A system for purifying seawater culture tail water in situ

Abstract

The application discloses a seawater breeding tail water in-situ purification treatment system, which comprises sequentially connected primary filter tank, buffer tank, sedimentation tank, curtain purification tank, aeration biological tank and ecological purification tank, wherein the primary filter tank is provided with a water inlet, the primary filter tank, the buffer tank, the sedimentation tank and the curtain purification tank are connected through pipelines, the curtain purification tank, the aeration biological tank and the ecological purification tank are provided with an embedded groove type module filter dam, the curtain purification tank, the aeration biological tank and the ecological purification tank are connected through the embedded groove type module filter dam, and the ecological purification tank is provided with a water outlet. The seawater breeding tail water is treated by the multiple treatment units of the primary filter tank, the buffer tank, the sedimentation tank, the curtain purification tank, the aeration biological tank and the ecological purification tank, so that the particulate matters and the nutrient elements such as nitrogen and phosphorus in the tail water can be effectively removed, the system is not prone to be blocked, is stable in operation, has a large treatment capacity and is low in treatment cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mariculture tail water treatment, and in particular to a mariculture tail water in-situ purification treatment system. BACKGROUND

[0002] In recent years, China's mariculture industry is rapidly developing towards intensification, but with the rapid development of mariculture industry, the risk of environmental pollution has also increased. The mariculture tail water contains pollutants such as residual feed and animal excrement, and if it is discharged without treatment, it will reduce the dissolved oxygen in the environment, increase the content of ammonia nitrogen, nitrite nitrogen and other substances in the water, and breed a large number of bacteria, microorganisms and other substances, causing water eutrophication.

[0003] A mariculture tail water discharge ditch in-situ ecological treatment system and method are disclosed in Chinese Patent Publication No. CN113800648A, published on December 17, 2021, which includes a composite biological purification filter bed, a plug flow aeration device, a biological carrier assembly, and an ecological floating bed. The composite biological purification filter bed is arranged on both sides of the discharge ditch adjacent to the adjacent slope. The composite biological purification filter bed is provided with 2-4 layers of filter bed substrates from the bottom of the water. The plug flow aeration device is hollow inside, and the plug flow aeration device is arranged 0.5-1m below the water surface in the direction of the water flow. The ecological floating bed is planted with salt-tolerant plants. The treatment system has the following defects: (1) easy to block, poor running stability, and small treatment capacity; (2) needs to add mineral water purifying agent, high treatment cost. SUMMARY

[0004] The present application is to solve the problems of the existing mariculture tail water discharge ditch in-situ ecological treatment system, and provides a mariculture tail water in-situ purification treatment system that is not easy to block, has stable operation, large treatment capacity, and low treatment cost.

[0005] The seawater aquaculture tail water in-situ purification treatment system of the application comprises, in sequence, an initial filter tank, a buffer tank, a sedimentation tank, a curtain purification tank, an aeration biological tank and an ecological purification tank, a water inlet is arranged on the initial filter tank, the initial filter tank, the buffer tank, the sedimentation tank and the curtain purification tank are connected through pipelines, a slot-in module filter dam is arranged between the curtain purification tank, the aeration biological tank and the ecological purification tank, the curtain purification tank, the aeration biological tank and the ecological purification tank are connected through the slot-in module filter dam, and a water outlet is arranged on the ecological purification tank. The seawater aquaculture tail water in-situ purification treatment system of the application adopts a multi-processing unit combined processing mode to process seawater aquaculture tail water, the initial filter tank removes most of the large particles through physical filtration to reduce the processing load of the subsequent processing units; the buffer tank adjusts water quality (such as pH) and water volume, which helps to improve the tail water treatment effect and ensure that the subsequent processing units operate under the best conditions; the curtain purification tank is provided with curtain (curtain type) fillers, the curtain type fillers can not only intercept fine suspended solids and reduce water turbidity, but also play the role of vegetation by the biological membrane and attachments on the curtain fillers, effectively filtering out coagulated granular blue-green algae, thereby achieving the effect of isolating blue-green algae and avoiding the subsequent entry of blue-green algae into the slot-in module filter dam to cause the blockage of the slot-in module filter dam; the aeration biological tank mainly utilizes microorganisms on the fillers to decompose and remove organic matter in the tail water, and the aeration biological tank can adopt a conventional aeration biological tank in the art; the ecological purification tank can be provided with ecological floating beds, planted with various aquatic plants, cultured with filter-feeding fish and benthic organisms such as snails and mussels, and comprehensively utilizes plants and animals to degrade nutrients such as total nitrogen and total phosphorus, and improves the dissolved oxygen, and the ecological purification tank can adopt a conventional ecological purification tank in the art.

