JPH08130998A - Floating island for purifying water, bag for plant culture and water purification method - Google Patents

Abstract

PURPOSE: To provide a method for cleaning water in polluted ponds and lakes, floating island which can both clean the polluted water and give people piece of mind or easiness with these water plants and bags for culturing plants which can be used in the floating island. CONSTITUTION: Planters (inner measurements: 100×200×20cm; wall thickness: 5cm) made of foamed polystyrene are molded by the bead foaming process and sprayed with a urethane coating on its surface to form an enhanced skin layer of polyurethane foam by following reaction and curing. Then, 200 through holes of 30mm diameter are uniformly bored all over the bottom of the planter, which is filled with 500g of charcoal to which microorganisms are immobilized and 500 liters of light weight soil and 20 seedlings of aquatic plants are planted. Then, 30 vessels filled with 100g of solid oxygen generating agent are hung on the outer face of the planter bottom with a string for horticultural purposes at an almost equal interval to give this floating island for cleaning water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention floats on a water surface of a pond or a lake to give people peace of mind by vegetated flowers and the like, and at the same time supplies oxygen to the surrounding water to activate microorganisms,
A floating island that also serves as a water quality purifier for purifying water, and a bag for plant cultivation that is placed on the floating island or placed or embedded in a site such as a flower bed, and a solid oxygen generator is directly added to the water to obtain the water quality. On how to purify.

The floating island of the present invention is a pond such as a park or golf course,
The bag for plant cultivation of the present invention can be used by floating on a lake or the like, and can be placed or embedded anywhere in a park, an ordinary household or the floating island of the present invention. Furthermore, the water purification method of the present invention can be carried out not only in closed water systems such as ponds, swamps, and lakes, but also in places such as rivers where water flow is scarce and water easily accumulates.
Further, the water purification / floating island of the present invention can be arranged on the surface of the water purified by the method of the present invention to continuously purify the water quality.

[0003]

2. Description of the Related Art At present, in many parks, golf courses, etc., water pollution of ponds, lakes, etc. is becoming serious, and even in rivers etc., the quality of water deteriorates due to large amounts of industrial wastewater and domestic wastewater. It has become. These are not only detrimental to the appearance, but they also cause major problems such as the generation of foul odors and carp death. Various purification equipment and materials are provided as countermeasures, but mechanical equipment is expensive, and maintenance such as replacement of clogged filter media requires labor and cost.
Further, as a purifying material, a coloring agent, a coagulant, etc. are used, but the effect of each of these is transient, and good water quality cannot be maintained for a long period of time.
Furthermore, the purification equipment and materials are intended only for water purification, and the aesthetics of the surrounding environment are not considered at all.

[0004]

The floating island of the present invention solves the problems of the conventional water purification equipment, materials, etc., and the present invention requires only simple maintenance such as replacement of the oxygen generating agent. In addition, it is a biological treatment, it is a natural purification method, and the floating island that is visible to people is planted with flowers and the like, which is also preferable from the viewpoint of aesthetics and comfort. The challenge is to provide. Moreover, the bag for plant cultivation of the present invention is excellent in handling, especially when replacing or replanting cultivation soil or plants, especially when used on this floating island, and is suitable. Furthermore, the present invention provides a method for purifying water quality by introducing a solid oxygen generator into water, and a water purification method that is simple and can continuously purify water by combining it with the arrangement of floating islands. The challenge is to provide.

[0005]

A floating island for water purification and combined use according to the first aspect of the present invention is a floating island for water purification and composed of a floating island body and an oxygen generating agent storage container, wherein the floating island body is a planter made of a resin foam. , Soil contained in the planter, and a plant vegetation in the soil, the bottom of the planter is provided with a plurality of through holes and / or slits, the outer surface of the bottom of the planter, The oxygen generating agent storage container is attached, and the solid oxygen generating agent is stored in the oxygen generating agent storage container.

Further, the floating island of the second invention is a floating island which is composed of a floating island main body and an oxygen generating agent storage container and also serves as water purification.
The floating island body is composed of a planter made of a resin foam, soil contained in the planter, and plants vegetated in the soil, and the bottom of the planter has a mesh shape, and is formed on the inner surface of the bottom. Is a mesh sheet with a mesh of 20 mesh or more,
Alternatively, a cloth is attached, and the oxygen generating agent storage container is attached to the outer surface of the bottom of the planter, and the solid oxygen generating agent is stored in the oxygen generating agent storage container. Is characterized by.

