JPS601875B2 - photosynthesis device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes photosynthetic substances such as algae (e.g., chlorella, spirolina, etc.), photosynthetic bacteria, and other artificially synthesized photosynthetic substances (e.g., callus, etc.). The present invention relates to a photosynthesis device for photosynthesis.

For example, a chlorella culture device has been proposed as an example of a photosynthetic device.

When culturing Chlorella (a single-celled microorganism containing chlorophyll), if the chlorella is exposed to more light than a certain value, the chlorophyll will be destroyed and a toxin (pheophorbite) will be produced, and if the amount of light is less than a certain value, photosynthesis will not proceed. Therefore, in order to carry out photosynthesis effectively, it is necessary to provide a certain level of uniform light to cells containing all photosynthetic substances. Furthermore, when living organisms are crowded together, they not only have an increased ability to proliferate per unit volume, but also have an increased resistance to other fungi. Taking these conditions into consideration, when photosynthesizing the culture medium, unless the light irradiation area per night of the culture medium is at a predetermined value, the culture efficiency will deteriorate.
The conventional approach was to reduce the number of photosynthetic substances (individuals) to improve light transmission. However, there are contradictions in this traditional method, for example, when the number of individuals increases, the light transmission rate decreases, so the individuals must be collected, and their resistance to other fungi increases. There were drawbacks such as weakening. In addition, there are disadvantages such as the light is too strong for individuals close to the light source and weak for individuals far away, and the wavelength components of the light change due to absorption by water. Ta. Therefore, ideally, the photosynthetic substances should be allowed to pass through a very narrow gap, and a certain amount of light should be given in a direction perpendicular to this gap. Attenuation of light is small, and sufficient light can be uniformly provided to cells containing all photosynthetic substances without changing the wavelength components of the light. In fact, when culturing chlorella, a large number of crab light lamps are placed in a photosynthesis reaction tank (for example, a chlorella culture tank), and photosynthetic substances are allowed to pass through the gaps between the fluorescent lights. However, using fluorescent lamps increases the size of the device, consumes a large amount of power, and furthermore, it is difficult to handle the heat generated by the fluorescent lamps. Also,
Honey light lamps generally have a peak at a specific wavelength, and in particular crab light lamps have a peak at green components that are harmful to chlorophyll, so they were not suitable as a light source for photosynthesis. Note that it is clear that natural light such as sunlight is most suitable for culturing Chlorella and the like. The present invention was made in view of the above-mentioned circumstances. For example, when culturing chlorella, if one medium is spread to the thickness of one rib, the area will be 1. When the medium is spread to the thickness of one willow,
Assuming that the illuminance of a surface light source is loo0x, the illuminance after passing through a culture medium of one thickness will be approximately 30x in a high-concentration chlorella culture medium to increase the growth ability, Almost no light reaches. In order to avoid this, it is possible to install surface light sources on both sides of a beach with a thickness of 1 willow, but in this way, the heat generation is The present invention has been made with these points in mind, and in particular uses a large number of square tube-shaped light radiators, and The distance between the radiators is set to about 2 willows or less, so that photosynthesis can be carried out effectively. Fig. 1 is a partial plan cross-sectional view of the main part for explaining one embodiment of the present invention. The interior of the photosynthesis reaction tank 10 has a radius rc (one side length r
×cos450) many equilateral triangular light radiators 11
, 11, . . . are arranged in an orderly manner at intervals of d.

Now, consider a rectangle P connecting the center ○ of each light radiator, and total area of gaps within this rectangle P (shaded area).
Finding S, S. = r cos450 × d × 40 # = d (d + 4 r cos450) ...{1', and if the length of the optical radiator is 30 arcs, the volume W of the medium that enters the void is W = H × S, Hd(d14rCoS450)...(2
} becomes.

On the other hand, the area S where the light irradiation surface of the light radiator contacts the culture medium is S=acos450×4×H=(&cos45o
)×day.・・・． ...{3l, and each value is calculated using the radius r of the optical radiator and the interval d of the optical radiator dusk as parameters, as shown in the table below.

As is clear from the table above, those whose S/W satisfies the above conditions, that is, those whose / and are greater than or equal to 1, have a distance d between the optical radiators of approximately 0.18 skin or less; As shown, the S/W is approximately determined by the distance d, and is almost unaffected by the diameter (=r) of the optical radiator.

