Algae cultivation apparatus, algae cultivation method, and cultivation apparatus management system

Abstract

To provide a culture device of algae with a simple structure which is preferable for large-scale culture regardless of an environmental change of weather or the like, excellent photosynthesis efficiency and handleability, and a culture method of algae using the device.SOLUTION: A culture device of algae having: an inner bag body which houses algae to be cultured; and an outer bag body which houses the inner bag body, and has a light reflection layer on a part of a surface opposing the inner bag body and a light transmission / diffusion layer on a surface opposing the light reflection layer, and a culture method of algae for culturing algae by using the culture device of algae.SELECTED DRAWING: Figure 3C

Description

[Technical field]

[0001] The present invention relates to an apparatus and a method for cultivating algae. [Background technology]

[0002] In recent years, major issues have arisen, such as food shortages due to global population growth and rising temperatures due to increased greenhouse gas emissions.

[0003] In response to this problem, attempts have been made to use algae. Since the main components contained in algae vary depending on the type, they can be used as general food ingredients. Furthermore, many algae are capable of fixing carbon dioxide from the atmosphere through photosynthesis. For these reasons, algae have great utility, and attempts have been made to mass-cultivate them in order to make wider use of them.

[0004] Methods under consideration for culturing algae include, for example, a method using a large open outdoor culture tank and a method using a closed bioreactor indoors or outdoors (see, for example, Non-Patent Document 1). Among these, it is ideal to use a large open-air culture tank, especially for mass cultivation. However, in the case of an open-air culture tank, in order to prevent contamination, the culture conditions must be set so that normal bacteria cannot grow, and only algae that can tolerate the culture conditions can be used. In addition, there is a problem that the culture environment changes due to changes in the weather and other environmental factors. be. Also, a culture method has been proposed for mass culturing algae using an outdoor closed bioreactor suspended on the water surface (see, for example, Patent Document 1). However, this method has the problem that mass culturing can result in areas in the bioreactor receiving less light, making it difficult to carry out photosynthesis efficiently. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] Munisb Puri et al. MICROBIOLOGY AUSTRALIA., 2017, 85-88 [Patent documents]

[0006] [Patent Document 1] International Publication No. WO2008 / 153202 [Patent Document 2] JP 2003-168057 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention aims to provide an algae cultivation apparatus that is suitable for mass cultivation regardless of environmental changes such as weather, has excellent photosynthetic efficiency and ease of handling, and has a simple structure, and a method for culturing algae using the same. [Means for solving the problem]

[0008] As a result of intensive research by the inventors to achieve the above-mentioned objective, they have discovered that by adopting a culture device having an inner bag for containing the algae to be cultured, and an outer bag for containing the inner bag and having a light-reflecting layer on a portion of its surface facing the inner bag, and a light-transmitting diffusion layer on a surface facing the light-reflecting layer, it is possible to provide an algae culture device and an algae culture method using the same that are suitable for mass culture regardless of environmental changes such as weather, have excellent photosynthetic efficiency and ease of handling, and have a simple structure.

[0009] The present invention is based on the findings of the present inventors, and the means for solving the above problems are as follows. <1> an inner bag for containing the algae to be cultivated; an outer bag that houses the inner bag and has a light reflecting layer on a portion of a surface facing the inner bag and a light transmitting diffusion layer on a surface facing the light reflecting layer; The present invention relates to an algae culture apparatus comprising: <2> The above <1> The present invention relates to a method for cultivating algae, the method comprising cultivating algae using the algae culture apparatus described above. <3> The above <1> An information storage means for storing information on the algae culture device described in and an extraction means for searching for an unused culture device from the information of the culture device stored in the information storage means. Effect of the Invention

[0010] According to the present invention, it is possible to solve the above-mentioned problems in the conventional art and achieve the above-mentioned objective, and to provide an algae cultivation apparatus and an algae cultivation method using the same, which are suitable for mass cultivation regardless of environmental changes such as weather, have excellent photosynthetic efficiency and ease of handling, and have a simple structure. [Brief description of the drawings]

[0011] [Figure 1A] 2 is a top view showing an example of an inner bag body for the algae culture apparatus of the present invention. FIG. [Figure 1B] FIG. 1B is a diagram showing an example of a cross section taken along line AA' in FIG. 1A. [Figure 1C] FIG. 1C is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. [Figure 1D] FIG. 1D is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. [Figure 1E] FIG. 1E is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. [Figure 1F] FIG. 1F is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. [Figure 1G] FIG. 1G is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. [Figure 1H] FIG. 1H is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. [Figure 1I]FIG. 1I is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. [Figure 1J] FIG. 1J is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. [Figure 2A] FIG. 2A is a top view showing an example of an outer bag body of the algae culture apparatus of the present invention. [Figure 2B] FIG. 2B is a top view showing an example of an outer bag body of the algae culture apparatus of the present invention. [Figure 2C] FIG. 2C is a top view showing an example of an outer bag body of the algae culture apparatus of the present invention. [Figure 3A] FIG. 3A is a diagram showing an example of the algae culture apparatus of the present invention. [Figure 3B] FIG. 3B is a diagram showing another example of the algae culture apparatus of the present invention. [Figure 3C] FIG. 3C is a diagram showing an example of a culture method using the algae culture apparatus of the present invention. [Figure 3D] FIG. 3D is a diagram showing another example of the algae culture apparatus of the present invention. [Figure 3E] FIG. 3E is a diagram showing another example of the algae culture apparatus of the present invention. [Figure 3F] FIG. 3F is a diagram showing another example of a culture method using the algae culture apparatus of the present invention. [Figure 4] FIG. 4 is a block diagram showing an example of the configuration of a culture device management system according to an embodiment of the present invention. [Figure 5A] FIG. 5A is a block diagram showing an example of a hardware configuration of the culture device management system. [Figure 5B] FIG. 5B is a diagram illustrating an example of a functional configuration of the culture device management system. [Figure 6A] FIG. 6A is a diagram showing an example of the culture device DB. [Figure 6B] FIG. 6B is a diagram showing another example of the culture device DB. [Figure 7A] FIG. 7A is a block diagram showing an example of a hardware configuration of a terminal device. [Figure 7B] FIG. 7B is a block diagram showing an example of a functional configuration of a terminal device. [Figure 8] FIG. 8 is a flowchart showing an example of a processing procedure in the culture device management system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (Algae cultivation equipment) The algae cultivation apparatus of the present invention comprises an inner bag for containing the algae to be cultivated, and an outer bag for containing the inner bag and having a light-reflecting layer on a portion of its surface facing the inner bag and a light-transmitting diffusion layer on a surface facing the light-reflecting layer, and further comprises other components as necessary. In the present invention, "culture" means growing an organism in an artificial environment.

[0013] <Inner bag body> The inner bag is a bag that contains the algae to be cultivated.

