Aquaculture tail water circulation treatment system

Abstract

The utility model relates to an aquaculture tail water circulation treatment system which comprises an aquaculture pond, the bottom wall of the aquaculture pond is in a V shape, a blow-off pipe is arranged at the lowest position of the bottom wall of the aquaculture pond, a plurality of suction inlets are formed in the blow-off pipe, a lifting pipe is arranged at one end of the blow-off pipe, a lifting pump is arranged on the lifting pipe, and the suction inlets are communicated with the lifting pump. The upper end of the lifting pipe is connected with a filtering mechanism, the filtering mechanism is connected with a biochemical treatment mechanism, the biochemical treatment mechanism is connected with an ecological treatment mechanism, the ecological treatment mechanism is located above the culture pond, and the ecological treatment mechanism is provided with a water falling opening. According to the utility model, while breeding tail water is led out, solid impurities such as feed residues, excrement and the like which are deposited to the bottom of the breeding pond and rich in nutrition can be dispatched simultaneously, so that the solid impurities are prevented from accumulating at the bottom of the breeding pond to breed harmful microorganisms.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment equipment, and in particular to a wastewater recycling system for aquaculture. Background Technology

[0002] Currently, approximately 5% to 10% of the feed fed into aquaculture ponds is not consumed by aquatic organisms. Of the feed consumed, a portion is excreted in feces. The organic matter, nitrogen, phosphorus, and other components in the feed and feces accumulate in the aquaculture water, providing conditions for the growth and reproduction of pathogenic bacteria and increasing the likelihood of disease in aquatic organisms. Excessive decomposition of organic matter consumes large amounts of oxygen, making ponds prone to hypoxia and water quality deterioration, directly impacting the growth of farmed organisms. Currently, aeration equipment is typically used to oxygenate the ponds to prevent eutrophication, but this does not prevent bacterial growth.

[0003] The invention patent application with application number CN202211362410.1 discloses a method and system for internal circulation of aquaculture wastewater. This system recycles wastewater after aerobic, anaerobic, and oxygenation treatments, reducing the content of nitrogen, phosphorus, and organic matter in the water. However, this system cannot promptly remove feed residue, feces, and other impurities deposited at the bottom of the aquaculture pond, and it cannot solve the problem of bacteria easily multiplying at the bottom of the pond. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an aquaculture wastewater recycling system that can purify wastewater, realize its recycling, and at the same time clean up sediment at the bottom of the pond in a timely manner to prevent bacterial growth.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: an aquaculture wastewater recycling treatment system, including an aquaculture pond, the bottom wall of which is V-shaped, a sewage pipe is provided at the lowest point of the bottom wall of the aquaculture pond, multiple suction ports are provided on the sewage pipe, a lift pipe is provided at one end of the sewage pipe, a lift pump is provided on the lift pipe, a filter mechanism is connected to the upper end of the lift pipe, a biochemical treatment mechanism is connected to the filter mechanism, an ecological treatment mechanism is connected to the biochemical treatment mechanism, the ecological treatment mechanism is located above the aquaculture pond, and the ecological treatment mechanism is provided with a drop outlet.

[0006] Furthermore, the filtration mechanism includes a filter tank, a filter layer is provided inside the filter tank, a sedimentation chamber is provided between the filter layer and the bottom wall of the filter tank, the upper end of the lifting pipe is connected to the bottom of the filter tank, and a drain outlet is provided at the top of the filter tank.

[0007] Furthermore, the sidewall of the sedimentation chamber is provided with an openable and closable sludge discharge port.

[0008] Furthermore, the biochemical treatment device includes a treatment pool set on the ground around the aquaculture pond, one end of the treatment pool is connected to a drain outlet, and the other end is provided with a drainage ditch extending to the aquaculture pond, and the treatment pool is filled with packing material.

[0009] Furthermore, the packing material is flexible packing material, and a suspension frame is provided on the top of the treatment tank, with the flexible packing material suspended from the suspension frame.

[0010] Furthermore, the ecological treatment mechanism includes a horizontally arranged planting trough, which is located on top of the aquaculture pond, with one end of the planting trough connected to a drainage trough and a drop outlet located at the other end of the planting trough; a planting bed is provided inside the planting trough, and plants are planted on the planting bed.

