Sewage treatment system

Abstract

The utility model discloses a sewage treatment system, which relates to the technical field of sewage treatment, and comprises a sewage collection tank, a hydrolysis acidification tank and a clean water tank, a floating component is arranged in the hydrolysis acidification tank and comprises a guide frame, a motor is mounted above one side of the hydrolysis acidification tank, the output end of the motor is connected with a screw rod, and the screw rod is connected with the guide frame. A sliding table is connected to the top of the lead screw, and a collecting frame penetrates through the top and bottom of the sliding table. Through the arrangement of the floating removal assembly, after the motor is started, the output end drives the lead screw to rotate, after the lead screw rotates, the sliding table carries the collecting frame to translate towards the flow guide frame in cooperation with guiding of the guide rod, after the collecting frame translates, floating objects are blocked through the filter plate, and water flow can penetrate through the collecting frame; when the collecting frame is close to the flow guide frame, the rollers are influenced by the first guide frame to obliquely move upwards, and meanwhile the rollers drive the collecting frame to move upwards; translation and lifting work can be completed through a single driver, a collecting structure does not need to be disassembled and assembled, energy consumption is reduced, and operation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment system. Background Art

[0002] Domestic sewage includes toilet water, bath water, vegetable washing water, rice washing water, laundry water, etc. Direct discharge of these sewage will cause a certain degree of pollution to the water body. Therefore, domestic sewage also needs to be treated before discharge. First, domestic sewage is collected into the sewage treatment system, and CODcr and BOD in the sewage are removed through interception, sand settling tank, anaerobic hydrolysis tank and artificial wetland. 5 NH 3 -N, TP and other pollutants are degraded by microbial strains, filtered by combined fillers, absorbed, transformed, decomposed and removed by the roots of aquatic flowers and plants, thus completing the treatment of domestic sewage.

[0003] A hydrolysis acidification tank with application number 202321522783.0 includes a tank body, a discharge pipe is installed at the other end of the tank body, fixed plates are installed on both sides of the upper end of the tank body, a screw is rotatably connected between the fixed plates, one end of the screw passes through the fixed plate through a connecting shaft, a rotating motor is installed at one end of the fixed plate, the output end of the rotating motor is connected to the fixed plate, a threaded block is threadedly connected to the surface of the screw, a fixed rod is installed at the front and rear parts of the lower end of the threaded block, a mounting plate is movably installed on the surface of the fixed rod, a floating block is provided at the front and rear parts of the lower end of the mounting plate, a sieve plate is detachably installed on the mounting plate, and a temporary storage frame is installed at one end of the sieve plate away from the mounting plate. The utility model drives the screw to rotate by a rotating motor, and the screw drives the mounting plate on the surface of the fixed rod to move through the threaded block. The sieve plate on the mounting plate can drive the floating garbage on the surface of the hydrolysis acidification tank to move, so as to clean the floating objects on the surface of the hydrolysis acidification tank, which is convenient and quick to clean and safe to use.

[0004] Although this technical solution can automatically clean floating objects on the surface of the hydrolysis acidification tank, it requires a motor to drive the collection structure to move horizontally, and another motor to lift the collection structure. The procurement cost and energy consumption are both high. At the same time, the staff are required to dismantle and clean the collection structure later, which makes the operation more cumbersome. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a sewage treatment system to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sewage treatment system, comprising a sewage collection tank, a hydrolysis and acidification tank and a clear water tank, a defloating assembly is arranged inside the hydrolysis and acidification tank, and the defloating assembly comprises a guide frame, a motor is installed above one side of the hydrolysis and acidification tank, a screw rod is connected to the output end of the motor, and a slide is connected to the top of the screw rod, a collection frame is penetrated through the top and bottom of the slide, and a filter plate is connected to the inside of the collection frame, a roller is penetrated through the top of the back of the collection frame, a first guide frame and a second guide frame are respectively connected to the top of the hydrolysis and acidification tank, and a movable guide frame is connected to one side of the second guide frame.

