Columnar reactor system for microalgae culture

Abstract

The utility model relates to the technical field of microalgae culture, and discloses a columnar reactor system for microalgae culture, which comprises a columnar reactor body and a reflux pipeline, and one end of the reflux pipeline is connected to the bottom of the columnar reactor body. The other end of the backflow pipeline is communicated to a gas exchange space at the upper part of the columnar reactor body and is provided with a spray head, and a conveying pump is arranged on the backflow pipeline and is used for conveying the microalgae culture solution or the cleaning disinfectant in the columnar reactor body to the gas exchange space and spraying the microalgae culture solution or the cleaning disinfectant to the inner wall of the columnar reactor body through the spray head; according to the columnar reactor system provided by the utility model, the gas exchange space can be thoroughly cleaned and disinfected, and the problems that microalgae cells adhered to the side wall of the columnar reactor die due to the fact that the microalgae cells cannot be in contact with a microalgae culture solution for a long time and further pollute microalgae in the whole culture system are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of microalgae cultivation, in particular to a columnar reactor system for microalgae cultivation. Background Art

[0002] A columnar photobioreactor (referred to as columnar reactor) is a common closed photobioreactor. When using a columnar reactor to cultivate microalgae, the algae solution cannot be filled, and a certain amount of gas exchange space needs to be left at the top of the columnar reactor. This part of the gas exchange space is inconvenient to be completely disinfected during the disinfection process, which makes the subsequent microalgae cultivation process prone to contamination; in addition, during the process of cultivating microalgae, the columnar reactor needs to introduce CO2 required for microalgae photosynthesis into the microalgae culture solution. Due to the existence of the gas exchange space, the ventilation operation will bulge part of the algae solution above the liquid surface and adhere to the side wall of the columnar reactor. The microalgae cells in this part of the algae solution will die due to long-term lack of contact with the microalgae culture solution, thereby contaminating the microalgae in the entire cultivation system; in addition, the algae solution adhered to the side wall of the columnar reactor is also difficult to clean, especially for columnar reactors higher than 1.5 meters, it is extremely inconvenient to clean the wall-attached microalgae, and an additional cleaning platform needs to be added, which increases the cost and difficulty of operation. Utility Model Content

[0003] The utility model aims to solve the problem that the existing columnar reactor is inconvenient to be thoroughly cleaned and disinfected due to the presence of gas exchange space, and the ventilation operation easily causes microalgae cells to adhere to the side wall of the columnar reactor and contaminate the microalgae in the entire culture system after death, and provides a columnar reactor system for microalgae culture.

[0004] In order to achieve the above-mentioned object, the utility model provides a columnar reactor system for microalgae cultivation, comprising a columnar reactor body and a reflux pipe, one end of the reflux pipe is connected to the bottom of the columnar reactor body, the other end is connected to the gas exchange space at the upper part of the columnar reactor body and a nozzle is arranged at the other end;

[0005] The reflux pipeline is provided with a delivery pump, and the delivery pump is used to deliver the microalgae culture solution or the cleaning and disinfection solution in the columnar reactor body to the gas exchange space and spray it onto the inner wall of the columnar reactor body through the nozzle.

[0006] Preferably, the columnar reactor system also includes a gas supply component and a three-way valve, the outlet of the gas supply component is connected to the first outlet of the three-way valve through a first pipe, the inlet of the three-way valve is connected to the bottom of the columnar reactor body through a second pipe, and the second outlet of the three-way valve is connected to the reflux pipe.

[0007] Preferably, a third valve is provided on the second pipeline, and a branch pipe with a fourth valve is connected to the second pipeline between the third valve and the three-way valve, and the branch pipe is used to input water or fresh microalgae culture solution into the second pipeline.

[0008] Preferably, the three-way valve is an electric three-way valve.

[0009] Preferably, a regulating device is provided on the first pipeline, and the regulating device is used to regulate the gas flow in the first pipeline.

[0010] Preferably, a harvesting pipeline is connected to the return pipeline located at the outlet side of the delivery pump, and the other end of the harvesting pipeline is connected to a harvesting device;

[0011] A first valve is provided on the downstream side of the return pipe connected to the harvest pipe, and a second valve is provided on the harvest pipe.

[0012] Preferably, an annular pipe is provided in the gas exchange space of the columnar reactor body, and the annular pipe is arranged in the horizontal direction and is connected with the reflux pipe;

[0013] There are multiple nozzles, and the multiple nozzles are arranged at intervals along the circumference of the annular pipe.

[0014] Preferably, the nozzle is a 360° rotating nozzle.

[0015] Preferably, a feeding and exhaust port is provided at the upper portion of the columnar reactor body, and the feeding and exhaust port is used for inoculating and feeding into the columnar reactor body or exhausting the gas in the columnar reactor body.

