Photoreactor and use method thereof

Abstract

The invention provides a photoreactor and a use method thereof, the photoreactor comprises at least one photoreaction group, each photoreaction group comprises two illumination devices and two reactor bodies, the two illumination devices comprise a first illumination device and a second illumination device, and the two reactor bodies comprise a first reactor body and a second reactor body; the liquid inlet end of the first reactor body and the liquid outlet end of the second reactor body are arranged in parallel; the first illumination device is used for sequentially illuminating the liquid inlet section of the first reactor body and the liquid outlet section of the second reactor body; the liquid outlet end of the first reactor body and the liquid inlet end of the second reactor body are arranged in parallel, and the second illumination device is used for sequentially irradiating the liquid inlet section of the second reactor body and the liquid outlet section of the first reactor body. The two reaction containers with complementary directions are set as one photoreaction group, and light rays can sequentially penetrate through parts with low cell concentration and high cell concentration in the photoreaction group at any position, so that the utilization rate of light is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of photoreactor design and relates to a photoreactor and a use method thereof. Background Art

[0002] At present, the photo-fermentation reactor is generally filled with reaction gas such as carbon dioxide from the bottom, and light enters from one side of the photo-fermentation reactor and then exits from the other side of the photo-fermentation reactor. After the reaction gas is filled into the bottom of this type of structure, the gas moves upward along the reaction vessel, and the cells in the reactor also move upward along with the concentration of light. As time goes by, the cells continue to grow, which will cause the cells at the bottom of the reactor to be new cells, but the utilization rate of light is low. The concentration of cells at the top is very high, and the demand for light is high, which will seriously cause a waste of light sources. Therefore, it is urgent to design a photoreactor to overcome the defects of the existing technology to meet the needs of practical applications. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a photoreactor and a method for using the same. In the present invention, the problem of the traditional photoreactor obtaining light in one direction is changed by the specific setting of the photoreaction group. Two reaction containers with complementary directions are set as a photoreaction group. Liquid enters the photoreaction group from both ends. Light at any position will sequentially pass through the parts with low and high cell concentrations in the photoreaction group, thereby improving the utilization rate of light and the reaction rate. The present invention has a simple structure, high operability, and is suitable for popularization and use.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides a photoreactor, the photoreactor comprising at least one photoreaction group, each of the photoreaction groups comprising two illumination devices and two reactor bodies, the two illumination devices comprising a first illumination device and a second illumination device, the two reactor bodies comprising a first reactor body and a second reactor body; the liquid inlet end of the first reactor body and the liquid outlet end of the second reactor body are arranged in parallel, the first illumination device is used for irradiating the liquid inlet section of the first reactor body and the liquid outlet section of the second reactor body in sequence; the liquid outlet end of the first reactor body and the liquid inlet end of the second reactor body are arranged in parallel, the second illumination device is used for irradiating the liquid inlet section of the second reactor body and the liquid outlet section of the first reactor body in sequence.

[0006] In the present invention, the problem of unidirectional light acquisition in the traditional photoreactor is changed through the specific setting of the photoreaction group. Two reaction containers with complementary directions are set as a photoreaction group. Liquid enters from both ends of the photoreaction group respectively. Light at any position will sequentially pass through the parts with low and high cell concentrations in the photoreaction group, thereby improving the utilization rate of light and the reaction rate. It has a simple structure, high operability, and is suitable for popularization and use.

[0007] It should be noted that the present invention does not specifically limit the specific use of the reactor body, and those skilled in the art can make adaptive adjustments according to actual conditions. Among them, the use of the first reactor body and the use of the second reactor body can be the same or different, and the first reactor body and the second reactor body can be fixedly connected or bolted.

[0008] It should be noted that, illustratively, from the perspective of the first illumination device, the "sequential illumination" in the present invention means that the light emitted by the first illumination device will first illuminate the liquid inlet section of the first reactor body, and the remaining light after the light passes through the liquid inlet section of the first reactor body will illuminate the liquid outlet section of the second reactor body. The same is true for the second illumination device.

[0009] It should be noted that the overall device of the photoreactor in the present invention can be a semi-open device or a closed device, and can be adjusted according to actual conditions.

