TW202421210A - Algae growth control device - Google Patents

Abstract

An algae proliferation control device, in particular, an algae proliferation control device for controlling the proliferation of algae in a carbon reduction ornament. The algae proliferation control device is mainly provided in a carbon reduction ornament to control the proliferation of algae in an algae culture solution, and the device includes a pH monitor for measuring the pH value of the algae culture solution and an oxygen concentration monitor for measuring the oxygen concentration of exhaust gas discharged from a culture container, and a pH reduction device for reducing the pH (acid-base value) of the algae culture solution. When the measured value of the pH monitor exceeds the first threshold, and the measured value of the oxygen concentration monitor exceeds the first threshold concentration, the pH reduction control is performed. When it is judged that the measured value of the pH monitor is lower than the second threshold, that is, the pH value lower than the first threshold, the pH reduction control is stopped.

Description

Algae proliferation control device

The present invention relates to an algae proliferation control device, in particular to an algae proliferation control device that can be used to control the algae proliferation of carbon reduction ornaments. The carbon reduction ornaments reduce external carbon dioxide through the photosynthesis of algae and can also be used as indoor home decorations.

In the Japanese patent document "Tokkaihei 8-206434", the inventor provides an air purifier using an algae, Spirulina, which can effectively purify the air and has an aesthetic appearance. The air purifier previously provided by the inventor uses a part of the circulation system for circulating Spirulina and Spirulina culture solution as a display container, and is provided with an inlet for inhaling external air and an oxygen separation device for separating oxygen in the circulation. A light-emitting body is inserted in the display container, and the carbon dioxide contained in the external air inhaled from the inlet is converted into oxygen, and pollutants are dissolved in the culture solution. Therefore, the gas separated by the oxygen separation device has been free of pollutants, and the carbon dioxide has been converted into oxygen. The air purification device previously applied for not only has the function of air purification, but also has a beautiful appearance because the light-emitting body emits light in the display container.

However, in order to pursue better results, the inventors have further thought and improved it. For example, as photosynthesis is promoted, Spirulina will continue to proliferate, and the pH value of the culture solution will rise. The increase in the pH value of the culture solution means that the nutrients required for the proliferation of Spirulina are insufficient, and the proliferation rate of Spirulina will gradually slow down. In other words, it is extremely difficult to control the proliferation of Spirulina. In view of the above problems, the present invention provides an algae proliferation control device to effectively control the proliferation of algae in carbon reduction ornaments.

The main purpose of the present invention is to provide an algae proliferation control device, which controls the proliferation of algae living in algae culture solution in a carbon reduction ornament. The carbon reduction ornament includes: a culture container for storing algae culture solution, an external air introduction nozzle installed in the culture container, and a light source device for irradiating light to the culture container. The light irradiated to the culture container can penetrate the culture container for visual confirmation. External air is blown into the algae culture solution from the external air introduction nozzle. In the process of the algae culture solution rising, the photosynthesis effect of the algae existing in the algae culture solution is used to reduce carbon dioxide and convert it into oxygen, and then the oxygen is discharged from the opening provided in the culture container. The algae proliferation control device is characterized by including: a pH monitor for measuring the pH value of the algae culture solution, an oxygen concentration monitor for measuring the oxygen concentration of the exhaust gas discharged from the culture container, and a pH reduction device for reducing and controlling the pH value of the algae culture solution. When it is determined that the measured value of the pH monitor exceeds the first threshold concentration, the pH reduction control is performed, and when it is determined that the measured value of the pH monitor is lower than the pH value of the first threshold, the pH reduction control is stopped.

In the aforementioned algae proliferation control device, the algae present in the algae culture solution is a species that will be promoted to proliferate in an alkaline solution, which may be Spirulina.

The aforementioned algae growth control device, when it is determined that the measured value of the pH monitor exceeds the first threshold value, and the measured value of the oxygen concentration monitor exceeds the first threshold concentration, will perform pH low-reduction control, thereby suppressing the rise of the pH value of the algae culture solution. In this way, the growth rate of algae can be suppressed. In addition, when the measured value of the pH monitor is lower than the second threshold value, that is, the pH concentration is lower than the first threshold value, the pH low-reduction control is stopped, thereby preventing excessive suppression of the growth rate of algae.

