JPH11226593A - Water quality purification type floating island - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating island which follows fluctuation of water level of lakes and marshes and regulating reservoirs and absorbs and removes eutroficating substances in the resident water by extraction and aquatic plants to purify water quality. SOLUTION: A floating island 1 wherein a vertical through-hole is provided and a pump 18 and an oxygen feeding device are arranged is provided and it is moored in a resident water region and the resident water 5 is taken from the bottom part of the island 1 through the vertical through-hole 2 by driving a pump 18 and while dissolved oxygen in the resident water 5 is increased by means of the oxygen feeding device, the resident water is elevated to the top part of the island 1 and is circulated and is made to flow to the water's edge of the island. Purification of water quality can be efficiently achieved regardless of fluctuation of water level by providing the vertical through-hole 2 in the island and arranging an air lift 6 at the position in water. In addition, it is also possible to exhibit a function for absorbing and removing euroficating substances in the resident water 5 by extraction of water and growing aquatic plants 15 on the water quality clarifying type floating island 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the purification of stagnant water, and more particularly to a floating island moored in a stagnant water area to purify the water.

[0002]

2. Description of the Related Art In recent years, the review of the environment has begun, and one of the reasons has been the long-term trend of purifying the water quality of lakes, marshes, ponds, and rivers and preserving natural ecosystems. Purifying water improves the environment of lakes, ponds, and rivers themselves, and can significantly affect the reproductive status of the plants and organisms that live there. In conventional water purification that gives richness to ecosystems, algae, water extraction, and aquatic plants are planted in shallow waters such as lakes and marshes, and nitrogen and phosphorus, which are eutrophic substances, are absorbed by photosynthesis. Extracted water and aquatic plants having the above functions are advantageous for desired photosynthesis because the roots are in water and the leaves are on water, and as suitable plants,
Catfish, mikuri, sankakui, kohone, asaza, hanaikada, reed, etc.

However, there has been a problem in that these plants, particularly algae, naturally die after photosynthesis and eventually become sludge. If there is water flow, such as lakes and rivers, the sludge will die out of dead plants, so the impact is relatively minor, but it is like a pond on a golf course where regulation ponds, blue-green algae, fertilizers, etc. flow. When water is stagnant in water or in a semi-permanent area where the flow is small, such as a wand in a river, plants may rot and produce bad smells, He had been killed.

[0004] In particular, in the case where it is essential to store water, such as a regulating pond or a pond in a golf course, the above situation becomes an unavoidable problem. In addition, in the case of this kind of pond, even if Nakanoshima is built in the pond and a purification facility is installed there to purify the water quality of the pond, the water level of the pond fluctuates, and a constant amount of water is always supplied. It can not be expected to be circulated and purified efficiently. With the progress of such water pollution, the need to further enhance the water purification function of lakes, marshes and regulating ponds has become apparent.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a floating island for purifying water by following the fluctuations in the water level of a lake or marsh or a regulating pond, and absorbing and removing the eutrophic substance in the stagnant water by extraction or aquatic plants. Is provided.

[0006]

SUMMARY OF THE INVENTION A water purification type floating island according to the present invention is a floating island in which a vertical through hole is provided in the island and a pump and an oxygen supply device are installed. It is characterized in that it is operated to take up water from the bottom of the island through the vertical through hole and increase the dissolved oxygen in the water by the oxygen supply device, raise it to the top of the island and circulate to the waterside of the island, In particular, by providing a vertical through hole in the island and installing an air lift at a position in the water, water purification is efficiently achieved regardless of fluctuations in the water level. In addition, the water-purifying type floating island according to the present invention can also exhibit the function of extracting water or growing aquatic plants to absorb and remove eutrophic substances in the retained water.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A water purification type floating island according to the present invention
Functionally, it is moored in a stagnant water area to take in stagnant water from the bottom of the island through the vertical through-hole, raise the dissolved oxygen in the stagnant water, raise it to the top of the island, and circulate it to the waterside of the island. . In order to increase the dissolved oxygen in the stagnant water, there is a method of forcibly supplying air into the stagnant water. In water purification, the stagnant water, which has increased the water purification function by increasing the dissolved oxygen, is irrigated with water extraction plants and the like. The water can be discharged and circulated from the surroundings of the floating island, so that the purpose can be achieved by installing a pump and an oxygen supply device on the floating island.

Next, an embodiment capable of achieving the above functions most efficiently will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a water purification type floating island according to the present invention floated on a regulating pond. The floating island 1 has a vertical through hole 2 inside, and the lower part 3 is always immersed in the stagnant water 5 of the regulating pond 4 as shown. An air lift 6 is installed at the underwater position of the vertical through hole 2, and the air 7 generated there is released to the upper part 8 of the floating island through the vertical through hole 2. The air lift 6 is provided with fine air (bubbles).
Since the specific gravity of the water is reduced by blowing the water 7 into the water to raise the water surface, the stagnant water 5 rises to the upper part of the floating island, flows out from there to the waterside and circulates.

Regarding the production of floating islands, although it has a different purpose, it has been published that it can be produced by various methods.
With respect to the technology for floating islands, styrofoam, various types of floating or using a drum can are already known, and in the case of the present invention, these existing technologies are sufficient. FIG. 2 illustrates one example. Styrofoam 9 is used as the floating body, and its periphery is firmly solidified by a reinforcing frame 10. An artificial lightweight soil, Kanuma soil 11 or the like is mounted on the styrofoam 9 and covered with a coconut fiber mat 12 or the like, and the whole is wrapped with a holding net 13 and fixed with a binder 14.
On the palm fiber mat 12 and the like, various kinds of extracted water or water-based plants 15 adapted to the natural environment are planted so as to be able to grow from the upper part 8 of the floating island on the waterside. In the above-mentioned artificial lightweight soil, Kanuma soil 11 and palm fiber mat 12, a water channel portion formed in a groove shape and pressed by Arakida, a creek 16 are arranged vertically and horizontally, and water in a regulating pond pumped by the air pump 3 is kept. So that the plants can be sufficiently irrigated. As described above, the floating island of the present invention has one purpose of making the flow velocity of the flowing water and the head drop hydrophilic as small as possible, so that the relationship between the weight of the floating island and the floating force sufficiently satisfies the point. Things are desirable.

