Culture tail water filter dam

Abstract

The utility model discloses a breeding tail water filter dam which comprises a dam body, a water inlet is formed in the water inlet side of the dam body, a water outlet is formed in the water outlet side of the dam body, a cavity communicated with the water inlet and the water outlet is formed in the dam body, and a grating unit, an elastic filler unit and a ceramsite filter unit are sequentially arranged in the cavity in the water flow direction. The grating unit is arranged corresponding to the water inlet, and the ceramsite filtering unit is arranged corresponding to the water outlet. The filter dam can perform multi-stage treatment on aquaculture tail water, improves the tail water treatment effect, reduces the occurrence of blockage in the water inlet and filtering process, so that the filter dam can stably run for a long time, and meanwhile, can reduce the cleaning frequency, prolong the cleaning period and greatly reduce the labor intensity.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail water treatment technical field especially relates to a kind of aquaculture tail water filter dam. BACKGROUND

[0002] In recent years, China's freshwater pond aquaculture industry has developed rapidly, and its position in freshwater aquaculture is increasingly important. The 2023 National Fishery Economic Statistics Bulletin shows that the total area of aquaculture in China in 2023 was 7624.60 thousand hectares, with a production of 5809.61 million tons. Pond aquaculture accounts for nearly 50% of freshwater aquaculture production, and has become the main form of aquaculture in China and the main source of water product supply. It plays an important role in ensuring high-quality animal protein supply, promoting agricultural efficiency and farmers' income, and expanding rural employment.

[0003] Currently, freshwater aquaculture areas face many problems and challenges. The main form of aquaculture is scattered and contiguous farming, which has problems such as extensive farming mode and high stocking density. On the one hand, it can cause serious endogenous pollution in the aquaculture pond, deteriorate water quality, and lead to frequent diseases of the cultured objects. On the other hand, a large amount of residual feed and excrement of aquatic animals is directly discharged into natural water bodies without treatment, leading to increasing eutrophication of the surrounding water bodies, causing great pressure on the ecological environment, and becoming a limiting factor for the healthy and sustainable development of freshwater aquaculture. To implement the requirements of scientific prevention and control of agricultural non-point source pollution, fight the pollution prevention and control battle, promote the green and high-quality development of fishery aquaculture, and promote ecological environmental protection, the Ministry of Agriculture and Rural Affairs has released the "National Pond Aquaculture Water Governance Transition Construction Plan (2021-2035)", implemented the "Five Actions" for the promotion of green aquaculture technology, proposed the promotion and application of various forms of water health aquaculture technology and aquaculture tail water treatment technology, and promoted the comprehensive utilization or standard discharge of water aquaculture tail water resources.

[0004] The concentrated and contiguous freshwater pond aquaculture mode mainly uses the "three ponds and two dams" tail water treatment process. The tail water treatment facility unit includes ecological ditches, sedimentation tanks, filter dams, aeration tanks, and ecological purification tanks. Among them, the filter dam generally uses hollow bricks to build the external structure, and the dam body is filled with porous adsorption media such as ceramsite or volcanic rock, which has the functions of filtration interception, biological degradation, transformation, and absorption. However, the water passage aperture of hollow bricks is small, which can easily be blocked by leaves, weeds, and algae, affecting water flow. Moreover, conventional filter materials such as ceramsite can easily clog after long-term use of the filter dam, causing short flow problems, which seriously reduces the purification effect of the filter dam and makes the water purification capacity worse. SUMMARY

[0005] In order to solve the above-mentioned defects in the prior art, the utility model discloses a breeding tail water filter dam which can carry out multistage treatment to breeding tail water, improve tail water treatment effect and reduce the occurrence of blockage to enable the filter dam to long-term stable operation.

[0006] The utility model provides a kind of breeding tail water filter dam, comprising: dam body, the water inlet side of dam body is equipped with water inlet, the water outlet side of dam body is equipped with water outlet, the inside of dam body is the cavity that is communicated with water inlet and water outlet, cavity is successively equipped with grating unit, elastic filler unit and ceramsite filter unit along water flow direction, grating unit is set correspondingly water inlet, ceramsite filter unit is set correspondingly water outlet.

