An ecological treatment method for the tail water of special aquaculture

Abstract

The present invention discloses an ecological treatment method for the tail water of special aquaculture, specifically including: S1, sedimentation; S2, filtration; S3, aeration; S4, filtration; S5, purification; S6, discharge. The sediment on the water retaining dam is collected and reused through a collection device. The present invention can effectively conduct ecological treatment on the aquaculture tail water and collect the sediment passing through the water retaining dam.

Description

Technical Field

[0001] The present invention relates to the field of aquaculture tail water treatment, and particularly to an ecological treatment method for the tail water of special aquaculture. Background Art

[0002] As is well known, the factory-style high-density aquaculture method is emerging in China. Its advantages are less land occupation, water conservation, energy saving, and high yield. Its disadvantages are that a large amount of residual bait and feces are discharged into the water body due to high-density aquaculture, and the aquaculture tail water pollution is relatively serious. If the aquaculture tail water is not treated in time and effectively, it will not only lead to explosive diseases of fish, shrimps, shellfish, etc., and even large-scale deaths, resulting in a decline in the quality and yield of aquaculture products, but also deteriorate the aquaculture water environment, cause damage to the ecological environment, and threaten human health. Therefore, in order to achieve the overall development goal of "improving quality and efficiency, reducing production and increasing income, green development, and enriching fishermen", green ecological aquaculture tail water treatment is required. An ecological system is set up to treat the aquaculture tail water. When treating, a water retaining dam needs to be built to discharge the aquaculture tail water of each treatment pond. When the aquaculture tail water passes through the water retaining dam, the sediment in the aquaculture tail water will be deposited above the water retaining dam. If these sediments are collected, they can be used as fertilizers. However, the existing water retaining dam does not have the function of collecting sediments, and when the water retaining dam is dry, it will cause the sediments to dry on the water retaining dam, resulting in peculiar smells. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide an ecological treatment method for the tail water of special aquaculture.

[0004] In order to achieve the above invention purpose, the present invention adopts the following technical solutions:

[0005] An ecological treatment method for the tail water of special aquaculture specifically includes:

[0006] S1. Sedimentation: The aquaculture tail water is sedimented by setting a sedimentation pond. Filter-feeding aquatic animals and omnivorous fish are stocked in the sedimentation pond. The filter-feeding aquatic animals include snails, mussels, and crabs, and the omnivorous fish include loaches, carps, and crucian carps.

[0007] S2. Filtration: The aquaculture tail water treated by the sedimentation pond is treated by setting a first filter dam. The first filter dam is a sand-free concrete dam, and zeolite is filled in the concrete dam.

[0008] S3. Aeration: The aquaculture tail water treated by the first filter dam is treated by setting an aeration pond.

[0009] S4. Filtration: The treated aquaculture tail water from the aeration tank is treated by setting up a second filtration dam. The second filtration dam has the same structure as the first filtration dam. Gravel is filled in the second filtration dam, and the treated aquaculture tail water from the aeration tank is filtered by the gravel.

[0010] S5. Purification: The treated aquaculture tail water from the second filtration dam is treated by setting up a microbial purification pond and an aquatic organism purification pond.

[0011] S6. Discharge: The purified aquaculture tail water is directly discharged.

[0012] Preferably, the sedimentation tank is in the shape of a rectangular trench. Four water retaining dams are arranged at the bottom of the trench. The bottom of the trench is divided into four sunken water areas by the four water retaining dams. Tail water treatment devices are provided on the water retaining dams arranged on the sedimentation tank. The tail water treatment devices are used to treat and collect the water passing over the water retaining dams.

[0013] Preferably, the tail water treatment device is composed of a transmission device and a collection device. A downwardly concave installation groove is provided at the top of the water retaining dam body. A collection device for collecting sediments in the aquaculture tail water is provided in the installation groove. A mounting plate is correspondingly provided on the side surface of the water retaining dam body. A transmission device for driving the collection device to work is provided on the mounting plate.

[0014] Preferably, the collection device is composed of a transmission belt, a second transmission shaft, a third transmission shaft, a scraper and a collection tank. The third transmission shaft and the second transmission shaft are provided on the inner wall of the installation groove. Transmission rollers are provided on both the third transmission shaft and the second transmission shaft. The transmission rollers and the third transmission shaft and the second transmission shaft have the same central axis and are fixedly connected. The transmission belt is fitted on the transmission rollers. The two ends of the second transmission shaft extend outwards through the inner wall of the installation groove. The second transmission shaft is connected to the transmission device. A downwardly concave collection tank is provided at the bottom of the installation groove. The collection tank is located below the transmission belt. A scraper is provided in the collection tank. The bottom surface of the scraper is in contact with the transmission belt.