[0011] Furthermore, there are multiple drainage troughs and planting troughs, with each planting trough connected to a drainage trough.

[0012] Furthermore, the sidewall of the planting bed is provided with multiple water passages, and the planting bed is provided with a first particle layer, a second particle layer and a substrate layer from bottom to top. The particle size of the second particle layer is smaller than that of the first particle layer, and the plant is planted in the substrate layer.

[0013] The beneficial effects of this invention are as follows: While drawing out the aquaculture wastewater, this invention also simultaneously removes nutrient-rich solid impurities such as feed residue and feces that have settled to the bottom of the aquaculture pond, preventing the accumulation of solid impurities at the bottom of the pond and the growth of harmful microorganisms. After filtration, biochemical treatment, ecological treatment, and drop-aeration, the drawn-out aquaculture wastewater exhibits significantly reduced levels of pollutants such as nitrogen, phosphorus, and organic matter, thus ensuring the water quality of the aquaculture pond. Attached Figure Description

[0014] Figure 1 This is a top view of the present invention;

[0015] Figure 2 yes Figure 1 Schematic diagram of the cross section of AA;

[0016] Figure 3 yes Figure 1 Schematic diagram of the BB section;

[0017] Figure 4 yes Figure 1 Schematic diagram of the CC section;

[0018] Figure 5 yes Figure 4 An enlarged schematic diagram of section D in the middle;

[0019] Attached diagram labels: 1—Aquaculture pond; 2—Sewage pipe; 3—Suction inlet; 4—Lifting pipe; 5—Lifting pump; 6—Drop outlet; 7—Filter tank; 8—Filter layer; 9—Sedimentation chamber; 10—Drain outlet; 11—Sludge discharge outlet; 12—Treatment tank; 13—Drainage trough; 14—Packing material; 15—Suspension frame; 16—Planting trough; 17—Planting bed; 18—Plant; 19—Second granular layer; 20—Substrate layer; 21—Plant. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] This utility model relates to an aquaculture wastewater recycling treatment system, such as... Figures 1 to 5 As shown, the aquaculture pond 1 has a V-shaped bottom wall. A sewage pipe 2 is installed at the lowest point of the bottom wall of the aquaculture pond 1. Multiple suction ports 3 are installed on the sewage pipe 2. A lift pipe 4 is installed at one end of the sewage pipe 2. A lift pump 5 is installed on the lift pipe 4. A filter mechanism is connected to the upper end of the lift pipe 4. The filter mechanism is connected to a biochemical treatment mechanism. The biochemical treatment mechanism is connected to an ecological treatment mechanism. The ecological treatment mechanism is located above the aquaculture pond 1 and is equipped with a drop outlet 6.

[0022] Aquaculture pond 1 is used for aquaculture and can be a rectangular pool built on the ground. The bottom wall of aquaculture pond 1 is V-shaped, allowing feed sediment and aquatic waste to slide to the lowest point. After the lift pump 5 starts, the tailwater at the bottom of aquaculture pond 1, carrying solid impurities, enters the sewage pipe 2 through the suction inlet 3, and then flows into the filtration mechanism along the sewage pipe 2 and the lift pipe 4. After entering the filtration mechanism, the solid impurities are filtered out, and the clean water enters the biological treatment mechanism. Microorganisms in the biological treatment mechanism decompose pollutants such as nitrogen, phosphorus, and organic matter in the tailwater, reducing the pollutant content. After biological treatment, the tailwater enters the ecological treatment mechanism to further remove nutrients such as nitrogen and phosphorus, and finally falls from the ecological treatment mechanism into aquaculture pond 1 through the drop outlet 6, which increases the oxygen content in the water.

[0023] This invention not only performs biochemical treatment on the wastewater but also removes feed residue and aquatic excrement deposited at the bottom of the aquaculture pond 1, preventing the growth of harmful microorganisms due to the rich nutrients in these substances and thus improving the safety of aquaculture. Furthermore, by installing an ecological treatment mechanism above the aquaculture pond 1, the nutrients in the wastewater are further consumed, and the pond is partially shaded, creating a shaded area for fish to hide in. In addition, the ecological treatment mechanism does not occupy space outside the aquaculture pond 1, improving the space utilization rate of the pond 1.