[0014] The shape of the inner bag is not particularly limited as long as it can be in a sealed state and an unsealed state, and can be appropriately selected according to the purpose. For example, the shape of the inner bag when the maximum area is viewed in a plane can be a square, a rectangle, a diamond, a star, a circle, an ellipse, a tube, etc. Note that the shape of the inner bag is preferably a flat shape in order to ensure the amount of light to be irradiated. If the shape of the inner bag is a flat shape, the surface area irradiated with light to the stored algae can be increased, and the photosynthetic efficiency can be improved.

[0015] The structure of the inner pouch is not particularly limited as long as it is a bag-like structure that can be in a sealed state and an unsealed state, and can be appropriately selected depending on the purpose. For example, a structure with an opening and closing opening, a structure (pouch) in which the peripheral side part is crimped and molded, a structure with a supply or discharge port for supplying or discharging the culture solution, a structure with a supply pipe (a pipe body through which gas or liquid can flow) for supplying at least one of a carbon source, a nitrogen source, a phosphorus source, and other medium components to the inner pouch, a structure with a dividing member that partially or completely divides the storage part that stores the algae into a plurality of storage parts, a structure with a stirring member that stirs the stored algae, etc. A plurality of these structures can be appropriately provided on one inner pouch. In addition, from the viewpoint of convenience of transportation, the structure can also be provided with a portion or member for engaging a handle or a hook, etc. The inner bag may have a structure in which a plurality of sheets of raw resin or the like are stacked together and integrated by heat fusion. In the case of a structure (pouch) in which the peripheral side is crimped and molded, the shape of the storage section in which the algae to be cultured is actually stored is not particularly limited and can be appropriately selected according to the purpose. For example, when the peripheral side has a corner, the corner may have a curved shape or no corner when the storage section is viewed from above. By using such a shape, it is possible to prevent the contents from accumulating at the corners and improve the efficiency of collecting the algae. Furthermore, by using such a structure, it is possible to improve the ease of handling even when performing mass cultivation. At least one of the carbon source, nitrogen source, phosphorus source, and other medium components is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include carbon dioxide gas, mixed gas or exhaust gas containing carbon dioxide, carbonate solution, nitrogen gas, nitrogen-containing liquid, phosphorus-containing liquid, methane fermentation waste liquid, etc. These may be used alone or in combination of two or more. The methane fermentation digestive liquid may be waste liquid discharged after methane fermentation in which organic matter is treated without incineration (see Obayashi Corporation Technical Research Institute Report, No. 78, 2014). The tubular body is not particularly limited and can be appropriately selected depending on the purpose. For example, it may be a flexible tube. The culture medium is not particularly limited and can be appropriately selected depending on the type of algae. Examples of the culture medium include seawater, fresh water, and known algae culture medium.

[0016] The average thickness of the inner bag body is not particularly limited as long as it can ensure the mechanical strength required for handling, and can be appropriately selected depending on the purpose. For example, it is preferably 0.1 mm or more and 0.6 mm or less, and more preferably 0.1 mm or more and 0.2 mm or less.

[0017] The material of the inner bag body is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include resins. The resins are not particularly limited as long as they have a transparency to the extent that light can be transmitted through them, and examples thereof include thermoplastic resins. Examples of the thermoplastic resins include resins with high gas permeability and resins with low gas permeability. The gas permeability is measured in terms of gas permeability (cm) for nitrogen, carbon dioxide, oxygen, and hydrogen, measured according to JIS K 7126-1, Plastic Film and Sheet Gas Permeability Test Method / Differential Pressure Method, at a temperature of 25° C., a humidity of 65%, and an average thickness of 25 μm. 3 / (m 2 The resin having high gas permeability means a resin having a gas permeability of 1,000 (cm 3 ) or more for at least one of nitrogen, carbon dioxide, oxygen, and hydrogen. 3 / (m 2 The term "resin with low gas permeability" refers to a resin with a gas permeability of 1,000 (cm 3 / (m 2 In this specification, a resin having high gas permeability is sometimes referred to as being "gas permeable." Examples of the resin having high gas permeability include polyethylene, polypropylene, soft vinyl chloride, ethylene-vinyl acetate copolymer, polymethylpentene, and polycarbonate. Examples of the resin having low gas permeability include polyester (eg, polyethylene terephthalate (PET)), nylon, polyvinyl alcohol, and fluorine-based resin. Among these, polyethylene, polyester, nylon, and polypropylene are preferred because of their versatility. If the inner bag is made of a material having high gas permeability, when a gas is supplied between the inner bag and the outer bag using a material having low gas permeability as the outer bag described below, the gas can be supplied to the culture solution in the inner bag with high efficiency while preventing the diffusion of the gas.If the inner bag is made of a material having low gas permeability, when a gas is supplied into the inner bag, the gas can be supplied to the culture solution in the inner bag with high efficiency while preventing the diffusion of the gas. The material of the inner bag may be a material that forms a dialysis membrane that can dialyze any component, such as regenerated cellulose, polysulfone, polyethersulfone, polyester polymer alloy, ethylene vinyl alcohol copolymer, polymethyl methacrylate, AN69 membrane (acrylonitrile-sodium methallylsulfonate copolymer), cellulose triacetate, etc. If the material of the inner bag is a material that forms a dialysis membrane that can dialyze any component, it is possible to selectively remove substances that inhibit the cultivation of algae and selectively recover products of algae. The inner bag body is preferably one that has been subjected to a stretching treatment or a biaxial stretching treatment. The inner bag body may be laminated with a heat-sealable film, or may be laminated with another plastic sheet, film, or net for the purpose of reinforcement. The properties of the inner bag are not particularly limited and can be appropriately selected depending on the purpose. For example, the inner bag may have softness and flexibility, or may have rigidity. Furthermore, an appropriate amount of an ultraviolet absorbing agent may be blended into the material of the inner bag, which can prevent or suppress deterioration of the material of the inner bag caused by ultraviolet rays and can suppress excessive exposure of the cultivated algae to ultraviolet rays.

[0018] The size of the inner bag is not particularly limited and can be appropriately selected depending on the purpose, and the design can be appropriately changed from small-scale culture (several mL) to large-scale culture (several hundred million L).

[0019] Furthermore, the method for manufacturing the inner bag body is not particularly limited and can be appropriately selected depending on the purpose. For example, the inner bag body may be manufactured by overlapping the obtained films and crimping all corresponding periphery as described above, or by crimping the three sides that are not folded closed, or by welding and shaping the open end of a tubular film.

[0020] -Algae- The algae is not particularly limited as long as it is capable of photosynthesis, and may be appropriately selected depending on the purpose. Examples of the algae include algae of the phylum Cyanobacteria, algae of the phylum Chlorophyta, algae of the phylum Rhodophyta, algae of the phylum Glaucophyta, algae of the phylum Heterokontophyta, algae of the phylum Dinophyta, algae of the phylum Chlorarachniophyta, algae of the phylum Haptophyta, algae of the phylum Cryptophyta, and algae of the phylum Euglenophyta.