[0007] By adopting the above technical solution, after the motor is started, the output end drives the screw to rotate. After the screw rotates, the slide table carries the collection rack and moves in the direction of the guide rack in cooperation with the guidance of the guide rod. After the collection rack moves in the direction of the guide rack, the floating objects are blocked by the filter plate so that the water flow can pass through. At the same time, the roller rolls on the first guide rack. When the collection rack is close to the guide rack, the roller is affected by the first guide rack and moves upward. At the same time, the roller drives the collection rack to move upward, thereby avoiding the collision between the collection rack and the guide rack. Then the roller collides with the movable guide rack, causing the movable guide rack to rotate upward. When the roller When it is away from the movable guide frame, the movable guide frame rotates downward due to gravity. After the collecting frame moves to the top of the guide frame, the floating objects fall on the top of the guide frame through the inclination of the filter plate. After the dumping is completed, the motor output end is reversed to make the slide and the collecting frame retreat. When the collecting frame retreats, the roller rolls from the first guide frame to the movable guide frame and then to the second guide frame. As the slide and the collecting frame continue to retreat, the roller falls from the second guide frame back to the first guide frame, so that the collecting frame returns to the sewage and resets to prepare for the next removal of floating objects.

[0008] Furthermore, an inspection door is connected to one side of the hydrolysis acidification tank, and both sides and the bottom of the guide frame are sloped.

[0009] By adopting the above technical solution, when the sewage passes through the hydrolysis acidification tank, the floating objects are guided by the slope at the bottom of the guide frame to prevent the floating objects from accumulating at the bottom of the guide frame, and the sewage is blocked by the right side of the guide frame to prevent the sewage from being discharged from the inspection door. After the collecting rack moves to the top of the guide frame, the floating objects are caused to fall on the top of the guide frame by the inclination of the filter plate, and the fallen floating objects are guided by the slope on the left side of the guide frame to roll toward the inspection door.

[0010] Furthermore, a guide rod passes through one side of the slide, and the guide rod is fixedly connected to the hydrolysis acidification tank.

[0011] By adopting the above technical solution, after the screw rod rotates, it cooperates with the guidance of the guide rod to make the slide table carrying the collection rack translate in the direction of the guide rack.

[0012] Furthermore, the slide is threadedly connected to the lead screw, and the slide is slidably connected to the guide rod.

[0013] By adopting the above technical solution, after the motor is started, the output end drives the screw to rotate. After the screw rotates, it cooperates with the guidance of the guide rod to make the slide carrying the collection rack translate in the direction of the guide rack. After the collection rack translates, the floating objects are blocked by the filter plate to allow the water flow to pass through.

[0014] Furthermore, the collecting rack is slidably connected to the slide table.

[0015] By adopting the above technical solution, when the collecting rack is close to the guide rack, the roller is affected by the first guide rack to move upwards, and at the same time the roller drives the collecting rack to move upwards, thereby avoiding the collection rack from colliding with the guide rack.

[0016] Furthermore, the filter plate is arranged at an angle, and the bottom of the collecting frame is sloped, and the slope of the bottom of the collecting frame is parallel to the upper right side of the guide frame.

[0017] By adopting the above technical solution, after the collecting rack moves to the top of the guide rack, the floating objects fall onto the top of the guide rack through the inclination of the filter plate.

[0018] Furthermore, the movable guide frame is rotatably connected to the second guide frame, and the movable guide frame abuts against the first guide frame.

[0019] By adopting the above technical solution, the roller collides with the movable guide frame, causing the movable guide frame to rotate upward. When the roller moves away from the movable guide frame, the movable guide frame rotates downward under the influence of gravity.

[0020] Furthermore, the rollers are rollingly connected to the first guide frame, the second guide frame and the movable guide frame respectively.

[0021] By adopting the above technical solution, the roller rolls on the first guide frame, and then the roller is affected by the first guide frame to tilt and move upward, and then the roller collides with the movable guide frame, causing the movable guide frame to rotate upward, and when the roller moves away from the movable guide frame, the movable guide frame rotates downward due to the influence of gravity, and when the collecting rack retreats, the roller rolls from the first guide frame to the movable guide frame and then to the second guide frame.