[0006] As a preferred, the initial filter tank comprises an initial filter tank body, a water distribution tank and a filter plate are arranged in the initial filter tank body, the filter plate is arranged obliquely, the filter plate is provided with filter holes, the filter plate divides the initial filter tank body into an upper water inlet area and a lower filter-out area, the water distribution tank is located in the water inlet area, a water distribution opening is arranged on the bottom of the water distribution tank, one end of the filter plate which is higher is located below the water distribution opening, and a sludge collection tank is connected to the other end of the filter plate which is lower. The inclined pipe and inclined plate structure in the conventional inclined pipe (inclined plate) sedimentation tank will hinder the sliding of sludge, which makes it difficult to discharge sludge and easily causes blockage between the inclined pipes (inclined plates), thereby affecting the normal operation and sedimentation effect of the sedimentation tank; the pool type of the initial filter tank is optimized and improved in the application, water is supplied from the top, the intercepted substances (sludge) on the filter plate are directly flushed into the sludge collection tank after the water is filtered by the filter plate, and the filtered water is discharged after entering the filter-out area; the filter plate is arranged obliquely, the intercepted substances on the filter plate can smoothly slide into the sludge collection tank under the action of water flow, and will not accumulate to block the filter holes, thereby affecting the normal operation and filtration effect of the initial filter tank.

[0007] As a preferred, the filter plate is a V-shaped wave plate.

[0008] As preferred, the buffer tank comprises a buffer tank body, and perforated flower walls are arranged in the buffer tank body along the length of the tank, and water passing holes are arranged on the perforated flower walls. The perforated flower walls can stabilize the flow rate and make the water body mixing more uniform, so as to make the water quality more stable.

[0009] As preferred, the water passing holes are arranged obliquely, and the water inlet end of the water passing hole is the low end, and the water outlet end of the water passing hole is the high end. The oblique arrangement of the water passing hole can also play a certain sedimentation role.

[0010] As preferred, the sedimentation tank comprises a sedimentation tank body, and a plurality of through sedimentation cylinders are arranged in the sedimentation tank body from top to bottom, and the gaps between the sedimentation cylinders form sedimentation channels, and a separation edge is arranged between the lower edge of the uppermost sedimentation cylinder and the sedimentation tank body, and the uppermost sedimentation cylinder, the separation edge and the sedimentation tank body jointly form a water outlet groove. In the present application, the tail water rises along the sedimentation cylinder, and the small particles continuously collide in the sedimentation cylinder and the sedimentation channel to form large particles and then settle, which is beneficial to improve the sedimentation effect, and the sedimentation cylinder is not easy to be blocked, and the sludge is smoothly discharged; the water in the water outlet groove is discharged through a pipeline.

[0011] As preferred, a flow blocking cylinder is arranged in the sedimentation tank body, the large end of the flow blocking cylinder faces upward, and a gap is arranged between the flow blocking cylinder and the lowermost sedimentation cylinder, and the gap forms a sedimentation port. The flow blocking cylinder avoids blocking and guiding the water inlet, so that the tail water can enter the sedimentation cylinder.

[0012] As preferred, a sludge collecting hopper is arranged at the bottom of the sedimentation tank body, and a sludge guiding part is arranged at the corner position of the bottom of the sedimentation tank body. The sludge guiding part has an inclined surface, which helps the sludge smoothly slide into the sludge collecting hopper without accumulation.

