KR101752198B1 - Floating artificial island structure for algae control - Google Patents

Abstract

The artificial island structure for algae removal according to the present invention comprises: a body formed with a space for receiving a planting material member; A buoyancy member contacting the outer circumferential surface of the body and supporting the body so as to be floated on the water phase; A fixing member for fixing the body and the buoyancy member; Wherein the algae removing layer comprises 100 parts by weight of algae removing agent, 10 to 30 parts by weight of starch and 15 to 50 parts by weight of biodegradable polymer, Wherein the biodegradable polymer is at least one selected from the group consisting of polylactic acid, polyglycolic acid, polycaprolactone, polyhydroxyalkanoate, polyethylene succinate, and polybutylene succinate. Nate contains one or more.

Description

[0001] FLOATING ARTIFICIAL ISLAND STRUCTURE FOR ALGAE CONTROL [0002]

The present invention relates to an artificial island structure for algae removal. And more particularly, to provide an artificial island structure for algae removal that is excellent in stability and control of harmful algae, and is environmentally friendly and has an excellent effect of inducing fish community.

In general, an artificial island (or an artificial island) means a structure that floats on the sea or lake for the purpose of beautifying landscapes such as seas, lakes or reservoirs, purifying polluted water, or providing artifacts. Such artificial islands are composed of a planting base on which plants for plants or plants for purification are planted, a structure for supporting the planting base, and a plurality of buoyancy bodies for imparting buoyancy to the planting base and the structure to float.

On the other hand, the phenomenon that massive proliferation of pheasants (phytoplankton) in an eutrophic lake or a slow or stagnant pond flows and accumulation on the surface of the lake changes the color of the water significantly to green is called the algae phenomenon. Among the problems, the most remarkable point in recent years is the use of green algae in the toxic and agricultural reservoirs produced by the cyanobacteria, and the inhibition of the growth of oxygen by preventing the flow of oxygen into the paddy fields when used as agriculture water.

Biological control, chemical control and water treatment control are known to prevent green algae, which is considered to be the main cause of environmental pollution. The biological control is a method using microorganisms. For example, it is a method to extract a specific gene that removes the green alga from the bacteria living in the sea, and to use it for the control of the green algae by producing a new species having strong migration and transplanting ability to the general microorganism.

The chemical control is a method of controlling with a known medicament such as copper sulphate and the like, and its effect is comparatively excellent. However, since it is economically expensive, it is difficult to use it frequently in a vast area. Especially when a herbicide is used, The problem of bird growth is eliminated by eliminating the competitive effect of higher plants, and when the herbicide is decomposed, there is a problem that more algae are proliferated than before the herbicide is used.

It is known that the above-mentioned water treatment control is carried out by coagulation, sedimentation, filtration, activated carbon adsorption, chlorine disinfection and ozone oxidation.

However, the above-mentioned green algae control methods have been relatively emphasized on costs and control effects rather than considering environmental stability. Especially, chemical control which is considered to be most practical is fast-acting and has a clear treatment effect, but it is non-selective, and in some cases, it is impossible to exclude the possibility of producing toxic substances by interacting with heavy metal accumulation and organic substances. In addition, due to economic problems such as the installation operation cost of the circulation system such as the pump and the chemical cost, these control methods have been difficult to be actually applied.

Therefore, a method for controlling harmful algae such as green algae and cyanobacteria, which is more environmentally friendly and superior in stability, can minimize the damage of green algae and cyanobacteria, and is advantageous for economic use.

In this connection, Korean Patent Laid-Open Publication No. 2012-0031666 discloses a method for controlling harmful algae containing at least one of anacardic acids, natural products containing 50% or more anacadic acid, and anacadic acid chloride Compositions are disclosed.

