Light source device, sewage treatment system and sewage treatment method

Abstract

The present invention belongs to the field of sewage treatment technology and provides a light source device, a sewage treatment system, and a sewage treatment method. The light source device includes a housing and a first light source assembly, the housing having a light-transmitting surface, the first light source assembly including a focusing structure, a light-guiding structure, and a reflective structure disposed within the housing; the focusing structure is used to collect sunlight and focus the collected sunlight within a smaller range before transmitting it to the light-guiding structure; the light-guiding structure is used to guide the sunlight focused by the focusing structure into the housing; and the reflective structure is used to reflect the sunlight guided into the housing by the light-guiding structure so that the sunlight is emitted from the light-transmitting surface of the housing. The light source device, sewage treatment system, and sewage treatment method provided by the present invention have a simple structure and a reasonable design. They can directly collect and utilize sunlight, saving energy, and do not require converting sunlight into electrical energy and then converting electrical energy into light energy, thereby achieving improved efficiency in the use of solar energy.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a light source device, a sewage treatment system and a sewage treatment method. Background Art

[0002] Research has shown that filamentous algae are highly effective in treating elements like nitrogen and phosphorus in wastewater. This is because filamentous algae require light to convert these elements into their own components, effectively treating them. Therefore, when using filamentous algae for wastewater treatment, they typically require exposure to light.

[0003] However, existing sewage treatment systems use two methods of illumination for filamentous algae: first, converting electrical energy into light to provide illumination for the filamentous algae, which is not energy-efficient; and second, converting sunlight into electrical energy and then converting the electrical energy into light, which has a low energy utilization rate. Summary of the Invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a light source device, a sewage treatment system and a sewage treatment method to achieve the purpose of energy saving and improving energy utilization.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a light source device, comprising a housing and a first light source assembly, wherein the housing has a light-transmitting surface, and the first light source assembly comprises a light-collecting structure, a light-guiding structure, and a light-reflecting structure disposed within the housing;

[0006] The focusing structure is used to collect sunlight and concentrate the collected sunlight in a smaller range before passing it to the light-guiding structure. The light-guiding structure is used to guide the sunlight concentrated by the focusing structure into the shell. The reflective structure is used to reflect the sunlight guided into the shell by the light-guiding structure so that the sunlight is emitted from the light-transmitting surface of the shell.

[0007] Furthermore, the light-concentrating structure includes a light-concentrating element, and the light-concentrating element is arranged on the top of the shell.

[0008] Furthermore, the light-guiding structure includes an optical fiber cable, the light input end of the optical fiber cable is located at the light source gathering place of the focusing structure, the light output end is located in the shell and faces the reflective surface of the reflective structure, and the angle between the axial direction of the light output end of the optical fiber cable and the reflective surface is α, wherein 0°<α<90°.

[0009] Furthermore, the reflective structure includes a reflective member, which is provided with multiple reflective surfaces. The multiple reflective surfaces are arranged in parallel in sequence along the height direction of the shell. The projections of any two adjacent reflective surfaces on a plane perpendicular to the center line of the light-emitting end of the optical fiber cable have overlapping areas and non-overlapping areas, and the non-overlapping areas of the reflective surfaces farther away from the light-emitting end of the optical fiber cable are closer to the light-transmitting surface of the shell.

[0010] Furthermore, any one of the reflective surfaces is in an arc shape, and both ends of the reflective surface are in contact with the light-transmitting surface of the shell.

[0011] Furthermore, α=45°.

[0012] Furthermore, it also includes a second light source assembly, the number of the first light source assembly and the second light source assembly are both multiple, the multiple first light source assemblies and the multiple second light source assemblies are alternately arranged in sequence along the length direction of the shell, and the second light source assembly includes a light-emitting lamp.

[0013] In a second aspect, the present invention provides a sewage treatment system, comprising a water storage device and a substrate, and also comprising a light source device as described above, wherein the light source device is arranged in the water storage device, and multiple light source devices and multiple substrates are arranged alternately in sequence.

[0014] Furthermore, it also includes a cleaning device, which is used to clean the light-transmitting surface of the light source device.