[0007] As a preferred embodiment, in the utility model, dam body is water-tight solid structure, which includes steel concrete structure and / or brick and concrete structure.

[0008] As a preferred embodiment, in the utility model, grating unit includes grating net parallel to water inlet direction, and a plurality of round holes are formed on the grating net.

[0009] As a preferred embodiment, in the utility model, elastic filler unit includes elastic filler and fixed support, and the elastic filler is laid full of elastic filler unit perpendicular to water flow direction, and both ends of the elastic filler are fixed by the fixed support.

[0010] As a preferred embodiment, in the utility model, ceramsite filter unit includes filter plate, volcanic rock area and ceramsite area successively arranged along water flow direction, and both ends of the filter plate are fixed on dam body.

[0011] As a preferred embodiment, in the utility model, a partition wall is vertically arranged in the cavity to separate the cavity into first cavity and second cavity, the bottom of the partition wall is provided with a water passage to communicate the first cavity and the second cavity, the water inlet is arranged at the upper part of the dam body corresponding to the first cavity, the grating unit and the elastic filler unit are successively arranged in the first cavity from top to bottom, the water outlet is arranged at the upper part of the dam body corresponding to the second cavity, and the ceramsite filter unit is arranged in the second cavity.

[0012] As a preferred embodiment, in the utility model, the second cavity is separated into ceramsite filter unit and backwashing unit by the vertically arranged partition wall, the bottom of the partition wall is provided with a water passage to communicate the ceramsite filter unit and the backwashing unit, and the ceramsite filter unit and the backwashing unit are both communicated with the first cavity through the water passage, the upper part of the backwashing unit is provided with an overflow pipe, and the setting position of the overflow pipe is higher than the setting position of the water outlet.

[0013] As a preferred embodiment, in the utility model, the bottom of the backwashing unit is concave with a water collecting pit, the bottom of the first cavity and the bottom position of the ceramsite filtering unit are higher than the top position of the water collecting pit, and the bottom of the first cavity and the bottom of the ceramsite filtering unit are connected with the top of the water collecting pit through a slope, and the water collecting pit is connected with a drainage device.

[0014] As a preferred embodiment, in the utility model, the overflow pipe comprises a main body part and a tee part, the main body part is fixed on the partition wall and penetrates the dam body, the setting position of the main body part is higher than the setting position of the water outlet, and the opposite two interfaces of the tee part are rotatably connected with the main body part.

[0015] As a preferred embodiment, in the utility model, the top of the dam body is provided with a grating cover plate, and the grating cover plate comprises a stainless steel cover plate and a glass steel cover plate.

[0016] The aquaculture tail water filtering dam provided by the utility model has the following technical effects:

[0017] The water inlet side of the dam body is provided with a water inlet, and the water inlet has a large diameter, so that the water inlet can be prevented from being blocked by leaves, weeds, algae and the like, thereby ensuring smooth water inlet. The cavity is sequentially provided with a grating unit, an elastic filler unit and a ceramsite filtering unit along the water flow direction, the grating unit can remove plant residues, large floating objects and suspended objects in the tail water, the elastic filler unit can preliminarily filter the tail water, intercept large suspended particles in the tail water, and remove part of organic pollutants through active sludge on the elastic filler, and the ceramsite filtering unit can further remove suspended objects, COD, TN, TP and other pollutants in the tail water. In this way, the filtering dam can perform multi-stage treatment on the aquaculture tail water, improve the tail water treatment effect, reduce the occurrence of blockage during water inlet and filtration, so that the filtering dam can be stably operated for a long time, the cleaning frequency can be reduced, the cleaning cycle can be prolonged, and the labor intensity can be greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a first vertical sectional view of the aquaculture tail water filtering dam of the utility model;

[0019] Figure 2 Fig. 1 is a first vertical sectional view of the aquaculture tail water filtering dam of the utility model;

[0020] Figure 3 Fig. 1 is a first vertical sectional view of the aquaculture tail water filtering dam of the utility model;

[0021] Figure 4 Fig. 1 is a first vertical sectional view of the aquaculture tail water filtering dam of the utility model;

[0022] Figure 5 Fig. 1 is a first vertical sectional view of the aquaculture tail water filtering dam of the utility model;

[0023] Figure 6 This is the third transverse sectional view of the aquaculture tailwater filtration dam of this utility model.