The aforementioned algae proliferation control device, wherein the preferred embodiment of the pH lowering device, further comprises: a recovery container for recovering the algae culture solution and a replenishing liquid bottle, wherein the replenishing liquid bottle is filled with replenishing liquid for lowering the pH of the algae culture solution.

The aforementioned algae proliferation control device, wherein the pH reduction device includes a recovery container for recovering the algae culture solution and a replenishing liquid bottle for replenishing the replenishing liquid used to reduce the pH of the algae culture solution. When reducing the pH value of the algae culture solution, the algae concentration in the algae culture solution can also be reduced at the same time.

In the aforementioned algae proliferation control device, the optimal pH value of the supplementary liquid is lower than the initial pH value of the algae culture solution.

In the aforementioned algae proliferation control device, the pH value of the supplementary liquid is lower than the initial pH value of the algae culture solution. By adding the supplementary liquid to the algae culture solution, the pH value lowering effect of the algae culture solution can be further enhanced.

A preferred embodiment of the pH reduction device in the aforementioned algae growth control device further includes a carbon dioxide introduction device for separating the external air into a high-concentration carbon dioxide gas having a higher carbon dioxide concentration than the external air and a low-concentration carbon dioxide gas having a lower carbon dioxide concentration than the external air, and while the high-concentration carbon dioxide gas is blown into the algae culture solution through the external air introduction nozzle, the low-concentration carbon dioxide gas is discharged to the outside.

The aforementioned algae proliferation control device lowers the pH of the algae culture solution by blowing high-concentration carbon dioxide gas into the algae culture solution. In addition, when the high-concentration carbon dioxide gas rises in the algae culture solution, the carbon dioxide is reduced through the photosynthesis effect of the algae in the algae culture solution, and is converted into oxygen and discharged to the outside. At the same time, low-concentration carbon dioxide gas is also discharged to the outside, so the carbon dioxide concentration of the external air can be effectively reduced.

1: Carbon reduction accessories

2: Algae proliferation control device

3: pH reduction device

5: Electronic Control Unit (ECU)

10: Culture container

10a: Inner space

11: Inner wall

12: Outer wall

13: Base plate

14: Boarding

15: Lid

15a: Opening

16: O-ring

17: Exhaust outlet

20: Light source device

21: Hollow tube

22: Light source unit

23: Light-emitting diode (LED)

30: First control device

31: Recycling container

32: Culture medium bottle

35: Culture medium circulation nozzle

40: Second control device

41: External air intake nozzle

42: Air filter

43: Inlet

50: Through pipe

60: Base

60a: Containment Room

80: Carbon dioxide introduction device

81:Compressor

82: Carbon dioxide separation ceramic membrane

A1: High concentration of carbon dioxide gas

A2: Low concentration carbon dioxide gas

A3: Exhaust gas

B1: Check valve

C1: Connector

C2: Connector

C3: Connector

L1: Algae culture medium

L2: Refilling fluid

EA: Outside air

H1: High water level

P1: Circulation pump

P2: Air pump

P3: Infusion pump

R1: Flow path

R2: Flow path

R3: Flow path

S1: Step 1

S2: Step 2

S3: Step 3

S4: Step 4

SE1: pH monitor

SE2: Oxygen concentration monitor

SE3: Water level monitor

V1: Switching valve

V2: External air switch valve

PTHR1: 1st threshold

PTHR2: 2nd threshold

OTHR: 1st threshold concentration

MP: pH value

MO: oxygen concentration

Figure 1 is a block diagram of the algae proliferation control device of the present invention.

Figure 2 is a partial front cross-sectional view of the carbon reduction ornament of the present invention.

Figure 3 is a cross-sectional view of the light source device of the present invention.

Figure 4 is a control structure block diagram of the present invention.

