Composite microalgae culture system

Abstract

The utility model provides a microalgae culture system which comprises a photosynthetic reaction module, a growth adjusting module, a harvesting module and an oxygen discharging and dead algae separating module, the photosynthetic reaction module is provided with a light-transmitting disc tube, the growth adjusting module is provided with an adjusting groove, and the interior of the adjusting groove is divided into bent flow channels through a plurality of partition plates; the culture solution is subjected to high-intensity photosynthetic reaction in the photosynthetic reaction module and then enters the growth regulation module to grow in an environment with the intensity lower than that of the photosynthetic reaction of the photosynthetic reaction module, and then the algae in the culture solution are harvested by the harvesting module after the algae grow to a harvesting standard.

Description

Technical Field

[0001] The present application relates to a composite microalgae cultivation system, and in particular to a composite microalgae cultivation system for cultivating algae microorganisms. Background Art

[0002] Algae such as cyanobacteria (Spirulina) and haematococcus (Haematococcus Pluvialis Flotow) are rich in protein, minerals, vitamins, enzymes, antioxidants, astaxanthin, and other nutrients beneficial to the human body. In recent years, they have been widely recommended for consumption, and biodiesel has even been extracted from algae for energy purposes. Algae culture media undergoes a photosynthetic reaction system to generate sufficient nutrients for the algal cells, and the oxygen generated in the culture media is released, enabling the algae to grow and reproduce in large quantities.

[0003] Conventional algae photosynthetic reaction systems typically utilize large, open-air culture tanks. Algae culture fluid is stored within these tanks for photosynthesis. However, these large tanks not only occupy a large area and consume a lot of energy, but are also subject to weather conditions and are susceptible to contamination, which can affect the quality of the algae and cause numerous problems for producers.

[0004] To address the shortcomings of open algae cultivation systems, some existing algae cultivation systems utilize closed photosynthetic reactor structures. For example, Chinese Patent CN101353619B discloses an algae cultivation system utilizing a spiral photosynthetic reactor. This system comprises a spiral-shaped photosynthetic reactor, allowing algae to photosynthesize within the closed spiral tube. This reduces the space occupied by the cultivation system and the risk of algae contamination. This system also incorporates an oxygen exhaust system and a temperature control device to exhaust oxygen generated in the culture medium and control the temperature of the culture medium.

[0005] However, this closed algae cultivation system, in which microalgae undergo photosynthesis and lysis growth in closed pipes, has limited capacity for spiral reactors and equipment costs far greater than those of open culture tanks. Therefore, although the algae produced are of high quality, they are not suitable for mass production.

[0006] Moreover, during the algae cultivation process, when the culture medium is harvested, the remaining algae in the culture medium may be damaged. In addition, because the temperature is too high or the algae clump in the tank or pipe, it will cause dead algae and affect the quality of the output algae.

[0007] Due to the above reasons, the existing algae cultivation system has shortcomings. Therefore, how to overcome the above defects through structural design improvements has become one of the important issues that this industry wants to solve. Utility Model Content

[0008] The technical problem to be solved by the present application is to improve the shortcomings of the existing closed microalgae cultivation method, which is not suitable for mass production and is prone to algae death.