[0021] The other members are not particularly limited and can be appropriately selected depending on the purpose. For example, a sensor for detecting the internal state of the inner bag body can be mentioned. The sensor is not particularly limited as long as it can acquire the culture state of the algae, and can be appropriately selected depending on the purpose. Examples of the sensor include a phosphorus concentration measuring sensor, a nitrogen concentration measuring sensor, a carbon dioxide concentration measuring sensor, a metal ion concentration measuring sensor, a sodium chloride concentration measuring sensor, a turbidity meter (algae concentration measuring device), a light meter, a thermometer, a pH sensor, and the like.

[0022] The inner pouch will now be described in more detail with reference to the drawings. 1A to 1J are diagrams showing specific examples of the inner bag of the algae culture apparatus of the present invention. Fig. 1A is a top view showing an example of the inner bag of the algae culture apparatus of the present invention. As shown in Fig. 1A, the inner bag 10 in this example has an open / close valve 11, a compression molded part 12, a first tubular body 13, a second tubular body 14, and a storage part 15. There are no particular limitations on the positions at which the open / close valve 11, the first tubular body 13, and the second tubular body 14 are installed, and they can be appropriately selected depending on the purpose, but from the viewpoint of simplifying the structure of the positions of the opening and closing openings provided in the outer bag 20 for connecting the contents of the inner bag 10 to an external device that supplies and discharges gas or liquid, it is preferable to install these structures close to each other. The pressure-bonded portion 12 is formed by fusion-bonding (welding) the inner bag body 10 using an external heat source to integrate the welded inner bag body 10. There is no particular limitation on the heat source and it can be appropriately selected depending on the purpose, and examples of the heat source include a sealer.

[0023] Fig. 1B is a diagram showing an example of a cross section taken along the line A-A' in Fig. 1A. As shown in Fig. 1B, the pressure-bonded molded portion 12 has a structure in which the peripheral portion of the inner bag body 10 is pressure-bonded and integrated. With such a structure, leakage of the contents can be easily prevented, and handling can be improved.

[0024] FIG. 1C is a top view showing another example of the inner bag body of the algae culture device of the present invention. FIG. 1C shows an example of a structure in which the corners of the storage section 15 are rounded to change the curvature. This structure can prevent the contents from remaining at the corners when the algae are collected from the storage section 15, and can improve the handling with a simple structure. It is not necessary to apply such a shape to all corners, and it can be appropriately selected according to the purpose. For example, as shown in FIG. 1C to FIG. 1E, this structure can be applied to one corner or two corners on the same side. It is also possible to apply the shape of the inner bag body 10 to the shape of the storage section as shown in FIG. 1D and FIG. 1E, or it may not be adapted to the shape of the storage section.

[0025] FIG. 1F is a top view showing another example of the inner bag of the algae culture device of the present invention. As shown in FIG. 1F, a partition wall 16 is provided inside the inner bag 10 to separate the storage section 15. The partition wall 16 can be obtained by crimping any part of the inner bag 10 in the same manner as the crimping section 12. By providing the partition wall 16 as in FIG. 1F, excessive stirring of the stored algae can be suppressed when the storage section 15 of the inner bag 10 is filled with algae and then transported. By suppressing excessive stirring, damage to the algae can be suppressed. In addition, by adopting such a structure, in the case of a large-sized algae culture device, when the algae are filled in the inner bag and then transported to a place where they are cultured, the movement of the filled algae culture solution can be suppressed, thereby preventing dangers such as the transport vehicle becoming unable to control its operation.

[0026] Fig. 1G is a top view showing another example of the inner bag of the algae culture apparatus of the present invention. Fig. 1G shows a structure in which the storage sections of the inner bag 10 are completely separated by the partition wall 16 shown in Fig. 1F, and each storage section is provided with an opening 11, a first pipe, and a second pipe. With this structure, even if the algae culture apparatus is enlarged, a sufficient amount of culture solution can be supplied to the contents evenly.

[0027] Fig. 1H is a top view showing another example of the inner bag body of the algae culture apparatus of the present invention. Fig. 1H has a structure in which a sensor 17 is installed inside the inner bag body 10 in Fig. 1A. There are no particular limitations on the shape, structure, material, size, and position of the sensor 17, and they can be appropriately selected depending on the purpose. By installing a sensor, the state of the culture environment can be constantly grasped and appropriate measures can be taken quickly.

[0028] FIG. 1I is a top view showing another example of the inner bag body of the algae culture device of the present invention. FIG. 1I has a structure in which an agitation member 18 is installed inside the inner bag body 10 in FIG. 1A. There are no particular limitations on the shape, structure, material, size, and position of the agitation member 18, and they can be appropriately selected according to the purpose. By installing the agitation member, a sufficient amount of culture solution, etc. can be supplied to the contents evenly. In addition, by appropriately stirring, the culture environment can be kept constant evenly even when performing mass culture.

[0029] Fig. 1J is a top view showing another example of the inner bag according to the algae culture device of the present invention. Fig. 1J has a sealing member 19 that integrates the open / close valve 11, the first tube 13, and the second tube 14 in Fig. 1A. Figs. 1A to 1I show an example in which the open / close valve 11, the first tube 13, and the second tube 14 are directly installed in the inner bag 10, but since the sealing member 19 integrates the open / close valve 11, the first tube 13, and the second tube 14, even if the inner bag 10 is damaged, it can be easily replaced by simply removing the sealing member 19 from the inner bag 10 and attaching the sealing member 19 to a new inner bag 10. In addition, by installing the sealing member 19, it is not necessary to perform special processing on the inner bag 10, and the inner bag 10 can be used by simply installing the sealing member 19 on the inner bag 10 having an opening. The shape, structure, material, size, and position of the sealing member 19 are not particularly limited as long as they can integrate the opening / closing plug 11, the first tubular body 13, and the second tubular body 14, and seal the inner bag body 10, and can be selected appropriately depending on the purpose.

[0030] The structures shown in FIGS. 1A to 1J may be used alone or in appropriate combination.

[0031] <Outer bag body> The outer bag accommodates the inner bag, and has a light reflecting layer on a portion of a surface facing the inner bag, and a light transmitting diffusion layer on a surface facing the light reflecting layer. The outer bag is provided to house the inner bag therein and thereby prevent the inner bag from being damaged due to direct contact with the outside world.

[0032] The shape of the outer pouch is not particularly limited as long as it can be in a sealed state and an unsealed state, and can be appropriately selected depending on the shape of the inner pouch.

