Tailwater treatment device and tailwater treatment system

Abstract

The invention discloses a tailwater treatment device and a tailwater treatment system. The tailwater treatment device is used to purify tailwater in a pond, and includes a primary purification device, which includes a first liquid storage tank, a first layering component, a first aeration component and a first foam separation component. The first liquid storage tank is connected to the pond, the first layering component is arranged in the first liquid storage tank, the first layering component is used to physically layer the tailwater in the first liquid storage tank, so that the tailwater in the first liquid storage tank forms a first solid-liquid mixed layer and a first liquid layer, the first aeration component is arranged in the first liquid storage tank, the first aeration component is used to form a first foam layer on the surface of the first liquid layer, the first foam separation component is connected to the first liquid storage tank, and extends from the first liquid storage tank to the direction of the pond, the first foam separation component is used to separate the first liquid layer and the first foam layer, and discharge the first liquid layer to the pond. The tailwater treatment device occupies a small area and can reduce the breeding cost.

Description

Technical Field

[0001] The present application relates to the technical field of aquaculture wastewater treatment, and in particular to a tailwater treatment device and a tailwater treatment system. Background Art

[0002] With the promotion of intensive aquaculture models, high density and high feeding have caused serious excess of organic matter in water bodies, resulting in serious water pollution in ponds and affecting the healthy development of the aquaculture industry. Therefore, the treatment of tail water has become an urgent problem to be solved in the aquaculture industry.

[0003] In the related art, the tailwater treatment system for treating tailwater usually includes ecological ditches, sedimentation tanks, filter dams, aeration tanks, filter dams and ecological purification tanks. However, the area of ​​the tailwater treatment system usually accounts for 6%-8% of the total aquaculture area, which occupies a large area and leads to high aquaculture costs. Summary of the invention

[0004] The present application discloses a tailwater treatment device and a tailwater treatment system, which occupy a small area and reduce breeding costs.

[0005] In order to achieve the above objectives, in a first aspect, the present application discloses a tailwater treatment device for purifying tailwater in a pond, comprising:

[0006] A primary purification device comprises a first liquid storage tank, a first stratification component, a first aeration component and a first foam separation component, wherein the first liquid storage tank is connected to the pond, the first stratification component is arranged in the first liquid storage tank, the first stratification component is used to physically stratify the tail water in the first liquid storage tank so that the tail water in the first liquid storage tank forms a first solid-liquid mixed layer and a first liquid layer, the first aeration component is arranged in the first liquid storage tank, the first aeration component is used to aerate the first liquid layer so that a first foam layer is formed on the surface of the first liquid layer, the first foam separation component is connected to the first liquid storage tank and extends from the first liquid storage tank toward the pond, the first foam separation component is used to separate the first liquid layer and the first foam layer and discharge the first liquid layer to the pond.

[0007] In a possible implementation of the first aspect, the tail water treatment device also includes a secondary purification device, which is arranged downstream of the primary purification device, and the inlet of the secondary purification device is connected to the first solid-liquid mixed layer in the primary purification device, and is used to physically stratify the first solid-liquid mixed layer flowing out of the primary purification device to form a second solid-liquid mixed layer and a second liquid layer in the secondary purification device, and the secondary purification device is also used to perform microbial decomposition of organic pollutants in the first solid-liquid mixed layer flowing out of the primary purification device, and the inlet of the secondary purification device is also connected to the first foam separation component to collect the first foam layer; or,

[0008] The primary purification equipment further includes an auxiliary liquid storage tank and an auxiliary stratification component, the inlet of the auxiliary liquid storage tank is communicated with the first solid-liquid mixed layer, the auxiliary stratification component is arranged in the auxiliary liquid storage tank, the auxiliary stratification component is used to physically stratify the first solid-liquid mixed layer again to form a third solid-liquid mixed layer and a third liquid layer in the auxiliary liquid storage tank, the auxiliary liquid storage tank has a first outlet and a second outlet, the first outlet is communicated with the first foam separation component to discharge the third liquid layer to the pond, and the second outlet is communicated with the secondary purification equipment;

[0009] The inlet of the secondary purification equipment is connected to the third solid-liquid mixed layer, and is used to physically stratify the third solid-liquid mixed layer flowing out of the auxiliary liquid storage tank to form a second solid-liquid mixed layer and a second liquid layer in the secondary purification equipment. In addition, the secondary purification equipment is also used to perform microbial decomposition of organic pollutants in the third solid-liquid mixed layer flowing out of the auxiliary liquid storage tank. The inlet of the secondary purification equipment is also connected to the first foam separation component, and is used to collect the first foam layer.

[0010] In a possible implementation of the first aspect, the tail water treatment device also includes a tertiary purification device, which is arranged downstream of the secondary purification device, and the inlet of the tertiary purification device is connected to the second liquid layer in the secondary purification device, for microbial decomposition of organic pollutants in the second liquid layer flowing out of the secondary purification device.

[0011] In a possible implementation of the first aspect, the microbial decomposition is configured to decompose nitrogen and phosphorus in the second liquid layer.

[0012] In a possible implementation of the first aspect, the tail water treatment device further includes a disinfection device, which is disposed at the outlet of the tertiary purification device to disinfect the second liquid layer that has been decomposed by microorganisms.

[0013] In a possible implementation of the first aspect, the tail water treatment device further includes a sewage collecting device, which is disposed in the pond and is used to form a vortex in the pond to concentrate the tail water to be treated at the vortex.

[0014] In a possible implementation of the first aspect, the tailwater treatment device also includes a first monitoring device, which includes a probe and a control component. The probe is used to monitor the dissolved oxygen content, pH and water temperature of the water in the pond. The probe is electrically connected to the control component, and the control component is used to receive data monitored by the probe and to control the start and stop of the primary purification equipment according to the received data.

[0015] In a second aspect, the present application also discloses a tailwater treatment system, comprising:

[0016] The tail water treatment device according to any one of the first aspects,

[0017] The purified water storage channel is arranged downstream of the tail water treatment device, and is used for physically stratifying the purified tail water flowing out of the tail water treatment device and phytodecomposing organic pollutants in the purified tail water.

[0018] In a possible implementation of the second aspect, the purified water storage channel is connected to the pond; or,

[0019] The tail water treatment device includes two groups, namely a first tail water treatment device and a second tail water treatment device, the inlet of the first tail water treatment device is connected to the pond, and the outlet of the first tail water treatment device is connected to the purified water storage channel.

