Circulating type fishery tail water purification equipment based on photosynthetic microorganisms

Abstract

The invention relates to the technical field of fishery breeding tail water treatment, and discloses circulating fishery tail water purification equipment based on photosynthetic microorganisms, the circulating fishery tail water purification equipment comprises a photosynthetic reaction treatment box and a biomass collection box, an LED light source module and a lamp tube surface cleaning assembly are arranged in the photosynthetic reaction treatment box, and a waste gas collection and circulation assembly is arranged at the top of the photosynthetic reaction treatment box; an inclined plate type grating plate and a grating plate impurity scraping assembly are arranged in the biomass collecting box, and an inner circulation and outer discharge assembly of photosynthetic microorganisms is arranged at the bottom of the biomass collecting box. The lamp tube surface cleaning assembly conducts multi-dimensional cleaning on the surface of a light source through linear and rotary composite motion, and the illumination efficiency is guaranteed; carbon-rich waste gas is recycled through the waste gas collecting and circulating assembly, dehumidified and then re-injected into the water body, and carbon source circulation is achieved; the grating plate impurity scraping component and the internal circulation component are used for regularly cleaning the blockage of the grating and reflowing high-activity strains, so that the stable operation of the system is maintained, and the purification efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of aquaculture wastewater treatment technology, specifically to a circulating aquaculture wastewater purification device based on photosynthetic microorganisms. Background Technology

[0002] With the increasing density of aquaculture, the environmental pressure caused by the discharge of aquaculture wastewater is growing. Bioremediation of wastewater using photosynthetic microorganisms can effectively remove nitrogen and phosphorus nutrients and reduce chemical oxygen demand, making it a promising ecological remediation technology.

[0003] However, existing photosynthetic reactors have some shortcomings in operation. First, the growth and metabolism of photosynthetic microorganisms depend on sufficient light. When the light source components are immersed in water rich in microorganisms for extended periods, biofilms and dirt easily adhere to their surfaces. These deposits block light penetration, leading to a significant decrease in light energy utilization and severely impacting purification efficiency. Existing equipment typically lacks efficient automatic cleaning mechanisms; relying solely on manual cleaning is time-consuming, labor-intensive, and difficult to maintain a consistent cleaning frequency. While some devices have simple scrapers, they often only remove loose surface dirt, failing to thoroughly remove stubborn biofilms. Furthermore, the cleaning drive mechanism itself is susceptible to corrosion from water impurities, leading to mechanical jamming.

[0004] Secondly, photosynthetic microorganisms consume carbon sources and produce oxygen during metabolic reactions. Existing devices typically employ an open structure, allowing oxygen and unused carbon dioxide produced during the reaction to escape directly into the atmosphere, resulting in a waste of carbon and oxygen sources. Simultaneously, the bioheat generated during the reaction is also lost with the gases, making it difficult to maintain a suitable reaction temperature. The lack of a gas recycling mechanism also leads to poor mixing of the water, easily creating dead zones in the reaction. Furthermore, if the gas is directly recovered, the large amount of water vapor it carries can easily cause corrosion and damage to the downstream gas pump and pipelines.

[0005] Finally, the mixture after the reaction contains a large number of suspended bacteria. Existing equipment exhibits unstable solid-liquid separation, and the micropores of the filter components are easily clogged by high-concentration bacterial sludge, leading to poor effluent flow. There is a lack of effective activity protection and reflux mechanisms for collecting and settling bacterial sludge. Ordinary transfer pumps generate strong shear forces during transport, which can easily damage the cell walls of microorganisms, resulting in reduced activity of the refluxed bacteria and making it difficult to maintain a stable concentration of dominant bacteria in the reaction system, while also wasting biomass resources. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a circulating aquaculture wastewater purification device based on photosynthetic microorganisms. This device solves the problems in existing photosynthetic reaction devices, such as the easy adhesion of biofilms to the surface of the light source components leading to reduced light utilization, poor effectiveness of conventional cleaning methods, direct emission of reaction waste gas resulting in waste of carbon source and heat energy, susceptibility of the gas recovery system to moisture corrosion, easy clogging of the solid-liquid separation grid, and reduced activity due to shear force damage during microbial reflux.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A circulating aquaculture wastewater purification device based on photosynthetic microorganisms includes a photosynthetic reaction treatment tank and a biomass collection tank. LED light source modules and lamp cleaning components are fixedly connected to both ends of the photosynthetic reaction treatment tank. A waste gas collection and circulation component is installed on the top of the photosynthetic reaction treatment tank. Multiple inclined grating plates are fixedly connected inside the biomass collection tank. Two drive components are installed on the outer sides of both ends of the biomass collection tank to drive the impurity scraping component of the grating plates inside the biomass collection tank. A sludge collection hopper is fixedly connected to the bottom of the biomass collection tank, and an internal circulation and external discharge component for photosynthetic microorganisms is installed at the bottom of the sludge collection hopper. The lamp tube surface cleaning assembly includes a connecting plate, which is slidably connected to the inside of the photosynthetic reaction treatment box. Multiple fixing rings are fixedly connected to both sides of the connecting plate. Circular scrapers are fixedly connected to the inner sides of the multiple fixing rings. Multiple spiral grooved circular rings are rotatably connected to the inner side of the connecting plate. Circular brushes are fixedly connected to the inner sides of the multiple spiral grooved circular rings. The multiple circular brushes are slidably connected to the surface of the LED light source module.

[0008] Preferably, the lamp tube exterior cleaning assembly further includes two first fixing plates, which are respectively fixedly connected to the inner ends of the photosynthetic reaction treatment box. Each of the two first fixing plates has a stainless steel threaded rod rotatably connected to its inner side and a limit rod fixedly connected to it. The two ends of the connecting plate are respectively threaded to the outer sides of the two stainless steel threaded rods. Two limit sliders are fixedly connected to the inner sides of both ends of the connecting plate. Multiple limit sliders are slidably connected to the inner sides of the two limit rods. Waterproof soft rubber blocks are provided between the tops of the two stainless steel threaded rods and the two limit rods and the top of the photosynthetic reaction treatment box. Worm gears are fixedly connected to the top ends of the two stainless steel threaded rods. A protective frame is fixedly connected to the outer side of the top of the photosynthetic reaction treatment box. A double-headed worm gear is rotatably connected inside the protective frame. A first drive motor is fixedly connected to the outer side of one end of the protective frame. One end of the double-headed worm gear is fixedly connected to the output end of the first drive motor. The two ends of the double-headed worm gear are respectively meshed with the outer sides of the two worm gears.

