A tail water treatment system for aquaculture

Abstract

The utility model discloses a tail water treatment system for aquaculture, including sedimentation adjusting pool and fixed establishment, the right side of sedimentation adjusting pool is sequentially provided with biochemical denitrification reaction pool, aerobic nitrification tank and phosphorus removal sedimentation tank from left to right, and the inside upper side cooperation of sedimentation adjusting pool is installed with grating, the fixed establishment: it includes rest stand, locating post, locating hole, pivot, fixed bolster and drive assembly, the inner wall upper side of sedimentation adjusting pool is equipped with rest stand, and the upper surface of rest stand is equipped with the locating post of uniform distribution, and the upper surface four corners of the frame of grating all are equipped with locating hole, and the locating post all are inserted in the inside of adjacent locating hole, this tail water treatment system for aquaculture installs grating in sedimentation adjusting pool through fixed establishment, when grating is damaged, and the maintenance is simple and convenient to the dismounting, has reduced the time of tail water treatment system for aquaculture and shutdown because of replacing grating.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, specifically to a wastewater treatment system for aquaculture. Background Technology

[0002] Aquaculture is an industry that uses water to artificially cultivate and breed aquatic organisms such as fish, shrimp, and shellfish to obtain aquatic products. During the breeding process, feed and excrement from aquatic animals will gradually accumulate and dissolve in the water, causing the content of organic pollutants in the water to increase continuously and making it easy for microorganisms and bacteria to grow. Therefore, it is necessary to change the breeding water regularly during the aquaculture process. If the aquaculture wastewater is discharged directly, it will not only pollute the ecological environment, but also waste water resources. At this time, an aquaculture wastewater treatment system is needed to treat the aquaculture wastewater. In existing wastewater treatment systems, the wastewater is usually first fed into a sedimentation and equalization tank (where feces and feed settle to the bottom of the tank), and then transported by a lift pump through a pipeline to a biological denitrification reaction tank (to remove total nitrogen), an aerobic nitrification tank (to enhance nitrification and assist in the degradation of organic matter), and a phosphorus removal sedimentation tank (to remove total phosphorus and achieve solid-liquid separation) before being discharged after treatment. The following problems exist: In order to prevent large debris such as plastic bags and branches from clogging subsequent pipes or equipment, a screen is usually installed at the inlet of the sedimentation and equalization tank with multiple sets of bolts to intercept large debris. When the screen is damaged, it is troublesome to disassemble and install. Moreover, the bolts may be corroded by long-term scouring and soaking of liquid, making it even more difficult to disassemble and install the screen. Therefore, we propose a tailwater treatment system for aquaculture. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a wastewater treatment system for aquaculture. The system uses a fixing mechanism to install the bar screen in the sedimentation and equalization tank. When the bar screen is damaged, it is easy to disassemble and assemble and maintain. This reduces the downtime of the wastewater treatment system for aquaculture due to bar screen replacement and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a wastewater treatment system for aquaculture, comprising a sedimentation and equalization tank and a fixing mechanism; From left to right, the right side of the sedimentation and equalization tank is equipped with a biological denitrification reaction tank, an aerobic nitrification tank, and a phosphorus removal sedimentation tank. A bar screen is installed on the upper side of the interior of the sedimentation and equalization tank. The fixing mechanism includes a placement frame, positioning columns, positioning holes, rotating shafts, fixing frames, and a drive assembly. The placement frame is provided on the upper side of the inner wall of the sedimentation and equalization tank. The upper surface of the placement frame is provided with evenly distributed positioning columns. Positioning holes are opened at the four corners of the upper surface of the grid frame. The positioning columns are inserted into the interior of the adjacent positioning holes. The front and rear sides of the interior of the sedimentation and equalization tank are rotatably connected to the rotating shafts through the drive assembly. Fixing frames are fixedly fitted on the outer surface of the rotating shafts. The lower surfaces of the two fixing frames are in contact with the upper surface of the same grid frame. The grid is installed in the sedimentation and equalization tank through the fixing mechanism. When the grid is damaged, disassembly and assembly are simple and maintenance is convenient, reducing the downtime of the aquaculture tailwater treatment system due to grid replacement.

