Filter dam for mariculture tail water treatment

Abstract

The application discloses a filter dam for treating tail water of mariculture, which comprises a dam foundation, a front water retaining dam and a rear water retaining dam, wherein the front water retaining dam and the rear water retaining dam are arranged on the dam foundation respectively, and the front water retaining dam and the rear water retaining dam are located on the water-approaching side and the water-backing side of the dam foundation respectively; a water inlet is arranged on the water retaining dam; a liftable weir gate is arranged in the water inlet; side filter dam bodies are oppositely arranged on the two sides between the front water retaining dam and the rear water retaining dam; a water inlet channel is formed in the passage between the side filter dam bodies; a settlement wall is arranged on the inner side of the side filter dam body; and a gap is arranged between the settlement wall and the side filter dam body, which forms a buffer zone. The filter dam has the advantages of simple structure, large filtering capacity, difficulty in blocking, stable operation and convenience in replacing the filler.

Description

Technical Field

[0001] This invention relates to a filter dam, and more particularly to a filter dam for treating marine aquaculture tailwater. Background Technology

[0002] Marine aquaculture wastewater treatment falls under the category of water treatment. Its key aspects include reducing costs and purifying water quality through improved treatment efficiency and water quality, effectively minimizing the aquaculture process's dependence on the surrounding aquatic environment. The "three-pond, two-dam" technology is a common treatment process for marine aquaculture wastewater. This technology not only offers excellent treatment results but also boasts advantages such as low construction costs, small footprint, no need for hardened land, and simple maintenance. Furthermore, it provides parameter construction schemes for each treatment unit tailored to different aquaculture species, exhibiting characteristics of low cost, strong adaptability, and high efficiency.

[0003] For example, Chinese Patent No. CN214088169U, with an authorization announcement date of August 31, 2021, discloses a comprehensive aquaculture wastewater treatment system, including an aquaculture wastewater sedimentation tank, an aeration tank, an ecological purification tank, a first filter dam, and a second filter dam. The aquaculture wastewater sedimentation tank, aeration tank, and ecological purification tank are arranged sequentially. A first filter dam is set between the aquaculture wastewater sedimentation tank and the aeration tank, and a second filter dam is set between the aeration tank and the ecological purification tank. An aeration device is installed in the aeration tank. The filter dam in this comprehensive aquaculture wastewater treatment system has the following defects: (1) water enters from the front (single-sided), resulting in a small filtration volume; (2) the filter dam is easily clogged and cannot fully exert its effect; (3) the packing material in the filter dam is inconvenient to replace. Summary of the Invention

[0004] The present invention addresses the aforementioned problems of existing filter dams by providing a filter dam for treating marine aquaculture tailwater that is simple in structure, has a large filtration capacity, is not prone to clogging, operates stably, and allows for easy replacement of the packing material.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A filter dam for treating marine aquaculture tailwater of the present invention includes a dam foundation, a front water-retaining dam, and a rear water-retaining dam. The front water-retaining dam and the rear water-retaining dam are respectively set on the dam foundation, and the front water-retaining dam and the rear water-retaining dam are respectively located on the upstream side and the downstream side of the dam foundation. The water-retaining dam is provided with an inlet, and the inlet is provided with a liftable weir gate. Side filter dam bodies are arranged opposite each other on both sides between the front water-retaining dam and the rear water-retaining dam. The channel between the side filter dam bodies forms an inlet channel. The inner side of the side filter dam body is provided with a settlement wall, and there is a gap between the settlement wall and the side filter dam body, which forms a buffer zone. The filter dam for treating marine aquaculture tailwater of this invention adopts a two-sided side-filtration design. The weir gate can be raised and lowered to adjust the size of the inlet, thereby controlling the water intake. Raising and lowering the weir gate is a conventional method in this field and will not be described in detail. After the water enters the inlet channel through the inlet, it passes through the settling walls on both sides of the inlet channel. This side-entry method reduces the impact of the water on the settling walls, lowers the water flow velocity, reduces turbulence, increases the stability of the settling walls, and also promotes uniform load distribution on the settling walls, ensuring a good settling effect. After settling through the settling walls, most of the suspended particles in the water are removed. The settling wall effectively reduces the treatment pressure on the subsequent side filter dam, making it less prone to clogging. In addition, the settling wall effectively reduces the impact load of the water on the side filter dam, ensuring the operational stability of the side filter dam. Water entering the side filter dam after passing through the settling wall is adsorbed and filtered by the packing material loaded in the dam. The adsorbed and filtered pollutants are then absorbed, decomposed, and removed by the microorganisms attached to the dam, thereby achieving the effect of purifying the water. In addition, compared with conventional front (single-sided) water inlet filtration, the filtration volume is significantly increased and the filtration efficiency is high.