[0020] The inlet of the second tail water treatment device is communicated with the purified water storage channel, and the outlet of the second tail water treatment device is communicated with the pond and / or river.

[0021] In a possible implementation of the second aspect, the tailwater treatment system further includes a second monitoring component, which is used to monitor the tailwater discharged from the second tailwater treatment device and to transmit the monitored data to a display terminal.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] In the present application, a first aeration component is arranged in the first liquid storage tank, and the first aeration component is used to aerate the first liquid layer, forming a plurality of bubbles in the first liquid layer, so that debris, protein, etc. can adhere to the plurality of bubbles, and the plurality of bubbles carry the debris, protein, etc. up in the first liquid layer, so that a first foam layer is formed on the surface of the first liquid layer. The first foam separation component is connected to the first liquid storage tank. The first foam separation component is used to separate the first liquid layer and the first foam layer, and discharge the first liquid layer to the pond, so that the tail water separated from debris, protein, bait and feces can be discharged back to the pond, so that the tail water in the pond can be recycled after being treated by the primary purification equipment, which is beneficial to the greening and sustainable development of the aquaculture industry; and the first stratified component and the first aeration component are both arranged in the first liquid storage tank, the first foam separation component is connected to the first liquid storage tank, and extends from the first liquid storage tank to the pond. Compared with the tail water in the pond, which needs to pass through the ecological ditch and the sedimentation tank in sequence, and then flow to the aeration tank through the filter dam for aeration treatment, and then flow to the ecological purification tank through the filter dam, and finally flow from the ecological purification tank to the pond, the area occupied by the treatment device for treating the tail water in the pond can be effectively reduced, thereby effectively reducing the aquaculture cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a first tailwater treatment device provided in an embodiment of the present application;

[0026] Figure 2 is a structural schematic diagram of a second tailwater treatment device provided in an embodiment of the present application;

[0027] Figure 3 is a structural schematic diagram of a third tailwater treatment device provided in an embodiment of the present application;

[0028] Figure 4 This is a flow chart of the first tailwater treatment provided in the embodiment of the present application;

[0029] Figure 5 This is a flow chart of the second tailwater treatment provided in the embodiment of the present application;

[0030] Figure 6 This is a flow chart of the third type of tail water treatment provided in the embodiments of the present application.

[0031] Description of reference numerals:

[0032] 1-primary purification equipment; 11-first liquid storage tank; 12-first layered assembly; 13-first aeration assembly; 131-inlet valve; 14-first foam separation assembly; 15-auxiliary liquid storage tank; 16-auxiliary layered assembly; 2-secondary purification equipment; 21-septic tank; 22-clean water tank; 3-third-level purification equipment; 4-fourth-level purification equipment; 5-fifth-level purification equipment; 6-sixth-level purification equipment; 7-disinfection equipment; 8-first monitoring equipment; 9-pollution collection equipment;

[0033] 10- tail water treatment device; 20- purified water storage channel;

[0034] 100-tailwater treatment system; 200-pond; 300-river. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In this application, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0038] With the promotion of intensive aquaculture models, high density and high feeding have caused serious excess of organic matter in water bodies, resulting in serious pollution of aquaculture water in ponds, affecting the healthy development of aquaculture. Therefore, the treatment of tail water has become an urgent problem to be solved in the aquaculture industry.

[0039] In the related art, the tailwater treatment system for treating tailwater usually includes ecological ditches, sedimentation tanks, filter dams, aeration tanks, filter dams and ecological purification tanks, that is, the tailwater in the pond is usually purified in sequence through ecological ditches, sedimentation tanks, filter dams, aeration tanks, filter dams and ecological purification tanks before it can reach the standard of being able to be recycled or discharged into rivers. However, the area of ​​the tailwater treatment system in this way usually accounts for 6%-8% of the total breeding area, and the average construction cost per mu can reach 5,000-8,000 yuan, resulting in a large area and high breeding costs.

[0040] Based on this, the present application discloses a tailwater treatment device and a tailwater treatment system, which can reduce the footprint of the device for treating tailwater and also reduce breeding costs.

[0041] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0042] Embodiment 1

[0043] This embodiment provides a tailwater treatment device, such as Figure 1-Figure 4 As shown, for purifying tail water in a pond 200, the tail water treatment device 10 includes a primary purification device 1, and the primary purification device 1 includes a first liquid storage tank 11, a first stratification component 12, a first aeration component 13 and a first foam separation component 14. The first liquid storage tank 11 is connected to the pond 200, and the first stratification component 12 is arranged in the first liquid storage tank 11. The first stratification component 12 is used to physically stratify the tail water in the first liquid storage tank 11 so that the tail water in the first liquid storage tank 11 forms a first solid-liquid mixed layer and a first liquid layer. The first aeration component 13 is arranged in the first liquid storage tank 11. The first aeration component 13 is used to aerate the first liquid layer so that a first foam layer is formed on the surface of the first liquid layer. The first foam separation component 14 is connected to the first liquid storage tank 11 and extends from the first liquid storage tank 11 to the direction of the pond 200. The first foam separation component 14 is used to separate the first liquid layer and the first foam layer and discharge the first liquid layer to the pond 200.

[0044] It should be explained that the tail water in the above-mentioned pond 200 refers to the aquaculture water in the pond 200, which causes aquatic products to be raised, resulting in the water in the pond 200 containing more bait, feces, debris, protein, nitrogen, phosphorus, etc., that is, the water body is rich in nutrients and organic matter. For example, the suspended solids content is greater than 90 mg / L, the pH value is less than 6.0 or greater than 9.0, the chemical oxygen demand is greater than 25 mg / L, the total nitrogen content is greater than 5 mg / L, and the total phosphorus content is greater than 1 mg / L.

[0045] In this embodiment, the first liquid storage tank 11 is connected to the pond 200, so that the tail water in the pond 200 can be introduced into the first liquid storage tank 11. The first stratification component 12 is used to physically stratify the tail water in the first liquid storage tank 11, so that the tail water in the first liquid storage tank 11 can be stratified and form a first solid-liquid mixed layer and a first liquid layer, that is, the heavier bait, feces, etc. in the tail water can be precipitated to the bottom area of ​​the first liquid storage tank 11 to form a first solid-liquid mixed layer, and a first liquid layer containing lighter proteins, debris, etc. can be formed above the first solid-liquid mixed layer.