Further, the floating island of the ninth invention is a floating island which is composed of a floating island main body and an oxygen generating agent storage container and also serves as water purification.
The floating island body is composed of a planter made of a resin foam, the planter containing a plant containing soil and plants growing on the soil, a microorganism containing unit containing a porous body on which aerobic microorganisms are fixed. , And a connecting portion integrally connecting the plant containing portion and the microorganism containing portion, at least the bottom portion of the plant containing portion is provided with a plurality of through holes and / or slits, and the microorganism containing portion The oxygen generating agent storage container is attached to the outer surface of the bottom,
A solid oxygen generating agent is stored in the oxygen generating agent storage container.

The bag for cultivating plants according to the 13th aspect of the invention is characterized in that a bag-shaped body made of a mesh sheet having a mesh size of 20 mesh or more or a cloth is filled with cultivation soil. Is a plant using this bag for plant cultivation, a water purification and floating island consisting of a floating island body and an oxygen generating agent storage container, wherein the floating island body is a planter made of resin foam, and A bag for plant cultivation to be housed, and a plant to be planted in the bag for plant cultivation,
The bag for plant cultivation comprises a bag-like body made of a mesh sheet having a mesh of 20 mesh or more, or a cloth, and is filled with cultivation soil, and a plurality of through holes and / or slits are provided at the bottom of the planter. The oxygen generating agent storage container is attached to the outer surface of the bottom of the planter, and the solid oxygen generating agent is stored in the oxygen generating agent storage container.

Further, the water purification method of the twentieth invention is characterized in that the solid oxygen generating agent is directly put into water.
In the water purification method of the invention 2, the solid oxygen generator is directly put into water to purify the water, and then a part of the surface of the purified water is
The water purification purifying and floating island according to any one of claims 1, 2, 9 and 14 is arranged to continue the purification of water quality.

The above-mentioned "planter" is not particularly limited in its shape, size, etc., but must be floating on the surface of the water in a state of containing soil and plants and having an oxygen generating agent storage container attached. . For that purpose, considering the weight and buoyancy of the whole, it may be a planter of an appropriate shape and size, but in addition, considering the workability at the time of maintenance such as plant replanting, replacement of oxygen generating agent, etc. However, even if the area is large, it is preferable that the area is about 1 to ² m ² , and the depth is 1
The wall thickness can be about 0 to 30 cm and the wall thickness can be about 3 to 10 cm. Further, the shape may be a polygon such as a triangle or a quadrangle, a circle, an ellipse or a gourd shape, and a shape such as a pond or lake or a shape suitable for the surrounding landscape.

The planter is formed of "resin foam" in view of ease of molding, buoyancy, cost, and the like. Most of the resins can be made into a foam by appropriately selecting the conditions, but considering the physical properties, cost, etc., it is preferable to use expanded polystyrene, expanded polyethylene, expanded polypropylene, expanded polyurethane, or the like. Among them, expanded polystyrene, which is a general-purpose product, is particularly preferable, but expanded polystyrene has the drawbacks of low impact resistance and brittleness. Therefore, as in the third, tenth, and fifteenth inventions, expanded polystyrene surfaces are Those having a reinforced coating made of polyurethane elastomer are preferable.

The expanded polystyrene is not particularly limited in terms of foaming degree, foaming method and the like, but when molding a planter shape, the bead foaming method is preferable. The above-mentioned reinforced film can be formed by spray-coating the two-component reactive solventless urethane raw material on the surface of the expanded polystyrene molded article, and curing the reaction.

The urethane raw material consists of an isocyanate component and a polyol component.
The ones usually used for polyurethane elastomers such as tolylene diisocyanate, diphenylmethane diisocyanate and hexamethylene diisocyanate can be used without particular limitation. Well-known polyols can be used as the polyol component, and examples thereof include polyether polyols, polyester polyols, and amine-modified polyols modified by introducing an amino group at the terminal of the polyether polyols. When this amine-modified polyol is used, the urethane raw material has a high curing rate and is suitable for spray application.

Further, in the spraying method, it is preferable to use, as the polyisocyanate, an isocyanate-terminated prepolymer obtained by reacting an excess of isocyanates with polyols. As the prepolymer, either a polyether type or a polyester type can be used, and in the present invention, the urethane prepolymer produced by a conventionally known method having an isocyanate group content of about 4 to 11% can be used as it is. The prepolymer is preferably a polyether type having a low viscosity, but even if the prepolymer has a high viscosity, it can be used similarly if it is heated to lower the viscosity.

The above-mentioned "soil" is not particularly limited, and may be natural soil or commercially available soil for cultivation for gardening. For the purpose of reducing the weight of the floating island body, lightweight soil having a dry density of about 0.13 g / cm ³ may be used. Furthermore, these may be mixed and used, and may be appropriately selected depending on the buoyancy of the planter, the type of plant to be planted and the like. Also, the "plants" to be vegetated are not particularly limited, and may be selected according to the surrounding landscape, atmosphere, etc. In addition to aquatic plants such as irises and buds, flowers such as ordinary flowers or reeds are not attached. It may be an aquatic plant.

