JPH0724494A - Algae treating device for pond and the like - Google Patents

Abstract

PURPOSE:To maintain the cleanliness of a pond, etc., by removing large-sized algae, fine algae, turbidity components, etc., which impair the clarity of the pond, etc. CONSTITUTION:The pond 1A where, fishes live and a vessel 3 where animal plankton lives are separated and further, a photoirradiation lamp 12 is installed in a water conduit 11 to a pump suction port 10 in the animal plankton vessel 3 for the purpose of feeding water to a filter device installed in a rear stage to execute the sepn. of the animal plankton. The water from which the animal plankton is separated is filtered by the filter device 14. The filtrate is circulated to the pond.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to aquatic algae containing filamentous algae, macroalgae such as adherent algae and microalgae such as water-bloom, which impair the aesthetics of natural ponds and artificial ponds in ponds, especially in parks and resorts, The present invention relates to a device for maintaining clarity of a pond or the like by predating by zooplankton such as fish and daphnia and filtering turbidity components with a filtering device.

[0002]

2. Description of the Related Art Generally, in natural lakes, macroalgae such as filamentous algae and adhering algae are predated by fish such as carp and crucian carcass, and microalgae such as blue-green algae that remain without fish are daphnids and rotifers. Since they are predated by zooplankton such as species, large numbers of water-blooms do not occur. However, in reality, zooplankton such as Daphnia also have a relationship of being predated by fish, so in a lake where these zooplankton and fish coexist, zooplankton that should prey on microalgae such as blue-green algae, It is considered to be one of the factors that cause a large amount of blue-green algae to be generated by being eaten by fish and significantly decreasing.

Therefore, as a device for treating microalgae such as water-blooms generated in small ponds with daphnia in the past, a container for floating daphnia in a container floating on the water surface of the pond was placed in the container. It was proposed to supply water from the pond with an attached pump to feed the water flea on the water flea.

However, in the above-mentioned conventional apparatus, since the fish does not enter the container, the daphnia is not supplemented by the fish, but the growth environment is bad for the daphnia in the container, so that sufficient growth is possible. However, there is a drawback that the processing ability is extremely low in predation of microalgae such as water-bloom by Daphnia magna in the container, which is poor for practical use.

The applicant of the present application has previously proposed a device as shown in FIG. That is, a pond (a) where a fish (b) that preys on algae in the water is released, a tank (c) that grows zooplankton such as Daphnia, and a packing material (f) on which aerobic microorganisms have grown. And a microorganism treatment tank (e) that has a
And the water treated in the tank (c) is sent to the microorganism treatment tank (e) through the strainer (g) and the treated water in the tank (e) is circulated to the pond (a). It is a thing.

The apparatus shown in FIG. 3 causes a large amount of algae such as filamentous algae and adherent algae generated in a pond to be eaten by a fish (b), and microalgae such as a bluegrass which cannot be eaten by the fish (b). (C) By preying on zooplankton such as Daphnia, and aerobically oxidizing organic substances such as ammoniacal nitrogen other than various algae in the water, such as ammonia excreted from fish, by the tank (e). While maintaining the clarity of the fish and preventing the deterioration of the living environment of fish and zooplankton, it has the following drawbacks.

That is, a strainer (g) installed between the tank (c) and the tank (e) in the above processing apparatus.
However, because the strainer (g) in the tank (c) will be blocked, it is necessary to frequently wash or replace the strainer (g), and in the case of a garden pond, the density of fish is usually The pond with a low fish breeding density of 0.3 kg / m ³ or less has a small amount of fish excrement and organic substances such as ammoniacal nitrogen are purified within the range of self-cleaning action. However, there are drawbacks such as that it is not necessary to install, and that the tank (e) has a small ability to remove turbidity components.

[0008]

DISCLOSURE OF THE INVENTION According to the present invention, macroalgae such as filamentous algae and adhering algae generated in a pond are preyed on by fish grown in the pond, and microalgae such as water-bloom are preyed on by zooplankton such as Daphnia. The technical idea of maintaining the clarity of the pond by circulating the water by separating the pond where the fish is raised from the tank where the zooplankton is raised is followed, but from the tank where the zooplankton such as Daphnia grows. The objective is to keep clarification of the pond by ideally separating zooplankton from the circulating water flowing out and removing turbidity components that remain without predation by zooplankton such as fish and daphnia.

