JP2570894Y2 - Circulating aeration and exposure stirrer for chlorella culture - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration / irradiation stirring device capable of remarkably improving the growth of chlorella algae contained in a chlorella culture pond.

[0002]

2. Description of the Related Art When culturing chlorella on an industrial scale, chlorella is usually housed together with a culture solution in a circular culture pond, and vigorously stirred while blowing carbon dioxide gas into this. As a result, a culturing method is employed in which chlorella floating on the surface of the culture solution is irradiated with light required for its propagation.

[0003]

[Problem to be solved by the invention] The life cycle of Chlorella
It grows sequentially from early dark culture to active dark culture, intermediate to dark cells, immature clear cells, semi-mature clear cells, mature clear cells, and then to fully mature clear cells (mother cells). Adolescent dark cells (daughter cells) that release even numbers of adolescent dark cells (daughter cells). In the process of growing into mature mature clear cells (mother cells) that can divide, sufficient light absorption is an essential condition, and if there is insufficient light, cell division will be hindered. In addition, the number of cells produced by division is greatly affected and drastically decreases. Therefore, a sufficient supply of light is always required. However, in the conventional culture pond described above, the depth of the culture solution is reduced to 10 to 20 cm, and the vigorous stirring is performed. However, the opportunity for receiving strong light is still insufficient. In particular, if an attempt is made to increase the depth of the culture solution to 60 cm or more for efficient cultivation, the light absorptivity is further remarkably reduced due to the mutual shielding of the individual cells themselves. Invite.
In addition, there is no sunlight irradiation at night, and it is difficult to make the most of the cell division ability of chlorella in the conventional culture method. In addition, the cultivation of this conventional chlorella on an industrial scale is carried out by suppressing the depth of the culture solution to 10-20 cm and stirring vigorously as described above.
At the same time, a sufficient supply of oxygen has been attempted and some results have been achieved.However, if the depth of the culture solution is increased to 20 cm or more and the capacity, that is, the volume of the culture solution, is increased, the stirring provided in the culture pond as in the past can be achieved. In a stirring device having blades, a sufficient stirring effect cannot be expected because the stirring blades move in parallel along the bottom of the pond. Therefore, if a submerged culture of a culture solution having a depth of 60 cm or more is carried out, the oxygen supply capacity to the chlorella culture solution is reduced, which causes the occurrence of various bacteria, which also causes a problem of failure of the culture.

[0004]

DISCLOSURE OF THE INVENTION The present invention has devised a device for suppressing aeration, exposure to light and various germs, which remarkably enhances the phenomenal growth ability of chlorella and enables deep culture of chlorella. An arm formed integrally with the rectangular water tank, rotatably pivoted around the center of the circular chlorella culture pond as a rotation axis, and a stirring blade suspended in the arm and positioned in the culture pond, An aeration / irradiation device is attached to the upper part of the rectangular aquarium-shaped arm, and a pump and a drainage pipe are suspended below the culture pond from near both ends of the inside, and the circulation / aeration / irradiation effect is also provided. It is characterized by drip.

[0005]

A chlorella is injected into the culture pond 1 together with the culture solution, and a rectangular aquarium-shaped stirring arm 6 (hereinafter referred to as an arm ) is rotated by a motor or other driving source (not shown) around the rotating shaft 3 as a fulcrum.
6 and referred) and simultaneously rotating, and the water pumps 10 (power source and light exposure device 9 is actuated to not shown), the culture solution is agitated by the agitating blade 8 which is Kakashita the arm 6. The arm 6 rotates in a circular shape, and the culture solution is swirled by such stirring, so that the Chlorella algae naturally inevitably gather in the center of the culture pond and approach an overcrowded state. come. The culture of the heart the chlorella algal cells have become overcrowded, since the adverse effects of mutual shading of chlorella cells themselves occurs, before the overcrowding, the culture of these center by water pumps 10 Siphoning, aeration
And via the water tank is circulated to the vicinity of the side wall of the pond, by constantly circulating the culture fluid is returned from the drain pipe 12 to the bottom plate of the pond and to prevent overcrowding Chlorella algae simultaneously, aerated by supplying oxygen, it is to undergo irradiation of light by exposure to light.

[0006]