Further, although the surface of the soil in the planter may be exposed as it is, as in the fifth and eleventh inventions,
The surface thereof is preferably covered with a mesh body having a mesh of 20 mesh or more, or cloth. This mesh or cloth should be made of a material that is sufficiently permeable to water and air, does not easily break in the natural environment where the floating islands are placed, and is harmful to the growth of plants. The manufacturing method, material, etc. are not particularly limited, and cold reed and the like can be used as the mesh body, and woven fabric, non-woven fabric, knit and the like can be used as the cloth.

As the cloth, a non-woven cloth is preferable, and commercially available cloth made of polyester, nylon, polypropylene fibers or the like having a thickness of 0.5 to 2 mm, for example, about 1 mm can be used without particular limitation. The net or the like may be fixed by burying the end portion in the soil, or may be fixed more reliably by a method of adhering a required portion of the end portion to the planter with an adhesive. In addition, in this reticulate body, etc., an opening is provided at a position where plants grow,
The opening may be a hole having an appropriate diameter depending on the type and size of the plant, or may be a cross-shaped or −-shaped cut.

Next, the floating islands of the first, second and ninth inventions will be described in detail with reference to the drawings. In the first invention (see FIGS. 1 and 2), the bottom 31 of the planter 3 is provided with a large number of “through holes and / or slits” (hereinafter referred to as through holes) 32. Water is supplied to the soil 5 in the planter through the through holes and the roots 61 of the plant 6 extend into the water from here. Therefore, it is usually preferable that a large number of through holes and the like are provided substantially evenly over the entire bottom surface of the planter.

The number, size, cross-sectional shape of the through holes and the ratio of the total area of the through holes to the total area of the bottom are such that soil does not easily leak out of the planter and the floating island 1 is exposed to the water surface. It is not particularly limited as long as it is floating and the plant grows smoothly, and may be appropriately determined in consideration of the size, weight, buoyancy of the floating island or the nature of the plant to be vegetated, for example, a pore diameter of 10 to 50 mm. Through holes 50 to 4
About 100 pieces can be provided.

In the second aspect of the invention (see FIGS. 3 and 4), the bottom 31 of the planter 3 is meshed with a number of "mesh" 33. The mesh shape may be a mesh shape formed by connecting a large number of polygonal shapes, circular shapes, elliptical shapes, etc. in addition to the lattice shape, the grid shape, and the like. Further, in the case of the second invention, unlike the through holes of the first invention, the space portion forming the mesh is relatively large, and the ratio of the total area to the total bottom area is also high. Therefore, if it is left as it is, the soil easily leaks into the water, so that the “net-like sheet or cloth having a mesh size of 20 mesh or more” 7 is attached to the entire bottom surface of the planter. As the net-like sheet, cold-rolled cloth or a net made of plastic, metal or the like can be used. However, the net is not so fine as to impair the elongation of plant roots and the like, and up to about 300 mesh can be used. As the cloth, commercially available ones such as woven fabric and non-woven fabric can be used as they are.

Further, in the ninth invention (see FIG. 5), the planter constituting the floating island body 11 is composed of two main parts and a connecting part connecting them, and at least the upper end part thereof is on the water surface. A plant housing part 3 for housing soil, soil and plants
4, a microbial accommodation portion 35 for accommodating a porous body having aerobic microorganisms fixed in water, and a connection portion 36 for integrally connecting both accommodation portions. In addition, as in the case of the first aspect of the invention, a large number of through holes and the like are provided in the bottom of the plant housing section to supply water to the plant.

The number, size, etc. of the above-mentioned through-holes, etc.
Also in the case of the invention, it can be appropriately determined according to the same idea as in the case of the first invention. Further, if necessary, the through hole or the like may be provided in the bottom portion of the microorganism containing portion as well. By doing so, water can flow from the lower side of the porous body, and the purification action of microorganisms can be more effective. Can be used for. still,
In the floating island of the ninth invention, the planter may be one in which the plant containing portion, the microorganism containing portion and the connecting portion are integrally molded, or the three parts are separately molded and integrated by an appropriate means such as an adhesive. It may be bonded to.

The above-mentioned "oxygen generating agent storage container" 12 is shown in FIG.
The solid oxygen generator 2 is stored in the bottom of the planter (in the ninth invention, the bottom of the microorganism containing portion). The material, shape, size, etc. of the storage container are not particularly limited, and may be a container made of plastic, metal, or the like, having an opening / closing structure for replacing the solid oxygen generating agent and having air permeability. . In order to provide air permeability, a through hole 123 may be provided in the container wall, or a non-woven fabric or a porous sheet 124 made of cold syrup may be provided inside as a rough structure to be stored. It is sufficient that the solid oxygen generator does not easily leak out of the container.