Figure 5 is a flow chart of the algae proliferation control process of the present invention.

【Implementation Type】

Please refer to Figures 1 to 5 at the same time. As shown in Figure 1, the present invention is provided with a culture container 10 for storing algae culture solution L1, and the culture container 10 is connected to the algae proliferation control device 2. The algae proliferation control device 2 includes a pH monitor SE1, an oxygen monitor SE2, and a pH reduction device 3. The pH reduction device 3 is composed of two devices, a first control device 30 and a second control device 40, and is connected to the culture container 10 in a detachable state through connectors C1, C2 and C3.

In the embodiment of the present invention, the algae in the algae culture solution L1 is Spirulina. In addition, the composition of the culture solution used to culture Spirulina is shown in Table 1, but is not limited thereto.

The A5-solution in the table means that 1L of algae culture solution contains 1mL of A5-solution. The A5-solution contains the contents of the components from boric acid to molybdenum trioxide shown in the table.

The culture solution shown in Table 1 is alkaline, so it is easy to absorb acidic pollutants in the air such as nitrates or sulfates, and can effectively remove pollutants. Because Spirulina is well cultured in the alkaline culture solution, it creates an environment that is difficult for other algae that proliferate in acidic solutions to survive, thus avoiding mixing with other algae.

A light source device 20 is provided in the culture container 10. The light emitted by the light source device 20 can penetrate the culture container 10 and the algae culture solution L1 for visual confirmation. By irradiating the algae culture solution L1, the photosynthesis of the algae is promoted. In addition, by visually confirming the algae culture solution L1 emitting green light, the relaxation effect of the human body can also be enhanced.

The first control device 30 includes a recovery container 31 and a replenishing liquid bottle 32, and is equipped with a pH monitor SE1 and a circulation pump P1. The pH monitor SE1 is used to measure the pH value of the algae culture solution L1. In addition, a preferred embodiment of the present invention can be provided with a heater (not shown) for maintaining the temperature of the algae culture solution L1 within a certain range. In this way, in addition to maintaining the activity of the algae, a suitable living environment can be formed.

The recovery container 31 is a container for recovering algae culture solution L1 that exceeds the set value, and is connected to the culture container 10 via the switching valve V1. In this embodiment, the switching valve V1 can be an electromagnetic three-way valve.

When the circulation pump P1 is driven, the algae culture solution L1 stored in the culture container 10 is sucked into the through pipe 50. The algae culture solution L1 sucked into the through pipe 50 is sprayed from the culture solution circulation nozzle 35 to the algae culture solution L1 through the connector C1, the circulation pump P1, the switching valve V1, and the connector C2. By appropriately selecting the spraying direction (for example, spraying along the circumferential direction), the algae culture solution L1 in the culture container 10 forms a vortex-shaped water flow.

The replenishing liquid bottle 32 stores the replenishing liquid L2. The pH value of the replenishing liquid L2 is preferably lower than the pH value of the algae culture liquid L1 in the initial state. The replenishing liquid L2 is delivered to the culture container 10 through the infusion pump P3. In addition, the infusion pump P3 is connected to a check valve B1 to prevent the replenishing liquid L2 circulating in the first control device 30 from flowing back to the replenishing liquid bottle 32.

In this embodiment, the capacity of the culture medium bottle 32 is exemplified as 2 liters, and the capacity of the recovery container 31 is exemplified as 2 liters, but it is not limited to this.

The front end of the second control device 40 is connected to the external air introduction nozzle 41. By starting the air pump P2, the external air passing through the air filter 42 will be introduced into the external air nozzle 41 to form fine bubbles, which will be blown into the algae culture solution L1, diffused and ascended. The bubbles will ascend along the vortex-shaped water flow. In this way, the time that the bubbles stay in the algae culture solution L1 can be made longer.

A carbon dioxide introduction device 80, which separates high-concentration carbon dioxide gas A1 containing a higher carbon dioxide concentration than the external air EA, and low-concentration carbon dioxide gas A2 containing a lower carbon dioxide concentration than the external air EA, and sends the high-concentration carbon dioxide gas A1 into the air filter 42, while discharging the low-concentration carbon dioxide gas A2 to the outside.