[0005] Furthermore, the drive assembly includes a worm gear, a rotating rod, and a worm. The left end of the rotating shaft is provided with a worm gear passing through the left wall of the sedimentation and conditioning tank. The rotating rod is rotatably connected inside the protective cover on the left side of the sedimentation and conditioning tank. Worms are symmetrically arranged on the left and right sides of the outer surface of the rotating rod. The worm gears are all meshed with the worms on the same side to facilitate driving the rotating shaft to rotate.

[0006] Furthermore, the drive assembly also includes a motor. The motor is located on the front side of the protective cover. The rear end of the motor's output shaft is fixedly connected to the front end of the rotating rod. The input end of the motor is electrically connected to the output end of an external controller to facilitate driving the rotating rod to rotate.

[0007] Furthermore, the sedimentation and conditioning tank and the biological denitrification reaction tank, the biological denitrification reaction tank and the aerobic nitrification tank, and the aerobic nitrification tank and the phosphorus removal sedimentation tank are connected by conveying pipelines. Each of the conveying pipelines is connected in series with a booster pump. The input end of the booster pump is electrically connected to the output end of an external controller to facilitate the completion of the effluent treatment process.

[0008] Furthermore, the sedimentation and equalization tank is equipped with a sludge hopper at its lower end, and the phosphorus removal sedimentation tank is also equipped with a sludge hopper at its lower end, which facilitates subsequent sludge treatment.

[0009] Furthermore, the biochemical denitrification reaction tank is equipped with a support frame, and the support frame is equipped with uniformly distributed biological composite packing material. The aerobic nitrification tank is equipped with a bioreactor, which facilitates the treatment of effluent.

[0010] Furthermore, the front sides of the biochemical denitrification reaction tank, aerobic nitrification tank, and phosphorus removal sedimentation tank are respectively equipped with carbon addition pipes, oxygen addition pipes, and feed pipes to facilitate the addition of raw materials required during the treatment process.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This aquaculture wastewater treatment system has the following advantages: When the screen is damaged, the rotation of the rotating rod drives the worm gear to rotate. Since the worm gears on both sides are symmetrical, the rotation of the rotating rod drives the rotating shafts on both sides to rotate in opposite directions through the worm wheel. The rotation of the rotating shafts drives the fixing frame to rotate, releasing the downward pressure fixing on the screen frame. The screen can then be removed from the sedimentation and equalization tank. The new screen is placed on the placement rack. At this time, the positioning pin is inserted into the positioning hole, and the output shaft of the motor reverses, causing the fixing frame to reverse around the rotating shaft. This presses the screen down and fixes it on the placement rack in the sedimentation and equalization tank, completing the screen replacement. The screen is easy to disassemble and assemble, facilitating maintenance and reducing the downtime of the aquaculture wastewater treatment system due to screen replacement. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the structure of this utility model; Figure 3 This is a schematic diagram of the explosion structure of the sedimentation and conditioning tank of this utility model.

