JPH08218U - Circulating aeration / light agitation device for culturing Chlorella - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a safe stirring device that replaces the conventional stirring device for chlorella culture and that significantly improves the growth of chlorella. [Structure] An arm consisting of a rectangular water tank rotatably pivoted around the center of a circular chlorella culture pond as a rotation axis and a stirring blade suspended in the arm and positioned in the culture pond. Circulating / aeration with a light pump attached to the upper part of the rectangular aquarium-shaped arm and equipped with a pump for pumping and a drainage pipe suspended from both ends inside to below the culture pond.
Light exposure stirring device. [Effect] A light exposure device is attached to the upper part of the rectangular aquarium-shaped arm, and a pumping pump and a pumping drainage pipe are suspended from both ends of the inside to below the culture pond to constantly circulate, aerate, and expose light. It is a stirrer that can be performed. Compared with the conventional stirrer, it does not end with merely stirring, but also has effects of stirring, circulation, aeration, light exposure, and bacterial control.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an aeration / exposure stirrer capable of significantly improving the reproduction of chlorella algae stored in a chlorella culture pond.

[0002]

[Prior art]

 When culturing chlorella on an industrial scale, normally, chlorella is stored together with the culture solution in a circular culture pond, and carbon dioxide is blown into the chlorella and vigorously stirred, whereby the culture solution is cultivated. A culturing method is used in which chlorella that emerges on the surface is irradiated with the light necessary for its reproduction.

[0003]

[Issues to be solved by the device]

 The life cycle of Chlorella grows gradually from the dark culture of the infancy and grows in the active stage dark culture, intermediate type with dark cells, immature clear cells, semi-mature clear cells, mature clear cells and then to fully mature clear cells (mother cells). ), Which undergoes cell division to release an even number of dark cell (daughter cells) in the childhood again. Among these, only the ones caused by cell division occur. In the process of growing from dark cells (daughter cells) in childhood to fully mature clear cells (mother cells) that can divide, sufficient absorption of light is an essential condition. For example, cell division is impaired, and the population of cells generated by division is greatly affected and drastically reduced. Therefore, sufficient light supply is always required. However, although the conventional culture ponds described above have been devised such that the depth of the culture solution is limited to 10-20 cm and further vigorous stirring is performed, the opportunity to receive strong light is still insufficient. In particular, if the culture solution is made to have a depth of 60 cm or more and a highly efficient culture is attempted, the light absorption is further significantly reduced due to the mutual shielding of the individual cells themselves. It causes failure. In addition, there is naturally no sunlight irradiation at night, and it is difficult to utilize the cell division ability of chlorella to the maximum in the conventional culture method. Also, in the conventional culturing of chlorella in an industrial scale, the depth of the culture solution was suppressed to 10 to 20 cm as described above, and at the same time, sufficient supply of oxygen was tried, and some results were obtained. However, if the depth of the culture solution is set to 20 cm or more and the volume, that is, the culture solution volume is increased, in a conventional stirring device with stirring blades provided in the culture pond, the stirring blades are at the bottom of the pond. Since it moves in parallel along the line, a sufficient stirring effect cannot be expected. Therefore, if deep culture of a culture solution with a depth of 60 cm or more is carried out, the oxygen supply capacity to the chlorella culture solution will be reduced, leading to the generation of various bacteria, resulting in the failure of the culture.

[0004]

[Means for Solving the Problems]

 The present invention has devised an aeration / exposure / miscellaneous bacterial agitation device that significantly improves the amazing growth ability of chlorella and enables deep-layer culture of chlorella. It consists of an arm that is rotatably pivoted around the center of the circular chlorella culture pond as the axis of rotation and that is integral with the rectangular water tank, and a stirring blade that is suspended in the arm and that is located inside the culture pond. An aerating / lighting device is attached to the upper part of the above rectangular water tank-shaped arm, and a pumping pump and a drainage pipe suspended from both ends inside to below the culture pond are provided to provide circulation, aerating and lightening effects. It is characterized by being able to bring.

[0005]

[Action]

 Chlorella is poured into the culture pond 1 together with the culture solution, and the arm 6 is rotated around the rotation shaft 3 by a motor or other drive source (not shown), and at the same time, the light exposure device 9 and the pump 10 (power supply). (Not shown) is operated, the culture solution is stirred by the stirring blade 8 suspended from the arm 6. The arm 6 rotates in a circular shape and the culture solution is swirled by such agitation, so that the Chlorella algae inevitably gather in the center of the sequential culture pond and move to a nearly overcrowded state. In the culture solution in the central part where the chlorella algae are overcrowded, there is a harmful effect due to mutual shielding of the chlorella cells themselves. Circulate around the side wall and return from the drainage pipe 12 to the bottom of the culture pond to constantly circulate the culture solution to prevent the overcrowding of the Chlorella algal cells, and at the same time aerate oxygen and supply light to expose light. Irradiate.