[0033] The structure of the outer bag body is not particularly limited as long as it is a bag-like structure that can be in a sealed state and an open state, and can be appropriately selected depending on the purpose. For example, a structure having an opening and closing opening through which the inner bag body can be inserted and removed, and a connecting member that connects one outer bag body to another outer bag body can be mentioned. The size of the opening is not particularly limited as long as it allows the inner bag body to be inserted and removed, and can be appropriately selected depending on the purpose. The opening may have an adapter that allows a member that connects the inner bag to the outside to be taken out while keeping the outer bag sealed. The adapter is not particularly limited, and examples thereof include a member that conforms to the shape of the member that connects the inner bag to the outside and comes into close contact with it. The connecting member is a member that connects multiple independent algae culture devices. By having the connecting member, it is possible to manage multiple algae culture devices in an appropriate arrangement, and when managing multiple algae culture devices in a specific area, it is possible to prevent the devices from overlapping and reducing the efficiency of light irradiation. There are no particular limitations on the shape, structure, material, and size of the connecting member, and they can be appropriately selected depending on the purpose. The outer bag may have a structure in which a plurality of sheets of raw resin or the like are stacked together and integrated by heat fusion.

[0034] The average thickness of the outer bag body is not particularly limited as long as it can ensure the mechanical strength required for handling, and can be appropriately selected depending on the purpose. For example, it is preferably 0.1 mm or more and 0.6 mm or less, and more preferably 0.1 mm or more and 0.2 mm or less.

[0035] The material of the outer bag body is not particularly limited and can be appropriately selected depending on the purpose, and the same material as that of the inner bag body can be used.

[0036] The size of the outer bag body is not particularly limited as long as it can accommodate the inner bag body, and can be appropriately selected depending on the purpose.

[0037] The manufacturing method of the outer bag body is not particularly limited and can be appropriately selected depending on the purpose. For example, the obtained films can be overlapped and all corresponding edges can be pressure-molded as described above, or the three sides that are not folded closed can be pressure-molded, or the open end of a tubular film can be welded and molded.

[0038] <<Light transmitting diffusion layer>> The light transmitting and diffusing layer transmits and diffuses the light irradiated to the outer bag body, allowing the light to enter the inner bag body that contains the light. The light-transmitting diffusion layer may be a single layer or a multilayer, and can be appropriately selected depending on the purpose. When the light-transmitting diffusion layer is a single layer, it may be simply called a light-transmitting diffusion film. By providing the light-transmitting diffusion layer, the irradiated light can be efficiently directed to the algae in the inner bag body even when there are environmental changes such as weather conditions that cause the illuminance to decrease depending on the season.

[0039] The position of the light-transmitting diffusion layer in the outer bag is not particularly limited as long as it is in a position that includes the surface facing the light-reflecting layer described later, and may be, for example, on the side of the outer bag that has the inner bag (inside), or on the side of the outer bag that does not have the inner bag (outside). Since the light-transmitting diffusion layer is located at a position including a surface facing the light-reflecting layer, the light incident and diffused from the light-transmitting diffusion layer can be efficiently irradiated to the algae contained in the inner bag. Also, since the light-transmitting diffusion layer is located at a position including a surface facing the light-reflecting layer, the light that has passed through the inner bag is efficiently reflected by the light-reflecting layer, so that the light can be efficiently irradiated to the algae present at the bottom of the inner bag.

[0040] The shape, structure and size of the light transmitting and diffusing layer are not particularly limited and can be appropriately selected depending on the purpose.

[0041] The material for the light transmitting and diffusing layer is not particularly limited and may be appropriately selected depending on the purpose. Examples of the material include a resin film containing hollow particles capable of transmitting and diffusing light, and a resin film having a roughened surface.

[0042] <<Light reflective layer>> The light reflecting layer is a layer that is provided on a part of the surface facing the inner bag body and is capable of reflecting light. The light reflecting layer may be a single layer or multiple layers, and can be appropriately selected depending on the purpose. When the light reflecting layer is a single layer, it may be simply called a light reflecting film. By providing the light reflecting layer, even if there is a change in the environment, such as the weather, that reduces the illuminance, the irradiated light can be efficiently directed to the algae in the inner bag body.

[0043] The surface facing the inner bag body is not particularly limited as long as it is the surface of the outer bag body that faces the inner bag body, and may be, for example, the side of the outer bag body that has the inner bag body (inner side), or the side of the outer bag body that does not have the inner bag body (outer side).

[0044] The position of the part of the surface of the outer bag facing the inner bag is not particularly limited as long as it is a position that does not block light incident on the inner bag, and can be appropriately selected depending on the purpose. The light reflecting layer may be formed as an integral layer (film) on the surface of the outer bag facing the inner bag, or may be formed as an intermittent layer (film).

[0045] The shape, structure and size of the light reflecting layer are not particularly limited and can be appropriately selected depending on the purpose.

[0046] The material for the light reflecting layer is not particularly limited and can be appropriately selected depending on the purpose. Examples of the material include metals such as aluminum, and slurries containing metals and light scattering particles (such as transparent hollow particles).

[0047] The side of the outer bag on which the light-transmitting diffusion layer is formed may have a smaller specific gravity than the side on which the light-reflecting layer is formed. In this way, when the culture device of the present invention is floated on the water surface, light can always pass through the side on which the light-transmitting diffusion layer is formed, enter the inner bag, and be reflected by the light-reflecting layer, so that light can be efficiently irradiated to the algae. There are no particular limitations on the method for making the side of the outer bag body on which the light-transmitting diffusion layer is formed smaller in specific gravity than the side on which the light-reflecting layer is formed, and the method can be appropriately selected depending on the purpose. For example, a method of placing a weight on the side of the outer bag body on which the light-reflecting layer is formed, or a method of using a material for the light-reflecting layer having a higher specific gravity than the light-diffusing layer can be mentioned. In addition, when the culture device of the present invention is installed on the ground, it is preferable to install the light-transmitting diffusion layer closer to the light source than the light-reflecting layer, so that light always passes through the side where the light-transmitting diffusion layer is formed, enters the inner bag body, and is reflected by the light-reflecting layer, so that light can be efficiently irradiated to the algae.

[0048] At least one of a light-transmitting gas, liquid, and solid is present between the inner bag and the outer bag. The gas is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include air, nitrogen gas, carbon dioxide gas, mixed gas, etc. In addition, exhaust gas (mixed gas containing high concentration of carbon dioxide) from power plants, waste treatment facilities, etc. may be used. The liquid is not particularly limited and can be selected according to the purpose. For example, seawater, river water, fresh water, etc. can be used. From the viewpoint of suppressing or preventing the proliferation of various bacteria, however, growth-inhibiting aqueous media such as acidic water, alkaline water, EDTA-containing water, etc., and sterilized aqueous media are preferred. The solid is not particularly limited and can be appropriately selected depending on the purpose. Examples of the solid include gels and particles. By providing at least one of the gas, liquid, and solid between the inner bag and the outer bag, the liquid containing the algae contained in the inner bag can be prevented from being heated by the energy of the light source through the thermal conduction of at least one of the gas, liquid, and solid. Also, the outer bag and the inner bag can be prevented from rubbing against each other and being worn down by waves and the like.

