Photobioreactor

Abstract

The invention provides a photobioreactor. The photobioreactor comprises a light-permeable container; the first light supplementing assembly is installed in the light-transmitting container and located in the middle of the light-transmitting container; the reaction tubes are used for containing microalgae suspension liquid, and the multiple reaction tubes surround the first light supplementing assembly and are installed on the light-permeable container; the plurality of second light supplementing assemblies are mounted on one side, back on to the first light supplementing assembly, of the reaction tube; and a controller; wherein the controller can receive the illumination intensity information of the surface of the reaction tube and send instructions to the first light supplementing assembly and the second light supplementing assembly to adjust the light supplementing intensity, so that the stability of the illumination environment in the reactor is maintained. When the external illumination condition changes, the controller controls the light supplementing assembly to adjust the light supplementing intensity according to the monitored illumination intensity change so as to maintain the stability of the whole illumination environment in the reactor.

Description

Technical Field

[0001] The present disclosure relates to the technical field of microalgae cultivation, and in particular to a photobioreactor. Background Art

[0002] As an important resource, microalgae are widely used in many industries such as food, medicine and cosmetics. A photobioreactor is a device that can be used to culture microalgae and their photosynthetic tissues or cells.

[0003] The microalgae photobioreactor currently available on the market injects a microalgae suspension into a reaction tube for photosynthesis. The diameter of the reaction tube is generally controlled within 30 cm so that all the microalgae in the reaction tube can perform photosynthesis. To ensure the cultivation efficiency of microalgae, a reactor usually includes multiple reaction tubes. Since multiple reaction tubes are easily blocked from each other and the external light conditions are greatly affected by environmental factors, it is easy to cause the microalgae in the reactor to be unstable under light, affecting the cultivation efficiency of the microalgae. Summary of the invention

[0004] A technical problem to be solved by the present disclosure is: how to form a stable lighting environment in a reactor to improve the photosynthesis efficiency of microalgae.

[0005] To solve the above technical problems, the embodiments of the present disclosure provide a photobioreactor, comprising: a light-permeable container; a first fill-light component, which is installed in the light-permeable container and is located in the middle of the light-permeable container; a reaction tube, which is used to contain a microalgae suspension, and a plurality of reaction tubes are installed in the light-permeable container around the first fill-light component; a plurality of second fill-light components, which are installed on the side of the reaction tube facing away from the first fill-light component; and a controller, which is signal-connected to the first fill-light component and the second fill-light component; wherein the controller is capable of receiving light intensity information on the surface of the reaction tube, and issuing instructions to the first fill-light component and the second fill-light component to adjust their fill-light intensities to maintain the stability of the lighting environment in the reactor.

[0006] In some embodiments, the light-permeable container includes a supporting tray and a light-permeable sleeve installed on the supporting tray, the first fill-light assembly includes a first lamp tube installed on the inner center of the supporting tray, a plurality of reaction tubes are installed on the supporting tray around the first lamp tube, and the second fill-light assembly includes a second lamp tube installed on the inner wall of the light-permeable sleeve.

[0007] In some embodiments, the extension directions of the reaction tube, the first lamp tube, and the second lamp tube are all parallel to the axial direction of the light-transmitting sleeve.

[0008] In some embodiments, the photobioreactor further comprises a driving assembly located outside the supporting tray, the supporting tray is provided with a through hole, one end of the reaction tube is connected to the driving assembly through the through hole and can rotate around the axis of its extension direction under the driving action of the driving assembly.

[0009] In some embodiments, the driving assembly includes a driving member, a driving gear located at the center of the supporting plate and connected to the driving member, and a plurality of driven gears surrounding and meshing with the driving gear. The plurality of driven gears are respectively fixed to the outer circumference of the plurality of reaction tubes to drive the reaction tubes to rotate under the drive of the driving gear.

[0010] In some embodiments, the photobioreactor further comprises a liquid inlet assembly and a liquid discharge assembly respectively connected to both ends of the reaction tube; wherein the liquid inlet assembly is located at one end of the light-transmitting sleeve away from the supporting tray, and the liquid discharge assembly is located on the outer side of the supporting tray facing away from the light-transmitting sleeve.

