A mobile light source bioreactor with a self-cleaning structure

Abstract

The present invention relates to a mobile light source bioreactor with a self-cleaning structure, which belongs to the technical field of sewage biological treatment. The bioreactor includes a reaction tank body and a mobile light source mechanism, the mobile light source mechanism includes a light source and a driving mechanism, the reaction tank body is equipped with a self-cleaning structure, the self-cleaning structure includes a cleaning part that contacts the light source in the upper working position to clean the microorganisms attached to the light source, and also includes a spraying device for spraying the light source cleaned by the cleaning part, which can flush the microorganisms into the reaction tank body to prevent the light source from being affected by the attachment of bacteria and algae microorganisms and affecting the propagation of light. In addition, a water immersion sensor is provided on the light source, which is turned off when it comes out of the water, thereby extending the service life of the light source; the driving mechanism adopts a double-chain synchronous transmission, and the structure is hollowed out to ensure that the transmission does not affect the full mixing of sewage and bacteria and algae organisms.

Description

Technical Field

[0001] The invention relates to a mobile light source bioreactor with a self-cleaning structure, belonging to the technical field of sewage biological treatment. Background Art

[0002] At present, the treatment of industrial wastewater, aquaculture wastewater and domestic sewage has begun to adopt the technology of bacterial symbiosis. Compared with traditional processes, the technology of bacterial symbiosis can utilize the respective advantages of microalgae and bacteria to synergistically remove pollutants while saving a lot of aeration. In addition, the carbon dioxide produced by bacterial respiration and metabolism provides substrate for microalgae photosynthesis and has a great impact on NO. X It also has a certain capture effect on greenhouse gases such as CO2, which is of great significance to the realization of sewage treatment goals.

[0003] In a bacteria-algae symbiotic system, efficient light energy utilization is crucial to fully ensure the photosynthesis of microalgae. For example, Chinese invention patent publication number CN104986864B discloses a bacteria-algae symbiotic reactor. The top and sides of the reactor units are made of transparent materials to facilitate the passage of natural light. When natural light is insufficient, supplemental light can be provided by light-emitting devices installed between adjacent unit reactors. While this approach fully utilizes natural light, it is not suitable for large-scale treatment facilities. The light source utilization efficiency is low, and when algae adhere to the inner wall of the reactor, it further hinders light transmission.

[0004] Another example is the mobile light source bacteria-algae reactor and its operating method disclosed in the Chinese invention patent application with application publication number CN113603228A. In one embodiment, an external power source drives the light-emitting structure of the mobile light source mechanism to rotate back and forth within the corresponding tank unit through a circulating chain. In other words, part of the light-emitting structure is located below the water surface, while the other part is located above the water surface. This causes the distance between the mobile light source and the bacteria and algae to continuously change, and the light intensity also continuously changes, effectively activating the algae flash effect and thereby improving the utilization rate of light energy. However, due to the limited movement speed of the light-emitting structure, that is, the movement of the light source does not generate a large centrifugal force, microorganisms such as bacterial flocs and microalgae will inevitably adhere to the light source, which, after long-term accumulation, seriously affects the propagation of light energy. Summary of the Invention

[0005] The object of the present invention is to provide a mobile light source bioreactor with a self-cleaning structure to solve the problem in existing reactors that microorganisms may adhere to the light source and thus affect the propagation of light energy.

[0006] To achieve the above objectives, the mobile light source bioreactor with a self-cleaning structure in the present invention adopts the following technical solutions:

[0007] A mobile light source bioreactor with a self-cleaning structure includes a reaction tank body and a mobile light source mechanism. The mobile light source mechanism includes a light source and a driving mechanism that is transmission-connected to the light source to drive the light source to move. The light source moving stroke has a lower station for being located below the liquid level in the reaction tank body and an upper station for being located above the liquid level. The reaction tank body is equipped with a self-cleaning structure. The self-cleaning structure includes a cleaning part for contacting the light source at the upper station to clean microorganisms attached to the light source.

