Four-pond three-dam type ecological system for aquaculture tail water treatment

Abstract

The utility model discloses a four-pond three-dam type ecological system for aquaculture tail water treatment, which comprises a settling pond, an aeration pond, a biological purification pond and a clean water pond, and an ecological filter dam is arranged between two adjacent ponds. The four-pond three-dam type ecological system adopts a four-pond three-dam structure, and is additionally provided with the biological purification pond and the ecological filter dam; the treatment efficiency of nitrogen and phosphorus in the culture tail water is improved by utilizing a microporous structure of the carbon fiber ecological grass and a biological membrane formed on the carbon fiber ecological grass, and the treatment efficiency of total suspended solids, chemical oxygen demand and total nitrogen in the culture tail water is accelerated; according to the utility model, the flow path of the culture tail water in the sedimentation tank is S-shaped by utilizing the flow guide baffle, so that the flow path and the residence time of the culture tail water in the sedimentation tank are increased, and the sedimentation efficiency of suspended matters in the culture tail water is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aquaculture tail water treatment, and particularly relates to a four-pond three-dam type ecological system for aquaculture tail water treatment, which is applicable to the purification of aquaculture tail water. Background Art

[0002] Pond aquaculture is an economic activity that uses natural or artificially excavated ponds for aquaculture. A large amount of feed fed during aquaculture will cause eutrophication of the aquaculture water body. Periodic water replacement during the aquaculture production process will cause the eutrophic tail water to enter the surrounding water bodies, resulting in water pollution. At present, aquaculture tends to be centralized and large-scale production, and the amount of eutrophic aquaculture tail water that needs to be treated is increasing; there are already a variety of mature ecological treatment modes being applied. Among them, the "three-pond two-dam" multi-stage combined process has good treatment effects, but its treatment efficiency for TSS (total suspended solids), COD Mn (chemical oxygen demand), and TN (total nitrogen) is relatively low. If the requirements for the effluent water quality are relatively high, its process needs to be further improved to improve its purification rate of water quality indicators. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a four-pond three-dam type ecological treatment system for aquaculture tail water treatment in view of the above problems existing in the prior art.

[0004] The above purpose of the utility model is achieved by the following technical means:

[0005] A four-pond three-dam type ecological system for aquaculture tail water treatment includes a sedimentation tank, an aeration tank, a biological purification tank, and a cleaning tank. An inlet is provided on the sedimentation tank. An ecological filter dam is provided between the sedimentation tank and the aeration tank, between the aeration tank and the biological purification tank, and between the biological purification tank and the cleaning tank, which are the first ecological filter dam, the second ecological filter dam, and the third ecological filter dam respectively. An outlet is provided on the cleaning tank. A plurality of flow guiding baffles are provided in the sedimentation tank. An aeration system is arranged at the bottom of the aeration tank. Carbon fiber ecological grass is provided in the biological purification tank. Submerged plants are planted in the cleaning tank. A plurality of aeration devices are evenly arranged in the cleaning tank.

[0006] As described above, the flow guiding baffles are arranged between two side walls of the sedimentation tank adjacent to the first ecological filter dam. There are two flow guiding baffles in the sedimentation tank. An overflow channel is left between one flow guiding baffle and one side wall of the sedimentation tank adjacent to the first ecological filter dam, and an overflow channel is left between the other flow guiding baffle and the other side wall of the sedimentation tank adjacent to the first ecological filter dam. The lengths of the flow guiding baffles are all greater than half of the distance between the two side walls of the sedimentation tank adjacent to the first ecological filter dam and less than the distance between the two side walls of the sedimentation tank adjacent to the first ecological filter dam. The bottom of the flow guiding baffle is fixedly connected to the bottom of the sedimentation tank.

[0007] As described above, the diversion baffle includes a flexible waterproof diaphragm plate and a plurality of support pipes. The support pipes are fixedly connected to the bottom of the sedimentation tank. The bottom of the waterproof diaphragm plate is fixedly connected to the lower part of the support pipes. A floating water ball is movably sleeved on each support pipe, and the floating water balls are all connected to the top of the waterproof diaphragm plate.

[0008] The ecological filtration dam includes a water retaining dam and a filtration dam. The filtration dam is arranged on the top of the water retaining dam. The outer wall of the filtration dam is built with hollow bricks, and the outer wall of the filtration dam is filled with filter materials.

