Glass composition for algae growth and method for producing glass powder thereof

Abstract

The present invention discloses a glass composition for growing algae, which is embodied as a water-soluble glass by adding trace metal oxides containing inorganic components that aid in the growth of marine plants, and which can appropriately supply nutrients to seaweed, etc., and a method for manufacturing the glass powder thereof. As a result, the glass composition for growing algae and the method for manufacturing the glass powder thereof according to the present invention can maximize and effectively promote the cultivation of diatoms.

Description

[Technical Field]

[0001] The present invention relates to a glass composition for growing algae and a method for producing a glass powder thereof. [Background technology]

[0002] The fisheries industry in Korea is experiencing a decline in production due to a labor shortage caused by a declining and aging fishing population, climate change, and a decline in marine resources. Therefore, aquaculture is a promising industry for the future and is also an extremely important industry in terms of ensuring food security.

[0003] In order to transform aquaculture into a sustainable industry, thorough environmental management of the production space for aquaculture organisms is necessary. In order to grow aquaculture organisms well, proper water quality and protection from diseases are basic requirements. In addition, it is very important to provide the nutrients that aquaculture organisms need.

[0004] At the bottom of the marine chain, plants such as algae and phytoplankton derive nutrients from solar energy and certain inorganic elements.

[0005] Therefore, it is necessary to develop a glass material that can continuously supply specific inorganic components for a long period of time. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Republic of Korea Patent Publication No. 10-2014-0123130 (published on October 22, 2014) Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a glass composition for growing algae, which is embodied as a water-soluble glass to which trace metal oxides containing inorganic components that aid in the growth of marine plants are added, and which can appropriately supply nutrients to seaweeds, etc., and a method for manufacturing the glass powder thereof.

[0008] A further object of the present invention is to provide a glass composition for growing algae, which can continuously supply inorganic components for a long period of time to promote the growth of microalgae, and a method for producing a glass powder thereof.

[0009] Another object of the present invention is to provide a glass composition for algae growth, which is composed of components required in microalgae culture systems and farms, and which can precisely control the degree of dissolution in water to appropriately supply nutrients, and a method for producing a glass powder thereof.

[0010] The objects of the present invention are not limited to those mentioned above, and other objects and advantages of the present invention not mentioned above can be understood from the following description and can be more clearly understood from the examples of the present invention. Furthermore, it can be easily understood that the objects and advantages of the present invention can be achieved by the means and combinations thereof set forth in the claims. [Means for solving the problem]

[0011] The glass composition for algae cultivation and the method for manufacturing the glass powder thereof according to the present invention are embodied as water-soluble glass that is easily dissolved in water by adding trace metal oxides containing inorganic components that aid in the growth of marine plants, and can appropriately supply nutrients to seaweeds, etc.

[0012] As a result, the glass composition for growing algae and the method for producing the glass powder thereof according to the present invention can promote and culture diatoms to the maximum extent and most effectively.

[0013] Furthermore, the glass composition for growing algae and the method for producing glass powder thereof according to the present invention continuously supply inorganic components for a long period of time, thereby promoting the growth of microalgae.

[0014] Therefore, the glass composition for algae growth and the method for producing the glass powder thereof according to the present invention are composed of components required in microalgae culture systems and farms, and the degree of dissolution in water can be precisely controlled to appropriately supply nutrients.

[0015] In addition, when the glass composition for algae growth and the method for manufacturing the glass powder thereof according to the present invention are used as a glass fertilizer for promoting the growth of seaweed, they can be manufactured into plates or packs and placed in seaweed growth spots such as artificial reefs to supply marine organisms with the inorganic nutrients they need per hour at an appropriate volume, thereby creating a marine forest.

[0016] For this purpose, the glass composition for growing algae according to an embodiment of the present invention comprises 1 to 50 wt% of SiO2; 20 to 70 wt% in total of one or more of B2O3 and P2O5; 1 to 30 wt% in total of one or more of Na2O and K2O; 0.1 to 30 wt% in total of one or more of MgO and CaO; and 0.1 to 30 wt% of trace metal oxides, the trace metal oxides including (comprising; constituting; constructing; setting; encapsulating; including; containing; having) one or more selected from Fe2O3, CuO, NiO2, Co3O4, CdO, and ZnO.

[0017] Here, SiO2 is preferably added in an amount of 10 to 30% by weight.

[0018] It is also preferable that B2O3 is added in an amount of 15 to 35% by weight, and P2O5 is added in an amount of 1 to 20% by weight.