[0006]

[Example 1] To explain an example of the embodiment with reference to the drawings, a rotary shaft 3 is planted on an upper portion of a column 2 installed at the center of a circular chlorella culture pond 1, and the rotary shaft 3 A rectangular aquarium-shaped arm 6 made of a metal plate having a drive wheel 5 at the tip is attached to the upper part of the side wall 4 of the culture basin 1 from the upper part of the above, and a metal rod is provided below the arm 6. A plurality of stirring blades 8 supported by 7 are suspended. A light exposure device 9 equipped with artificial light rays such as fluorescent lamps closely arranged is installed on the upper part of the arm, and a pumping pipe 11 suspended at the bottom of both ends of the water tank near the bottom of the culture pond. A pumping pump 10 equipped with a drainage pipe 12 and a drainage pipe 12 suspended near the bottom plate of the culture pond are attached, and all of them are integrated to form an arm 6, with the rotating shaft 3 serving as a fulcrum. A drive wheel 5 attached to the front end of the drive wheel 5 moves in a circle along the upper part of the side peripheral wall 4 and runs while stirring the culture solution in the culture pond. As the arm 6 naturally rotates around the center of the culture pond as a fulcrum, the arm 6 repeats its rotation, so that the Chlorella algae gradually gather in the center of the culture pond and tend to become overcrowded as described above. . Since such an overcrowded state of Chlorella algal cells has a significant adverse effect on the culturing effect, before the overcrowded state, measures such as arranging a separate device for stirring the central part have been taken. Came. However, the structure is complicated, and it is only agitation, and other effects cannot be expected. In other words, it's just one stone, one bird. However, in the present invention, the pumping pump 10 suspended on the arm 6 always sucks up the chlorella alga collected in the central part together with the culture solution through the pumping pipe 11 to form an integrated body with the arm 6. Pour into the eggplant rectangular water tank. At the time of this injection, the culture solution collides with the bottom plate of the water tank and becomes a foaming state, resulting in an aeration effect, and as a result, sufficient oxygen is supplied, and an overcrowded state can be prevented in advance to enhance the culture effect. Not only can this be achieved, but at the same time the effect of suppressing the generation and reproduction of various bacteria can be achieved. Further, while these culture liquids flow through the tank to the drainage pipe 12, during this period, they are fully irradiated with artificial light from the light exposure device 9 to achieve a concentrated light exposure effect, and vigorous growth unique to Chlorella. Power can be promoted. Chlorella takes a very short time to complete the light reaction. Academically, if the light is sufficient, it will be completed in a short time of only one thousandth of a second. Therefore, the artificial light emitted from the exposure device 9 to the culture solution in the aquarium at a close range is well suited to this condition and supplies sufficient light to the Chlorella algal cells to promote their cell division ability. Highly efficient culture can be performed. Then, the culture solution is returned to the culture pond again through the drainage pipe 12. Naturally, the culture solution returned to the culture pond is again stirred, and while being dispersed, collects toward the center, and is repeatedly sucked up by the pump 10 through the pump 11 to repeat the circulation. Therefore, the Chlorella algal cells suspended in the culture solution in the culture pond repeat such circulation to receive a sufficient supply of light and oxygen under a uniform condition, and have an extremely good effect on the culture surface. Can bring Of course, such a device operates day and night, so it is effective even at night when there is no sunlight, and likewise concentrates sufficient light for the purpose of effective light exposure. Since it can be achieved, more efficient culture effect can be achieved as compared with the conventional culture method. This fully utilizes the characteristics of chlorella's photosynthesis, and can be said to be exactly four or five birds with one stone. Further, since the light exposure device is mounted above the arm 6 without being immersed in water, that is, in the culture solution, there is no contact with water and there is no risk of leakage. Moreover, the structure is extremely simple. Not only that, this device also enables deep culture, leading to effective use of land and culture pond. In other words, even if the depth of the culture solution is 60 cm or more, the culture solution itself is pumped up by the pumping pump 10 through the pumping pipe 11 into the rectangular tank at the top, while maintaining the depth of 10-20 cm Since the light irradiation of the device 9 can be sufficiently received in a short time, the adverse effect caused by the mutual blockage of the cells of the Chlorella algal cells due to the deep culture can be eliminated, and the photosynthetic effect can be fully performed. In addition, making the depth of the culture broth 60 cm or more in this way increases the volume of the culture broth, that is, the absolute volume of the culture, to several times that of the conventional shallow culture, which inevitably leads to mass production increase. Rising is no different.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1 is a culture basin 2 is a central column 3 is a rotating shaft 4 is a side wall of the culture basin 5 is a drive wheel 6 is a rectangular water tank-shaped arm 7 is a metal rod 8 is a stirring blade 9 is an exposure device 10 is a pump pump 11 Pumping pipe 12 is a drainage pipe

Claims (1)

[Scope of utility model registration request] 1. Circulating aeration in which a light source, a pumping pump and a water tank having a drainage pipe are mounted on the upper part of an agitator which is rotatably driven about the center of a circular chlorella culture pond.
Light exposure stirring device