Seaweed bed proliferation bank structure and method for creating seaweed bed

Abstract

To provide a seaweed bed proliferation bank structure capable of effectively supplying nutrient salt necessary for growth of seaweed, effectively promoting growth of seaweed, effectively storing blue carbon, and contributing to carbon neutral, and a method for creating seaweed bed using the proliferation bank structure.SOLUTION: A seaweed bed proliferation bank structure includes: a plate pedestal body composed of mortar or concrete, artificial calcium carbonate and particles containing seaweed nutrient salt, in which particles are dispersed at least on a pedestal body surface; a seed attaching plate body composed of seawater biodegradable resin and artificial calcium carbonate mounted on the plate pedestal body; and a seaweed adhesion plate body composed of mortar or concrete, artificial calcium carbonate and particles containing seaweed nutrient salt, which are mounted on the plate pedestal body.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a seaweed bed proliferation reef structure and a method for creating a seaweed bed, and in particular to a seaweed bed proliferation reef structure and a method for creating a seaweed bed that effectively promotes the growth of algae and can contribute to a carbon dioxide absorption source (blue carbon). [Background technology]

[0002] In recent years, due to the effects of rising sea temperatures associated with climate change, traditional seaweed beds are shrinking and the area of ​​seaweed that has been affected by predation by sea urchins and other insects is expanding. As this "shoreline denudation" spreads, the biodiversity that has been maintained will be lost, and damage to the ecosystem will have an adverse effect on the fishing industry, including a decline in fish catches. In addition, the main causes of the shrinkage of seaweed beds due to rising sea temperatures include a decrease in the concentration of nutrients in the algae and increased predation activity by fish and other organisms.

[0003] In light of this situation, seaweed bed propagation reefs have been used to create nucleus seaweed beds for the regeneration of seaweed beds in surrounding sea areas. The basic structure of a conventional seaweed bed reef is a base made of concrete or other material, on which propagation plates for seaweed seeds (zoospores and fertilized eggs) to germinate, attach and grow are placed, and the base is surrounded by netting to prevent damage by fish, etc.

[0004] As an example of a conventional seaweed bed-creating reef, JP 2015-167524 A (Patent Document 1) discloses a seaweed bed-creating reef that comprises a settlement section having a plurality of settlement blocks that promote the settlement of seaweed, and a cage section that surrounds and contains the settlement section, the settlement section being formed in a rectangular parallelepiped shape and preferably a porous concrete block, the cage section being formed in a rectangular parallelepiped shape with an inside dimension that is complementary to the settlement section, and at least one face of the cage section having a plurality of protrusions for fixing the cage section to the seabed.

[0005] Furthermore, JP 2016-19469 A (Patent Document 2) discloses a method for forming a seaweed bed, in which algae seeds are placed on one side of a plate-shaped mounting member, a filament is attached to the mounting member so that the seeds are positioned between the mounting member and the filament, and the mounting member has a plurality of protrusions protruding from one side, and the filament is attached to the mounting member by spanning between the plurality of protrusions, and the mounting member with the seeds fixed thereto is attached to a concrete block and installed in a predetermined position where the seaweed bed is to be formed. Specifically, the plate for germinating the seeds is removable, and a seed thread with seaweed seeds planted on it can be wound around the protrusions on the plate. The plate with the seed thread wound around it is suspended above the sea surface to allow the seeds to germinate, and then it is moved to a propagation reef to form a nucleus seaweed bed. The nucleus seaweed bed serves as a base for the regeneration of the seaweed bed, and seeds are supplied to the marine area surrounding the seaweed bed propagation reef. The material of the detachable plate is a mixture of lightweight plastic and inorganic powder, taking into consideration the ease of hanging and relocation.

[0006] JP 2022-110170 A (Patent Document 3) discloses a method for manufacturing a marine sinking structure to be sunk on the seabed to form a fish reef or seaweed bed reef, which comprises manufacturing a main body having the function of promoting the reproduction and growth of fish and shellfish, placing the main body on a bottom formwork, erecting a cylindrical wire mesh so as to surround the placed main body, and pouring unhardened concrete into the wire mesh to embed the lower part of the main body to form a base plate made of concrete, and hardening the poured concrete in a state in which some of the aggregate particles contained in the unhardened concrete protrude from the mesh of the wire mesh, or in a state in which the mortar components of the unhardened concrete flow out from the mesh of the wire mesh.