When the compressor 81 is started, the external air EA is sent to the carbon dioxide separation ceramic membrane 82. In the process of passing through the carbon dioxide separation ceramic membrane 82, the high-concentration carbon dioxide gas A1 and the low-concentration carbon dioxide gas A2 are separated. The low-concentration carbon dioxide gas A2 is discharged to the outside, and the high-concentration carbon dioxide gas A1 is sent to the algae culture liquid L1. When the compressor 81 is not started, the external air switching valve V2 can be switched to send the external air EA sucked from the suction port 43 to the external air introduction nozzle 41.

Please refer to FIG. 2 , the light source device 20 and the culture container 10 are respectively embedded in a base 60. The culture container 10 includes an inner wall 11, an outer wall 12, a bottom plate 13 and an upper plate 14, and an opening portion 15a opening upward is provided at the upper end. The lower end is embedded in the base 60 in a slidable state. The inner wall 11 and the outer wall 12 are transparent cylinders, and the outer wall 12 is concentrically arranged in the outer area of the inner wall 11. The algae culture liquid L1 is stored in the space separated by the inner wall 11, the outer wall 12 and the bottom plate 13. In addition, a cover 15 for plugging the opening portion 15a is installed at the upper end. The cover 15 is connected to the culture container 10 in a detachable state through an O-ring 16. In this embodiment, the capacity of the culture container 10 is 6 to 8 liters, but is not limited thereto.

The base 60 is provided with a receiving space 60a for receiving the first control device 30 (see FIG. 1 ) and the second control device 40 (see FIG. 1 ). That is, the first control device 30 and the second control device 40 form a structure that cannot be visually confirmed from the outside. Thus, the design variation of the carbon reduction ornament 1 can be determined by appropriately selecting the appearance of the base 60, the culture container 10, the light source device 20, etc.

The cover 15 is provided with an exhaust port 17. The external air EA diffused from the external air introduction nozzle 41 rises in the algae culture liquid L1 and is discharged to the external space through the exhaust port 17. An oxygen concentration meter SE2 (refer to FIG. 1 ) is installed at the exhaust port 17 to measure the oxygen concentration of the exhausted gas. The measured oxygen concentration value will be displayed on the display screen (not shown).

The light source device 20 is embedded in the base 60 in a slidable state and is arranged in the internal space 10a. In addition, the light source device 20 can also be embedded, adhered and fixed to the base 60. The internal space 10a shown in the present invention is a space separated by the base 60, the inner wall 11 and the upper plate 14, and is a space that is not filled with the algae culture solution L1. The light emitted from the light source device 20 can penetrate the inner wall 11, the algae culture solution L1 and the outer wall 12, thereby being visually recognized as a green light-emitting body, and the appearance is also beautiful. In addition, the green color that can be visually recognized is the color of algae. Green is a color with psychological effects such as healing, rebirth, recovery, health, relaxation, and peace of mind, so it can form a beautiful appearance that makes people feel relaxed and happy.

The light source device 20 includes a hollow tube 21 and a light source unit 22. The hollow tube 21 is a cylinder, and the lower end is fixed in a state of being embedded in the base 60. In addition, its installation position is concentric with the inner wall 11 and the outer wall 12. The light source unit 22 is composed of 8 strip-shaped light-emitting diodes (LEDs) 23 extending along the extension direction of the hollow tube 21. The light-emitting diodes (LEDs) 23 are installed at certain intervals in the peripheral direction of the hollow tube 21 (refer to Figure 3). Although the number of light-emitting diodes (LEDs) 23 in this embodiment is 8, it is not limited to this.

