An algae-bacteria collaborative aerobic denitrification polyphosphate wastewater treatment system and treatment process

Abstract

The present invention discloses an algae-bacteria collaborative aerobic denitrification polyphosphate wastewater treatment system and treatment process, belonging to the field of wastewater treatment technology. An algae-bacteria collaborative aerobic denitrification polyphosphate wastewater treatment system includes an aerobic tank provided with an aeration pipe, and also includes: a driving part, the driving part is arranged in the aerobic tank, and the two ends of the aerobic tank are respectively rotatably connected to a first rotating plate and a second rotating plate connected to the driving part; an algae strain tube, a plurality of algae strain tubes are provided and evenly distributed on the driving part in a circular shape, and yellow silk algae are placed in the algae strain tubes; and a material receiving assembly, the material receiving assembly is arranged in the algae strain tube, a material receiving shell is fixed on the outside of the aerobic tank, and a driving part for driving the material receiving assembly is provided on the aerobic tank; the present invention can fully expose the algae strains in the aerobic tank to light, ensure the purification efficiency and purification effect of the algae and bacteria on the wastewater, and can clean and collect the excess algae strains that reproduce during the purification process, further reducing the impact on the light exposure of the algae and bacteria.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to an algae-bacteria coordinated aerobic denitrification and phosphorus accumulation wastewater treatment system and a treatment process. Background Art

[0002] Traditional biochemical treatment processes have become the mainstream in wastewater treatment plants worldwide. They primarily include anaerobic, aerobic, and sedimentation processes. The anaerobic stage primarily involves COD degradation and denitrification, while the aerobic stage primarily involves COD degradation and nitrification. The effluent from the aerobic stage must be returned to the anaerobic stage for denitrification to remove nitrogen from the wastewater, which undoubtedly increases wastewater treatment costs. Furthermore, the bacterial activity during traditional wastewater biochemical treatment produces large amounts of greenhouse gases such as carbon dioxide and methane, hindering the achievement of China's national carbon peak and carbon neutrality goals.

[0003] Compared with traditional biochemical methods for wastewater treatment, microalgae-bacteria symbiotic systems offer significant advantages. Microalgae consume CO₂ through photosynthesis and release O₂, which is then used by bacteria for respiration and assimilation, degradation of organic carbon, nitrogen, and phosphorus. The CO₂, inorganic nitrogen, and phosphorus produced by bacterial aerobic metabolism serve as raw materials for microalgae photosynthesis. However, current microalgae-bacteria symbiotic wastewater treatment typically utilizes single-celled microalgae (cell diameter approximately 3 μm) such as Chlorella vulgaris. The difficulty and high cost of recovering these algae significantly limit the application of this wastewater treatment method. Furthermore, as wastewater treatment progresses, algae and bacteria gradually grow and occupy more space. If not promptly treated, they can easily cause secondary pollution. Furthermore, the increased size and accumulation of algae and bacteria can limit the light intensity within the treatment chamber, causing some to adhere to the inner walls of the treatment chamber, which can also affect their light exposure. The efficiency of algae-bacteria wastewater treatment depends on multiple factors, including solar radiation, temperature, pollution level, and residence time. Light intensity significantly impacts wastewater treatment efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose an algae-bacteria coordinated aerobic denitrification polyphosphate wastewater treatment system and treatment process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An algae-bacteria collaborative aerobic denitrification and phosphorus accumulation wastewater treatment system includes an aerobic tank provided with an aeration pipe, and further includes:

[0007] A driving part, wherein the driving part is arranged in the aerobic tank, and two ends of the aerobic tank are rotatably connected to a first rotating plate and a second rotating plate connected to the driving part;

[0008] Algae strain tubes, wherein a plurality of the algae strain tubes are provided and are evenly distributed on the driving part in a circular shape, and yellow silk algae are placed in the algae strain tubes; and

[0009] The material receiving assembly is arranged in the algae strain tube, a material receiving shell is fixedly provided on the outside of the aerobic tank, and a driving member for driving the material receiving assembly is provided on the aerobic tank.

[0010] Preferably, the driving part includes a driving motor fixed on the outside of the aerobic tank, a driving rod connected to the output end of the driving motor and rotatably arranged in the aerobic tank, and connecting plates evenly distributed on the driving rod in a circumferential manner, and the end of the connecting plate away from the driving rod is connected to the algae strain tube.

[0011] Preferably, a transmission cavity is formed between the first rotating plate and the inner wall of the aerobic tank, a gear ring is fixed in the transmission cavity, a driven gear meshing with the gear ring is fixed on the outside of the algae strain tube, and the algae strain tube and the connecting plate are rotatably arranged.

[0012] Preferably, the material collecting assembly includes a movable ring slidably connected to the algae tube, a first semicircular plate fixed in the movable ring, a second semicircular plate rotatably connected to the first semicircular plate, and a rotating rod fixed to the second semicircular plate, and the end of the rotating rod away from the second semicircular plate passes through the algae tube and the aerobic tank and extends outward.