[0016] Preferably, a temperature control device is provided on the columnar reactor body for controlling the temperature of the microalgae culture solution in the columnar reactor body.

[0017] Through the above technical solution, during the microalgae cultivation process, the microalgae culture solution in the columnar reactor body is transported to the gas exchange space through the delivery pump on the reflux pipe to provide power, and the microalgae culture solution is sprayed onto the inner wall of the columnar reactor body through the nozzle installed at the end of the reflux pipe. In this way, the problem of microalgae cells adhering to the side wall of the columnar reactor body dying due to long-term lack of contact with the microalgae culture solution can be effectively avoided, thereby preventing them from contaminating the microalgae in the entire cultivation system;

[0018] During the cleaning and disinfection process of the columnar reactor body, the delivery pump on the reflux pipe provides power to deliver the cleaning and disinfection liquid in the columnar reactor body to the gas exchange space, and the nozzle installed at the end of the reflux pipe is used to spray in the gas exchange space, thereby ensuring that the gas exchange space is thoroughly cleaned and disinfected, preventing the problem of subsequent microalgae culture failure due to incomplete cleaning and disinfection, and ensuring the success rate of microalgae culture; moreover, the columnar reactor system provided by the utility model can also simplify the cleaning and disinfection work, significantly reducing the labor cost of the cleaning and disinfection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a columnar reactor system for microalgae cultivation provided by the utility model;

[0020] Figure 2 The utility model is a structural schematic diagram of an annular pipeline equipped with a nozzle.

[0021] Description of Reference Numerals

[0022] 10. Columnar reactor body; 101. Gas exchange space; 11. Second pipeline; 111. Third valve; 12. Feed exhaust port; 13. Temperature control device; 20. Reflux pipeline; 201. First valve; 21. Delivery pump; 22. Harvesting pipeline; 221. Second valve; 23. Annular pipeline; 30. Nozzle; 40. Gas supply assembly; 41. First pipeline; 411. Adjustment device; 50. Three-way valve; 51. First outlet; 52. Inlet; 53. Second outlet; 60. Branch pipe; 61. Fourth valve. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0024] As mentioned above, combined with Figure 1 As shown, the utility model provides a columnar reactor system for microalgae cultivation, which includes a columnar reactor body 10 and a reflux pipe 20, one end of the reflux pipe 20 is connected to the bottom of the columnar reactor body 10, and the other end is connected to the gas exchange space 101 at the upper part of the columnar reactor body 10 and a nozzle 30 is arranged at the other end; a delivery pump 21 is arranged on the reflux pipe 20, and the delivery pump 21 is used to deliver the microalgae culture solution or cleaning and disinfection solution in the columnar reactor body 10 to the gas exchange space 101 and spray it onto the inner wall of the columnar reactor body 10 through the nozzle 30.

[0025] According to the columnar reactor system provided by the utility model, during the microalgae cultivation process, the microalgae culture solution in the columnar reactor body 10 is transported to the gas exchange space 101 by providing power through the delivery pump 21 on the reflux pipe 20, and the microalgae culture solution is sprayed onto the inner wall of the columnar reactor body 10 through the nozzle 30 installed at the end of the reflux pipe 20. This can effectively avoid the problem of microalgae cells adhering to the side wall of the columnar reactor body 10 dying due to long-term lack of contact with the microalgae culture solution, thereby preventing them from contaminating the microalgae in the entire cultivation system.

[0026] During the cleaning and disinfection process of the columnar reactor body 10, the delivery pump 21 on the reflux pipe 20 provides power to deliver the cleaning and disinfection liquid in the columnar reactor body 10 to the gas exchange space 101, and the nozzle 30 installed at the end of the reflux pipe 20 is used to spray in the gas exchange space 101, thereby ensuring that the gas exchange space 101 is thoroughly cleaned and disinfected, preventing the problem of subsequent microalgae culture failure due to incomplete cleaning and disinfection, and ensuring the success rate of microalgae culture; moreover, the columnar reactor system provided by the utility model can also simplify the cleaning and disinfection work, significantly reducing the labor cost of the cleaning and disinfection process.

[0027] The present invention does not specifically limit the structure of the columnar reactor body 10 , for example, it may be cylindrical or rectangular; in order to facilitate photosynthesis of microalgae, the columnar reactor body 10 is made of transparent materials, such as glass, acrylic, PVC or PC.

[0028] In some embodiments, the columnar reactor system also includes a gas supply component 40 and a three-way valve 50, the outlet of the gas supply component 40 is connected to the first outlet 51 of the three-way valve 50 through a first pipe 41, the inlet 52 of the three-way valve 50 is connected to the bottom of the columnar reactor body 10 through a second pipe 11, and the second outlet 53 of the three-way valve 50 is connected to the reflux pipe 20.