[0009] In order to solve the above-mentioned technical problems, one of the technical solutions adopted in the present application is to provide a microalgae cultivation system, which includes: a photosynthetic reaction module, the photosynthetic reaction module having a transparent optical tube and a light source device; the photosynthetic reaction module can define an inlet and an outlet, and the culture solution for cultivating microalgae enters the transparent optical tube from the inlet and is discharged from the outlet; the light source device is adjacent to the transparent optical tube and can adjust the intensity and wavelength of the output light to provide the algae in the culture solution in the transparent optical tube with the light required for photosynthetic reaction; a growth regulation module, the growth regulation module having an adjustment tank, and a plurality of first partitions and a plurality of first partitions arranged inside the adjustment tank. The regulating tank can define an inlet end and an outlet end at both ends of the longitudinal axis, and a plurality of the first and second partitions are arranged inside the regulating tank along the longitudinal axis in a staggered and spaced manner, thereby dividing the inside of the regulating tank into a curved flow channel connected between the inlet end and the outlet end; a harvesting module is connected to the outlet end of the growth regulating module, and is used to perform a harvesting procedure to harvest part of the microalgae in the culture solution; a growth monitoring device is arranged at the outlet end of the growth regulating module, and is used to monitor the growth of algae in the growth regulating module; a diversion device is arranged between the growth regulating module and the harvesting module, The diverter device is connected to a reflux pipe and is connected to the inlet end of the photosynthetic reaction module through the reflux pipe; the diverter device is configured to control the culture solution in the growth regulation module to selectively flow into the harvesting module, or to flow back to the inlet end of the photosynthetic reaction module through the reflux pipe; and a pressurized delivery device is connected to the outlet end of the harvesting module, and is used to deliver the culture solution discharged from the harvesting module back into the inlet end of the photosynthetic reaction unit; wherein the microalgae cultivation system is configured so that the culture solution of the algae is first subjected to a photosynthetic growth process in the photosynthetic reaction module, and then flows into the growth regulation module through a pipeline, and the growth monitoring device detects the growth The growth condition of algae in the culture solution in the regulating tank of the regulating module is monitored, and when the growth condition of the algae in the regulating tank reaches the harvestable standard, the culture solution is controlled to enter the harvesting module through the diversion device, and the algae in the culture solution are harvested by the harvesting module, and then the culture solution after the algae are harvested by the harvesting module is re-transported to the inlet end of the photosynthetic reaction module through the pressurized conveying device; or when the growth monitoring device detects that the growth condition of the algae in the regulating tank does not reach the harvestable standard, the culture solution is controlled to flow back to the inlet end of the photosynthetic reaction module through the reflux pipe through the diversion device, so that the algae in the culture solution can photosynthesize again in the photosynthetic reaction module.

[0010] A preferred embodiment of the present application further includes: an oxygen exhaust and dead algae separation module, the oxygen exhaust and dead algae separation module has an atomizing exhaust cylinder, and a liquid collecting cylinder connected to the lower end of the atomizing exhaust cylinder, one side of the atomizing exhaust cylinder has an atomizing nozzle, the atomizing nozzle is connected to the pressurized conveying device, and the culture liquid is sprayed into the atomizing exhaust cylinder through the atomizing nozzle; an oxygen exhaust pipe is provided in the center of the atomizing exhaust cylinder, and a hollow tube is sleeved on the outside of the oxygen exhaust pipe; the upper end of the oxygen exhaust pipe extends to the upper end of the atomizing exhaust cylinder, and the bottom extends to the bottom of the liquid collecting cylinder The upper end of the hollow tube extends to the outside of the upper end of the atomizing exhaust cylinder, and the lower end opening extends to a position between the upper part of the liquid collecting cylinder and the lower part of the atomizing nozzle; and an exhaust device is connected to the upper part of the oxygen exhaust pipe and the hollow tube; wherein, the culture liquid is sprayed into the atomizing exhaust cylinder through the atomizing nozzle, so that the culture liquid forms atomized liquid particles after being sprayed on the outside of the hollow tube, and the dead algae in the culture liquid float in the atomizing exhaust cylinder, and the oxygen and dead algae are extracted through the oxygen exhaust pipe and the hollow tube by the exhaust device.

[0011] In another preferred embodiment of the present application, the adjustment tank reduces or isolates light to slow down or stop the photosynthesis of microalgae in the culture solution, so that the algae in the adjustment tank can grow in an environment with a lower photosynthetic reaction intensity than that of the photosynthetic reaction module; the volume of the adjustment tank of the growth adjustment module is equal to or greater than the volume of the photosynthetic reaction module, and the residence time of the culture solution in the growth adjustment module is not less than the residence time of the culture solution in the photosynthetic reaction module.

[0012] In another preferred embodiment of the present application, the growth regulating module further comprises a light control device for controlling the light irradiation intensity of the regulating tank, thereby reducing or stopping the intensity of photosynthesis of the algae in the regulating tank.

[0013] In another preferred embodiment of the present application, the adjustment slot is a slot body with light permeable on the upper side, and the light control device is a blackout curtain arranged above the adjustment slot.

[0014] In another preferred embodiment of the present application, the growth regulation module further comprises a temperature control device disposed at the inlet end of the growth regulation module, for controlling the temperature of the culture solution in the regulation tank.

[0015] In another preferred embodiment of the present application, the temperature control device is a heat exchanger.

[0016] In another preferred embodiment of the present application, the diversion device further includes a reflux conveying device arranged in the reflux pipe.