[0009] Preferably, the impurity scraping assembly for the grid plate includes two first connecting rods, which are slidably connected to the inner sides of both ends of the plurality of inclined grid plates. A plurality of connecting blocks are fixedly connected to the bottom sides of each of the two first connecting rods. A plurality of soft rubber scrapers are fixedly connected between the plurality of connecting blocks. The plurality of soft rubber scrapers are slidably connected to both sides of the plurality of inclined grid plates. A fixed slider is fixedly connected to the side of each of the plurality of connecting blocks away from the soft rubber scrapers. The plurality of fixed sliders are slidably connected to the inner sides of both ends of the biomass collection box.

[0010] Preferably, the drive assembly includes a lifting protective shell, which is fixedly connected to the outside of the biomass collection box. Both ends of the lifting protective shell are rotatably connected to pulleys on their inner sides. A belt is fitted on the outer side of the two pulleys. A T-shaped waterproof belt is fixedly connected to the outer side of the belt. One of the fixed sliders is fixedly connected to the outer side of the T-shaped waterproof belt. A second drive motor is fixedly connected to the outer side of the end of the lifting protective shell. One of the pulleys is fixedly connected to the output end of the second drive motor.

[0011] Preferably, the internal circulation and external discharge component of the photosynthetic microorganisms includes a low-shear reflux pump, which is fixedly connected to the bottom inner side of the sludge collection hopper. The output end of the low-shear reflux pump is fixedly connected to a second three-way valve. One output end of the second three-way valve is fixedly connected to a sludge discharge branch pipe, and the other output end of the second three-way valve is fixedly connected to a microbial reflux pipe. The microbial reflux pipe is fixedly connected to the bottom inner side of the photosynthetic reaction treatment box.

[0012] Preferably, the waste gas collection and circulation assembly includes two gas collection hoppers, which are respectively fixedly connected to the inner sides of both ends of the photosynthetic reaction treatment box. A dehumidification shell is fixedly connected to the top of each of the two gas collection hoppers. A baffle plate is fixedly connected inside each of the two dehumidification shells. A filter screen is fixedly connected inside the top of each dehumidification shell, and a spiral fan is rotatably connected to both. A waste gas delivery pipe is fixedly connected to the outside of the photosynthetic reaction treatment box. The two input ends of the waste gas delivery pipe are respectively fixedly connected to the inner tops of the two dehumidification shells. One end of the photosynthetic reaction treatment box is fixedly connected to... The device has a base plate, an air pump is fixedly connected to the outer side of the base plate, a first three-way valve is fixedly connected to the output end of the air pump, an exhaust gas delivery pipe is fixedly connected to the input end of the first three-way valve, an exhaust gas output pipe is fixedly connected to one of the output ends of the first three-way valve, a gas delivery pipe is fixedly connected to the other output end of the first three-way valve, an aeration disc is fixedly connected to the end of the gas delivery pipe away from the first three-way valve, a protective bottom shell is fixedly connected to the bottom of the photosynthetic reaction treatment box, the aeration disc is fixedly connected to the inner side of the protective bottom shell, and multiple micro-hole nozzles are provided on the inner side of the aeration disc.

[0013] Preferably, a third drive motor is fixedly connected to the outer side of the photosynthetic reaction processing box, a second connecting rod is rotatably connected to the inner side of the photosynthetic reaction processing box, a plurality of stirring blades are fixedly connected to the outer side of the second connecting rod, one end of the second connecting rod is fixedly connected to the output end of the third drive motor, a protective shell is fixedly connected to the outer side of the photosynthetic reaction processing box, and the third drive motor is fixedly connected to the inner side of the protective shell.

[0014] Preferably, a second connecting pipe is fixedly connected to the inner side of one end of the photosynthetic reaction treatment box, and a primary filter box is fixedly connected to the other end of the second connecting pipe. A water inlet pipe is fixedly connected to the inner side of the primary filter box away from the photosynthetic reaction treatment box. A fixed base plate is fixedly connected to the inside of the primary filter box near the water inlet pipe. Two impurity collection frames are provided between the side of the fixed base plate and the primary filter box. The two impurity collection frames are slidably connected to the inner side of the primary filter box. A second fixed plate is fixedly connected to the inner side of the bottom of the end near the photosynthetic reaction treatment box.

[0015] Preferably, rotating rings are rotatably connected to the inner sides of both ends of the connecting plate, and threaded soft rubber brushes are fixedly connected to the inner sides of the two rotating rings. The two threaded soft rubber brushes are respectively threaded to the outer sides of the two stainless steel threaded rods.

[0016] Preferably, a first connecting pipe is provided inside the photosynthetic reaction treatment box and the biomass collection box, and a water outlet pipe is fixedly connected to the end of the biomass collection box away from the photosynthetic reaction treatment box. Multiple bases are fixedly connected to the bottom of the primary filter box, the photosynthetic reaction treatment box and the biomass collection box.

[0017] This invention provides a circulating aquaculture wastewater purification device based on photosynthetic microorganisms. It has the following beneficial effects: 1. This invention, by setting up a lamp tube surface cleaning component, utilizes a first drive motor to drive a double-headed worm gear and worm wheel to rotate, thereby driving the stainless steel threaded rod to rotate. This causes the connecting plate to reciprocate along the axial direction of the LED light source module. During the movement of the connecting plate, the circular scraper linearly scrapes the surface of the light source. At the same time, the spiral grooved ring converts the linear motion into rotational force to drive the circular brush to rotate and clean. This can remove biofilm and dirt attached to the surface of the light source from multiple dimensions, ensuring light transmittance. Furthermore, the rotating ring drives the threaded soft rubber brush to perform synchronous self-cleaning of the stainless steel threaded rod, preventing the transmission components from jamming due to dirt accumulation.