[0019] Furthermore, it is preferable that Na2O is added in an amount of 1 to 10% by weight, and K2O is added in an amount of 10 to 29% by weight.

[0020] The trace metal oxides are at least one of Fe2O3 and ZnO, and are added in a total amount of 20 to 30% by weight.

[0021] Here, the trace metal oxides are one or more of CuO, NiO2, Co3O4, and CdO, added in a total amount of 5 wt % or less. [Effects of the Invention]

[0022] According to the present invention, trace metal oxides containing inorganic components that aid in the growth of marine plants are added to the glass, which is easily dissolved in water, and can provide nutrients to seaweeds and the like.

[0023] As a result, according to the present invention, diatoms can be cultured in a manner that promotes diatom cultivation to the maximum extent and effectively.

[0024] Furthermore, according to the present invention, inorganic components are continuously supplied for a long period of time, thereby promoting the growth of microalgae.

[0025] Therefore, according to the present invention, the composition is made up of components required in microalgae culture systems and farms, and the degree of dissolution in water can be precisely controlled to appropriately supply nutrients.

[0026] In addition, according to the present invention, when used as a glass fertilizer for promoting the growth of seaweed, it can be manufactured into plates or packs and placed in seaweed growth spots such as artificial reefs to supply marine organisms with the inorganic nutrients they need per hour at an appropriate volume, thereby creating a marine forest.

[0027] Furthermore, the present invention has an excellent effect in removing algae that cause red tides.

[0028] Furthermore, the present invention can serve as a source of food for abalone farms.

[0029] Additionally, the present invention allows for customizing of the nutrients provided.

[0030] The above-mentioned effects and specific effects of the present invention will be described in conjunction with the following description of the preferred embodiment of the invention. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a process flow diagram illustrating a method for manufacturing glass powder for growing algae according to an embodiment of the present invention. [Figure 2] 1 is a graph showing measurement results of OD (Optical Density 680 nm) absorbance according to the growth progress of diatoms using antibacterial glass according to Example 1 and Comparative Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0032] The above-mentioned objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily implement the technical concept of the present invention. In describing the present invention, if a detailed description of known technologies relating to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0033] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. Terms such as "comprise" or "include" in this application should not be interpreted as including all of the multiple components or multiple steps described in the specification, but should be interpreted as meaning that some of the components or some of the steps may not be included, or that additional components or steps may be further included.

[0034] In the following, several embodiments of the glass composition for growing algae and a method for producing the glass powder thereof according to the present invention will be described.

[0035] The glass composition for growing algae according to an embodiment of the present invention is made into a water-soluble glass by adding trace metal oxides containing inorganic components that aid in the growth of marine plants, and is capable of supplying nutrients to seaweeds and the like in an appropriate amount.

[0036] As a result, the glass composition for growing algae according to the embodiment of the present invention can promote and culture diatoms to the maximum extent and effectively.

[0037] Diatoms are a type of microalgae measuring approximately 10-200 μm in size and can grow in freshwater or seawater by suspended or attached growth wherever light, nutrients, and moisture are available. Diatoms produce organic matter through photosynthesis across a wide area of ​​the globe, accounting for 40% of marine organisms' productivity and 25% of the world's total organic matter production. In particular, unlike other algae, diatoms grow by forming porous biosilica on their outer edges, and the size and distribution of pores vary depending on the species, resulting in a highly dimensional structure.

[0038] These diatoms can be mass-produced and are effectively used across a wide range of industries, including biofertilizers, food and pharmaceuticals, feed and additives, wastewater treatment and environmental cleanup, and alternative energy.

[0039] As such, the cultivation of diatoms with various utilization levels is gaining increasing interest in the industry. Therefore, the glass composition for growing algae according to the embodiment of the present invention can maximize and effectively promote the cultivation of these diatoms.

[0040] Furthermore, the glass composition for growing algae according to the embodiment of the present invention continuously supplies inorganic components for a long period of time, thereby promoting the growth of microalgae.

[0041] The fisheries industry in Korea is experiencing a decline in fisheries production due to a labor shortage caused by a declining and aging fishing population, climate change, and a decrease in marine resources. Therefore, the aquaculture industry is a promising future industry and is extremely important in terms of ensuring food security. To transform aquaculture into a sustainable industry, thorough environmental management of the production space for aquaculture organisms is necessary.