[0013] Preferably, the algae strain tube includes a main body and a baffle that is movably opposed to the end of the main body. A concave hole is provided on the main body. A connecting rod connected to the baffle is slidably connected in the concave hole. An elastic element is provided between the connecting rod and the inner wall of the concave hole. A top rod that is movably opposed to the baffle is fixed on the movable ring.

[0014] Preferably, the main body, the first semicircular plate and the second semicircular plate are all provided with through holes for wastewater to pass through, the arc surface of the second semicircular plate is set as a cutting surface, the inner wall of the main body is provided with a slide groove, and a slider connected to the movable ring is slidably connected in the slide groove.

[0015] Preferably, the driving member includes a first ear plate fixed on the aerobic tank, a hydraulic cylinder connected to the output end of the first ear plate, a second ear plate connected to the end of the hydraulic cylinder piston rod away from the first ear plate, and a movable plate connected to the second ear plate, and the movable plate is rotatably connected to the end of the rotating rod away from the second semicircular plate.

[0016] Preferably, a support rod is fixedly provided on the outside of the aerobic tank, a positioning rod is fixedly provided on one end of the support rod away from the aerobic tank, a track groove is provided on the rotating rod to cooperate with the positioning rod, and the track groove includes an inclined groove for rotating the rotating rod and a straight groove connected to the inclined groove.

[0017] Preferably, an anaerobic tank and a sedimentation tank are also included, both of which are provided with a mud discharge port. The outside of the anaerobic tank is connected to a water inlet. The top of the anaerobic tank is provided with a water inlet pipe connected to the aerobic tank. The bottom of the aerobic tank is provided with a water outlet pipe connected to the sedimentation tank. The sedimentation tank is also provided with a water outlet. A return pipe is provided between the bottom of the material receiving shell and the water inlet pipe, and a check valve is provided in the return pipe.

[0018] The present invention also discloses a process for treating wastewater with algae-bacteria synergistic aerobic denitrification and phosphorus accumulation, comprising the above-mentioned algae-bacteria synergistic aerobic denitrification and phosphorus accumulation wastewater treatment system, and further comprising the following steps:

[0019] S1: Wastewater enters the anaerobic tank through the water inlet for anaerobic digestion, while achieving water quality stabilization, partial denitrification and sedimentation. After sedimentation, the supernatant of the anaerobic wastewater enters the aerobic tank through the pump body connected to the water inlet pipe, and the sludge at the bottom is discharged through the sludge discharge port;

[0020] S2: The wastewater from the anaerobic stage enters the aerobic tank. Yellow filament algae are added in a certain proportion to each algae strain tube. Then, aerobic denitrifying phosphate-accumulating bacteria and activated sludge are added in proportion to the aerobic tank. Air is introduced into the bottom through the aeration pipe for aeration. The aeration volume is adjusted according to the growth of microorganisms in the aerobic tank. Through the yellow filament algae and aerobic denitrifying phosphate-accumulating bacteria, COD degradation, ammonia nitrogen absorption, nitrification, denitrification, and phosphorus accumulation process occur, thereby simultaneously removing COD, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and phosphate pollutants in the wastewater;

[0021] S3: By controlling the operation of the driving motor, the output end of the driving motor drives the driving rod to rotate. When the driving rod rotates, the algae tube is driven to revolve around the driving rod as the center through the connecting plate, so that the yellow algae in each algae tube can receive sufficient light, avoiding different light exposure due to the algae tubes being in different positions in the aerobic tank. When the algae tube rotates with the driving rod, the outer driven gear engages with the gear ring in the transmission cavity for transmission, so that the driven gear drives the algae tube to rotate relative to the connecting plate, so that the yellow algae in a single algae tube can receive uniform light. During the rotation of the algae tube, the yellow algae utilizes CO2, NH4+, and PO43 nutrients in the water through photosynthesis to synthesize its own cell substances and release O2. Aerobic denitrifying polyphosphate bacteria utilize O2 in the water to decompose and transform organic pollutants, producing CO2 and the above nutrients to maintain the growth and reproduction of algae. This cycle is repeated to achieve the biological purification of sewage.

[0022] S4: As the algae purify the wastewater, the algae grow and reproduce rapidly in the algae tube and fill the algae tube. By controlling the operation of the hydraulic cylinder, the piston rod of the hydraulic cylinder pushes the movable plate to move through the second ear plate. When the movable plate moves, the rotating rod is displaced. During the movement of the rotating rod, the track groove cooperates with the positioning rod, so that the rotating rod rotates with the initial movement of the movable plate. The inclined groove of the rotating rod cooperates with the positioning rod and drives the second semicircular plate to rotate. During the rotation of the second semicircular plate, the yellow silk algae at the movable ring are cut. As the second semicircular plate rotates, the second semicircular plate and the first semicircular plate are connected. The semicircular plates cooperate to separate the main body, and then the positioning rod is placed in the straight groove. As the movable plate moves, the rotating rod drives the first semicircular plate and the movable ring to slide in the algae tube through the second semicircular plate, so that the first semicircular plate and the second semicircular plate push the yellow algae removed from the algae tube. When the movable ring moves to one end of the algae tube, the top rod on the movable ring exerts force on the baffle to separate the baffle from the main body. At this time, the yellow algae pushed by the first semicircular plate and the second semicircular plate falls from the main body and falls into the material receiving shell. Part of the wastewater falling with the yellow algae enters the outlet pipe along the reflux pipe;