[0029] In the present invention, the gas supply assembly 40 is used to introduce CO2 required for photosynthesis of microalgae into the microalgae culture solution of the columnar reactor body 10. The gas supply assembly 40 can be commonly used in existing columnar reactors for culturing microalgae, and the present invention will not elaborate on it here.

[0030] In the present invention, the gas supply assembly 40 and the reflux pipe 20 are integrated at the bottom of the columnar reactor body 10 through the three-way valve 50, reducing the number of pipes at the bottom of the columnar reactor body 10. It should be noted that, according to the inventor's practice, in one microalgae culture cycle, the reflux pipe 20 transports the microalgae culture solution to the gas exchange space 101 and cooperates with the nozzle 30 to spray it onto the inner wall of the columnar reactor body 10 only 2-3 times, which can effectively prevent the microalgae cells adhering to the side wall of the columnar reactor from dying due to the lack of contact with the microalgae culture solution.

[0031] According to the above technical scheme, during the microalgae cultivation process, the inlet 52 of the three-way valve 50 is connected to the first outlet 51, and the second outlet 53 is blocked. At this time, the gas provided by the gas supply component 40 can continuously enter the microalgae culture solution in the columnar reactor body 10 through the first pipe 41 and the second pipe 11. When it is necessary to spray the inner wall of the columnar reactor body 10 in the gas exchange space 101, the three-way valve 50 is reversed to connect the inlet 52 with the second outlet 53, and the first outlet 51 is blocked. The delivery pump 21 is turned on to deliver the microalgae culture solution in the columnar reactor body 10 to the gas exchange space 101 through the reflux pipe 20, and spray it onto the inner wall of the columnar reactor body 10 through the nozzle 30. After the spraying is completed, the three-way valve 50 is switched to restore the gas supply of the gas supply component 40 to the columnar reactor body 10.

[0032] The column reactor system provided by the utility model, before culturing microalgae, puts the culture volume of water into the column reactor body 10, adds sodium hypochlorite, makes the concentration of sodium hypochlorite about 0.1wt.%, changes the three-way valve 50 so that the inlet 52 is connected with the second outlet 53, the first outlet 51 is blocked, starts the delivery pump 21, disinfects for about 12 hours, after the disinfection is completed, continues to add sodium thiosulfate into the column reactor body 10, keeps the delivery pump 21 turned on to achieve the neutralization of sodium hypochlorite and sodium thiosulfate, after the neutralization is completed, closes the delivery pump 21, adds culture solution into the column reactor body 10, adds algae species, changes the three-way valve 50 so that the inlet 52 is connected with the first outlet 51, the second outlet 53 is blocked, starts the gas supply component 40 to supply gas into the column reactor body 10, and enters the microalgae culturing stage.

[0033] After the microalgae are cultivated and harvested, washing water is added into the columnar reactor body 10 (the amount added accounts for 10%-20% of the volume of the columnar reactor body 10), and the delivery pump 21 is turned on for all-round spray flushing. If the inner wall of the columnar reactor body 10 is adhered to the wall or scaled, citric acid is added to the washing water with a concentration of 10-15wt.%.

[0034] In some embodiments, a third valve 111 is provided on the second pipe 11, and a branch pipe 60 with a fourth valve 61 is connected to the second pipe 11 between the third valve 111 and the three-way valve 50, and the branch pipe 60 is used to input water or fresh microalgae culture solution into the second pipe 11. It can be understood that after a reflux and spraying of the microalgae culture solution, microalgae cells will remain in the reflux pipe 20. By providing the branch pipe 60 to input water or fresh microalgae culture solution into the second pipe 11, the entire reflux pipe 20 is flushed to avoid the pollution problem caused by the death of the residual microalgae cells.

[0035] In some embodiments, the three-way valve 50 is an electric three-way valve. By setting it as an electric three-way valve to achieve automatic control, the automation level of the entire column reactor system is improved.

[0036] In some embodiments, a regulating device 411 is disposed on the first pipeline 41 , and the regulating device 411 is used to regulate the gas flow in the first pipeline 41 .

[0037] In some embodiments, a harvesting pipe 22 is connected to the return pipe 20 located on the outlet side of the delivery pump 21, and the other end of the harvesting pipe 22 is connected to a harvesting device; a first valve 201 is provided on the downstream side of the return pipe 20 connected to the harvesting pipe 22, and a second valve 221 is provided on the harvesting pipe 22.

[0038] It can be understood that by integrating the harvesting pipe 22 into the reflux pipe 20 on the outlet side of the delivery pump 21, after the microalgae are cultivated, the microalgae culture solution rich in microalgae can be delivered to the harvesting device through the delivery pump 21, thereby further improving the integration of the entire column reactor system.