Barley straw, on the other hand, consists largely of lignin, cellulose and semicellulose. The lignin is a major constituent of barley stem and seed head and accounts for about 15% of the straw straw constituents (Sarkanen and Ludwing 1971). The structure of lignin consists of polyphenols and is divided into hydrolysable tannins and phenylpropanoids such as lignin. Particularly, lignin is decomposed into phenylpropane units by microbial activity in a natural environment with high oxygen saturation. These aromatic compounds are converted to quinones through an oxidation process (Pillinger et al. 1994). Appel (1993) reported that algae growth inhibitors from birch straws are highly active in water bodies with high oxygen saturation and alkaline conditions.

It is an object of the present invention to provide an artificial island structure for algae removal that is excellent in landscape effect and is environmentally friendly.

Another object of the present invention is to provide an artificial island structure for algae removal which is excellent in the control effect of harmful algae and applicable to a wide range of harmful algae.

Another object of the present invention is to provide an artificial island structure for algae removal which is excellent in sustainability of harmful algae control and economical efficiency.

It is still another object of the present invention to provide an artificial island structure for algae removal, which is excellent in community induction effect of fish and heavy metal adsorption effect.

One aspect of the invention relates to an artificial island structure for algae removal. The artificial island structure for algaecure includes a body having a space for receiving a planting material member therein; A buoyancy member contacting the outer circumferential surface of the body and supporting the body so as to be floated on the water phase; A fixing member for fixing the body and the buoyancy member; Wherein the algae removing layer comprises 100 parts by weight of algae removing agent, 10 to 30 parts by weight of starch and 15 to 50 parts by weight of biodegradable polymer, Wherein the biodegradable polymer is at least one selected from the group consisting of polylactic acid, polyglycolic acid, polycaprolactone, polyhydroxyalkanoate, polyethylene succinate, and polybutylene succinate. And Nate.

In one embodiment, the algaecide agent is characterized by comprising barley straw, plum seeds, perilla seedlings, and cloves in a weight ratio of 1: 0.1-0.5: 0.3-1: 0.1-0.5.

In one embodiment, the algaecide is obtained by adding yeast to a barley straw having a water content of 30% to 50% and first aging for 5 to 15 days at a temperature of 20 ° C to 35 ° C; The primary aged barley straw, plum seeds, cottonwood and clover are mixed in a weight ratio of 1: 0.1-0.5: 0.3-1: 0.1-0.5, and the mixture is heated at a temperature of -5 to 10 DEG C for 5 to 10 days Followed by a second aging step.

In one embodiment, the algae removing layer has a thickness of 0.5 cm to 15 cm and a density of 0.5 g / cm 3 to 2.5 g / cm 3.

In one embodiment, a plurality of through holes are formed in the bottom surface of the main body space portion and the algae removing layer.

INDUSTRIAL APPLICABILITY The artificial island structure for algae removal according to the present invention is excellent in landscape effect, environmentally friendly, has excellent stability because it does not affect invertebrates or algae, has excellent effect of controlling harmful algae and can be applied to a wide range of harmful algae , The adsorption effect of heavy metals is excellent, the algaecide component is prevented from being dispersed by the waves, and the efficacy and durability of the algaecide agent is excellent, and the feedstuff such as shrimp and plankton can be obtained. , UFI, barley straw, plum seed, etc., can be economically effective because the installation and operation cost is low.

Figure 1 shows an artificial island structure according to one embodiment of the present invention.
2 is a sectional view taken along the line A-A 'of FIG.
3 (a) is a photograph of a sample taken before installation of an artificial island structure according to an embodiment of the present invention, FIG. 3 (b) is a photograph of a sample taken after 24 hours after installing the artificial island structure of the embodiment, FIG. 3 (c) is a photograph of a sample collected after 3 days with the artificial island structure of the above embodiment installed.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be exemplary, self-explanatory, allowing for equivalent explanations of the present invention.

In this specification, " size " is defined as " maximum length ".