[0015] In a third aspect, the present invention provides a sewage treatment method, which uses any of the sewage treatment systems described above.

[0016] Beneficial effects of the present invention:

[0017] The light source device, sewage treatment system and sewage treatment method provided by the present invention have a simple structure and a reasonable design. By setting a focusing structure, a light-guiding structure and a reflective structure, the purpose of utilizing sunlight is achieved, thereby achieving the purpose of energy saving. There is no need to convert sunlight into electrical energy and then convert electrical energy into light energy, thereby achieving the purpose of improving the efficiency of solar energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0019] Figure 1A structural diagram of a light source device provided in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 A cross-sectional view of the light source device in the AA direction shown;

[0021] Figure 3 for Figure 1 A cross-sectional view of the light source device in the BB direction shown;

[0022] Figure 4 A structural diagram of a sewage treatment system provided by one embodiment of the present invention;

[0023] Figure 5 A three-dimensional structural view of a light source device and a cleaning device of a sewage treatment system provided by one embodiment of the present invention;

[0024] Figure 6 for Figure 5 The cross-sectional view shown;

[0025] Figure 7 for Figure 6 An enlarged view of point C is shown;

[0026] Figure 8 for Figure 6 A cross-sectional view of the light source device in the DD direction is shown.

[0027] Reference numerals:

[0028] Housing 100, optical fiber cable 210, reflector 220, reflective surface 221, light emitting lamp 230;

[0029] Water storage device 1, substrate 2, light source device 3, cleaning device 4, sliding seat 41, scraper 42, scraper 42, second screw 431, second motor 432, limit block 441, locking member 442, first elastic member 443, first magnet 444, second magnet 445, driving rod 451, second elastic member 452. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0031] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as limiting the present invention.

[0033] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0034] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] Example 1, as Figure 1-3 As shown, the present invention provides a light source device, including a housing 100 and a first light source assembly.

[0037] The housing 100 has a light-transmitting surface. The first light source assembly includes a light-collecting structure, a light-guiding structure, and a light-reflecting structure disposed within the housing 100. The light-collecting structure is used to collect sunlight and focus the collected sunlight on a smaller area before transmitting it to the light-guiding structure. The light-guiding structure is used to direct the sunlight collected by the light-collecting structure into the housing 100. The light-reflecting structure is used to reflect the sunlight directed into the housing 100 by the light-guiding structure, so that the sunlight is emitted from the light-transmitting surface.

[0038] When in use, under the action of the focusing structure, the focusing structure gathers sunlight to one place, and the gathered sunlight enters the light input end of the light guide structure, and then enters the shell 100 from the light output end of the light guide structure. Under the action of the reflective structure, the reflective structure will reflect the light toward the light-transmitting surface of the shell 100 and enter the water storage device from the light-transmitting surface, so as to achieve the purpose of providing light to the filamentous algae on the substrate.

[0039] The light source device of this structure has a simple structure. It directly introduces sunlight into the water storage device through the focusing structure, light-guiding structure and reflective structure to provide light for the filamentous algae. This not only saves energy, but also eliminates the need to convert solar energy into electrical energy and then convert electrical energy into light energy, thereby improving the utilization rate of solar energy.

[0040] In one embodiment, the concentrating structure includes a concentrating element (shown in the accompanying drawings) disposed on top of the housing 100. The concentrating element concentrates the collected sunlight into a smaller area through the principles of transmission and projection, thereby increasing the power density of the sunlight and collecting sufficient sunlight. Examples include a Fresnel lens, a convex lens, and the like.

[0041] like Figure 1 and 3 As shown, in one embodiment, the light-guiding structure includes an optical fiber cable 210, the light input end of the optical fiber cable 210 is located at the light source gathering place of the focusing structure, the light output end is located in the housing 100 and faces the reflective surface of the reflective structure, and the angle between the axial direction of the light output end of the optical fiber cable and the reflective surface is α, wherein 0°<α<90°. Preferably, α=45°, so that the incident angle of the light emitted from the reflective structure and parallel to the axis of the light output end of the optical fiber cable 210 is 45°, and the reflection angle of the above light is also 45°. Then, under the action of the reflective surface, the light emitted from the vertical direction will be emitted from the light-transmitting surface in the horizontal direction, so that the light can directly illuminate the filamentous algae, thereby achieving the purpose of improving the illumination effect.