[0009]

The algae treatment device for a pond according to the present invention for achieving the above object comprises a pond in which a fish for preserving algae in water is discharged, and a pond from the pond. A tank to which water containing microalgae such as blue-green algae that remains without being eaten by fish is fed, and zooplankton such as daphnia that should prey on the microalgae is grown, and a filtration device installed in the latter stage from the tank A zooplankton tank provided with a light irradiation lamp in the water conduit leading to the suction port of the pump for feeding water to the pump, a filtering device for filtering the water sucked from the pump suction port, and a filtration of the filtering device. And means for circulating water to the pond.

[0010] In addition, an animal project such as Daphnia in the treatment tank.
Rankton's growth density is 10,000 / m ³That is all
Also, the illuminance of the light irradiation lamp is 2500 lux or more,
The density of fish in Rani pond is 0.3 kg / m³Be less than
including.

[0011]

The present invention is characterized by the fact that zooplankton such as Daphnia is
Taking advantage of the property of avoiding light and moving away from light,
When pumping water in the tank where zooplankton grows, by installing a light irradiation lamp in the water conduit leading to the pump suction port, zooplankton can be separated without using filtration means, and fish and daphnids can be separated. The clarification of the pond is maintained by removing the turbidity component that remains without being eaten by zooplankton such as by a filtration device.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which a boundary wall (4) is erected in the pond (1) and one of the ponds is a pond (1A) for growing fish, and carp and crucian carp are placed in the pond (1A). , A zooplankton tank (3) for releasing fish (2) such as grass and fish and the other for raising zooplankton such as Daphnia, and a large amount of zooplankton is raised.

An overflow port (5) is provided above the boundary wall (4) so that water in the pond (1A) can flow into the zooplankton tank (3) through the overflow port (5). To configure.

Within the zooplankton tank (3), a part of the inside of the tank (3) opposite to the overflow port (5) is divided slightly below the water surface and deeper than that, and at a substantially middle portion of the water depth. A continuous partition plate (6) with different steps is attached, the shallow water depth is used as a water conduit (11), and the deep water depth is used as a pump suction part (10).

Further, a light irradiation lamp (12) for emitting visible light is provided in the water of the water conduit (11), and a cover (13) is provided above it to prevent light from being scattered upward. The pump suction part (10) has a suction port (2
One end of a feed pipe (7) having 2) is erected, and the other end is connected to a filter device (14) via a pump (8) and a strainer (9).

Further, one end of the treated water pipe (17) is connected to the lower end of the filtration device (14), and the other end is connected to the pond (1) on the side opposite to the installation position of the zooplankton tank (3).
Connect to A). A backwash water discharge pipe (16) communicates with the upper end of the filtration device (14), and a backwash water inflow pipe (15) branched from the feed pipe (7) at the lower end of the filtration device (14). Further, one end of the air inflow pipe (19) is connected to the lower end of the filtering device (14) and the blower (18) is connected to the other end.

Each pipe communicating with the filtering device (14) is provided with a valve for switching the flow path, but these valves are omitted in this figure, and (21) is a makeup water pipe. Yes, (20) is a bypass pipe of the filtering device (14).

Next, the operation of the device of the present invention will be described. When filamentous algae, macroalgae such as adhering algae and microalgae such as blue-green algae are generated in the pond (1A), the water in the pond (1A) becomes turbid and its clarity is impaired.
Since the fish are released into A), even if the macroalgae are generated, the fish are quickly eaten by the macroalgae so that the clarity of the pond (1A) is not impaired.

Fish do not prey on microalgae such as blue-green algae, and if they remain as they are, a large amount of microalgae are generated in the pond (1A), and the clarity of the pond (1A) is impaired. Therefore, the device of the present invention drives the pump (8) constantly or intermittently to feed the water in the zooplankton tank (3) to the filtering device (14), and at the same time, to perform the light irradiation lamp (12). ) Is lit, and the water conduit (11) is irradiated with light.

By such an operation, the water in the zooplankton tank (3) is filtered by the filter device (14), and the filtered water of the filter device (14) is fed from the treated water pipe (17) to the pond (1).
A) and the water in the pond (1A) flows into the zooplankton tank (3) through the overflow port (5), and the water flows into the pond (1A), the zooplankton tank (3), and the filtration device (14). ) Are circulated in that order.

