In-situ purification treatment system for mariculture tail water

Abstract

The invention discloses a mariculture tail water in-situ purification treatment system which comprises a primary filter tank, a buffer tank, a sedimentation tank, a curtain purification tank, an aeration biological tank and an ecological purification tank which are sequentially connected, the primary filter tank is provided with a water inlet, and the primary filter tank, the buffer tank, the sedimentation tank and the curtain purification tank are connected through pipelines. Caulking groove type module filter dams are arranged among 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 communicated through the caulking groove type module filter dams, and a water outlet is formed in the ecological purification tank. The mariculture tail water is jointly treated by multiple treatment units including the primary filter tank, the buffer tank, the sedimentation tank, the curtain purification tank, the aeration biological tank and the ecological purification tank, particulate matters and nutrient elements such as nitrogen and phosphorus in the tail water can be effectively removed, and the system is not easy to block, stable in operation, large in treatment capacity and low in treatment cost.

Description

Technical Field

[0001] The invention relates to the technical field of seawater aquaculture tail water treatment, in particular to an in-situ purification treatment system for seawater aquaculture tail water. Background Art

[0002] In recent years, my country's marine aquaculture industry has been developing rapidly towards intensive development, but with the rapid development of marine aquaculture, the risk of environmental pollution has increased accordingly. Marine aquaculture tail water contains pollutants such as residual bait and animal excrement. If it is discharged without treatment, it will reduce the dissolved oxygen in the environmental water body, increase the content of ammonia nitrogen and nitrite nitrogen in the water, and breed bacteria and microorganisms in large quantities, causing eutrophication of the water body.

[0003] The Chinese patent application with application publication number CN113800648A and application publication date December 17, 2021 discloses an in-situ ecological treatment system and method for a marine aquaculture tailwater discharge ditch, wherein the in-situ ecological treatment system comprises 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 at positions adjacent to the slope protection on both sides of the discharge ditch; the composite biological purification filter bed is provided with 2 to 4 layers of filter bed matrix from the bottom of the water; the plug flow aeration device is hollow inside and is arranged 0.5 to 1 m below the water surface along the water flow direction; and salt-tolerant plants are planted on the ecological floating bed. The treatment system has the following defects: (1) it is easy to clog, has poor operating stability, and has a small treatment capacity; (2) it requires the addition of mineral water purifiers, and the treatment cost is high. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problems existing in the prior art in-situ ecological treatment system for seawater aquaculture tail water discharge ditch, and provides an in-situ purification treatment system for seawater aquaculture tail water which is not easy to be blocked, has stable operation, large processing capacity and low processing cost.

[0005] The invention discloses an in-situ purification treatment system for seawater aquaculture tail water, comprising a primary filter tank, a buffer tank, a sedimentation tank, a curtain purification tank, an aerated biological tank and an ecological purification tank which are connected in sequence, 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, an embedded groove module filter dam 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 through the embedded groove module filter dam, and the ecological purification tank is provided with a water outlet. The in-situ purification treatment system for seawater aquaculture tail water of the present invention adopts a multi-treatment unit joint treatment method to treat seawater aquaculture tail water. The primary filter tank removes most of the large particles by physical filtration to reduce the treatment load of the subsequent treatment unit; the buffer tank plays a role in adjusting the water quality (such as pH, etc.) and regulating the water volume, which helps to improve the treatment effect of the tail water and ensure that the subsequent treatment units operate under the best conditions; the curtain purification tank is provided with a curtain (curtain-type) filler, which can not only intercept fine suspended matter and reduce water turbidity, but also the biofilm and attachments attached to the curtain filler can also emit The vegetation effect is exerted to effectively filter out the condensed granular cyanobacteria, thereby achieving the effect of isolating cyanobacteria and preventing the cyanobacteria from subsequently entering the embedded trough module filter dam and causing blockage of the embedded trough module filter dam; the aerated biological pool mainly utilizes the microorganisms on the filler to decompose and remove organic matter in the tail water, and the aerated biological pool can adopt the conventional aerated biological pool in this field; the ecological purification pool can be equipped with ecological floating beds, various aquatic plants can be planted, filter-feeding fish and benthic organisms such as snails and clams can be cultured, and animals and plants can be used in all directions to degrade nutrients such as total nitrogen and total phosphorus, and increase dissolved oxygen. The ecological purification pool can adopt the conventional ecological purification pool in this field.