[0042] In order to grow cultured organisms well, proper water quality and protection from diseases are basic requirements. In addition, it is very important to provide the nutrients required by the cultured organisms. Algae and plants such as phytoplankton, which are at the bottom of the marine biology chain, obtain nutrients from solar energy and specific inorganic components. Therefore, the glass composition for growing algae according to the embodiment of the present invention embodies a material that can continuously supply these inorganic components for a long period of time.

[0043] Furthermore, the durability of the glass composition for algae cultivation according to the embodiment of the present invention is easily controlled. Typically, glass compositions are used in industry by enhancing their durability and chemical resistance. However, conversely, glass compositions can be used in bioactivities, pharmaceuticals, cosmetics, etc. by maximizing elution. That is, the glass composition can be very robust or very soluble, allowing for the development of new structures.

[0044] The glass composition for algae cultivation according to the embodiment of the present invention continuously supplies inorganic components during cultivation. The inorganic components that generally aid plant growth are well known to be P, K, Na, Fe, Mn, Cu, Zn, Ni, B, Mg, Ca, etc. Furthermore, it is possible to realize a water-soluble glass composition that is easily soluble in water through the oxides containing the above-listed components.

[0045] Therefore, the glass composition for growing algae according to the embodiment of the present invention is composed of components required for microalgae cultivation systems and farms, and the degree of dissolution in water can be precisely controlled to appropriately supply nutrients.

[0046] In addition, the glass composition for algae cultivation according to the embodiment of the present invention can be used as a long-lasting marine fertilizer. Generally, in order to mitigate the desertification of coastal waters, fertilizers that promote the growth and proliferation of seaweed are spread, but the fertilizers are often lost or quickly dissolved by high ocean waves, making it difficult to achieve the expected effect.

[0047] However, when the glass composition for algae growth according to the embodiment of the present invention is used as a glass fertilizer for promoting the growth of seaweed, it can be made into a plate or pack shape and placed in a seaweed growth spot such as an artificial reef to supply an appropriate amount of inorganic nutrients required per hour to marine organisms, thereby creating a marine forest.

[0048] Furthermore, the glass composition for growing algae according to the present invention is highly effective in removing algae that cause red tides. In the case of dinoflagellate (Cochlodinium polykrikoides), one of the causes of red tides, its growth rate significantly decreases when it grows in the presence of diatoms (Skeletonema costatum) or phytoplankton (Chaetoceros danicus). This is because diatoms inhibit the growth and swimming speed of the dinoflagellate. In other words, if nutrients that allow diatoms to grow effectively are supplied to the ocean, their dominance effect will increase, and the occurrence of red tides in the ocean can be delayed or prevented.

[0049] Furthermore, the glass composition for growing algae according to the embodiment of the present invention can serve as a food source for abalone farms. To cultivate the attached diatoms used as the initial food source for abalone, a culture medium of a certain concentration must be continuously supplied. However, the water-soluble glass composition can provide a constant ion capacity, facilitating the growth of diatoms, increasing productivity, and enabling the mass production of healthy abalone juveniles.

[0050] Furthermore, glass compositions for algae cultivation according to embodiments of the present invention can be customized to supply nutrients. Since the types and proportions of inorganic nutrients required vary depending on the type of marine organism (algae) whose growth is to be promoted, glass compositions can be manufactured that can optimally activate growth promotion depending on the target algae.

[0051] For this purpose, the glass composition for growing algae according to an embodiment of the present invention contains 1 to 50 wt% of SiO2; 20 to 70 wt% in total of one or more of B2O3 and P2O5; 1 to 30 wt% in total of one or more of Na2O and K2O; 0.1 to 30 wt% in total of one or more of MgO and CaO; and 0.1 to 30 wt% of trace metal oxides, the trace metal oxides including one or more selected from Fe2O3, CuO, NiO2, Co3O4, CdO, and ZnO.

[0052] Here, SiO2 is preferably added in an amount of 10 to 30% by weight.

[0053] It is also preferable that B2O3 is added in an amount of 15 to 35% by weight, and P2O5 is added in an amount of 1 to 20% by weight.

[0054] Furthermore, it is preferable that Na2O is added in an amount of 1 to 10% by weight, and K2O is added in an amount of 10 to 29% by weight.

[0055] The trace metal oxides are at least one of Fe2O3 and ZnO, and are added in a total amount of 20 to 30% by weight.

[0056] Here, the trace metal oxides are one or more of CuO, NiO2, Co3O4, and CdO, added in a total amount of 5 wt % or less.