[0017] In another preferred embodiment of the present application, the harvesting module has a filter assembly and a culture fluid receiving tank, the culture fluid passes through the filter assembly, and a portion of the microalgae in the culture fluid is harvested through the filter assembly, and the culture fluid passing through the filter assembly enters the culture fluid receiving tank.

[0018] The beneficial effect of the present application is that the purpose of improving production efficiency and output can be achieved through the setting of the growth regulation module.

[0019] The details of other functions and embodiments of the present application are described below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a schematic diagram of an embodiment of the microalgae cultivation system of the present application;

[0022] Figure 2 It is a schematic diagram of the oxygen removal and dead algae separation module used in this application. DETAILED DESCRIPTION

[0023] The following is an explanation of the implementation of the "composite microalgae cultivation system" disclosed in the present application through specific embodiments. Those skilled in the art can understand the advantages and effects of the present application from the contents disclosed in this specification. The present application can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present application. In addition, the drawings of the present application are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical content of the present application in detail, but the disclosed content is not intended to limit the scope of protection of the present application. In addition, the term "or" used in this article may include any one or more combinations of the associated listed items depending on the actual situation.

[0024] See Figures 1 to 2 FIG. 1 shows a specific embodiment of the microalgae cultivation system of the present application, which includes: a photosynthetic reaction module 10 , a growth regulation module 20 , a harvesting module 30 , a pressurized conveying device 40 , an oxygen removal and dead algae separation module 50 , and an air extraction device 60 .

[0025] The photosynthetic reaction module 10 defines an inlet 101 and an outlet 102. The photosynthetic reaction module 10 includes a transparent optical tube 11 and a light source device 13. The water inlet of the transparent optical tube 11 is located at the inlet 101, and the water outlet is located at the outlet 102. The transparent optical tube 11 is made of a transparent tube (e.g., a glass tube or acrylic tube). Culture medium for culturing microalgae can enter the transparent optical tube 11 from the inlet 101 and flow through the transparent optical tube 11 at a steady rate. The microalgae in the culture medium undergo photosynthesis within the transparent optical tube 11, obtaining nutrients and growing.

[0026] Specifically, the optically transparent tube 11 of the present application is a zigzag-shaped or spiral-shaped tube, thereby increasing its effective length and reducing the space and land area occupied by the tube. Furthermore, the optically transparent tube 11 is positioned substantially perpendicular to the ground, with an inlet 101 at its upper end and an outlet 102 at its lower end. This allows the culture medium within the optically transparent tube 11 to flow from the inlet 101 to the outlet 102 via gravity.

[0027] An auxiliary opening 12 can also be provided at the upper end of the optically transparent tube 11. The auxiliary opening 12 is used for the operator to add new culture solution or nutrients required for cultivating algae, or to inject carbon dioxide into the optically transparent tube 11 to supply the gas required for microalgae to perform photosynthesis. In addition, the photosynthetic reaction module 10 can also be provided with a plurality of light source devices 13. The light source devices 13 can be dimmable LED light-emitting devices, and can generate light of different wavelengths according to the requirements of the microalgae species to be cultivated, so as to enhance the photosynthesis of the microalgae. In addition, the photosynthetic reaction module 10 of the present application can also be provided with a temperature control device (not shown in the figure). The temperature control device can be a heater, a cooler, or a sprinkler device, etc., to control the temperature of the culture solution in the photosynthetic reaction module 10 to create an environment suitable for the growth of microalgae.

[0028] The growth regulation module 20 is connected to the outlet port 102 of the photosynthetic reaction module 10. The culture fluid from the photosynthetic reaction module 10 enters the growth regulation module 20. By controlling the flow rate of the culture fluid in the growth regulation module 20 and reducing or stopping photosynthesis, the microalgae in the culture fluid can undergo a growth regulation process in the growth regulation module 20 in an environment with a lower intensity than the photosynthetic reaction in the photosynthetic reaction module 10.

[0029] The growth regulation module 20 comprises a regulation tank 21 and a plurality of first and second baffles 22 and 23 disposed within the regulation tank 21. In this embodiment, the regulation tank 21 is a rectangular tank body, which can be either closed or open. The regulation tank 21 defines an inlet end 201 and an outlet end 202 at both ends of the longitudinal axis. The inlet end 201 of the regulation tank 21 is connected to the outlet end 102 of the photosynthetic reaction module 10 via a pipeline. The culture fluid can enter the regulation tank 21 from the inlet end 201 and then be discharged from the outlet end 202 of the regulation tank 21.