[0046] The first aeration component 13 is arranged in the first liquid storage tank 11. The first aeration component 13 is used to aerate the first liquid layer, forming a plurality of bubbles in the first liquid layer, so that debris, protein, etc. can adhere to the plurality of bubbles, and the plurality of bubbles carry the debris, protein, etc. to rise in the first liquid layer, so that a first foam layer is formed on the surface of the first liquid layer. The first foam separation component 14 is connected to the first liquid storage tank 11. The first foam separation component 14 is used to separate the first liquid layer and the first foam layer, and discharge the first liquid layer to the pond 200, so that the tail water separated from the debris, protein, bait and feces can be discharged back to the pond 200, so that the tail water in the pond 200 can be recycled after being processed by the primary purification equipment 1, which is beneficial to the greening and sustainable development of the aquaculture industry; and the first layering component 12 and the first aeration component 13 are both arranged in the first storage tank. In the liquid tank 11, the first foam separation component 14 is connected to the first liquid storage tank 11 and extends from the first liquid storage tank 11 to the direction of the pond 200. Compared with the tail water in the pond 200, which needs to pass through the ecological ditch and the sedimentation tank in sequence, and then flow to the aeration tank through the filter dam for aeration treatment, and then flow to the ecological purification tank through the filter dam, and finally flow from the ecological purification tank to the pond 200, the area occupied by the treatment device or treatment system for treating the tail water in the pond 200 can be effectively reduced, thereby effectively reducing the breeding cost.

[0047] The first liquid storage tank 11 may be implemented in a variety of ways. For example, the first liquid storage tank 11 may be an enamel liquid storage tank, a polypropylene liquid storage tank, or a fiberglass liquid storage tank, which is not limited here.

[0048] Furthermore, the first liquid storage tank 11 may be a horizontal tank or a vertical tank, which is not limited here.

[0049] The first liquid storage tank 11 is connected to the pond 200, and the inlet of the first liquid storage tank 11 can be connected to the pond 200 through a water inlet pipe, and a water pump can be installed on the water inlet pipe to quickly pump the pond 200 into the first liquid storage tank 11. In addition, an electric ball valve can be installed on the water inlet pipe, which can cooperate with the water pump to more accurately control the flow rate, water pressure, etc. of the tail water pumped into the first liquid storage tank 11, and the water pump can also be monitored through the electric ball valve.

[0050] The first layered component 12 may also have a variety of implementations. In one possible implementation of the first layered component 12, the first layered component 12 may include a first funnel and a second funnel. The first funnel and the second funnel may be coaxially arranged in the first liquid storage tank 11, and the first funnel is located above the second funnel. The tail water in the pond 200 may be pumped into the first funnel through an inlet pipe, and the outlet of the inlet pipe is located on the upper edge of the inner wall of the first funnel, so that the tail water can rotate along the inner wall of the first funnel to the lower end of the first funnel and flow into the inner wall of the second funnel, so that the tail water can continue to rotate and flow downward along the inner wall of the second funnel. The tail water flowing in the first funnel and the second funnel is caused to rotate. Under the action of centrifugal force, heavier baits, feces, etc. rotate faster and faster and fall out of the first funnel and the second funnel first, so that the heavier baits, feces, etc. fall first, and then a first solid-liquid mixed layer containing more baits and feces is formed in the bottom area of ​​the first liquid storage tank 11, thereby achieving the purpose of solid-liquid stratification of the tail water introduced into the first-level purification equipment 1. The structure is simple, and the space occupied by the first stratification component 12 can be smaller, so that the structure of the first-level purification equipment 1 can be more compact, thereby reducing the occupied area of ​​the tail water treatment device 10.

[0051] In another possible implementation of the first layered component 12, the first layered component 12 may include a primary sedimentation tank and a secondary sedimentation tank arranged side by side in the first liquid storage tank 11, the primary sedimentation tank and the secondary sedimentation tank each including a tank body and a cone, a sewage outlet is provided at the bottom of the cone, the tank bodies of the primary sedimentation tank and the secondary sedimentation tank are connected through a through-wall pipe, a bent pipe is fixedly connected to the end of the through-wall pipe in the primary sedimentation tank, a movable plug-in pipe is provided at the bent pipe, a water inlet is provided near the bottom of the tank body of the primary sedimentation tank, and it can be connected to the pond 200 through the water inlet pipe, and a water outlet is provided near the top of the tank body of the secondary sedimentation tank. After the tail water in the pond 200 enters the first sedimentation tank, since the bottom of the first sedimentation tank is a cone, a rotating vortex will be formed at the bottom of the first sedimentation tank to precipitate the bait, feces, etc. at the bottom of the cone, and can be discharged through the sewage outlet. When the water level in the first sedimentation tank reaches the position of the water inlet hole on the movable plug-in tube, the supernatant of the first sedimentation tank will flow from the water inlet hole into the movable plug-in tube and into the second sedimentation tank through the wall pipe, and form a rotating vortex at the bottom of the second sedimentation tank, fixing the bait, feces, etc. in the supernatant and precipitating them at the bottom of the cone, and can be discharged through the sewage outlet. When the water level reaches the height of the outlet, the upper first liquid layer formed by the supernatant can be aerated through the first aeration layer, and discharged into the pond 200 through the first foam separation component 14, so as to achieve the purpose of treating the tail water for recycling, and the structure is simple and easy to manufacture and implement.

[0052] The first aeration component 13 also has multiple implementation methods. In one possible implementation method of the first aeration component 13, the first aeration component 13 may include an impeller located in the first liquid layer, an air intake pipe connected to the interior of the first liquid storage tank 11, and an air intake valve 131 arranged on the air intake pipe. The flow rate of air entering the first liquid storage tank 11 is controlled by opening and closing the air intake valve 131, and the water in the first liquid layer is stirred by the impeller so that a larger area of ​​the water can be in contact with the introduced air to form a larger number of bubbles, thereby producing a better aeration effect.

[0053] In another possible implementation of the first aeration component 13, the first aeration component 13 includes an air compressor and a porous tube. The porous tube is arranged in the first liquid layer. The air compressor is arranged on the outside of the first liquid storage tank 11 and can be connected to the porous tube through an air pipe. The air compressor can transport air to the porous tube, so that the air can escape into the first liquid layer through the small holes on the porous tube to form a large number of bubbles in the first liquid layer. Only the porous tube is arranged in the first liquid storage tank 11, so that the first aeration component 13 can occupy a smaller space of the first liquid storage tank 11, and the volume of the first liquid storage tank 11 can be set smaller, thereby reducing the floor area of ​​the primary purification equipment 1.