[0006] Preferably, the settlement wall includes a wall body, within which a buffer settlement channel is provided. Inlet and outlet channels are provided on both sides of the buffer settlement channel, respectively connected to the buffer settlement channel. The buffer settlement channel acts as a deceleration mechanism, allowing water to slow down and remain within the channel, promoting the aggregation and growth of small particles into larger particles that then settle, thus improving the settling effect and efficiency.

[0007] Preferably, the inlet and outlet channels are symmetrically inclined, with the inlet channel inclined towards the inlet channel and the outlet channel inclined towards the outlet channel. This design allows water to enter the buffer settling channel quickly and evenly (resulting in a uniform load on the settling wall), and prevents backflow of water within the buffer settling channel. Simultaneously, sediment within the buffer settling channel is less likely to be carried into the side filter dam by the outflow, and the water can further settle within the outlet channel.

[0008] Preferably, the bottom of the buffer settling channel is provided with a second sludge collection tank, which is connected to a second drain pipe. The second sludge collection tank is used to collect sludge and other sediment that settles in the buffer settling channel and discharge it through the second drain pipe.

[0009] Preferably, a water-retaining plate is provided on the inner side of the wall, and a water inlet is provided between the lower end of the water-retaining plate and the dam foundation. A gap is provided between the water-retaining plate and the wall, forming a water inlet zone. The water-retaining plate serves to block and slow down the water, allowing the water to settle initially in the water inlet zone, thereby reducing the treatment pressure on the settlement wall.

[0010] Preferably, the inner side of the baffle plate is provided with a mesh screen, and a gap is provided between the mesh screen and the baffle plate, forming a filtering zone. The mesh screen is used to intercept larger solid objects.

[0011] Preferably, a first sludge collection trough is provided at the position of the dam foundation below the water-retaining plate, and the first sludge collection trough is connected to a second sewage pipe.

[0012] Preferably, the side filter dam is assembled from several packing modules, each consisting of a gabion and packing material filled within it. The side filter dam is constructed from these modules, facilitating packing material replacement. The packing material can be conventional materials such as volcanic rock, ceramsite, crushed stone, palm fiber, and activated carbon. Furthermore, the side filter dam can be aerated as needed.

[0013] Preferably, a limiting groove is provided on the dam foundation, and the lower part of the packing module is placed in the limiting groove. The limiting groove limits the packing module to prevent displacement and misalignment, thereby ensuring the structural stability and filtration effect of the side filter dam.

[0014] Preferably, the front and rear dams are made of reinforced concrete.

[0015] Therefore, the present invention has the following beneficial effects:

[0016] (1) The water inlet method with side water inlet is adopted, which has a large filtration capacity and high filtration efficiency;

[0017] (2) By setting up a settlement wall, the load is small and the water inlet is uniform. The side filter dam is not easy to get clogged and has good operational stability. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention.

[0019] Figure 2 yes Figure 1 Top view.

[0020] Figure 3 yes Figure 2 A cross-sectional view along the AA direction.