[0018] 2. This invention, by setting up a waste gas collection and circulation component, uses a gas collection hopper to capture the oxygen-rich and unreacted carbon dioxide waste gas generated at the top of the photosynthetic reaction treatment tank. After the water vapor and impurities are removed by the baffles and filter screen inside the dehumidification shell, the gas is pressurized by an air pump and reinjected into the photosynthetic reaction treatment tank in the form of microbubbles through the aeration disc at the bottom. This realizes the recycling of carbon source gas and assists in water stirring. At the same time, it recovers reaction heat energy to maintain water temperature, reduces operating energy consumption and improves photosynthetic reaction efficiency. In addition, the dehumidification structure effectively protects the gas path system from moisture corrosion.

[0019] 3. This invention sets up a biomass collection tank and a matching internal circulation and external discharge assembly. It uses an inclined plate grid to separate the solid and liquid components of the reaction mixture. The soft rubber scraper driven by the drive assembly periodically removes the accumulated bacterial sludge on the grid surface to prevent the filter channel from clogging. A low shear force reflux pump is used to return the high concentration of active bacterial sludge from the bottom of the sludge collection hopper to the front reaction zone for inoculation while protecting the integrity of the microbial cell structure. This achieves the targeted recovery and utilization of biomass resources while maintaining the concentration of the dominant bacterial population in the system. Attached Figure Description

[0020] Figure 1 This is a front perspective view of the overall device of the present invention; Figure 2 This is a perspective view of the rear of the overall device of the present invention; Figure 3 This is a schematic diagram of the internal structure of the photosynthetic reaction treatment box of the present invention; Figure 4 This is a schematic diagram of the overall structure of the lamp tube exterior cleaning assembly of the present invention; Figure 5 This is a schematic diagram of the overall structure of the driving part of the lamp tube surface cleaning component of the present invention; Figure 6 This is a detailed structural diagram of the cleaning portion of the LED light source module tube of the present invention; Figure 7 This is a schematic diagram of the overall structure of the waste gas collection section of the present invention; Figure 8 This is a schematic diagram of the waste gas recirculation and conveying section of the present invention; Figure 9 This is a schematic diagram of the overall internal structure of the biomass collection box of the present invention; Figure 10 This is a schematic diagram of the overall structure of the soft rubber scraper of the present invention; Figure 11 This is a schematic diagram of the overall structure of the drive component of the present invention; Figure 12 This is a schematic diagram of the overall structure of the photosynthetic microorganism internal circulation and external excretion component of the present invention; Figure 13This is a schematic diagram of the overall internal structure of the primary filter box of the present invention; Figure 14 This is a schematic diagram of the overall structure of the stirring part of the present invention; Figure 15 This is a schematic diagram of the LED light source module structure of the present invention; Figure 16 For the present invention Figure 5 Enlarged view of A in the middle; Figure 17 For the present invention Figure 11 A magnified view of B in the middle.

[0021] The components include: 1. Primary filter box; 2. Photosynthetic reaction treatment box; 3. Biomass collection box; 4. Base; 5. Inlet pipe; 6. Outlet pipe; 7. Protective frame; 8. Gas collection hopper; 9. Dehumidification shell; 10. Exhaust gas conveying pipe; 11. Protective shell; 12. Lifting protective shell; 13. Base plate; 14. Air pump; 15. Baffle plate; 16. Gas conveying pipe; 17. First fixing plate; 18. Stainless steel threaded rod; 19. Limiting rod; 20. LED light source module; 21. Connecting plate; 22. Double-headed worm gear; 23. First drive motor; 24. Worm gear; 25. Waterproof soft rubber block; 26. Fixing ring; 27. Spiral grooved ring; 28. Ring scraper; 29. ​​Ring brush; 30. Filter screen; 31. Spiral fan; 32. ... 33. Three-way valve; 34. Exhaust gas output pipe; 35. Protective bottom shell; 36. Aeration disc; 37. Micro-orifice nozzle; 38. First connecting pipe; 39. Low shear force reflux pump; 40. Second three-way valve; 41. Sludge discharge branch pipe; 42. Microbial inoculum reflux pipe; 43. Inclined grating plate; 44. Sludge collection hopper; 45. First connecting rod; 46. Connecting block; 47. Fixed slider; 48. Soft rubber scraper; 49. Belt; 50. Pulley; 51. Second drive motor; 52. Second connecting pipe; 53. Fixed bottom plate; 54. Impurity collection frame; 55. Second fixed plate; 56. Third drive motor; 57. Second connecting rod; 58. Stirring blade; 59. Limiting slider; 60. Rotating ring; 61. Threaded soft rubber brush; 62. T-shaped waterproof tape. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 -Appendix Figure 6 and attached Figure 15This invention provides a circulating aquaculture wastewater purification device based on photosynthetic microorganisms, including a photosynthetic reaction treatment tank 2 and a biomass collection tank 3. Both ends of the photosynthetic reaction treatment tank 2 are fixedly connected to LED light source modules 20 and are equipped with lamp tube surface cleaning components. The top of the photosynthetic reaction treatment tank 2 is equipped with a waste gas collection and circulation component. The biomass collection tank 3 is fixedly connected to multiple inclined plate grids 42. Both ends of the biomass collection tank 3 are equipped with two drive components to drive the grid plate impurity scraping component inside the biomass collection tank 3. The bottom of the biomass collection tank 3 is fixedly connected to a mud collection hopper 43, and the bottom of the mud collection hopper 43 is equipped with an internal circulation and external discharge component for photosynthetic microorganisms. The lamp tube surface cleaning assembly includes a connecting plate 21, which is slidably connected to the inside of the photosynthetic reaction treatment box 2. Multiple fixing rings 26 are fixedly connected to both sides of the connecting plate 21. Circular scrapers 28 are fixedly connected to the inner side of each of the multiple fixing rings 26. Multiple spiral grooved circular rings 27 are rotatably connected to the inner side of the connecting plate 21. Circular brushes 29 are fixedly connected to the inner side of each of the multiple spiral grooved circular rings 27. The multiple circular brushes 29 are slidably connected to the surface of the LED light source module 20.