[0010] The use of the airlift 6 increases the dissolved oxygen in the circulating water, and therefore improves the water purification function of the entire regulating pond. As for the air lift 6, various types of devices are commercially available, and will be appropriately selected from the various devices. A typical example is shown in FIG. Air lift 6 installed at the underwater position of vertical through hole 2
Is composed of a porous pipe 17 and an air pump 18. The porous pipe 17 is made of polypropylene, nylon, ceramics and sintered metal, and air 7 from inside can be freely released into water. An air pump 18 is attached to the porous pipe 17 by the flexible pressure-resistant hose 1.
9, and air taken in from outside is supplied through a flexible pressure-resistant hose 19. The intake of air into the air pump 18 is performed through a rain shield 20 and an air filter 21 for removing dust. In addition to ordinary power, a power source for the air pump 18 is a floating island floating on water, such as a solar cell. Maintenance-free power supply.

The floating island 1 has been treated to enhance the landscape of the regulating pond and to remove the eutrophic substances in the stagnant water. Since the floating island follows the fluctuation of the water level of the regulating pond, the waterside of the floating island can always maintain a constant hydrophilic state. This means that the height of the floating island can be set arbitrarily, and the floating island 1 can be irrigated with circulating water so that the aquatic plants 15 can grow on the floating island 1 or the streams 16 can be drained. It is installed vertically and horizontally on the island. The plant 15 can reduce the eutrophication of the stagnant water, because the roots in the water and the leaves above the water perform photosynthesis and absorb nitrogen and phosphorus in the circulating water. In addition, circulating water flowing at 0.2 to 0.3 m / sec as water in the stream 10 has an increased oxygen dissolution rate as described above, and thus requires oxygen. Monoarakai,
Planting snails such as Himetanishi promotes their growth and promotes the firefly inhabitation, and it also feeds on a variety of underwater and benthic organisms. Will be promoted.

Although the above description has described the activation of the ecosystem on the island of Ukishima, from the viewpoint of the restoration of the natural ecosystem, compared to the case where Nakanoshima is provided in the regulating pond or the pond of the golf course, the island of Ukishima is considered. The lower part of the island is shaded, so it is easy for fish to rest and evacuate from enemies like a forest with fish.It is also effective for the growth of small fish. Can also provide a good environment.

As described above, the water purification type floating island according to the present invention is hydrophilic and can efficiently purify the water quality of the stagnant water, enhance the landscape of the pond, and promote the restoration of the ecosystem including insects. Therefore, this floating island is effective to place in existing lakes and ponds, especially regulating ponds and ponds of golf courses, but it can also be used in semi-static water areas such as river wands,
Enhancing the water purification function in these weak waters,
It has the function of enriching the ecosystem including the waterfowl habitat.

[0014]

According to the water purification type floating island of the present invention, a vertical through hole is provided in the island and the floating island in which the pump and the oxygen supply device are installed is moored in the stagnant water area, and the pump is operated to penetrate the island from the bottom of the island. It is characterized by taking up stagnant water through the through hole, increasing the dissolved oxygen in the stagnant water by the oxygen supply device, raising it to the top of the island and circulating it out to the waterside of the island, especially providing a vertical through hole in the island and Floating islands follow the fluctuations in the water levels of lakes and reservoirs, increase the oxygen dissolution rate of the stagnant water, improve the water purification function, and extract eutrophic substances. The effect of improving the water purification function to be absorbed and removed by aquatic plants can be exerted. In addition, since the extracted water or aquatic plants are grown on the island and the grown extracted water or aquatic plants are cut off, the removal of the eutrophic substance in the stagnant water can be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a water purification type floating island according to the present invention.

FIG. 2 is a cross-sectional view illustrating a structural example of a water purification type floating island.

FIG. 3 is an example of an air lift employed in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floating island 2 Vertical through hole 4 Regulating pond 5 Retention water 6 Air lift 7 Air (bubble) 9 Styrofoam 10 Reinforcement frame 11 Artificial lightweight soil, Kanuma soil 12 Palm fiber mat 13 Holding net 14 Binder 15 Extraction or aquatic plant 16 Ogawa 17 Porous Pipe 18 Air pump 19 Flexible pressure-resistant hose 20 Rain shield 21 Air filter

Claims (4)

[Claims] 1. A floating island in which a vertical through-hole is provided in an island and a pump and an oxygen supply device are installed. The floating island is moored in a stagnant water area, and the pump is operated to allow water to flow from the bottom of the island through the vertical through-hole. A water purification type floating island wherein water is taken in, and while the dissolved oxygen in the stagnant water is increased by the oxygen supply device, the water is raised to the upper part of the island and circulated to the waterside of the island. 2. A floating island in which a vertical through-hole is provided in an island and an air lift is installed at a position underwater, the floating island being moored in a stagnant water area, and the air lift is operated to stop the air through the vertical through-hole from the bottom of the island. A water purification type floating island characterized by rising to the top of the island while taking in water and circulating it to the waterside of the island. 3. The water purification type floating island according to claim 1, wherein water is extracted or an aquatic plant is grown on the island. 4. The water purification type floating island according to claim 1, wherein the grown water or the aquatic plants grown on the island are cut off.