One aspect of the invention relates to an artificial island structure for algae removal. FIG. 1 shows an artificial island structure according to one embodiment of the present invention, and FIG. 2 is a sectional view taken along the line A-A 'of FIG. 1. Referring to FIGS. 1 and 2, the artificial island structure 100 for removing algae includes a body 10 having a space for receiving a planting material member 20 therein; A buoyancy member (30) in contact with the outer circumferential surface of the body (10) and supporting the body (10) to float on the water phase; (10), a buoyancy member (30), and an algae removing layer (40) located under the body (10) and in contact with water.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

main body

Referring to FIGS. 1 and 2, the main body 10 includes a space portion in which the planting material member 20 is accommodated. The shape of the body 10 may be circular, oval or polygonal. For example, it may be a rectangle as shown in FIG.

In the embodiment, the member for plant planting material (20) can be used by filling a soil, a wood chip or sawdust into a sheet produced by weaving coconut fiber. The coconut fiber is excellent in light weight and floating property when manufactured. Since it is made of fibrous material, water freely passes through it, protects the internal plant from typhoons or storms, and prevents the soil from being lost by the flow of water. The above-mentioned soil can be used as it is in general soil used in cultivation. It is also possible to use a separate artificial soil containing various essential nutrients and inorganic substances necessary for plant growth. At this time, the artificial soil has a specific gravity and may be in the form of porous granules of a predetermined size so as not to be rinsed with water.

In embodiments, the soil 20 may be formed to a thickness of 5 cm to 80 cm. The planting effect of the plant can be excellent in the above range.

In the present invention, the plant to be planted in the soil (20) may be at least one of reeds, pods, irises, and Buddha.

In embodiments, the body 10 may comprise one or more of metal, synthetic resin, and wood. For example, a synthetic resin can be used. In a specific example, the synthetic resin may be selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyethylene terphthalate ), Polycarbonate (PC), and nylon.

The size of the main body 10 may vary depending on the installation place of the artificial island structure 100 of the present invention. For example, it may be installed in a size of 30 cm to 10 m.

Buoyancy member

Referring to FIGS. 1 and 2, the buoyancy member 30 is included for supporting the body 10 to float on the water. 1 and 2, the edge of the main body 10 may be positioned above the buoyancy member 30 while the buoyancy member 30 contacts the outer circumferential surface of the main body 10, so that the buoyancy member 30 can be suspended.

In an embodiment, the buoyancy member 30 may use a hollow tube to provide buoyancy. The cross section of the buoyancy member 30 may be circular, elliptical or polygonal.

 The material of the buoyancy member 30 of the present invention may be at least one material selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), and polyvinylidene chloride Lt; / RTI > For example, the buoyancy member 30 may be formed using high density polyethylene (HDPE) having a density of 0.90 to 0.97 g / cm3. Under the above conditions, the durability of the buoyancy member 30 is excellent, and the artificial island structure 100 of the present invention can be easily floated to water.

The shape of the buoyancy member 30 may be in the form of a circular frame, an elliptical frame or a polygonal frame. For example, it may be in the form of a rectangular frame as shown in FIG.

Fixed member

1 and 2, the fixing member 50 surrounds and fixes the main body 10 and the buoyancy member 30 to each other. When fixed, the artificial island structure 100 of the present invention is included for the purpose of fixing the artificial island structure 100 so as not to be broken or separated by waves or water currents. When the main body 10 and the buoyancy member 30 are fixed by the fixing member 50, the artificial island structure 100 of the present invention can be prevented from being damaged by the wave. In the embodiment, the fixing member 50 may be a cable or a mesh. In an embodiment, the scale of the mesh may be 0.5 mm to 3 cm.

Also, the fixing member 50 may be formed of one material selected from stainless steel, polyethylene, nylon, and polypropylene, and the stem and root of the plant for planting can easily pass through and contact with water as shown in FIG.

Algae removal layer

The algae removing layer 40 is disposed at the lower part of the main body 10 for the purpose of removing and controlling harmful algae contained in water by contacting with water, inducing population of fishes, and adsorbing heavy metals.