[0024] Figure label:

[0025] 1. Dam body; 11. Inlet; 12. Outlet; 13. Partition wall; 14. Water passage hole; 2. Grille unit; 21. Grille mesh; 22. Circular hole; 3. Elastic packing unit; 31. Elastic packing; 32. Fixed support; 4. Ceramsite filter unit; 41. Filter plate; 42. Volcanic rock area; 43. Ceramsite area; 5. Backwashing unit; 51. Overflow pipe; 511. Main body; 512. T-junction; 52. Sump; 53. Slope; 6. Grille cover plate; 7. Subbase layer; 8. Subbase layer; 9. Pond base surface. Detailed Implementation

[0026] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] See Figure 1 This utility model provides a filtration dam for aquaculture tailwater, comprising: a dam body 1, an inlet 11 on the inlet side of the dam body 1, an outlet 12 on the outlet side of the dam body 1, and a cavity inside the dam body 1 that communicates with the inlet 11 and the outlet 12. A grid unit 2, an elastic packing unit 3, and a ceramic granule filter unit 4 are arranged sequentially along the water flow direction inside the cavity. The grid unit 2 is set corresponding to the inlet 11, and the ceramic granule filter unit 4 is set corresponding to the outlet 12.

[0030] Taking fishpond aquaculture wastewater treatment as an example, combined with Figure 5The filter dam is constructed in the tailwater treatment area. A pit is excavated in the pond foundation to accommodate the filter dam. The bottom and sides of the filter dam are composed of a compacted subbase 8 made of plain soil. A 10-centimeter-thick concrete base layer 7 is placed on the bottom subbase 8, extending approximately 10 centimeters beyond the dam body 1, thus ensuring the dam body 1 is firmly installed. The inlet 11 and outlet 12 are located on opposite sides of the dam body 1 in the direction of water flow. After the aquaculture tailwater enters the cavity through the inlet 11, it is filtered sequentially through the grid unit 2, the elastic packing unit 3, and the ceramsite filter unit 4, before being discharged from the outlet 12 into the next treatment unit, such as the aeration tank.

[0031] Based on this, an inlet 11 is provided on the water intake side of the dam body 1. The inlet 11 has a large diameter, which can prevent clogging by leaves, weeds, algae, etc., thus ensuring smooth water intake. Inside the cavity, along the water flow direction, there are sequentially arranged a grid unit 2, an elastic packing unit 3, and a ceramic granule filter unit 4. The grid unit 2 can remove larger floating and suspended solids such as plant residues and water hyacinth from the effluent; the elastic packing unit 3 can perform preliminary filtration of the effluent, intercepting larger suspended particles, and the activated sludge on the elastic packing 31 can remove some organic pollutants; the ceramic granule filter unit 4 can further remove suspended solids, COD, TN, TP, and other pollutants from the effluent. In this way, the filter dam can perform multi-stage treatment of aquaculture effluent, improving the effluent treatment effect and reducing clogging during water intake and filtration, enabling the filter dam to operate stably for a long time. It also reduces the frequency of cleaning, extends the cleaning cycle, and greatly reduces labor intensity.

[0032] The dam body 1 is a solid, impermeable structure, comprising reinforced concrete and / or brick-concrete structures. The solid structure of the dam body 1 ensures its structural strength and prevents water seepage, allowing aquaculture wastewater to enter the cavity through the inlet 11, be filtered by the grid unit 2, elastic packing unit 3, and ceramsite filter unit 4, and then discharged from the outlet 12 to the next unit.

[0033] Combination Figure 2 The bar screen unit 2 includes a bar screen 21 arranged parallel to the water inlet direction, with several circular holes 22 on the bar screen 21. The bar screen 21 is positioned at the bottom edge of the water inlet 11, and its orientation is parallel to the water inlet direction. Thus, the aquaculture wastewater introduced through the water inlet 11 flows downwards due to gravity and inevitably passes through the bar screen 21. The circular holes 22 of the bar screen 21 only allow the aquaculture wastewater and small particulate impurities to pass through, thereby removing larger floating and suspended solids such as plant residue and water hyacinth from the wastewater.