[0054] The first foam separation component 14 mentioned above also has a variety of implementation methods. For example, the first foam separation component 14 may include a drainage pipe extending from the first liquid storage tank 11 to the pond 200 and a foam discharge pipe for conveying foam. The water inlet of the drainage pipe may be arranged at a position of the first liquid storage tank 11 close to the first layered component 12, that is, the water inlet of the water inlet pipe is arranged at a position close to the middle of the first liquid layer or between the middle and the bottom on the first liquid storage tank 11, and the water inlet of the foam discharge pipe may be arranged close to the top of the first liquid storage tank 11, so that the discharge of the first liquid layer and the discharge of the first foam layer can be carried out separately, avoiding the first foam layer and the first liquid passing through the same pipe. When the water is discharged from the first foam layer, part of the foam in the first foam layer is discharged into the pond 200 together with the first liquid layer; alternatively, the first foam separation component 14 may include a filter tank arranged in the first liquid storage tank 11 and a drain pipe extending from the first liquid storage tank 11 to the pond 200, the filter tank having a filter port, a filter element being arranged on the filter port, the filter element being used to filter the foam, the drain pipe being connected to the filter port on the filter tank, the first liquid layer and the first foam layer being filtered by the filter element, so that the foam can be collected in the filter tank, and the first liquid layer can be discharged into the pond 200 through the drain pipe, so that the foam on the first liquid layer can be filtered more cleanly.

[0055] In some embodiments, Figure 2 As shown, the tailwater treatment device 10 also includes a secondary purification device 2, which is arranged downstream of the primary purification device 1. The inlet of the secondary purification device 2 is connected to the first solid-liquid mixed layer in the primary purification device 1, and is used to physically stratify the first solid-liquid mixed layer flowing out of the primary purification device 1 to form a second solid-liquid mixed layer and a second liquid layer in the secondary purification device 2. In addition, the secondary purification device 2 is also used to perform microbial decomposition of organic pollutants in the first solid-liquid mixed layer flowing out of the primary purification device 1. The inlet of the secondary purification device 2 is also connected to the first foam separation component 14 for collecting the first foam layer.

[0056] It should be explained that the above-mentioned secondary purification equipment 2 is arranged downstream of the primary purification equipment 1, which means that in the process flow of tail water treatment, the secondary purification equipment 2 is located downstream of the primary purification equipment 1, and does not mean that the secondary purification equipment 2 is located downstream of the primary purification equipment 1 in terms of position.

[0057] Thus, the first solid-liquid mixed layer can continue to be stratified to further precipitate and separate the bait, feces, etc. in the first solid-liquid mixed layer, and the organic pollutants such as nitrides, phosphates, carbohydrates, proteins, etc. in the first solid-liquid mixed layer can be decomposed by microorganisms to reduce the content of nitrogen, phosphorus, etc. in the first solid-liquid mixed layer, so that the water in the second liquid layer is more suitable for being discharged into the pond 200 for utilization again.

[0058] In addition, the inlet of the secondary purification device 2 is also connected to the first foam separation component 14, which is used to collect the first foam layer. Not only can the debris, protein, etc. in the first foam layer be decomposed by microorganisms in the secondary purification device 2, but the water in the first foam layer can also be recycled, saving energy.

[0059] Among them, the secondary purification equipment 2 may include multiple septic tanks 21 and clean water tanks 22. The multiple septic tanks 21 are arranged in parallel, and two adjacent septic tanks 21 are connected by a U-shaped connecting pipe. One of the multiple septic tanks 21 close to the primary purification equipment 1 is connected to the first solid-liquid mixed layer in the primary purification equipment 1, and one of the multiple septic tanks 21 far away from the primary purification equipment 1 is connected to the clean water tank 22, so that under the action of air pressure, the first solid-liquid mixed layer can flow through the multiple septic tanks 21 in turn, so that the bait and feces in the first solid-liquid mixed layer are precipitated in the multiple septic tanks 21 in turn to obtain a second solid-liquid mixed layer and a second liquid layer. The second liquid layer can flow into the clean water tank 22 and can be stored in the clean water tank 22.

[0060] In addition, microorganisms can be released into the clean water tank 22 and multiple septic tanks 21 to carry out preliminary microbial decomposition of organic pollutants such as proteins, nitrides, phosphates, carbohydrates, etc. in the second liquid layer, and decompose organic pollutants such as proteins, nitrides, phosphates, carbohydrates, etc. in the second liquid layer into simple inorganic substances, thereby achieving denitrification and phosphorus removal operations in the second liquid layer.

[0061] Among them, the microorganism can be at least one of Bacillus, Pseudomonas, Proteus, phosphate bacteria, phosphate-solubilizing bacteria, Penicillium, phosphate-accumulating bacteria, denitrifying bacteria, decarbonizing bacteria, nitrifying bacteria, etc., and is not limited here.

[0062] In addition, some dephosphorizing agents, denitrifying agents, etc. may be put into the secondary purification device 2 so that the secondary purification device 2 can achieve better denitrification and dephosphorization effects on the second liquid layer.

[0063] In other embodiments, Figure 3As shown, the primary purification device 1 also includes an auxiliary liquid storage tank 15 and an auxiliary stratification component 16. The inlet of the auxiliary liquid storage tank 15 is connected to the first solid-liquid mixed layer. The auxiliary stratification component 16 is arranged in the auxiliary liquid storage tank 15. The auxiliary stratification component 16 is used to physically stratify the first solid-liquid mixed layer to form a third solid-liquid mixed layer and a third liquid layer in the auxiliary liquid storage tank 15. The auxiliary liquid storage tank 15 has a first outlet and a second outlet. The first outlet is connected to the first foam separation component 14 to discharge the third liquid layer to the pond 200, and the second outlet is connected to the secondary purification device 2; the inlet of the secondary purification device 2 is connected to the third solid-liquid mixed layer, which is used to physically stratify the third solid-liquid mixed layer flowing out of the auxiliary liquid storage tank 15 to form a second solid-liquid mixed layer and a second liquid layer in the secondary purification device 2, and the secondary purification device 2 is also used to perform microbial decomposition of organic pollutants in the third solid-liquid mixed layer flowing out of the auxiliary liquid storage tank 15. The inlet of the secondary purification device 2 is also connected to the first foam separation component 14 to collect the first foam layer.