In one embodiment, the environmentally-friendly algaecide is installed in water or immersed soil containing harmful algae, and harmful algae and heavy metals can be adsorbed and removed by contact. In the present specification, the term " contact " is defined to include both the case where the submerged or submerged soil containing the harmful algae is in contact with at least one surface of the environmentally friendly algaecide, or the environmentally algaecide is immersed in water.

1 and 2, the algae removing layer 40 is fixed to the fixing member 50 through fixing means (not shown) such as a cable for easy replacement from the artificial island structure 100 And can be located at the bottom of the fixed body 10.

The algae removing layer 40 in the present invention includes algaecide, starch and biodegradable polymers. In an embodiment, the algae removing layer 40 comprises 100 parts by weight of algae removing agent, 10-30 parts by weight of starch and 15-50 parts by weight of biodegradable polymer. In the above range, the harmful algae are removed and controlled, the community of the fish is induced, and the adsorption effect of heavy metals is excellent, so that the algae removing agent is prevented from being easily dispersed in the wave when the artificial island structure 100 is installed, Can be improved.

In the present invention, the algaecide agent may include at least one of barley straw, plum seed, cottonwood, and papaya.

In the present invention, the barley straw means that the spike includes stem and leaf of barley which has fallen. When the barley straw is sprayed on water containing algae, the ferulic acid such as ferulic acid and p-coumaric acid released at the decomposition of the cell wall of the barley straw and the phenolic acid such as p- The aromatics formed during the complete decomposition of lignin fraction show the inhibitory effect of harmful algae.

In addition, the barley straw generates hydrogen peroxide (H ₂ O ₂ ) in the water and generates active oxygen from the generated water. This is harmless to marine organisms, water plants such as water plants and fishes and has an effect of preventing the generation of moss, The low phosphorus content can prevent eutrophication and rapid depletion of dissolved oxygen during application to the pollutants. In addition, the barley straw is excellent in the controllability of harmful algae until completely reacted in water.

The plum seeds are seeds of plum which is a fruit of Prunus mume . The plum seeds fix the phosphorus and nitrogen which are food for the green algae to block the food and reduce the acidified fresh water to the original alkaline water by the green tide phenomenon. In addition, the plum seeds contain amygdalin which is a glycoside. The amygdaline generates glucose, benzaldehyde, and hydrocyanic acid upon the reaction with water, so that the effect of controlling or eliminating harmful algae can be excellent.

Chamaecyparis obtusa is included for the purpose of controlling harmful algae by destroying the cell walls of harmful algae and collapsing the protoplasts.

The chestnut refers to at least one of the following: twigs of chestnut ( Castanea crenata ), endothelium and crust of chestnut, and chestnut extract of chestnut fruit. The uri is contained for the purpose of removing heavy metals contained in contaminants while decomposing the harmful algae or inhibiting the growth of the harmful algae.

The uri contains phenolic acids such as gallic acid and ellagic acid, and the gallic acid has excellent antioxidative activity. In addition, the urine contains a tannin component, which is excellent in adsorption and sedimentation effects on proteins, alkaloids and heavy metals. The heavy metals to which the tannin can adsorb and precipitate may include lead (Pb), copper (Cu), and cadmium (Cd).

In one embodiment, the barley straw, plum seeds, cottonwood, and papaya can be ground to an average size of 0.1 mm to 25 mm. The surface area increases in the above average size, so that it easily reacts with harmful algae, and the harmful algae control effect can be more excellent.

In one embodiment, the algae removing agent may comprise 1: 0.1-0.5: 0.3-1: 0.1-0.5 weight ratio of barley straw, plum seed, cottonwood, and clover. For example, the above-mentioned barley straw, plum seeds, perilla seedlings and perilla can be contained in a weight ratio of 1: 0.1-0.3: 0.3-0.5: 0.3-0.5. In the above range, synergistic effect between each component is excellent, and harmful algae control and removal, heavy metal adsorption removal effect and fish community effect can be excellent at the same time.