[0030] The plurality of first baffles 22 and second baffles 23 are arranged within the regulating tank 21 in a staggered and spaced-apart manner along the longitudinal axis of the regulating tank 21. Together, the plurality of first baffles 22 and the plurality of second baffles 23 divide the interior of the regulating tank 21 into a curved flow channel 24. More specifically, in this embodiment, the plurality of first baffles 22 are substantially perpendicular to the longitudinal axis of the regulating tank 21. One of two opposing sides of the plurality of first baffles 22 abuts against one of the inner side walls of the regulating tank 21, while the other side of the plurality of first baffles 22 maintains a distance from the other side wall of the regulating tank 21 or has an opening therein, forming a first notch 221 through which the culture medium can pass. The plurality of second baffles 23 are disposed between every two adjacent first baffles 22. Of the two opposing sides of the plurality of second baffles 23, one side corresponding to the first notch 221 is in close contact with the inner wall of the regulating tank 21, while the other side corresponding to the first notch 221 is spaced apart from the inner wall of the regulating tank 21 or has an opening, forming a second notch 231 through which water can flow. Therefore, through this arrangement, the space within the regulating tank 21 is partitioned by the plurality of first baffles 22 and second baffles 23 to form a zigzag-shaped curved flow channel 24. This increases the distance the culture fluid flows within the regulating tank 21 and slows down the flow rate of the culture fluid, thereby extending the time the culture fluid remains within the regulating tank 21.

[0031] The growth regulating module 20 is provided with a temperature control device 28 at the inlet end 201. The temperature control device 28 can be a heat exchanger, which can regulate the temperature of the culture liquid entering the regulating tank 21 so that the temperature of the algae in the regulating tank 21 is suitable for algae growth.

[0032] The growth regulation module 20 is also equipped with a light control device 27 for controlling the amount of light irradiating the growth regulation module 20, thereby controlling the intensity of the photosynthetic reaction experienced by the algae within the regulation tank 21, or even completely isolating the light to halt the algae's photosynthetic reaction. In this embodiment, the top of the regulation tank 21 is open, allowing light to penetrate the tank from above. The light control device 27 is a sunshade provided above the regulation tank 21 and is capable of controlling the area of ​​light irradiated above the regulation tank 21, thereby achieving the purpose of controlling the light intensity of the growth regulation module 20.

[0033] The growth regulation module 20 cooperates with the temperature control device 28 and the light control device 27 to adjust the light intensity and temperature in the regulation tank 21 suitable for the algae growth regulation process according to the characteristics of the algae.

[0034] The growth regulation module 20 of the microalgae cultivation system of the present application further comprises a growth monitoring device 29 and a diverter device 25. The growth monitoring device 29 is disposed at the outlet 202 of the growth regulation module 20 and is used to monitor the growth of algae within the growth regulation module 20. The diverter device 25 is disposed between the growth regulation module 20 and the harvesting module 30. The diverter device 25 is connected to a return pipe 26 and is connected to the inlet 101 of the photosynthetic reaction module 10 through the return pipe 26. The diverter device is configured to control the culture solution within the growth regulation module 20 to selectively flow into the harvesting module 30 or to flow back to the inlet 101 of the photosynthetic reaction module 10 through the return pipe 26.

[0035] The microalgae cultivation system of the present application uses a growth monitoring device 29 to detect the growth conditions of algae (e.g., algae size, concentration, color, etc.) in the culture medium within the growth regulation module 20. When the algae growth conditions meet the harvestable standard, the diverter device 25 controls the culture medium to flow into the harvesting module 30, where the algae in the culture medium are harvested. Alternatively, if the growth monitoring device 29 detects that the algae growth conditions within the regulation tank 21 do not meet the harvestable standard, the diverter device 25 controls the culture medium to flow back into the photosynthetic reaction module 10 through the reflux pipe 26, allowing the algae in the culture medium to resume photosynthesis within the photosynthetic reaction module until the algae growth conditions meet the harvestable standard and then be harvested.