[0049] An intermediate pouch is provided between the inner pouch and the outer pouch for housing the inner pouch. The intermediate bag is preferably made of a material with low gas permeability, so that the intermediate bag can receive and collect gas released by the algae contained in the inner bag. By providing the intermediate bag, the heat insulating effect can be improved, so that the temperature inside the inner bag can be kept stable. Also, by providing the intermediate bag and using or storing an object with a low specific gravity in the intermediate bag, the algae culture device is less likely to turn over from the installed state, and the efficiency of algae culture can be improved. The number of the intermediate bags is not particularly limited and can be appropriately selected depending on the purpose. There are no particular limitations on the shape, structure and size of the intermediate bag, so long as it can accommodate the inner bag, and the shape, structure and size can be appropriately selected depending on the purpose. The material of the intermediate bag is not particularly limited as long as it has high gas-tightness, and can be appropriately selected depending on the purpose.

[0050] <Other materials> The other members are not particularly limited and can be appropriately selected depending on the purpose. For example, a selective light transmitting layer can be mentioned.

[0051] <<Selective light transmission layer>> The selective light transmitting layer is a layer that selectively transmits at least any one of light having a wavelength of 400 nm to 500 nm and light having a wavelength of 600 nm to 700 nm. Chlorophyll, a photosynthetic pigment found in photosynthetic organisms, has an absorption peak at light with wavelengths of at least one of 400 to 500 nm and 600 to 700 nm. Therefore, by providing the selectively light-transmitting film, it is possible to suppress the temperature rise inside the culture device caused by infrared light and to avoid damage to the algae caused by ultraviolet light, thereby making the photosynthesis of the algae more efficient. The selectively light-transmitting layer may be provided on at least one of the inner bag, the outer bag, and the intermediate bag, or at least one of the inner bag, the outer bag, and the intermediate bag may be manufactured using a material capable of selectively transmitting light. The shape, structure, material and size of the selective light transmitting layer are not particularly limited and can be appropriately selected depending on the purpose. The position of the selective light transmitting layer is not particularly limited as long as it is disposed on the same side as the surface having the light transmitting diffusion layer, and can be appropriately selected depending on the purpose.

[0052] The outer pouch will now be described in more detail with reference to the drawings. 2A to 2C are diagrams showing an example of an outer bag body of the algae culture apparatus of the present invention. Fig. 2A is a top view showing an example of an outer bag for the algae culture apparatus of the present invention. As shown in Fig. 2A, the outer bag 20 in this example has an opening / closing opening 21, a light reflecting layer 22 (not shown), and a light transmitting diffusion layer 23 (not shown). The opening / closing opening 21 may be appropriately positioned and sized according to the size of the inner bag 10 to be housed. Figures 2B and 2C are diagrams showing an example of a cross section taken along line B-B' in Figure 2A. As shown in Figures 2B and 2C, a light reflecting layer 22 is provided on the inside of the outer bag body 20. Note that, although Figure 2B shows an example in which the light reflecting layer 22 is formed only in a partial area and does not come into contact with the light transmitting diffusion layer 23 described later, as shown in Figure 2C, the surface of the outer bag body may be covered with the light reflecting layer 22 and the light transmitting diffusion layer 23 so as to come into contact with the light transmitting diffusion layer 23.

[0053] Next, the algae culture device of the present invention will be described in detail with reference to the drawings. Note that these embodiments are examples included in the aspects of the present invention, and the present invention is not limited to these embodiments.

[0054] FIG. 3A is a top view showing an example of an algae culture apparatus. As shown in FIG. 3A, the algae culture apparatus contains the inner bag 10 shown in FIG. 1A in the outer bag 20 shown in FIG. 2A. FIG. 3B is a view showing an example of a cross section taken along the line C-C' in FIG. 3A. FIG. 3C is a view showing an example of algae culture using the algae culture apparatus shown in FIG. 3A. In the algae culture apparatus 100 shown in FIG. 3C, light 201 from a light source 200 is irradiated to the culture solution 41 containing algae contained in the inner bag 10, and diffused light 202 is irradiated through the light-transmitting diffusion layer 23 of the outer bag 20. In addition, the diffused light 202 transmitted through the culture solution 41 transmits through the inner bag 10, and then irradiates the inner bag 10 with reflected light 203 by the light-reflecting layer 22 provided on the opposite surface of the light-transmitting diffusion layer 23 of the outer bag 20. In this way, the algae cultivation device 100 of the present invention has a light-transmitting diffusion layer 23 on the side of the outer bag body 20 closer to the light source 200, and a light-reflecting layer 22 on the surface facing the light-transmitting diffusion layer 23, so that the light 201 from the light source 200 can be efficiently irradiated to the stored algae regardless of the positional relationship between the cultivation device and the light source.

[0055] FIG. 3D is a top view showing another example of the algae culture apparatus, and FIG. 3E is a view showing an example of the C-C' cross section in FIG. 3D. As shown in FIG. 3D and FIG. 3E, the algae culture apparatus is the same as the algae culture apparatus shown in FIG. 3A to FIG. 3C, except that an intermediate bag 30 is provided between the inner bag 10 and the outer bag 20 in the algae culture apparatus shown in FIG. 3A to FIG. 3C. FIG. 3F is a view showing an example of the case where algae is cultured using the algae culture apparatus shown in FIG. 3E. As shown in FIG. 3E and FIG. 3F, the algae culture apparatus having the intermediate bag 30 can efficiently collect the gas produced by the algae in the inner bag 10 by using a material that is difficult for gas to permeate as the intermediate bag 30.

[0056] (Method of culturing algae) The method for cultivating algae of the present invention comprises cultivating algae using the algae culture apparatus of the present invention, and further includes other steps as necessary. In the method for cultivating algae of the present invention, the algae and a culture solution are contained in the algae cultivating device of the present invention, and the device is floated on water or placed on land to cultivate the algae. In the cultivation of algae, carbon dioxide gas, mixed gas or exhaust gas containing carbon dioxide, carbonate solution, nitrogen gas, nitrogen-containing liquid, phosphorus-containing liquid, methane fermentation waste liquid, etc. are supplied as necessary. In the cultivation of algae, gas can be supplied by passing water through the gas, bubbling, etc. As a method for passing water through the gas, for example, a deoxygenation device manufactured by Kyowa Co., Ltd. can be used. There is no particular limitation on the method for supplying liquid in the cultivation of algae, and it can be appropriately selected depending on the purpose.

[0057] (Culture Equipment Management System) The culture device management system of the present invention includes: an information storage means for storing information on the algae culture device of the present invention; and an extraction means for searching for an unused culture device from the information on the culture device stored in the information storage means, and further comprising other means as required.

[0058] Since the program of the culture device management system of the present invention is realized as the culture device management system of the present invention by using a computer or the like as a hardware resource, the details of the program of the culture device management system of the present invention will also be clarified through the explanation of the culture device management system of the present invention. In addition, each means in the culture device management system of the present invention may be integrated or may be separate (separate from each other). When each means is separate, it is preferable to connect each of these means using a network such as an intranet or the Internet.