In addition, the algaecide can be aged for the purpose of improving the controlling rate of harmful algae and the controlling efficiency.

In one embodiment, the algaecide is obtained by adding yeast to a barley straw having a water content of 30% to 50% and first aging for 5 to 15 days at a temperature of 20 ° C to 35 ° C; And mixing the primary aged barley straw, plum seeds, cottonwood, and papaya, and secondary aging for 5 to 10 days at a temperature of -5 ° C to 10 ° C. The controlling rate of the harmful algae and the controlling efficiency can be excellent under the aging condition.

The yeast may be any conventional yeast. For example, Saccharomyces cerevisiae and Saccharomyces carisbergenesis can be used. When the yeast is used, the controlling rate of the harmful algae contained in the pollutant and the controlling efficiency can be excellent.

The starch acts as a binder for binding the algaecide, and as a food for shrimp or plankton, and has an excellent effect of inducing fish community around the artificial island structure 100, and is included for the purpose of inducing fish community.

In an embodiment, the starch is contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the algaecide. When the starch is contained in an amount of less than 10 parts by weight, moldability and physical strength are lowered and the algaecide agent is easily dispersed to deteriorate the algae control effect. When the starch is contained in excess of 30 parts by weight, . For example, 10 parts by weight to 20 parts by weight.

The biodegradable polymer is included for the purpose of shaping in the form of the algae removing layer 40 of the present invention. In addition, the biodegradable polymer is completely decomposed in water and is excellent in an environmentally friendly effect.

In an embodiment, the biodegradable polymer includes at least one of polylactic acid, polyglycolic acid, polycaprolactone, polyhydroxyalkanoate, polyethylene succinate, and polybutylene succinate. When the biodegradable polymer is included, the physical strength of the algae removing layer 40 is excellent, thereby preventing the algaecide component from being dispersed in the blue water without impairing the controlling effect, improving the adhesion of the algae to be applied, It can be completely decomposed in the water phase to prevent environmental pollution.

In an embodiment, the biodegradable polymer is contained in an amount of 15 to 50 parts by weight based on 100 parts by weight of the algaecide. Within the above range, stable effects can be exhibited within a range that does not inhibit the control effect, adhesion to the organism to be applied is enhanced, and damage due to waves can be small. When the biodegradable polymer is contained in an amount of less than 15 parts by weight, moldability and physical strength are lowered, the algaecide is easily dispersed to deteriorate the algicidal effect. When the biodegradable polymer is contained in an amount exceeding 50 parts by weight, And the efficiency of controlling harmful algae is lowered. For example, 20 to 40 parts by weight.

Referring to FIG. 2, in another embodiment of the present invention, a plurality of through holes 12 and 42 may be formed in the bottom surface of the body space and the algae removing layer 40. When the through holes (12, 42) are formed, the stem of the plant or a part of the lower end of the root can be submerged in contact with water, thereby providing a place for the habitat environment of plants and aquatic animals.

In the present invention, the algae removing layer 40 may have a cylindrical shape, a polygonal columnar shape, or a plate shape. For example, it may be in a plate-like form as shown in Fig.

In the present invention, the thickness of the algae removing layer 40 may be 0.5 cm to 15 cm. The artificial island structure 100 stably floats at the thickness of the above range, and the algae removal and control effect can be excellent. For example, from 3 cm to 10 cm.

In the present invention, the density of the algae removing layer 40 may be 0.5 g / cm3 to 2.5 g / cm3. When the artificial island structure 100 is formed at the above density, the artificial island structure 100 stably floats and the algae removal and control effect can be excellent. For example, 0.8 g / cm3 to 1.5 g / cm3.