[0007] Furthermore, in recent years, efforts to achieve carbon neutrality by reducing greenhouse gases such as carbon dioxide have been attracting attention, and there is a need to reduce greenhouse gas emissions and strengthen absorption. Seaweed beds in particular are positioned as a carbon dioxide absorption source through photosynthesis (blue carbon), and the regeneration of seaweed beds is seen as an important issue in terms of climate change countermeasures.

[0008] In consideration of such environmental protection, JP 2023-110190 A (Patent Document 4) describes a method for mixing dredged soil with a solidification material and applying a force of 500 kN / m 2 More than 9800kN / m 2 The present invention discloses a seaweed growth base in which a base material having the following 28-day strength is placed in water and installed, and the void ratio calculated using the following formula is a maximum of 20%. Porosity% = (1 - amount of base material added m 3 / Volume m of the base material 3 ) x 100

[0009] However, rising sea temperatures due to climate change are thought to be affecting not only the proliferation of phytoplankton and a nutrient deficiency in the surface seawater, but also a decrease in the circulation of nutrients from deep layers to the surface, where nutrients are highly concentrated, due to the suppression of convection between the warmer surface seawater and the colder deep seawater.However, conventional seaweed bed reefs have not been sufficient to efficiently replenish the nutrients necessary for algae growth and promote algae growth while reducing the environmental impact. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] JP 2015-167524 A [Patent Document 2] JP 2016-19469 A [Patent Document 3] JP 2022-110170 A [Patent Document 4] JP 2023-110190 A Summary of the Invention [Problem to be solved by the invention]

[0011] The object of the present invention is to solve the above problems and to provide a seaweed bed proliferation reef structure that can effectively supply nutrients necessary for algae growth to promote algae growth, and can effectively store blue carbon to contribute to the realization of carbon neutrality, and a method of creating a seaweed bed using said proliferation reef structure. Furthermore, it is also preferable to provide a seaweed bed proliferation reef structure that takes into consideration the marine environment and uses artificial calcium carbonate synthesized from calcium-containing waste and carbon dioxide in exhaust gas, and a method for creating a seaweed bed using said proliferation reef structure. [Means for solving the problem]

[0012] The inventors have developed a seaweed bed proliferation reef structure and a method for creating a seaweed bed using said proliferation reef structure, which has a nutrient supply function and is made of seawater-biodegradable resin, and which preferably uses artificial calcium carbonate for the base, synthesized from calcium-containing waste and carbon dioxide in exhaust gases, thereby creating an environmentally friendly, rich seaweed bed that can effectively store blue carbon.

[0013] (1) The seaweed bed growth reef structure of the present invention is A plate base body comprising mortar or concrete, artificial calcium carbonate, and particles containing algae nutrients, the particles being scattered at least on the surface of the plate base body; A seed mounting plate body made of seawater biodegradable resin and artificial calcium carbonate, which is loaded on the plate base body; An algae-growth plate body comprising mortar or concrete, artificial calcium carbonate, and particles containing algae nutrients, the algae-growth plate body being loaded on the plate base body, the algae-growth plate body having an uneven surface at least on the surface not facing the plate base body, and the particles being scattered at least on the surface not facing the plate base body; The present invention relates to a seaweed bed growth reef structure.

[0014] (2) Preferably, in the seaweed bed proliferation reef structure described above in (1), the seed mounting plate body is characterized in having a plurality of protrusions for mounting seed threads containing algae seeds.

[0015] (3) More preferably, in the seaweed bed growth reef structure of the above (1) or (2), the artificial calcium carbonate is derived from the synthesis of calcium in the waste and carbon dioxide in the exhaust gas.

[0016] (4) More preferably, in the seaweed bed growth reef structure of (1) or (2) above, a base plate body is provided on the plate base body and between the seed mounting plate body, the base plate body being composed of mortar or concrete, artificial calcium carbonate, and particles containing nutrients for algae, the particles being scattered at least on the surface of the base plate body.