[0021] In the diagram: 1. Dam foundation; 2. Front dam; 3. Rear dam; 4. Inlet; 5. Weir gate; 6. Side filter dam; 7. Inlet channel; 8. Settlement wall; 9. Buffer zone; 10. Wall; 11. Buffer settlement channel; 12. Inlet channel; 13. Outlet channel; 14. Second sludge collection trough; 15. Second sewage pipe; 16. Water baffle; 17. Water outlet; 18. Inlet area; 19. Mesh grid; 20. Filtering area; 21. First sludge collection trough; 22. First sewage pipe; 23. Gabion; 24. Filler; 25. Limiting groove. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 , Figure 2 , Figure 3 The illustrated filter dam for treating marine aquaculture tailwater includes a dam foundation 1, a front retaining dam 2, and a rear retaining dam 3. The front and rear retaining dams are respectively located on the dam foundation and are constructed of reinforced concrete. The front and rear retaining dams are located on the upstream and downstream sides of the dam foundation, respectively. The retaining dams have inlets 4, and each inlet has a retractable weir gate 5. Side filter dam bodies 6 are arranged opposite each other on both sides between the front and rear retaining dams, forming an intake channel 7. A settlement wall 8 is provided on the inner side of each side filter dam body, with a gap between the settlement wall and the side filter dam body forming a buffer zone 9. The settlement wall includes a wall body 10, within which a buffer settlement channel 11 is provided. Inlet channels 12 and outlet channels 13 are provided on both sides of the buffer settlement channel, respectively connected to the buffer settlement channel. The inlet and outlet channels are symmetrically inclined, with the inlet channel inclined towards the inlet channel and the outlet channel inclined towards the outlet channel. A second sludge collection trough 14 is provided at the bottom of the buffer settling channel, and the second sludge collection trough is connected to a second sewage pipe 15. A baffle plate 16 is provided on the inner side of the wall, and a water outlet 17 is provided between the lower end of the baffle plate and the dam foundation. A gap is provided between the baffle plate and the wall, which forms an inlet area 18. A mesh grid 19 is provided on the inner side of the baffle plate, and a gap is provided between the mesh grid and the baffle plate, which forms a filter area 20. A first sludge collection trough 21 is provided at the position of the dam foundation below the baffle plate, and the first sludge collection trough is connected to a first sewage pipe 22. The side filter dam body is composed of several filler modules spliced ​​together. The filler module consists of a gabion 23 and filler 24 filled in the gabion. A limiting groove 25 is provided on the dam foundation, and the lower part of the filler module is placed in the limiting groove.

[0024] The operating principle of this invention is as follows: After the water enters the inlet channel through the inlet, it is filtered by the mesh screen and then enters the filtration area. Under the obstruction of the baffle plate, the water enters the inlet area upward through the inlet and undergoes preliminary sedimentation. The sediment settles and sinks to the first collection tank for collection and is discharged through the first sewage pipe. After preliminary sedimentation, the water enters the buffer sedimentation channel in the sedimentation wall through the inlet channel. After sedimentation in the buffer sedimentation channel, the sediment sinks down along the buffer sedimentation channel to the second collection tank for collection and is discharged through the second sewage pipe. The settled water is discharged to the buffer zone through the outlet channel and finally filtered out after being intercepted and filtered by the side filter dam.

[0025] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A filter dam for treating marine aquaculture tailwater, characterized in that, The dam includes a foundation (1), a front dam (2), and a rear dam (3). The front and rear dams are respectively located on the foundation, on the upstream and downstream sides of the foundation. Each dam has an inlet (4) with a liftable weir gate (5). Side filter dams (6) are arranged opposite each other on both sides of the front and rear dams, forming an intake channel (7). The inner side of each side filter dam is equipped with… There is a settlement wall (8), and a gap is provided between the settlement wall and the side filter dam body, which forms a buffer zone (9); the settlement wall includes a wall body (10), and a buffer settlement channel (11) is provided in the wall body. The buffer settlement channel has an inlet channel (12) and an outlet channel (13) on both sides. The inlet channel and the outlet channel are respectively connected to the buffer settlement channel. The inlet channel and the outlet channel are symmetrically inclined, with the inlet channel inclined towards the inlet channel side and the outlet channel inclined towards the outlet channel side.

2. The filter dam for treating marine aquaculture tailwater according to claim 1, characterized in that, The bottom of the buffer settling channel is provided with a second sludge collection tank (14), and the second sludge collection tank is connected to a second sewage pipe (15).

3. A filter dam for treating marine aquaculture tailwater according to claim 1, characterized in that, The inner side of the wall is provided with a water baffle (16), and a water outlet (17) is provided between the lower end of the water baffle and the dam foundation. A gap is provided between the water baffle and the wall, and the gap forms a water inlet area (18).

4. A filter dam for treating marine aquaculture tailwater according to claim 3, characterized in that, The inner side of the baffle plate is provided with a mesh grid (19), and there is a gap between the mesh grid and the baffle plate, which forms a filtering area (20).

5. A filter dam for treating marine aquaculture tailwater according to claim 4, characterized in that, The dam foundation is provided with a first sewage collection trough (21) located below the water-retaining plate, and the first sewage collection trough is connected to a first sewage discharge pipe (22).

6. A filter dam for treating marine aquaculture tailwater according to claim 1, characterized in that, The side filter dam is composed of several filler modules, which consist of a gabion (23) and filler (24) inside the gabion.

7. A filter dam for treating marine aquaculture tailwater according to claim 6, characterized in that, The dam foundation is provided with a limiting groove (25), and the lower part of the filling module is placed in the limiting groove.

8. A filter dam for treating marine aquaculture tailwater according to claim 1, characterized in that, The front and rear dams are made of reinforced concrete.

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