[0022] Furthermore, one side of the sewage collection tank is connected to a primary sedimentation tank through a submerged flow pipe, and the primary sedimentation tank and the hydrolysis acidification tank are connected through a submerged flow pipe. One side of the hydrolysis acidification tank is connected to a biochemical anaerobic tank through a submerged flow pipe, and one side of the biochemical anaerobic tank is connected to a secondary sedimentation tank through a submerged flow pipe. The clear water tank is located on the side of the secondary sedimentation tank.

[0023] By adopting the above technical solution, the sewage is transported by the submerged pipe through the height difference between multiple tanks using gravity to pass through the primary sedimentation tank, hydrolysis acidification tank, biochemical anaerobic tank, secondary sedimentation tank and clear water tank in sequence for treatment.

[0024] Furthermore, one side of the secondary sedimentation tank is connected to the primary plant ecological pool through a submerged flow pipe, and one side of the primary plant ecological pool is connected to the secondary plant ecological pool through a submerged flow pipe. The clear water pool and the secondary plant ecological pool are connected through a submerged flow pipe, and one side of the clear water pool is connected to an ornamental fish pond through a submerged flow pipe.

[0025] By adopting the above technical solution, the treated sewage is then stored in the ornamental fish pond. At the same time, four-season plants are planted in the primary plant ecological pool and the secondary plant ecological pool, and the roots of the four-season plants are combined with gravel to form a natural filter net, so as to facilitate the fine filtration of tiny molecules and the full absorption of nutrients, which is very beautiful.

[0026] In summary, the utility model mainly has the following beneficial effects:

[0027] 1. The utility model sets a defloating assembly. After the motor is started, the output end drives the screw to rotate. After the screw rotates, it cooperates with the guide of the guide rod to make the slide carry the collection rack to move horizontally in the direction of the guide rack. After the collection rack moves horizontally, the floating objects are blocked by the filter plate so that the water flow can pass through. At the same time, the roller rolls on the first guide rack. When the collection rack is close to the guide rack, the roller is affected by the first guide rack to tilt and move upward. At the same time, the roller drives the collection rack to move upward, so as to avoid the collection rack from colliding with the guide rack. Then the roller collides with the movable guide rack, causing the movable guide rack to rotate upward. When the roller is away from the movable guide rack, the movable guide rack is affected by gravity. The influence is to rotate downward. After the collection rack moves to the top of the guide rack, the floating objects fall on the top of the guide rack through the inclination of the filter plate. After the dumping is completed, the motor output end is reversed to make the slide and the collection rack retreat. When the collection rack retreats, the roller rolls from the first guide rack to the movable guide rack and then to the second guide rack. As the slide and the collection rack continue to retreat, the roller falls from the second guide rack back to the first guide rack, so that the collection rack returns to the sewage and resets to prepare for the next removal of floating objects. A single drive can complete the translation and lifting work without disassembling the collection structure, reducing energy consumption and reducing operations.

[0028] 2. The utility model guides floating objects through the setting of the guide frame and the slope at the bottom of the guide frame to prevent the floating objects from accumulating at the bottom of the guide frame, blocks sewage through the right side of the guide frame to prevent sewage from being discharged from the inspection door, and guides the fallen floating objects through the slope on the left side of the guide frame to make the fallen floating objects roll toward the inspection door to facilitate cleaning of the floating objects; the structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a sewage treatment system diagram of the utility model;

[0030] Figure 2 This is a schematic diagram of the cross-sectional structure of the hydrolysis acidification tank of the utility model;

[0031] Figure 3 This is a schematic diagram of the screw rod structure of the utility model;

[0032] Figure 4 For the utility model Figure 3 A magnified view of the structure at A;

[0033] Figure 5 It is a schematic diagram of the side section structure of the collection rack of the utility model;

[0034] Figure 6 It is a schematic diagram of the cross-sectional structure of the collection rack of the present utility model.

[0035] In the figure: 1. sewage collection tank; 2. underflow pipe; 3. primary sedimentation tank; 4. hydrolysis acidification tank; 5. biochemical anaerobic tank; 6. secondary sedimentation tank; 7. primary plant ecological tank; 8. secondary plant ecological tank; 9. clean water tank; 10. defloating assembly; 1001. motor; 1002. screw rod; 1003. inspection door; 1004. guide frame; 1005. first guide frame; 1006. second guide frame; 1007. movable guide frame; 1008. slide; 1009. collection frame; 1010. roller; 1011. filter plate; 1012. guide rod; 11. ornamental fish pond. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0037] The following describes an embodiment of the utility model based on its overall structure.