[0017] (5) More preferably, in the seaweed bed proliferation reef structure described above in (4), a gap is provided between the base plate body and the seed mounting plate body.

[0018] (6) The method for creating a seaweed bed of the present invention includes placing the seaweed bed growth reef structure of (1) or (2) above in seawater, and using the algae nutrients dissolved from the particles containing algae nutrients contained in the plate base and the algae attachment plate, germinating and growing seaweed from seed threads containing seaweed seeds placed on the seed attachment plate, Seeds are released from the grown algae, and the seeds attach to at least the uneven surface of the algae attachment plate body, The seaweed grows on the algae-growing plate by utilizing the algae nutrients dissolved from the particles contained in the plate base and the algae-growing plate, and the seawater-biodegradable resin of the seed mounting plate is biodegraded in seawater over time. This method for creating a seaweed bed is characterized in that seeds released from seaweed grown on an algae-growth plate are deposited on the seabed surrounding the plate base and / or the seaweed bed growth reef structure, and a seaweed bed in which algae grow is created by utilizing algae nutrients eluted from the particles contained in the plate base and the algae-growth plate.

[0019] (7) Another method for creating a seaweed bed of the present invention includes placing the seaweed bed growth reef structure of (4) in seawater, and using the algae nutrients dissolved from the particles containing algae nutrients contained in the plate pedestal, the algae attachment plate, and the base plate, germinating and growing seaweed from seed threads containing seaweed seeds placed on the seed attachment plate; Seeds are released from the grown seaweed, and the seeds grow on at least the uneven surface of the algae-growing plate body, The algae grow on the algae-growth plate by utilizing the algae nutrients dissolved from the particles contained in the plate base, base plate and algae-growth plate, and the seawater-biodegradable resin of the seed-mounting plate is biodegraded in seawater over time. This is a method for creating a seaweed bed, characterized in that seeds released from seaweed grown on an algae-growth plate are deposited on the seabed surrounding the plate base and / or base plate and / or seaweed bed growth reef structure, and a seaweed bed in which algae grow is created by utilizing algae nutrients eluted from the particles contained in the plate base, the algae-growth plate and the base plate. Effect of the Invention

[0020] The seaweed bed growth reef structure of the present invention can effectively supply algae with the nutrients necessary for their growth, realizing the formation of a seaweed bed in which algae can grow sufficiently and effectively, and can effectively store blue carbon produced by the algae, contributing to the realization of carbon neutrality. Furthermore, the seaweed bed growth reef structure of the present invention contributes to the marine environment by not emitting microplastics, and by effectively utilizing the carbon dioxide and waste materials in exhaust gases emitted from cement factories and the like, it can further contribute to the realization of carbon neutrality through the accumulation of blue carbon and the creation of a circular society.

[0021] Furthermore, by using the seaweed bed growth reef structure of the present invention, the method of creating a seaweed bed of the present invention can effectively supply nutrients necessary for algae growth, allowing the algae to grow sufficiently effectively, and can create a seaweed bed that can effectively store blue carbon from the algae, contributing to the realization of carbon neutrality. In addition, it contributes to the marine environment by not emitting microplastics, and effectively utilizes carbon dioxide in exhaust gases and waste materials emitted from cement factories, etc. as raw materials for some of the structures of the seaweed bed growth reef structure, making it possible to create seaweed beds that can further contribute to achieving carbon neutrality through the accumulation of blue carbon. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a schematic diagram of an example of a seaweed bed growth reef structure of the present invention installed on the seabed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The present invention will be described in the following preferred embodiments with reference to FIG. 1, but is not limited thereto.

[0024] The seaweed bed growth reef structure of the present invention is A plate base body comprising mortar or concrete, artificial calcium carbonate, and particles containing algae nutrients, the particles being scattered at least on the surface of the plate base body; A seed mounting plate body made of seawater biodegradable resin and artificial calcium carbonate, which is loaded on the plate base body; An algae-growth plate body comprising mortar or concrete, artificial calcium carbonate, and particles containing algae nutrients, the algae-growth plate body being loaded on the plate base body, the algae-growth plate body having an uneven surface at least on the surface not facing the plate base body, and the particles being scattered at least on the surface not facing the plate base body; Equipped with.