However, as is well known, carbon dioxide gas is bubbled within the culture pond, so if this is discounted, it is possible to provide more space for the gap d, and in reality, it is possible to have a gap of about 2 sq. It is. Therefore, in the present invention, if the gap d between each optical radiator is kept at about 2 yam or less, photosynthesis can be carried out effectively regardless of the size of the optical radiator, so various types of It is possible to use combinations of light radiators of different sizes, for example, a certain number of light radiators can be configured with light tubes to emit artificial light, and the remaining light radiators can be of different diameters as described below. It consists of a small radiator light beam to emit natural light from the light guide fiber, and during the day it uses sunlight (natural light) to carry out photosynthesis, and at night when sunlight is not available, it uses fluorescent lights. It is also possible to carry out photosynthesis. Furthermore, an optical radiator using a light guide fiber can introduce sunlight (natural light) or artificial light such as a honey light lamp or a cannon lamp.
You can introduce sunlight during the day and artificial light at night, or you can introduce sunlight to a certain number of lights and artificial light to the remaining ones. Good too,
Any suitable combination of sunlight and artificial light can be used. In addition, in the present invention, since the cross-sectional shape of the optical radiator is rectangular, if the photosynthesis reaction tank in which a large number of optical radiators are arranged is formed into a rectangular or circular foundation, the optical radiator can be most effectively used for photosynthesis. It can be placed in a reaction tank. Furthermore, when the photosynthesis reaction tank is kept in a sealed structure, contamination of the culture medium, evaporation of water, etc. are eliminated, and continuous operation is possible. Furthermore, in the present invention, it is easy to increase the number of optical radiators so as to satisfy the above conditions, and therefore, it is easy to scale up the apparatus. FIG. 2 is a diagram showing an example of a natural light emitting optical radiator suitable for use in carrying out the present invention, in which 1 is a light guide cable, la is a cladding layer of the light guide cable, and l is a light guide cable.
b is a core, 2 is a light scatterer glued on the core lb,
Reference numeral 3 denotes a transparent container that seals these, and the cross section of the container 3 is a regular square as shown in FIG. The light transmitted through the optical conductor cable 1 is scattered by the light scattering body 2 and is sent to the sealed container 3.
is released to the outside (inside the photosynthetic reaction tank).

In the present invention, as described above, a large number of light radiators 11 formed in a square shape are arranged in an orderly manner within the photosynthesis reaction tank, thereby achieving the above-mentioned effects. However, it is easy to understand that the optical radiator shown in FIG. 2 is shown merely as an example, and that the present invention is not limited to the optical radiator shown in FIG. As is clear from the above description, according to the present invention, the optical radiators are arranged effectively, so the scale-up of the device is easy, and the photosynthetic reaction can be carried out effectively. .

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged plan view of a main part of a photosynthetic reaction device according to the present invention, FIG. 2 is a diagram showing an example of a light radiator used in carrying out the present invention, and FIG. -m line sectional view. 10...Photosynthesis reaction tank, 11...Light radiator. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. Consisting of a photosynthetic reaction tank and a large number of regular square tubular light radiators arranged within the photosynthetic reaction tank, characterized in that the distance between each light radiator is about 2 mm or less. A photosynthetic device. 2. The photosynthesis device according to claim 1, wherein the illuminance of the light emitted from the surface of the optical radiator is uniform. 3. Claim 1, characterized in that the light emitted from the optical radiator is the output light of a light guide fiber.
The photosynthetic apparatus described in Section. 4. According to claim 1, a predetermined number of the plurality of light radiators emit light output from a light guide fiber, and the remaining predetermined number emit light output from a fluorescent tube. The photosynthetic apparatus described. 5. The photosynthesis device according to claim 4, wherein the diameter of the light radiator that emits the output light of the light guide fiber is smaller than that of the light radiator that emits the output light of the fluorescent tube. . 6. Any one of claims 1 to 5, wherein the photosynthesis reaction tank is square or circular.
The photosynthetic apparatus described in Section. 7. The photosynthesis apparatus according to any one of claims 1 to 6, wherein the photosynthesis reaction tank has a sealed structure. 8. The photosynthesis device according to any one of claims 3 to 7, wherein the output light of the light guide fiber is natural light and/or artificial light.