[0008] The beneficial effect of the above technical solution is that: the present invention proposes an improved mobile light source bioreactor, specifically, the reaction tank body is equipped with a self-cleaning structure, the self-cleaning structure includes a cleaning part, the cleaning part is used to contact the light source at the upper working position, and can clean the microorganisms attached to the light source to avoid affecting the propagation of light energy, thereby solving the problem that microorganisms may attach to the light source in the existing reactor and affect the propagation of light energy.

[0009] Furthermore, the self-cleaning structure also includes a spraying device for spraying the light source cleaned by the cleaning member.

[0010] The beneficial effect of the above technical solution is that after the cleaning piece cleans the light source, the light source is spray-washed to improve the cleaning effect.

[0011] Furthermore, the spray device is installed on the side wall of the reaction tank body, and the spray port of the spray device faces the interior of the reaction tank body.

[0012] The beneficial effects of the above technical solution are: on the one hand, it ensures a clean environment and avoids spraying to the outside of the reaction tank body; on the other hand, it flushes the microorganisms into the reaction tank body and can continue to be used.

[0013] Furthermore, the cleaning member is a brush roller rotatably mounted on the reaction tank body.

[0014] The beneficial effect of the above technical solution is that the brush roller has a good cleaning effect.

[0015] Furthermore, the driving mechanism includes an active transmission shaft rotatably mounted on the reaction tank body and a rotary power source for driving the active transmission shaft to rotate, a driving gear is mounted on the active transmission shaft, the brush roller is rotatably mounted on the reaction tank body through the roller shaft, and a transmission gear is mounted on the roller shaft for meshing with the driving gear.

[0016] The beneficial effect of the above technical solution is that when the rotating power source drives the active transmission shaft to rotate, the meshing transmission between the driving gear and the transmission gear can drive the roller shaft to rotate, that is, drive the brush roller to rotate, thereby improving the cleaning effect. At the same time, the roller shaft and the active transmission shaft share the same rotating power source, and the structure is simplified.

[0017] Furthermore, the driving mechanism includes an active transmission shaft rotatably mounted on the reaction pool body, at least one driven transmission shaft, and a rotational power source for driving the active transmission shaft to rotate, a driving wheel is mounted on the active transmission shaft, and each driven transmission shaft is mounted with a driven wheel, the active wheel and the driven wheel are both gears and meshed with racks, or the active wheel and the driven wheel are both sprockets and meshed with chains, and the light source is mounted on the rack or chain.

[0018] The beneficial effect of the above technical solution is that it facilitates the switching of the light source between the upper working station and the lower working station.

[0019] Furthermore, two racks or chains are arranged in parallel, the light source is a strip-shaped light source and is connected between the two racks or the two chains, two driving wheels are provided on the same driving transmission shaft and are respectively engaged with each rack or chain, and two driven wheels are provided on the same driven transmission shaft and are respectively engaged with each rack or chain.

[0020] The beneficial effect of the above technical solution is that two racks or chains are used to make the light source a bar-shaped light source and connected between the two racks or two chains, thereby making the light source have sufficient length and can provide more sufficient light energy.

[0021] Furthermore, three driven transmission shafts are provided, and the three driven transmission shafts and the active transmission shaft are located at the four corners of the rectangular structure. The reaction pool body is a rectangular structure, and the rack or chain includes a horizontal section running horizontally and a vertical section running vertically, and the length of the horizontal section is greater than the length of the vertical section.

[0022] The beneficial effect of the above technical solution is that the light source can cover a larger irradiation area, ensuring that the microalgae can fully utilize light energy for photosynthesis and provide more dissolved oxygen for aerobic bacteria.

[0023] Furthermore, a water immersion sensor is provided on the light source for detecting whether the light source is immersed in liquid. The mobile light source bioreactor with a self-cleaning structure also includes a controller connected to the water immersion sensor and the light source control. The controller is used to receive the detection signal of the water immersion sensor and control the light source to turn on when the light source is immersed in liquid, and control the light source to turn off when the light source is out of the liquid surface.