[0042] like Figure 3As shown, in one embodiment, the reflective structure includes a reflective member 220, which is provided with multiple reflective surfaces 221. Of course, the angle α of the multiple reflective surfaces 221 remains the same. The multiple reflective surfaces 221 are arranged in parallel in sequence along the height direction of the housing 100, that is, the bottom of the previous reflective surface 221 is flush with the top of the next reflective surface 221. The projections of any two adjacent reflecting surfaces 221 on a plane perpendicular to the axis of the light-emitting end of the optical fiber cable 210 (in this embodiment, the plane is a horizontal plane) have overlapping areas and non-overlapping areas, and the non-overlapping areas of the reflecting surfaces 221 that are farther away from the light-emitting end of the optical fiber cable 210 are closer to the light-transmitting surface of the shell 100, so that any two adjacent reflecting surfaces 221 are staggered with each other, and the upper reflecting surface 221 does not completely block the next reflecting surface 221, thereby achieving the purpose of making the reflecting surfaces 221 of all the reflective elements 220 from top to bottom reflect light, thereby achieving the purpose of increasing the illumination range. At the same time, it can also achieve the purpose of using a smaller thickness of the shell 100 to achieve a larger illumination range.

[0043] When in use, the light emitted from the light-emitting end of the focusing structure is directed toward the reflective surface 221. Under the action of the reflective surface 221, the reflective surface 221 reflects the light toward the translucent surface, and finally the light is directed toward the filamentous algae from the translucent surface, thereby achieving the purpose of illuminating the filamentous algae.

[0044] The reflective structure of this structure is not only simple in structure, but also effectively reduces the thickness of the housing 100 while meeting the illumination range by staggering the plurality of reflective surfaces 221 in the longitudinal direction.

[0045] like Figure 3 As shown, in one embodiment, any one of the reflective surfaces 221 is arc-shaped, both ends of the reflective surface 221 are in contact with the translucent surface, and the bottom of the reflective surface 221 of the reflective element 220 located at the bottom is in contact with the translucent surface, so that the light entering the shell 100 is wrapped by the translucent surface of the shell 100 and the reflective element 220, thereby achieving the purpose of allowing all the light entering the shell 100 to be emitted from the translucent surface, thereby achieving the purpose of improving the utilization rate of the light.

[0046] like Figure 2 As shown, in one embodiment, a second light source assembly is further included. The number of first light source assemblies and second light source assemblies is multiple, and the multiple first light source assemblies and the multiple second light source assemblies are alternately arranged along the length direction of the housing 100. That is, along the length direction of the housing 100, they are arranged in a manner of one first light source assembly and one second light source assembly or one second light source assembly and one first light source assembly. The second light source assembly includes a light emitting lamp 230.

[0047] By comprehensively utilizing the first light source assembly and the second light source assembly, the purpose of energy saving can be achieved, and at the same time, the purpose of increasing the lighting time can be achieved.

[0048] like Figure 4 As shown in the second embodiment, the present invention provides a sewage treatment system, comprising a water storage device 1 and a substrate 2. A plurality of substrates 2 are provided, spaced apart along the width of the water storage device 1 and inserted longitudinally within the water storage device 1. The substrates 2 are used to secure filamentous algae. The system also includes a light source device 3 according to any of the above items, disposed within the water storage device 1. The plurality of light source devices 3 and the plurality of substrates 2 are alternately arranged, i.e., arranged in a sequence of one light source device 3 per substrate 2 or one substrate 2 per light source device 3.