[0024] Specifically, the photosynthetic reaction treatment tank 2 provides a closed reaction space for photosynthetic microorganisms to treat the wastewater; the LED light source module 20 provides the necessary light energy for the photosynthesis of microorganisms; the waste gas collection and circulation assembly collects the carbon-rich waste gas from the top of the tank and re-injects it into the bottom to achieve carbon source circulation and heat energy recovery; the inclined plate grid 42 is used to perform solid-liquid separation on the mixed liquid after reaction, and uses micropores to trap photosynthetic bacterial clusters; the external drive assembly of the biomass collection tank 3, together with the internal grid impurity scraping assembly, is used to periodically remove the bacterial sludge attached to the surface of the inclined plate grid 42 to prevent blockage. The mud collection hopper 43 is used to collect the high-concentration bacterial mud that has settled and been scraped off; the internal circulation and external discharge components of the photosynthetic microorganisms are used to return the highly active bacteria to the front end and discharge the aged bacterial mud; the connecting plate 21 serves as a carrier for the cleaning components and is used to drive each cleaning component to move along the lamp tube axis; the circular scraper 28 is used to linearly scrape the surface of the LED light source module 20 to remove loose dirt; the spiral grooved ring 27 uses mechanical cooperation to convert the linear lifting force of the connecting plate 21 into rotational force, driving the circular brush 29 to rotate around the surface of the LED light source module 20, thereby achieving rotational brushing of stubborn biofilm.

[0025] The lamp tube exterior cleaning assembly also includes two first fixing plates 17, which are respectively fixedly connected to the two ends of the interior of the photosynthetic reaction treatment box 2. Each of the two first fixing plates 17 has a stainless steel threaded rod 18 rotatably connected to its inner side and a limit rod 19 fixedly connected to its inner side. The two ends of a connecting plate 21 are respectively threaded to the outer sides of the two stainless steel threaded rods 18. Two limit sliders 58 are fixedly connected to the inner sides of both ends of the connecting plate 21. Multiple limit sliders 58 are slidably connected to the inner sides of the two limit rods 19. The two stainless steel threaded rods 18... Waterproof soft rubber blocks 25 are provided between the top of the two limit rods 19 and the top of the photosynthetic reaction treatment box 2. Worm gears 24 are fixedly connected to the top of the two stainless steel threaded rods 18. A protective frame shell 7 is fixedly connected to the outer side of the top of the photosynthetic reaction treatment box 2. A double-headed worm gear 22 is rotatably connected inside the protective frame shell 7. A first drive motor 23 is fixedly connected to the outer side of one end of the protective frame shell 7. One end of the double-headed worm gear 22 is fixedly connected to the output end of the first drive motor 23. The two ends of the double-headed worm gear 22 are respectively meshed with the outer sides of the two worm gears 24.

[0026] Specifically, the first drive motor 23 provides the initial power for the operation of the cleaning components; the double-headed worm gear 22 and worm wheel 24 form a transmission group to convert the horizontal rotational motion of the motor into the synchronous vertical rotational motion of the two stainless steel threaded rods 18, and also serve to reduce speed and increase torque; the stainless steel threaded rods 18 drive the connecting plate 21 to reciprocate vertically through threaded engagement; the limiting rod 19 and the limiting slider 58 cooperate to limit the circumferential rotation of the connecting plate 21, ensuring that the connecting plate 21 can only rise and fall smoothly along the axial direction; the waterproof soft rubber block 25 is used to seal the mechanical penetration at the top of the box to prevent moisture inside the box from corroding the external motor and transmission components; the first fixing plate 17 is used to support and position the long shaft members at the bottom inside the box.

[0027] Please see the appendix Figure 9 and attached Figure 10 The impurity scraping assembly for the grid plate includes two first connecting rods 44, which are slidably connected to the inner sides of both ends of multiple inclined grid plates 42. Multiple connecting blocks 45 are fixedly connected to the bottom sides of both first connecting rods 44. Multiple soft rubber scrapers 47 are fixedly connected between the multiple connecting blocks 45. The multiple soft rubber scrapers 47 are slidably connected to both sides of the multiple inclined grid plates 42. Fixed sliders 46 are fixedly connected to the side of each connecting block 45 away from the soft rubber scrapers 47. The multiple fixed sliders 46 are slidably connected to the inner sides of both ends of the biomass collection box 3.

[0028] Specifically, the first connecting rod 44 serves as the main support frame of the entire scraping assembly, receiving power from the external drive assembly and driving the cleaning component below to reciprocate along the length of the inclined grating plate 42. The connecting block 45 serves as a fixed connection, securely mounting the soft rubber scraper 47 onto the first connecting rod 44 to ensure that the scraper maintains an appropriate contact angle with the grating surface. The soft rubber scraper 47 directly contacts the surface of the inclined grating plate 42, utilizing its flexible fit to forcibly scrape off and push the photosynthetic bacteria mud and solid impurities trapped on the grating surface into the mud collection hopper 43 during movement, preventing clogging of the grating gaps and ensuring filtration throughput. The fixed slider 46 works in conjunction with the inner wall of the biomass collection box 3 to limit and guide the movement trajectory of the scraping assembly, preventing the assembly from shifting or jamming during scraping and ensuring the stability of the cleaning operation.

[0029] Please see the appendix Figure 11 and attached Figure 17 The drive assembly includes a lifting protective shell 12, which is fixedly connected to the outside of the biomass collection box 3. Both ends of the lifting protective shell 12 are rotatably connected to pulleys 49. A belt 48 is sleeved on the outside of the two pulleys 49. A T-shaped waterproof belt 61 is fixedly connected to the outside of the belt 48. One of the fixed sliders 46 is fixedly connected to the outside of the T-shaped waterproof belt 61. A second drive motor 50 is fixedly connected to the outside of the end of the lifting protective shell 12. One of the pulleys 49 is fixedly connected to the output end of the second drive motor 50.