[0013] As preferred, the curtain purification tank comprises a curtain purification tank body, curtain type fillers are arranged in the curtain purification tank body at intervals along the water flow direction, and the upper and lower ends of the curtain type fillers are respectively fixed on fixed rods, and a counterweight is connected to the lower fixed rod.

[0014] As preferred, the embedded slot type module filter dam comprises a dam foundation, front and rear water distribution walls are arranged on the dam foundation, a water inlet hole is arranged on the front water distribution wall, the water inlet hole is arranged obliquely, the water inlet end of the water inlet hole is the low end, and the water outlet end of the water inlet hole is the high end, a water outlet hole is arranged on the rear water distribution wall, the water outlet hole is arranged obliquely, the water inlet end of the water outlet hole is the high end, and the water outlet end of the water outlet hole is the low end, a filter module is arranged between the front water distribution wall and the rear water distribution wall, and the filter module comprises an outer frame and filter material filled in the outer frame. The oblique arrangement of the water inlet hole on the front water distribution wall can effectively prevent impurities from entering and is not easy to be blocked; the oblique arrangement of the water outlet hole on the rear water distribution wall can smoothly discharge water and is not easy to backflow; the filter dam adopts modular design, is convenient to install, can be installed and combined according to different situations (height or width), and the filter material can be selected as needed.

[0015] Therefore, the present application has the following beneficial effects: the seawater aquaculture tail water is treated by the multiple treatment units of the primary filter tank, the buffer tank, the sedimentation tank, the curtain purification tank, the aeration biological tank and the ecological purification tank, the particulate matters and the nitrogen and phosphorus nutrients in the tail water can be effectively removed, the treatment unit is not easy to be blocked, the operation is stable, the treatment capacity is large and the treatment cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the connection diagram of the present application.

[0017] Figure 2 is the structural diagram of the primary filter tank.

[0018] Figure 3 is the structural diagram of the buffer tank.

[0019] Figure 4 is the structural diagram of the curtain purification tank.

[0020] Figure 5 is the installation diagram of the curtain filler 34.

[0021] Figure 6 is the structural diagram of the aeration biological tank.

[0022] Figure 7 is the cross-sectional view of the filter dam.

[0023] In the drawing: the primary filter tank 1, the buffer tank 2, the sedimentation tank 3, the curtain purification tank 4, the aeration biological tank 5, the ecological purification tank 6, the water inlet 7, the embedded groove type module filter dam 8, the water outlet 9, the primary filter tank body 10, the water distribution tank 11, the filter plate 12, the filter hole 13, the water inlet area 14, the filtered area 15, the water distribution port 16, the sewage collection tank 17, the buffer tank body 18, the perforated flower wall 19, the water passage hole 20, the sedimentation tank body 21, the sedimentation cylinder 22, the sedimentation channel 23, the isolation edge 24, the water outlet tank 25, the flow blocking cylinder 26, the sedimentation port 27, the sludge collecting hopper 28, the sludge guiding part 29, the curtain purification tank body 30, the curtain filler 31, the fixing rod 32, the counterweight 33, the dam foundation 34, the front water distribution wall 35, the rear water distribution wall 36, the water inlet hole 37, the water outlet hole 38, the outer frame 39, the filter material 40. DETAILED DESCRIPTION

[0024] The present application will be further described below in combination with the drawings and specific embodiments.