[0023] S5: The wastewater purified by the aerobic tank enters the sedimentation tank under the action of the pump body connected to the outside of the outlet pipe. The particles in the wastewater settle to the bottom under the action of gravity and are finally discharged through the mud outlet at the bottom of the tank. The treated wastewater is discharged through the outlet.

[0024] Compared with the existing technology, the present invention provides an algae-bacteria collaborative aerobic denitrification phosphorus accumulation wastewater treatment system and treatment process, which has the following beneficial effects:

[0025] 1. The algae-bacteria collaborative aerobic denitrification polyphosphate wastewater treatment system and treatment process drives the algae strain tube to rotate in a circle through the driving part, so that the algae strains in the aerobic tank can be fully exposed to light, ensuring the purification efficiency and purification effect of the algae and bacteria on the wastewater. The excess algae strains that grow during the purification process can be cleaned and collected through the collecting component, further reducing the impact of light on the algae and bacteria.

[0026] 2. The algae-bacteria collaborative aerobic denitrification and polyphosphate wastewater treatment system and treatment process controls the operation of the drive motor so that the output end of the drive motor drives the drive rod to rotate. When the drive rod rotates, the algae tube is driven to revolve around the drive rod as the center through the connecting plate, so that the yellow algae in each algae tube can receive sufficient light, avoiding different light exposure due to the algae tubes being in different positions in the aerobic tank. When the algae tube rotates with the drive rod, the driven gear on the outside engages with the gear ring in the transmission cavity for transmission, so that the driven gear drives the algae tube to rotate relative to the connecting plate, so that the yellow algae in a single algae tube can receive uniform light, thereby improving the sewage purification efficiency.

[0027] 3. The algae-bacteria collaborative aerobic denitrification polyphosphate wastewater treatment system and treatment process uses yellow filament algae to purify wastewater, overcoming the problem of microalgae being difficult to harvest due to their tiny cells in existing algae-bacteria collaborative treatment processes. The algae cells can be separated from the water body only through simple filtration, reducing the energy consumption and cost of microalgae separation. The produced yellow filament algae has extremely high economic benefits, realizing the transformation of the wastewater treatment process from simple capital investment and consumption to generating economic benefits, and has high economic efficiency.

[0028] 4. The algae-bacteria collaborative aerobic denitrification polyphosphate wastewater treatment system and treatment process adopts aerobic denitrification polyphosphate bacteria to achieve the simultaneous denitrification (ammonia nitrogen, nitrate nitrogen and total nitrogen) and phosphorus removal processes in the aerobic stage of wastewater treatment. The wastewater treatment process does not need to be returned to the anaerobic tank for denitrification to remove nitrogen in the wastewater, thereby reducing the cost of wastewater treatment. In addition, through the collaboration of algae and bacteria, the cross-feeding of substances such as carbon dioxide between algae strains and bacteria is utilized to reduce the amount of aeration, reduce the emission of gases such as carbon dioxide and methane during the aerobic treatment of wastewater, further reduce the cost of wastewater treatment, and achieve carbon emission reduction and carbon neutrality in the wastewater treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the aerobic tank of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the driving part of the present invention;

[0032] Figure 4 Schematic diagram of the cross-sectional structure of the aerobic tank of the present invention;

[0033] Figure 5 Schematic diagram of the cross-sectional structure of the algae strain tube of the present invention;

[0034] Figure 6 This is a schematic structural diagram of the main body and the baffle being separated according to the present invention;

[0035] Figure 7 For the present invention Figure 6 A partial enlarged structural diagram of the middle part;

[0036] Figure 8 Schematic diagram of the external structure of the rotating rod of the present invention.

[0037] Figure: 1, aerobic tank; 101, aeration tube; 2, drive unit; 201, drive motor; 202, drive rod; 203, connecting plate; 3, first rotating plate; 4, second rotating plate; 5, algae strain tube; 501, main body; 5011, chute; 5012, slider; 502, baffle; 503, through hole; 6, material receiving shell; 7, gear ring; 701, driven gear; 8, moving ring; 801, first semicircular plate; 802, second semicircular plate; 803, rotating rod ; 9. Concave hole; 901. Connecting rod; 902. Elastic element; 10. Push rod; 11. Hydraulic cylinder; 111. First ear plate; 112. Second ear plate; 113. Moving plate; 12. Support rod; 121. Positioning rod; 13. Track groove; 131. Inclined groove; 132. Straight groove; 14. Anaerobic tank; 141. Water inlet; 142. Mud discharge port; 143. Water inlet pipe; 15. Sedimentation tank; 151. Water outlet pipe; 152. Water outlet; 16. Return pipe. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Example: Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A system for treating wastewater by algae-bacteria coordinated aerobic denitrification and phosphorus accumulation comprises an aerobic tank 1 provided with an aeration pipe 101, and further comprising:

[0042] The driving part 2 is arranged in the aerobic tank 1. The two ends of the aerobic tank 1 are rotatably connected to a first rotating plate 3 and a second rotating plate 4 connected to the driving part 2;

[0043] Algae tubes 5, a plurality of which are evenly distributed on the driving part 2 in a circular pattern, and yellow silk algae are placed in the algae tubes 5; and

[0044] The material receiving assembly is arranged in the algae strain tube 5 , a material receiving shell 6 is fixedly provided on the outside of the aerobic tank 1 , and a driving member for driving the material receiving assembly is provided on the aerobic tank 1 .

[0045] Specifically, wastewater enters the aerobic tank 1, and yellow silk algae is added to each algae strain tube 5 in a certain proportion, and then aerobic denitrifying phosphate-accumulating bacteria and activated sludge are added to the aerobic tank 1 in proportion. Air is introduced into the bottom through the aeration pipe 101 for aeration. The aeration amount is adjusted according to the growth of microorganisms in the aerobic tank 1. The aerobic tank 1 and the algae strain tube 5 can be made of transparent materials to reduce the impact of light and facilitate the observation of the growth of the algae strains. Through the yellow silk algae and aerobic denitrifying phosphate-accumulating bacteria, COD degradation, ammonia nitrogen absorption, nitrification, denitrification, and phosphorus accumulation processes occur, thereby removing COD, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and phosphate pollutants in the wastewater at the same time. The algae strain tube 5 is driven to rotate in a circle by the driving part 2, so that the algae strains in the aerobic tank 1 can be fully exposed to light, thereby ensuring the purification efficiency and purification effect of algae and bacteria on wastewater, and the excess algae strains propagated during the purification process can be cleaned and collected by the collecting component, further reducing the impact of light on the algae and bacteria;

[0046] By using yellow filament algae to purify wastewater, the problem of microalgae being difficult to harvest due to their tiny cells in existing algae-bacteria co-treatment processes is overcome. Algae cells can be separated from water bodies through simple filtration, reducing the energy consumption and cost of microalgae separation. The produced yellow filament algae has extremely high economic benefits, realizing the transformation of the wastewater treatment process from a simple capital investment to generating economic benefits, with high economic efficiency.

[0047] By adopting aerobic denitrifying polyphosphate bacteria, the denitrification (ammonia nitrogen, nitrate nitrogen and total nitrogen) and phosphorus removal processes in the aerobic stage of wastewater treatment are carried out simultaneously. The wastewater treatment process does not need to be returned to the anaerobic tank 14 for denitrification to remove nitrogen in the wastewater, thereby reducing the cost of wastewater treatment. In addition, through the synergy of algae and bacteria, the cross-feeding of substances such as carbon dioxide between algae strains and bacteria is utilized to reduce the aeration volume, reduce the emission of gases such as carbon dioxide and methane during the aerobic treatment of wastewater, further reduce the cost of wastewater treatment, and achieve carbon emission reduction and carbon neutrality in the wastewater treatment process.

[0048] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As a preferred technical solution of the present invention, the driving part 2 includes a driving motor 201 fixedly mounted on the outside of the aerobic tank 1, a driving rod 202 connected to the output end of the driving motor 201 and rotatably arranged in the aerobic tank 1, and connecting plates 203 uniformly distributed on the driving rod 202. The end of the connecting plate 203 away from the driving rod 202 is connected to the algae tube 5. Specifically, by controlling the operation of the driving motor 201, the output end of the driving motor 201 drives the driving rod 202 to rotate. When the driving rod 202 rotates, the algae tube 5 is driven to revolve around the driving rod 202 as the center through the connecting plate 203, so that the yellow silk algae in each algae tube 5 can be exposed to sufficient light, avoiding different light exposure due to the algae tube 5 being at different positions in the aerobic tank 1, and placing the yellow silk algae in the algae tube 5 effectively avoids the space occupied by the algae tube 5 gradually increasing as the algae grows, thereby avoiding the algae tube 5 blocking the light of other algae.

[0049] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As a preferred technical solution of the present invention, a transmission cavity is formed between the first rotating plate 3 and the inner wall of the aerobic tank 1, and a gear ring 7 is fixedly provided in the transmission cavity. A driven gear 701 meshing with the gear ring 7 is fixedly provided on the outer side of the algae strain tube 5, and the algae strain tube 5 and the connecting plate 203 are rotatably arranged; specifically, when the algae strain tube 5 rotates with the driving rod 202, the driven gear 701 on the outer side meshes with the gear ring 7 in the transmission cavity for transmission, so that the driven gear 701 drives the algae strain tube 5 to rotate relative to the connecting plate 203, so that the yellow algae in a single algae strain tube 5 can be evenly illuminated, thereby ensuring the wastewater treatment efficiency.