[0059] Conventional technology is known that can simply manage heavy machinery such as agricultural equipment and lend out unused equipment (see, for example, Patent Document 2), but does not manage user information for equipment used in mass cultivation of algae, which requires careful consideration of usage conditions. Therefore, the inventors discovered that by accumulating information about the equipment used for mass cultivation of algae and creating a database, users who want to use (rent) the equipment can rent equipment that can be used under appropriate cultivation conditions similar to their own, and conversely, owners of algae cultivation equipment can collect usage fees by lending out unused cultivation equipment. Furthermore, it has been found that the culture equipment management system of the present invention tracks and manages the management status of the equipment even after manufacture and sale, and therefore makes it possible to obtain information such as, for example, management of the number of units sold, optimization of promotional timing, management of maintenance timing, collection of equipment information such as damage, and the owner's culture know-how and the owner's culture track record.

[0060] <Information storage means> The information storage means is a means for storing information about the algae culture apparatus of the present invention. The information storage means is not particularly limited as long as it can realize the above functions, and can be appropriately selected according to the purpose, and can be realized, for example, by using a processing device (CPU, etc.) and a storage device of a known computer, server device, mobile terminal, etc. Also, the information storage means may be a part of the function realized by a processing device (CPU, etc.) in a mobile terminal (tablet terminal, smartphone, etc.) owned by a user who uses the present invention.

[0061] - Information on algae cultivation equipment - The information on the algae culture equipment is not particularly limited and can be selected appropriately depending on the purpose. Examples include the name and address of the owner of the culture equipment, information about the culture equipment (type, year, model, etc.), whether it is available for rental, the type of algae cultured, culture conditions, and culture history (period of use of the culture equipment, production volume).

[0062] -Algae- The algae is not particularly limited as long as it is capable of photosynthesis, and may be appropriately selected depending on the purpose. Examples of the algae include algae of the phylum Cyanobacteria, algae of the phylum Chlorophyta, algae of the phylum Rhodophyta, algae of the phylum Glaucophyta, algae of the phylum Heterokontophyta, algae of the phylum Dinophyta, algae of the phylum Chlorarachniophyta, algae of the phylum Haptophyta, algae of the phylum Cryptophyta, and algae of the phylum Euglenophyta.

[0063] The information storage means is not particularly limited and can be appropriately selected depending on the purpose. Examples of the information storage means include recording media such as a hard disk, a CD-ROM (Compact Disc-Read Only Memory), a DVD-ROM (Digital Versatile Disc-ROM), an MO (Magneto-Optical) disk, and a USB (Universal Serial Bus) memory. Moreover, it may be an external storage area (another computer, etc.) accessible from a computer via an information and communication network, or a storage device on a cloud server.

[0064] <Extraction means> The extraction means is a means for extracting the culture apparatus that is not in use from the information on the culture apparatus stored in the information storage means. There is no particular limitation on the method by which the extraction means searches for unused culture devices from the information on the culture devices stored in the information storage means, and the method can be selected appropriately depending on the purpose, for example, by extracting information on devices whose usage status in the information storage means is set to unused. The extraction means may be a processing device (CPU, etc.) and a storage device of a known computer, server device, mobile terminal, etc. The extraction means may be a part of a function realized by a processing device (CPU, etc.) in a mobile terminal (tablet terminal, smartphone, etc.) owned by a user who uses the present invention.

[0065] The extraction means receives information about the culture device, compares the received information about the culture device with information about the culture device stored in the information storage means, and extracts information about the culture device stored in an unused information storage means. The received information on the culture apparatus may include, for example, at least one piece of information on the algae culture apparatus stored in the information storage means.

[0066] The method of receiving information about the culture device is not particularly limited and can be selected appropriately depending on the purpose. For example, there is a method in which information about the culture device is input from a terminal device and the specific information is received via at least one of wired and wireless communication. The terminal device is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include a smartphone, a tablet, a notebook computer, etc. In the present invention, a terminal owned by a user (sometimes referred to as a user) who uses the present invention can be used as an example of a means for receiving information about the culture device, and the information about the culture device acquired by the extraction means in the culture device management system of the present invention can be appropriately acquired by the terminal owned by the user.

[0067] The program for the culture device management system of the present invention can be created using various programming languages ​​depending on the configuration of the computer used and the type and version of the operating system.

[0068] The program of the culture device management system of the present invention may be recorded on a recording medium such as a hard disk, or on a recording medium such as a CD-ROM (Compact Disc-Read Only Memory), a DVD-ROM (Digital Versatile Disc-ROM), an MO (Magneto-Optical) disk, or a USB (Universal Serial Bus) memory. The program of the culture device management system of the present invention may be recorded in an external storage area (such as another computer) accessible from the computer via an information and communication network. In this case, the program of the culture device management system of the present invention recorded in the external storage area can be installed in a recording medium from the external storage area via the information and communication network as necessary and used. The program of the culture device management system of the present invention may be divided for each process and recorded on a plurality of recording media.

[0069] The processing according to the program of the culture equipment management system of the present invention can be executed by a computer having a control unit that constitutes the culture equipment management system.

[0070] Hereinafter, one embodiment of the present invention will be described, but the present invention is not limited to this embodiment in any way. The hardware configuration and the functional configuration of the culture device management system will be described below.

[0071] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0072] <Hardware configuration of the culture equipment management system> FIG. 4 is a block diagram showing an example of the configuration of the culture device management system 1 according to an embodiment of the present invention. As shown in FIG. 4, the culture device management system 1 has an extraction means 1000, and input means 2001a, input means 2001b, input means 2001c, . . . mounted on a terminal device 2000A, a terminal device 2000B, a terminal device 2000C, . The extraction means 1000 is communicably connected to an input means 2001a, an input means 2001b, an input means 2001c, . . . via a network 3000.

[0073] Since the input means 2001a, the input means 2001b, the input means 2001c, . . . have the same device configuration, they will be collectively referred to as "input means 2001" below and described. Furthermore, when there is no need to distinguish between the terminal device 2000A, the terminal device 2000B, the terminal device 2000C, . . . , they may be simply referred to as "terminal device 2000."