A through-tube 50 is disposed inside the hollow tube 21. It is a tube that extends in the direction in which the hollow tube 21 extends and penetrates the hollow tube 21. Its cross section is annular. One end of the tube is connected to the upper end of the inner wall 11, forming an integrated structure with the culture container 10. The other end of the tube is connected to the first control device 30 via a connector C1. Since the through-tube 50 is disposed inside the hollow tube 21, the through-tube 50 cannot be visually confirmed. In this way, the state in which the color of the algae can be visually confirmed can also be achieved.

By activating the circulation pump P1, the algae culture solution L1 stored in the culture container 10 is circulated again to the culture container 10 through the through pipe 50 and the culture solution circulation nozzle 35. The culture solution circulation nozzle 35 is installed on the bottom plate 13 at an angle that can spray in the peripheral direction to generate a water flow in the peripheral direction. The algae culture solution L1 that flows back from the culture solution circulation nozzle 35 is sprayed toward the algae culture solution L1 along the peripheral direction, thereby forming a vortex-shaped water flow for the algae culture solution L1 stored in the culture container 10. The vortex-like water flow can homogenize the algae contained in the algae culture solution L1, and reduce carbon dioxide more effectively.

Please refer to Figure 1 again. The present invention circulates the algae culture solution L1 between the culture container 10 and the first control device 30 by starting the first control device 30. At this time, the algae culture solution L1 sprayed from the culture solution circulation nozzle 35 will cause the algae culture solution L1 stored in the culture container 10 to form a vortex-shaped water flow.

By starting the air pump P2, the external air EA sucked from the air inlet 43 passes through the air filter 42 and is pressed to the external air introduction nozzle 41. In the process of the external air EA passing through the air filter 42, the viruses, pollen and other microscopic substances contained in it will be removed. That is, the external air EA pressed to the external air introduction nozzle 41 is a clean gas from which viruses, pollen and other microscopic substances have been removed.

The compressed external air EA diffuses in the algae culture solution L1 in the form of bubbles through the external air introduction nozzle 41. The bubbles diffused in the algae culture solution L1 rise in the algae culture solution L1 in a vortex-like diffusion state. The bubbles rise while drawing a spiral, which is very beautiful in appearance and can further enhance the decorative effect.

The algae culture solution L1 is irradiated with light from the light source device 20. The irradiation with light can promote the photosynthesis of algae, and the carbon dioxide contained in the bubbles is absorbed into the algae during the process of rising in the algae culture solution L1. At the same time, oxygen is generated from the algae to form oxygen-rich bubbles, which are discharged to the outside as gas A3 through the discharge port 17. At the same time, acidic pollutants such as nitrates or sulfates contained in the bubbles are also absorbed by the algae culture solution L1.

The oxygen in the gas A3 discharged from the outlet 17 is not artificially produced, but is produced by the photosynthesis of algae, so it also helps to create a good environment like a forest bath. In addition, you can visually confirm that the bubbles are swirling upward in the algae culture solution L1 that emits green light, and you can get a relaxing effect by entering and exiting.

When photosynthesis is continuously promoted, algae will proliferate. As algae proliferate, the pH value of the algae culture solution L1 will rise, and as the pH value rises, the algae proliferates more actively. If algae continue to proliferate, the visibility of the light emitted from the light source device 20 will deteriorate, and the algae culture solution L1 must be replaced. Frequent replacement of the algae culture solution L1 will impose a great burden on the user. From this point of view, in order to ensure good visibility for a certain period of time, installing a pH reduction device 3 to suppress the increase in the pH value of the algae culture solution L1 is also one of the countermeasures for maintenance management. Furthermore, the certain period of time envisioned in this embodiment is a period during which the user will not feel burdened by the maintenance and management operations, such as one month.

Please refer to Figure 4. The present invention is provided with an electronic control unit (ECU) 5, which is connected to a pH monitor SE1 for measuring the pH value of the algae culture solution L1, an oxygen concentration monitor SE2 for measuring the oxygen concentration of the gas discharged to the external space, etc. The electronic control unit (ECU) 5 is composed of a microcomputer formed by a CPU, RAM, ROM, and an I/O interface. The detection signals of the pH monitor SE1, oxygen concentration monitor SE2, etc. are gradually input. The output side of the electronic control unit (ECU) 5 is connected to a switching valve V1, an infusion pump P3, a compressor 81, an external air switching valve V2, etc.