[0015] Preferably, a clamping groove is provided on the side surface of the water retaining dam body. A pull plate is movably connected in the clamping groove. The pull plate is located inside the collection tank. A limiting plate is provided at the end of the pull plate. The limiting block is used to seal the clamping groove. An opening is provided on the pull plate penetrating from the top.

[0016] Preferably, the transmission device is composed of a first transmission shaft, a first gear, a second gear, a rotating roller, blades and a transmission chain. A rotating hole is correspondingly provided on the mounting plate, and the first transmission shaft rotatably connected is fitted in the rotating hole. The first transmission shaft penetrates through the mounting plate and extends to both sides. A first gear is provided on the first transmission shaft, a second gear is provided on the second transmission shaft, and a transmission chain engaged with each other is fitted on the first gear and the second gear. A rotating roller is provided on the first transmission shaft. The rotating roller and the first transmission shaft have the same central axis, and equidistantly distributed blades are provided on the rotating roller. The blades are distributed along the central axis of the rotating roller.

[0017] Preferably, a baffle is provided on the water retaining dam body. The baffle is in an inverted "L" shape and is located above the transmission belt. The baffle and the water retaining dam body are of an integral structure.

[0018] Preferably, a connecting pipe is buried at the bottom of the aeration tank. A plurality of air outlet holes are provided on the connecting pipe. The connecting pipe is connected to an external oxygenator, and then the aquaculture tail water in the aeration tank is aerated to increase the dissolved oxygen content in the water body.

[0019] Preferably, the aquatic plant purification pond is divided into 4 sections of aquatic plant purification sub-areas by setting 3 water retaining dams, and sediment is laid in each aquatic plant purification sub-area. Aquatic plants planted in the aquatic plant purification pond are divided into floating plants and submerged plants. The floating plants include duckweed and water hyacinth, and the submerged plants include Vallisneria natans, Vallisneria spinulosa, Ceratophyllum demersum and Hydrilla verticillata. A certain area of emergent plants is planted in the shallow water area of the aquatic plant purification pond. The emergent plants include Acorus tatarinowii and Cyperus alternifolius.

[0020] Preferably, the microbial purification pond is located inside the first aquatic plant purification sub-area separated by a water retaining dam in the aquatic plant purification pond. By regularly spraying a microbial purifier into the microbial purification pond, microorganisms are used to decompose the eutrophic substances in the water body, thereby purifying the pond water.

[0021] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0022] By setting a sedimentation tank, a first filter dam, an aeration tank, a second filter dam, an aquatic plant purification pond, a microbial purification pond and a water retaining dam to treat the aquaculture tail water, by setting a treatment device to treat the sediment passing through the water retaining dam, by setting a transmission device to drive the collection device to work, and by the collection device to collect and reuse the sediment on the water retaining dam, the present invention can effectively carry out ecological treatment on the aquaculture tail water and collect the sediment passing through the water retaining dam. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1Schematic diagram of the process flow for treating aquaculture tail water of the present invention;

[0024] Figure 2 Schematic diagram of the structures of the first filter dam and the second filter dam of the present invention;

[0025] Figure 3 Structural diagram of the treatment device of the present invention;

[0026] Figure 4 Cross-sectional view of the treatment device of the present invention;

[0027] Figure 5 Schematic diagram of the structure of the pull plate of the present invention;

[0028] 1. Water retaining dam body; 2. First transmission shaft; 3. Second transmission shaft; 4. First gear; 5. Second gear; 6. Transmission chain; 7. Rotating roller; 8. Blade; 9. Transmission belt; 10. Baffle; 11. Limiting plate; 12. Third transmission shaft; 13. Transmission roller; 14. Scraper; 15. Collection tank; 16. Pull plate; 17. Mounting plate; 20. Sedimentation tank; 21. Aeration tank; 22. Aquatic plant purification tank; 23. First filter dam; 24. Filling tank; 25. Second filter dam. Detailed implementation manners

[0029] The present invention can be explained in detail through the following embodiments, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0030] Combined with the attached Figures 1 - 5 , the ecological treatment method for the tail water of a special aquaculture specifically includes

[0031] S1. Sedimentation: The aquaculture tail water is sedimented through the setting of the sedimentation tank 20. Filter-feeding aquatic animals and omnivorous fish are stocked in the sedimentation tank 20. The filter-feeding aquatic animals include snails, mussels and crabs, and the omnivorous fish include loaches, carps and crucian carps;