[0024] The beneficial effect of the above technical solution is that the light source can be automatically turned on and off by the water immersion sensor and the controller, thereby saving electric energy and extending the service life of the light source.

[0025] Furthermore, an aeration system is provided in the reaction tank. The aeration system includes an aeration main pipe and at least two aeration branch pipes connected to the aeration main pipe. The aeration branch pipes are provided with a plurality of aeration holes.

[0026] The beneficial effect of the above technical solution is that it is convenient to replenish dissolved oxygen for the bacteria-algae symbiotic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A perspective view of a mobile light source bioreactor according to the present invention;

[0028] Figure 2 A perspective view of a mobile light source bioreactor according to the present invention;

[0029] Figure 3 A three-dimensional diagram of a movable light source mechanism in a movable light source bioreactor according to the present invention;

[0030] Figure 4 A three-dimensional diagram of the partial structure of the mobile light source mechanism and the self-cleaning structure in the mobile light source bioreactor of the present invention;

[0031] Figure 5 This is a three-dimensional diagram of the aeration system in the mobile light source bioreactor of the present invention.

[0032] In the figure: 1. Reaction tank body; 11. Water inlet pipe; 12. Water outlet pipe; 2. Mobile light source mechanism; 21. Light source; 22. Rack; 23. Drive motor; 24. Active transmission shaft; 25. Active gear; 26. Driven transmission shaft; 27. Driven gear; 28. Mounting shaft; 29. Tensioner; 3. Self-cleaning structure; 31. Brush roller; 311. Roller shaft; 32. Transmission gear; 33. Spraying device; 4. Aeration system; 41. Air inlet pipe; 42. Aeration main pipe; 43. Aeration branch pipe. DETAILED DESCRIPTION

[0033] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0034] Example 1 of the mobile light source bioreactor (hereinafter referred to as bioreactor) with a self-cleaning structure in the present invention:

[0035] The bioreactor in this embodiment has a self-cleaning structure, which includes a brush roller and a spray device. The brush roller contacts the light source that moves to the upper workstation to clean the microorganisms attached to the light source. The spray device sprays the light source cleaned by the brush roller to flush the microorganisms into the reaction tank to avoid affecting the propagation of light energy.

[0036] Specific as Figure 1 and Figure 2As shown, the bioreactor includes a reaction tank body 1, a movable light source mechanism 2, a self-cleaning structure 3, and an aeration system 4. The reaction tank body 1 is a rectangular parallelepiped structure, containing a mixture of bacteria and algae. The reaction tank body 1 is provided with an inlet pipe 11 and an outlet pipe 12. The inlet pipe 11 is lower than the outlet pipe 12. Sewage enters the reaction tank body 1 through the inlet pipe 11, and the treated sewage is discharged from the outlet pipe 12.

[0037] The mobile light source mechanism 2 is arranged inside the reaction cell body 1, as shown in FIG. Figure 2 and Figure 3 As shown, it includes a light source 21 and a driving mechanism that is transmission-connected to the light source 21 to drive the light source 21 to move. The light source 21 has a lower station for being located below the liquid level in the reaction pool body 1 and an upper station for being located above the liquid level in the moving stroke. Specifically, the driving mechanism includes a driving transmission shaft 24 rotatably mounted on the reaction pool body 1, three driven transmission shafts 26, and a rotary power source for driving the driving transmission shaft 24 to rotate. The rotary power source in this embodiment is a driving motor 23. Furthermore, a driving wheel is mounted on the driving transmission shaft 24, and a driven wheel is mounted on each driven transmission shaft 26. The driving wheel is a driving gear 25, and the driven wheel is a driven gear 27. A rack 22 is meshed and mounted on the driving gear 25 and the driven gear 27. The rack 22 is composed of a plurality of tooth plates, and the whole is flexible and can be bent.