The harmful algae that can be controlled by using the algae removing layer (40) may be at least one of cyanobacteria and green algae. In one embodiment, harmful algae that can be controlled by applying the composition for controlling environmentally harmful algae include Volvox , Anabaena , Synedra , Cosmarium, Such as Staurastrum, Golenkinia , Eudorina , Scenedesmus , Microcystis , Trachelomonas , Peridinium , Pediastrum , Pediastrum , Oscillatoria , Coelastrum , Chlamydomonas , Scenedesmus and Botryococcus . In addition, the present invention relates to a method for producing the same.

In an embodiment, the algae removing layer 40 comprises a mixture of 100 parts by weight of the algae removing agent, 10 to 30 parts by weight of starch and 15 to 50 parts by weight of a biodegradable polymer at a temperature of 70 ° C to 110 ° C at 30 kgf / Cm < 2 > for 30 minutes to 3 hours. As described above, the algaecide component is not denatured during molding, and proper physical strength can be secured.

In another embodiment, the algae removing layer (40) of the present invention can be applied to a variety of biological materials such as pharmaceuticals, cosmetics, pharmaceuticals, pharmaceuticals, pharmaceuticals, Such as an emulsifying agent, a dispersing agent, or a foaming agent, which is acceptable as a solid carrier, liquid carrier, liquid diluent, liquefied gas diluent, solid diluent, or other suitable auxiliary agent.

The size of the algae removing layer 40 may vary according to the location of the artificial island structure 100 of the present invention. 1 and 2, the algae removing layer 40 may be the same size as the lower surface of the main body 10.

The artificial island structure 100 of the present invention can be applied to a place where water quality management is required in a facility for the purpose of reducing the breeding of lakes, agricultural reservoirs, ponds, and other harmful birds.

In addition, the artificial island structure 100 of the present invention connects the rim of the fixing member 50 with the external structure by a connecting member (not shown) such as a rope so as not to be swept by strong wind or blue, can do.

In addition, the artificial island structure 100 of the present invention has various sizes and shapes depending on the installation purpose and installation place.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. However, the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following examples. The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example 1

As shown in Fig. 1, a rectangular main body 10 made of polypropylene and having a space accommodating a planting material member 20 filled with a wood chip on a sheet woven with coconut fiber was 30 cm thick was prepared, and a density of 0.965 g / A hollow tube buoyancy member 30 made of a high density polyethylene material is prepared and brought into contact with the outer peripheral surface of the body 10 so that the edge of the body 10 is positioned above the buoyancy member 30.

Barley straw, plum seeds, cottonwood, and chestnut husks were prepared at a weight ratio of 1: 0.3: 0.5: 0.3, and ground to an average size of 0.5 mm. Then, the mixture containing the algicide, the starch and the biodegradable polymer (polylactic acid) in the contents as shown in the following Table 1 was pressurized at 80 ° C under a pressure of 50 kgf / cm 2 for 30 minutes to 1 hour to prepare a 10 cm- To thereby prepare a plate-like algae removing layer 40 of 0.9 g / cm 3.

A mesh network made of polypropylene having a graduation size of 2 cm is prepared as the fixing member 50 and the main body 10 and the buoyancy member 30 are covered and fixed as shown in Figs. 1 and 2. Then, 10) and fixed with a cable. As shown in FIG. 2, ten through-holes (12, 42) each having a diameter of 2 cm are formed in the floor space of the main body space part and the algae removing layer (40) so that the stem and root of the plant to be planted are exposed in water, (100).

Example 2

Yeast (Saccharomyces carlsbergensis) was inoculated into barley straw having a moisture content of 40%, first aged at a temperature of 25 캜 for 7 days, and then the first aged barley straw, plum seed, The mixture containing the untreated white wood and the clary oil at a weight ratio of 1: 0.3: 0.5: 0.3 by weight was first aged at a temperature of 5 캜 for 7 days, and the second aged mixture was pulverized to an average size of 0.5 mm. , An artificial island structure (100) was prepared in the same manner as in Example 1.