[0032] S2. Filtration: The aquaculture tail water treated by the sedimentation tank 20 is treated through the setting of the first filter dam. The first filter dam is a sandless concrete dam, and zeolite is filled in the concrete dam;

[0033] S3. Aeration: The aquaculture tail water treated by the first filter dam is treated through the setting of the aeration tank 21;

[0034] S4. Filtration: The aquaculture tail water treated by the aeration tank 21 is treated through the setting of the second filter dam. The second filter dam has the same structure as the first filter dam, and gravel is filled in the second filter dam. The aquaculture tail water treated by the aeration tank 21 is filtered through the gravel;

[0035] The first filter dam and the second filter dam have the same structure, and both the first filter dam and the second filter dam are provided with filling grooves 24, and the filling grooves 24 are filled with gravel and zeolite respectively.

[0036] S5. Purification: The aquaculture tail water treated by the second filter dam is treated by setting up a microbial purification pond and an aquatic plant purification pond;

[0037] S6. Discharge: The purified aquaculture tail water is directly discharged.

[0038] The sedimentation tank 20 is in the shape of a rectangular trench. Four water retaining dams are arranged at the bottom of the trench. The bottom of the trench is divided into four submerged areas by the four water retaining dams. The water retaining dams arranged on the sedimentation tank 20 are all provided with tail water treatment devices, and the tail water treatment devices are used for treating and collecting the water passing over the water retaining dams.

[0039] The tail water treatment device is composed of a transmission device and a collection device. The top of the water retaining dam body 1 is provided with a downwardly concave installation groove. The installation groove is provided with a collection device for collecting the sediment in the aquaculture tail water. The side surface of the water retaining dam body 1 is correspondingly provided with a mounting plate, and the mounting plate is provided with a transmission device for driving the collection device to work; the water on the water retaining dam body transmits power to the transmission device, so as to drive the collection device to work.

[0040] The collection device is composed of a transmission belt 9, a second transmission shaft 3, a third transmission shaft 12, a scraper 14 and a collection tank 15. The inner wall of the installation groove is provided with a third transmission shaft 12 and a second transmission shaft 3. The third transmission shaft 12 and the second transmission shaft 3 are both provided with transmission rollers 13. The transmission rollers 13 and the third transmission shaft 12 and the second transmission shaft 3 are on the same central axis and are fixedly connected. The transmission rollers 13 are equipped with a transmission belt 9. The two ends of the second transmission shaft 3 penetrate through the inner wall of the installation groove and extend outwards. The second transmission shaft 3 is connected with the transmission device. The bottom of the installation groove is provided with a downwardly concave collection tank 15. The collection tank 15 is located below the transmission belt 9, and the collection tank is close to the lower part directly below the end of the transmission belt 9. The water flowing down from the transmission belt will not fall into the collection tank 15 due to inertia. The collection tank 15 is provided with a scraper 14, and the bottom surface of the scraper 14 touches the transmission belt 9; the scraper is used for scraping the substances deposited on the transmission belt, and these substances can usually be used as waste after being collected.

[0041] The side surface of the water retaining dam body 1 is provided with a card slot, and the card slot is provided with a pull plate 16 connected movably. The pull plate 16 is located inside the collection tank 15. The end of the pull plate 16 is provided with a limiting plate 11. The limiting block is used for sealing the card slot. The pull plate 16 is provided with a slot penetrating from the top.

[0042] The transmission device is composed of a first transmission shaft 2, a first gear 4, a second gear 5, a rotating roller 7, blades 8 and a transmission chain 6. A rotating hole is correspondingly provided on the mounting plate, and the first transmission shaft 2 is rotatably connected in the rotating hole. The first transmission shaft 2 penetrates through the mounting plate and extends to both sides. A first gear 4 is provided on the first transmission shaft 2. A second gear 5 is provided on the second transmission shaft 3. A transmission chain 6 that meshes with each other is installed on the first gear 4 and the second gear 5. A rotating roller 7 is provided on the first transmission shaft 2. The rotating roller 7 and the first transmission shaft 2 have the same central axis, and equidistantly distributed blades 8 are provided on the rotating roller 7. The blades 8 are distributed along the central axis of the rotating roller 7. When the aquaculture tail water impacts the blades, the rotating roller can be rotated.