[0038] Embodiment 1:

[0039] Sewage treatment systems, such as Figure 1-Figure 6 As shown, it includes a sewage collection tank 1, a hydrolysis and acidification tank 4 and a clean water tank 9, and a defloating component 10 is arranged inside the hydrolysis and acidification tank 4.

[0040] Specifically, the defloating assembly 10 is connected to the guide frame 1004 at the bottom of the hydrolysis acidification tank 4. Both sides and the bottom of the guide frame 1004 are sloped. The slope at the bottom of the guide frame 1004 is used to guide the floating objects to prevent the floating objects from accumulating at the bottom of the guide frame 1004. The right side of the guide frame 1004 is used to block the sewage to prevent the sewage from being discharged from the inspection door 1003. The inspection door 1003 is connected to one side of the hydrolysis acidification tank 4. The slope on the left side of the guide frame 1004 is used to guide the fallen floating objects to roll toward the inspection door 1003.

[0041] The first guide frame 1005 and the second guide frame 1006 are respectively connected to the upper part of the hydrolysis acidification tank 4, and a movable guide frame 1007 is connected to one side of the second guide frame 1006. The movable guide frame 1007 is rotatably connected to the second guide frame 1006, and the movable guide frame 1007 abuts against the first guide frame 1005. The roller 1010 rolls on the first guide frame 1005, and then the roller 1010 is tilted and displaced upward under the influence of the first guide frame 1005. Then the roller 1010 collides with the movable guide frame 1007, so that the movable guide frame 1007 rotates upward. When the roller 1010 moves away from the movable guide frame 1007, the movable guide frame 1007 rotates downward under the influence of gravity. When the collecting frame 1009 retreats, the roller 1010 rolls from the first guide frame 1005 to the movable guide frame 1007 and then rolls to the second guide frame 1006;

[0042] A motor 1001 is installed above one side of the hydrolysis acidification tank 4, and a screw rod 1002 is connected to the output end of the motor 1001, and a slide 1008 is connected to the top of the screw rod 1002, and the slide 1008 is threadedly connected to the screw rod 1002. A guide rod 1012 runs through one side of the slide 1008, and the slide 1008 is slidably connected to the guide rod 1012, and the guide rod 1012 is fixedly connected to the hydrolysis acidification tank 4;

[0043] The top and bottom of the slide 1008 are penetrated by a collecting rack 1009, the bottom of the collecting rack 1009 is sloped, the slope of the bottom of the collecting rack 1009 is parallel to the upper right side of the guide rack 1004, the collecting rack 1009 is slidably connected to the slide 1008, the inside of the collecting rack 1009 is connected with a filter plate 1011, the filter plate 1011 is tilted, and the upper back of the collecting rack 1009 is penetrated by a roller 1010, the roller 1010 is respectively connected to the first guide frame 1005, the second guide frame 1006 and the movable guide frame 1007 in a rolling manner, after the motor 1001 is started, the output end drives the screw rod 1002 to rotate, after the screw rod 1002 rotates, the slide 1008 carries the collecting rack 1009 to translate in the direction of the guide rack 1004 with the guidance of the guide rod 1012, and after the collection rack 1009 translates, the floating objects are blocked by the filter plate 1011 so that the water flow can pass through.

[0044] See also Figure 1 In the above embodiment, one side of the sewage collection tank 1 is connected to the primary sedimentation tank 3 through the submerged flow pipe 2, and the primary sedimentation tank 3 is connected to the hydrolysis acidification tank 4 through the submerged flow pipe 2. One side of the hydrolysis acidification tank 4 is connected to the biochemical anaerobic tank 5 through the submerged flow pipe 2. One side of the biochemical anaerobic tank 5 is connected to the secondary sedimentation tank 6 through the submerged flow pipe 2. The clear water tank 9 is located on the side of the secondary sedimentation tank 6. Through the height difference between the multiple tank bodies, the sewage is transported by the submerged flow pipe 2 and passes through the primary sedimentation tank 3, the hydrolysis acidification tank 4, the biochemical anaerobic tank 5, the secondary sedimentation tank 6 and the clear water tank 9 in sequence for treatment.