[0050] Reference Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As a preferred technical solution of the present invention, the material collecting assembly includes a movable ring 8 slidably connected to the algae tube 5, a first semicircular plate 801 fixed in the movable ring 8, a second semicircular plate 802 rotatably connected to the first semicircular plate 801, and a rotating rod 803 fixed to the second semicircular plate 802, and the end of the rotating rod 803 away from the second semicircular plate 802 passes through the algae tube 5 and the aerobic tank 1 and extends outward.

[0051] Furthermore, the algae strain tube 5 includes a main body 501 and a baffle 502 that is movably opposed to the end of the main body 501. A recessed hole 9 is provided on the main body 501. A connecting rod 901 connected to the baffle 502 is slidably connected in the recessed hole 9. An elastic element 902 is provided between the connecting rod 901 and the inner wall of the recessed hole 9. A top rod 10 that is movably opposed to the baffle 502 is fixed on the movable ring 8.

[0052] Furthermore, the main body 501, the first semicircular plate 801 and the second semicircular plate 802 are all provided with a through hole 503 for wastewater to pass through, the arc surface of the second semicircular plate 802 is set as a cutting surface, and the inner wall of the main body 501 is provided with a slide groove 5011, and a slider 5012 connected to the movable ring 8 is slidably connected in the slide groove 5011.

[0053] Specifically, when the collecting component is working, the rotating rod 803 is first controlled to rotate, so that the rotating rod 803 drives the second semicircular plate 802 to rotate. During the rotation of the second semicircular plate 802, the yellow algae at the moving ring 8 are cut. As the second semicircular plate 802 rotates, the second semicircular plate 802 cooperates with the first semicircular plate 801 to separate the main body 501, and then the rotating rod 803 is pulled and moved to the outside of the algae tube 5. The rotating rod 803 drives the first semicircular plate 801 and the moving ring 8 to slide in the algae tube 5 through the second semicircular plate 802, so that the first semicircular plate 801 and the second semicircular plate 802 cut the algae. The yellow filament algae removed from the strain tube 5 are pushed. When the movable ring 8 moves to one end of the algae strain tube 5, the top rod 10 on the movable ring 8 exerts force on the baffle 502 to separate the baffle 502 from the main body 501. At this time, the yellow filament algae pushed by the first semicircular plate 801 and the second semicircular plate 802 fall from the main body 501 and fall into the collecting shell 6, cleaning and collecting the excess algae propagated during the purification process, further reducing the impact on algae and fungi light, and the produced yellow filament algae have extremely high economic benefits, realizing the transformation of the wastewater treatment process from simple capital investment and consumption to generating economic benefits, with high economic efficiency.

[0054] Reference Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 8 As a preferred technical solution of the present invention, the driving member includes a first ear plate 111 fixed on the aerobic tank 1, a hydraulic cylinder 11 connected to the output end of the first ear plate 111, a second ear plate 112 connected to the end of the piston rod of the hydraulic cylinder 11 away from the first ear plate 111, and a movable plate 113 connected to the second ear plate 112. The movable plate 113 is rotatably connected to the end of the rotating rod 803 away from the second semicircular plate 802.

[0055] Furthermore, a support rod 12 is fixedly provided on the outside of the aerobic tank 1, and a positioning rod 121 is fixedly provided on the end of the support rod 12 away from the aerobic tank 1. A track groove 13 that cooperates with the positioning rod 121 is opened on the rotating rod 803, and the track groove 13 includes an inclined groove 131 for rotating the rotating rod 803 and a straight groove 132 connected to the inclined groove 131.

[0056] Specifically, as the algae purify the wastewater, the algae grow and reproduce rapidly in the algae tube 5 and fill the algae tube 5. By controlling the operation of the hydraulic cylinder 11, the piston rod of the hydraulic cylinder 11 pushes the movable plate 113 to move through the second ear plate 112. When the movable plate 113 moves, the rotating rod 803 is driven to move. During the movement of the rotating rod 803, the track groove 13 cooperates with the positioning rod 121, so that the rotating rod 803 rotates when the movable plate 113 moves initially. The inclined groove 131 of the rotating rod 803 cooperates with the positioning rod 121 and drives the second semicircle 113 to rotate. The plate 802 rotates, and the second semicircular plate 802 cuts the yellow algae at the movable ring 8 during the rotation process. As the second semicircular plate 802 rotates, the second semicircular plate 802 cooperates with the first semicircular plate 801 to separate the main body 501, and then the positioning rod 121 is placed in the straight groove 132. As the movable plate 113 moves, the rotating rod 803 drives the first semicircular plate 801 and the movable ring 8 to slide in the algae tube 5 through the second semicircular plate 802, so that the first semicircular plate 801 and the second semicircular plate 802 push the cut yellow algae in the algae tube 5.