[0043] A baffle 10 is provided on the water retaining dam body 1. The baffle 10 is in an inverted "L" shape and is located above the conveyor belt 9. The baffle 10 and the water retaining dam body 1 are of an integral structure. The baffle 10 is mainly used to enable the aquaculture tail water to flow through the conveyor belt to the upper part of the blades, so that the sediment in the aquaculture tail water precipitates on the conveyor belt, and the water can fall on the blades 8, thereby driving the rotating roller 7 to rotate by the blades 8.

[0044] A connecting pipe is buried at the bottom of the aeration tank 21. A plurality of air outlet holes are provided on the connecting pipe. The connecting pipe is connected to an external oxygenator, and then the aquaculture tail water in the aeration tank 21 is aerated with oxygen to increase the oxygen content in the water body.

[0045] By setting 3 water retaining dams, the aquatic plant purification pond 22 is divided into 4 sections of aquatic plant purification sub-areas, and sediment is laid in each aquatic plant purification sub-area. Aquatic plants are planted in the aquatic plant purification pond 22, including floating plants and submerged plants. The floating plants include duckweed and water hyacinth. The submerged plants include Vallisneria natans, Egeria densa, Ceratophyllum demersum and Hydrilla verticillata. A certain area of emergent plants is planted in the shallow water area of the aquatic plant purification pond 22. The emergent plants include Acorus tatarinowii and Cyperus alternifolius.

[0046] The microbial purification pond is located inside the first aquatic plant purification sub-area separated by a water retaining dam in the aquatic plant purification pond 22. By regularly spraying a microbial purifying agent into the microbial purification pond, microorganisms are used to decompose the eutrophic substances in the water body, thereby purifying the pond water.

[0047] Water retaining dams are provided in both the sedimentation pond 20 and the aquatic plant pond. Only the water retaining dam in the sedimentation pond 20 is provided with a treatment device. The heights of the sedimentation pond 20, the aeration tank 21 and the aquatic plant purification pond 22 decrease from high to low.

[0048] Example 1, the usage method of the tail water treatment device described in the present invention is as follows: the flowing water through the water retaining dam body 1 drives the transmission device to work. When the aquaculture tail water passes through the conveyor belt 9, the sediment in the aquaculture tail water will fall on the conveyor belt 9, and the water will continue to flow along the conveyor belt 9 to the blades 8. The blades 8 will drive the rotating roller 7 to rotate, and the rotating roller 7 drives the first transmission shaft 2 to rotate. The first transmission shaft 2 drives the second rotating shaft to rotate through the first gear 4 and the transmission chain 6. When the second rotating shaft rotates, the transmission roller 13 will rotate synchronously. When the transmission roller 13 drives, it will drive the conveyor belt 9 to rotate. When the conveyor belt 9 rotates, the sediment adsorbed on the surface of the conveyor belt 9 will move along with the conveyor belt 9. The scraper 14 will scrape off the sediment carried on the surface of the conveyor belt 9. Since the scraper 14 is below the conveyor belt 9, the aquaculture tail water will not flow into the collection tank 15, and the sediment carried on the conveyor belt 9 will fall into the collection tank 15 after being scraped by the scraper 14. By regularly pulling the limiting plate 11, the sediment collected in the collection tank 15 can be taken out. These sediments can usually be used as fertilizers continuously.

[0049] The parts not detailed in the present invention are prior arts. Although the present invention is specifically shown and introduced in combination with the preferred implementation embodiments, there are many methods and ways to specifically implement this technical solution. The above description is only the preferred implementation manner of the present invention. However, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.