[0045] Embodiment 2:

[0046] On the basis of the above-mentioned embodiment 1, although the defloating component 10 is provided, the effect of simple structure and convenient use can be achieved; however, the traditional filtering components in the sewage treatment system are cumbersome to manage and need to be cleaned regularly; now, by providing a first-level plant ecological pool 7, a second-level plant ecological pool 8 and an ornamental fish pond 11, the roots of plants are used in combination with gravel to filter the sewage, which can reduce the processing work of the filtering components and is beautiful.

[0047] See also Figure 1 In the above embodiment, one side of the secondary sedimentation tank 6 is connected to the primary plant ecological pool 7 through the submerged flow pipe 2, one side of the primary plant ecological pool 7 is connected to the secondary plant ecological pool 8 through the submerged flow pipe 2, and the clean water pool 9 is connected to the secondary plant ecological pool 8 through the submerged flow pipe 2. The roots of four-season plants are combined with gravel to form a natural filter net to facilitate the fine filtration of tiny molecules and the full absorption of nutrients; one side of the clean water pool 9 is connected to the ornamental fish pond 11 through the submerged flow pipe 2, and the treated clean sewage enters the ornamental fish pond 11 for water storage.

[0048] The implementation principle of the utility model is as follows: first, the domestic sewage of rural residents is collected through the sewage collection pool 1, and then the sewage is transported by the submerged flow pipe 2 through the height difference between multiple pools by gravity, and sequentially passes through the primary sedimentation pool 3, the hydrolysis acidification pool 4, the biochemical anaerobic pool 5, the secondary sedimentation pool 6, the primary plant ecological pool 7, the secondary plant ecological pool 8 and the clean water pool 9 for treatment. The sewage is transported by gravity due to the height difference, and the daily sewage transportation does not require electricity to reduce energy consumption and make the operation cost low. The treated clean sewage is then sent into the ornamental fish pond 11 for water storage. At the same time, four-season plants are planted in the primary plant ecological pool 7 and the secondary plant ecological pool 8, and the roots of the four-season plants are used in combination with gravel to form a natural filter net, so as to facilitate the fine filtration of micromolecules and the full absorption of nutrients, and it is very beautiful.

[0049] When the sewage passes through the hydrolysis acidification tank 4, the floating objects are guided by the slope at the bottom of the guide frame 1004 to prevent the floating objects from accumulating at the bottom of the guide frame 1004, and the sewage is blocked by the right side of the guide frame 1004 to prevent the sewage from being discharged from the inspection door 1003;

[0050] When it is necessary to clean the floating objects in the hydrolysis acidification tank 4, the staff turns on the motor 1001. After the motor 1001 is started, the output end drives the screw 1002 to rotate. After the screw 1002 rotates, it cooperates with the guide of the guide rod 1012 to make the slide 1008 carry the collection rack 1009 to move in the direction of the guide rack 1004. After the collection rack 1009 moves in the direction, the floating objects are blocked by the filter plate 1011 so that the water flow can pass through. At the same time, the roller 1010 is in the first The roller 1010 is on the first guide frame 1005. When the collection frame 1009 is close to the guide frame 1004, the roller 1010 is affected by the first guide frame 1005 and moves upward. At the same time, the roller 1010 drives the collection frame 1009 to move upward, thereby preventing the collection frame 1009 from colliding with the guide frame 1004. Then, the roller 1010 collides with the movable guide frame 1007, causing the movable guide frame 1007 to rotate upward. When the roller 1010 is away from the movable guide frame 1007, the roller 1010 moves upward. At 07, the movable guide frame 1007 rotates downward under the influence of gravity, and after the collecting frame 1009 moves to the top of the guide frame 1004, the floating objects fall on the top of the guide frame 1004 through the inclination of the filter plate 1011. The fallen floating objects are guided by the slope on the left side of the guide frame 1004, and the fallen floating objects roll toward the inspection door 1003 to facilitate the cleaning of the floating objects. After the dumping is completed, the output end of the motor 1001 is reversed, so that the slide 1 008 and the collecting rack 1009 retreat. When the collecting rack 1009 retreats, the roller 1010 rolls from the first guide frame 1005 to the movable guide frame 1007 and then to the second guide frame 1006. As the slide 1008 and the collecting rack 1009 continue to retreat, the roller 1010 falls from the second guide frame 1006 and returns to the first guide frame 1005, so that the collecting rack 1009 returns to the sewage and resets to prepare for the next removal of floating objects.