[0013] In the diagram: 1. Sedimentation and equalization tank; 2. Biochemical denitrification reaction tank; 3. Aerobic nitrification tank; 4. Phosphorus removal sedimentation tank; 5. Fixing mechanism; 51. Placement frame; 52. Positioning column; 53. Positioning hole; 54. Rotating shaft; 55. Fixing frame; 56. Drive assembly; 561. Worm gear; 562. Rotating rod; 563. Worm; 564. Motor; 6. Bar screen; 7. Conveying pipeline; 8. Lifting pump; 9. Sludge hopper; 10. Support frame; 11. Biological composite packing material; 12. Bioreactor; 13. Carbon addition pipe; 14. Oxygen addition pipe; 15. Feeding pipe. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3This embodiment provides a technical solution: an aquaculture wastewater treatment system, including a sedimentation and equalization tank 1 and a fixing mechanism 5. From left to right, a biochemical denitrification reaction tank 2, an aerobic nitrification tank 3, and a phosphorus removal sedimentation tank 4 are arranged on the right side of the sedimentation and equalization tank 1. A grid 6 is installed on the upper side of the interior of the sedimentation and equalization tank 1. The sedimentation and equalization tank 1 and the biochemical denitrification reaction tank 2, the biochemical denitrification reaction tank 2 and the aerobic nitrification tank 3, and the aerobic nitrification tank 3 and the phosphorus removal sedimentation tank 4 are respectively connected by conveying pipes 7. A lift pump 8 is connected in series in the middle of the conveying pipe 7. The input end of the lift pump 8 is electrically connected to the output end of an external controller. The aquaculture wastewater is added to the sedimentation and equalization tank 1. Large debris such as plastic bags and branches are intercepted by the grid 6. After a period of time, the feces and feed in the aquaculture wastewater settle into the sludge hopper 9 at the bottom of the sedimentation and equalization tank 1. The lift pump 8 operates to transport the aquaculture wastewater from the sedimentation and equalization tank 1 through the conveying pipes, passing through the biochemical denitrification reaction tank 2 and the aerobic nitrification tank 3 to the phosphorus removal sedimentation tank 4. The sedimentation and equalization tank 1 is equipped with a sludge hopper 9 at its lower end, and the phosphorus removal sedimentation tank 4 is also equipped with a sludge hopper 9 at its lower end. The biochemical denitrification reaction tank 2 has a support frame 10 inside, and uniformly distributed biological composite packing material 11 is placed inside the support frame 10. The upper ends of the biological composite packing material 11 are fixedly connected to the upper sidewall of the support frame 10, and the lower ends of the biological composite packing material 11 are fixedly connected to the lower sidewall of the support frame 10. The biological composite packing material 11 fills the interior of the support frame 10. The aerobic nitrification tank 3 has a bioreactor 12 inside (the bioreactor 12 can be a biofilm reactor). The biofilm reactor (BFR) 12 is a water treatment device that utilizes microorganisms to attach to the surface of packing material and form a biofilm structure. It belongs to the biofilm method in wastewater biological treatment technology, and is parallel to the activated sludge method. Its core principle is to use packing material to provide a carrier, allowing microorganisms to grow, metabolize, and decompose organic pollutants in the water on the surface. The front sides of the biochemical denitrification reaction tank 2, aerobic nitrification tank 3, and phosphorus removal sedimentation tank 4 are respectively equipped with carbon addition pipe 13, oxygenation pipe 14, and feed pipe 15. When the aquaculture effluent flows through the biochemical denitrification reaction tank 2, it passes through the support frame. The biological composite packing material 11 filled within the 10 tank effectively removes organic pollutants from the effluent. Through the action of anaerobic or anoxic microorganisms (such as denitrifying bacteria), it converts nitrates and nitrites in the water into nitrogen gas, which is released into the air. Carbon sources (such as glucose and sodium acetate) can be added appropriately through the carbon addition tube 13 to provide energy for the denitrifying bacteria and improve denitrification efficiency. When the aquaculture effluent flows through the aerobic nitrification tank 3, it enters the bioreactor 12. Microorganisms in the biofilm attach to the surface of the packing material within the bioreactor 12, and through adsorption and biodegradation... To remove organic pollutants from the water, oxygen can be added to the aerobic nitrification tank 3 through the oxygenation pipe 14 via external aeration equipment to facilitate the survival of microorganisms. After the aquaculture effluent reaches the phosphorus removal sedimentation tank 4, a small amount of chemical phosphorus removal agent is added to the phosphorus removal sedimentation tank 4 through the feeding pipe 15 to make the phosphate in the effluent form an insoluble precipitate. After standing for a period of time, the precipitate settles into the sludge hopper 9, and the treated effluent can be discharged. When a certain amount of sludge settles in the sludge hopper 9, the sludge can be pumped out from the sludge hopper 9 by an external sludge pump. Fixing mechanism 5 includes a placement frame 51, positioning posts 52, positioning holes 53, rotating shafts 54, fixing frames 55, and a drive assembly 56. The placement frame 51 is located on the upper inner wall of the sedimentation and equalization tank 1. The upper surface of the placement frame 51 is provided with evenly distributed positioning posts 52. Positioning holes 53 are opened at the four corners of the upper surface of the frame of the grid 6. The positioning posts 52 are inserted into the interior of adjacent positioning holes 53. Rotating shafts 54 are rotatably connected to the front and rear sides of the interior of the sedimentation and equalization tank 1 via the drive assembly 56. Fixing frames 55 are fixedly fitted onto the outer surface of the rotating shafts 54. Two fixing frames... The lower surfaces of all five shafts 55 are in contact with the upper surfaces of the frame of the same grid 6. The drive assembly 56 includes a worm gear 561, a rotating rod 562, and a worm 563. The left end of each shaft 54 ​​passes through the left wall of the sedimentation and equalization tank 1 and is equipped with a worm gear 561. The rotating rod 562 is rotatably connected inside the protective cover on the left side of the sedimentation and equalization tank 1. The worms 563 are symmetrically arranged on the left and right sides of the outer surface of the rotating rod 562. The worm gears 561 are all meshed with the worms 563 on the same side. (The worm gears 561 and worms 563 are all located inside the protective cover, which protects the worm gears 561 and worms 563.) The transmission is unaffected by the external environment. The drive assembly 56 also includes a motor 564. The motor 564 is located on the front side of the protective cover. The rear end of the output shaft of the motor 564 is fixedly connected to the front end of the rotating rod 562. The input end of the motor 564 is electrically connected to the output end of an external controller. When the grille 6 is damaged, the motor 564 is controlled to work by the external controller. The output shaft of the motor 564 drives the rotating rod 562 to rotate. The rotation of the rotating rod 562 drives the worm gear 563 to rotate. Since the worm gears 563 on both sides are symmetrical, the rotation of the rotating rod 562 is transmitted through the worm wheel 561. The rotating shafts 54 on both sides rotate in opposite directions. The rotation of the rotating shafts 54 causes the fixing frame 55 to rotate, releasing the downward pressure on the frame of the grid 6. The grid 6 can then be removed from the sedimentation and equalization tank 1. The new grid 6 is placed on the placement rack 51. At this time, the positioning pin 52 is inserted into the positioning hole 53, and the output shaft of the motor 564 reverses, causing the fixing frame 55 to reverse around the rotating shaft 54 ​​until the lower surface of the fixing frame 55 contacts the upper surface of the frame of the grid 6. The grid 6 is then pressed down and fixed on the placement rack 51 in the sedimentation and equalization tank 1, completing the replacement of the grid 6.