[0036] Specifically, the microalgae cultivation system of the present application can adjust the light exposure level (including the light provided by the light source device 13 and the sum of natural light) of the photosynthetic reaction module 10 to a level close to the saturation level of light exposure that the algae can withstand, based on the characteristics of the cultivated algae. This allows the algae to undergo high-intensity photosynthesis, resulting in rapid division and growth. Furthermore, after the culture fluid enters the growth regulation module 20 from the photosynthetic reaction module 10, the intensity of the photosynthetic reaction experienced by the algae is reduced, or even stopped, and the culture fluid flows slowly within the growth regulation module 20. This allows the algae ample time to digest the nutrients produced by the high-intensity photosynthetic reaction within the photosynthetic reaction module 10, allowing them to grow to a critical size before further growth, division, and reproduction, thereby improving the yield and efficiency of the microalgae cultivation system of the present application.

[0037] In addition, the volume of the regulation tank 21 of the growth regulation module 20 is configured to be larger than the volume of the photosynthetic reaction module 10, and by setting a partition, the culture liquid can flow at a slow speed in the regulation tank 21. Therefore, the growth regulation module 20 can serve as a buffer space after the culture liquid is discharged from the photosynthetic reaction module 10, and expand the growth volume of the algae, thereby overcoming the disadvantage of insufficient volume of the traditional coil-type photosynthetic reactor.

[0038] The harvesting module 30 is connected to the outlet of the growth regulating module 20. An outlet pipe 241 is provided at the outlet 202 of the growth regulating module 20. The culture fluid discharged from the outlet pipe 241 can pass through the harvesting module 30, where a portion of the microalgae in the culture fluid can be harvested. In this embodiment, the harvesting module 30 comprises a filter assembly 31 and a culture fluid receiving tank 32. The culture fluid can pass through the filter assembly 31 and then enter the culture fluid receiving tank 32. The filter assembly 31 has pores of appropriate size, allowing microalgae in the culture fluid that are larger than the pore diameter of the filter assembly 31 to be intercepted by the filter assembly 31. Therefore, as the culture fluid passes through the filter assembly 31, a portion of the larger microalgae in the culture fluid can be harvested, while the remaining smaller microalgae enter the culture fluid receiving tank 32 along with the culture fluid.

[0039] Specifically, the harvesting module 30 of the present application harvests only a certain percentage of the microalgae in the culture medium during the harvesting process. This allows a portion of the microalgae to remain in the culture medium after passing through the harvesting module 30. This allows the remaining microalgae to regrow when the culture medium is recirculated into the photosynthetic reaction module 10. Furthermore, by controlling the concentration of the microalgae in the culture medium through the harvesting module 30, environmental conditions suitable for microalgae growth can be created, thereby improving the production efficiency and quality of the microalgae produced by the microalgae cultivation system of the present application.

[0040] The harvesting module 30 of the present application can achieve the purpose of controlling the harvesting ratio of microalgae by controlling the time ratio of the culture solution passing through the filter assembly 31 or not passing through the filter assembly 31, for example: Figure 1 In the illustrated embodiment, the filter assembly 31 of the harvesting module 30 is movable. When the filter assembly 31 is placed in the culture fluid receiving tank 32, the culture fluid will pass through the filter assembly 31, allowing the microalgae to be harvested. When the filter assembly 31 is moved outside the culture fluid receiving tank 32, the culture fluid will not pass through the filter assembly 31, and the microalgae in the culture fluid will not be harvested by the filter assembly 31. Therefore, by controlling the ratio of time the filter assembly 31 is placed in the culture fluid receiving tank 32 and when it is removed from the culture fluid receiving tank 32, the purpose of controlling the harvest ratio of microalgae in the culture fluid can be achieved.

[0041] However, the present application is not limited thereto. The harvesting module 30 of the present application can also control the harvesting ratio of microalgae through other means, such as by adjusting the pore size of the filter assembly 31. More specifically, because the pores of the filter assembly 31 are of a certain size, only microalgae larger than the pores of the filter assembly 31 are intercepted by the filter assembly 31. Therefore, the present application can achieve the purpose of controlling the harvesting ratio by selecting a filter assembly 31 with an appropriate pore size.

[0042] The pressurized conveying device 40 is connected to the outlet end of the harvesting module 30 and is used to convey the culture fluid discharged from the harvesting module 30 into the oxygen removal and dead algae separation module 50. The pressurized conveying device 40 is a pressure pump and has an inlet pipe 41 connected to the outlet of the culture fluid receiving tank 32 of the harvesting module 30, and is connected to the oxygen removal and dead algae separation module 50 through an outlet pipe 42.