Please refer to Figure 5, which is a flow chart of the algae proliferation control process of the present invention. Please refer to Figure 1. This process is continuously and repeatedly executed in the electronic control unit (ECU) 5, and it includes the following steps:

Step 1 S1, judge whether the oxygen concentration M0 of the exhaust gas A3 measured by the oxygen concentration monitor SE2 exceeds the first threshold concentration OTER, and at the same time judge whether the pH value MP of the algae culture solution measured by the pH monitor SE1 exceeds the first threshold value PTER1. Specifically, the first threshold concentration OTER is preferably 40-50%. In addition: the first threshold concentration PTER1 will not promote algae proliferation to a value above the setting value, for example, set to 10.5 under certain conditions (for example, the temperature of the algae culture solution is maintained in the setting range). When the judgment result is YES, the oxygen concentration MO exceeds the first threshold concentration OTER, and the pH value MP exceeds the first threshold PTHR1, the process proceeds to step 2 S2. When the judgment result is NO, the test continues. When the pH reduction control is not performed, the algae culture solution L1 stored in the culture container 10 flows to the culture container 10 through the through pipe 50, the flow paths R1, and R2. In addition, the external air EA will not pass through the carbon dioxide introduction device 80, but will pass through the air filter 42, be blown into the external air introduction nozzle 41, and sprayed to the algae culture solution L1.

Step 2 S2 is to perform pH low-reduction control. pH low-reduction control consists of two controls: the first control and the second control. When the first control is executed:

The switching valve V1 is activated, and the flow route of the algae culture solution L1 is changed. Specifically, the algae culture solution L1 stored in the culture container 10 is stored in the recovery container 31 through the through pipe 50, the flow path R1, the switching valve V1 and the flow path R3. As a result, the water level H1 of the algae culture solution L1 stored in the culture container 10 is reduced. When the water level H1 detected by the water level monitor SE3 decreases by more than a certain value, the switching valve V1 is activated again, and the route of the algae culture solution L1 is changed to flow back to the culture container 10. At the same time, the infusion pump P3 is activated to send the supplementary liquid L2 stored in the supplementary liquid bottle 32 into the culture container 10. The pH value of the supplementary liquid L2 is set to be lower than the initial pH value of the algae culture solution L1. In this embodiment, the initial pH value of the algae culture solution L1 is 8.8~9.2. In addition, the pH value of the supplementary liquid L2 is exemplified as 8.5, but is not limited thereto. By filling the supplementary liquid L2 until the algae culture solution L1 becomes a high pH value, the pH value of the algae culture solution L1 will be reduced. In addition, the algae culture solution L1 can also be reversed in the direction of the flow path R2 → flow path R3 to recover the algae culture solution L1 to the recovery container 31. In this way, efficient recovery can be performed. In addition, in order to further improve the recovery efficiency, a pump for reversing the algae culture solution L1 can also be added.

When the second control is executed: the compressor 81 and the external air switching valve V2 will be activated. By activating the external air switching valve V2, the external air EA can pass through the carbon dioxide introduction device 80. At the same time, the route for the external air EA to be directly sucked in is blocked. Through the activation of the compressor 81, the external air EA passes through the carbon dioxide separation ceramic membrane 82. During the process, the low-concentration carbon dioxide gas A2 with reduced carbon dioxide and the high-concentration carbon dioxide gas A1 with high carbon dioxide concentration will be separated. The high-concentration carbon dioxide gas A1 is sprayed from the external air introduction nozzle 41 to the algae culture liquid L1. In addition, the low-concentration carbon dioxide gas A2 is discharged to the outside. By continuously executing the first and second controls, the pH value MP of the algae culture solution L1 will decrease. As the pH value MP decreases, the growth of algae will be inhibited.