[0016] The working principle of the aquaculture wastewater treatment system provided by this utility model is as follows: Aquaculture wastewater is added to a sedimentation and equalization tank 1. Large debris such as plastic bags and branches are intercepted by the grid 6. After a period of time, the feces and feed in the wastewater settle into the sludge hopper 9 at the bottom of the sedimentation and equalization tank 1. The lift pump 8 operates to transport the wastewater through a pipeline from the sedimentation and equalization tank 1, sequentially through a biological denitrification reaction tank 2 and an aerobic nitrification tank 3, to a phosphorus removal sedimentation tank 4. When the wastewater flows through the biological denitrification reaction tank 2, it passes through the biological composite packing material 11 filled in the support 10, effectively removing organic pollutants from the wastewater. Furthermore, the anaerobic digester... The action of anaerobic or anaerobic microorganisms (such as denitrifying bacteria) converts nitrates and nitrites in the water into nitrogen gas, which is released into the air. Carbon sources (such as glucose or sodium acetate) can be added appropriately through carbon addition pipe 13 to provide energy for the denitrifying bacteria and improve nitrogen removal efficiency. When the aquaculture effluent flows through aerobic nitrification tank 3, it enters bioreactor 12. Microorganisms in the biofilm attach to the surface of the packing material in bioreactor 12, removing organic pollutants from the water through adsorption and biodegradation. Oxygen can be added to aerobic nitrification tank 3 through oxygen addition pipe 14 via external aeration equipment to maintain the survival of microorganisms. After the effluent reaches the phosphorus removal sedimentation tank 4, a small amount of chemical phosphorus removal agent is added to the sedimentation tank 4 through the feed pipe 15, causing the phosphates in the effluent to form insoluble precipitates. The effluent is then allowed to stand for a period of time, waiting for the precipitates to settle into the sludge hopper 9. The treated effluent can then be discharged. Once a certain amount of sludge has settled in the sludge hopper 9, the sludge is pumped out of the sludge hopper 9 using an external sludge pump. When the screen 6 is damaged, the motor 564 is controlled by an external controller. The output shaft of the motor 564 drives the rotating rod 562 to rotate, and the rotation of the rotating rod 562 drives the worm gear 563 to rotate. Because the worm gears 563 on both sides are symmetrical... Therefore, the rotation of the rotating rod 562 drives the rotating shafts 54 on both sides to rotate in opposite directions through the worm gear 561. The rotation of the rotating shafts 54 drives the fixed frame 55 to rotate, releasing the downward pressure on the frame of the grid 6, so that the grid 6 can be taken out from the sedimentation and equalization tank 1. The new grid 6 is placed on the placement rack 51. At this time, the positioning pin 52 is inserted into the positioning hole 53, and the output shaft of the motor 564 reverses, causing the fixed frame 55 to reverse around the rotating shaft 54 ​​until the lower surface of the fixed frame 55 contacts the upper surface of the frame of the grid 6, pressing the grid 6 down and fixing it on the placement rack 51 in the sedimentation and equalization tank 1, thus completing the replacement of the grid 6.