Water containing microalgae overflows from the pond (1A) into the zooplankton tank (3), but the microalgae that have flowed into the tank (3) grow in the tank (3). Predated by Plankton. Further, the water in the tank (3) is sucked by the pump (8) through the water conduit (11) and the pump suction section (10),
Since the headrace (11) is irradiated with the light from the light irradiation lamp (12), the zooplankton avoids the light,
Since it does not enter the water conduit (11), zooplankton is separated from the water here, water containing no zooplankton is sucked by the pump (8), and the water flows into the filtering device (14).

A strainer (9) is installed in the feed pipe (7) leading to the filtration device (14), but this strainer (9) is relatively large such as plant leaves mixed in the pond (1). The water from which such dust has been removed is filtered by a filtration device, and fine turbidity components such as dust and sand caused by wind are filtered to treat clear filtered water. It is circulated in the pond (1A) via the water pipe (17).

The filtering device (14) used in the present invention may be any device as long as it can remove turbidity components, but a two-layer filtering device of anthracite and sand or a filtering device using long fiber bundles (special It is preferable to use a high-speed filtration device such as Kohei 5-11482).

Since the pressure loss due to the turbidity component increases in the filtration device (14) as the filtration is continued, in this case, backwashing is performed by a conventional method. For example, the pump (8) is driven to feed the water in the zooplankton tank (3) through the feed pipe (7) and the backwash water inflow pipe (15).
4) Inflow from below, and before inflow of the backwash water,
Alternatively, at the same time, the blower (18) is driven to allow air to flow in from the lower side of the filtration device (14) through the air inflow pipe (19), sufficiently stir the filler, and remove backwash drainage containing a large amount of turbidity components. Discharge from the discharge pipe (16). Since the backwash wastewater contains a large amount of turbidity components, it is discharged without returning to the pond (1). Therefore, the amount of water in the pond (1) as a whole is reduced by only the backwash drainage discharged to the outside of the system by the backwash, so that the pond (1) is replenished with the reduced amount of makeup water from the makeup water pipe (21).

By releasing fine air or the like from the bottom of the pond (1A), oxygen is kept close to the saturated dissolved amount, thereby facilitating the oxygen uptake of fish (2) and zooplankton. It is possible to create a comfortable environment. In addition, when a sufficient amount of oxygen is dissolved in the inflow water in the filtration device (14) in this manner, the filtration device (1
It is possible to grow aerobic microorganisms in the filler layer in 4), and even if organic matter is present in the water to be treated, if the amount of the organic matter is small, the filtration device will have a certain amount. Enables aerobic microbial treatment.

Next, the light irradiation lamp used in the present invention will be described. Since the light from the light irradiation lamp (12) is used to avoid zooplankton, it is not effective if the light is too weak and the intensity of the light is low. At least 2500 lux or higher, preferably 3000 lux or higher, and most preferably 4000 lux or higher. In order to maximize the effect of the light irradiation lamp (12), it is advisable to operate the device at night when the sun is down. That is, during the sunny day, the device is stopped without driving the pump (8), the pump (8) is driven at night, and the light irradiation lamp (12) is turned on to turn on the inside of the pond (1). Circulate water.

By driving at night in this way, the light of the light irradiation lamp (12) is further emphasized, and zooplankton such as Daphnia will take action to avoid below the partition plate (6) where light cannot reach. The separation of zooplankton is facilitated. Further, before driving the pump (8), only the light irradiation lamp (12) is turned on in advance to prevent zooplankton such as Daphnia from below the partition plate (6), and then the pump (8) is turned on. Drive and zooplankton tank (3)
The zooplankton can be separated more completely by feeding the water in the filter (14).

By installing a light shield plate above the zooplankton tank (3), or by breeding floating plants on the water surface of the zooplankton tank (3), etc. It is possible to further emphasize the light of the light irradiation lamp even during the daytime.

Explaining the zooplankton in the zooplankton tank (3), any zooplankton can be used as long as it preferentially feeds on microalgae such as blue-green algae. For example, daphnia, rotifer, Examples include protozoa and the like, and it is preferable to use naturally occurring Daphnia magna if they are easily available or the environment is adjusted, and the growth density thereof is preferably at least 10,000 / m ³ or more. Further, in the zooplankton tank, it is possible to grow shellfish, shrimps and the like that prey on microalgae together with the zooplankton.