[0064] Therefore, the first-stage purification equipment 1 can perform two-layer treatment on the tail water in the pond 200 to precipitate more bait, feces, etc. in the tail water, so that the content of bait, feces, etc. in the third liquid layer discharged to the pond 200 can be lower, making it more suitable for discharge to the pond 200 for reuse.

[0065] The structure of the auxiliary liquid storage tank 15 may be substantially the same as the structure of the first liquid storage tank 11 , and details may be referred to above, which will not be described again.

[0066] The structure of the auxiliary layered component 16 may be substantially the same as the structure of the first layered component 12 described above, and the details may be referred to above, which will not be described again here.

[0067] Alternatively, if Figure 2-Figure 4 As shown, the tailwater treatment device 10 also includes a tertiary purification device 3, which is arranged downstream of the secondary purification device 2. The inlet of the tertiary purification device 3 is connected to the second liquid layer in the secondary purification device 2, and is used for microbial decomposition of organic pollutants in the second liquid layer flowing out of the secondary purification device 2.

[0068] In this way, organic pollutants such as nitrides, phosphates, carbohydrates, proteins, etc. in the second liquid layer flowing out of the secondary purification device 2 can be decomposed by microorganisms, so that the content of organic pollutants in the tail water in the tertiary purification device 3 is lower, so that the tail water treated by the tertiary purification device 3 can meet the discharge requirements.

[0069] It should be explained that the tail water treated by the tertiary purification equipment 3 meets the discharge requirements, which means that the content of suspended solids in the discharged tail water is less than or equal to 100 mg / L, the pH value is greater than or equal to 6.0 and less than or equal to 9.0, the chemical oxygen demand is less than or equal to 25 mg / L, the total nitrogen content is less than or equal to 5 mg / L, and the total phosphorus content is less than or equal to 1 mg / L.

[0070] Among them, the inlet of the tertiary purification equipment 3 is connected to the second liquid layer in the secondary purification equipment 2. The secondary purification equipment 2 may include a clean water tank 22 for storing the second liquid layer, and an outlet is arranged near the top of the clean water tank 22. The outlet is connected to a water pipe, and the other end of the water pipe is connected to the inlet of the tertiary purification equipment 3; the tertiary purification equipment 3 may include a water storage tank, and the inlet of the tertiary purification equipment 3 may be arranged near the bottom of the water storage tank.

[0071] In addition, a water pump and an electric ball valve may be provided on the water pipe connected between the secondary purification device 2 and the tertiary purification device 3 so that the water speed and water pressure flowing to the tertiary purification device 3 can be controlled more accurately.

[0072] In addition, the bottom of the water storage tank of the tertiary purification equipment 3 can be paved with pebbles. After being placed for a certain period of time, the pebbles are prone to grow moss or algae, and then the moss or algae can quickly cultivate bacterial flora that can decompose organic pollutants such as chemicals, phosphates, carbohydrates, proteins, etc., so that the bacterial flora content in the water storage tank can be higher, thereby making the efficiency of nitrogen removal and phosphorus removal in the second liquid layer higher.

[0073] Among them, a porous plate can be arranged near the bottom of the water tank, so that the oxygen content in the water in the area below the porous plate in the water tank is lower, so that anaerobic bacteria can decompose organic pollutants in the second liquid layer within this range; the oxygen content in the water in the range from the porous plate upward to the middle area of ​​the water tank is slightly higher, so that facultative anaerobic bacteria can decompose organic matter in the second liquid layer within this range; the oxygen content in the water in the range from the middle area of ​​the water tank upward to the top of the water tank is higher, so that aerobic bacteria can decompose organic pollutants in the second liquid layer within this range.

[0074] The above-mentioned anaerobic bacteria may be Pseudomonas, Bacillaceae, etc., which are not limited here. Aerobic bacteria may be nitrite bacteria, nitrate bacteria, etc., which are not limited here. Facultative anaerobic bacteria may be Rhodospirilla, Monterrey Denitrifying Complex Bacillus IDN-B5, etc., which are not limited here.

[0075] In addition, the above-mentioned microbial decomposition is configured to decompose nitrogen and phosphorus in the second liquid layer, thereby effectively reducing the content of nitrogen, phosphorus, etc. in the second liquid layer, making the treated second liquid layer more suitable for discharge into the pond 200 for reuse.

[0076] Alternatively, if Figure 3 and Figure 4 As shown, the tailwater treatment device 10 further includes a disinfection device 7, which is disposed at the outlet of the tertiary purification device 3 to disinfect the second liquid layer that has been decomposed by microorganisms.

[0077] Therefore, by disinfecting the second liquid layer that has been decomposed by microorganisms, the microorganisms in the second liquid layer are killed, thereby achieving the purpose of sterilization, so that the discharged second liquid layer can have higher safety.

[0078] Among them, the disinfection equipment 7 can be of various types, such as ultraviolet disinfection equipment 7, which has high sterilization efficiency and can kill almost all bacteria and viruses without causing secondary pollution; it can also be ozone disinfection equipment 7; it can also be chlorine disinfection equipment 7, etc., which is not limited here.

[0079] Alternatively, if Figure 1-Figure 3 As shown, the tailwater treatment device 10 also includes a sewage collecting device 9, which is arranged in the pond 200 and is used to form a vortex in the pond 200 to concentrate the tailwater to be treated at the vortex.

[0080] In this way, heavier pollutants such as bait, feces, debris, protein, etc. can be concentrated in the central area of ​​the cyclone, so that the tail water located in the central area of ​​the cyclone can be pumped into the primary purification equipment 1 for treatment first, effectively reducing the content of pollutants such as bait, feces, debris, protein, etc. in the water in the pond 200.

[0081] The sewage collection device 9 may include a plurality of waterwheel aerators, which may be arranged at intervals along the diagonal lines of the pond 200. For example, when the pond 200 is a rectangular pond 200, there may be four waterwheel aerators, which are arranged opposite to each other along the two diagonal lines of the pond 200, so as to form a vortex in the central area of ​​the pond 200. Of course, the number of waterwheel aerators may also be two, three, five or more, as long as a vortex can be formed in the pond 200, and this is not limited here.

[0082] In addition, the pollution collection equipment 9 may also include a plurality of impeller aerators, and the plurality of impeller aerators may be arranged at intervals with the plurality of waterwheel aerators, and the plurality of impeller aerators may be arranged at intervals so as to form a larger vortex in the pond 200, thereby making it easier for pollutants such as bait, feces, debris, protein, etc. to be concentrated in the central area of ​​the vortex.