[0010] It should be noted that the liquid inlet of the first reactor body and the liquid inlet of the second reactor body in the present invention can be the same or different, and the specific selection can be adjusted according to the actual microorganisms selected for fermentation; the gas filled into the first reactor body and the second reactor body can be the same or different, and carbon dioxide, methane, etc. can be selected; the specific selection can be adaptively adjusted according to the actual situation.

[0011] As a preferred technical solution of the present invention, the first reactor body and the second reactor body are the same.

[0012] Preferably, the first reactor body is a transparent reactor.

[0013] It should be noted that the first reactor body and the second reactor body in the present invention are both transparent reactors because the transparency can ensure that light is not blocked and passes through the reactor body for full reaction without causing the problem of low light utilization rate.

[0014] As a preferred technical solution of the present invention, the first reactor body is a serpentine structure.

[0015] It should be noted that in the present invention, the first reactor body and the second reactor body can both be straight tube-shaped, serpentine-shaped or other curved irregular shapes, as long as the first reactor body and the second reactor body are arranged side by side and the inlet and outlet are opposite. The serpentine shape is mainly selected because the structure saves area. Within the same large area, the serpentine shape can make the fermentation tank line longer; improve production capacity, the serpentine shape can provide a longer fermentation pipeline, so that more products are produced in a single fermentation; the light source can be more fully utilized, and the serpentine shape can fully absorb the divergent part of the light source.

[0016] Preferably, a first gas inlet is provided on the first reactor body.

[0017] Preferably, the first gas inlets are spaced apart at the bottom of the first reactor body.

[0018] Preferably, a second gas inlet is provided on the second reactor body.

[0019] Preferably, the second gas inlet is arranged at a distance from the bottom of the second reactor body.

[0020] It should be noted that the first air inlet and the second air inlet in the present invention may be the same or different. The first air inlet and the second air inlet are arranged at the bottom of the corresponding reactor body relative to the first reactor body and the second reactor body, respectively, and are uniformly or non-uniformly densely spaced and distributed. The number is not single, and multiple air inlets may be arranged.

[0021] It should be noted that in the present invention, the first reactor body and the second reactor body are respectively provided with gas outlets, which can be arranged at any position of the first reactor body and the second reactor body, such as the side wall, the bottom or the top, etc., as long as the gas can be discharged smoothly.

[0022] As a preferred technical solution of the present invention, the first reactor body and the second reactor body are arranged in parallel.

[0023] It should be noted that the parallel arrangement of the first reactor body and the second reactor body can make full use of the light. When the light passes through the first reactor body, since the cells in the first reactor body are in the initial growth stage and the cell density is low, most of the light will pass through the first reactor body to the second reactor body. At this time, the cell density in the second reactor body is already very high, and the light is directly absorbed by the cells, and only a small amount of light will pass through, or no light will pass through.

[0024] As a preferred technical solution of the present invention, the first reactor body is divided into a first liquid inlet portion and a first liquid outlet portion in sequence along the direction of the liquid.

[0025] Preferably, the second reactor body is divided into a second liquid outlet and a second liquid inlet in sequence along a direction facing away from the liquid.

[0026] Preferably, the first liquid inlet portion and the first liquid outlet portion have the same length.

[0027] It should be noted that in the present invention, it is preferred that the first liquid inlet portion and the first liquid outlet portion have the same length because the same length of the two portions can make the irradiation surface of the first illumination device more uniform when irradiating the portion, and the light utilization rate is higher.

[0028] Preferably, the second liquid outlet portion and the second liquid inlet portion have the same length.

[0029] It should be noted that in the present invention, it is preferred that the second liquid outlet portion and the second liquid inlet portion have the same length because the same length of the two portions can make the irradiation surface of the second illumination device more uniform when irradiating the portion, and the light utilization rate is higher.

[0030] As a preferred technical solution of the present invention, the first illumination device is arranged on a side of the first liquid inlet away from the second liquid outlet.

[0031] It should be noted that after the light of the first illumination device in the present invention irradiates the first liquid inlet, the light passing through the first liquid inlet continues to irradiate the second liquid outlet. At the same time, the microbial concentration in the first liquid inlet is high and the required light intensity is high. The microbial concentration in the second liquid outlet is at a low concentration state at this time, and the required light intensity is slightly lower, so that the light can be better utilized.