Explaining the density of the fish in the pond (1A), if the density of the fish in the pond (1A) is too high, the amount of organic substances such as ammoniacal nitrogen in the entire pond (1) will increase due to the excretions from the fish. However, this is not preferable because it causes abnormal generation of algae, and since it is necessary to install a biological treatment device for removing the organic matter, the pond (1 in the present invention
Growth densities of fish A) is 0.3 kg / m ³ or less, preferably 0.2 kg / m ³ or less, most preferably 0.1 kg /
It is good to set it to m ³ or less.

According to the present invention, a light irradiation lamp is installed in the water conduit leading to the pump suction port (22) in the zooplankton tank (3) to prevent zooplankton by irradiating light in the water conduit, thereby filtering. One of the characteristics is that zooplankton is separated from water without using any means. As a concrete example of this, in the embodiment shown in FIG. 1, a different partition plate (6) is installed in the tank (3). However, as another mode, as shown in FIG. 2, the tank (3)
A partition plate (6) is erected from the bottom of the pond, and the tank (3) is divided into two in water. One is a zooplankton breeding part (23) and the other is a pump suction part (10). Insert the feed pipe (7) into the part (10),
The light irradiation lamp (12) may be arranged so as to surround the suction port (22) provided at the tip of the feeding pipe (7).

[0032]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, large algae such as filamentous algae, adhering algae, and other microalgae, algae, and other microalgae and turbidity components other than algae, which are large in size, occur in ponds and the like and have a large appearance. Algae are removed by feeding on fish grown in a pond, and microalgae are removed by feeding on zooplankton such as Daphnia magna grown in a zooplankton tank, and turbidity components are removed by a filtration device. The pond can be kept clear, and the pond's aesthetics will not be impaired.

Since the pond (1A) where the fish live and the tank (3) where the zooplankton lives are separated, the zooplankton does not decrease due to the fish predating the zooplankton.

Further, in separating the zooplankton from the water which the zooplankton has grown, the property of the zooplankton to avoid strong light is skillfully utilized,
The zooplankton is separated without using a filtering means such as a strainer by providing a light irradiation lamp in the water conduit leading to the pump suction port and irradiating strong light into the water conduit, so even if the strainer is at the pump outlet. Even if such a strainer is provided, the strainer can be prevented from being clogged, and in some cases, the installation of a strainer dedicated to zooplankton can be omitted.

Further, by reducing the density of the fish released into the pond, it is possible to remove the organic substances such as ammoniacal nitrogen excreted by the fish by the natural purification power of the pond, so that the installation of the biological treatment device is omitted. You can

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a flow of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a part of the flow of another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a flow of the apparatus previously proposed by the applicant of the present application.

[Explanation of symbols]

 1 Pond 1A Pond for growing fish 2 Fish 3 Zooplankton tank 4 Boundary wall 5 Overflow port 6 Partition plate 7 Feed pipe 8 Pump 9 Strainer 10 Pump suction port 11 Water channel 12 Light irradiation lamp 13 Cover 14 Filtration device 15 Backwash Water inflow pipe 16 Discharge pipe 17 Treated water pipe 18 Blower 19 Air inflow pipe 20 Bypass pipe 21 Make-up water pipe 22 Suction port 23 Zooplankton breeding unit

Claims (4)

[Claims] 1. A pond in which fish that should prey on algae in water are discharged, and a tank to which water containing microalgae such as water-bloom that remains without predating by fish in the pond is fed. hand,
A zooplankton such as Daphnia that should eat the microalgae was bred, and a light irradiation lamp was provided in the water conduit from the tank to the suction port of the pump for feeding water to the filtration device installed in the subsequent stage. An algae treatment device such as a pond, which comprises a zooplankton tank, a filtering device for filtering water sucked from a pump suction port, and a means for circulating the filtered water of the filtering device to the pond. 2. The algae treatment device for ponds according to claim 1, wherein the growth density of zooplankton such as Daphnia in the zooplankton tank is 10,000 or more / m ³ . 3. The algae treatment device for ponds or the like according to claim 1, wherein the illuminance of the light irradiation lamp is 2500 lux or more. 4. The algae treatment device for ponds according to claim 1, 2 or 3, wherein the density of fish in the pond is 0.3 kg / m ³ or less.