[0083] In some embodiments, Figure 1-Figure 3 As shown, the tailwater treatment device 10 also includes a first monitoring device 8, which includes a probe and a control component. The probe is used to monitor the dissolved oxygen content, pH and water temperature of the water in the pond 200. The probe is electrically connected to the control component. The control component is used to receive data monitored by the probe and to control the start and stop of the first-level purification equipment 1 according to the received data.

[0084] Therefore, the first monitoring device 8 can monitor the parameters such as the dissolved oxygen content, pH value and water temperature of the water in the pond 200 in real time. When the dissolved oxygen content, pH value, etc. of the water are not within the range suitable for aquatic product farming, the first-level purification device 1 can be turned on in time to purify the water in the pond 200, which is beneficial to the green development of the aquaculture in the pond 200.

[0085] Among them, the probe may include a dissolved oxygen sensor, a water temperature sensor, a pH value sensor, etc.

[0086] The control component may include a box body and a control circuit board arranged in the box body, etc. The box body can be fixed on the outer wall of the first liquid storage tank 11. The control circuit board is electrically connected to the probe to receive data monitored by the probe, and can control the start and stop of the first-level purification equipment 1 according to the data, so as to facilitate timely treatment of the water in the pond 200 according to the condition of the water in the pond 200.

[0087] In addition, the control component can also be electrically connected to the secondary purification equipment 2, the tertiary purification equipment 3, the sewage collection equipment 9 and the disinfection equipment 7, so that the tailwater treatment device 10 can purify the water in the pond 200 in time, which is beneficial to the green development of pond 200 aquaculture.

[0088] Embodiment 2

[0089] The present application also provides a tailwater treatment system. Figure 5-Figure 6 As shown, it includes a tailwater treatment device 10 and a purified water storage channel 20 according to any one of the above-mentioned embodiments, wherein the purified water storage channel 20 is arranged downstream of the tailwater treatment device 10, and is used to physically stratify the purified tailwater flowing out of the tailwater treatment device and to perform plant decomposition on organic pollutants in the purified tailwater.

[0090] In this embodiment, the tail water purified and treated by the tail water treatment device 10 can be stratified again in the purification water storage channel 20 and the organic pollution therein can be decomposed by plants, so that the tail water purified by the purification water storage channel 20 can further meet the discharge requirements of the tail water. In addition, the purification water storage channel 20 can also store the purified tail water flowing out of the tail water treatment device 10, so that the tail water treatment device 10 can treat the tail water in multiple ponds 200, thereby improving the treatment efficiency of the tail water in the ponds 200.

[0091] Moreover, the tailwater treatment device 10 in the tailwater treatment system 100 is the tailwater treatment device 10 described in the above-mentioned embodiment 1. Therefore, the tailwater treatment device 10 in this embodiment has the technical effect of the tailwater treatment device 10 in the above-mentioned embodiment 1. Since the technical effect of the tailwater treatment device 10 has been fully explained in embodiment 1, it will not be repeated here.

[0092] Among them, the purification water storage channel 20 can have a variety of ways to stratify the purified tail water flowing out of the tail water treatment device 10, such as, the length of the purification water storage channel 20 can be set longer, so that the bait, feces, etc. in the tail water can be gradually settled to the bottom of the purification water storage channel 20 during the flow of the tail water in the purification water storage channel 20; the width of the purification water storage channel 20 can also be set wider, such as, the width can be greater than or equal to 3m, so that the flow rate of the tail water in the purification water storage channel 20 can be slower, which is conducive to the precipitation of heavier bait, feces, etc.; it can also be that the depth of the purification water storage channel 20 is set deeper, such as the depth can be greater than or greater than 1.5m, so that the purification water storage channel 20 can store more water, and more aquatic plants can be planted in the purification water storage channel 20, which can also make the flow rate of the tail water in the purification water storage channel 20 slower, which is conducive to the precipitation of heavier bait, feces, etc.

[0093] There are also many ways for the purified water storage channel 20 to perform plant decomposition on the organic pollutants in the purified tail water flowing out of the tail water treatment device 10. For example, a plurality of artificial biological floating beds can be set in the purified water storage channel 20 along its length direction. Plants with well-developed root systems such as water hyacinth, water spinach, blue bird flower, water lily, etc. can be planted in the artificial biological floating beds, so that the artificial biological floating beds have a better effect on the decomposition and absorption of nitrogen and phosphorus in the water in the purified water storage channel 20; aquatic plants such as bamboo leaf eye can also be planted in the purified water storage channel 20. Water spinach, water algae, water hyacinth, etc. can not only make the tail water flow slower in the purification water storage channel 20, which is conducive to the precipitation of bait and feces, but also can decompose and absorb organic pollutants in the tail water, so that the purification water storage channel 20 can have a better treatment effect on the tail water; it is also possible to plant green plants on the slope of the purification water storage channel 20, such as calamus, water onion, water celery, loosestrife, etc., which can also decompose and absorb organic pollutants in the tail water, so that the purification water storage channel 20 can have a better treatment effect on the tail water.

[0094] In addition, when an artificial biological floating bed is provided in the purification water storage channel 20, aquatic plants are planted, and aquatic plants are also planted on the slope of the purification water storage channel 20, the coverage area of ​​the plants in the artificial biological floating bed and the aquatic plants on the water surface of the purification water storage channel 20 can be greater than or equal to 40% of the area of ​​the water surface of the purification water storage channel 20, so that after the purification water storage channel 20 carries out plant decomposition of the tail water, the content of nitrogen, phosphorus, etc. in the tail water can be lower, which is more suitable for being discharged into the pond 200 for breeding again.

[0095] In some embodiments, Figure 5 As shown, the purified water storage channel 20 is connected to the pond 200, so that the water purified and treated by the purified water storage channel 20 can be discharged into the pond 200 for reuse, which is beneficial to the green development of aquaculture in the pond 200 and can reduce aquaculture costs.

[0096] In other embodiments, Figure 6 As shown, the tailwater treatment device 10 includes two groups, namely a first tailwater treatment device and a second tailwater treatment device. The inlet of the first tailwater treatment device is connected to the pond 200, and the outlet of the first tailwater treatment device is connected to the purified water storage channel 20; the inlet of the second tailwater treatment device is connected to the purified water storage channel 20, and the outlet of the second tailwater treatment device is connected to the pond 200, or the outlet of the second tailwater treatment device is connected to the river 300, or the second tailwater treatment device is connected to both the pond 200 and the river 300.