[0024] In this invention, the filtration mechanism can employ various existing filtration devices. As a preferred embodiment, the filtration mechanism includes a filter tank 7, which is a tank with a sealed bottom and an open top, possessing a rectangular inner cavity. It can be a metal tank or a concrete tank. The filter tank 7 can be installed on the ground next to the aquaculture pond 1. A filter layer 8 is provided inside the filter tank 7, which filters solid impurities. Existing filter cartridges, filter screens, etc., can be used, preferably granular filter media such as river sand. A sedimentation chamber 9 is provided between the filter layer 8 and the bottom wall of the filter tank 7. The upper end of the lift pipe 4 is connected to the bottom of the filter tank 7, and a drain outlet 10 is provided at the top of the filter tank 7. The wastewater from the aquaculture pond 1 is transported to the sedimentation chamber 9 through the lift pipe 4. Under the action of the filter layer 8, solid impurities remain in the sedimentation chamber 9 and settle at the bottom, while the clean water flows upward to the drain outlet 10 and is discharged from the drain outlet 10.

[0025] To facilitate the periodic cleaning of solid impurities in the sedimentation chamber 9, the side wall of the sedimentation chamber 9 is provided with an openable and closable sludge discharge port 11. A detachable sludge discharge door can be installed inside the sludge discharge port 11. The sludge discharge door can be connected to the side wall of the sedimentation chamber 9 by screws. When it is necessary to clean solid impurities, the lifting pump 5 stops running, the sludge discharge door is opened, and the water in the filter tank 7 is discharged through the sludge discharge port 11. Then, the cleaning tool is inserted into the sedimentation chamber 9 through the sludge discharge port 11 to clean away the sludge.

[0026] The biochemical treatment facility can utilize existing technology. Preferably, the biochemical treatment facility includes a treatment pool 12 set on the ground surrounding the aquaculture pond 1. The treatment pool 12 is arranged around the aquaculture pond 1 and can be linear, L-shaped, or U-shaped. The treatment pool 12 can be a metal pool or a concrete pool. An installation trench of a certain depth is excavated on the ground around the aquaculture pond 1, and the treatment pool 12 is installed in the installation trench, with the top of the treatment pool 12 higher than the ground. One end of the treatment pool 12 is connected to the drain outlet 10, and the other end is provided with a drainage trough 13 extending to the aquaculture pond 1. The treatment pool 12 is filled with packing material 14. The height of the drain outlet 10 is higher than that of the treatment pool 12. A pipe or water trough can be set at the drain outlet 10, and the clear water at the top of the filter tank 7 falls into the treatment pool 12 through the pipe or water trough. The packing material 14 provides a place for the growth of microorganisms, ensuring the treatment effect of the effluent. The drainage trough 13 is used to discharge the water in the treatment pool 12 into the ecological treatment facility, and a metal trough or plastic trough with a U-shaped cross-section can be used.

[0027] The packing material 14 can adopt existing technology, such as suspended packing material. In order to facilitate installation and later maintenance, the packing material 14 of this utility model is flexible packing material, such as braided tape packing material. The top of the treatment tank 12 is provided with a suspension frame 15, and the flexible packing material is suspended on the suspension frame 15. It is easy to install and can be quickly removed for later replacement and maintenance.

[0028] The ecological treatment system primarily utilizes plants 18 to absorb nutrients from the water. Specifically, the system includes a horizontally positioned planting trough 16, which can be a metal trough with a U-shaped cross-section. The planting trough 16 is positioned at the top of the aquaculture pond 1, with both ends fixed to the side walls of the pond. One end of the planting trough 16 is connected to a drainage trough 13, and a cascade 6 is located at the other end. A planting bed 17 is installed within the planting trough 16, on which plants 18 are planted. The planting trough 16 is located below the drainage trough 13, allowing water from the drainage trough 13 to flow into it. After entering the planting trough 16, the water flows towards the cascade 6. As it flows through the planting bed 17, the roots of the plants 18 absorb nutrients from the water, further purifying the wastewater and reducing its nutrient content. The water in the planting trough 16 then flows into the aquaculture pond 1 through the cascade 6, thus achieving water circulation. The planting trough 16 is located above the aquaculture water body. During the water drop, it can fully contact the air and increase the dissolved oxygen content.

[0029] There are multiple drainage troughs 13 and planting troughs 16, with each planting trough 16 connected to one drainage trough 13. Using multiple planting troughs 16 to disperse the water flow can reduce the water flow velocity in each planting trough 16 and improve the water purification effect of the plants 18.