[0043] The oxygen removal and dead algae separation module 50 is connected to the outlet pipe 42 of the pressurized conveying device 40. The culture fluid discharged from the harvesting module 30 is pressurized by the pressurized conveying device 40 and then transported into the oxygen removal and dead algae separation module 50. The oxygen removal process is performed within the oxygen removal and dead algae separation module 50 to reduce the oxygen content in the culture fluid. In this embodiment, the oxygen removal and dead algae separation module 50 includes an atomizing exhaust pipe 51 and a liquid collection pipe 52 connected below the atomizing exhaust pipe 51. The atomizing exhaust pipe 51 is cylindrical in shape, with an atomizing nozzle 53 disposed on one side. An oxygen removal pipe 54 is disposed in the center of the atomizing exhaust pipe 51, and a hollow pipe 55 is sleeved on the outside of the oxygen removal pipe 54. The oxygen removal pipe 54 and the hollow pipe 55 extend through the center of the atomizing exhaust pipe 51. The upper end of the oxygen exhaust pipe 54 is located at the upper end of the atomizing exhaust cylinder 51. The bottom of the oxygen exhaust pipe 54 extends to below the opening of the liquid collecting cylinder 52 and forms an expansion portion 541 for collecting oxygen discharged from the culture medium in the liquid collecting cylinder 52. The upper end of the hollow tube 55 extends to the outside of the upper end of the atomizing exhaust cylinder 51, and the lower end opening extends to a position between the upper part of the liquid collecting cylinder 52 and the lower part of the atomizing nozzle 53.

[0044] The atomizing nozzle 53 is connected to the outlet pipe 42 of the pressurized conveying device 40, so that the culture liquid can enter the atomizing nozzle 53 through the outlet pipe 42 and be input into the atomizing exhaust pipe 51 from the atomizing nozzle 53. In this embodiment, the atomizing nozzle 53 forms a nozzle, and the central axis of the atomizing nozzle 53 is parallel to the tangent direction of the circumferential cross-section of the atomizing exhaust pipe 51, or forms an angle less than 90 degrees. Therefore, the flow rate of the culture liquid is accelerated when passing through the atomizing nozzle 53, and it enters the atomizing exhaust pipe 51 in a spray or jet state. In addition, because the culture liquid sprayed from the atomizing nozzle 53 hits the side wall of the hollow pipe 55, the culture liquid is atomized to form floating liquid particles, thereby allowing the dead algae in the culture liquid to float into the atomizing exhaust pipe 51.

[0045] After the culture fluid is sprayed into the atomizing exhaust cylinder 51, oxygen and other gases contained in the culture fluid can flow out of the atomizing exhaust cylinder 51 through the oxygen exhaust pipe 54. Due to gravity, the liquid flows into the liquid collection cylinder 52 below the atomizing exhaust cylinder 51. The openings at the upper ends of the oxygen exhaust pipe 54 and the hollow tube 55 are connected to the exhaust device 60, which generates a vacuum to extract the gas discharged from the oxygen exhaust pipe 54 and the dead algae floating in the atomizing exhaust cylinder 51. In this embodiment, the exhaust device 60 includes a blower 61, an intake pipe 62 connected to both ends of the blower 61, and an exhaust pipe 63. One end of the exhaust pipe 63 is connected to the openings of the oxygen exhaust pipe 54 and the hollow tube 55, and the outlet of the exhaust pipe 63 is connected to a collection container 64. The exhaust device 60 functions to extract oxygen from the atomizing exhaust cylinder 51 and to remove dead algae in the culture fluid from the atomizing exhaust cylinder 51. During the microalgae cultivation process, some of the microalgae will die. Since the dead microalgae have a lighter specific gravity, when the exhaust device 60 extracts the gas inside the atomizing exhaust cylinder 51, the dead algae in the culture medium will also be extracted with the air flow and discharged from the exhaust pipe 63 into the collection container 64.

[0046] Therefore, the atomizing exhaust pipe 51 and the exhaust device 60 can reduce the amount of dead algae in the culture medium, thereby preventing the dead algae from adhering to the pipe or the flow channel of the regulating tank 21 and causing blockage, and ensure that the produced algae products will not have the stench caused by dead algae, and the products will have the aromatic smell of natural algae, thereby achieving the purpose of improving product quality.