[0011] In some embodiments, the liquid inlet component includes a liquid inlet main pipe and multiple liquid inlet branch pipes connected to the liquid inlet main pipe, and the liquid inlet branch pipes are connected to the first end of the reaction tube; the liquid discharge component includes a liquid discharge valve arranged at the second end of the reaction tube, a liquid guide plate for guiding the multiple liquid discharge valves to discharge liquid, and a liquid discharge port arranged on the liquid guide plate.

[0012] In some embodiments, a cavity is provided in the wall of the light-transmitting sleeve, and a temperature-controlling liquid inlet and a temperature-controlling liquid outlet connected to the cavity are provided on the outer wall surface of the light-transmitting sleeve.

[0013] In some embodiments, the second fill light assembly also includes a reflective curtain arranged on the inner wall of the light-transmitting sleeve, and the reflective curtain has a storage state and an expanded state that can be switched between the storage state. In the storage state, external light can pass through the light-transmitting sleeve to illuminate the reaction tube. In the expanded state, the reflective curtain is fully spread on the inner wall of the light-transmitting sleeve to reflect the light emitted by the first lamp tube and the second lamp tube.

[0014] In some embodiments, the second fill light assembly also includes a roller capable of rolling circumferentially along the inner wall of the light-transmitting sleeve. One side of the reflective curtain is fixed to the inner wall of the light-transmitting sleeve, and the other side is connected to the roller so as to switch between a stored state and an unfolded state under the drive of the roller.

[0015] Through the above technical scheme, the photobioreactor provided by the present disclosure arranges multiple reaction tubes in a light-transmitting container in a ring, and sets a first fill light component on the inner side of the ring, and disperses multiple second fill light components on the outer side of the ring. The fill light components and external ambient light together constitute the overall lighting environment of the reaction tubes. When the external lighting conditions change, the controller controls the fill light components to adjust the fill light intensity according to the monitored light intensity changes to maintain the stability of the overall lighting environment in the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 The structure of the photobioreactor disclosed in the embodiment of the present disclosure is shown in FIG. Figure 1 ; Figure 2 The structure of the photobioreactor disclosed in the embodiment of the present disclosure is shown in FIG. Figure 2 ; Figure 3 is a schematic diagram of a partial structure of the bottom of a display device disclosed in an embodiment of the present disclosure; Figure 4 is a schematic diagram of the structure of the device disclosed in the embodiment of the present disclosure after being flipped; Figure 5 is a schematic diagram of the structure of the device disclosed in the embodiment of the present disclosure after being turned over and the liquid guide plate is omitted; Figure 6 It is a schematic diagram of the structure of the embodiment of the present disclosure in which the liquid inlet component is omitted; Figure 7 is a schematic diagram of a partial structure showing the interior of a light-transmitting container disclosed in an embodiment of the present disclosure; Figure 8 is a top view schematic diagram showing a second fill light component and a light-transmitting sleeve in a storage state of the reflective curtain disclosed in an embodiment of the present disclosure; Fig. 9 yes Figure 8 A partial enlarged view of Fig.10 It is a top view schematic diagram showing a second fill light component and a light-transmitting sleeve when the reflective curtain disclosed in an embodiment of the present disclosure is in an unfolded state.