[0074] FIG. 5A is a block diagram showing an example of a hardware configuration of the culture device management system 1. As shown in FIG. 5A, the culture device management system 1 has a CPU (Central Processing Unit) 1001, a main memory device 1002, an auxiliary memory device 1003, a communication interface 1004, an input device 1005a, and an output device 1006a, and is connected to a terminal device 2000 having an input device 1005b and an output device 1006b via a network 3000. These components are connected to each other via a bus 1007. The CPU 1001 is a processing device that performs various controls and calculations. The CPU 1001 realizes various functions by executing an OS (Operating System) and programs stored in the main memory device 1002, etc. That is, in the present invention, the CPU 1001 functions as a control unit 1300 of the culture device management system 1 by executing a determination program. Moreover, the CPU 1001 controls the operation of the entire culture device management system 1. In the present invention, the device that controls the operation of the entire culture device management system 1 is the CPU 1001, but is not limited thereto, and may be, for example, an FPGA (Field Programmable Gate Array). The main memory device 1002 stores various programs and also stores data and the like required to execute the various programs. The main memory device 1002 includes, for example, at least one of a ROM and a RAM (Random Access Memory). The ROM stores various programs such as the BIOS (Basic Input / Output System) and the judgment program of the present invention. There is no particular limitation on the ROM, and it can be appropriately selected according to the purpose. Examples of the ROM include mask ROM and PROM (Programmable ROM). The RAM functions as a working area in which various programs stored in the ROM, auxiliary storage device, etc. are deployed when executed by the CPU 101. There are no particular limitations on the RAM, and it can be appropriately selected depending on the purpose. Examples of the RAM include DRAM (Dynamic Random Access Memory) and SRAM (Static Random Access Memory).

[0075] The auxiliary storage device 1003 is not particularly limited as long as it can store various information, and can be appropriately selected according to the purpose, and examples of the auxiliary storage device 1003 include a solid state drive (SSD), a hard disk drive (HDD), etc. The auxiliary storage device 1003 may also be a portable storage device such as a CD drive, a DVD drive, or a BD (Blu-ray (registered trademark) Disc) drive.

[0076] There are no particular limitations on the communication interface 1004, and any known interface may be used as appropriate, such as a wireless or wired communication device.

[0077] The input device 1005a is not particularly limited as long as it can accept various requests and information input to the culture device management system 1, and any known device can be used as appropriate, such as a keyboard, a mouse, a touch panel, a microphone, etc. In addition, when the input device 1005a is a touch panel (touch display), the input device 1005a can also serve as the output device 1006a.

[0078] The output device 1006a is not particularly limited and may be any known device, such as a display. The display used in the output device 1006a is not particularly limited and may be any known device, such as a liquid crystal display or an organic EL display.

[0079] The terminal device 2000 has an input device 1005b and an output device 1006b. There is no particular limit to the terminal device as long as it has the input device 1005b, and it can be appropriately selected depending on the purpose, and for example, a smartphone can be used. The terminal device 2000 also has a display screen as the output device 1006b. There is no particular limit to the display screen, and it can be appropriately selected depending on the purpose, and for example, a liquid crystal display, an organic EL display, and the like can be used.

[0080] The components from the CPU 1001 to the output device 1006a in the culture device management system 1 may be part of a cloud, which is a group of computers on a network.

[0081] <Functional configuration of the culture equipment management system> FIG. 5B is a diagram showing an example of a functional configuration of the culture device management system 1. As shown in FIG. 5B, the culture device management system 1 includes a communication unit 1100, a storage unit 1200, a control unit 1300, an input unit 1400, and an output unit 1500. In the culture device management system 1, for example, the function of the communication unit 1100 is realized by the communication interface 1004, the function of the storage unit 1200 is realized by the main storage unit 1002 and the auxiliary storage unit 1003, the function of the control unit 1300 is realized by the CPU 1001 and the main storage unit 1002, the function of the input unit 1400 is realized by the input devices 1005a and 1005b, and the function of the output unit 1500 is realized by the output devices 1006a and 1006b.

[0082] The communication unit 1100, for example, transmits and receives various types of data to and from an external device (for example, a cloud server, etc.).

[0083] The storage unit 1200 stores, for example, various programs and has a culture device DB 1201.

[0084] FIG. 6A is a diagram showing an example of culture device data stored in the culture device DB 1201. As shown in FIG. 6A, the culture device DB121 includes data items such as "culture device number," "owner," "address," "device information," "rental availability," etc. The "device information" includes data items such as the device's "type," "model," "year," "purchase date," and "(last) maintenance time." FIG. 6B is a diagram showing another example of the culture device data stored in the culture device DB 1201. As shown in FIG. 6B, the culture device DB121 includes data items such as "culture device number," "type of algae (that was cultured)," "culture conditions," and "culture performance." The "culture conditions" include data items such as "type of culture medium," "culture temperature," and "culture protocol." The "culture performance" includes data items such as "period of use (of the device)," and "total production volume (of algae)."

[0085] The items of culture equipment data stored in the culture equipment DB1201 include data items such as "owner," "type of algae (being cultured)," "culture conditions," and "culture history," so that a user who wishes to use (rent) the equipment can rent an equipment that can be used under the culture conditions appropriate to the user's own use. In addition, by including data items such as "Purchase Date" and "(Last) Maintenance Time" of the device as "Device Information" in the items of culture device data stored in the culture device DB1201, the state of the culture device sold by the device manufacturer can be tracked, managed, and understood, and not only new device purchase information and regular maintenance but also unexpected repairs can be handled promptly. In addition, it is possible to obtain information such as the number of units sold, optimization of sales promotion timing, management of maintenance timing, collection of machine information such as damage, the owner's culture know-how, and the owner's culture track record.

[0086] The control unit 1300 executes, for example, various programs stored in the storage unit 1200, and controls the operation of the entire culture device management system 1. The control unit 1300 includes an extraction unit 1301.

[0087] The control unit 1300 accepts data of the information of the culture device received by the communication unit 1100 . The extraction unit 1301 collates the received culture device information data with the culture device data stored in the culture device DB 1201, and extracts culture device information including data items that match the received culture device information.

[0088] The input unit 1400 receives, for example, various instructions for the culture device management system 1.

[0089] The output unit 1500 outputs, for example, the result extracted by the extraction unit 1301 to the output device 1006 .

[0090] In the explanation of the hardware configuration and the functional configuration of the culture device management system, an example in which each element is integrated is shown, but the present invention is not limited to this, and for example, some elements may be independent and each may be connected to a network via a communication interface. More specifically, for example, the culture device DB1201 may be stored in an area on a cloud server.

[0091] Next, the hardware configuration and the functional configuration of the terminal device 2000 will be described.

[0092] The terminal device 2000 is a device used by a user or the like to transmit specific information of the object to be examined to the culture device management system 1.

[0093] <Hardware configuration of terminal device> FIG. 7A is a block diagram showing an example of a hardware configuration of the terminal device 2000. As shown in FIG. As shown in FIG. 7A, the hardware configuration of the terminal device 2000 is similar to that of the culture device management system 1 in FIG. 5A, except that the terminal device 2000 is not shown via the network 3000, and therefore the description will be omitted.

[0094] <Functional configuration of terminal device> FIG. 7B is a block diagram showing an example of the functional configuration of the terminal device 2000. As shown in FIG. As shown in FIG. 7B, the functional configuration of the terminal device 2000 includes a communication unit 2100, a storage unit 2200, a control unit 2300, an input unit 2400, and an output unit 2500.