[0009] As described above, the aeration system includes a plurality of nano-aeration discs. The plurality of nano-aeration discs are evenly arranged between two side walls of the aeration tank adjacent to the first ecological filtration dam. The nano-aeration discs are fixedly connected to the bottom of the aeration tank.

[0010] A plurality of fixed brackets and multiple rows of carbon fiber ecological grasses are arranged between two side walls of the biological purification tank adjacent to the second ecological filtration dam. The bottom of the fixed brackets is fixedly connected to the bottom of the biological purification tank, and a row of carbon fiber ecological grasses is fixedly hung on each fixed bracket.

[0011] The utility model has the following beneficial effects compared with the prior art:

[0012] (1). The utility model adopts the structure of four ponds and three dams, and adds a biological purification tank. The carbon fiber ecological grasses in the biological purification tank are processed with biocompatible materials and woven into the shape of natural waterweeds. The surface structure of the carbon fiber ecological grasses is used to attach microorganisms and form an adhesive active biofilm on the surface to form a biological film. In the cross-section of the biological film, an aerobic zone and an anaerobic zone are formed from the outside to the inside. The ammonia nitrogen is reduced by the proliferation of aerobic microorganisms in the aerobic zone, and biological denitrification is carried out by the proliferation of anaerobic microorganisms in the anaerobic zone. The microporous structure of the carbon fiber ecological grasses has a large adsorption capacity and a fast adsorption efficiency for organic matters and heavy metal ions in the aqueous solution, directly adsorbs and displaces nitrogen and phosphorus in the water body, firmly fixes the nitrogen and phosphorus pollutants in the material, and finally is converted into biomass that is difficult to precipitate through biological reactions and natural sedimentation, which is beneficial to the restoration of polluted water bodies, can quickly purify the water body, reduce the concentration of ammonia nitrogen pollutants in the water body, improve the transparency of the water body, and accelerate the treatment efficiency of total suspended solids, chemical oxygen demand and total nitrogen in the aquaculture tail water;

[0013] (2). The utility model is additionally provided with an ecological filtration dam between two adjacent ponds, and the purification ability is improved by the action of the filter materials and environmental microorganisms filled in the ecological filtration dam;

[0014] (3) The utility model makes the flow path of the aquaculture tail water in the sedimentation tank be S-shaped through the diversion baffle, increasing the flow process and residence time of the aquaculture tail water in the sedimentation tank and improving the sedimentation efficiency of suspended solids in the aquaculture tail water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic cross-sectional structure diagram of the utility model;

[0016] Figure 2 is a top view of the utility model;

[0017] Reference numerals and corresponding component names:

[0018] 1 - water inlet; 2 - sedimentation tank; 3 - first ecological filter dam; 4 - aeration tank; 5 - second ecological filter dam; 6 - biological purification tank; 7 - third ecological filter dam; 8 - cleaning tank; 9 - water outlet; 10 - diversion baffle; 11 - aeration system; 12 - carbon fiber ecological grass; 13 - submerged plants; 14 - aeration device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] For the convenience of those of ordinary skill in the art to understand and implement the utility model, the following further describes the utility model in detail with reference to the embodiments. The embodiments described herein are only used to illustrate and explain the utility model and are not intended to limit the utility model.

[0020] Embodiment 1:

[0021] A four-tank and three-dam type ecological system for treating aquaculture tail water includes a sedimentation tank 2, an aeration tank 4, a biological purification tank 6, and a cleaning tank 8. A water inlet 1 is provided on the sedimentation tank 2. Ecological filter dams are provided between the sedimentation tank 2 and the aeration tank 4, between the aeration tank 4 and the biological purification tank 6, and between the biological purification tank 6 and the cleaning tank 8, which are the first ecological filter dam 3, the second ecological filter dam 5, and the third ecological filter dam 7 respectively. The sedimentation tank 2 is communicated with the aeration tank 4 through the first ecological filter dam 3, the aeration tank 4 is communicated with the biological purification tank 6 through the second ecological filter dam 5, and the biological purification tank 6 is communicated with the cleaning tank 8 through the third ecological filter dam 7. A water outlet 9 is provided on the cleaning tank 8. A plurality of diversion baffles 10 are provided in the sedimentation tank 2 to increase the flow path and residence time of the aquaculture tail water in the sedimentation tank 2. An aeration system 11 is arranged at the bottom of the aeration tank 4. Carbon fiber ecological grass 12 is provided in the biological purification tank 6. Submerged plants 13 are planted in the cleaning tank 8. A plurality of aeration devices 14 are evenly arranged in the cleaning tank 8.