[0057] Hereinafter, the role and content of each component of the glass composition for growing algae according to the embodiment of the present invention will be described in detail.

[0058] SiO2 is a growth nutrient for diatoms, a glass former that improves the forming ability of glass compositions and enables vitrification, and from the structural aspect of glass, it is a core component that acts as a framework.

[0059] The SiO2 is preferably added in an amount of 1 to 50 wt% of the total weight of the glass composition for growing algae according to the present invention, more preferably 10 to 30 wt%, and most preferably 15 to 25 wt%. If the amount of SiO2 added is less than 1 wt%, there will be insufficient network-forming oxides, and the glass will fall outside the vitrification range, resulting in opalescence or heterogeneity, with transparent glass being mixed in. Conversely, if the amount of SiO2 added exceeds 50 wt%, the glass bond structure will be so rigid that it will not dissolve easily in water or devitrification may occur.

[0060] B2O3 and P2O5 are typical network-forming oxides and, together with SiO2, are key components that enable sufficient vitrification.

[0061] Like SiO2, B2O3 acts as a glass former, allowing for sufficient vitrification. However, compared to SiO2, it lowers the glass transition temperature and melting temperature, and reduces chemical durability. In other words, B2O3 is the main component that makes materials more soluble in water. Although seawater already contains sufficient B2O3 for plant growth, an appropriate amount of B2O3 must be added to create water-soluble glass.

[0062] Glasses to which P2O5 is added as a glass former have low chemical durability due to the double-bonded oxygen, and are more hydrophilic and soluble in water than other oxide components. An appropriate amount of P can greatly aid plant growth. It is also the component that causes green algae in the summer.

[0063] At least one of B2O3 and P2O5 is preferably added in a total content of 20 to 70 wt% of the total weight of the glass composition for growing algae according to the present invention, and more preferably in a range of 20 to 40 wt%.

[0064] If the combined amount of B2O3 and / or P2O5 is less than 20 wt%, the hydrophilicity may be weak and the glass may not dissolve easily in water. Conversely, if the combined amount of B2O3 and / or P2O5 is more than 70 wt%, the glass may form a rigid bond structure, making the glass less soluble in water or causing devitrification.

[0065] Here, it is more preferable that B2O3 is added in an amount of 15 to 35% by weight, and P2O5 is added in an amount of 1 to 20% by weight.

[0066] Alkali oxides such as Na2O and K2O cannot directly cross-link with oxygen within the glass structure, and are therefore said to exist in the form of ions. Furthermore, the larger the ionic radius and lower the valence of alkali oxides such as Na2O and K2O, the weaker the electric field strength and the weaker their ability to attract oxygen. Because these alkali oxides, such as Na2O and K2O, do not form strong bonds within glass, they are easily soluble in water, helping to support the process and also functioning as nutrients for living organisms. K, in particular, is a substance widely used as a fertilizer along with N and P.

[0067] The total content of one or more of Na2O and K2O is preferably 1-30 wt% of the total weight of the glass composition for growing algae according to the present invention, and more preferably 20-30 wt%. If the total content of one or more of Na2O and K2O is less than 1 wt%, there may be insufficient flux, resulting in the glass falling outside the vitrification range and forming unmelted material. Conversely, if the total content of one or more of Na2O and K2O exceeds 30 wt%, the glass may form a rigid bond structure, making it difficult to dissolve in water or causing devitrification.

[0068] Here, it is more preferable that Na2O is added in an amount of 1 to 10% by weight, and K2O is added in an amount of 10 to 29% by weight.

[0069] Alkaline earth oxides such as CaO and MgO essentially function as non-crosslinking modifiers in glass. While they cannot form glass by themselves, they can be formed by mixing them with network formers such as SiO2 and B2O3 in a certain ratio. Furthermore, the electric field strength generated by the cations of alkali metals is relatively weaker than that of alkaline earth metals.

[0070] These alkaline earth oxides, such as CaO and MgO, are not tightly bound within the glass, making them soluble in water and helping to support the growth of living organisms.

[0071] The combined content of one or more of CaO and MgO is preferably 0.1 to 30 wt. % of the total weight of the glass composition for growing algae according to the present invention, and more preferably 0.1 to 5 wt. If the combined content of one or more of CaO and MgO is less than 0.1 wt. %, the structural integrity of the modifying oxide sites is not maintained, and alkali elution cannot be prevented, resulting in a decrease in water resistance. Conversely, if the combined content of one or more of CaO and MgO exceeds 30 wt. The alkaline earth oxides, which melt at high temperatures, cannot be sufficiently melted, resulting in the glass composition being outside the vitrification range and resulting in the formation of unmelted material.