Step three S3, judge whether the pH value MP of the algae culture solution L1 detected by the pH monitor SE1 is lower than the second threshold PTHR2. Specifically, for example, the second threshold PTHR2 is 9.0, and under certain conditions, it is set to a value that the proliferation of algae is not lower than the set value. When the judgment result is YES, the pH value MP is lower than the second threshold PTHR2, then enter step four and stop pH reduction control. When the judgment result is NO, continue pH reduction control.

The above embodiments are only for illustrating the preferred implementation of the present invention, but not for limiting the scope of the present invention. Any slight modification or change will not lose the essence of the present invention and will not deviate from the spirit and scope of the present invention.

In summary, the algae proliferation control device of the present invention can continuously perform algae photosynthesis in a closed proliferation space. Therefore, it can be applied to structures that must form a closed space, such as purification devices for purifying the air inside nuclear radiation shelters, and has great industrial applicability. It is a practical design and a truly innovative creation. Therefore, an application for a patent is filed in accordance with the law. I hope that the Jun Bureau will review it and grant the patent as soon as possible. I will be grateful.

1: Carbon reduction accessories

2: Algae proliferation control device

3: pH reduction device

10: Culture container

10a: Inner space

17: Exhaust outlet

20: Light source device

30: First control device

31: Recycling container

32: Culture medium bottle

35: Culture medium circulation nozzle

40: Second control device

41: External air intake nozzle

42: Air filter

43: Inlet

50: Through pipe

80: Carbon dioxide introduction device

81:Compressor

82: Carbon dioxide separation ceramic membrane

A1: High concentration of carbon dioxide gas

A2: Low concentration carbon dioxide gas

A3: Exhaust gas

B1: Check valve

C1: Connector

C2: Connector

C3: Connector

L1: Algae culture medium

L2: Refilling fluid

EA: Outside air

H1: High water level

P1: Circulation pump

P2: Air pump

P3: Infusion pump

R1: Flow path

R2: Flow path

R3: Flow path

SE1: pH monitor

SE2: Oxygen concentration monitor

SE3: Water level monitor

V1: Switching valve

V2: External air switch valve

Claims (4)

An algae proliferation control device is used in a carbon reduction ornament to control the proliferation of algae in an algae culture solution. The carbon reduction ornament includes a culture container for storing algae culture solution, an external air introduction nozzle installed in the culture container, and a light source device for irradiating light to the culture container. The light of the light source device can penetrate the culture container for visual confirmation, and; the external air blown into the algae culture solution from the external air introduction nozzle, in the process of rising in the algae culture solution, reduces carbon dioxide through the photosynthesis effect of algae in the algae culture solution, and converts it into oxygen, which is discharged from the opening of the culture container; The algae proliferation control device includes a pH monitor for measuring the pH value of the algae culture solution, an oxygen concentration monitor for measuring the oxygen concentration of the gas discharged from the culture container, and a pH reduction device for reducing and controlling the pH value of the algae culture solution; when the measured value of the pH monitor exceeds the first threshold value, and the measured value of the oxygen concentration monitor exceeds the first threshold concentration, the pH reduction control is performed, and when the measured value of the pH monitor is lower than the second threshold value, that is, the pH value lower than the first threshold value, the pH reduction control is stopped. The algae proliferation control device as described in claim 1, wherein the pH lowering device further comprises: a recovery container for recovering the algae culture solution, and a supplementary liquid bottle, wherein the supplementary liquid bottle is used to add a supplementary liquid that lowers the pH value to the algae culture solution. The algae proliferation control device as described in claim 2, wherein the pH value of the supplementary liquid is lower than the initial pH value of the algae culture solution. The algae growth control device as described in claim 1, wherein the pH reduction device further includes a carbon dioxide introduction device, which separates the external air into a high-concentration carbon dioxide gas having a higher carbon dioxide concentration than the external air and a low-concentration carbon dioxide gas having a lower carbon dioxide concentration than the external air, and blows the high-concentration carbon dioxide gas into the algae culture solution through the external air introduction nozzle, while discharging the low-concentration carbon dioxide gas to the outside.

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