[0057] Reference Figure 1 and Figure 4 As a preferred technical solution of the present invention, it also includes an anaerobic tank 14 and a sedimentation tank 15, both of which are provided with a mud discharge port 142. The outside of the anaerobic tank 14 is connected to a water inlet 141. The top of the anaerobic tank 14 is provided with a water inlet pipe 143 connected to the aerobic tank 1. The bottom of the aerobic tank 1 is provided with a water outlet pipe 151 connected to the sedimentation tank 15. The sedimentation tank 15 is also provided with a water outlet 152. A return pipe 16 is provided between the bottom of the receiving shell 6 and the water inlet pipe 143. A check valve is provided in the return pipe 16. Specifically, the wastewater is discharged through the inlet. The water inlet 141 enters the anaerobic tank 14 for anaerobic digestion, while achieving water quality stabilization, partial denitrification and sedimentation. After sedimentation, the supernatant of the anaerobic wastewater enters the aerobic tank 1 through the pump body connected to the water inlet pipe 143, and the bottom sludge is discharged through the mud outlet 142. After purification in the aerobic tank 1, the wastewater enters the sedimentation tank 15 under the action of the pump body connected to the outside of the outlet pipe 151. The particulate matter in the wastewater settles to the bottom under the action of gravity and is finally discharged through the mud outlet 142 at the bottom of the tank. The treated wastewater is discharged through the outlet 152.

[0058] The present invention also discloses an algae-bacteria collaborative aerobic denitrification and phosphorus accumulation wastewater treatment process, comprising an algae-bacteria collaborative aerobic denitrification and phosphorus accumulation wastewater treatment system, and further comprising the following steps:

[0059] S1: Wastewater enters the anaerobic tank 14 through the water inlet 141 for anaerobic digestion, while achieving water quality stabilization, partial denitrification and sedimentation. After sedimentation, the supernatant of the anaerobic wastewater enters the aerobic tank 1 through the pump body connected to the water inlet pipe 143, and the bottom sludge is discharged through the sludge outlet 142;

[0060] S2: The wastewater from the anaerobic stage enters the aerobic tank 1. Yellow filament algae are added in a certain proportion to each algae strain tube 5. Then, aerobic denitrifying phosphate-accumulating bacteria and activated sludge are added in proportion to the aerobic tank 1. Air is introduced into the bottom through the aeration pipe 101 for aeration. The aeration volume is adjusted according to the growth of microorganisms in the aerobic tank 1. Through the yellow filament algae and aerobic denitrifying phosphate-accumulating bacteria, COD degradation, ammonia nitrogen absorption, nitrification, denitrification, and phosphorus accumulation processes occur, thereby simultaneously removing COD, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, and phosphate pollutants in the wastewater;

[0061] S3: By controlling the operation of the driving motor 201, the output end of the driving motor 201 drives the driving rod 202 to rotate. When the driving rod 202 rotates, the connecting plate 203 drives the algae tube 5 to revolve around the driving rod 202, so that the yellow algae in each algae tube 5 can be exposed to sufficient light, avoiding the algae tubes 5 being exposed to different light due to being in different positions in the aerobic tank 1. When the algae tubes 5 rotate with the driving rod 202, the driven gear 701 on the outside engages with the gear ring 7 in the transmission cavity to transmit the driven gear. 701 drives the algae tube 5 to rotate relative to the connecting plate 203, so that the yellow algae in each algae tube 5 can be evenly illuminated. As the algae tube 5 rotates, the yellow algae utilizes CO2, NH4+, and PO43 nutrients in the water through photosynthesis to synthesize its own cellular substances and release O2. Aerobic denitrifying phosphate-accumulating bacteria use O2 in the water to decompose and transform organic pollutants, producing CO2 and the above nutrients to maintain the growth and reproduction of algae. This cycle repeats, achieving the biological purification of sewage.

[0062] S4: As the algae purify the wastewater, the algae grow and reproduce rapidly in the algae tube 5 and fill the algae tube 5. By controlling the operation of the hydraulic cylinder 11, the piston rod of the hydraulic cylinder 11 pushes the movable plate 113 to move through the second ear plate 112. When the movable plate 113 moves, the rotating rod 803 is displaced. During the movement of the rotating rod 803, the track groove 13 cooperates with the positioning rod 121, so that the rotating rod 803 rotates when the movable plate 113 moves initially. The inclined groove 131 of the rotating rod 803 cooperates with the positioning rod 121 and drives the second semicircular plate 802 to rotate. During the rotation of the second semicircular plate 802, the yellow silk algae at the movable ring 8 are cut. As the second semicircular plate 802 rotates, the second semicircular plate 802 and the first semicircular plate 803 are aligned. 01 cooperates to separate the main body 501, and then the positioning rod 121 is placed in the straight groove 132. As the movable plate 113 moves, the rotating rod 803 drives the first semicircular plate 801 and the movable ring 8 to slide in the algae tube 5 through the second semicircular plate 802, so that the first semicircular plate 801 and the second semicircular plate 802 push the yellow silk algae cut out in the algae tube 5. When the movable ring 8 moves to one end of the algae tube 5, the top rod 10 on the movable ring 8 exerts force on the baffle 502 to separate the baffle 502 from the main body 501. At this time, the yellow silk algae pushed by the first semicircular plate 801 and the second semicircular plate 802 falls from the main body 501 and falls into the material receiving shell 6. Part of the wastewater falling with the yellow silk algae enters the outlet pipe 151 along the reflux pipe 16;