[0018] Description of reference numerals: 1. light-permeable container; 101. supporting tray; 102. light-permeable sleeve; 103. inlet for temperature-adjusting liquid; 104. outlet for temperature-adjusting liquid; 105. supporting leg; 106. handle; 107. embedded groove; 2. first fill-light assembly; 201. first lamp tube; 3. reaction tube; 4. second fill-light assembly; 401. second lamp tube; 402. reflective curtain; 403. roller; 404. embedded block; 405. accommodating chamber; 5. driving assembly; 501. driving member; 502. driving gear; 503. driven gear; 504. driving member bracket; 6. liquid inlet assembly; 601. liquid inlet main pipe; 602. liquid inlet branch pipe; 603. cover plate; 7. liquid discharge assembly; 701. liquid discharge valve; 702. liquid guide plate; 703. liquid discharge outlet. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0020] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0021] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0022] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0023] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0024] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0025] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0026] like Figure 1-Figure 10 As shown, the present disclosure provides a photobioreactor, comprising: a light-permeable container 1; a first fill-light component 2, which is installed in the light-permeable container 1 and located in the middle of the light-permeable container 1; a reaction tube 3, which is used to contain a microalgae suspension, and a plurality of reaction tubes 3 are installed in the light-permeable container 1 around the first fill-light component 2; a plurality of second fill-light components 4, which are installed on the side of the reaction tube 3 facing away from the first fill-light component 2; and a controller, which is signal-connected to the first fill-light component 2 and the second fill-light component 4; wherein the controller is capable of receiving light intensity information on the surface of the reaction tube 3, and issuing instructions to the first fill-light component 2 and the second fill-light component 4 to adjust their fill-light intensities, so as to maintain the stability of the light environment in the reactor.

[0027] Specifically, the external ambient light passes through the container wall of the light-permeable container 1 to form a basic lighting environment inside the container. A first fill light component 2 capable of providing supplementary lighting is arranged in the middle of the light-permeable container 1, and multiple reaction tubes 3 are installed around the first fill light component 2, so that the light emitted by the first fill light component 2 can simultaneously illuminate the multiple reaction tubes 3, and then multiple second fill light components 4 are installed on the side of the reaction tube 3 facing away from the first fill light component 2, and the second fill light component 4 and the first fill light component 2 cooperate with each other to avoid the existence of a light blind spot on the surface of the reaction tube 3.

[0028] The supplementary lighting of the reaction tube 3 by the first fill light component 2 and the second fill light component 4 and the basic lighting of the ambient light together constitute the overall lighting received by the reaction tube 3. By adjusting the supplementary lighting by the controller, a more stable overall lighting environment that is more conducive to the growth of microalgae can be formed inside the reactor.

[0029] When using a photobioreactor to cultivate microalgae, a microalgae suspension is placed in a reaction tube 3, and the microalgae in the reaction tube 3 are in optimal lighting conditions. Due to the different types of microalgae, different growth cycles, and different growth stages of the same batch of microalgae. Therefore, the optimal lighting conditions required by the microalgae in the reaction tube 3 are constantly changing, and the basic lighting included in the overall lighting will also be affected by environmental factors and constantly change. When the overall lighting does not meet the optimal lighting conditions for the current growth of microalgae, the controller issues an instruction to adjust the fill light intensity of the first fill light component 2 and the second fill light component 4, so that the overall lighting can be close to or equal to the optimal lighting conditions, providing better growth conditions for the microalgae, and effectively improving the cultivation efficiency of the microalgae. The controller here can be a common controller such as a digital signal processor or a microcontroller connected to a photometer to complete the reception, processing and transmission of signals. In other embodiments, a light intensity sensor or photoresistor connected to the controller signal can also be set on the surface of the reaction tube 3.

[0030] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, in some embodiments, the light-permeable container 1 includes a supporting tray 101 and a light-permeable sleeve 102 installed on the supporting tray 101, the first fill light component 2 includes a first lamp tube 201 installed on the inner center of the supporting tray 101, a plurality of reaction tubes 3 are installed on the supporting tray 101 around the first lamp tube 201, and the second fill light component 4 includes a second lamp tube 401 installed on the inner wall of the light-permeable sleeve 102.