[0030] The planting bed 17 has multiple water passage holes on its sidewalls. The planting bed 17 is rectangular with an inner cavity, allowing water from the planting trough 16 to enter and exit through these holes. Inside the planting bed 17, from bottom to top, are arranged a first granular layer 21, a second granular layer 19, and a substrate layer 20. The particle size of the second granular layer 19 is smaller than that of the first granular layer 21. The plant 18 is planted in the substrate layer 20. The first granular layer 21 can be a pebble layer, the second granular layer 19 can be a ceramic granule layer, and the substrate layer 20 can be any existing nutrient soil. The substrate layer 20 provides nutrients to the plant 18. The second granular layer 19 and the first granular layer 21 support the substrate layer 20, preventing it from being directly immersed in water and causing rapid nutrient loss. There are gaps between the second granular layer 19 and the first granular layer 21. After water enters the planting bed 17, it resides inside the first granular layer 21, allowing the roots of the plant 18 to extend into it, thus purifying the water. Plant 18 can be common aquatic and wetland plants such as cattail, sweet flag, and water onion.

[0031] In this invention, only one booster pump 5 is needed, resulting in low operating costs and good treatment effect on tailwater. The entire treatment process is ecological and environmentally friendly, which is conducive to the healthy growth of aquatic products.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An aquaculture wastewater recycling system, comprising an aquaculture pond (1), characterized in that: The bottom wall of the aquaculture pond (1) is V-shaped. A sewage pipe (2) is provided at the lowest point of the bottom wall of the aquaculture pond (1). Multiple suction ports (3) are provided on the sewage pipe (2). A lifting pipe (4) is provided at one end of the sewage pipe (2). A lifting pump (5) is provided on the lifting pipe (4). A filter mechanism is connected to the upper end of the lifting pipe (4). A biochemical treatment mechanism is connected to the filter mechanism. An ecological treatment mechanism is connected to the biochemical treatment mechanism. The ecological treatment mechanism is located above the aquaculture pond (1) and is equipped with a drop outlet (6).

2. The aquaculture wastewater recycling system as described in claim 1, characterized in that: The filtration mechanism includes a filter tank (7), a filter layer (8) is provided in the filter tank (7), a sedimentation chamber (9) is provided between the filter layer (8) and the bottom wall of the filter tank (7), the upper end of the lifting pipe (4) is connected to the bottom of the filter tank (7), and a drain outlet (10) is provided at the top of the filter tank (7).

3. The aquaculture wastewater recycling system as described in claim 2, characterized in that: The sedimentation chamber (9) is provided with an openable and closable sludge discharge port (11) on its side wall.

4. The aquaculture wastewater recycling system as described in claim 2, characterized in that: The biochemical treatment apparatus includes a treatment pool (12) set on the ground around the breeding pond (1). One end of the treatment pool (12) is connected to the drain outlet (10), and the other end is provided with a drainage ditch (13) extending to the breeding pond (1). The treatment pool (12) is filled with packing material (14).

5. The aquaculture wastewater recycling system as described in claim 4, characterized in that: The packing material (14) is a flexible packing material, and a suspension frame (15) is provided on the top of the treatment tank (12), and the flexible packing material is suspended on the suspension frame (15).

6. The aquaculture wastewater recycling system as described in claim 4, characterized in that: The ecological treatment mechanism includes a horizontally arranged planting trough (16), which is set on the top of the aquaculture pond (1), and one end of the planting trough (16) is connected to the drainage trough (13), and the drop outlet (6) is set at the other end of the planting trough (16); a planting bed (17) is set in the planting trough (16), and plants (18) are planted on the planting bed (17).

7. The aquaculture wastewater recycling system as described in claim 6, characterized in that: There are multiple drainage troughs (13) and planting troughs (16), with each planting trough (16) connected to a drainage trough (13).

8. The aquaculture wastewater recycling system as described in claim 6, characterized in that: The planting bed (17) has multiple water passage holes on its side wall. The planting bed (17) is provided with a first particle layer (21), a second particle layer (19) and a substrate layer (20) from bottom to top. The particle size of the second particle layer (19) is smaller than that of the first particle layer (21). The plant (18) is planted in the substrate layer (20).

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