[0017] It is worth noting that the motor 564 disclosed in the above embodiments can be a YP-100 series, the booster pump 8 can be a SLW series centrifugal pump, and the external controller controls the operation of the motor 564 and the booster pump 8 using methods commonly used in the prior art.

[0018] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wastewater treatment system for aquaculture, characterized in that: It includes a sedimentation equalization tank (1) and a fixing mechanism (5); The right side of the sedimentation equalization tank (1) is provided with a biochemical denitrification reaction tank (2), an aerobic nitrification tank (3) and a phosphorus removal sedimentation tank (4) from left to right. A grid (6) is installed on the upper side of the interior of the sedimentation equalization tank (1). Fixed mechanism (5): It includes a placement frame (51), positioning column (52), positioning hole (53), rotating shaft (54), fixed frame (55) and drive assembly (56). The inner wall of the sedimentation and conditioning tank (1) is provided with a placement frame (51). The upper surface of the placement frame (51) is provided with evenly distributed positioning columns (52). The upper surface of the frame of the grid (6) is provided with positioning holes (53) at the four corners. The positioning columns (52) are inserted into the interior of the adjacent positioning holes (53). The front and rear sides of the interior of the sedimentation and conditioning tank (1) are rotatably connected to the rotating shaft (54) through the drive assembly (56). The outer surface of the rotating shaft (54) is fixedly fitted with a fixed frame (55). The lower surface of the two fixed frames (55) is in contact with the upper surface of the frame of the same grid (6).

2. The aquaculture wastewater treatment system according to claim 1, characterized in that: The drive assembly (56) includes a worm gear (561), a rotating rod (562), and a worm (563). The left end of the rotating shaft (54) passes through the left wall of the sedimentation and conditioning tank (1) and is provided with a worm gear (561). The rotating rod (562) is rotatably connected inside the protective cover on the left side of the sedimentation and conditioning tank (1). The worm (563) is symmetrically arranged on the left and right sides of the outer surface of the rotating rod (562). The worm gear (561) is meshed with the worm (563) on the same side.

3. The aquaculture wastewater treatment system according to claim 2, characterized in that: The drive assembly (56) also includes a motor (564), the front side of the protective cover is provided with the motor (564), the rear end of the output shaft of the motor (564) is fixedly connected to the front end of the rotating rod (562), and the input end of the motor (564) is electrically connected to the output end of the external controller.

4. The aquaculture wastewater treatment system according to claim 1, characterized in that: The sedimentation and conditioning tank (1) and the biochemical denitrification reaction tank (2), the biochemical denitrification reaction tank (2) and the aerobic nitrification tank (3), and the aerobic nitrification tank (3) and the phosphorus removal sedimentation tank (4) are connected by conveying pipes (7). The middle part of the conveying pipes (7) is connected in series with lift pumps (8), and the input end of the lift pumps (8) is electrically connected to the output end of the external controller.

5. The aquaculture wastewater treatment system according to claim 1, characterized in that: The sedimentation and equalization tank (1) is provided with a sludge hopper (9) at its lower end, and the phosphorus removal sedimentation tank (4) is also provided with a sludge hopper (9) at its lower end.

6. The aquaculture wastewater treatment system according to claim 1, characterized in that: The biochemical denitrification reaction tank (2) is equipped with a support (10), and the support (10) is equipped with a uniformly distributed biological composite packing (11). The aerobic nitrification tank (3) is equipped with a bioreactor (12).

7. The aquaculture wastewater treatment system according to claim 1, characterized in that: The front side of the biochemical denitrification reaction tank (2), aerobic nitrification tank (3) and phosphorus removal sedimentation tank (4) are respectively equipped with a carbon addition pipe (13), an oxygen addition pipe (14) and a feed pipe (15).

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