[0031] Specifically, the light-transmitting sleeve 102 is installed above the supporting tray 101, and the two cooperate to form a storage space for the light-transmitting container 1, and the first lamp tube 201 is installed on the supporting tray 101 toward the inner center of the storage space. With the first lamp tube 201 as the center, multiple reaction tubes 3 are installed on the supporting tray 101 around the first lamp tube 201 to form a small ring structure, and multiple second lamp tubes 401 are installed on the inner wall of the light-transmitting sleeve 102 around the first lamp tube 201 to form a large ring structure surrounding the above-mentioned small ring structure, such as Figure 7 As shown, in order to ensure the fill light effect and reduce the shielding of the second lamp tube 401 to the external light, the number of the second lamp tube 401 and the reaction tube 3 is the same, and the reaction tube 3 and the corresponding second lamp tube 401 are distributed along the radial direction of the above-mentioned annular structure. The first lamp tube 201 and the plurality of second lamp tubes 401 work together to avoid the existence of blind spots on the surface of the reaction tube 3 located in the accommodation space, so as to provide an overall lighting environment suitable for the growth of microalgae. The first lamp tube 201 and the second lamp tube 401 here can adopt LED growth lamps with customizable spectrum, which can provide microalgae with specific wavelengths of light to accelerate the cultivation efficiency while adjusting the fill light intensity. In other embodiments, ordinary LED lamps or fluorescent lamps and other lamps close to natural light can also be used.

[0032] like Fig. 9 As shown, in some embodiments, an embedding groove 107 is provided on the inner wall of the light-transmitting sleeve 102, and the second fill light component 4 also includes an embedding block 404 connected to the second lamp tube 401, and the second lamp tube is detachably installed in the embedding groove 107 through the embedding block 404, so that the staff can adjust the position and number of the second lamp tubes 401 in the light-transmitting sleeve 102.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the photobioreactor can be stably placed by a plurality of legs 105 arranged on the periphery of the supporting tray 101, and a handle 106 is installed on the outer wall of the light-transmitting sleeve 102 to facilitate the staff to carry the photobioreactor to a location with suitable light.

[0034] In other embodiments, in addition to the cylindrical light-transmitting sleeve 102 of this embodiment, the light-transmitting container 1 may also be a spherical or square container or other forms of light-transmitting cover, provided that the light distribution in the accommodation space is uniform.

[0035] like Figure 6 and Figure 7 As shown, in some embodiments, the extension directions of the reaction tube 3 , the first lamp tube 201 , and the second lamp tube 401 are all parallel to the axial direction of the light-transmitting sleeve 102 .

[0036] Specifically, the reaction tube 3 and the first lamp tube 201 and the second lamp tube 401 are all arranged parallel to the axial direction of the light-transmitting sleeve 102, so that at each axial position, the spacing between the reaction tube 3 and the first lamp tube 201 and the second lamp tube 401 is equal, thereby avoiding uneven lighting. In addition, multiple reaction tubes 3 and multiple second lamp tubes 401 are evenly distributed with the first lamp tube 201 as the center, thereby further improving the uniformity of the overall lighting environment inside the light-transmitting container 1.

[0037] In some embodiments, the first lamp tube 201 is divided into a plurality of first lamp tube segments along its own extension direction, and the second lamp tube 401 is divided into a plurality of second lamp tube segments along its own extension direction, and the controller can adjust the supplementary light intensity of the first lamp tube segment and the second lamp tube segment respectively. Since the photobioreactor is usually placed vertically when cultivating microalgae, the microalgae become heavier in the later stage of cultivation, and a large amount of microalgae are easy to settle in the lower half of the reaction tube 3. The controller controls the first lamp tube segment and the second lamp tube segment at the corresponding position to strengthen the supplementary light intensity, so as to maintain the cultivation efficiency of the microalgae settled in the lower half of the reaction tube 3.

[0038] like Figures 1 to 5As shown, in some embodiments, the photobioreactor also includes a driving assembly 5 located outside the supporting tray 101, and the supporting tray 101 is provided with a through hole. One end of the reaction tube 3 is connected to the driving assembly 5 through the through hole and can rotate around the axis of its extension direction under the driving action of the driving assembly 5.

[0039] Specifically, one end of the reaction tube 3 extends out of the accommodation space of the light-transmitting container 1 through the through hole on the supporting tray 101, and the driving component 5 is installed on the outer side of the supporting tray 101 facing away from the accommodation space. Since the positions of the first fill light component 2 and the second fill light component 4 in the light-transmitting container 1 are relatively fixed, it is difficult to provide a completely uniform lighting environment in the accommodation space. Therefore, the driving component 5 drives the reaction tube 3 to rotate around the axis of its own extension direction, so as to further improve the light conditions of the microalgae.