[0072] When glass is dissolved in seawater, trace metal oxides also help the growth of marine plants and are essential micronutrients for the growth of phytoplankton. These trace metal oxides include one or more selected from Fe2O3, CuO, NiO2, Co3O4, CdO, and ZnO. The dissolved metal elements typically found in seawater are in the range of 10 -12 ~10 -9They exist in concentrations of mol / L and are called trace elements or trace metals due to their low concentrations. Iron (Fe), copper (Cu), nickel (Ni), cobalt (Co), cadmium (Cd), zinc (Zn), etc. in trace metal oxides are micronutrients essential for the growth of phytoplankton in the marine environment.

[0073] Therefore, the glass composition for algae growth according to the present invention contains trace metal oxides that act as trace nutrients essential for the growth of phytoplankton in marine environments, so that when the glass is dissolved, it also becomes nutrients for marine plants.

[0074] The trace metal oxides are preferably added in an amount of 0.1 to 30 wt% of the total weight of the glass composition for growing algae according to the present invention, with a more preferred range being 20 to 30 wt%. If the amount of trace metal oxide added is less than 0.1 wt%, the effect of growing algae in a marine environment may be insufficient. Conversely, if the amount of trace metal oxide added is greater than 30 wt%, the metal oxides cannot exist in an ionic state in the glass under homogeneous conditions, and instead partially crystallize, falling outside the vitrification range, resulting in opalescence and heterogeneity, with transparent glass being mixed in.

[0075] Of these trace metal oxides, one or more of Fe2O3 and ZnO are preferably added in a total amount of 20 to 30 wt %.Furthermore, the trace metal oxides are preferably one or more of CuO, NiO2, Co3O4, and CdO, which are added in a total amount of 5 wt % or less.

[0076] Hereinafter, a method for producing glass powder for growing algae according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0077] FIG. 1 is a process flow diagram showing a method for producing glass powder for growing algae according to an embodiment of the present invention.

[0078] As shown in FIG. 1, a method for producing glass powder for growing algae according to an embodiment of the present invention includes a mixing step (S110), a melting step (S120), a cooling step (S130), and a crushing step (S140).

[0079] mixture In the mixing step (S110), 1 to 50 wt% of SiO2, 20 to 70 wt% of one or more of B2O3 and P2O5, 1 to 30 wt% of one or more of Na2O and K2O, 0.1 to 30 wt% of one or more of MgO and CaO, and 0.1 to 30 wt% of trace metal oxides are mixed and stirred to form a glass composition for growing algae.

[0080] Here, SiO2 is preferably added in an amount of 10 to 30% by weight.

[0081] It is also preferable that B2O3 is added in an amount of 15 to 35% by weight, and P2O5 is added in an amount of 1 to 20% by weight.

[0082] Furthermore, it is preferable to add Na2O in an amount of 1 to 10% by weight, and K2O in an amount of 10 to 29% by weight.

[0083] It is more preferable that the trace metal oxides added are one or more of Fe2O3 and ZnO in a total amount of 20 to 30% by weight.

[0084] Here, the trace metal oxides are one or more of CuO, NiO2, Co3O4, and CdO, added in a total amount of 5 wt % or less.

[0085] Melting In the melting step (S120), the glass composition for growing algae is melted.

[0086] In this stage, melting is preferably carried out at 1,000 to 1,300°C for 30 to 90 minutes. If the melting temperature is below 1,000°C or the melting time is less than 30 minutes, the glass composition for growing algae will not be completely melted, resulting in immiscibility of the glass melt. Conversely, if the melting temperature exceeds 1,300°C or the melting time exceeds 90 minutes, excessive energy and time are required, which is not economical.

[0087] cooling In the cooling step (S130), the molten glass composition for growing algae is cooled.

[0088] In this stage, the cooling is preferably performed by furnace cooling, since if air cooling or water cooling is applied, excessive internal stress in the glass may be generated, which may cause cracks in some cases.

[0089] crushing In the crushing step (S140), the cooled glass for growing algae is crushed to obtain glass powder for growing algae.

[0090] In this case, the pulverization can be performed using any one of the commonly known ball mill, jet mill, and planetary mill.