[0025] In the present invention, the algae is not particularly limited, and any algae that grows in the ocean can be used, such as eelgrass, Sargassum, and the like.

[0026] As shown in Fig. 1, a seaweed bed growth reef structure A according to an embodiment of the present invention comprises a plate base 1, a seed mounting plate 2, and an algae growing plate 3. It is preferable that the structure further comprises a base plate 4.

[0027] The plate base 1 that constitutes the seaweed bed growth reef structure A of the present invention is a plate base 1 containing mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae, and the particles are scattered at least on the surface of the base. Such a plate base 1 has a sufficient weight and strength to prevent the seaweed bed growth reef structure of the present invention from being moved by ocean currents or the like when installed on the seabed.

[0028] The plate base 1 includes mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae, and these materials can be mixed to prepare the base material. Specifically, the plate base 1 can be manufactured by blending and mixing the artificial calcium carbonate and the particles containing the nutrients when mixing cement and water to prepare mortar or concrete, or when mixing cement, water, and aggregate. If necessary, materials such as steel slag, blast furnace slag, and fly ash can also be mixed. Next, the base material prepared in this manner is formed into the desired shape. There are no particular limitations on the shape as long as the plates described below can be placed on the upper surface of the plate base 1 and the plate base has a weight and strength sufficient to prevent it from being moved by ocean currents, etc. For example, the plate base 1 can be cured and hardened into a shape such as a rectangular prism or square pillar, etc., to produce the plate base 1.

[0029] Alternatively, the plate base 1 contains mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae. When a material made by mixing mortar or concrete with artificial calcium carbonate, and further materials such as steel slag, blast furnace slag, fly ash, etc., which are mixed as necessary, is cured into a desired shape of the base, such as a rectangular parallelepiped or square prism, the plate base 1 can be manufactured, for example, by pouring the mixed material of concrete and artificial calcium carbonate into a formwork of the desired shape, and then scattering particles containing the nutrients on the surface and curing the material to harden it. This manufacturing method makes it possible to more reliably achieve scattering of the particles on the surface of the plate base 1.

[0030] Furthermore, the surface of the plate base 1 is preferably, but not limited to, a surface on which the plate body described below can be placed, and it is desirable that the entire surface, or at least the surface other than the areas on the plate base 1 where the plate body described below will be placed, have some unevenness. This makes it easier for seeds, spores, and roots from algae grown on the algae attachment plate 3 described below to settle, and makes it possible to cultivate algae on the plate base 1 as well.

[0031] The cement used as the raw material of the mortar or concrete constituting the plate base 1 can be any cement available on the market, such as ordinary Portland cement, high-early-strength Portland cement, extra-high-early-strength Portland cement, moderate-heat Portland cement, low-heat Portland cement, blast-furnace cement, silica cement, and fly ash cement. In addition, a foaming agent can be mixed into the material of the plate base 1 as necessary, so that the obtained plate base 1 has holes and an uneven surface. The holes formed can easily allow the seeds, spores, and roots of algae grown on the algae-adhering plate 3 described below to settle, and it becomes possible to further cultivate algae on the plate base 1.

[0032] Furthermore, the plate base 1 contains artificial calcium carbonate. The artificial calcium carbonate contained in the plate base 1 is not particularly limited, and any known artificial calcium carbonate or commercially available artificial calcium carbonate can be used. Preferably, the artificial calcium carbonate used is an artificial calcium carbonate synthesized using calcium contained in waste materials and carbon dioxide contained in exhaust gas from factories or the like. This will enable various facilities such as power plants, incinerators, cement plants, steel mills, and industrial facilities to reduce the amount of exhaust gases, including carbon dioxide, emitted into the atmosphere during their operations, and to recover and reuse them.It will also be possible to further contribute to the realization of carbon neutrality, where waste can be effectively utilized, and to the creation of a circular society.

[0033] As the artificial calcium carbonate, for example, exhaust gas containing carbon dioxide as an industrial product, air, or carbon dioxide contained in exhaust gas from the factory, such as carbon dioxide produced during the burning of cement clinker, is blown into sludge water discharged from a cement factory, a concrete factory, a concrete product factory, or the like, to cause a reaction with a hydration product in the sludge water to produce calcium carbonate, and the sludge water is recovered, thereby preparing the artificial calcium carbonate, and the obtained artificial calcium carbonate can be used in the present invention, but the preparation method is not limited to this, and artificial calcium carbonate prepared by any known method can be used in the present invention.