[Embodiment 1] One aspect of the embodiment will be described with reference to the drawings. A rotating shaft 3 is erected on a column 2 installed at the center of a chlorella culture pond 1 having a circular shape. At the starting point, a rectangular aquarium-shaped stirring arm 6 (hereinafter referred to as an arm 6 ) made of a metal plate having a driving wheel 5 at the end is attached to the upper side of the side peripheral wall 4 of the culture pond 1.
A plurality of stirring blades supported by a metal rod 7 are suspended below the metal bar 7. The upper part of the arm is provided with an exposure device 9 to which artificial light beams such as fluorescent lamps are closely arranged, and a pumping pipe 11 suspended near the bottom of the culture pond at the bottom of both ends in the water tank. And a drainage pipe 12 also suspended close to the bottom of the culture pond, all of which are integrated into an arm that also serves as a water tank.
6 , the driving wheel 5 attached to the tip of the rotating shaft 3 moves in a circular shape along the upper part of the side peripheral wall 4 while moving, and runs while stirring the culture solution in the culture pond. It has become. As described above, since the arm 6 repeats running while rotating around the center of the culture pond, the Chlorella algae gradually gather in the center of the culture pond and tend to be overcrowded. Since such overcrowding chlorella algal cells Significant adverse effect on the culture effects, before the overcrowding, from the prior art, it is because devise also separately disposed a device for stirring the center in association with the agitator Has been given. However, the structure is complicated, and it merely ends up in agitation, and other effects cannot be expected. In other words, it's just one bird per stone. However, in the present invention, the pump 1 suspended by the arm 6
The Chlorella algae collected at the center are sucked up together with the culture solution through the pumping tube 11 and injected into the rectangular water tank integrated with the arm 6. At the time of this injection, the culture solution collides with the bottom plate of the water tank to form an air bubble, which brings about an aeration effect. As a result, sufficient oxygen is supplied, and the overcrowding state can be prevented in advance, thereby increasing the culture effect. Not only that, it also has the effect of suppressing the generation and propagation of various bacteria
Thus, a more effective culture can be achieved. Further, these culture solutions flow in the water tank and reach the drainage pipe 12, during which daytime sunlight and nighttime artificial light (from an exposure device) are applied.
As a result, a sufficient light exposure effect can be achieved, and the vigorous fertility unique to Chlorella can be promoted. Chlorella has a very short time to complete the light reaction. If there is sufficient light in science, it will be completed in a short time of only 1/1000 second. Therefore, the daylight sunlight and the artificial light irradiated to the culture solution in the aquarium at a short distance from the exposure device 9 at night are both
It is well suited to these conditions and supplies sufficient light to Chlorella algae to promote their cell division ability, so that extremely efficient culture can be performed. Thereafter, the culture solution is returned to the culture pond again through the drain pipe. The culture solution returned to the culture pond is naturally stirred again, gathers toward the center while being dispersed, and is again collected through the pumping pipe 11.
The cycle of being sucked up by 0 is repeated. Therefore, the Chlorella algae suspended in the culture solution in the culture pond repeat such circulation, receive sufficient light and oxygen supply under a uniform condition, and bring about a very good effect on the culture surface. Can be. Of course, such a device, since the Chuuyawowakatazu operation, culture
The nutrient solution is collected in the water tank of the rectangular aquarium-shaped stirring arm 6, and
During the daytime while flowing through a few meters of aquarium
Not only sunlight, but also at night without sunlight
It is possible to achieve the purpose of effective light exposure by irradiating intensive artificial light without interruption . Therefore, a more efficient culture effect can be achieved as compared with the conventional culture method. These various
The point fully utilizes the characteristics of photosynthesis possessed by chlorella, and it can be said that it is exactly four birds per stone and five birds. Also light exposure device in water, i.e., without immersion in a culture medium, there is no fear of leakage. Moreover, it is extremely simple in structure. Not only that, this device also enables submerged culture, which leads to effective use of land, culture ponds and the like. That is,
Even when the depth of the culture pond is 60 cm or more, the culture solution itself is pumped into the upper rectangular water tank through the liquid pumping pipe 11 by the water pump 10 and maintained at a depth of 10-20 cm, while maintaining the depth of 10-20 cm. Can be sufficiently received in a short period of time, so that the adverse effects caused by the mutual shielding of Chlorella algae by the deep culture can be eliminated, and the photosynthetic action can be completely performed. In addition, setting the depth of the culture solution to 60 cm or more in this way, compared to the conventional shallow culture,
It goes without saying that the volume of the culture solution, that is, the absolute volume of the culture, is several times higher, which inevitably leads to mass production.

[Brief description of the drawings]

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

[Explanation of symbols]

1 is a culture pond 2 is a center column 3 is a rotating shaft 4 is a side peripheral wall of a culture pond 5 is a driving wheel 6 is a rectangular tank-shaped stirring arm 7 is a metal rod 8 is a stirring blade 9 is an exposure device 10 is a water pump 11 is a lifting pump Liquid pipe 12 is a drain pipe

Claims (1)

(57) [Scope of request for utility model registration] 1. A side centered on a rotation axis 3 of a center of a circular culture pond.
Stirrer blade 8 pulled by drive vehicle 5 that freely travels on the peripheral wall
Rectangular type for aeration and light exposure at the top of the stirring arm with
The aquarium and the exposure device 9 and the bottom of the aquarium near the center of the pond
Pumping pipe suspended from the bottom to the bottom near the center of the pond
Pump 10 provided with 11 and a water tank at the other end near the periphery of the pond
Attach the drain pipe 12 extending from the bottom to the bottom of the pond,
A circulation type aeration / irradiation integrated stirrer, wherein the stirrer is integrated with a rectangular water tank-shaped stirring arm 6 .