[0051] It should be noted that the system diagram of the present technical solution is only a simple summary of the sewage treatment system to facilitate understanding of the general flow of the system. Its style is not for reference, and only the height position in the up and down directions is for reference. Therefore, it should not be used to limit the structural style of the present technical solution and the specific orientation of the horizontal position in the front, back, left and right directions.

[0052] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A sewage treatment system, comprising a sewage collection tank (1), a hydrolysis acidification tank (4) and a clean water tank (9), characterized in that: A defloating assembly (10) is arranged inside the hydrolysis and acidification tank (4), and the defloating assembly (10) comprises a guide frame (1004). A motor (1001) is installed above one side of the hydrolysis and acidification tank (4). The output end of the motor (1001) is connected to a screw rod (1002), and the top of the screw rod (1002) is connected to a slide table (1008). The top and bottom of the slide table (1008) are penetrated by a collecting frame (1009), and the inside of the collecting frame (1009) is connected to a filter plate (1011). A roller (1010) is penetrated above the back of the collecting frame (1009). The top of the hydrolysis and acidification tank (4) is respectively connected to a first guide frame (1005) and a second guide frame (1006), and one side of the second guide frame (1006) is connected to a movable guide frame (1007).

2. The sewage treatment system according to claim 1, characterized in that: One side of the hydrolysis and acidification tank (4) is connected to an inspection door (1003), and both sides and the bottom of the guide frame (1004) are sloped.

3. The sewage treatment system according to claim 1, characterized in that: A guide rod (1012) passes through one side of the slide (1008), and the guide rod (1012) is fixedly connected to the hydrolysis acidification tank (4).

4. The sewage treatment system according to claim 3, characterized in that: The slide (1008) is threadedly connected to the lead screw (1002), and the slide (1008) is slidably connected to the guide rod (1012).

5. The sewage treatment system according to claim 4, characterized in that: The collecting rack (1009) is slidably connected to the slide table (1008).

6. The sewage treatment system according to claim 2, characterized in that: The filter plate (1011) is arranged at an angle, and the bottom of the collecting frame (1009) is sloped, and the slope of the bottom of the collecting frame (1009) is parallel to the upper right side of the guide frame (1004).

7. The sewage treatment system according to claim 1, characterized in that: The movable guide frame (1007) is rotatably connected to the second guide frame (1006), and the movable guide frame (1007) is in abutment with the first guide frame (1005).

8. The sewage treatment system according to claim 7, characterized in that: The roller (1010) is rollingly connected to the first guide frame (1005), the second guide frame (1006) and the movable guide frame (1007) respectively.

9. The sewage treatment system according to claim 1, characterized in that: One side of the sewage collection tank (1) is connected to a primary sedimentation tank (3) via a submerged flow pipe (2), and the primary sedimentation tank (3) and the hydrolysis acidification tank (4) are connected via a submerged flow pipe (2); one side of the hydrolysis acidification tank (4) is connected to a biochemical anaerobic tank (5) via a submerged flow pipe (2), and one side of the biochemical anaerobic tank (5) is connected to a secondary sedimentation tank (6) via a submerged flow pipe (2); and the clean water tank (9) is located on the side of the secondary sedimentation tank (6).

10. The sewage treatment system according to claim 9, characterized in that: One side of the secondary sedimentation tank (6) is connected to a primary plant ecological pool (7) via a submerged flow pipe (2), and one side of the primary plant ecological pool (7) is connected to a secondary plant ecological pool (8) via a submerged flow pipe (2); the clear water pool (9) and the secondary plant ecological pool (8) are connected via a submerged flow pipe (2), and one side of the clear water pool (9) is connected to an ornamental fish pond (11) via a submerged flow pipe (2).

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