[0034] Such artificial calcium carbonate is used not only for the plate base 1 but also for the seed mounting plate 2, the algae attachment plate 3, and the base plate 4 described below. In this way, by incorporating artificial calcium carbonate, it is possible to conserve limestone resources and to effectively utilize waste materials, etc.

[0035] The plate base 1 also contains particles containing nutrient sources that serve as nutrients for the algae, and the particles may be scattered over at least the surface of the plate base 1, or may be scattered only over the plate surface. This allows the particles containing nutrient salts that serve as nutrients for algae and that are scattered on the surface of the plate base 1 to gradually elute the nutrient salts for algae into the seawater. Examples of algae nutrients include phosphorus, nitrogen, silicon, iron, copper, manganese, etc. At least one of these nutrients is contained in inorganic or organic particles to form particles containing algae nutrients used in the present invention, but the particles are configured so that the nutrients can be gradually dissolved in seawater. Examples of inorganic particles include chemical fertilizers such as ammonium sulfate and ammonium chloride, inorganic organic fertilizers, steel slag, iron, compost, and glass powder, and it is possible to use one or more of these inorganic particles. The inorganic particles are not particularly limited and can be made of any material that can be formed to contain the nutrients and gradually dissolve in seawater, for example, inorganic material particles themselves can be nutrients, or inorganic material particles can have nutrients present on their surfaces.

[0036] Preferably, the particles used are known seawater-biodegradable resins or seawater-biodegradable inorganic particles that contain nutrients that are utilized for the growth of algae, such as phosphorus, nitrogen, silicon, iron, copper, and manganese. A seawater-biodegradable resin is a resin that has excellent biodegradability in the ocean through the action of microorganisms and is ultimately completely decomposed into water and carbon dioxide. In the present invention, any known seawater-biodegradable resin can be used. When seawater-biodegradable particles are used, as the seawater-biodegradable resin and seawater-biodegradable inorganic matter decompose in seawater, the nutrients contained therein are gradually dissolved and become available for the growth of algae. Furthermore, the carbon dioxide produced by the decomposition of the seawater-biodegradable resin in seawater can be used for the photosynthesis of algae, further contributing to the growth of algae.

[0037] In addition, bolts, such as anchor bolts, are provided on the upper surface of the plate base body 1, and these bolts connect the plate base body 1 to the seed mounting plate body 2 described below, or to the base plate body 4 described below which is suitably installed, and further bolts separate from the above bolts are provided on the upper surface of the base body 1, and these bolts connect the seaweed bed attachment plate body 3 described below to the plate base body 1.

[0038] On the plate base 1, a seed mounting plate 2 made of seawater biodegradable resin and artificial calcium carbonate is placed. It is preferable to provide a gap between the plate base 1 and the seed mounting plate 2, which facilitates the gradual dissolution of nutrients into seawater from particles containing algae nutrients scattered on the surface of the plate base 1.

[0039] The artificial calcium carbonate constituting the seed mounting plate body 2 can be the same as the artificial calcium carbonate constituting the plate base body 1, and the seawater biodegradable resin used as a suitable composition for the particles of the plate base body 1 can also be used.

[0040] In recent years, environmental problems caused by waste plastics have been highlighted, and in particular, large amounts of plastics that have been dumped in the ocean or have flowed into the sea via rivers and other sources are drifting in the ocean on a global scale. Such plastics are broken down and atomized by ultraviolet rays and become microplastics, and it has been pointed out that these become a problem when marine organisms such as fish ingest them and incorporate them into the food chain. In the present invention, by using a marine biodegradable resin, microplastics are not discharged, which contributes to the marine environment.

[0041] The seawater biodegradable resin may be any seawater biodegradable resin available on the market, such as "Green Planet" (registered trademark of Kaneka) or "CAFBLO" (Daicel), which are seawater biodegradable resins whose main component is cellulose acetate (acetyl cellulose).