[0006] Preferably, the primary filter tank comprises a primary filter tank body, in which a water distribution trough and a filter plate are arranged, the filter plate is arranged obliquely, and filter holes are arranged on the filter plate, and the filter plate divides the primary filter tank body into two upper and lower areas, an inlet area and a filter area, the water distribution trough is located in the water inlet area, a water distribution port is arranged at the bottom of the water distribution trough, 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. The inclined tube and inclined plate structure in a conventional inclined tube (inclined plate) sedimentation tank will have a certain hindering effect on the sliding of sludge, resulting in the sludge being difficult to discharge and easily causing blockage between the inclined tubes (inclined plates), thus affecting the normal operation and sedimentation effect of the sedimentation tank; the present invention optimizes and improves the pool type of the primary filter tank, adopts an upper water inlet method, after the filter plate filters the incoming water, the intercepted material (sludge) on the filter plate is directly flushed into the sewage collection tank for discharge, and the filtered water enters the filter out area and is then discharged; the filter plate is arranged at an angle, and the intercepted material on the filter plate can slide smoothly into the sewage collection tank under the flushing action of the water flow, and will not accumulate and block the filter holes, thus affecting the normal operation and filtering effect of the primary filter tank.

[0007] Preferably, the filter plate is a V-shaped corrugated plate.

[0008] Preferably, the buffer tank comprises a buffer tank body, wherein a perforated wall is arranged along the length of the buffer tank body, and water holes are arranged on the perforated wall. The perforated wall can stabilize the flow rate, make the water body mix more evenly, and make the water quality more stable.

[0009] Preferably, the water hole is arranged obliquely, the end of the water hole for water inlet is the lower end, and the end of the water hole for water outlet is the higher end. The oblique arrangement of the water hole can also play a certain sedimentation role.

[0010] Preferably, the sedimentation tank includes a sedimentation tank body, wherein a plurality of through-going sedimentation cylinders are arranged in the sedimentation tank body from top to bottom, and the gaps between the sedimentation cylinders form a sedimentation channel, wherein an isolation edge is arranged between the lower edge of the sedimentation cylinder located at the top and the sedimentation tank body, and the sedimentation cylinder located at the top, the isolation edge and the sedimentation tank body together form a water outlet trough. In the present invention, the tail water rises along the sedimentation cylinder, and the tiny particles continuously collide in the sedimentation cylinder and the sedimentation channel to form large particles and settle, which is conducive to improving the sedimentation effect, the sedimentation cylinder is not easy to be blocked, and the mud discharge is smooth; the water in the water outlet trough is discharged through the pipeline.

[0011] Preferably, a baffle is provided in the sedimentation tank, the large opening of which faces upward, and a gap is provided between the baffle and the bottommost sedimentation cylinder, the gap forming a sedimentation port. The baffle avoids blocking and guiding the incoming water, so that the tail water can enter the sedimentation cylinder.

[0012] Preferably, a mud collecting bucket is provided at the bottom of the sedimentation tank body, and a mud guide is provided at the bottom corner of the sedimentation tank body. The mud guide has an inclined surface, which helps the mud to slide smoothly into the mud collecting bucket without accumulation.

[0013] Preferably, the curtain purification tank comprises a curtain purification tank body, in which curtain-type fillers are arranged 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 block is connected to the fixed rod located below.