[0038] Furthermore, two parallel racks 22 are provided. The light source 21 is a bar-shaped light source and is connected between the two racks 22. Specifically, the ends of the light source 21 are respectively fixed to the individual tooth plates of the two racks 22. The multiple bar-shaped light sources 21 are arranged in parallel at a predetermined distance. Two driving gears 25 are provided on the same driving transmission shaft 24, one meshing with each rack 22. Two driven gears 27 are provided on the same driven transmission shaft 26, one meshing with each rack 22. The three driven transmission shafts 26 and the driving transmission shaft 24 are located at the four corners of the rectangular structure, so that the racks 22 include a horizontal section that runs horizontally and a vertical section that runs vertically. The horizontal section is longer than the vertical section. This also divides the light source 21 into two horizontally arranged upper and lower layers. The liquid level of the bacterial-algae mixture in the reaction tank body 1 is located between the upper and lower layers of light sources 21, i.e., the lower layer of light sources 21 is immersed in the mixture, while the upper layer of light sources 21 is exposed to air.

[0039] like Figure 2 and Figure 3As shown, the lower part of the reaction tank body 1 is rotatably mounted with a mounting shaft 28, which is located below the rack 22. Two tensioning pulleys 29 are mounted on the mounting shaft 28, and the two tensioning pulleys 29 are respectively engaged with each rack 22 to ensure the transmission effect. When in use, the driving motor 23 drives the main transmission shaft 24 and the driving gear 25 to rotate. Under the action of the tensioning pulley 29, the tensioned rack 22 drives the driven gear 27 on the driven transmission shaft 26 to rotate synchronously, with a transmission ratio of 1. The multiple strip-shaped light sources 21 fixed between the two racks 22 also perform a cyclic reciprocating motion, thereby continuously switching between the upper and lower stations, ensuring transmission efficiency while reducing the number of light source arrangements. In addition, due to the synchronous transmission of the double racks and the hollow structure, the transmission is ensured without affecting the full mixing of sewage and bacteria and algae.

[0040] Furthermore, a water immersion sensor is provided on the light source 21 for detecting whether the light source 21 is immersed in liquid. The bioreactor also includes a controller connected to the water immersion sensor and the light source 21. The controller is used to receive the detection signal of the water immersion sensor and control the light source 21 to turn on when the light source 21 is immersed in liquid, and control the light source 21 to turn off when the light source 21 is out of the liquid surface, thereby saving electric energy and extending the service life of the light source 21.

[0041] The reaction cell body 1 is provided with the above-mentioned self-cleaning structure 3, such as Figure 2 and Figure 4 As shown, the self-cleaning structure 3 includes a cleaning member for contacting the light source 21 in the upper working position to clean the microorganisms attached to the light source 21. The cleaning member in this embodiment is a brush roller 31 rotatably mounted on the reaction tank body 1. The brush roller 31 is arranged on the side of the active transmission shaft 24 and is rotatably mounted on the reaction tank body 1 through roller shafts 311 at both ends. A transmission gear 32 is mounted on the roller shaft 311 and is meshed with the active gear 25. The transmission ratio is 5 to 6. When the moving light source mechanism 2 is working, the brush roller 31 is driven to rotate. When the light source 21 moves to contact the brush roller 31, the bacteria and algae microorganisms attached to the light source are cleaned by the brush.

[0042] The self-cleaning structure 3 also includes a spraying device 33 for spraying the light source 21 cleaned by the brush roller 31. The spraying device 33 is installed on the side wall of the reaction tank body 1, and the spraying port of the spraying device 33 is facing the interior of the reaction tank body 1. On the one hand, it ensures a clean environment and avoids spraying to the outside of the reaction tank body 1. On the other hand, it flushes the microorganisms into the reaction tank body 1 for continued use. The self-cleaning structure 3 can prevent the light source from being affected by the attachment of bacteria and algae microorganisms, and the brush roller 31 does not require an additional power source to drive, and the structure is simple.