[0030] Specifically, the lifting protective shell 12 provides an installation fulcrum and external protection for the internal belt drive mechanism, preventing external foreign objects from interfering with the transmission operation; the second drive motor 50 serves as a power source, driving the active pulley 49 connected to the output end of the second drive motor 50 to rotate after startup; the pulley 49 and the belt 48 cooperate to form a transmission system, which converts the rotational motion of the second drive motor 50 into the cyclic linear motion of the belt 48 inside the lifting protective shell 12; the T-shaped waterproof belt 61 connects the belt 48 to the fixed slider 46, and at the same time uses its T-shaped structure to cover and seal the movement gaps on the side wall of the box, preventing sewage inside the biomass collection box 3 from seeping into the drive assembly and causing damage; the fixed slider 46 transmits the linear driving force from the T-shaped waterproof belt 61 to the internal grating plate impurity scraping assembly, thereby realizing the reciprocating scraping operation of the scraping assembly on the surface of the inclined grating plate 42.

[0031] Please see the appendix Figure 9 and attached Figure 12The internal circulation and external discharge components for photosynthetic microorganisms include a low-shear reflux pump 38, which is fixedly connected to the bottom inner side of the sludge collection hopper 43. The output end of the low-shear reflux pump 38 is fixedly connected to a second three-way valve 39. One output end of the second three-way valve 39 is fixedly connected to a sludge discharge branch pipe 40, and the other output end of the second three-way valve 39 is fixedly connected to a microbial reflux pipe 41, which is fixedly connected to the bottom inner side of the photosynthetic reaction treatment box 2.

[0032] Specifically, the low-shear reflux pump 38 is used to draw in and pressurize the high-concentration photosynthetic microbial sludge accumulated at the bottom of the sludge collection hopper 43, without mechanically shearing and damaging the microbial cell structure; the second three-way valve 39 serves as the control hub for fluid distribution, used to adjust the flow direction of the sludge according to system instructions; the inoculum reflux pipe 41 is used to transport most of the highly active inoculum back to the photosynthetic reaction treatment tank 2 for circulation inoculation under the conduction of the second three-way valve 39, so as to maintain the concentration of the dominant microbial community in the tank; the sludge discharge branch pipe 40 is used to discharge a small portion of the aged or excessively proliferating sludge to the outside when sludge discharge is required, so as to carry out biomass recycling.

[0033] Please see the appendix Figure 3 Appendix Figure 7 and attached Figure 8 The exhaust gas collection and circulation assembly includes two gas collection hoppers 8, which are fixedly connected to the inner sides of both ends of the photosynthetic reaction treatment box 2. A dehumidifying shell 9 is fixedly connected to the top of each of the two gas collection hoppers 8. A baffle plate 15 is fixedly connected inside each of the two dehumidifying shells 9. A filter screen 30 is fixedly connected to the top of each dehumidifying shell 9, and a spiral fan 31 is rotatably connected to each. An exhaust gas conveying pipe 10 is fixedly connected to the outside of the photosynthetic reaction treatment box 2. The two input ends of the exhaust gas conveying pipe 10 are fixedly connected to the top interiors of the two dehumidifying shells 9. A base plate 13 is fixedly connected to the outer side of one end of the photosynthetic reaction treatment box 2. An air pump 14 is fixedly connected to the outside of the 3. The output end of the air pump 14 is fixedly connected to a first three-way valve 32. The waste gas conveying pipe 10 is fixedly connected to the input end of the first three-way valve 32. One output end of the first three-way valve 32 is fixedly connected to a waste gas output pipe 33. The other output end of the first three-way valve 32 is fixedly connected to a gas conveying pipe 16. The end of the gas conveying pipe 16 away from the first three-way valve 32 is fixedly connected to an aeration disc 35. A protective bottom shell 34 is fixedly connected to the bottom of the photosynthetic reaction treatment box 2. The aeration disc 35 is fixedly connected to the inner side of the protective bottom shell 34. Multiple micro-hole nozzles 36 are provided on the inner side of the aeration disc 35.

[0034] Specifically, the collection hopper 8 is used to gather and capture the rising exhaust gas generated in the photosynthetic reaction treatment box 2, which mainly contains oxygen produced by photosynthesis and unreacted carbon dioxide, and to prevent it from escaping into the atmosphere; the dehumidification shell 9, together with the internal baffle 15, is used to construct a tortuous gas flow path, using the principle of physical collision condensation to remove a large amount of water vapor and droplets carried in the exhaust gas, preventing moisture from entering the gas path system and causing corrosion; the filter screen 30 is used to further intercept bioaerosols or tiny impurities entrained in the airflow; the spiral fan 31 is installed in the airflow channel to generate rotation using fluid power when the airflow passes through, assisting in gas-liquid centrifugal separation or accelerating airflow guidance; exhaust gas conveying Pipe 10 is used to guide and transmit the dehumidified and impurity-removed waste gas to the power convergence point; air pump 14 serves as the core power source to generate high-pressure airflow; the first three-way valve 32 serves as the airflow distribution and mixing hub, connecting the output airflow of air pump 14 with the recovered waste gas in waste gas delivery pipe 10, and discharging excess waste gas through waste gas output pipe 33 to balance the pressure; gas delivery pipe 16 is used to deliver the mixed carbon-rich gas to the bottom of the box; the protective bottom shell 34 is used to provide bottom support and anti-collision protection for aeration disc 35; aeration disc 35 and micro-hole nozzle 36 are used to release the recovered gas back into the water body in the form of micro-nano bubbles, supplementing the carbon source while using the upward force of the bubbles to assist in water mixing.

[0035] Please see the appendix Figure 3 and attached Figure 14 A third drive motor 55 is fixedly connected to the outer side of the middle part of the photosynthetic reaction processing box 2. A second connecting rod 56 is rotatably connected to the inner side of the middle part of the photosynthetic reaction processing box 2. Multiple stirring blades 57 are fixedly connected to the outer side of the second connecting rod 56. One end of the second connecting rod 56 is fixedly connected to the output end of the third drive motor 55. A protective shell 11 is fixedly connected to the outer side of the photosynthetic reaction processing box 2. The third drive motor 55 is fixedly connected to the inner side of the protective shell 11.