[0034] Combination Figure 3The elastic packing unit 3 includes elastic packing material 31 and fixed supports 32. The elastic packing material 31 is laid out in a staggered pattern perpendicular to the water flow direction, and the two ends of the elastic packing material 31 in the water flow direction are fixed by the fixed supports 32. The elastic packing material 31 can be a biological brush or the like, and it is laid out in a staggered pattern perpendicular to the water flow direction. When the water flow direction is downward, the elastic packing unit 3 is located below the grid 21, and the elastic packing material 31 is laid out in a horizontal staggered pattern, and the upper and lower ends of the elastic packing material 31 are fixed by the fixed supports 32. The fixed supports 32 are made of threaded steel and are fixed to the dam body 1.

[0035] Combination Figure 2 and Figure 3 The expanded clay filter unit 4 includes a filter plate 41, a volcanic rock zone 42, and an expanded clay zone 43 arranged sequentially along the water flow direction. The two ends of the filter plate 41 are fixed to the dam body 1. The filter plate 41 has several filter holes. The volcanic rock zone 42 is filled with several volcanic rocks, and the expanded clay zone 43 is filled with several expanded clay particles. The sequential arrangement of the filter plate 41, the volcanic rock zone 42, and the expanded clay zone 43 can further enhance the purification effect of aquaculture wastewater.

[0036] When the packing material in the ceramsite filter unit 4 becomes clogged, manual cleaning is generally required. However, existing filter dams typically use side-in / side-out or bottom-in / top-out water inflow and outflow methods. The filter dam is connected to adjacent units such as sedimentation tanks and aeration tanks, resulting in significant water level fluctuations. When packing material needs to be cleaned, the tailwater inside the filter dam cannot be pumped out separately, making cleaning difficult. In this utility model, see [reference needed]. Figure 1 A vertical partition wall 13 is provided inside the cavity to divide the cavity into a first cavity and a second cavity. A water passage hole 14 is provided at the bottom of the partition wall 13 to connect the first cavity and the second cavity. The water inlet 11 is located on the upper part of the dam body 1 corresponding to the first cavity. The grid unit 2 and the elastic packing unit 3 are arranged in the first cavity from top to bottom. The water outlet 12 is located on the upper part of the dam body 1 corresponding to the second cavity. The ceramic granule filter unit 4 is located in the second cavity.

[0037] The partition wall 13 can be set in the middle area to divide the cavity into a first cavity and a second cavity. After the aquaculture effluent enters the first cavity through the inlet 11, it first flows downward and passes through the grid unit 2 to remove larger floating and suspended matter such as plant residue and water hyacinth. Then, it passes through the elastic packing unit 3 to perform preliminary filtration of the effluent, intercepting larger suspended particles in the effluent. Some organic pollutants can also be removed by the activated sludge on the elastic packing 31. Then, it flows into the second cavity through the water passage 14 at the bottom of the partition wall 13 between the first cavity and the second cavity. As more and more aquaculture effluent is introduced, the water level in the second cavity rises to flow upward through the ceramic granule filter unit 4 to remove suspended matter, COD, TN, TP and other pollutants in the effluent. Then, it flows upward and is discharged through the outlet 12 to the next treatment unit. In this way, the filter dam innovatively adopts an upward inlet and outlet water flow method. The water flow direction for treating aquaculture wastewater is U-shaped. When blockage occurs in the filter dam, the wastewater in the cavity can be pumped out without lowering the water level of the filter dam's associated treatment units such as sedimentation tanks, aeration tanks, and ecological purification tanks. This completely solves the problem of synchronous water level changes between the filter dam and adjacent tanks. Thus, when blockage occurs in the filter dam, the wastewater can be pumped out for flushing, reducing the difficulty of flushing.