Further, the number of the attached containers may be arbitrary, but for example, a plurality of the attached containers may be attached substantially evenly on the entire bottom surface of the floating island, and the number may be determined according to the size of the container and the required amount of the total solid oxygen generating agent. In any case, since buoyancy also works in water, the container does not weigh too much, including the contents, and considering the ease of handling when replacing the contents, it is not possible to attach it directly to the outer surface of the planter bottom. Whether hanging or hanging, it doesn't have to be so rigid. Specifically, for example, when hanging,
Appropriate items such as gardening cord 8 and wire can be used, and the container may be in a state of floating in water. If the cord or the like corrodes, it may be replaced as appropriate.

The main raw material of the solid oxygen generating agent can be variously selected within the range where the object of the present invention can be achieved, and examples thereof include calcium peroxide. The oxygen generating agent may have any shape and size such as powder, granules and pellets, and may be a lump having a larger particle size.

In the present invention, in addition to the above solid oxygen generating agent, as in the fourth, sixth, ninth, sixteenth and seventeenth inventions, the purifying action of aerobic microorganisms fixed to the porous body is used together. You can also As the porous body, natural zeolite, porous body such as perlite, porous ceramics obtained by firing various oxides and the like can be used, but the larger the pore size, the more easily microorganisms are fixed, and the seventh, 8th, 1st
As in the second, eighteenth and nineteenth inventions, it is preferable to use charcoal, which has an appropriate pore size and is excellent in the physical filtration function.

The above-mentioned "aerobic microorganism" refers to a symbiotic action of a specific bacterium with a bacterium belonging to the genus name Geotricticum and other yeasts, Nocardia and other radiant bacteria, Bacillus and other bacterium, and Alpergillus (useful filamentous fungus) and the like. You can use what you used. This microorganism can be further blended with a specially treated inorganic component such as ferrous sulfate, a fermented animal organic substance, corrosive acid, etc., and in this way, it acts biologically and chemically. A synergistic effect is exhibited.

Next, as the "mesh sheet or cloth" 91 used in the "bag for plant cultivation" of the thirteenth invention (see FIG. 7), the mesh sheet or cloth attached to the bottom of the planter of the second invention is used. Alternatively, in the fifth invention and the like, the same mesh or cloth as that used for covering the surface of the soil can be used. However, in the case of this bag for plant cultivation, since it is subjected to more severe handling such as transportation, both the mesh sheet and the cloth are stronger than the second and fifth inventions, and the soil and the like are less likely to permeate. It is preferable to use the one having a small value or a large basis weight.

The shape and size of the bag 9 for plant cultivation is not particularly limited, and may be appropriately determined according to the shape and size of the planter, the size of the place where it is placed or embedded, the surrounding landscape and the like. . As the shape, usually, a rectangular parallelepiped is easy to handle, but if it is used by being housed in a planter, such as a cylinder or a triangular prism, it may be any other suitable shape according to the shape, and the size can be changed by a person. Lift,
In consideration of the weight of the case of transportation, the size may be an appropriate size according to the size of the floating island on which the bag for plant cultivation is placed. Also in the case of this bag for plant cultivation, similar to the fifth invention and the like, holes or cross-shaped notches 92 or the like for vegetating plants are appropriately provided at appropriate places.

Further, in the water purification method of the twentieth invention, an appropriate amount of the above solid oxygen generating agent can be applied to a predetermined water surface in consideration of the water flow in a river according to the amount of water and the degree of water contamination. Water can be purified by evenly spraying and pouring. It should be noted that sprinkling an excess amount of the solid oxygen generating agent does not have any harmful effect, but is not economical, and the solid oxygen generating agent does not necessarily have to be added in a sufficient amount. Since it is generated, the generated oxygen can purify the water quality more reliably and more effectively than before the addition. This input amount is, like the twenty-first invention,
10 to 20 ppm with respect to water is sufficient, but depending on the water quality, if it is not yet sufficient, it is possible to add more.

In the water purification method of the twenty-second aspect of the present invention, immediately after or after an appropriate number of days has elapsed, the water surface is checked while the water quality is purified by introducing an appropriate amount of the solid oxygen generator as described above. Appropriate ones may be selected from the floating islands of the first, second, ninth, and fourteenth inventions and arranged at appropriate positions above in consideration of aesthetics. As a result, water quality is continuously purified, mainly around the floating islands. In addition, when the water quality deteriorates again at a location away from the floating island, the solid oxygen generating agent may be repeatedly added to a required location.