[0039] In some embodiments, in combination Figure 2 As shown, an annular pipe 23 is provided in the gas exchange space 101 of the columnar reactor body 10, and the annular pipe 23 is arranged in the horizontal direction and communicated with the reflux pipe 20; a plurality of the nozzles 30 are provided, and the plurality of the nozzles 30 are arranged at intervals along the circumference of the annular pipe 23. Through this structural arrangement, the microalgae culture solution can be sprayed more fully and evenly onto the inner wall of the columnar reactor body 10, so that the microalgae cells adhered to the inner wall of the columnar reactor body 10 are washed below the liquid surface, or at least can be infiltrated by the microalgae culture solution, thereby avoiding the problem of death caused by long-term lack of contact with the microalgae culture solution and further causing pollution.

[0040] In the present invention, the nozzle 30 can be selected as a normal pressure nozzle or a high pressure nozzle. In some embodiments, the nozzle 30 is a 360° rotating nozzle, so that all-round spraying can be achieved.

[0041] In some embodiments, a feeding and exhaust port 12 is disposed at the upper portion of the columnar reactor body 10 , and the feeding and exhaust port 12 is used to inoculate, feed or exhaust gas in the columnar reactor body 10 .

[0042] In some embodiments, a plurality of the feeding and exhaust ports 12 are provided, and the plurality of the feeding and exhaust ports 12 are spaced apart on the upper portion of the columnar reactor body 10 . By providing a plurality of feeding and exhaust ports 12 , the inoculation, feeding or exhaust functions can be independently realized.

[0043] In some embodiments, a temperature control device 13 is disposed on the columnar reactor body 10 to control the temperature of the microalgae culture solution in the columnar reactor body 10 .

[0044] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A columnar reactor system for microalgae cultivation, characterized in that: It comprises a columnar reactor body (10) and a reflux pipe (20), wherein one end of the reflux pipe (20) is connected to the bottom of the columnar reactor body (10), the other end is connected to the gas exchange space (101) at the top of the columnar reactor body (10) and a nozzle (30) is arranged at the other end; The reflux pipe (20) is provided with a delivery pump (21), and the delivery pump (21) is used to deliver the microalgae culture solution or cleaning and disinfection solution in the columnar reactor body (10) to the gas exchange space (101) and spray it onto the inner wall of the columnar reactor body (10) through the nozzle (30).

2. The columnar reactor system for microalgae cultivation according to claim 1, characterized in that: The column reactor system further comprises a gas supply component (40) and a three-way valve (50), wherein the outlet of the gas supply component (40) is connected to the first outlet (51) of the three-way valve (50) via a first pipe (41), the inlet (52) of the three-way valve (50) is connected to the bottom of the column reactor body (10) via a second pipe (11), and the second outlet (53) of the three-way valve (50) is connected to the reflux pipe (20).

3. The columnar reactor system for microalgae cultivation according to claim 2, characterized in that: The second pipeline (11) is provided with a third valve (111), and a branch pipe (60) with a fourth valve (61) is connected to the second pipeline (11) between the third valve (111) and the three-way valve (50), and the branch pipe (60) is used to input water or fresh microalgae culture liquid into the second pipeline (11).

4. The columnar reactor system for microalgae cultivation according to claim 2, characterized in that: The three-way valve (50) is an electric three-way valve.

5. The column reactor system for microalgae cultivation according to claim 2, characterized in that: The first pipeline (41) is provided with a regulating device (411), and the regulating device (411) is used to regulate the gas flow in the first pipeline (41).

6. The column reactor system for microalgae cultivation according to claim 1, characterized in that: A harvesting pipe (22) is connected to the return pipe (20) located at the outlet side of the delivery pump (21), and the other end of the harvesting pipe (22) is connected to a harvesting device; A first valve (201) is provided on the downstream side of the return pipe (20) connected to the harvest pipe (22), and a second valve (221) is provided on the harvest pipe (22).

7. The column reactor system for microalgae cultivation according to claim 1, characterized in that: An annular pipe (23) is provided in the gas exchange space (101) of the columnar reactor body (10), and the annular pipe (23) is arranged in a horizontal direction and is connected to the reflux pipe (20); A plurality of the nozzles (30) are provided, and the plurality of nozzles (30) are arranged at intervals along the circumference of the annular pipe (23).

8. The column reactor system for microalgae cultivation according to any one of claims 1 to 7, characterized in that: The nozzle (30) is a 360° rotating nozzle.

9. The column reactor system for microalgae cultivation according to claim 8, characterized in that: The upper part of the columnar reactor body (10) is provided with a feeding and exhaust port (12), and the feeding and exhaust port (12) is used to inoculate and feed into the columnar reactor body (10) or to exhaust the gas in the columnar reactor body (10).

10. The column reactor system for microalgae cultivation according to claim 8, characterized in that: The columnar reactor body (10) is provided with a temperature control device (13) for controlling the temperature of the microalgae culture solution in the columnar reactor body (10).

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