[0038] Since the water flow direction in the first cavity is downward, the elastic packing unit 3 is located below the grid 21. The elastic packing 31 is laid in a horizontal staggered pattern, and the upper and lower ends of the elastic packing 31 are fixed by the fixing bracket 32. The ceramsite filter unit 4 is located in the second cavity, where the water flow direction is upward. The filter plate 41, the volcanic rock zone 42, and the ceramsite zone 43 are arranged sequentially from bottom to top. The two ends of the filter plate 41 are fixed to the corresponding partition wall 13 and dam body 1, and the filter plate 41 can support the volcanic rock zone 42 and the ceramsite zone 43.

[0039] Furthermore, existing filter dams require manual cleaning when the internal packing material becomes clogged, which is challenging even when the packing material is placed inside a mesh bag. To address this issue, refer to... Figures 2-4The second cavity is divided into a ceramic granule filter unit 4 and a backwashing unit 5 by a vertically arranged partition wall 13. A water passage hole 14 is provided at the bottom of the partition wall 13 to connect the ceramic granule filter unit 4 and the backwashing unit 5. Both the ceramic granule filter unit 4 and the backwashing unit 5 are connected to the first cavity through the water passage hole 14. An overflow pipe 51 is provided at the top of the backwashing unit 5, and the overflow pipe 51 is positioned higher than the outlet 12. The ceramic granule filter unit 4 and the backwashing unit 5 are preferably arranged adjacent to each other. Two ceramic granule filter units 4 can be provided, one on each side of the backwashing unit 5. After the aquaculture wastewater is treated in the first cavity, it flows into the second cavity through the corresponding water passage hole 14, causing the water level in the backwashing unit 5 and the ceramic granule filter unit 4 to rise. Generally, the water levels in the backwashing unit 5 and the ceramic granule filter unit 4 are the same. Since the outlet 12 is lower than the overflow pipe 51, the aquaculture wastewater is filtered by the ceramic granule filter unit 4 and discharged through the outlet 12. No water is discharged from the overflow pipe 51 of the backwashing unit 5. As the wastewater treatment process continues for an extended period, the clogging of the ceramsite filter unit 4 worsens, making water flow difficult and increasing head loss. This creates a level difference between the inlet and outlet of the filter dam, causing the liquid level in the backwash unit 5 to gradually rise to the overflow pipe 51, resulting in overflow. At this point, the operator can detect the clogging and drain the wastewater from the filter dam to flush the ceramsite filter unit 4. This filter dam, through an optimized backwashing process, allows for direct flushing of the packing material and filter media using a water gun. The flushing method is simple and significantly reduces labor intensity compared to manual cleaning of the packing material. It should be noted that the height difference between the overflow pipe 51 and the outlet 12 is determined according to requirements.

[0040] Combination Figure 5 and Figure 6 The bottom of the backwashing unit 5 is recessed with a water collection pit 52. The bottom of the first cavity and the bottom of the ceramic granule filter unit 4 are both higher than the top of the water collection pit 52. The bottom of the first cavity and the bottom of the ceramic granule filter unit 4 are connected to the top of the water collection pit 52 via a ramp 53. The water collection pit 52 is connected to a drainage device. This filter dam, through optimized backwashing process, allows direct washing of the packing material and filter media with a water gun. The backwash water flows into the water collection pit 52 via the ramp 53, so that after washing, the wastewater in the water collection pit 52 can be discharged using a drainage device, for example, by using a submersible pump to discharge the wastewater to a sedimentation tank for treatment.

[0041] See Figure 4The overflow pipe 51 includes a main body 511 and a three-way connector 512. The main body 511 is fixed to the partition wall 13 and extends through the dam body 1. The main body 511 is positioned higher than the outlet 12. The two opposite ports of the three-way connector 512 are rotatably connected to the main body 511. The other port of the three-way connector 512 is used for water inlet. When the ceramsite filter unit 4 is significantly clogged and the liquid level difference increases, causing the liquid level of the backwash unit 5 to reach the overflow pipe 51, water enters through the other port of the three-way connector 512 and is discharged from the dam body 1 through the main body 511. In this way, the operator can be aware of the blockage and drain the tailwater in the filter dam to flush the ceramsite filter unit 4.