[0032]

The floating island of the present invention is used by floating it on the water surface like a natural floating island. However, in the case of the floating islands of the first and second inventions, how much is it submerged? Is
It is not a problem so long as soil and flowers do not easily flow out of the planter. However, as in the case of the fourth and sixth inventions, when it is intended to use the purification action of microorganisms together, as in the seventh and eighth inventions, charcoal is used as the porous body and the purification action is also utilized. In this case, it is preferable that the charcoal, which is placed on the bottom of the planter and on which the microorganisms are fixed, is submerged to the extent that the charcoal is below the surface of the water before use.

Further, as in the second invention, for example, the area ratio of the communicating portion of the bottom of the planter may be increased so that a larger amount of water is brought into contact with the charcoal and the microorganisms. In the case of the floating island of the first invention with a small size, the water on the bottom surface of the planter bottom is made to flow by a pump, or the water pumped up by the pump is sprinkled from above the floating island to more effectively use the purification action of charcoal and microorganisms. You can also do it. On the other hand, in the ninth invention,
Since charcoal and microorganisms are in water and are always in contact with water, the above operations are not particularly necessary, but if the surrounding water is made to flow, it is possible to maximize the effect. It is possible.

Although the floating island of the present invention is rarely used in the winter in a park pond or the like, for example, in the sense of water for fire prevention, such as in a school pool, it is necessary to sprinkle 60% of water in the summer in the winter. In a pool like this, it can be used in winter for the purpose of preventing accidents such as falling of children and death from water. For example, if floating islands are lined up along the periphery of the pool, even if a baby or the like accidentally falls, it falls on the floating island instead of underwater, so at least a major accident of drowning can be prevented.

Further, as in the fifth and eleventh inventions, when the surface of the soil is covered with a cloth such as cold sand or a cloth such as a non-woven fabric, the outflow of the soil in the planter due to wind, waves, etc. can be prevented. At the same time, it is possible to prevent pollution of the water in the pond due to the soil flowing out into the pond. In addition, the reticulate body also has a function of preventing the generation of weeds. Further, when lightweight soil having a dry density of about 0.13 g / cm ³ is used as the soil, there is a high possibility that the soil will be blown off by the wind, and the effect of using this mesh body is remarkable. Even if it rains or the water in the pond is blown up onto the upper surface of the net, the water easily permeates the net and flows into the planter, where water accumulates on the surface. Nor.

The bag for cultivating plants according to the thirteenth aspect of the invention can be used by placing it in the planter of the floating island of the present invention, and can also be made of plastic, wood, etc. in parks, ordinary households, roadside belts, etc. It can be used by placing it in a planter, or by placing it directly on the surface of the earth, or by digging an appropriate hole and embedding it in it. If you use this bag for plant cultivation, grow the plant in a greenhouse or the like if necessary, and after growing it to an appropriate size, transport it to a required place, for example, place it in a planter on a floating island, or It can be replaced with the existing one, which is very convenient for growing and transporting plants. In winter, flower beds, spring,
In summer and autumn, it can be used as a floating island, which is more convenient than direct planting.

Further, there is a problem of eutrophication as a phenomenon defined and grasped as organic pollution of water quality, and especially as nutrient necessary for breeding algae which causes eutrophication of closed water areas such as lake water and pond water. Known are phosphorus and nitrogen components. And, it is generally said that the reproduction of algae is limited by the amount of the phosphorus component, but in the present invention, calcium peroxide used as a suitable solid oxygen generator also has the effect of removing the phosphorus component in this water. Have.
Therefore, the reproduction of algae is restricted and the occurrence of eutrophication phenomenon is suppressed.

[0038]

The present invention will be described in more detail with reference to the following examples. Test Examples 1 and 2 In order to confirm the oxygen supply ability of the oxygen generating agent powder (calcium peroxide powder, manufactured by Daido Hokusan Co., Ltd., product name “O-TO-POWER”) used in the following examples, it was confirmed that the oxygen content of the oxygen water was in river water in a beaker. The oxygen generator was added to distilled water and the amount of dissolved oxygen was measured over time. (1) Conditions for Test Example 1 Test water amount: 1 liter River water; Neyagawa river water (collected under Sumida Ohashi) Oxygen generating agent usage: 2 g [However, O2 power for plants was used as the oxygen generating agent. ]

(2) Conditions of Test Example 2 Test water amount: 3 liters River water: Neyagawa river water (collected under Imazu Bridge) Oxygen generating agent usage amount: Approximately 3 g (however, O2 power for fish was used as oxygen generating agent) . The results of Test Examples 1 and 2 are shown in Table 1.