[0091] The glass is finely pulverized by these grinding processes to produce glass powder for growing algae. These glass powders for growing algae preferably have an average diameter of 100 μm or less, and more preferably, an average diameter in the range of 30 to 60 μm.

[0092] Through the above steps (S110 to S140), a glass powder for growing algae according to an embodiment of the present invention can be manufactured.

[0093] The glass powder for algae cultivation manufactured by the method according to the embodiment of the present invention is embodied as water-soluble glass by adding trace metal oxides containing inorganic components that help the growth of marine plants, and can appropriately supply nutrients to seaweeds, etc.

[0094] As a result, the glass powder for growing algae produced by the method according to the embodiment of the present invention can promote and culture diatoms to the maximum extent and effectively.

[0095] In addition, the glass powder for algae cultivation manufactured by the method according to the embodiment of the present invention continuously supplies inorganic components for a long period of time, thereby promoting the growth of microalgae.

[0096] Therefore, the glass powder for algae cultivation manufactured by the method according to the embodiment of the present invention is composed of components required for microalgae cultivation systems and farms, and the degree of dissolution in water can be precisely controlled to appropriately supply nutrients.

[0097] Furthermore, when the glass powder for algae growth manufactured by the method according to the embodiment of the present invention is used as a glass fertilizer for promoting the growth of seaweed, it can be made into a plate or pack shape and placed in a seaweed growth spot such as an artificial reef to supply an appropriate amount of inorganic nutrients required per hour to marine organisms, thereby creating a marine forest.

[0098] Furthermore, the glass powder for growing algae produced by the method according to the embodiment of the present invention has an excellent effect in removing algae that cause red tides.

[0099] In addition, the glass powder for algae cultivation manufactured by the method according to the embodiment of the present invention can play a role in providing food organisms for abalone farms.

[0100] Furthermore, the glass powder for algae growth produced by the method according to the embodiment of the present invention allows for customization of the nutrients supplied.

[0101] [Embodiment] Example The following provides a more detailed explanation of the structure and operation of the present invention by way of preferred examples, which are presented as preferred examples of the present invention and are not to be construed as limiting the present invention in any way.

[0102] The contents not described here will not be explained here because they can be fully inferred by those skilled in the art.

[0103] 1. Preparation of Glass Powder Samples Table 1 shows the compositions and compositional ratios of the glass compositions according to Examples 1-2 and Comparative Examples 1-4. The glass compositions prepared to have the compositions described in Examples 1-2 and Comparative Examples 1-4 were melted for 1 hour in an electric furnace maintained at 1,200°C. The molten glass was then cooled to a glass bulk state on a stainless steel plate by air cooling. The cooled bulky glass was then pulverized using a jet mill and passed through a 150-mesh sieve to remove particles with an average particle size of 100 μm or less. The raw materials used were SiO2, B2O3, NH4H2PO4, Na2CO3, K2CO3, MgO, CaCO3, Fe2O3, CuO, NiO2, Co3O4, CdO, and ZnO. Furthermore, vitrification was classified based on whether the glass exhibited uniform glass properties or whether it exhibited opalescence and unmelted material.

[0104] 2. Marine microalgae cultivation Diatoms are single-celled photosynthetic plants ranging in size from one to several hundred microns that perform extremely important ecological functions. These diatoms remove over 20% of the carbon dioxide in the atmosphere, an amount comparable to the carbon dioxide removed by all the tropical forests on Earth. They also produce 20-50% of the Earth's oxygen and are found throughout the oceans, including estuaries, coasts, and polar regions, as well as on land in rivers, lakes, and soil. The high survival rate and rapid growth of these diatoms can have significant environmental benefits, and fertilization for these diatoms can significantly improve the marine environment.

[0105] Therefore, in this example, to confirm the effect of microalgae growth, PT (Phaeodactylum tricornutum), a type of diatom, was cultivated. PT (Phaeodactylum tricornutum) is a coastal diatom abundant in the ocean, has excellent adaptability to unstable environments, and is easy to cultivate.

[0106] 3. Microalgae growth test To test the growth effect of PT (Phaeodactylum tricornutum), F / 2 medium was prepared in sterilized seawater and inoculated with the provided diatom culture solution in a T-flask. The seawater composition is shown in Table 2, and the F / 2 medium composition is shown in Tables 3 and 4.