[0025] As Figure 1The in-situ purification treatment system for marine aquaculture tail water shown in the figure comprises a primary filter 1, a buffer tank 2, a sedimentation tank 3, a curtain purification tank 4, an aerated biological tank 5 and an ecological purification tank 6 connected in sequence. The primary filter is provided with a water inlet 7. The primary filter, the buffer tank, the sedimentation tank and the curtain purification tank are connected by pipelines. An embedded slot module filter dam 8 is provided between the curtain purification tank, the aerated biological tank and the ecological purification tank. The curtain purification tank, the aerated biological tank and the ecological purification tank are connected by an embedded slot module filter dam. The ecological purification tank is provided with a water outlet 9. The primary filter (such as Figure 2 As shown) includes a primary filter body 10, a water distribution tank 11 and a filter plate 12 are provided in the primary filter body, the filter plate is a V-shaped corrugated plate, the filter plate is inclined, and a filter hole 13 is provided on the filter plate. The filter plate divides the primary filter body into two upper and lower areas, an inlet area 14 and a filter area 15. The water distribution tank is located in the water inlet area, and a water distribution port 16 is provided at the bottom of the water distribution tank. The higher end of the filter plate is located below the water distribution port, and the lower end of the filter plate is connected to a sewage collecting tank 17; the buffer tank includes a buffer tank body 18 (as shown Figure 3 As shown), a perforated wall 19 is provided along the length of the buffer tank, and a water hole 20 is provided on the perforated wall. The water hole is inclined, and the end of the water hole where water enters is the lower end, and the end where water exits is the higher end; a sedimentation tank (such as Figure 4 As shown) includes a sedimentation tank body 21, in which a plurality of through-sedimentation cylinders 22 are provided from top to bottom, and the gaps between the sedimentation cylinders form a sedimentation channel 23, wherein an isolation edge 24 is provided between the lower edge of the uppermost sedimentation cylinder and the sedimentation tank body, and an outlet trough 25 is formed between the uppermost sedimentation cylinder, the isolation edge and the sedimentation tank body, and a baffle cylinder 26 is provided in the sedimentation tank body, the large mouth end of the baffle cylinder facing upward, and a gap is provided between the baffle cylinder and the sedimentation cylinder located at the bottom, and the gap forms a sedimentation port 27, a mud collecting hopper 28 is provided at the bottom of the sedimentation tank body, and a mud guide portion 29 is provided at the bottom corner position of the sedimentation tank body; the curtain purification tank includes a curtain purification tank body 30 (as shown) Figure 5 As shown in FIG), curtain-type fillers 31 (such as Figure 6 As shown), the upper and lower ends of the curtain type filler are respectively fixed on the fixed rod 32, and the fixed rod at the bottom is connected with a counterweight block 33; the embedded groove module filter dam (as Figure 7 3. The dam foundation 34 includes a front water distribution wall 35 and a rear water distribution wall 36 on the front and rear sides of the dam foundation. The front water distribution wall is provided with a water inlet 37, which is inclined, with the end of the water inlet being the low end and the end of the water inlet being the high end. The rear water distribution wall is provided with a water outlet 38, which is inclined, with the end of the water outlet being the high end and the end of the water outlet being the low end. A filter module is provided between the front water distribution wall and the rear water distribution wall. The filter module includes an outer frame 39 and filter material 40 filled in the outer frame.

[0026] The operation principle of the application is that the mariculture tail water enters the distribution tank in the primary filter tank through the water inlet, evenly falls on the filter plate through the water distribution port, and flows along the filter plate to the sludge collecting tank, the filtered sludge slides into the sludge collecting tank, and the falling tail water is discharged into the buffer tank after entering the filter-out area; the water entering the buffer tank passes through the perforated flower wall, is mixed uniformly, and is discharged into the sedimentation tank; the tail water in the sedimentation tank is settled for multiple times through the settling cylinder, the large particles formed are sunk to the sludge collecting hopper for collection and discharge, and the tail water is discharged into the water outlet tank and then into the curtain purification tank, the tail water is removed and purified through the curtain purification tank, enters the aeration biological tank through the embedded groove type module filter dam, decomposes and removes most of the organic matters in the tail water, filters out the fine suspended matters and the condensed granular blue-green algae, enters the aeration biological tank through the embedded groove type module filter dam, decomposes and removes the organic matters in the tail water, enters the ecological purification tank, uses the plants and animals to degrade the total nitrogen and total phosphorus and other nutrient elements in all directions, and after disinfection, can be reused.