[0040]

[Table 1]

According to the results shown in Table 1, in Test Example 1, in the case of distilled water, the amount of dissolved oxygen was slightly increased to 6.8 mg / liter at the start of the test and 8.6 mg / liter after 40 hours. With water, the amount of dissolved oxygen was 4.2 mg / liter, which was low at the start of the test, and was 7.5 mg / liter after 40 hours.
It has increased considerably by liter. Further, in Test Example 2 in which the pH was not adjusted, in the case of distilled water, 7.
1 mg / liter increased significantly to 20.0 mg / liter after 2-4 hours, and even in river water 6.3 mg / liter
The liter increased to 20.0 mg / liter after 4 hours, and since then the amount has decreased, but it can be seen that the dissolved oxygen amount is three times the maximum at the start of the test.

As described above, the oxygen generating agent used in this embodiment can increase the dissolved oxygen amount in river water in a short time, and the floating island and water purification method of the present invention. The effect when used in was confirmed. As is clear from the results of each test example, in Test Example 1 in which the pH was adjusted, gentle oxygen supply continued for a long time, while in Test Example 2 in which the pH was not adjusted, a large amount of oxygen was generated in a short time. The amount of dissolved oxygen is generated and supplied, and thereafter, the amount of dissolved oxygen decreases, but even after 40 hours, the amount of dissolved oxygen is about twice that at the start of the test. In the present invention, the degree of dirt such as ponds and lakes,
The pH may be appropriately adjusted in consideration of maintenance such as replacement of the oxygen generating agent.

Test Example 3 It was examined how much orthophosphoric acid, which is one of the nutrients necessary for the reproduction of algae, which is the cause of the eutrophication phenomenon, was removed by the oxygen generating powder (O2 power for plants). In the test, orthophosphoric acid was dissolved in distilled water to prepare solutions having an ionic concentration of 42 ppm, 26 ppm and 4.5 ppm, in which a predetermined amount of oxygen generating agent was added according to the ionic concentration as shown in FIGS. Was added and the change in initial concentration with time was measured.

Although the orthophosphate ion concentration in natural lakes and the like seems to have a certain range, for example, the ion concentration estimated from the amount of total organic phosphorus compounds in Senzokuike in Ota-ku, Tokyo is about 4 to 10 ppm. Is. Therefore, the test of the above-mentioned ion concentrations of 42 ppm and 26 ppm is usually a test at a high concentration which cannot be considered in a natural state. Nevertheless, according to the results shown in FIGS. 8 and 9, only 1 g of the oxygen generating agent per 10 liters of the test water gives only 3
It can be seen that the ion concentration decreases to about 1/10 of the initial value by day. Further, according to the result of FIG. 10, when the initial concentration is low, the concentration is not significantly decreased as compared with the case where the initial concentration is high, but the absolute value of the ion concentration is very small. The excellent orthophosphoric acid removing effect of the agent was confirmed.

In FIGS. 8 to 10, when ◯ is the amount of the oxygen generating agent added to 10 liters of distilled water,
Indicates that 3.0 g of the oxygen generating agent was added to 10 liters of distilled water, and □ in FIG.
The test results when 0 g of the oxygen generating agent was added are shown.

Example 100 × 2 by foaming beads having a specific gravity of 0.03 g / cm ^3.
A planter-shaped expanded polystyrene having a size of 00 × 20 cm (inner dimension) and a wall thickness of 5 cm was prepared. A discharge pressure of 100 to 110 was applied to the surface of this planter by a high-pressure type spraying device (manufactured by Isotherm AG, model “PSM-70”).
A urethane raw material was spray-applied 2 to 3 times at a volume flow ratio of the polyisocyanate component and the polyol component of 1: 1 in kg / cm ² , and was cured by reaction to form a reinforced film made of a polyurethane elastomer on the surface of the planter.

200 through-holes having a hole diameter of 30 mm were provided substantially evenly over the entire bottom surface of the planter manufactured as described above. After that, charcoal 50 with microorganisms (Matsumoto Microbiology Laboratory, trade name "SNKD" bacteria) fixed in this planter
0 g and 500 liters of lightweight soil (manufactured by Sekisui Plastics Co., Ltd., trade name "Soilen G") were placed, and 20 aquatic plant seedlings were planted in the soil. Then, on the outer surface of the bottom of the floating island body thus obtained, 100 g of the oxygen generating agent powder (average particle size: 10 to 20 μm), and an oxygen generating agent storage container having an internal volume of 50 ml were placed at approximately equal intervals. Individual,
It was hung with a string for gardening.

In the present invention, various modifications can be made within the scope of the present invention depending on the purpose and use. For example, the plant is not directly planted in the soil in the planter of the floating island. Alternatively, the plant may be appropriately grown using the bag for plant cultivation, and the bag for plant cultivation in which this plant is vegetated may be placed in the planter as it is. In addition, anchors can be attached to the bottom of the floating island so that the floating island does not float in the pond, etc. The floating island can be pulled to the shore during maintenance.