[0043] In the bacterial-algal symbiotic system, microalgae can provide dissolved oxygen for aerobic bacteria, but a small amount of aeration is still required. Therefore, an aeration system 4 is provided in the reaction tank body 1. Figure 2 and Figure 5 As shown, the aeration system 4 includes an air inlet pipe 41, an aeration main pipe 42 and an aeration branch pipe 43 vertically connected to the aeration main pipe 42. The aeration branch pipe 43 is provided with a plurality of aeration holes. Air enters the aeration main pipe 42 through the air inlet pipe 41 and finally enters the reaction tank body 1 through the aeration holes on the aeration branch pipe 43. While replenishing dissolved oxygen for the bacteria-algae symbiotic system, it also plays a stirring role, so that the sewage is in full contact with the bacteria and algae.

[0044] The working principle of the bioreactor in the present invention is as follows:

[0045] When the bioreactor is in use, sewage enters the reaction tank body 1 through the water inlet pipe 11, and the light source 21 moves with the rack 22. When the light source 21 moves out of the water surface (i.e., moves to the upper working position), it is turned off, and when it is immersed in water (i.e., moves to the lower working position), it is turned on. The microalgae make full use of light energy for photosynthesis, providing dissolved oxygen for aerobic bacteria; in addition, air enters the aeration main pipe 42 through the air inlet pipe 41, and finally enters the reaction tank body 1 through the micropores on the aeration branch pipe 43, replenishing a small amount of dissolved oxygen for the bacteria-algae symbiotic system. When the light source 21 at the upper working position moves and contacts the brush roller 31, the bacteria and algae microorganisms attached to the light source 21 are cleaned by the brush, and at the same time, the spraying device 33 is turned on to flush them into the reaction tank body 1, and the treated sewage mixture is discharged from the reactor through the outlet pipe 12.

[0046] Example 2 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This example provides a different arrangement of aeration branch pipes. Unlike Example 1, the angle between the aeration branch pipes and the aeration main pipe is an acute angle, and the aeration branch pipes are arranged in parallel.

[0047] Example 3 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This example provides a different structural composition of the bioreactor. Unlike Example 1, the bioreactor may not include an aeration system when the microalgae can fully provide dissolved oxygen for aerobic bacteria without the need for aeration.

[0048] Example 4 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This example provides a different control method for the light source. Unlike Example 1, no water immersion sensor is provided on the light source, and the light source is a normally-on light source.

[0049] Example 5 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This example provides a different arrangement of the driven transmission shaft. Unlike Example 1, two driven transmission shafts are provided, which are arranged in a triangle with the driving transmission shaft.

[0050] Example 6 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This example provides other alternatives to the rack. Unlike Example 1, the rack is replaced by a chain, and both the driving wheel and the driven wheel are sprockets.

[0051] Example 7 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This example provides other arrangements of racks or chains. Unlike Examples 1 and 6, only one rack or chain is provided. At this time, the light source can be a block or columnar light source, and only one driving wheel on the same driving transmission shaft and one driven wheel on the same driven transmission shaft are provided.

[0052] Example 8 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This embodiment provides a different form of driving mechanism. Unlike Example 1, the driving mechanism includes an intermediate gear and racks arranged on the left and right sides of the intermediate gear and respectively engaged with the intermediate gear. The racks are vertically arranged and the light source is installed on the racks. As the intermediate gear rotates forward and backward, the racks on both sides move up and down, driving the light sources thereon to move up and down alternately, switching between the upper workstation and the lower workstation.

[0053] Example 9 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This example provides different driving modes for the brush roller. Unlike Example 1, the brush roller is equipped with an independent driving source, such as a motor, a pneumatic motor or a hydraulic motor.

[0054] Example 10 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This embodiment provides a different form of the rotating power source in the driving mechanism. Unlike Example 1, the rotating power source is a pneumatic motor. Of course, in other embodiments, the rotating power source can also be a hydraulic motor.

[0055] Example 11 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This embodiment provides different forms of cleaning parts. Unlike Example 1, the cleaning part is a sponge. Of course, in other embodiments, the cleaning part can also be a flannel.

[0056] Example 12 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This embodiment provides different installation methods for the spray device. Unlike Example 1, the spray device is not installed on the reaction tank body, but has an independent fixed bracket that can be fixed to the side of the reaction tank body. At the same time, when conditions permit, for example, when a receiving container is provided, the spray port can also face outward to flush the microorganisms to the outside of the reaction tank body and into the receiving container.