[0040] In some embodiments, the controller can control the driving assembly 5 to drive the reaction tube 3 to accelerate or decelerate rotation, so as to reduce the phenomenon of microalgae adhering to the wall, improve the light transmittance of the surface of the reaction tube 3, and accelerate the culture efficiency.

[0041] In some embodiments, since photosynthesis includes light reaction and dark reaction, the growth of microalgae is affected by the light-dark cycle. The controller adjusts the rotation cycle of the driving component 5 and the light intensity of the supplementary light component, applies intermittent light to the microalgae in the reaction tube 3, controls the time and intensity of the light, and gives the microalgae an appropriate rest period to promote its healthy growth. The microalgae in the reaction tube 3 can receive light at different time periods, which also reduces the risk of growth stagnation or death of microalgae caused by long-term direct light, effectively avoids the occurrence of light inhibition, and provides a more suitable growth environment for microalgae. Light inhibition here refers to the phenomenon that the photosynthesis of plants or algae decreases under excessive light conditions.

[0042] like Figures 1 to 5 As shown, in some embodiments, the driving assembly 5 includes a driving member 501, a driving gear 502 located at the center of the supporting tray 101 and connected to the driving member 501, and a plurality of driven gears 503 surrounding and meshing with the driving gear 502. The plurality of driven gears 503 are respectively fixed to the outer peripheries of the plurality of reaction tubes 3 to drive the reaction tubes 3 to rotate under the drive of the driving gear 502.

[0043] Specifically, the driving gear 502 is installed at the outer center of the supporting plate 101, and a plurality of driven gears 503 meshing therewith are respectively fixed on the outer peripheries of the ends of the plurality of reaction tubes 3 extending out of the accommodation space, such as Figure 5As shown, a driving member bracket 504 for placing a driving member 501 is also installed on the outer side of the supporting plate 101. When the driving gear 502 rotates under the drive of the driving member 501, it can drive multiple driven gears 503 to rotate at the same time, that is, drive multiple reaction tubes 3 to rotate around the axis of their own extension direction. The driving member 501 drives multiple reaction tubes 3 to rotate at the same time through a driving gear 502, so that the multiple reaction tubes 3 maintain the same rotation speed, thereby improving the consistency of the products cultured in the reactor. The driving member 501 here can adopt a driving motor. In other embodiments, the driving component 5 can also drive multiple reaction tubes 3 to rotate respectively through multiple sets of relatively independent driving members and transmission members to strengthen the control ability of the microalgae culture process, so that the device can be used to study the impact of reaction tube rotation on microalgae culture.

[0044] like Figures 1 to 4 as well as Figure 6 As shown, in some embodiments, the photobioreactor further includes a liquid inlet assembly 6 and a liquid discharge assembly 7 respectively connected to the two ends of the reaction tube 3; wherein the liquid inlet assembly 6 is located at one end of the light-transmitting sleeve 102 away from the supporting tray 101, and the liquid discharge assembly 7 is located on the outer side of the supporting tray 101 facing away from the light-transmitting sleeve 102.

[0045] Specifically, a liquid inlet assembly 6 is arranged on the side of the light-transmitting sleeve 102 away from the supporting tray 101, that is, on the top of the light-transmitting container 1, and a liquid discharge assembly 7 is arranged on the outer side of the supporting tray 101 facing away from the light-transmitting sleeve 101, that is, on the bottom of the light-transmitting container 1. The reactor is placed vertically, and the microalgae suspension can enter and discharge the reaction tube 3 from top to bottom, which is convenient for personnel operation.

[0046] like Figures 1 to 4 as well as Figure 6 As shown, in some embodiments, the liquid inlet component 6 includes a liquid inlet main pipe 601 and a plurality of liquid inlet branch pipes 602 connected to the liquid inlet main pipe 601, and the liquid inlet branch pipes 602 are connected to the first end of the reaction tube 3; the liquid discharge component 7 includes a liquid discharge valve 701 arranged at the second end of the reaction tube 3, a liquid guide plate 702 for guiding the plurality of liquid discharge valves 701 to discharge liquid, and a liquid discharge port 703 arranged on the liquid guide plate 702.