[0049] During use, the sewage to be treated is introduced into the water storage device 1. Under the action of the light source device 3, the light source device 3 illuminates the filamentous algae, causing them to grow, thereby converting elements such as N and P in the water into its own components, thereby achieving the purpose of treating the N and P elements in the water. At the same time, because the water in the water storage device 1 is in a flowing state, it is more conducive to the expansion and growth of the filamentous algae. Therefore, the water flow in the water storage device 1 is generally in a flowing state. The substrate 2 and the light source device 3 divide the water storage device 1 into many smaller areas, making the flow rate of the water between any adjacent substrates 2 and light source devices 3 more uniform, without turbulence, etc., and the light-emitting device is placed in the sewage to better provide light to the filamentous algae.

[0050] Since the light source device 3 is immersed in sewage for a long time, algae such as cyanobacteria will inevitably grow on the surface of the light source device 3, thereby affecting the propagation of light and, in turn, the illumination intensity for filamentous algae. Therefore, preferably, the sewage treatment system further includes a cleaning device for cleaning the light-transmitting surface of the light source device 3.

[0051] like Figure 5-8 As shown, specifically, the cleaning device 4 includes a sliding seat 41, a scraper 42 and a first driving assembly.

[0052] The sliding seat 41 is slidably disposed on one side of the light source device 3. The sliding seat 41 can perform reciprocating linear motion between a first working position and a second working position along the length direction of the light source device 3. When the sliding seat 41 is in the first working position, the sliding seat 41 is located at the first end of the light source device 3. When the sliding seat 41 is in the second working position, the sliding seat 41 is located at the second end of the light source device 3. A scraper 42 is disposed on the side of the sliding seat 41 facing the light source device 3. The scraper blade 42 can contact the light-transmitting surface of the light source device 3.

[0053] The first drive assembly is used to drive the sliding seat 41 to perform reciprocating linear motion between the first working position and the second working position. Specifically, the first drive assembly includes a second lead screw 431 and a second motor 432. Two second lead screws 431 are provided, and the two second lead screws 431 are respectively arranged on the upper and lower sides of the light source device 3. The axial centerline direction of the second lead screw 431 is parallel to the length direction of the light source device 3 and is rotatably connected to the frame. The two second lead screws 431 are both threadedly connected to the sliding seat 41. The power output shaft of the second motor 432 is transmission-connected to the power input end of the second lead screw 431. When in use, the second motor 432 drives the second lead screw 431 to rotate in the forward direction, thereby achieving the purpose of driving the sliding seat 41 to move from the first working position to the second working position, and the second motor 432 drives the second lead screw 431 to rotate in the reverse direction, thereby achieving the purpose of driving the sliding seat 41 to move from the second working position to the first working position.

[0054] like Figure 6-8 As shown, in one embodiment, the cleaning device 4 further includes a locking assembly and a second driving assembly.

[0055] The locking assembly includes a limiting block 441 , a locking member 442 and a driving structure.

[0056] The middle parts of the upper and lower ends of the scraper 42 are hinged to the sliding seat 41, and the scraper 42 can make reciprocating linear motion around its own hinge center line between the third working position and the fourth working position, wherein, when the scraper 42 is in the third working position, the scraping edge of the scraper 42 is located on one side of its own hinge center line, and when the scraper 42 is in the fourth working position, the scraping edge of the scraper 42 is located on the other side of its own hinge center line, so that during the cleaning process, the scraping edge of the scraper 42 is always on the front side of the hinge center line of the scraper 42, so as to achieve the purpose of improving the cleaning effect.

[0057] The scraper 42 has a limit block 441 on each side of the upper and lower ends, away from the light-transmitting surface of the light source device 3. The limit block 441 is fixedly connected to the sliding seat 41. The limit block 441 has an arc-shaped sliding groove. The scraper 42 has a sliding portion at each end, which is inserted into the sliding groove. When the scraper 42 is in the third working position, the sliding portion is at the first end of the sliding groove. When the scraper 42 is in the fourth working position, the sliding portion is at the second end of the sliding groove. Two locking members 442 are provided, and the two locking members 442 correspond to the two sliding grooves respectively. Therefore, when the scraper 42 swings to the third working position, one of the locking members 442 locks the scraper 42 in the third working position. When the scraper 42 swings to the fourth working position, the other locking member 442 locks the scraper 42 in the fourth working position.