[0057] Example 13 of the mobile light source bioreactor with a self-cleaning structure in the present invention: This embodiment provides different component structures of the self-cleaning structure. Unlike Example 1, the self-cleaning structure does not include a spray device and is only composed of a cleaning part. After the light source comes into contact with the cleaning part and enters below the liquid surface again, the microorganisms can be integrated into the mixed liquid.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A mobile light source bioreactor with a self-cleaning structure, comprising a reaction tank body and a mobile light source mechanism, the mobile light source mechanism comprising a light source and a driving mechanism connected to the light source for driving the light source to move, the light source having a lower station for being located below the liquid level in the reaction tank body and an upper station for being located above the liquid level in the moving stroke of the light source, characterized in that: The reaction tank body is equipped with a self-cleaning structure, which includes a cleaning part for contacting the light source at the upper working position to clean the microorganisms attached to the light source; a water immersion sensor is provided on the light source for detecting whether the light source is immersed in liquid. The mobile light source bioreactor with a self-cleaning structure also includes a controller connected to the water immersion sensor and the light source control. The controller is used to receive the detection signal of the water immersion sensor and control the light source to turn on when the light source is immersed in liquid, and control the light source to turn off when the light source is out of the liquid surface.

2. The mobile light source bioreactor with a self-cleaning structure according to claim 1, characterized in that: The self-cleaning structure also includes a spraying device for spraying the light source cleaned by the cleaning member.

3. The mobile light source bioreactor with a self-cleaning structure according to claim 2, characterized in that: The spray device is installed on the side wall of the reaction tank body, and the spray port of the spray device faces the interior of the reaction tank body.

4. The mobile light source bioreactor with a self-cleaning structure according to any one of claims 1 to 3, characterized in that: The cleaning part is a brush roller rotatably mounted on the reaction tank body.

5. The mobile light source bioreactor with a self-cleaning structure according to claim 4, characterized in that: The driving mechanism includes an active transmission shaft rotatably mounted on the reaction tank body and a rotary power source for driving the active transmission shaft to rotate. A driving gear is mounted on the active transmission shaft. The brush roller is rotatably mounted on the reaction tank body through a roller shaft. A transmission gear is mounted on the roller shaft for meshing with the driving gear.

6. The mobile light source bioreactor with a self-cleaning structure according to any one of claims 1 to 3, characterized in that: The driving mechanism includes a driving transmission shaft rotatably mounted on the reaction pool body, at least one driven transmission shaft, and a rotary power source for driving the driving transmission shaft to rotate. A driving wheel is mounted on the driving transmission shaft, and each driven transmission shaft is mounted with a driven wheel. The driving wheel and the driven wheel are both gears and meshed with racks, or the driving wheel and the driven wheel are both sprockets and meshed with chains. The light source is mounted on the rack or chain.

7. The mobile light source bioreactor with a self-cleaning structure according to claim 6, characterized in that: There are two racks or chains arranged in parallel, the light source is a strip-shaped light source and is connected between the two racks or the two chains, two driving wheels are provided on the same driving transmission shaft and are respectively engaged with each rack or chain, and two driven wheels are provided on the same driven transmission shaft and are respectively engaged with each rack or chain.

8. The mobile light source bioreactor with a self-cleaning structure according to claim 6, characterized in that: There are three driven transmission shafts, and the three driven transmission shafts and the active transmission shaft are located at the four corners of the rectangular structure. The reaction pool body is a rectangular structure, and the rack or chain includes a horizontal section running horizontally and a vertical section running vertically. The length of the horizontal section is greater than the length of the vertical section.

9. The mobile light source bioreactor with a self-cleaning structure according to any one of claims 1 to 3, characterized in that: The reaction tank is provided with an aeration system, which includes an aeration main pipe and at least two aeration branches connected to the aeration main pipe. The aeration branches are provided with a plurality of aeration holes.

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