[0036] Specifically, the protective shell 11 is used to cover and protect the third drive motor 55, preventing water vapor, dust, or external objects from corroding or damaging the motor. The third drive motor 55 serves as the power source for the auxiliary stirring system, outputting rotational torque after startup. The second connecting rod 56 acts as a drive shaft, transmitting the rotational power of the third drive motor 55 through the wall to the depth inside the photosynthetic reaction treatment tank 2. The stirring blade 57 rotates synchronously with the rotation of the second connecting rod 56, driving the water flow in the tank through mechanical stirring, preventing the sedimentation of photosynthetic microbial flocs, and promoting full contact and mixing of nutrients and microorganisms in the tailwater, eliminating reaction dead zones.

[0037] Please see the appendix Figure 9 and attached Figure 13A second connecting pipe 51 is fixedly connected to the inner side of one end of the photosynthetic reaction treatment box 2. A primary filter box 1 is fixedly connected to the other end of the second connecting pipe 51. A water inlet pipe 5 is fixedly connected to the inner side of the primary filter box 1 away from the photosynthetic reaction treatment box 2. A fixed base plate 52 is fixedly connected to the inside of the primary filter box 1 near the water inlet pipe 5. Two impurity collection frames 53 are provided between the side of the fixed base plate 52 and the primary filter box 1. The two impurity collection frames 53 are slidably connected to the inner side of the primary filter box 1. A second fixed plate 54 is fixedly connected to the inner side of the bottom of the end near the photosynthetic reaction treatment box 2. A first connecting pipe 37 is provided inside the photosynthetic reaction treatment box 2 and the biomass collection box 3. A water outlet pipe 6 is fixedly connected to the end of the biomass collection box 3 away from the photosynthetic reaction treatment box 2. Multiple bases 4 are fixedly connected to the bottom of the primary filter box 1, the photosynthetic reaction treatment box 2, and the biomass collection box 3.

[0038] Specifically, the inlet pipe 5 is used to introduce the aquaculture wastewater to be treated into the primary filter box 1; the fixed base plate 52 is used to initially guide the incoming water flow, preventing the water flow from directly impacting the bottom of the box, and at the same time providing a support for the installation of internal components; the impurity collection frame 53, as a primary physical filtration component, is used to mechanically intercept and collect large particulate solid waste such as fish feces, uneaten feed, and leaves carried in the wastewater. The sliding connection design of the impurity collection frame 53 makes it easy to periodically pull out the impurity collection frame 53 for emptying and cleaning; the second fixed plate 54 is used to provide auxiliary support for the internal structure of the box or as an overflow... The flow baffle maintains a certain water level; the second connecting pipe 51 serves as an intermediate fluid channel, used to transport the wastewater after preliminary impurity removal from the primary filter box 1 to the photosynthetic reaction treatment box 2 for biochemical treatment; the first connecting pipe 37 connects the photosynthetic reaction treatment box 2 and the biomass collection box 3, allowing the mixed liquid after the reaction to flow smoothly to the rear end for solid-liquid separation; the outlet pipe 6 is used to discharge the clear purified water after filtration by the grid plate out of the system; the base 4 provides ground support for the three main bodies of the entire equipment, ensuring the stability of the equipment during operation and preventing the bottom from getting damp and corroded.

[0039] Please see the appendix Figure 5 and attached Figure 16 The inner sides of both ends of the connecting plate 21 are rotatably connected to rotating rings 59. The inner sides of the two rotating rings 59 are fixedly connected to threaded soft rubber brushes 60. The two threaded soft rubber brushes 60 are respectively threaded to the outer sides of the two stainless steel threaded rods 18.

[0040] Specifically, the rotating ring 59 serves as the mounting carrier, used to rotatably mount the threaded soft rubber brush 60 onto the connecting plate 21. This ensures that when the stainless steel threaded rod 18 rotates, the cleaning component can adaptively adjust or follow the rotation in accordance with the direction of the thread, avoiding mechanical jamming. The inner side of the threaded soft rubber brush 60 is provided with an internal thread structure that matches the stainless steel threaded rod 18. This ensures that the brush remains tightly fitted within the thread groove of the stainless steel threaded rod 18 during the lifting and lowering motion of the connecting plate 21 as it rotates with the rod. By utilizing relative motion, the brush can scrape and clean the lubricating grease, dirt, or attached water vapor and algae on the surface of the transmission screw in real time, thereby performing self-maintenance on the drive component itself and ensuring the long-term smooth operation of the transmission mechanism.

[0041] Working Principle: The circulating aquaculture wastewater purification equipment based on photosynthetic microorganisms introduces aquaculture wastewater into the primary filter box 1 through the inlet pipe 5. After entering the primary filter box 1, the wastewater passes through the impurity collection frame 53. The impurity collection frame 53 intercepts large particulate solid waste mixed in with the wastewater. The pre-filtered wastewater flows near the fixed base plate 52 and enters the photosynthetic reaction treatment box 2 through the second connecting pipe 51. The wastewater entering the photosynthetic reaction treatment box 2 undergoes photosynthesis under the light radiation emitted by the LED light source module 20. At this time, the third drive motor 55 is activated, which drives the second connecting rod 56 to rotate. The second connecting rod 56 drives the stirring blade 57 to rotate in the water. The rotation of the stirring blade 57 promotes water flow, prevents the sedimentation of photosynthetic microorganism flocs, and promotes the contact and mixing of nutrients and microorganisms.