[0027] The above-described embodiment is only a preferred scheme of the application, and does not limit the application in any form, and there are other variants and modifications without exceeding the technical scheme recorded in the claims.

Claims

1. A system for in-situ purification of marine aquaculture effluent, characterized by, The utility model provides a water purification system, including the primary filter pool (1) that connects in turn, buffer pool (2), sedimentation tank (3), curtain purification pool (4), aeration biological pool (5) and ecological purification pool (6), be equipped with water inlet (7) on the primary filter pool, and the primary filter pool, buffer pool, sedimentation tank, curtain purification pool are connected through the pipeline between, be equipped with the embedded groove type module filter dam (8) between curtain purification pool, aeration biological pool and ecological purification pool, and curtain purification pool, aeration biological pool and ecological purification pool are connected through embedded groove type module filter dam, be equipped with water outlet (9) on ecological purification pool, embedded groove type module filter dam includes dam foundation (34), be equipped with front water distribution wall (35) and rear water distribution wall (36) on the dam foundation's two sides, be equipped with water inlet hole (37) on the front water distribution wall, the water inlet hole is obliquely arranged, and the one end of water inlet hole is low, and the one end of water outlet of water inlet hole is high, be equipped with water outlet hole (38) on the rear water distribution wall, the water outlet hole is obliquely arranged, and the one end of water inlet hole is high, and the one end of water outlet hole is low, and be equipped with filter module between front water distribution wall and rear water distribution wall, filter module includes outer frame (39) and filter material (40) filled in outer frame.

2. The system according to claim 1, wherein The primary filter pool includes a primary filter pool body (10), a water distribution groove (11) and a filter plate (12) are arranged in the primary filter pool body, the filter plate is obliquely arranged, the filter plate is provided with filter holes (13), the filter plate divides the primary filter pool body into an upper region and a lower region, the water distribution groove is located in the upper region, a water distribution opening (16) is arranged on the bottom of the water distribution groove, one end of the filter plate is located below the water distribution opening, and the other end of the filter plate is connected with a sludge collecting groove (17).

3. The system according to claim 2, wherein the system is characterized by, The filter plate is a V-shaped wave plate.

4. The system according to claim 1, wherein the system is characterized by: The buffer pool includes a buffer pool body (18), a perforated flower wall (19) is arranged in the buffer pool body along the length of the buffer pool body, and the perforated flower wall is provided with water passing holes (20).

5. The system according to claim 4, wherein the system is characterized by: The water passing holes are obliquely arranged, one end of the water passing holes is low, and the other end of the water passing holes is high.

6. The system according to claim 1, wherein The sedimentation tank includes a sedimentation tank body (21), a plurality of through sedimentation cylinders (22) are arranged in the sedimentation tank body from top to bottom, the gaps between the sedimentation cylinders form sedimentation channels (23), a separation edge (24) is arranged between the lower edge of the uppermost sedimentation cylinder and the sedimentation tank body, and the uppermost sedimentation cylinder, the separation edge and the sedimentation tank body jointly form a water outlet groove (25).

7. The system according to claim 6, wherein the system is characterized by: A flow blocking cylinder (26) is arranged in the sedimentation tank body, the large end of the flow blocking cylinder faces upward, a gap is arranged between the flow blocking cylinder and the lowermost sedimentation cylinder, and the gap forms a sedimentation port (27).

8. The system according to claim 6, wherein the system is characterized by: A sludge collecting hopper (28) is arranged at the bottom of the sedimentation tank body, and a sludge guiding part (29) is arranged at the corner of the bottom of the sedimentation tank body.

9. The system according to claim 1, wherein The curtain purification pool includes a curtain purification pool body (30), curtain type fillers (31) are arranged in the curtain purification pool body in a spaced manner along the water flow direction, the upper end and the lower end of the curtain type fillers are respectively fixed on fixed rods (32), and a counterweight (33) is connected to the lower fixed rod.

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