[0058] Specifically, the locking member 442 has a locking portion. The locking member 442 has a fifth working position in which it is in a locked position and a sixth working position in which it is in an unlocked position. The locking member 442 is slidably disposed within the limiting block 441 and can perform reciprocating linear motion between the fifth and sixth working positions. When the locking member 442 is in the fifth working position, the locking portion is inserted into the chute, thereby preventing the sliding portion from moving along the chute, thereby locking the scraper 42. When the locking member 442 is in the sixth working position, the locking portion is located outside the chute, thereby allowing the sliding portion to slide along the chute, thereby unlocking the scraper 42.

[0059] There are two driving structures, each for driving the two locking members 442 to perform reciprocating linear motion between the fifth working position and the sixth working position. The driving structure includes a first elastic member 443 and a magnet group.

[0060] The first elastic member 443 is respectively mounted on the locking member 442. The two ends of the first elastic member 443 are respectively connected to the locking member 442 and the sliding seat 41. In the natural state, the first elastic member 443 has a tendency to move the locking member 442 from the sixth working position to the fifth working position. Preferably, the first elastic member 443 is a spring.

[0061] There are two magnet groups, which are respectively arranged at both ends of the locking member 442 . The magnet groups include a first magnet 444 and a second magnet 445 .

[0062] Both ends of the locking piece 442 extend outside the sliding seat 41, and the first magnets 444 in the two magnet groups are respectively embedded in the two ends of the locking piece 442, and the second magnets 445 in the two magnet groups are respectively arranged at the two ends of the light source device 3 and fixedly connected to the frame, wherein the second magnet 445 in one magnet group and the first magnet 444 on the opposite side have the same magnetism, and the second magnet 445 in the other magnet group and the first magnet 444 have opposite magnetism, so that no matter whether the sliding seat 41 moves to the first working position or the second working position, the two locking pieces 442 can move from the fifth working position to the sixth working position under the action of the magnetic attraction and magnetic repulsion between the first magnet 444 and the second magnet 445, so that while releasing the lock on the scraper 42, it will not affect the sliding part sliding from one end of the slide groove to the other end.

[0063] During use, when the sliding seat 41 moves to the first working position, the first magnets 444 of the two locking members 442 facing the first end of the light source device 3 respectively correspond to the two second magnets 445 located at the first end of the light source device 3, so that the two locking members 442 are respectively moved from the fifth working position to the sixth working position under the action of the magnetic attraction and magnetic repulsion between the first magnets 444 and the second magnets 445, thereby releasing the lock on the scraper 42 while not affecting the sliding part from the first end of the slide groove to the second end; similarly, when the sliding seat 41 moves to the second working position, the first magnets 444 of the two locking members 442 facing the second end of the light source device 3 respectively correspond to the two second magnets 445 located at the second end of the light source device 3, thereby releasing the lock on the scraper 42 while not affecting the sliding part from the second end of the slide groove to the first end.

[0064] The second drive assembly includes a drive rod 451 and a second elastic member 452. Two drive rods 451 are provided, one at each end of the light source device 3. The drive rods 451 are slidably connected to the light source device 3. The drive rods 451 have a seventh working position closer to the center of the light source device 3 and an eighth working position farther from the center of the light source device 3. The driving end of the drive rod 451 can contact the scraper 42. Two second elastic members 452 are provided, each of which is mounted on the two drive rods 451. In a natural state, the second elastic member 452 has a tendency to move the drive rod 451 from the eighth working position to the seventh working position. Preferably, the second elastic member 452 is a spring.

[0065] During use, during the movement of the sliding seat 41 to the first working position, the scraper 42 collides with the driving rod 451 located at the first end of the light source device 3, thereby driving the driving rod 451 from the seventh working position to the eighth working position. When the sliding seat 41 moves to the first working position, the first magnet 444 facing the first end of the light source device 3 corresponds to the second magnet 445 located at the first end of the light source device 3. Under the action of the magnetic attraction or magnetic repulsion between the corresponding first magnet 444 and second magnet 445, the two locking members 442 move from the fifth working position to the sixth working position, thereby releasing the lock on the scraper 42. Under the action of the elastic force of the second elastic member 452, the second elastic member 452 drives the driving rod 451 from the eighth working position to the seventh working position, and then drives the scraper 42 to rotate through the driving rod 451. In this way, the inclination direction of the scraper 42 can be adjusted so that the scraping edge of the scraper 42 is at the front side of its hinge center line during the movement of the sliding seat 41 from the first working position to the second working position.