[0022] The flow guiding baffle 10 is arranged between two side walls of the sedimentation tank 2 adjacent to the first ecological filtration dam 3. There are two flow guiding baffles 10 in the sedimentation tank 2. An overflow channel is left between one of the flow guiding baffles 10 and one side wall of the sedimentation tank 2 adjacent to the first ecological filtration dam 3, and an overflow channel is left between the other flow guiding baffle 10 and the other side wall of the sedimentation tank 2 adjacent to the first ecological filtration dam 3. The lengths of the flow guiding baffles 10 are all greater than half of the distance between the two side walls of the sedimentation tank 2 adjacent to the first ecological filtration dam 3 and less than the distance between the two side walls of the sedimentation tank 2 adjacent to the first ecological filtration dam 3, so that the flow path of the aquaculture tail water in the sedimentation tank 2 is S-shaped, increasing the flow process and residence time of the aquaculture tail water in the sedimentation tank 2 and improving the sedimentation efficiency of the suspended matter in the aquaculture tail water. The bottom of the flow guiding baffle 10 is fixedly connected to the bottom of the sedimentation tank 2.

[0023] The flow guiding baffle 10 includes a flexible impermeable diaphragm plate and a plurality of support pipes. The support pipes are fixedly connected to the bottom of the sedimentation tank 2. The bottom of the impermeable diaphragm plate is fixedly connected to the lower part of the support pipes. A floating ball is movably sleeved on each support pipe. The floating ball can move up and down along the support pipe. The floating balls are all connected to the top of the impermeable diaphragm plate. The support pipes can fix the position of the impermeable diaphragm plate. The floating balls float on the water surface and can move up and down with the change of the water surface. The floating balls drive the top of the impermeable diaphragm plate to change accordingly with the change of the water surface, thereby separating the aquaculture tail water on both sides of the impermeable diaphragm plate, and further making the aquaculture tail water flow in an S shape in the sedimentation tank 2 under the action of the flow guiding baffle 10.

[0024] The utility model adopts a structure of four tanks and three dams. The aquaculture tail water flows from the water inlet 1 into the sedimentation tank 2. The aquaculture tail water flows in an S shape in the sedimentation tank 2 under the action of the flow guiding baffle 10, and then is filtered by the first ecological filtration dam 3 and enters the aeration tank 4. After being aerated and oxygenated by the aeration system 11 in the aeration tank 4, it then flows into the biological purification tank 6 after being filtered by the second ecological filtration dam 5. After being adsorbed and degraded by the biofilm formed by the carbon fiber ecological grass 12 in the biological purification tank 6, it then flows into the clean water tank 8 after being filtered by the third ecological filtration dam 7. The pollutants in the aquaculture tail water are decomposed by aeration and oxygenation in the clean water tank 8 and absorbed by the submerged plants 13 and then discharged through the water outlet 9.

[0025] The ecological filtration dam includes a water retaining dam and a filtration dam. The water retaining dam is an earth wall dam body. The filtration dam is arranged on the top of the water retaining dam. The outer wall of the filtration dam is built with hollow bricks, and the outer wall of the filtration dam is filled with filter materials. The water retaining dam forms a height difference between the water flows on both sides, thereby controlling the water flow direction. The water flow passing through the filtration dam is filtered by the filter materials.

[0026] The aeration system 11 includes a plurality of nano-aeration discs, which are evenly arranged between two side walls of the aeration tank 4 adjacent to the first ecological filtration dam 3. The nano-aeration discs are fixedly connected to the bottom of the aeration tank 4. The nano-aeration discs are connected to a blower through an oxygen supply pipeline, and the nano-aeration discs are used to increase the oxygen content of the aquaculture tail water in the aeration tank 4.

[0027] As an implementable mode, a plurality of fixing brackets and multiple rows of carbon fiber ecological grass 12 are arranged between two side walls of the biological purification tank 6 adjacent to the second ecological filtration dam 5. The bottom of the fixing bracket is fixedly connected to the bottom of the biological purification tank 6, and a row of carbon fiber ecological grass 12 is fixedly hung on each fixing bracket.