[0047] The liquid collecting cylinder 52 is connected to the bottom of the atomizing exhaust cylinder 51 to accommodate the culture solution flowing down from the atomizing exhaust cylinder 51. A side exhaust port 521 is provided on one side of the upper end of the liquid collecting cylinder 52. In addition to being used for exhaust, the side exhaust port 521 can also be used for the operator to replenish or add culture solution. The bottom of the liquid collecting cylinder 52 is connected to the bottom of the buffer tank 56 through a connecting pipe 57, so that the culture solution in the liquid collecting cylinder 52 flows into the buffer tank 56 through the connecting pipe 57. The buffer tank 56 serves as a buffer space for the culture solution to enter the photosynthetic reaction module 10. The culture solution flowing out of the oxygen exhaust and dead algae separation module 50 first enters the buffer tank 56, and then enters the photosynthetic reaction module 10 through the buffer tank 56, so that the microalgae in the culture solution can resume photosynthesis. In particular, the microalgae cultivation system of the present application can not only inject new culture fluid through the auxiliary opening 12 at the upper end of the transparent optical tube 11, but also inject or add new culture fluid from the side exhaust port 521 of the liquid collection cylinder 52, or add new culture fluid from the harvesting module 30.

[0048] [Beneficial Effects of Embodiments]

[0049] The main feature of the microalgae cultivation system and method of the present application is that after the photosynthetic reaction process in the microalgae cultivation process is completed, the growth regulation module can cool down and moderate or stop the photosynthetic reaction of the microalgae in the culture medium. This allows the algae sufficient time to digest the nutrients generated by photosynthesis, allowing the algae to further grow and divide, thereby achieving the purpose of improving production efficiency.

[0050] Furthermore, through the above configuration, the algae can enter the growth regulation module before reaching the light saturation state and grow in a low-intensity photosynthetic reaction environment. Therefore, there is no need to reduce the photosynthetic reaction intensity of the photosynthetic reaction module in order to avoid the algae reaching the light saturation state.

[0051] Furthermore, the microalgae cultivation system of the present application can remove the dead algae from the culture medium through an exhaust device if dead algae are produced in the culture medium, so that the produced algae products will not have the foul odor produced by the dead algae, and the products will have the aromatic smell of natural algae, thereby achieving the purpose of improving product quality and overcoming the disadvantage of traditional open algae cultivation systems that the dead algae easily cause the product to have a foul smell.

[0052] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present application, and do not impose any form of limitation on the implementation methods of the technology of the present application. Any person skilled in the art may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present application, but they should still be regarded as technologies or embodiments that are essentially the same as those of the present application.

Claims

1. A composite microalgae cultivation system, characterized in that: The composite microalgae cultivation system comprises: A photosynthetic reaction module comprising a translucent optical tube and a light source device; the photosynthetic reaction module can define an inlet and an outlet, wherein a culture solution for culturing microalgae enters the translucent optical tube from the inlet and is discharged from the outlet; the light source device is adjacent to the translucent optical tube and can adjust the intensity and wavelength of the output light to provide the light required for the algae in the culture solution in the translucent optical tube to perform photosynthetic reactions; A growth regulation module comprising an adjustment tank, and a plurality of first baffles and a plurality of second baffles disposed within the adjustment tank, wherein the adjustment tank defines an inlet end and an outlet end at both ends along a longitudinal axis, and wherein the plurality of first baffles and the plurality of second baffles are disposed within the adjustment tank in a staggered and spaced manner along the longitudinal axis, thereby dividing the interior of the adjustment tank into a curved flow channel connecting the inlet end and the outlet end; a harvesting module connected to the outlet of the growth regulating module and configured to execute a harvesting process to harvest a portion of the microalgae in the culture solution; a growth monitoring device, disposed at the outlet of the growth regulating module, for monitoring the growth of algae in the growth regulating module; a diverter device, disposed between the growth regulating module and the harvesting module, the diverter device being connected to a return pipe and connected to the inlet end of the photosynthetic reaction module through the return pipe; the diverter device being configured to control the culture solution in the growth regulating module to selectively flow into the harvesting module, or to flow back to the inlet end of the photosynthetic reaction module through the return pipe; and a pressurized conveying device connected to the outlet end of the harvesting module and used to re-transport the culture fluid discharged from the harvesting module into the inlet end of the photosynthetic reaction module; The microalgae cultivation system is configured such that the culture fluid for cultivating algae first undergoes a photosynthetic growth process within the photosynthetic reaction module and then flows into the growth regulation module through a pipeline. The growth monitoring device detects the growth status of the algae in the culture fluid within the regulation tank of the growth regulation module. When the growth status of the algae in the regulation tank reaches a harvestable standard, the diverter device controls the culture fluid to flow into the harvesting module. The harvesting module harvests the algae in the culture fluid, and then the pressurized conveying device re-transports the culture fluid after the algae are harvested in the harvesting module to the inlet of the photosynthetic reaction module. Alternatively, when the growth monitoring device detects that the growth status of the algae in the regulation tank does not meet the harvestable standard, the diverter device controls the culture fluid to flow back to the inlet of the photosynthetic reaction module through the reflux pipe, allowing the algae in the culture fluid to photosynthesize again within the photosynthetic reaction module.