[0042] The seed mounting plate body 2 is a molded body that can be fixed to the plate base body 1 by mixing the above-mentioned artificial calcium carbonate with such seawater biodegradable resin, and can be of any shape as long as it can accommodate seed threads 5 carrying seaweed seeds.It is preferable that the seed mounting plate body 2 has a plurality of protrusions 6 for attaching the seed threads 5 that have been installed by planting seaweed seeds. Because it has such a suitable shape, the seed thread 5 can be attached by spanning it between multiple protrusions 6 protruding from one side (top surface), ensuring that the seed thread 5, which is used to plant algae seeds, will not be easily swept away by ocean currents, etc. For example, as the shape of the mounting plate, a seed mounting plate having the shape described in Patent Document 2 can be used.

[0043] Alternatively, the seed mounting plate body 2 can be arranged such that a seed thread 5 on which algae seeds are planted is wound around a plurality of protrusions 6 of the seed mounting plate body 2 and the plate body is suspended near the sea surface and allowed to germinate, and then the plate body is installed on the plate base body 1.

[0044] The seed mounting plate 2 used in the present invention is installed close to the plate base 1, the algae adhesion plate 3 described below, and the preferably installed base plate 4, so that the algae seeds and germinating bodies on the seed mounting plate 2 can easily grow by absorbing algae nutrients that gradually dissolve into the seawater from the plate base 1, the algae adhesion plate 3 described below, and the preferably installed base plate 4. In addition, the seeds are released from the grown algae and can attach to the plate base 1, the algae adhesion plate 3 described below, and the seabed around the seaweed bed growth reef structure of the present invention, thereby contributing to the formation of a rich seaweed bed. In addition, the seed mounting plate body 2 will be biodegraded over time when the seaweed bed is formed by the seaweed bed growth reef structure of the present invention, the growth of algae becomes abundant, and the incorporation of blue carbon becomes possible. As mentioned above, even if it is biodegraded, it does not emit microplastics, so it does not have a negative impact on the marine environment. Furthermore, the artificial calcium carbonate contained in the seed mounting plate body 2 has the same components as limestone, and even if the seed mounting plate body 2 decomposes, the artificial calcium carbonate contained therein will not have a negative effect on the marine environment.

[0045] The seed mounting plate body 2 has bolt holes for connection to the plate base body 1 or a base plate body 4 preferably provided as described below, and preferably a spacer is provided around the bottom surface of the plate (the surface on the plate base body 1 side) of the bolt hole. This makes it possible to provide a gap between the seed mounting plate body 2 and the plate base body 1, as described above. Furthermore, as described below, when a base plate body 4 is preferably provided between the plate base body 1 and the seed mounting plate body 2, the spacer makes it possible to provide a gap between the seed mounting plate 2 and the base plate body 4.

[0046] Preferably, a base plate assembly 4 is installed between the plate pedestal assembly 1 and the seed mounting plate assembly 2 as shown in FIG. The base plate body 4 is composed of mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae. The mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae can be the same mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae as the mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae that constitute the plate base 1.

[0047] The base plate body 4 can be manufactured in the same manner as the plate pedestal body 1, and nutrients necessary for algae can be gradually eluted from particles containing nutrients necessary for algae that are scattered on the surface of the base plate body 4. In particular, nutrients can be supplied to the seeds or germinating bodies of algae in the seed threads 5 of the seed mounting plate body 2 installed nearby, and nutrients can also be supplied to the algae as they grow.

[0048] Moreover, it is preferable that the surface of the base plate body 4 has an uneven shape. By having such a shape, after the seed-mounting plate body 2 is biodegraded, the seeds of algae and the like can be attached thereon, and the algae can be grown.

[0049] Furthermore, the base plate body 4 has bolt holes for connecting to the plate base body 1 and the seed mounting plate body 2, and is connected by bolts, such as anchor bolts, installed in the plate base body 1. As mentioned above, it is also desirable to provide a spacer around the bolt hole on the underside of the plate (the surface facing the plate base body 1), which makes it possible to provide a gap between the seed mounting plate body 2 and the base plate body 4, making it easier to supply nutrients from the base plate body 4 to the algae.