[0107] [Table 1]

[0108] [Table 2]

[0109] [Table 3]

[0110] [Table 4]

[0111] 4. Diatom growth transition test Table 5 shows the measurement results of OD (Optical Density 680 nm) absorbance over time for diatom growth using antibacterial glass according to Example 1 and Comparative Example 1, and FIG. 2 is a graph showing the measurement results of OD (Optical Density 680 nm) absorbance over time for diatom growth using antibacterial glass according to Example 1 and Comparative Example 1. Three flasks inoculated with diatom culture medium were prepared, and 500 mg / L of glass powder prepared according to Example 1 and Comparative Example 1 was added to two flasks, while no glass powder was added to the remaining flask (base flask). The growth effect of microalgae was confirmed. The culture conditions were continuous aeration with air and a light intensity of 3000 lux for 12 hours. The temperature was maintained at 25°C and the agitation was at 150 rpm.

[0112] [Table 5]

[0113] As shown in Table 1, the glass compositions according to Examples 1 and 2 and Comparative Examples 1 to 3 were vitrified, but the glass composition according to Comparative Example 4 was not vitrified.

[0114] In addition, as shown in Tables 2 to 5 and FIG. 2, a comparison of the absorbance at OD (Optical Density, 680 nm) according to the growth progress of diatoms showed that the growth rate of diatoms in the flask containing glass powder according to Example 1 was significantly higher than that in the flask containing no glass powder and the flask containing glass powder according to Comparative Example 1.

[0115] Although the present invention has been described above with reference to illustrative drawings, the present invention is not limited to the embodiments and drawings disclosed in this specification, and it is clear that various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configurations of the present invention are not explicitly described in the above-described embodiments of the present invention, it is natural that the effects that can be predicted by the configurations should also be recognized.

[0116] [Claims at the time of international application] [Claim 1] A glass composition for growing algae, comprising: 1-50 wt% of SiO2; 20 to 70% by weight of one or more of B2O3 and P2O5 in total; one or more of Na2O and K2O in a total amount of 1 to 30% by weight; One or more of MgO and CaO in a total amount of 0.1 to 30% by weight; and 0.1 to 30% by weight of trace metal oxides; A glass composition for growing algae, wherein the trace metal oxides include one or more selected from the group consisting of Fe2O3, CuO, NiO2, Co3O4, CdO, and ZnO. [Claim 2] 2. The glass composition for growing algae according to claim 1, wherein said SiO2 is added in an amount of 10 to 30% by weight. [Claim 3] The B2O3 is added in an amount of 15 to 35% by weight, 2. The glass composition for growing algae according to claim 1, wherein the P2O5 is added in an amount of 1 to 20% by weight. [Claim 4] The Na2O is added in an amount of 1 to 10% by weight, 2. The glass composition for growing algae according to claim 1, wherein the K2O is added in an amount of 10 to 29% by weight. [Claim 5] 2. The glass composition for growing algae according to claim 1, wherein the trace metal oxides are at least one of Fe2O3 and ZnO, added in a total amount of 20 to 30% by weight. [Claim 6] 2. The glass composition for growing algae according to claim 1, wherein the trace metal oxide is one or more of CuO, NiO2, Co3O4, and CdO, added in a total amount of 5% by weight or less. [Claim 7] A method for producing glass powder for growing algae, comprising: (a) 1 to 50 wt. % of SiO2; One or more of B2O3 and P2O5 are present in a total amount of 20 to 70% by weight, one or more of Na2O and K2O in a total amount of 1 to 30% by weight, One or more of MgO and CaO in a total amount of 0.1 to 30% by weight, and 0.1 to 30% by weight of trace metal oxides and stirring to form a glass composition for growing algae; (b) melting the glass composition for growing algae; (c) cooling the molten algae growth glass composition; (d) crushing the cooled algae growing glass to obtain an algae growing glass powder; A method for producing a glass powder for growing algae, wherein in step (a), the trace metal oxides include one or more selected from the group consisting of Fe2O3, CuO, NiO2, Co3O4, CdO, and ZnO. [Claim 8] 8. The method for producing a glass powder for growing algae according to claim 7, wherein in step (a), the SiO2 is added in an amount of 10 to 30% by weight. [Claim 9] In the step (a), The B2O3 is added in an amount of 15 to 35% by weight, 8. The method for producing a glass powder for growing algae according to claim 7, wherein the P2O5 is added in an amount of 1 to 20% by weight. [Claim 10] In the step (a), The Na2O is added in an amount of 1 to 10% by weight, 8. The method for producing a glass powder for growing algae according to claim 7, wherein the K2O is added in an amount of 10 to 29% by weight. [Claim 11] 8. The method for producing a glass powder for growing algae according to claim 7, wherein in step (a), the trace metal oxides are at least one of Fe2O3 and ZnO, added in a total amount of 20 to 30 wt %. [Claim 12] 8. The method for producing a glass powder for growing algae according to claim 7, wherein in step (a), the trace metal oxide is one or more of CuO, NiO2, Co3O4, and CdO, added in a total amount of 5% by weight or less. [Claim 13] 8. The method for producing a glass powder for growing algae according to claim 7, wherein in step (b), the melting is carried out at 1,000 to 1,300° C. for 30 to 90 minutes. [Claim 14] 8. The method for producing glass powder for growing algae according to claim 7, wherein in step (b), the glass powder for growing algae has an average diameter of 100 μm or less. [Explanation of symbols]