2. The composite microalgae cultivation system according to claim 1, characterized in that: Also includes: An oxygen exhaust and dead algae separation module, the oxygen exhaust and dead algae separation module has an atomizing exhaust cylinder, and a liquid collecting cylinder connected to the lower end of the atomizing exhaust cylinder, one side of the atomizing exhaust cylinder is provided with an atomizing nozzle, the atomizing nozzle is connected to the pressurized conveying device, and the culture liquid is sprayed into the atomizing exhaust cylinder through the atomizing nozzle; an oxygen exhaust pipe and a hollow tube sleeved on the outside of the oxygen exhaust pipe are provided in the center of the atomizing exhaust cylinder; the upper end of the oxygen exhaust pipe extends to the upper end of the atomizing exhaust cylinder, and the bottom extends to the upper end of the liquid collecting cylinder; the upper end of the hollow tube extends to the outside of the upper end of the atomizing exhaust cylinder, and the lower end opening extends to a position between the upper part of the liquid collecting cylinder and the lower part of the atomizing nozzle; and an air extraction device connected to the oxygen exhaust pipe and above the hollow tube; The culture solution is sprayed into the atomizing exhaust pipe through the atomizing nozzle, so that the culture solution forms atomized liquid particles after being sprayed on the outside of the hollow tube, and the dead algae in the culture solution float in the atomizing exhaust pipe, and the oxygen and dead algae are extracted through the oxygen exhaust pipe and the hollow tube by the exhaust device.

3. The composite microalgae cultivation system according to claim 1, characterized in that: The regulation tank reduces or isolates light to slow down or stop the photosynthesis of the microalgae in the culture solution, allowing the algae in the regulation tank to grow in an environment with a lower photosynthetic reaction intensity than that of the photosynthetic reaction module. The volume of the regulation tank of the growth regulation module is equal to or greater than the volume of the photosynthetic reaction module, and the residence time of the culture solution in the growth regulation module is not less than the residence time of the culture solution in the photosynthetic reaction module.

4. The composite microalgae cultivation system according to claim 3, characterized in that: The growth regulating module further comprises a light control device for controlling the light irradiation intensity of the regulating tank, thereby reducing or stopping the photosynthesis intensity of the algae in the regulating tank.

5. The composite microalgae cultivation system according to claim 4, characterized in that: The adjustment slot is a slot body with light permeable on the upper side, and the light control device is a light-shielding curtain arranged above the adjustment slot.

6. The composite microalgae cultivation system according to claim 3, characterized in that: The growth regulating module further comprises a temperature control device arranged at the inlet end of the growth regulating module, which is used to control the temperature of the culture solution in the regulating tank.

7. The microalgae cultivation system according to claim 6, characterized in that: The temperature control device is a heat exchanger.

8. The composite microalgae cultivation system according to claim 1, characterized in that: The diversion device further comprises a reflux conveying device arranged in the reflux pipe.

9. The composite microalgae cultivation system according to claim 1, characterized in that: The harvesting module comprises a filter assembly and a culture fluid receiving tank. The culture fluid passes through the filter assembly, and part of the microalgae in the culture fluid is harvested through the filter assembly. The culture fluid passing through the filter assembly enters the culture fluid receiving tank.

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