[0032] As a preferred technical solution of the present invention, the second illumination device is arranged on a side of the second liquid inlet away from the first liquid outlet.

[0033] It should be noted that after the light from the second illumination device in the present invention irradiates the second liquid inlet, the light passing through the second liquid inlet continues to irradiate the first liquid outlet. At the same time, the microbial concentration in the second liquid inlet is high and the required light intensity is high. The microbial concentration in the first liquid outlet is at a low concentration state at this time, and the required light intensity is slightly lower, so that the light can be better utilized.

[0034] As a preferred technical solution of the present invention, the light source used by the first illumination device includes any one of sunlight, fluorescent lamp illumination, LED illumination and luminous optical fiber.

[0035] Preferably, the first illumination device is a transparent container.

[0036] Preferably, the transparent container is made of any one of glass, acrylic plate and transparent plastic, and is more preferably a glass container.

[0037] It should be noted that the first illumination device in the present invention is a transparent container that can better transmit light, so that the light can be better utilized.

[0038] As a preferred technical solution of the present invention, the light source used by the second illumination device includes any one of sunlight, fluorescent lamp illumination, LED illumination and light-emitting optical fiber.

[0039] Preferably, the second illumination device is a transparent container.

[0040] Preferably, the transparent container is made of any one of glass, acrylic plate and transparent plastic, and is more preferably a glass container.

[0041] It should be noted that the second illumination device in the present invention is a transparent container that can better transmit light, so that the light can be better utilized.

[0042] It should be noted that the light sources and materials used by the first illumination device and the second illumination device in the present invention can be independently selected, and the two can be the same or different, and the specific situation needs to be selected according to actual test needs.

[0043] In a second aspect, the present invention provides a method for using the photoreactor according to the first aspect, the method comprising:

[0044] Introduce reaction liquid into the liquid inlet end of the first reactor body and the liquid inlet end of the second reactor body respectively, turn on the first illumination device to illuminate the liquid inlet section of the first reactor body and the liquid outlet section of the second reactor body in sequence, and turn on the second illumination device to illuminate the liquid inlet section of the second reactor body and the liquid outlet section of the first reactor body in sequence;

[0045] The indirectly irradiated microorganisms start to grow in the liquid from the liquid inlet end of the first reactor body and the liquid inlet end of the second reactor body, migrate with the liquid flow, and are discharged from the liquid outlet end of the first reactor body and the liquid outlet end of the second reactor body.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] In the present invention, the problem of unidirectional light acquisition in the traditional photoreactor is changed through the specific setting of the photoreaction group. Two reaction containers with complementary directions are set as a photoreaction group. Liquid enters from both ends of the photoreaction group respectively. Light at any position will sequentially pass through the parts with low and high cell concentrations in the photoreaction group, thereby improving the utilization rate of light and the reaction rate. It has a simple structure, high operability, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of the structure of a photoreactor provided in a specific embodiment of the present invention;

[0049] Figure 2 A side view of a photoreactor provided for one embodiment of the present invention;

[0050] Figure 3 A schematic diagram of the operation principle of a photoreactor provided for one specific embodiment of the present invention;

[0051] Among them, 1-first illumination device; 2-second illumination device; 3-first reactor body; 4-second reactor body; 5-first air inlet; 6-second air inlet. DETAILED DESCRIPTION

[0052] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0053] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0054] Those skilled in the art should understand that the present invention necessarily includes necessary pipelines, conventional valves and general pump equipment for realizing a complete process, but the above content does not belong to the main inventive point of the present invention. Those skilled in the art can add layouts on their own based on the process flow and equipment structure selection, and the present invention does not make special requirements and specific limitations on this.

[0055] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0056] In one embodiment, the present invention provides a photoreactor, such as Figure 1 , Figure 2 and Figure 3 As shown, the photoreactor includes at least one photoreaction group, each photoreaction group includes two illumination devices and two reactor bodies, the two illumination devices include a first illumination device 1 and a second illumination device 2, and the two reactor bodies include a first reactor body 3 and a second reactor body 4; the liquid inlet end of the first reactor body 3 and the liquid outlet end of the second reactor body 4 are arranged in parallel, and the first illumination device 1 is used to irradiate the liquid inlet section of the first reactor body 3 and the liquid outlet section of the second reactor body 4 in sequence; the liquid outlet end of the first reactor body 3 and the liquid inlet end of the second reactor body 4 are arranged in parallel, and the second illumination device 2 is used to irradiate the liquid inlet section of the second reactor body 4 and the liquid outlet section of the first reactor body 3 in sequence.