[0047] Specifically, when using the device to cultivate microalgae, the staff injects the microalgae suspension into the liquid inlet main pipe 601, and the microalgae suspension enters each reaction tube 3 through multiple liquid inlet branches 602. When the cultivation is completed, the staff opens the drain valve 701 located at the second end of the reaction tube 3, and the microalgae suspension flows out of the reaction tube 3 under the action of gravity, and flows into the drain port 703 with the help of the liquid guide plate 702. The staff collects the microalgae products after the cultivation at the drain port 703. Among them, the liquid guide plate 702 is set to a funnel shape, and the drain port 703 is set at the lowest point of the liquid guide plate 702, which is convenient for collecting the microalgae suspension that has been cultivated in multiple reaction tubes 3.

[0048] In some embodiments, the drain valve 701 seals the reaction tube 3 located inside the support tray 101 so that the microalgae suspension that has been cultured will not flow downward out of the illumination space, thereby improving the stability of the product produced by the reactor.

[0049] In some embodiments, the liquid inlet assembly 6 also includes a cover plate 603 for sealing the end of the light-transmitting sleeve 102. The cover plate 603 cooperates with the supporting tray 101 and the light-transmitting sleeve 102 to form a closed accommodating space, forming a closed design that can effectively isolate the external environment and reduce internal air flow. At the same time, it avoids dust from adhering to the outer surface of the reaction tube 3, prevents pollution, and provides a stable growth space for microalgae.

[0050] like Figure 1 and Figure 2 As shown, in some embodiments, a cavity is provided in the wall of the light-transmitting sleeve 102 , and a temperature-adjusting liquid inlet 103 and a temperature-adjusting liquid outlet 104 connected to the cavity are provided on the outer wall surface of the light-transmitting sleeve 102 .

[0051] Specifically, the staff can fill the cavity with liquid for stabilizing the temperature in the accommodation space through the temperature regulating liquid inlet 103 and the temperature regulating liquid outlet 104, so that the temperature in the accommodation space is always stable within a temperature range suitable for the growth of microalgae, thereby improving the cultivation efficiency of microalgae.

[0052] In some embodiments, a temperature sensor connected to the controller signal can be installed on the surface of the reaction tube 3. When the controller detects that the temperature in the containing space deviates from the suitable temperature required for the growth of microalgae, it will remind the staff to adjust the temperature to reduce the use of temperature regulating liquid.

[0053] In some embodiments, the reaction tube 3 is integrated with a pH meter, a temperature sensor, a light intensity sensor, and other devices that are connected to the controller signal and can monitor the culture environment parameters in real time. Various sensors and controllers together constitute a culture environment monitoring system to ensure that the microalgae are in the most suitable growth conditions, thereby improving the quality and consistency of the product.

[0054] like Figures 8 to 10 As shown, in some embodiments, the second fill light component 4 also includes a reflective curtain 402 arranged on the inner wall of the light-transmitting sleeve 102, and the reflective curtain 402 has a storage state and an expanded state that can be switched between the storage state. In the storage state, external light can pass through the light-transmitting sleeve 102 to illuminate the reaction tube 3. In the expanded state, the reflective curtain 402 is fully spread on the inner wall of the light-transmitting sleeve 102 to reflect the light emitted by the first lamp tube 201 and the second lamp tube 401.