Further, a plurality of floating islands are connected in a bridge-like shape in consideration of aesthetics according to the shape of the pond and the like to improve the appearance, and an oxygen generating agent storage container is attached to the lower part of the bridge-like shape. You may do it. The polyurethane elastomer may be used as it is, but by adding a woodgrain pattern or coloring it to the color of the skin or green, for example, a floating island that fits the natural scenery and gives comfort to people You can also

[0050]

EFFECT OF THE INVENTION The water purification and floating islands of the first and second aspects of the present invention can purify water quality in a park, golf course or the like without impairing the natural scenery thereof, and are aesthetically very preferable. At the same time, it can give peace of mind to people. In addition, in the ninth invention, the effect of water purification can be further enhanced by integrally providing a microbial accommodating portion that accommodates a porous body in which aerobic microorganisms are fixed in water, separately from the so-called floating island portion. Further, the fifth and first
As in 1 invention, by covering the surface of the soil on the floating island with a cloth such as a cold sand or a cloth such as a non-woven fabric, scattering of the soil due to wind, waves, etc. is prevented, and the scattered soil contaminates the water. It never happens.

If the bag for plant cultivation of the thirteenth invention is used, it is possible to easily vegetate and replant plants in flower beds, floating islands, etc., and as in the fourteenth invention, this bag for plant cultivation is used. It can also be used as a floating island. Furthermore, in the twentieth invention, the water quality can be purified over a wide range by a very simple method of introducing the oxygen generating agent into the required water so that the concentration is the concentration of the twenty-first invention.
By arranging a floating island on the surface of the water purified in this way as in the twenty-second aspect of the invention, continuous water purification can be achieved. This oxygen generator reliably generates oxygen according to the input amount, so if it is applied to a closed water area such as a pond or a bay that is considerably oxygen deficient or a place near it, it will surely and immediately Can purify water. Moreover, when a calcium salt is used as an oxygen generating agent, there is no problem of toxicity and it is safe.

As in the third, tenth and fifteenth inventions, the impact resistance and abrasion resistance of the planter are improved by forming a reinforced coating of polyurethane elastomer on the surface of the expanded polystyrene molded article. The floating island of the present invention, which is exposed to natural wind and rain, can be used for a long period of time and, like the fourth, sixth, ninth, sixteenth and seventeenth inventions, has a porous structure in which aerobic microorganisms are fixed to the planter bottom. By placing the body, the water purification is made more effectively, and by using charcoal as the porous body as in the seventh, eighth, twelfth, eighteenth and nineteenth inventions, Microorganisms can be efficiently propagated and fixed, and in addition, the water purification effect of the charcoal's filtering function can be expected.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a case where a porous body having microorganisms immobilized on a water purification / floating island of the first invention is used.

FIG. 2 is an enlarged perspective view of a part of the bottom of the planter used for the floating island of the first invention.

FIG. 3 is a schematic view of a transverse cross section when a porous body having microorganisms fixed to the water purification and floating island of the second invention is used.

FIG. 4 is an enlarged perspective view of a part of a bottom portion of a planter used for the floating island of the second invention.

FIG. 5 is a schematic cross-sectional view of a water purification / floating island of the ninth invention.

FIG. 6 is a schematic cross-sectional view of an oxygen generating agent storage container.

FIG. 7 is a perspective view of a bag for growing plants according to a thirteenth invention.

FIG. 8 is a graph showing changes with time of the phosphate ion concentration when the initial phosphate ion concentration is 42 ppm.

FIG. 9 is a graph showing changes with time of the phosphate ion concentration when the initial phosphate ion concentration is 26 ppm.

FIG. 10 is a graph showing changes with time of the phosphate ion concentration when the initial phosphate ion concentration is 4.5 ppm.

[Explanation of symbols]

1; Floating island for water purification, 11; Floating island body, 12; Oxygen generator storage container, 121; Storage container body, 122; Storage container lid, 123; Container wall through hole, 124: Nonwoven fabric,
2; solid oxygen generator, 3; planter, 31; bottom of planter, 32; through hole and / or slit in bottom, 3
3; mesh, 34; plant housing, 35; microorganism housing, 3
6; connection part, 4; porous body on which microorganisms are fixed, 5; soil,
6; plants, 7; mesh sheet or cloth attached to the bottom of planter, 8; string for gardening, 9; bag for plant cultivation, 91;
Mesh sheet or cloth, 92; cross cuts.