[0097] In this way, the tail water in the pond 200 can be purified and treated in sequence by the first tail water treatment device, the purification water storage channel 20 and the second tail water treatment device. While reducing the footprint of the tail water treatment system 100, the tail water treatment system 100 can also achieve better treatment effect on the tail water of the pond 200, so that the treated tail water can be discharged back to the pond 200 for continued breeding, or discharged into the river 300.

[0098] Exemplarily, the first tail water treatment device may include a primary purification device 1 , a secondary purification device 2 , and a tertiary purification device 3 , and the second tail water treatment device may include a quaternary purification device 4 , a fifth purification device 5 , and a sixth purification device 6 .The secondary purification device 2 is arranged downstream of the primary purification device 1, and the inlet of the secondary purification device 2 is connected to the first solid-liquid mixed layer in the primary purification device 1, and is used to physically stratify the first solid-liquid mixed layer flowing out of the primary purification device 1 to form a second solid-liquid mixed layer and a second liquid layer in the secondary purification device 2, and the secondary purification device 2 is also used to perform microbial decomposition on the organic pollutants in the first solid-liquid mixed layer flowing out of the primary purification device 1, and the inlet of the secondary purification device 2 is also connected to the first foam separation component 14 for collecting the first foam layer; the tertiary purification device 3 is arranged downstream of the secondary purification device 2, and the inlet of the tertiary purification device 3 is connected to the first solid-liquid mixed layer in the secondary purification device 2. The two liquid layers are connected, and are used to perform microbial decomposition on the organic pollutants in the second liquid layer flowing out of the secondary purification device 2. The outlet of the tertiary purification device 3 is connected to the purified water storage channel 20 to discharge the second liquid layer decomposed by microorganisms into the purified water storage channel 20; the quaternary purification device 4 includes a second liquid storage tank, a second stratification component, a second aeration component and a second foam separation component. The second liquid storage tank is connected to the purified water storage channel 20, and the second stratification component is arranged in the second liquid storage tank. The second stratification component is used to perform physical stratification on the tail water that has been physically stratified and decomposed by plants and flows out of the purified water storage channel 20, so that the tail water in the quaternary purification device 4 forms a third solid-liquid mixed layer and a third liquid layer. The second The aeration component is arranged in the second liquid storage tank, and the second aeration component is used to aerate the third liquid layer so that a second foam layer is formed on the surface of the third liquid layer. The second foam separation component is connected to the second liquid storage tank, and the second foam separation component is used to separate the third liquid layer from the second foam layer, and discharge the third liquid layer to the purified water storage channel 20; the five-stage purification device 5 is arranged downstream of the four-stage purification device 4, and the inlet of the five-stage purification device 5 is connected to the third solid-liquid mixed layer in the four-stage purification device 4, and is used to physically stratify the third solid-liquid mixed layer flowing out of the four-stage purification device 4 to form a fourth solid-liquid mixed layer and a fourth liquid layer in the five-stage purification device 5, and the five-stage purification device 5 is also used to stratify the third solid-liquid mixed layer flowing out of the four-stage purification device 4. The organic pollutants in the third solid-liquid mixed layer flowing out of the stage 4 are decomposed by microorganisms, and the inlet of the fifth-stage purification equipment 5 is also connected to the second foam separation component for collecting the second foam layer; the sixth-stage purification equipment 6 is arranged downstream of the fifth-stage purification equipment 5, and the inlet of the sixth-stage purification equipment 6 is connected to the fourth liquid layer in the fifth-stage purification equipment 5, for decomposing the organic pollutants in the fourth liquid layer flowing out of the fifth-stage purification equipment 5 by microorganisms, and the outlet of the sixth-stage purification equipment 6 is connected to the pond 200 to discharge the fourth liquid layer decomposed by microorganisms to the pond 200, or the outlet of the sixth-stage purification equipment 6 is used to be connected to a river to discharge the fourth liquid layer decomposed by microorganisms to the river.

[0099] Thus, the tail water in the pond 200 can be sequentially passed through the first-level purification equipment 1 for the first physical stratification, the second-level purification equipment 2 for the second physical stratification and the first microbial decomposition, the third-level purification equipment 3 for the second microbial decomposition, the third physical stratification and plant decomposition of the purified water storage channel 20, the fourth physical stratification of the fourth-level purification equipment 4, the fifth physical stratification and the third microbial decomposition of the fifth-level purification equipment 5, and the fourth microbial decomposition of the sixth-level purification equipment 6. While reducing the footprint of the tail water treatment system 100, the tail water treatment system 100 can also achieve better treatment effect on the tail water of the pond 200, so that the treated tail water can be discharged back to the pond 200 for continued breeding, or discharged into the river 300.

[0100] Of course, after the second liquid layer tail water discharged from the first tail water treatment device is physically stratified and the plant is decomposed, a part of the purified water storage channel 20 can be directly discharged into the pond 200 for continued breeding, and the other part is introduced into the second tail water treatment device for continued purification. For example, after the second liquid layer is physically stratified and the plant is decomposed, a part of the purified water storage channel 20 can be directly discharged into the pond 200, and the other part is introduced into the fourth-stage purification device 4 for continued purification.

[0101] Among them, the secondary purification equipment 2 can be the same as the secondary purification equipment 2 in Example 1, the tertiary purification equipment 3 can be the same as the tertiary purification equipment 3 in the above-mentioned Example 1, the fourth-level purification equipment 4 can be the same as the above-mentioned first-level purification equipment 1, the fifth-level purification equipment 5 can be the secondary purification equipment 2 in the above-mentioned Example 1, and the sixth-level purification equipment 6 can be the same as the tertiary purification equipment 3 in the above-mentioned Example 1, which effectively reduces the cost of the tailwater treatment system 100.

[0102] Optionally, a disinfection device 7 may be provided at the outlet of the six-stage purification device 6. The disinfection device 7 may be the same as the disinfection device 7 in the first embodiment to disinfect and sterilize the fourth liquid layer that has been decomposed by microorganisms.

[0103] In addition, the tail water treatment system 100 further includes a second monitoring component, which is used to monitor the tail water discharged from the second tail water treatment device and to transmit the monitored data to the display terminal.

[0104] Thus, the tail water discharged from the second tail water treatment device can be monitored in real time to ensure that the tail water discharged from the second tail water treatment device meets the discharge requirements, so that pond aquaculture can be better developed in a green way and is not easy to pollute rivers. In addition, the second monitoring component can also transmit the monitored data to the display terminal to facilitate the staff to view the tail water discharged from the second tail water treatment device in real time, reducing the probability that the tail water discharged from the second tail water treatment device does not meet the discharge requirements due to a failure of either the first tail water treatment device or the second tail water treatment device.