[0042] While the photosynthetic reaction is underway, the first drive motor 23 is activated to maintain the light transmittance of the LED light source module 20. The first drive motor 23 drives the double-headed worm gear 22 to rotate, which in turn drives two worm wheels 24 to rotate synchronously, thereby driving two stainless steel threaded rods 18 to rotate synchronously. The rotation of the stainless steel threaded rods 18 drives the connecting plate 21 to reciprocate vertically inside the photosynthetic reaction processing chamber 2. The movement of the connecting plate 21 causes the circular scraper 28 to linearly scrape the surface of the LED light source module 20. Simultaneously, the lifting and lowering motion of the connecting plate 21, in conjunction with the mechanical structure of the spiral grooved ring 27, converts the linear driving force into rotational force, causing the circular brush 29 to rotate and brush around the surface of the LED light source module 20, removing stubborn biofilm. During the lifting and lowering process of the connecting plate 21, the rotating ring 59 drives the threaded soft rubber brush 60 to rotate on the surface of the stainless steel threaded rods 18, cleaning the threaded grooves on the surface of the stainless steel threaded rods 18.

[0043] The gas produced during the reaction, rich in oxygen and unreacted carbon dioxide, rises into the gas collection hopper 8. The gas then enters the dehumidification shell 9, where it is condensed and dehumidified by the baffle plate 15 and filtered through the filter screen 30. The air pump 14 starts, generating negative pressure to attract and pressurize the gas, which then flows through the first three-way valve 32. The first three-way valve 32 discharges part of the gas through the waste gas outlet pipe 33, and delivers the remaining gas through the gas delivery pipe 16 to the aeration disc 35 at the bottom. The microporous nozzle 36 releases the gas back into the water body, replenishing the carbon source and using the upward force of the bubbles to assist in stirring.

[0044] The reacted gas-liquid-solid mixture flows into the biomass collection tank 3 through the first connecting pipe 37. The mixture flows towards the inclined plate grid 42. The purified water passes through the micropores of the inclined plate grid 42 into the clean water side and is finally discharged through the outlet pipe 6. The trapped bacterial clumps and impurities adhere to the surface of the inclined plate grid 42. At this time, the second drive motor 50 is started, which drives the pulley 49 to rotate, driving the belt 48 and the T-shaped waterproof belt 61 to run. The T-shaped waterproof belt 61 drives the fixed slider 46 to move, and the fixed slider 46 drives the first connecting rod 44 and the soft rubber scraper 47 to slide on the surface of the inclined plate grid 42. The soft rubber scraper 47 scrapes off the bacterial mud adhering to the surface of the inclined plate grid 42 and pushes it into the mud collection hopper 43 at the bottom.

[0045] The bacterial sludge accumulated at the bottom of the sludge collection hopper 43 is sucked in and pressurized by the low-shear reflux pump 38. The bacterial sludge flows to the second three-way valve 39. As needed, the second three-way valve 39 transports a portion of the highly active bacteria back to the inlet of the photosynthetic reaction treatment tank 2 through the bacteria return pipe 41 for recycling to maintain the reaction concentration; the aged bacterial sludge is discharged through the sludge discharge branch pipe 40 for recycling.

[0046] The aquaculture wastewater enters the primary filter tank 1 through the inlet pipe 5, then enters the photosynthetic reaction treatment tank 2 through the second connecting pipe 51, and enters the biomass collection tank 3 through the first connecting pipe 37. After passing through the inclined plate grid 42, it becomes purified water and is finally discharged through the outlet pipe 6. Large particulate impurities are trapped in the impurity collection frame 53 inside the primary filter tank 1. The microbial sludge generated by the reaction is trapped by the inclined plate grid 42 in the biomass collection tank 3, scraped into the sludge collection hopper 43 by the soft rubber scraper 47, and finally transported by the low shear force return pump 38. After being diverted by the second three-way valve 39, a portion of the highly active bacteria is transported back into the photosynthetic reaction treatment tank 2 for circulation inoculation, while the other portion, a small portion of aged or excessively proliferating sludge, is discharged to the outside through the sludge discharge branch pipe 40.

Claims

1. A circulating aquaculture wastewater purification device based on photosynthetic microorganisms, characterized in that, The system includes a photosynthetic reaction processing box (2) and a biomass collection box (3). Both ends of the photosynthetic reaction processing box (2) are fixedly connected to LED light source modules (20) and are equipped with lamp tube surface cleaning components. The top of the photosynthetic reaction processing box (2) is equipped with a waste gas collection and circulation component. The biomass collection box (3) is fixedly connected to multiple inclined plate grids (42). Both ends of the biomass collection box (3) are equipped with two drive components to drive the grid plate impurity scraping component inside the biomass collection box (3). The bottom of the biomass collection box (3) is fixedly connected to a sludge hopper (43). The bottom of the sludge hopper (43) is equipped with an internal circulation and external discharge component for photosynthetic microorganisms. The lamp tube surface cleaning assembly includes a connecting plate (21), which is slidably connected to the inside of the photosynthetic reaction processing box (2). Multiple fixing rings (26) are fixedly connected to both sides of the connecting plate (21). A circular scraper (28) is fixedly connected to the inner side of each of the multiple fixing rings (26). Multiple spiral grooved rings (27) are rotatably connected to the inner side of the connecting plate (21). A circular brush (29) is fixedly connected to the inner side of each of the multiple spiral grooved rings (27). The multiple circular brushes (29) are slidably connected to the surface of the LED light source module (20).

2. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 1, characterized in that, The lamp tube exterior cleaning assembly also includes two first fixing plates (17), which are respectively fixedly connected to the two ends of the inside of the photosynthetic reaction treatment box (2). Each of the two first fixing plates (17) has a stainless steel threaded rod (18) rotatably connected to its inner side and a limiting rod (19) fixedly connected to its inner side. The two ends of the connecting plate (21) are respectively threaded to the outer sides of the two stainless steel threaded rods (18). Two limiting sliders (58) are fixedly connected to the inner sides of both ends of the connecting plate (21). Multiple limiting sliders (58) are slidably connected to the inner sides of the two limiting rods (19). The two stainless steel threaded rods (18) and... Waterproof soft rubber blocks (25) are provided between the top of the two limiting rods (19) and the top of the photosynthetic reaction treatment box (2). Worm gears (24) are fixedly connected to the top of the two stainless steel threaded rods (18). A protective frame shell (7) is fixedly connected to the outer side of the top of the photosynthetic reaction treatment box (2). A double-headed worm gear (22) is rotatably connected inside the protective frame shell (7). A first drive motor (23) is fixedly connected to the outer side of one end of the protective frame shell (7). One end of the double-headed worm gear (22) is fixedly connected to the output end of the first drive motor (23). The two ends of the double-headed worm gear (22) are respectively meshed and connected to the outer side of the two worm gears (24).

3. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 1, characterized in that, The impurity scraping assembly for the grid plate includes two first connecting rods (44), which are slidably connected to the inner sides of both ends of the plurality of inclined grid plates (42). A plurality of connecting blocks (45) are fixedly connected to the bottom sides of the two first connecting rods (44). A plurality of soft rubber scrapers (47) are fixedly connected between the plurality of connecting blocks (45). The plurality of soft rubber scrapers (47) are slidably connected to both sides of the plurality of inclined grid plates (42). A fixed slider (46) is fixedly connected to the side of the plurality of connecting blocks (45) away from the soft rubber scraper (47). The plurality of fixed sliders (46) are slidably connected to the inner sides of both ends of the biomass collection box (3).

4. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 3, characterized in that, The drive assembly includes a lifting protective shell (12), which is fixedly connected to the outside of the biomass collection box (3). Both ends of the lifting protective shell (12) are rotatably connected to pulleys (49). A belt (48) is sleeved on the outside of the two pulleys (49). A T-shaped waterproof belt (61) is fixedly connected to the outside of the belt (48). One of the fixed sliders (46) is fixedly connected to the outside of the T-shaped waterproof belt (61). A second drive motor (50) is fixedly connected to the outside of the end of the lifting protective shell (12). One of the pulleys (49) is fixedly connected to the output end of the second drive motor (50).

5. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 1, characterized in that, The internal circulation and external discharge components of the photosynthetic microorganisms include a low shear force reflux pump (38), which is fixedly connected to the bottom inner side of the sludge collection hopper (43). The output end of the low shear force reflux pump (38) is fixedly connected to a second three-way valve (39). One output end of the second three-way valve (39) is fixedly connected to a sludge discharge branch pipe (40), and the other output end of the second three-way valve (39) is fixedly connected to a microbial reflux pipe (41). The microbial reflux pipe (41) is fixedly connected to the bottom inner side of the photosynthetic reaction treatment box (2).

6. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 1, characterized in that, The waste gas collection and circulation assembly includes two gas collection hoppers (8), which are fixedly connected to the inner sides of both ends of the photosynthetic reaction treatment box (2). A dehumidifying shell (9) is fixedly connected to the top of each of the two gas collection hoppers (8). A baffle plate (15) is fixedly connected inside each of the two dehumidifying shells (9). A filter screen (30) is fixedly connected inside the top of each dehumidifying shell (9), and a spiral fan (31) is rotatably connected to each. A waste gas conveying pipe (10) is fixedly connected to the outside of the photosynthetic reaction treatment box (2). The two input ends of the waste gas conveying pipe (10) are fixedly connected to the inner tops of the two dehumidifying shells (9). A base plate (13) is fixedly connected to the outer side of one end of the photosynthetic reaction treatment box (2). An air pump (14) is fixedly connected to the outside. The output end of the air pump (14) is fixedly connected to a first three-way valve (32). The waste gas conveying pipe (10) is fixedly connected to the input end of the first three-way valve (32). One output end of the first three-way valve (32) is fixedly connected to a waste gas output pipe (33). The other output end of the first three-way valve (32) is fixedly connected to a gas conveying pipe (16). The end of the gas conveying pipe (16) away from the first three-way valve (32) is fixedly connected to an aeration disc (35). The bottom of the photosynthetic reaction treatment box (2) is fixedly connected to a protective bottom shell (34). The aeration disc (35) is fixedly connected to the inner side of the protective bottom shell (34). Multiple micro-hole nozzles (36) are provided on the inner side of the aeration disc (35).

7. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 1, characterized in that, A third drive motor (55) is fixedly connected to the outer side of the middle part of the photosynthetic reaction processing box (2). A second connecting rod (56) is rotatably connected to the inner side of the middle part of the photosynthetic reaction processing box (2). Multiple stirring blades (57) are fixedly connected to the outer side of the second connecting rod (56). One end of the second connecting rod (56) is fixedly connected to the output end of the third drive motor (55). A protective shell (11) is fixedly connected to the outer side of the photosynthetic reaction processing box (2). The third drive motor (55) is fixedly connected to the inner side of the protective shell (11).

8. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 1, characterized in that, A second connecting pipe (51) is fixedly connected to the inner side of one end of the photosynthetic reaction treatment box (2), and a primary filter box (1) is fixedly connected to the other end of the second connecting pipe (51). A water inlet pipe (5) is fixedly connected to the inner side of the primary filter box (1) away from the photosynthetic reaction treatment box (2). A fixed base plate (52) is fixedly connected to the inside of the primary filter box (1) near the water inlet pipe (5). Two impurity collection frames (53) are provided between the side of the fixed base plate (52) and the primary filter box (1). The two impurity collection frames (53) are slidably connected to the inner side of the primary filter box (1). A second fixed plate (54) is fixedly connected to the inner side of the bottom of the end near the photosynthetic reaction treatment box (2).

9. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 2, characterized in that, The inner sides of both ends of the connecting plate (21) are rotatably connected to rotating rings (59), and the inner sides of the two rotating rings (59) are fixedly connected to threaded soft rubber brushes (60). The two threaded soft rubber brushes (60) are respectively threaded to the outer sides of the two stainless steel threaded rods (18).

10. The circulating fishery wastewater purification equipment based on photosynthetic microorganisms according to claim 8, characterized in that, A first connecting pipe (37) is provided inside the photosynthetic reaction treatment box (2) and the biomass collection box (3). A water outlet pipe (6) is fixedly connected to the end of the biomass collection box (3) away from the photosynthetic reaction treatment box (2). Multiple bases (4) are fixedly connected to the bottom of the primary filter box (1), the photosynthetic reaction treatment box (2) and the biomass collection box (3).

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