[0117] S110 Mixing Stage S120 Melting stage S130 Cooling stage S140 Crushing stage

Claims

1. A glass composition for growing algae, comprising: SiO ２ 1 to 50% by weight of; B ２ O ３ and P ２ O ５ 20 to 70% by weight of one or more of the above in total; Na ２ O and K ２ one or more of O in a total amount of 1 to 30% by weight; One or more of MgO and CaO in a total amount of 0.1 to 30% by weight; and 0.1 to 30% by weight of trace metal oxides; The trace metal oxide is Fe ２ O ３ , CuO, NiO ２ , Co ３ O ４ , CdO, and ZnO.

2. The SiO ２ 2. The glass composition for growing algae according to claim 1, wherein the amount of added is 10 to 30% by weight.

3. B ２ O ３ is added at 15-35 wt. %; The P ２ O ５ 2. The glass composition for growing algae according to claim 1, wherein the amount of added is 1 to 20% by weight.

4. The Na ２ O is added in an amount of 1 to 10 wt %; The above K ２ 2. The glass composition for growing algae according to claim 1, wherein O is added in an amount of 10 to 29% by weight.

5. The trace metal oxide is Fe ２ O ３ 2. The glass composition for growing algae according to claim 1, wherein one or more of ZnO and ZnO are added in a total amount of 20 to 30% by weight.

6. The trace metal oxides include CuO and NiO. ２ , Co ３ O ４ 2. The glass composition for growing algae according to claim 1, wherein one or more of the following are added in a total amount of 5% by weight or less:

7. A method for producing glass powder for growing algae, comprising: (a) SiO ２ 1 to 50% by weight of B ２ O ３ and P ２ O ５ 20 to 70% by weight of one or more of the above in total, Na ２ O and K ２ O in a total amount of 1 to 30% by weight, one or more of MgO and CaO in a total amount of 0.1 to 30% by weight, and 0.1-30% by weight of trace metal oxides and stirring to form an algae growth glass composition; (b) melting the glass composition for growing algae; (c) cooling the molten algae growth glass composition; (d) crushing the cooled algae growing glass to obtain an algae growing glass powder; In the step (a), the trace metal oxide is Fe ２ O ３ , CuO, NiO ２ , Co ３ O ４ , CdO, and ZnO.

8. In the step (a), the SiO ２ The method for producing a glass powder for growing algae according to claim 7, wherein the amount of is added in an amount of 10 to 30% by weight.

9. In the step (a), B ２ O ３ is added at 15 to 35% by weight, The P ２ O ５ The method for producing a glass powder for growing algae according to claim 7, wherein the amount of is added in an amount of 1 to 20% by weight.

10. In the step (a), The Na ２ O is added in an amount of 1 to 10 wt %; The above K ２ 8. The method for producing a glass powder for growing algae according to claim 7, wherein O is added in an amount of 10 to 29% by weight.

11. In the step (a), the trace metal oxide is Fe ２ O ３ 8. The method for producing a glass powder for growing algae according to claim 7, wherein one or more of ZnO and ZnO are added in a total amount of 20 to 30% by weight.

12. In the step (a), the trace metal oxides are CuO, NiO ２ , Co ３ O ４ 8. The method for producing a glass powder for growing algae according to claim 7, wherein one or more of the above are added in a total amount of 5% by weight or less.

13. 8. The method for producing a glass powder for growing algae according to claim 7, wherein in step (b), the melting is carried out at 1,000 to 1,300°C for 30 to 90 minutes.

14. 8. The method of claim 7, wherein in step (b), the glass powder for growing algae has an average diameter of 100 μm or less.

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