[0095] Based on an instruction from the control unit 2300, the communication unit 2100 transmits the received information on the culture device to the culture device management system 1 using the communication interface 2004. Furthermore, the communication unit 2100 receives information from the culture device management system 1. The storage unit 2200 stores the information received from the culture device management system 1 in the auxiliary storage device 2003 . Moreover, the control unit 2300 controls the transmission and reception of information to and from the culture device management system 1.

[0096] Next, the processing procedure of the program of the culture device management system of the present invention will be described below. Fig. 8 is a flow chart showing an example of the processing procedure of the program of the culture device management system in the control unit 1300 of the culture device management system 1.

[0097] In step S101, the control unit 1300 of the culture device management system 1 receives information about the culture device from the communication unit 1100, and shifts the process to S102. In step S102, the control unit 1300 of the culture device management system 1 collates the received information on the culture device with information on the culture device stored in the culture device DB 1201 in the information storage means, and shifts the process to S103. In step S103, the extraction unit 1301 of the control unit 1300 extracts information on the culture device that includes data items matching the received information on the culture device, and moves the process to S104. In step S104, the control unit 1300 of the culture device management system 1 causes the output device to present the extracted information on the culture device, and ends this process.

[0098] As described above, by using the culture equipment management system of the present invention, a user who wants to use an equipment can rent an equipment that can be used under the culture conditions appropriate to the user's own use. Conversely, if an owner of an algae culture equipment has an unused culture equipment, he or she can collect a usage fee by renting it out. In addition, the culture equipment management system of the present invention tracks and manages the management status of the equipment even after manufacture and sale, and can obtain information such as, for example, management of the number of units sold, optimization of promotional timing, management of maintenance timing, collection of equipment information such as damage, the owner's culture know-how, and the owner's culture track record.

[0099] Examples of aspects of the present invention include the following. <1> an inner bag for containing the algae to be cultivated; an outer bag that houses the inner bag and has a light reflecting layer on a portion of a surface facing the inner bag and a light transmitting diffusion layer on a surface facing the light reflecting layer; The present invention relates to an algae culture apparatus comprising: <2> At least one of a light-transmitting gas, a liquid, and a solid is present between the inner bag body and the outer bag body. <1> 2 is a culturing apparatus for algae according to the present invention. <3> In the outer bag body, the side having the light transmitting diffusion layer has a smaller specific gravity than the side having the light reflecting layer. <1> from <2> 1. The algae culture apparatus according to claim 1, <4> The inner bag has a gas permeability (cm) to at least one of nitrogen, carbon dioxide, oxygen, and hydrogen, measured according to JIS K 7126-1 under conditions of 25°C, relative humidity of 65%, and an average thickness of the inner bag of 25 μm. 3 / (m 2 ·24h·atm)) is 1,000(cm 3 / (m 2 ·24h·atm)) or more, <1> from <3> 1. The algae culture apparatus according to claim 1, <5> The inner bag is provided between the inner bag and the outer bag, and an intermediate bag is provided between the inner bag and the outer bag to accommodate the inner bag. <1> from <4> The present invention relates to an algae culture apparatus according to any one of the above. <6> The device further comprises a tube inserted into the inner bag through which a fluid can flow, and a sensor for detecting an internal state of the inner bag. <1> from <5> 1. The algae culture apparatus according to claim 1, <7> At least one of the inner bag body, the outer bag body, and the intermediate bag body has a selective light transmitting layer that selectively transmits at least one of light having a wavelength of 400 nm to 500 nm and light having a wavelength of 600 nm to 700 nm. <5> from <6> The present invention relates to an algae culture apparatus according to any one of the above. <8> The above <1> from <7> The present invention relates to a method for cultivating algae, the method comprising cultivating algae using the algae culture device according to any one of the above items. <9> The light-transmitting diffusion layer is disposed closer to a light source than the light-reflecting layer. <8> 2. A method for culturing algae according to claim 1. <10> The above <1> from <7> An information storage means for storing information on the algae culture device according to any one of the above items; and an extraction means for searching for an unused culture device from the information of the culture device stored in the information storage means.

[0100] The above <1> from <7> The algae culture apparatus according to any one of the above. <8> from <9> The method for culturing algae according to any one of the above, <10> According to the culture device management system described above, the above-mentioned problems in the prior art can be solved and the object of the present invention can be achieved. [Explanation of symbols]

[0101] 10 Inner bag body 11 Opening and closing valve 12 Pressure bonding section 13 First pipe 14 Second Tube 15 Storage section 16 Partition wall (pressure-bonded part) 17 Sensors 18 Stirring member 19 Sealing member 20 Outer bag body 21 Opening and Closing 22 Light reflective layer 23 Light-transmitting diffusion layer 30 Middle bag layer 41 Culture solution 100 Algae culture device 200 light source 201 light 202 Light passing through the light-transmitting diffusion layer 203 Light reflected by the light-reflecting layer 1. Culture equipment management system 1000 extraction means 1301 Extraction part 1201 Culture Equipment Database 3000 Network 4000 Information storage means

Claims

1. an inner bag for containing the algae to be cultivated; an outer bag that houses the inner bag and has a light reflecting layer on a portion of a surface facing the inner bag and a light transmitting diffusion layer on a surface facing the light reflecting layer; An algae culture apparatus comprising:

2. The algae culture device according to claim 1 , further comprising at least one of a light-transmitting gas, liquid, and solid between the inner bag and the outer bag.

3. The algae culture device according to claim 1 , wherein the side of the outer bag having the light-transmitting diffusion layer has a smaller specific gravity than the side of the outer bag having the light-reflecting layer.

4. The inner bag has a gas permeability (cm) to at least one of nitrogen, carbon dioxide, oxygen, and hydrogen, measured under conditions of 25° C., 65% relative humidity, and an average thickness of the inner bag of 25 μm in accordance with JIS K 7126-1. ３ / (m ２ ・24h・atm) is 1,000 (cm ３ / (m ２ The algae culture apparatus according to any one of claims 1 to 3, wherein the temperature is 24 h·atm or higher.

5. The algae culture device according to claim 1 , further comprising an intermediate bag between the inner bag and the outer bag, the intermediate bag housing the inner bag.

6. 6. An algae culture device as described in any one of claims 1 to 5, comprising a pipe inserted into the inside of the inner bag through which a fluid can flow, and a sensor for detecting the state inside the inner bag.

7. The algae culture device of claim 5, wherein at least one of the inner bag, the outer bag, and the intermediate bag has a selective light transmitting layer that selectively transmits at least one of light having wavelengths of 400 nm to 500 nm and 600 nm to 700 nm.

8. A method for cultivating algae, comprising cultivating algae using the algae cultivating apparatus according to any one of claims 1 to 7.

9. The method for cultivating algae according to claim 8 , wherein the light-transmitting diffusing layer is disposed closer to a light source than the light-reflecting layer.

10. An information storage means for storing information on the algae culture device according to any one of claims 1 to 7; and an extraction means for searching for an unused culture device from the information of the culture device stored in the information storage means.

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