[0063] S5: The wastewater purified by the aerobic tank 1 enters the sedimentation tank 15 under the action of the pump body connected to the outside of the outlet pipe 151. The particles in the wastewater settle to the bottom under the action of gravity and are finally discharged through the mud discharge port 142 at the bottom of the tank. The treated wastewater is discharged through the outlet 152.

[0064] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An algae-bacteria collaborative aerobic denitrification and phosphorus accumulation wastewater treatment system, comprising an aerobic tank (1) provided with an aeration pipe (101), characterized in that: Also includes: A driving part (2), the driving part (2) being arranged in the aerobic tank (1), and the two ends of the aerobic tank (1) are rotatably connected to a first rotating plate (3) and a second rotating plate (4) connected to the driving part (2); Algae strain tubes (5), wherein a plurality of the algae strain tubes (5) are provided and are evenly distributed on the driving part (2) in a circular pattern, and yellow silk algae are placed in the algae strain tubes (5); and A material receiving assembly, the material receiving assembly being arranged in the algae strain tube (5), a material receiving shell (6) being fixedly provided on the outside of the aerobic tank (1), and a driving member for driving the material receiving assembly to work being provided on the aerobic tank (1); The material collecting assembly comprises a moving ring (8) slidably connected to the algae tube (5), a first semicircular plate (801) fixed in the moving ring (8), a second semicircular plate (802) rotatably connected to the first semicircular plate (801), and a rotating rod (803) fixed to the second semicircular plate (802), wherein an end of the rotating rod (803) away from the second semicircular plate (802) passes through the algae tube (5) and the aerobic tank (1) and extends outward; The algae strain tube (5) comprises a main body (501) and a baffle (502) movably abutting against the end of the main body (501); a concave hole (9) is provided on the main body (501); a connecting rod (901) connected to the baffle (502) is slidably connected in the concave hole (9); an elastic element (902) is provided between the connecting rod (901) and the inner wall of the concave hole (9); and a top rod (10) movably abutting against the baffle (502) is fixed on the movable ring (8); The main pipe body (501), the first semicircular plate (801) and the second semicircular plate (802) are all provided with through holes (503) for wastewater to pass through, the arc surface of the second semicircular plate (802) is set as a cutting surface, the inner wall of the main pipe body (501) is provided with a sliding groove (5011), and a slider (5012) connected to the moving ring (8) is slidably connected in the sliding groove (5011); The driving member comprises a first ear plate (111) fixed on the aerobic tank (1), a hydraulic cylinder (11) connected to the output end of the first ear plate (111), a second ear plate (112) connected to the end of the piston rod of the hydraulic cylinder (11) away from the first ear plate (111), and a movable plate (113) connected to the second ear plate (112), wherein the movable plate (113) is rotatably connected to the end of the rotating rod (803) away from the second semicircular plate (802).

2. The algae-bacteria collaborative aerobic denitrification and phosphorus accumulation wastewater treatment system according to claim 1, characterized in that: The driving part (2) comprises a driving motor (201) fixedly arranged outside the aerobic tank (1), a driving rod (202) connected to the output end of the driving motor (201) and rotatably arranged inside the aerobic tank (1), and connecting plates (203) uniformly distributed on the driving rod (202) in a circumferential manner, wherein one end of the connecting plate (203) away from the driving rod (202) is connected to the algae strain tube (5).

3. The algae-bacteria collaborative aerobic denitrification and phosphorus accumulation wastewater treatment system according to claim 2, characterized in that: A transmission cavity is formed between the first rotating plate (3) and the inner wall of the aerobic tank (1), a gear ring (7) is fixedly provided in the transmission cavity, a driven gear (701) meshing with the gear ring (7) is fixedly provided on the outer side of the algae strain tube (5), and the algae strain tube (5) and the connecting plate (203) are rotatably arranged.

4. The algae-bacteria collaborative aerobic denitrification and phosphorus accumulation wastewater treatment system according to claim 3, characterized in that: A support rod (12) is fixedly provided on the outside of the aerobic tank (1), and a positioning rod (121) is fixedly provided on one end of the support rod (12) away from the aerobic tank (1). A track groove (13) is provided on the rotating rod (803) and matches the positioning rod (121). The track groove (13) includes an inclined groove (131) for rotating the rotating rod (803) and a straight groove (132) connected to the inclined groove (131).