[0066] Similarly, during the movement of the sliding seat 41 to the second working position, the scraper 42 collides with the driving rod 451 located at the second end of the light source device 3, thereby driving the driving rod 451 from the seventh working position to the eighth working position. When the sliding seat 41 moves to the second working position, the first magnet 444 facing the second end of the light source device 3 corresponds to the second magnet 445 located at the second end of the light source device 3. Under the action of the magnetic attraction or magnetic repulsion between the corresponding first magnet 444 and second magnet 445, the two locking members 442 move from the fifth working position to the sixth working position, thereby releasing the lock on the scraper 42. Under the action of the elastic force of the second elastic member 452, the second elastic member 452 drives the driving rod 451 from the eighth working position to the seventh working position, and then drives the scraper 42 to rotate through the driving rod 451. In this way, the inclination direction of the scraper 42 can be adjusted again, so that during the movement of the sliding seat 41 from the second working position to the first working position, the scraping edge of the scraper 42 is at the front side of its hinge center line.

[0067] In a third embodiment, the present invention provides a sewage treatment method, which uses the above-mentioned sewage treatment system.

[0068] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A light source device, characterized in that: The device comprises a housing and a first light source assembly, wherein the housing has a light-transmitting surface, and the first light source assembly comprises a light-collecting structure, a light-guiding structure, and a light-reflecting structure arranged in the housing; The concentrating structure is used to collect sunlight and concentrate the collected sunlight in a smaller range before transmitting it to the light-guiding structure. The light-guiding structure is used to guide the sunlight concentrated by the concentrating structure into the housing. The reflective structure is used to reflect the sunlight guided into the housing by the light-guiding structure so that the sunlight is emitted from the light-transmitting surface of the housing. The light-guiding structure includes an optical fiber cable, wherein the light input end of the optical fiber cable is located at the light source gathering place of the light-concentrating structure, the light output end is located in the housing and faces the reflective surface of the reflective structure, and the angle between the axial direction of the light output end of the optical fiber cable and the reflective surface is α, wherein 0°<α<90°; The reflective structure includes a reflective member, which is provided with multiple reflective surfaces. The multiple reflective surfaces are arranged in parallel in sequence along the height direction of the shell, and the projections of any two adjacent reflective surfaces on a plane perpendicular to the center line of the light-emitting end of the optical fiber cable have overlapping areas and non-overlapping areas, and the non-overlapping areas of the reflective surfaces farther away from the light-emitting end of the optical fiber cable are closer to the light-transmitting surface of the shell.

2. The light source device according to claim 1, wherein The light-concentrating structure includes a light-concentrating element, and the light-concentrating element is arranged on the top of the housing.

3. The light source device according to claim 1 or 2, characterized in that: Any one of the reflective surfaces is in an arc shape, and both ends of the reflective surface are in contact with the light-transmitting surface of the shell.

4. The light source device according to claim 3, wherein α=45°。 5. The light source device according to claim 1, 2 or 4, characterized in that: It also includes a second light source assembly. The first light source assembly and the second light source assembly are both in multiple numbers. The multiple first light source assemblies and the multiple second light source assemblies are alternately arranged in sequence along the length direction of the shell. The second light source assembly includes a light-emitting lamp.

6. A sewage treatment system comprising a water storage device and a substrate, characterized in that: It also includes the light source device according to any one of claims 1 to 5, wherein the light source device is arranged in the water storage device, and a plurality of the light source devices and a plurality of the substrates are alternately arranged in sequence.

7. The sewage treatment system according to claim 6, further comprising a cleaning device, wherein the cleaning device is used to clean the light-transmitting surface of the light source device.

8. A sewage treatment method, characterized in that: The sewage treatment method uses the sewage treatment system according to any one of claims 6 to 7.

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