[0057] In the present invention, the problem of unidirectional light acquisition in the traditional photoreactor is changed through the specific setting of the photoreaction group. Two reaction containers with complementary directions are set as a photoreaction group. Liquid enters from both ends of the photoreaction group respectively. Light at any position will sequentially pass through the parts with low and high cell concentrations in the photoreaction group, thereby improving the utilization rate of light and the reaction rate. It has a simple structure, high operability, and is suitable for popularization and use.

[0058] It should be noted that the present invention does not specifically limit the specific use of the reactor body, and those skilled in the art can make adaptive adjustments according to actual conditions. Among them, the use of the first reactor body 3 and the use of the second reactor body 4 can be the same or different, and the first reactor body 3 and the second reactor body 4 can be fixedly connected or bolted.

[0059] It should be noted that, illustratively, with reference to the first illumination device 1, the “sequential illumination” in the present invention means that the light emitted by the first illumination device 1 will first illuminate the liquid inlet section of the first reactor body 3, and the remaining light after the light passes through the liquid inlet section of the first reactor body 3 will illuminate the liquid outlet section of the second reactor body 4. The second illumination device 2 is similar.

[0060] Further, the first reactor body 3 and the second reactor body 4 are the same, and the first reactor body 3 is a transparent reactor. It should be noted that the first reactor body 3 and the second reactor body 4 in the present invention are both transparent reactors because the transparent setting can make the light not blocked, pass through the reactor body for full reaction, and will not cause the problem of low light utilization rate.

[0061] Furthermore, the first reactor body 3 is a serpentine structure. It should be noted that the first reactor body 3 and the second reactor body 4 in the present invention can be straight tube-shaped, serpentine-shaped or other curved irregular shapes, as long as the first reactor body 3 and the second reactor body 4 are arranged in parallel and the inlets and outlets are opposite.

[0062] Furthermore, the first reactor body 3 is provided with first air inlets 5 , which are arranged at intervals at the bottom of the first reactor body 3 .

[0063] Furthermore, the second reactor body 4 is provided with second air inlets 6 , which are arranged at intervals at the bottom of the second reactor body 4 .

[0064] Furthermore, the first reactor body 3 and the second reactor body 4 are arranged in parallel.

[0065] Further, the first reactor body 3 is divided into a first liquid inlet and a first liquid outlet in sequence along the direction of the liquid, and the second reactor body 4 is divided into a second liquid outlet and a second liquid inlet in sequence along the direction opposite to the liquid. The first liquid inlet and the first liquid outlet are of the same length. It should be noted that in the present invention, the first liquid inlet and the first liquid outlet are preferably of the same length because the same length of the two parts can make the irradiation surface of the first illumination device 1 more uniform when irradiating the part, and the utilization rate of light is higher.

[0066] Furthermore, the second liquid outlet portion and the second liquid inlet portion have the same length. It should be noted that in the present invention, the second liquid outlet portion and the second liquid inlet portion preferably have the same length because the same length of the two portions can make the irradiation surface of the second illumination device 2 more uniform when irradiating the portion, and the light utilization rate is higher.

[0067] Furthermore, the first illumination device 1 is arranged on a side of the first liquid inlet away from the second liquid outlet. It should be noted that, after the light of the first illumination device 1 in the present invention irradiates the first liquid inlet, the light passing through the first liquid inlet continues to irradiate the second liquid outlet. At the same time, the microorganism concentration in the first liquid inlet is high, and the required illumination intensity is high. The microorganism concentration in the second liquid outlet is at a low concentration state at this time, and the required illumination intensity is slightly lower, so that the illumination can be better utilized.