5. The algae-bacteria collaborative aerobic denitrification and phosphorus accumulation wastewater treatment system according to claim 4, characterized in that: The invention also includes an anaerobic tank (14) and a sedimentation tank (15), both of which are provided with a mud discharge port (142). The outer side of the anaerobic tank (14) is connected to a water inlet (141). The top of the anaerobic tank (14) is provided with a water inlet pipe (143) connected to the aerobic tank (1). The bottom of the aerobic tank (1) is provided with a water outlet pipe (151) connected to the sedimentation tank (15). The sedimentation tank (15) is also provided with a water outlet (152). A return pipe (16) is provided between the bottom of the material receiving shell (6) and the water inlet pipe (143). A check valve is provided in the return pipe (16).

6. A process for treating wastewater with algae-bacteria synergistic aerobic denitrification and phosphorus accumulation, comprising the algae-bacteria synergistic aerobic denitrification and phosphorus accumulation wastewater treatment system according to claim 5, characterized in that: The following steps are also included: S1: wastewater enters the anaerobic tank (14) through the water inlet (141) for anaerobic digestion, while achieving water quality stabilization, partial denitrification and sedimentation. After sedimentation, the supernatant of the anaerobic wastewater enters the aerobic tank (1) through the pump body connected to the water inlet pipe (143), and the bottom sludge is discharged through the sludge outlet (142); S2: The wastewater from the anaerobic stage enters the aerobic tank (1), and yellow silk algae are added in a certain proportion in each algae strain tube (5). Then, aerobic denitrifying phosphate-accumulating bacteria and activated sludge are added in proportion in the aerobic tank (1). Air is introduced into the bottom through the aeration pipe (101) for aeration. The aeration volume is adjusted according to the growth of microorganisms in the aerobic tank (1). Through the yellow silk algae and aerobic denitrifying phosphate-accumulating bacteria, the process of COD degradation, ammonia nitrogen absorption, nitrification, denitrification, and phosphorus accumulation occurs, thereby removing COD, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and phosphate pollutants in the wastewater at the same time; S3: By controlling the operation of the driving motor (201), the output end of the driving motor (201) drives the driving rod (202) to rotate. When the driving rod (202) rotates, the connecting plate (203) drives the algae tube (5) to revolve around the driving rod (202), so that the yellow algae in each algae tube (5) can be exposed to sufficient light, and different light exposure due to the algae tube (5) being located at different positions in the aerobic tank (1) is avoided. When the algae tube (5) rotates with the driving rod (202), the driven gear (701) on the outside engages with the gear ring (7) in the transmission cavity, so that the driven gear (701) drives the algae tube (5) to rotate relative to the connecting plate (203), so that the yellow algae in the individual algae tube (5) can be exposed to uniform light. During the rotation of the algae tube (5), the yellow algae utilizes CO2 and NH4 in the water through photosynthesis. + PO4 3- Nutrients, synthesize their own cell substances and release O2, aerobic denitrifying polyphosphate bacteria use O2 in water to decompose and transform organic pollutants, produce CO2 and the above nutrients to maintain the growth and reproduction of algae, and so on, to achieve the biological purification of sewage; S4: As the algae purify the wastewater, the algae grow and reproduce rapidly in the algae tube (5) and fill the algae tube (5). By controlling the operation of the hydraulic cylinder (11), the piston rod of the hydraulic cylinder (11) pushes the movable plate (113) through the second ear plate (112). When the movable plate (113) moves, the rotating rod (803) is driven to move. During the movement of the rotating rod (803), the track groove (13) cooperates with the positioning rod (121), so that the rotating rod (803) rotates with the initial movement of the movable plate (113). The inclined groove (131) of the rotating rod (803) cooperates with the positioning rod (121) and drives the second semicircular plate (802) to rotate. During the rotation of the second semicircular plate (802), the yellow silk algae at the movable ring (8) are cut. As the second semicircular plate (802) rotates, the second semicircular plate (802) is aligned with the first semicircular plate (801). Cooperating with the separating main body (501), the positioning rod (121) is then placed in the straight groove (132). As the moving plate (113) moves, the rotating rod (803) drives the first semicircular plate (801) and the moving ring (8) to slide in the algae tube (5) through the second semicircular plate (802), so that the first semicircular plate (801) and the second semicircular plate (802) push the yellow algae removed in the algae tube (5). When the moving ring (8 ) moves to one end of the algae tube (5), the top rod (10) on the moving ring (8) exerts force on the baffle (502), so that the baffle (502) is separated from the main body (501), and the yellow filament algae pushed by the first semicircular plate (801) and the second semicircular plate (802) fall from the main body (501) and fall into the material collection shell (6), and part of the wastewater falling with the yellow filament algae enters the outlet pipe (151) along the return pipe (16); S5: The wastewater purified by the aerobic tank (1) enters the sedimentation tank (15) under the action of the pump body connected to the outside of the outlet pipe (151). The particles in the wastewater settle to the bottom under the action of gravity and are finally discharged through the mud outlet (142) at the bottom of the tank. The treated wastewater is discharged through the outlet (152).

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