Claims (22)

[Claims] 1. A floating island for water purification, which comprises a floating island body and an oxygen generating agent storage container, wherein the floating island body comprises a planter made of resin foam, soil contained in the planter, and soil. A plant to be vegetated, the bottom of the planter is provided with a plurality of through holes and / or slits, and the oxygen generating agent storage container is attached to the outer surface of the bottom of the planter. A floating island for water purification, characterized in that a solid oxygen generator is stored in the generator storage container. 2. A floating island for water purification, which comprises a floating island body and an oxygen generating agent storage container, wherein the floating island body comprises a planter made of a resin foam, soil contained in the planter, and soil. A plant having a vegetation, the bottom of the planter is a mesh, and the inner surface of the bottom has a mesh sheet having a mesh of 20 or more meshes,
Alternatively, a cloth is attached, and the oxygen generating agent storage container is attached to the outer surface of the bottom of the planter, and the solid oxygen generating agent is stored in the oxygen generating agent storage container. A floating island that is also used for water purification. 3. The planter is one in which a two-component reactive solvent-free urethane raw material is spray-coated on the surface of a foamed polystyrene molded article and is cured by reaction to form a reinforced film made of a polyurethane elastomer. Or 2
Floating island that also serves as water purification. 4. The porous body on which aerobic microorganisms are fixed is placed on the inner surface of the bottom of the planter.
Or the floating island for water purification as described in 2. 5. The surface of the soil is covered with a mesh or a cloth having a mesh size of 20 mesh or more, and the mesh or the cloth is provided with an opening at a position where the plant is vegetated. Item 2. A floating island that also serves as water purification. 6. The porous body on which aerobic microorganisms are fixed is placed on the inner surface of the bottom of the planter.
Floating island that also serves as water purification. 7. The water purification and floating island according to claim 4, wherein the porous body is charcoal. 8. The water purification / floating island as claimed in claim 6, wherein the porous body is charcoal. 9. A floating island for water purification, which comprises a floating island body and an oxygen generating agent storage container, wherein the floating island body is composed of a planter made of resin foam, and the planter is soil and a plant vegetated on the soil. A plant containing part for containing a, a microorganism containing part containing a porous body to which aerobic microorganisms are fixed, and a connecting part integrally connecting the plant containing part with the microorganism containing part, and at least the plant containing part A plurality of through holes and / or slits are provided in the bottom of the part, and the oxygen generator storage container is attached to the bottom outer surface of the microorganism storage part.
A floating island also used for water purification, wherein a solid oxygen generating agent is stored in the oxygen generating agent storage container. 10. The planter is one in which a two-component reactive solvent-free urethane raw material is spray-coated on the surface of a foamed polystyrene molded article and cured by reaction to form a reinforced coating made of a polyurethane elastomer. Floating island that also serves as water purification. 11. The surface of the soil is covered with a mesh body having a mesh of 20 mesh or more, or a cloth, and the mesh body or the cloth is provided with an opening at a position where the plant is vegetated. Item 9. A floating island that also serves as water purification. 12. The water purification and floating island according to claim 9, wherein the porous body is charcoal. 13. A bag for plant cultivation, characterized in that a bag-like body made of a mesh sheet having a mesh of 20 mesh or more or a cloth is filled with cultivation soil. 14. A floating island that also serves as a water quality purifier, comprising a floating island body and an oxygen generating agent storage container, wherein the floating island body comprises a planter made of a resin foam, and a bag for plant cultivation contained in the planter. The plant growing bag comprises a plant to be vegetated, wherein the plant growing bag is a bag-like body made of a mesh sheet having a mesh of 20 mesh or more, or a cloth, and is filled with cultivation soil. Is provided with a plurality of through holes and / or slits, and the oxygen generating agent storage container is attached to the outer surface of the bottom of the planter, and the solid oxygen generating agent is contained in the oxygen generating agent storage container. A floating island that also serves as a water purification facility. 15. The planter is one in which a two-component reactive solvent-free urethane raw material is spray-coated on the surface of a foamed polystyrene molded article and cured by reaction to form a reinforced film made of a polyurethane elastomer. Floating island that also serves as water purification. 16. The porous body on which aerobic microorganisms are fixed is placed on the inner surface of the bottom of the planter.
Floating island for water purification as described in 4. 17. The porous body having aerobic microorganisms fixed thereon is placed on the inner surface of the bottom of the planter.
Floating island for water purification as described in 5. 18. The water purification and floating island according to claim 16, wherein the porous body is charcoal. 19. The water purification / floating island as claimed in claim 17, wherein the porous body is charcoal. 20. A water purification method, which comprises directly adding a solid oxygen generator into water. 21. The water purification method according to claim 20, wherein the concentration of the solid oxygen generator with respect to water is 10 to 20 ppm. 22. After the solid oxygen generator is directly put into water to purify the water quality, a part of the water surface of the purified water is treated,
A water purification method comprising arranging the water purification / floating island according to any one of claims 2, 9 and 14 and continuing the purification of water quality.