[0068] Furthermore, the second illumination device 2 is arranged on a side of the second liquid inlet away from the first liquid outlet. It should be noted that, after the light of the second illumination device 2 in the present invention irradiates the second liquid inlet, the light passing through the second liquid inlet continues to irradiate the first liquid outlet. At the same time, the microorganism concentration in the second liquid inlet is high, and the required illumination intensity is high. The microorganism concentration in the first liquid outlet is at a low concentration state at this time, and the required illumination intensity is slightly lower, so that the illumination can be better utilized.

[0069] Furthermore, the light source used by the first illumination device 1 includes any one of sunlight, fluorescent lamp irradiation, LED irradiation and light-emitting optical fiber, and the first illumination device 1 is a transparent container, and the material used by the transparent container is any one of glass, acrylic plate and transparent plastic, and is more preferably a glass container. It should be noted that the first illumination device 1 in the present invention is a transparent container that can better transmit light, so that the light can be better utilized.

[0070] Furthermore, the light source used by the second illumination device 2 includes any one of sunlight, fluorescent lamp irradiation, LED irradiation and light-emitting optical fiber, and the second illumination device 2 is a transparent container, and the material used by the transparent container is any one of glass, acrylic plate and transparent plastic, and is more preferably a glass container. It should be noted that the second illumination device 2 in the present invention is a transparent container that can better transmit light, so that the light can be better utilized.

[0071] It should be noted that the light sources and materials used in the first illumination device 1 and the second illumination device 2 in the present invention can be independently selected, and the two can be the same or different. The specific situation needs to be selected according to the actual test needs, and the light source is not only the above-mentioned light source, but also other available light sources such as ultraviolet light.

[0072] In another specific embodiment, the present invention provides a method for using the above-mentioned photoreactor, the method comprising:

[0073] The reaction liquid is introduced into the liquid inlet end of the first reactor body 3 and the liquid inlet end of the second reactor body 4 respectively, and the first illumination device 1 is turned on to illuminate the liquid inlet section of the first reactor body 3 and the liquid outlet section of the second reactor body 4 in sequence, and the second illumination device 2 is turned on to illuminate the liquid inlet section of the second reactor body 4 and the liquid outlet section of the first reactor body 3 in sequence;

[0074] The indirectly irradiated microorganisms start to grow in the liquid from the liquid inlet end of the first reactor body 3 and the liquid inlet end of the second reactor body 4 and migrate with the liquid flow, and are discharged from the liquid outlet end of the first reactor body 3 and the liquid outlet end of the second reactor body 4 respectively.

[0075] Example 1

[0076] This embodiment provides a photoreactor, wherein:

[0077] The photoreactor includes a photoreaction group, which includes two illumination devices and two reactor bodies. The two illumination devices include a first illumination device 1 and a second illumination device 2, and the two reactor bodies include a first reactor body 3 and a second reactor body 4; the liquid inlet end of the first reactor body 3 and the liquid outlet end of the second reactor body 4 are arranged in parallel, and the first illumination device 1 is used to irradiate the liquid inlet section of the first reactor body 3 and the liquid outlet section of the second reactor body 4 in sequence; the liquid outlet end of the first reactor body 3 and the liquid inlet end of the second reactor body 4 are arranged in parallel, and the second illumination device 2 is used to irradiate the liquid inlet section of the second reactor body 4 and the liquid outlet section of the first reactor body 3 in sequence.

[0078] The first reactor body 3 is the same as the second reactor body 4 . The first reactor body 3 is a transparent reactor with a serpentine structure. The first reactor body 3 and the second reactor body 4 are arranged in parallel.

[0079] The first reactor body 3 is provided with first gas inlets 5, which are arranged at intervals at the bottom of the first reactor body 3. The second reactor body 4 is provided with second gas inlets 6, which are arranged at intervals at the bottom of the second reactor body 4.

[0080] The first reactor body 3 is divided into a first liquid inlet and a first liquid outlet along the direction of the liquid, and the second reactor body 4 is divided into a second liquid outlet and a second liquid inlet along the direction opposite to the liquid. The first liquid inlet and the first liquid outlet are of the same length, and the second liquid outlet and the second liquid inlet are of the same length.

[0081] The first illumination device 1 is disposed on a side of the first liquid inlet away from the second liquid outlet. The second illumination device 2 is disposed on a side of the second liquid inlet away from the first liquid outlet.