[0105] Exemplarily, the second monitoring component can be used to monitor the fourth liquid layer discharged from the six-stage purification device 6 and decomposed by microorganisms, and to transmit the monitored data to the display terminal.

[0106] Thus, the tail water from the six-stage purification equipment 6 can be monitored in real time to ensure that the tail water discharged from the six-stage purification equipment 6 meets the discharge requirements. In addition, the second monitoring component can also transmit the monitored data to the display terminal to facilitate the staff to view the tail water discharged from the six-stage purification equipment 6 in real time, thereby reducing the probability that the tail water discharged from the six-stage purification equipment 6 does not meet the discharge requirements due to a failure of any one of the first to sixth-stage purification equipment 6.

[0107] Among them, the second monitoring component can be an automatic water quality monitoring station, which may include a chassis and a COD (Chemical Oxygen Demand) detector, a total nitrogen detector, a total phosphorus analyzer, a pH sensor, a suspended matter sensor and other equipment arranged in the chassis, to realize automatic and continuous monitoring of suspended matter, COD, total phosphorus, total nitrogen and pH value in the treated tail water discharged from the six-stage purification equipment 6, and the monitoring data can be automatically uploaded to the cloud, can be viewed in real time through the terminal, and can be warned in time when the water quality is abnormal.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tailwater treatment device, characterized in that: For purification of tail water in ponds, including: A primary purification device, comprising a first liquid storage tank, a first stratification component, a first aeration component and a first foam separation component, wherein the first liquid storage tank is connected to the pond, the first stratification component is arranged in the first liquid storage tank, the first stratification component is used to physically stratify the tail water in the first liquid storage tank so that the tail water in the first liquid storage tank forms a first solid-liquid mixed layer and a first liquid layer, the first aeration component is arranged in the first liquid storage tank, the first aeration component is used to aerate the first liquid layer so that a first foam layer is formed on the surface of the first liquid layer, the first foam separation component is connected to the first liquid storage tank and extends from the first liquid storage tank to the pond, the first foam separation component is used to separate the first liquid layer from the first foam layer and discharge the first liquid layer to the pond; The tail water treatment device also includes a secondary purification device, which is arranged downstream of the primary purification device, and the inlet of the secondary purification device is connected to the first solid-liquid mixed layer in the primary purification device, and is used to physically stratify the first solid-liquid mixed layer flowing out of the primary purification device to form a second solid-liquid mixed layer and a second liquid layer in the secondary purification device, and the secondary purification device is also used to perform microbial decomposition on organic pollutants in the first solid-liquid mixed layer flowing out of the primary purification device, and the inlet of the secondary purification device is also connected to the first foam separation component for collecting the first foam layer; or the primary purification device also includes an auxiliary liquid storage tank and an auxiliary stratification component, the inlet of the auxiliary liquid storage tank is connected to the first solid-liquid mixed layer, the auxiliary stratification component is arranged in the auxiliary liquid storage tank, and the auxiliary stratification The component is used to physically stratify the first solid-liquid mixed layer again to form a third solid-liquid mixed layer and a third liquid layer in the auxiliary liquid storage tank, the auxiliary liquid storage tank has a first outlet and a second outlet, the first outlet is connected to the first foam separation component to discharge the third liquid layer to the pond, the second outlet is connected to a secondary purification device, the inlet of the secondary purification device is connected to the third solid-liquid mixed layer, and is used to physically stratify the third solid-liquid mixed layer flowing out of the auxiliary liquid storage tank to form a second solid-liquid mixed layer and a second liquid layer in the secondary purification device, and the secondary purification device is also used to microbially decompose organic pollutants in the third solid-liquid mixed layer flowing out of the auxiliary liquid storage tank, and the inlet of the secondary purification device is also connected to the first foam separation component to collect the first foam layer; The tailwater treatment device also includes a tertiary purification device, which is arranged downstream of the secondary purification device, and the inlet of the tertiary purification device is connected to the second liquid layer in the secondary purification device, and is used to perform microbial decomposition of organic pollutants in the second liquid layer flowing out of the secondary purification device; The three-stage purification equipment includes a water storage tank, and the inlet of the three-stage purification equipment is arranged near the bottom of the water storage tank; The bottom of the water storage tank is paved with pebbles; A porous plate is arranged in the water storage tank near the bottom thereof.

2. The tailwater treatment device according to claim 1, characterized in that: The microbial decomposition is configured to decompose nitrogen and phosphorus in the second liquid layer.

3. The tailwater treatment device according to claim 1, characterized in that: The tail water treatment device further comprises a disinfection device, which is arranged at the outlet of the tertiary purification device to disinfect the second liquid layer that has been decomposed by microorganisms.

4. The tailwater treatment device according to any one of claims 1 to 3, characterized in that: The tail water treatment device further comprises a pollutant collecting device, which is arranged in the pond and is used to form a vortex in the pond to collect the tail water to be treated at the vortex.

5. The tailwater treatment device according to any one of claims 1 to 3, characterized in that: The tailwater treatment device also includes a first monitoring device, which includes a probe and a control component. The probe is used to monitor the dissolved oxygen content, pH and water temperature of the water in the pond. The probe is electrically connected to the control component. The control component is used to receive the data monitored by the probe and to control the start and stop of the primary purification equipment according to the received data.

6. A tailwater treatment system, characterized in that: include: The tail water treatment device according to any one of claims 1 to 5, The purified water storage channel is arranged downstream of the tail water treatment device, and is used for physically stratifying the purified tail water flowing out of the tail water treatment device and phytodecomposing organic pollutants in the purified tail water.

7. The tailwater treatment system according to claim 6, characterized in that: The purified water storage channel is connected to the pond; or, The tail water treatment device includes two groups, namely a first tail water treatment device and a second tail water treatment device, the inlet of the first tail water treatment device is connected to the pond, and the outlet of the first tail water treatment device is connected to the purified water storage channel. The inlet of the second tail water treatment device is communicated with the purified water storage channel, and the outlet of the second tail water treatment device is communicated with the pond and / or river.

8. The tailwater treatment system according to claim 7, characterized in that: The tail water treatment system further includes a second monitoring component, which is used to monitor the tail water discharged from the second tail water treatment device and to transmit the monitored data to a display terminal.

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