Comparative Examples 1 to 4

An artificial island structure was prepared in the same manner as in Example 1 except that algae removing agent, starch and biodegradable polymer were used as the algae removing layer in the contents shown in the following Table 1.

content
(Unit: parts by weight) Example Comparative Example One 2 One 2 3 4 Algaecide 100 100 100 100 100 100 Starch 15 15 - 5 15 15 Biodegradable polymer 35 35 - 35 8 55

Experimental Example 1

Water quality samples were taken from the rivers where harmful algae were controlled. As a result of the identification of the water quality samples, it was confirmed that 15 kinds of freshwater algae were present in the samples. The artificial island structures of Examples 1 to 2 and Comparative Examples 1 to 4 were respectively installed in the bridge area of the steel and the rim of the fixing member was connected and fixed to the bridge structure, 2, and Comparative Examples 1 to 4 were sampled and 10 kinds of algae ( Volvox , Anabaena , Cynedra , and Liliaceae ) among 15 kinds of freshwater algae were sampled, (Synedra), course Marie helpful (Cosmarium), star Wu last volume (Staurastrum), bone Blend California (Golenkinia), scheduled four levels of death mousse (Scenedesmus), micro-hour seutiseu (Microcystis), Trapani cello Monastir (Trachelomonas)) (Number of cells / 100 ml) and removal rate (%) were measured and shown in Table 2 and FIG.

In addition, the fish community size around the artificial island structures of Examples 1 to 2 and Comparative Examples 1 to 4 was observed to evaluate the fish community size in four stages of very good (⊚), excellent (◯), normal (△) The results are shown in Table 2 above.

FIG. 3 (a) is a photograph of a sample taken before the installation of the artificial island structure of Example 1, FIG. 3 (b) is a photograph of a sample taken after 24 hours after the artificial island structure of Example 1 was installed And FIG. 3 (c) is a photograph of a sample collected after 3 days with the artificial island structure of Example 1 installed. Referring to FIG. 3 and Table 2, the artificial island structures of Examples 1 and 2 of the present invention were excellent in the harmful algae control effect, the durability of control and the fish community effect, and the composition of the present invention was included, In the case of Comparative Examples 1 and 3 including the composition of the algae eliminator which is out of the range, the algae removal layer is easily dispersed according to the strong wind, the wave and the water flow, and the concentration of the harmful algae increases with time after the installation of the artificial island structure. And in the case of Comparative Examples 2 and 4, it was found that the harmful algae control efficiency and the fish community aggregation effect were lower than in Examples 1 and 2.

10: Body 12: Through hole
20: planting plant member 30: buoyancy member
40: Algae removing layer 42: Through hole
50: fixing member 100: artificial island structure

Claims (5)

A body formed with a space in which a planting material member is received;
A buoyancy member contacting the outer circumferential surface of the body and supporting the body so as to be floated on the water phase;
A fixing member for fixing the body and the buoyancy member; And
And an algae removing layer disposed at a lower portion of the main body and in contact with water,
A plurality of through holes are formed in the bottom surface of the main body space part and the algae removing layer,
The algae removing layer comprises 100 parts by weight of algae removing agent, 15 parts by weight of starch and 35 parts by weight of polylactic acid,
Wherein the algaecide agent comprises barley straw, plum seeds, perilla seedlings and cloves in a weight ratio of 1: 0.3: 0.5: 0.3,
The algaecide is obtained by adding yeast to barley straw having a moisture content of 40% and first aging for 7 days at a temperature of 25 캜; And,
Mixing the primary aged barley straw, plum seeds, cottonwood, and paprika at a weight ratio of 1: 0.3: 0.5: 0.3 and secondary aging for 7 days at a temperature of 5 캜; ≪ / RTI >
Wherein the algae removing layer has a thickness of 10 cm and a density of 0.9 g / cm 3.
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