[0055] Specifically, the reflective curtain 402 has a reflective coating facing the accommodation space, and in the unfolded state, the light emitted by the supplementary light assembly can only be reflected in the accommodation space, forming a closed illumination space. Generally, the reflective curtain 402 is in the storage state, and the basic illumination provided by the external ambient light and the supplementary illumination provided by the supplementary light assembly together constitute the overall illumination in the accommodation space. When there is a large gap between the basic illumination provided by the external ambient light and the optimal illumination conditions required by the microalgae, for example, the ambient light intensity at night is obviously insufficient, resulting in the basic illumination being significantly lower than the optimal illumination conditions required by the microalgae, or the illumination intensity of the ambient light is too large, and the microalgae enters the dark reaction stage in photosynthesis that does not require illumination, and the basic illumination is significantly higher than the optimal illumination conditions required by the microalgae, by switching the reflective curtain 402 to the unfolded state, a closed illumination space is formed in the light-transmitting container 1, avoiding the leakage of supplementary illumination while isolating the interference of external ambient light, and the supplementary illumination provided by the supplementary light assembly is the overall illumination, so that the reactor can still provide the microalgae with illumination conditions that are conducive to growth.

[0056] like Fig. 9 As shown, in some embodiments, the second fill light assembly 4 further includes a receiving cavity 405 located between the second lamp tube 401 and the embedding block 404 for receiving the reflective curtain 402 . In the received state, the reflective curtain 402 is received in the receiving cavity 405 .

[0057] In some embodiments, the reflective coating on the surface of the reflective curtain 402 may be roughened to increase the scattering effect of light after it hits the reflective curtain 402 , forming diffuse reflection in a closed illumination space and improving the uniformity of light in the space.

[0058] like Figures 8 to 10 As shown, in some embodiments, the second fill light component 4 also includes a roller 403 that can roll circumferentially along the inner wall of the light-transmitting sleeve 102. One side of the reflective curtain 402 is fixed to the inner wall of the light-transmitting sleeve 102, and the other side is connected to the roller 403 to switch between the stored state and the unfolded state under the drive of the roller 403.

[0059] Specifically, a plurality of second fill-light components 4 are distributed along the inner wall of the light-transmitting sleeve 102, each second fill-light component 4 is provided with a receiving cavity 405, and a roller 403 is installed on both sides of the receiving cavity 405 along the circumference of the wall. In the storage state, the rollers 403 are close to both sides of the receiving cavity 405, and the reflective curtain 402 is stored in the receiving cavity 405. When it is necessary to switch to the unfolded state, the rollers 403 are driven to roll along the circumference of the wall, driving the reflective curtain 402 to extend out of the receiving cavity 405. When the two rollers 403 between two adjacent second fill-light components 4 are in contact, the rollers 403 are stopped from being driven, and the reflective curtain 402 is fully spread between the two second fill-light components 4. The rollers 403 can be driven to roll by a motor, or they can be driven to roll manually to switch the state of the reflective curtain 402.

[0060] In some embodiments, a magnet may be provided between two rollers 403 that are in contact with each other in the unfolded state, so as to ensure that adjacent reflective curtains 402 can be closely fitted together in the unfolded state.

[0061] In some embodiments, Fig.10 As shown, the size of the reflective curtain 402 is larger than the axial size of the inner wall of the light-transmitting sleeve 102, so that in the unfolded state, the reflective curtain 402 can form a curved surface to increase the scattering of light in the space and improve the uniformity of illumination.

[0062] In some embodiments, circumferentially extending rolling tracks can be provided at both ends of the light-transmitting sleeve 102 along the axial direction, and the roller 403 can be installed on the rolling tracks. At the same time, a wheel axle for supporting the rotation of the roller 403 is installed between the two rollers 403, and the reflective curtain 402 is fixedly connected to the wheel axle to improve the stability during the switching state.

[0063] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0064] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A photobioreactor, characterized in that: include: A light-permeable container (1); A first fill-light component (2), the first fill-light component (2) being installed in the light-permeable container (1) and located in the middle of the light-permeable container (1); A reaction tube (3), the reaction tube (3) being used to contain a microalgae suspension, a plurality of the reaction tubes (3) being mounted on the light-permeable container (1) surrounding the first supplemental light component (2); A plurality of second fill-light components (4), wherein the plurality of second fill-light components (4) are mounted on a side of the reaction tube (3) facing away from the first fill-light component (2); as well as A controller, the controller being signal-connected to the first fill light component (2) and the second fill light component (4); The controller is capable of receiving light intensity information on the surface of the reaction tube (3), and sending instructions to the first fill light component (2) and the second fill light component (4) to adjust their fill light intensities, so as to maintain the stability of the lighting environment in the reactor.