[0028] The carbon fiber ecological grass 12 is processed from biocompatible materials and woven into the shape of natural water grass. The surface structure of the carbon fiber ecological grass 12 is used to attach microorganisms and form an adhesive active biofilm on the surface to form a biological film. In the cross-section of the biological film, an aerobic zone and an anaerobic zone are formed from the outside to the inside. The proliferation of aerobic microorganisms in the aerobic zone is used to reduce ammonia nitrogen, and biological denitrification is carried out through the proliferation of anaerobic microorganisms in the anaerobic zone. The microporous structure of the carbon fiber ecological grass 12 has a large adsorption capacity and a fast adsorption efficiency for organic matter and heavy metal ions in the aqueous solution, directly adsorbing and displacing nitrogen and phosphorus in the water body, firmly fixing nitrogen and phosphorus pollutants in the material, and finally converting them into biomass that is difficult to precipitate through biological reactions and natural sedimentation, which is beneficial to the repair of polluted water bodies, can achieve rapid purification of water bodies, reduce the concentration of pollutants such as ammonia nitrogen and COD values in the water bodies, and improve the transparency of the water bodies.

[0029] It should be noted that the embodiments described in the present invention are only examples to illustrate the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A four-pond and three-dam type ecological system for aquaculture tail water treatment, comprising a sedimentation tank (2), an aeration tank (4), a biological purification tank (6), and a cleaning tank (8), characterized in that, There is a water inlet (1) provided on the sedimentation tank (2). Ecological filter dams are provided between the sedimentation tank (2) and the aeration tank (4), between the aeration tank (4) and the biological purification tank (6), and between the biological purification tank (6) and the clean water tank (8), which are the first ecological filter dam (3), the second ecological filter dam (5), and the third ecological filter dam (7) respectively. There is a water outlet (9) provided on the clean water tank (8). A plurality of flow guiding baffles (10) are provided in the sedimentation tank (2). An aeration system (11) is arranged at the bottom of the aeration tank (4). Carbon fiber ecological grass (12) is provided in the biological purification tank (6). Submerged plants (13) are planted in the clean water tank (8). A plurality of aeration devices (14) are evenly arranged in the clean water tank (8).

2. The four-pond and three-dam type ecosystem for aquaculture tail water treatment according to claim 1, characterized in that, The flow guiding baffles (10) are arranged between two side walls of the sedimentation tank (2) adjacent to the first ecological filter dam (3). There are two flow guiding baffles (10) in the sedimentation tank (2). An overflow channel is left between one of the flow guiding baffles (10) and one side wall of the sedimentation tank (2) adjacent to the first ecological filter dam (3), and an overflow channel is left between the other flow guiding baffle (10) and the other side wall of the sedimentation tank (2) adjacent to the first ecological filter dam (3). The lengths of the flow guiding baffles (10) are all greater than half of the distance between the two side walls of the sedimentation tank (2) adjacent to the first ecological filter dam (3) and less than the distance between the two side walls of the sedimentation tank (2) adjacent to the first ecological filter dam (3). The bottom of the flow guiding baffle (10) is fixedly connected to the bottom of the sedimentation tank (2).

3. The four-pond and three-dam type ecosystem for treating aquaculture tail water according to claim 2, characterized in that, The flow guiding baffle (10) includes a flexible impermeable diaphragm plate and a plurality of support pipes. The support pipes are fixedly connected to the bottom of the sedimentation tank (2). The bottom of the impermeable diaphragm plate is fixedly connected to the lower part of the support pipes. A floating water ball is movably sleeved on each support pipe, and the floating water balls are all connected to the top of the impermeable diaphragm plate.

4. The four-pond and three-dam type ecosystem for aquaculture tail water treatment according to claim 1, wherein The ecological filter dam includes a water retaining dam and a filter dam. The filter dam is arranged on the top of the water retaining dam. The outer wall of the filter dam is built with hollow bricks, and the outer wall of the filter dam is filled with filter materials.

5. The four-pond and three-dam type ecosystem for treating aquaculture tail water according to claim 1, wherein The aeration system (11) includes a plurality of nano aeration discs. The plurality of nano aeration discs are evenly arranged between two side walls of the aeration tank (4) adjacent to the first ecological filter dam (3). The nano aeration discs are fixedly connected to the bottom of the aeration tank (4).

6. The four-pond and three-dam type ecosystem for treating aquaculture tail water according to claim 1, characterized in that, A plurality of fixed brackets and multiple rows of carbon fiber ecological grass (12) are arranged between two side walls of the biological purification tank (6) adjacent to the second ecological filter dam (5). The bottom of the fixed brackets is fixedly connected to the bottom of the biological purification tank (6). One row of carbon fiber ecological grass (12) is hung and fixed on each fixed bracket.

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