Claims

1. An ecological treatment method for the tail water of special aquaculture, characterized in that: S1. Precipitation: The aquaculture tail water is subjected to precipitation treatment by setting a sedimentation tank. Filter-feeding aquatic animals and omnivorous fish are stocked in the sedimentation tank. The filter-feeding aquatic animals include snails, mussels and crabs, and the omnivorous fish include loaches, carps and crucian carps; S2. Filtration: The aquaculture tail water treated by the sedimentation tank is treated by setting a first filter dam. The first filter dam is a sandless concrete dam, and zeolite is filled in the concrete dam; S3. Aeration: The aquaculture tail water treated by the first filter dam is treated by setting an aeration tank; S4. Filtration: The aquaculture tail water treated by the aeration tank is treated by setting a second filter dam. The second filter dam has the same structure as the first filter dam, and gravel is filled in the second filter dam. The aquaculture tail water treated by the aeration tank is filtered by the gravel; S5. Purification: The aquaculture tail water treated by the second filter dam is treated by setting a microbial purification tank and an aquatic organism purification tank; S6. Discharge: The purified aquaculture tail water is directly discharged; The sedimentation tank is in the shape of a rectangular trench pool. 4 water retaining dams are arranged at the bottom of the trench pool. The bottom of the trench pool is divided into 4 sunken water areas by the 4 water retaining dams. Tail water treatment devices are arranged on the water retaining dams set on the sedimentation tank. The tail water treatment device is used for treating and collecting the water passing over the water retaining dam; The tail water treatment device is composed of a transmission device and a collection device. A downward concave installation groove is arranged at the top of the water retaining dam body (1). A collection device for collecting the sediment in the aquaculture tail water is arranged in the installation groove. A mounting plate is correspondingly arranged on the side surface of the water retaining dam body (1). A transmission device for driving the collection device to work is arranged on the mounting plate; The collection device is composed of a transmission belt (9), a second transmission shaft (3), a third transmission shaft (12), a scraper (14) and a collection tank (15). A third transmission shaft (12) and a second transmission shaft (3) are arranged on the inner wall of the installation groove. Transmission rollers (13) are arranged on both the third transmission shaft (12) and the second transmission shaft (3). The transmission rollers (13) and the third transmission shaft (12) and the second transmission shaft (3) are on the same central axis and are fixedly connected. A transmission belt (9) is equipped on the transmission rollers (13). The two ends of the second transmission shaft (3) extend outwards through the inner wall of the installation groove. The second transmission shaft (3) is connected with the transmission device. A downward concave collection tank (15) is arranged at the bottom of the installation groove. The collection tank (15) is located below the transmission belt (9). A scraper (14) is arranged in the collection tank (15). The bottom surface of the scraper (14) is in contact with the transmission belt (9); A clamping groove is arranged on the side surface of the water retaining dam body (1). A pull plate (16) is movably connected in the clamping groove. The pull plate (16) is located inside the collection tank (15). A limiting plate (11) is arranged at the end of the pull plate (16). The limiting plate is used for sealing the clamping groove. An opening is arranged on the pull plate (16) penetrating from the top; The transmission device is composed of a first transmission shaft (2), a first gear (4), a second gear (5), a rotating roller (7), blades (8) and a transmission chain (6). A rotating hole is correspondingly provided on the mounting plate, and the first transmission shaft (2) rotatably connected is installed in the rotating hole. The first transmission shaft (2) penetrates through the mounting plate and extends to both sides. A first gear (4) is provided on the first transmission shaft (2). A second gear (5) is provided on the second transmission shaft (3). A transmission chain (6) engaged with each other is installed on the first gear (4) and the second gear (5). A rotating roller (7) is provided on the first transmission shaft (2). The rotating roller (7) and the first transmission shaft (2) have the same central axis, and equidistantly distributed blades (8) are provided on the rotating roller (7). The blades (8) are distributed along the central axis of the rotating roller (7).

2. The ecological treatment method for the tail water of special aquaculture according to claim 1, characterized in that: A baffle (10) is provided on the water retaining dam body (1). The baffle (10) is of an inverted "L" shape and is located above the transmission belt (9). The baffle (10) and the water retaining dam body (1) are of an integral structure.

3. The ecological treatment method for the tail water of special aquaculture according to claim 1, characterized in that: A connecting pipe is buried at the bottom of the aeration tank. A plurality of air holes are provided on the connecting pipe. The connecting pipe is connected to an external oxygenator, and then the aquaculture tail water in the aeration tank is oxygenated and aerated to increase the oxygen content in the water body.

4. The ecological treatment method for the tail water of special aquaculture according to claim 1, characterized in that: By arranging 3 water retaining dams, the aquatic plant purification pond is divided into 4 sections of aquatic plant purification plots, and sediment is laid in each aquatic plant purification plot. Aquatic plants planted in the aquatic plant purification pond are divided into floating plants and submerged plants. The floating plants include duckweed and water hyacinth. The submerged plants include Vallisneria natans, Vallisneria spinulosa, Ceratophyllum demersum and Hydrilla verticillata. A certain area of emergent plants is planted in the shallow water area of the aquatic plant purification pond. The emergent plants include Acorus tatarinowii and Cyperus alternifolius.

5. The ecological treatment method for the tail water of special aquaculture according to claim 4, characterized in that: The microbial purification pond is located inside the first aquatic plant purification plot separated by a water retaining dam in the aquatic plant purification pond. By regularly spraying a microbial purifying agent into the microbial purification pond, microorganisms are used to decompose the eutrophic substances in the water body, thereby purifying the pond water.

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