2. The photobioreactor according to claim 1, characterized in that: The light-permeable container (1) comprises a supporting tray (101) and a light-permeable sleeve (102) mounted on the supporting tray (101); the first fill-light assembly (2) comprises a first lamp tube (201) mounted on the inner center of the supporting tray (101); a plurality of reaction tubes (3) are mounted on the supporting tray (101) around the first lamp tube (201); and the second fill-light assembly (4) comprises a second lamp tube (401) mounted on the inner wall of the light-permeable sleeve (102).

3. The photobioreactor according to claim 2, characterized in that: The extension directions of the reaction tube (3), the first lamp tube (201) and the second lamp tube (401) are all parallel to the axial direction of the light-transmitting sleeve (102).

4. The photobioreactor according to claim 2, characterized in that: The photobioreactor further comprises a driving assembly (5) located outside the supporting tray (101); the supporting tray (101) is provided with a through hole; one end of the reaction tube (3) is connected to the driving assembly (5) via the through hole and is capable of rotating around an axis in its extension direction under the driving action of the driving assembly (5).

5. The photobioreactor according to claim 4, characterized in that: The driving assembly (5) comprises a driving member (501), a driving gear (502) located at the center of the supporting plate (101) and connected to the driving member (501), and a plurality of driven gears (503) surrounding and meshing with the driving gear (502), wherein the plurality of driven gears (503) are respectively fixed to the outer peripheries of the plurality of reaction tubes (3) so as to drive the reaction tubes (3) to rotate under the drive of the driving gear (502).

6. The photobioreactor according to claim 2, characterized in that: The photobioreactor further comprises a liquid inlet assembly (6) and a liquid discharge assembly (7) respectively connected to two ends of the reaction tube (3); The liquid inlet assembly (6) is located at an end of the light-transmitting sleeve (102) away from the supporting tray (101), and the liquid discharge assembly (7) is located on the outer side of the supporting tray (101) facing away from the light-transmitting sleeve (102).

7. The photobioreactor according to claim 6, characterized in that: The liquid inlet assembly (6) comprises a liquid inlet main pipe (601) and a plurality of liquid inlet branch pipes (602) connected to the liquid inlet main pipe (601), wherein the liquid inlet branch pipes (602) are connected to the first end of the reaction tube (3); The liquid discharge component (7) comprises a liquid discharge valve (701) arranged at the second end of the reaction tube (3), a liquid guide plate (702) used for guiding a plurality of the liquid discharge valves (701) to discharge liquid, and a liquid discharge port (703) arranged on the liquid guide plate (702).

8. The photobioreactor according to claim 2, characterized in that: A cavity is provided in the wall of the light-transmitting sleeve (102), and a temperature-regulating liquid inlet (103) and a temperature-regulating liquid outlet (104) which are connected to the cavity are provided on the outer wall surface of the light-transmitting sleeve (102).

9. The photobioreactor according to claim 2, characterized in that: The second fill-light assembly (4) further comprises a reflective curtain (402) arranged on the inner wall of the light-transmitting sleeve (102), the reflective curtain (402) having a stowed state and an unfolded state switchable between the stowed state, in which external light can pass through the light-transmitting sleeve (102) and irradiate the reaction tube (3), and in the unfolded state, the reflective curtain (402) is fully spread on the inner wall of the light-transmitting sleeve (102) to reflect light emitted by the first lamp tube (201) and the second lamp tube (401).

10. The photobioreactor according to claim 9, characterized in that: The second fill-light assembly (4) further comprises a roller (403) capable of rolling along the circumferential direction of the inner wall of the light-transmitting sleeve (102); one side of the reflective curtain (402) is fixed to the inner wall of the light-transmitting sleeve (102), and the other side thereof is connected to the roller (403) so as to switch between the stored state and the deployed state under the drive of the roller (403).

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