[0050] Furthermore, as shown in FIG. 1, a seaweed bed attachment plate body 3 is loaded on the seed mounting plate body 2 loaded on the plate base body 1, or preferably on the surface (upper surface) of the plate base body 1 on which the base plate body 4 is installed, in a position different from the positions at which these plate bodies are installed.

[0051] The seaweed bed growth plate 3 is composed of mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae. The seaweed bed growth plate 3 has a function of allowing algae seeds released from the algae cultivated on the seed attachment plate 2 to grow on it, forming a nucleus seaweed bed. The above-mentioned mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae can be the same mortar or concrete, artificial calcium carbonate, and particles containing nutrients necessary for algae that constitute the above-mentioned plate base body 1 and base plate body 4.

[0052] The seaweed bed growing plate body 3 can be manufactured in the same manner as the plate base body 1 described above. Particles containing nutrients necessary for algae are scattered on the surface of the seaweed bed growing plate body 3, so that nutrients necessary for the algae growing on each of the adjacent plate bodies, particularly the seaweed bed growing plate body 3, can be gradually eluted.

[0053] The surface of the seaweed bed attachment plate 3 has an uneven shape so that the algae seeds can easily take root, since it functions as a plate for forming a nucleus seaweed bed. This shape allows the attachment of seeds and the like released from the algae grown on the seed attachment plate 2, forming a nucleus seaweed bed and allowing the algae to grow effectively.

[0054] Furthermore, the seaweed bed growth plate body 3 has bolt holes for connection to the plate base body 1, and is connected by bolts, such as anchor bolts, installed in the plate base body 1. It is also preferable that spacers are provided around the bolt holes on the underside of the plate (the surface facing the plate base 1). This makes it possible to provide a gap between the seaweed bed attachment plate 3 and the plate base 1, making it easier to supply nutrients from the plate base 1 to the algae.

[0055] In addition, in order to protect the algae growing in the seaweed bed proliferation structure of the present invention from being eaten by marine organisms, an enclosure that does not interfere with ocean currents, such as a mesh enclosure, can be installed around the seaweed bed proliferation structure A, or at least around the seed mounting plate body 2 and the algae adhesion plate body 3, or, if a suitably installed base plate body 4 is provided, around the seed mounting plate body 2, the base plate body 4 and the algae adhesion plate body 3.

[0056] Furthermore, the above-mentioned seaweed bed attachment plate bodies 3 and / or seed mounting plate bodies 2 may be installed in multiple numbers as long as they can be installed on the upper surface of the plate base body 1, and multiple base plate bodies 4 can be installed as necessary to match the number of seed mounting plate bodies 2 installed.

[0057] Furthermore, the method for forming a seaweed bed of the present invention includes installing the seaweed bed growth reef structure of the present invention in seawater, and using the particles containing nutrients necessary for algae contained in the plate base body 1 and the algae attachment plate body 3, and the nutrients for algae dissolved from the particles contained in the base plate body 4 installed as necessary, germinating and growing seaweed from the seed threads 5 containing seaweed seeds installed in the seed attachment plate body 2, Seeds are released from the algae grown on the seed mounting plate 2, and the seeds attach to at least the uneven surface of the algae attachment plate 3, The algae grow on the algae-growth plate 3 using the particles contained in the plate base 1 and the algae-growth plate 3, and the algae nutrients dissolved from the particles contained in the base plate 4 installed as necessary. The seawater-biodegradable resin constituting the seed-mounting plate 2 is biodegraded in seawater over time, so that marine pollution by microplastics does not occur. Seeds released from the seaweed grown on the algae adhesion plate 3 settle on the plate base 1 and / or the seaweed bed growth reef structure A, a base plate 4 installed as necessary, and even on the seabed surrounding the seaweed bed growth reef structure of the present invention, and an excellent seaweed bed is created in which the algae grow by utilizing the algae nutrients eluted from the particles contained in the plate base 1 and the algae adhesion plate 3, and a base plate 4 installed as necessary.