[0042] The two opposite ports of the three-way section 512 are rotatably connected to the main body section 511. The three-way section 512 is not fixedly connected to the main body section 511. The three-way section 512 can rotate to adjust the height of the other port, thereby controlling the height of the overflow water to meet different needs.

[0043] In addition, see Figure 1 The top of the dam body 1 is covered with a grating cover 6, which includes stainless steel and fiberglass covers. The grating cover 6 blocks sunlight, preventing algae or weeds from growing and clogging the grating unit 2, elastic filler unit 3, and ceramsite filter unit 4, thus ensuring the dam's treatment effect. Furthermore, the stainless steel and fiberglass cover structures of the grating cover 6 allow for daily passage.

[0044] It is worth noting that the filter dam can be made into an integrated device with a modular design. Quality is guaranteed through factory prefabrication, and it can be used immediately upon on-site hoisting, which can greatly shorten the construction period and reduce project costs.

[0045] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A filter dam for aquaculture wastewater, characterized in that, include: The dam body has an inlet on the inlet side and an outlet on the outlet side. The interior of the dam body is a cavity that communicates with the inlet and the outlet. Inside the cavity, along the water flow direction, there are sequentially arranged a grid unit, an elastic packing unit, and a ceramsite filter unit. The grid unit is set corresponding to the inlet, and the ceramsite filter unit is set corresponding to the outlet.

2. The aquaculture wastewater filtration dam according to claim 1, characterized in that: The dam body is an impermeable solid structure, which includes reinforced concrete and / or brick-concrete structure.

3. The aquaculture wastewater filtration dam according to claim 1, characterized in that: The bar screen unit includes a bar screen arranged parallel to the water inlet direction, and the bar screen has several circular holes.

4. The aquaculture wastewater filtration dam according to claim 1, characterized in that: The elastic packing unit includes elastic packing and a fixed support. The elastic packing is laid in a staggered pattern perpendicular to the water flow direction to cover the elastic packing unit, and the two ends of the elastic packing are fixed by the fixed support.

5. The aquaculture wastewater filtration dam according to claim 1, characterized in that: The ceramsite filtration unit includes a filter plate, a volcanic rock zone, and a ceramsite zone arranged sequentially along the water flow direction, with both ends of the filter plate fixed to the dam body.

6. The aquaculture wastewater filtration dam according to any one of claims 1-5, characterized in that: A vertical partition wall is provided inside the cavity to divide the cavity into a first cavity and a second cavity. The bottom of the partition wall is provided with a water passage hole to connect the first cavity and the second cavity. The water inlet is located on the upper part of the dam body corresponding to the first cavity. The grid unit and the elastic packing unit are arranged sequentially from top to bottom in the first cavity. The water outlet is located on the upper part of the dam body corresponding to the second cavity. The ceramic granule filter unit is located in the second cavity.

7. The aquaculture wastewater filtration dam according to claim 6, characterized in that: The second cavity is separated into the ceramic granule filtration unit and the backwashing unit by a vertically arranged partition wall. The bottom of the partition wall is provided with a water passage hole to connect the ceramic granule filtration unit and the backwashing unit. Both the ceramic granule filtration unit and the backwashing unit are connected to the first cavity through the water passage hole. The upper part of the backwashing unit is provided with an overflow pipe, and the overflow pipe is positioned higher than the outlet.

8. The aquaculture wastewater filtration dam according to claim 7, characterized in that: The bottom of the backwashing unit is recessed with a water collection pit. The bottom of the first cavity and the bottom of the ceramic granule filter unit are both higher than the top of the water collection pit. The bottom of the first cavity and the bottom of the ceramic granule filter unit are connected to the top of the water collection pit by a ramp. The water collection pit is connected to a drainage device.

9. The aquaculture wastewater filtration dam according to claim 7, characterized in that: The overflow pipe includes a main body and a tee section. The main body is fixed to the partition wall and extends through the dam body. The main body is positioned higher than the outlet. The two opposite ports of the tee section are rotatably connected to the main body.

10. The aquaculture wastewater filtration dam according to any one of claims 1-5, characterized in that: The top of the dam is covered with a grating cover plate, which includes a stainless steel cover plate and a fiberglass cover plate.

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