike the conventional batch processing method, the water-blooms and the like can be efficiently separated. Moreover, since the water-blooms and the like do not survive in the fresh water returned to the lakes and marshes after the treatment due to the oxidizing action of ozone, there is an advantage that the re-generation of the water-blooms and the like in the lakes and marshes can be delayed.

[Brief description of drawings]

FIG. 1 is a configuration diagram according to an embodiment of a device of the present invention.

[Explanation of symbols]

 1 Lakes, etc. 2 Pumps 6 Ozone generators 8 Pressurized catalytic cracking tanks 11 Separation tanks for water-bloom 23 Return pipes

Claims (1)

[Claims] 1. Treated water containing blue-green algae etc. is sucked up from a lake (1) and is connected to an ozone generator (6) on the suction side, and ozone is refined and dissolved in the treated water to obtain ozone-dissolved treated water. An eggplant pump (2) and a pressure catalytic decomposition that receives the ozone-dissolved treated water from the pump (2) and applies a pressure to the ozone-dissolved treated water to bring ozone into contact with a treated product such as water-bloom and decompose the treated substance. A tank (8) and a separation tank (11) for atmospheric water-bloom etc. which receives the ozone-dissolved treated water from the pressure catalytic cracking tank (8) at its lower side.
And a return pipe (23) for returning to the lake or the like fresh water after separating the water-bloom etc. in the lower part of the water-bloom etc. separation tank (11).