[0082] The light source used by the first illumination device 1 is sunlight, and the first illumination device 1 is a glass container. The light source used by the second illumination device 2 is fluorescent lamp irradiation, and the second illumination device 2 is a glass container.

[0083] In summary, the present invention changes the problem of unidirectional light acquisition of traditional photoreactors through the specific setting of the photoreaction group. Two reaction containers with complementary directions are set as a photoreaction group. Liquid enters the photoreaction group from both ends. Light at any position will pass through the parts with low and high cell concentrations in the photoreaction group in turn, thereby improving the utilization rate of light and the reaction rate. It has a simple structure, high operability, and is suitable for popularization and use.

[0084] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention are within the protection scope and disclosure scope of the present invention.

Claims

1. A photoreactor, characterized in that: The photoreactor comprises at least one photoreaction group, each of the photoreaction groups comprises two illumination devices and two reactor bodies, the two illumination devices comprise a first illumination device and a second illumination device, and the two reactor bodies comprise a first reactor body and a second reactor body; The liquid inlet end of the first reactor body and the liquid outlet end of the second reactor body are arranged in parallel, and the first illumination device is used to illuminate the liquid inlet section of the first reactor body and the liquid outlet section of the second reactor body in sequence; The liquid outlet end of the first reactor body and the liquid inlet end of the second reactor body are arranged in parallel, and the second illumination device is used to illuminate the liquid inlet section of the second reactor body and the liquid outlet section of the first reactor body in sequence.

2. The photoreactor according to claim 1, characterized in that The first reactor body and the second reactor body are identical; Preferably, the first reactor body is a transparent reactor.

3. The photoreactor according to claim 2, characterized in that: The first reactor body is a serpentine structure; Preferably, the first reactor body is provided with a first gas inlet; Preferably, the first gas inlets are spaced apart at the bottom of the first reactor body; Preferably, a second air inlet is provided on the second reactor body; Preferably, the second gas inlet is arranged at a distance from the bottom of the second reactor body.

4. The photoreactor according to any one of claims 1 to 3, characterized in that: The first reactor body and the second reactor body are arranged in parallel.

5. The photoreactor according to any one of claims 1 to 4, characterized in that: The first reactor body is divided into a first liquid inlet portion and a first liquid outlet portion in sequence along the direction of the liquid; Preferably, the second reactor body is divided into a second liquid outlet and a second liquid inlet in sequence along the direction facing away from the liquid; Preferably, the first liquid inlet portion and the first liquid outlet portion have the same length; Preferably, the second liquid outlet portion and the second liquid inlet portion have the same length.

6. The photoreactor according to claim 5, characterized in that: The first illumination device is disposed on a side of the first liquid inlet away from the second liquid outlet.

7. The photoreactor according to claim 5, characterized in that: The second illumination device is arranged on a side of the second liquid inlet away from the first liquid outlet.

8. The photoreactor according to any one of claims 1 to 7, characterized in that: The light source used by the first illumination device includes any one of sunlight, fluorescent lamp illumination, LED illumination and light-emitting optical fiber; Preferably, the first illumination device is a transparent container; Preferably, the transparent container is made of any one of glass, acrylic plate and transparent plastic, and is more preferably a glass container.

9. The photoreactor according to any one of claims 1 to 8, characterized in that: The light source used by the second illumination device includes any one of sunlight, fluorescent lamp illumination, LED illumination and light-emitting optical fiber; Preferably, the second illumination device is a transparent container; Preferably, the transparent container is made of any one of glass, acrylic plate and transparent plastic, and is more preferably a glass container.

10. A method for using the photoreactor according to any one of claims 1 to 9, characterized in that: The method of use includes: Introduce reaction liquid into the liquid inlet end of the first reactor body and the liquid inlet end of the second reactor body respectively, turn on the first illumination device to illuminate the liquid inlet section of the first reactor body and the liquid outlet section of the second reactor body in sequence, and turn on the second illumination device to illuminate the liquid inlet section of the second reactor body and the liquid outlet section of the first reactor body in sequence; The indirectly irradiated microorganisms start to grow in the liquid from the liquid inlet end of the first reactor body and the liquid inlet end of the second reactor body, migrate with the liquid flow, and are discharged from the liquid outlet end of the first reactor body and the liquid outlet end of the second reactor body.

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