[0058] In this way, by installing the seaweed bed growth reef structure of the present invention on the seabed, the nutrients of the algae contained in the seaweed bed growth reef structure will gradually dissolve in the seawater, promoting the growth of the algae, creating a rich seaweed bed that can store blue carbon. In addition, as the algae germinate and grow from the seed thread wrapped around the seed mounting plate body 2, the plate body will be biodegraded by microorganisms in the seawater, preventing marine pollution by microplastics. Furthermore, the use of artificial calcium carbonate that fixes carbon dioxide in exhaust gases will reduce the amount of carbon dioxide released into the atmosphere, contributing to carbon neutrality. [Industrial Applicability]

[0059] The seaweed bed growth reef structure and seaweed bed creation method of the present invention can prevent rocky shore bleaching, enable the creation of a seaweed bed where algae can grow effectively, and can be used to effectively store blue carbon produced by algae, contributing to the realization of carbon neutrality. [Explanation of symbols]

[0060] 1 Plate base body 2. Seed mounting plate body 3. Algal adhesion plate 4. Base plate body 5. Seed thread 6...protrusion A. Seaweed bed reef structure

Claims

1. A plate base body comprising mortar or concrete, artificial calcium carbonate, and particles containing algae nutrients, the particles being scattered at least on the surface of the plate base body; A seed mounting plate body made of seawater biodegradable resin and artificial calcium carbonate, which is loaded on the plate base body; An algae-growth plate body comprising mortar or concrete, artificial calcium carbonate, and particles containing algae nutrients, the algae-growth plate body being loaded on the plate base body, the algae-growth plate body having an uneven surface at least on the surface not facing the plate base body, and the particles being scattered at least on the surface not facing the plate base body; A seaweed bed growth reef structure comprising:

2. 2. A seaweed bed growth reef structure according to claim 1, wherein said seed mounting plate body has a plurality of projections for mounting seed threads containing algae seeds.

3. 3. The seaweed bed proliferation reef structure according to claim 1 or 2, wherein the artificial calcium carbonate is derived from a synthesis of calcium in waste materials and carbon dioxide in exhaust gas.

4. 3. The seaweed bed proliferation reef structure according to claim 1 or 2, further comprising a base plate body on the plate base body and between the seed mounting plate body and the plate base body, the base plate body being composed of mortar or concrete, artificial calcium carbonate, and particles containing nutrients for algae, the particles being scattered at least on the surface of the base plate body.

5. 5. The seaweed bed proliferation reef structure according to claim 4, wherein a gap is provided between the base plate body and the seed mounting plate body.

6. The seaweed bed growth reef structure according to claim 1 or 2 is placed in seawater, and seaweed is germinated and grown from the seed threads containing seaweed seeds placed on the seed mounting plate by utilizing the algae nutrients dissolved from the particles containing algae nutrients contained in the plate base and the algae attachment plate. Seeds are released from the grown algae, and the seeds attach to at least the uneven surface of the algae attachment plate body, The seaweed grows on the algae-growing plate by utilizing the algae nutrients dissolved from the particles contained in the plate base and the algae-growing plate, and the seawater-biodegradable resin of the seed mounting plate is biodegraded in seawater over time. A method for creating a seaweed bed, characterized in that seeds released from seaweed grown on an algae-growth plate are deposited on the seabed surrounding the plate base and / or the seaweed bed growth reef structure, and a seaweed bed in which algae grow is created by utilizing algae nutrients dissolved from the particles contained in the plate base and the algae-growth plate.

7. The seaweed bed growth reef structure according to claim 4 is placed in seawater, and seaweed is germinated and grown from the seed threads containing seaweed seeds placed on the seed mounting plate body by utilizing the algae nutrients dissolved from the particles containing algae nutrients contained in the plate base body, the algae attachment plate body and the base plate body. Seeds are released from the grown seaweed, and the seeds grow on at least the uneven surface of the algae-growing plate body, The algae grow on the algae-growth plate by utilizing the algae nutrients dissolved from the particles contained in the plate base, base plate and algae-growth plate, and the seawater-biodegradable resin of the seed-mounting plate is biodegraded in seawater over time. A method for creating a seaweed bed, characterized in that seeds released from seaweed grown on an algae-growth plate are deposited on the seabed surrounding the plate base and / or base plate and / or seaweed bed growth reef structure, and a seaweed bed in which algae grow is created by utilizing algae nutrients eluted from the particles contained in the plate base, the algae-growth plate and the base plate.

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