[0014] Preferably, the embedded slot type module filter dam includes a dam foundation, and a front water distribution wall and a rear water distribution wall are arranged on the front and rear sides of the dam foundation. The front water distribution wall is provided with a water inlet hole, the water inlet hole is arranged obliquely, the end of the water inlet hole for water inlet is the low end, and the end of the water inlet hole for water outlet is the high end, and the rear water distribution wall is provided with a water outlet hole, the water outlet hole is arranged obliquely, the end of the water outlet hole for water inlet is the high end, and the end of the water outlet hole for water outlet is the low end, and a filter module is arranged between the front water distribution wall and the rear water distribution wall, and the filter module includes an outer frame and filter material filled in the outer frame. The water inlet hole on the front water distribution wall is arranged obliquely, which can effectively prevent impurities from entering and is not easy to be blocked; the water outlet hole on the rear water distribution wall is arranged obliquely, and the water outlet is smooth and not easy to flow back; the filter dam adopts a modular design, which is easy to install, and 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 invention has the following beneficial effects: multiple treatment units including a primary filtration tank, a buffer tank, a sedimentation tank, a curtain purification tank, an aerated biological tank and an ecological purification tank are used to jointly treat marine aquaculture tail water, which can effectively remove particulate matter and nutrients such as nitrogen and phosphorus in the tail water, and is not easy to clog, has stable operation, large processing capacity and low processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a connection diagram of the present invention.

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

[0018] Figure 3 It is a schematic diagram of the structure of the buffer pool.

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

[0020] Figure 5 It is a schematic diagram of the installation of the curtain type packing 34.

[0021] Figure 6 It is a structural diagram of an aerated biological pond.

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

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

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

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

[0026] The operating principle of the present invention is as follows: the tail water of seawater aquaculture enters the water distribution trough in the primary filter tank through the water inlet, falls evenly on the filter plate through the water distribution port, and flows along the filter plate to the sewage collection tank, the filtered sludge slides into the sewage collection tank, the fallen tail water enters the filtration area and is discharged into the buffer tank; the water entering the buffer tank passes through the perforated flower wall, is evenly mixed and then discharged into the sedimentation tank; the tail water in the sedimentation tank is precipitated multiple times through the sedimentation cylinder, the formed large particles sink to the sludge collecting bucket for collection and discharge, the tail water enters the water outlet trough and is discharged to the curtain purification tank, the tail water passes through the curtain purification tank, after being purified, enters the aerated biological pool through the embedded groove module filter dam, decomposes and removes most of the organic matter in the tail water and filters out fine suspended matter and condensed granular blue algae, enters the aerated biological pool through the embedded groove module filter dam, decomposes and removes the organic matter in the tail water and then enters the ecological purification pool, after fully utilizing animals and plants to degrade nutrient elements such as total nitrogen and total phosphorus, it can be reused after disinfection.

[0027] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. An in-situ purification system for marine aquaculture tail water, characterized in that: The invention comprises a primary filter tank (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) which are connected in sequence. The primary filter tank is provided with a water inlet (7). The primary filter tank, the buffer tank, the sedimentation tank and the curtain purification tank are connected by pipelines. An embedded groove-type 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 groove-type module filter dam. The ecological purification tank is provided with a water outlet (9).

2. The in-situ purification system for marine aquaculture tail water according to claim 1, characterized in that: The primary filter tank comprises a primary filter tank body (10), wherein a water distribution trough (11) and a filter plate (12) are arranged in the primary filter tank body, wherein the filter plate is arranged obliquely, and filter holes (13) are arranged on the filter plate, and the filter plate divides the primary filter tank body into two upper and lower areas, namely, a water inlet area (14) and a filter outlet area (15), wherein the water distribution trough is located in the water inlet area, and a water distribution port (16) is arranged at the bottom of the water distribution trough, wherein a higher end of the filter plate is located below the water distribution port, and a lower end of the filter plate is connected to a sewage collecting trough (17).

3. The in-situ purification system for seawater aquaculture tail water according to claim 2 is characterized in that: The filter plate is a V-shaped wave plate.

4. The in-situ purification system for marine aquaculture tail water according to claim 1, characterized in that: The buffer pool comprises a buffer pool body (18), wherein a perforated flower wall (19) is provided inside the buffer pool body along the length of the pool, and wherein the perforated flower wall is provided with a water hole (20).

5. The in-situ purification system for seawater aquaculture tail water according to claim 4, characterized in that: The water hole is arranged obliquely, the end of the water hole where water enters is the low end, and the end of the water hole where water exits is the high end.

6. The in-situ purification system for seawater aquaculture tail water according to claim 1, characterized in that: The sedimentation tank comprises a sedimentation tank body (21), wherein a plurality of through-going sedimentation cylinders (22) are arranged in the sedimentation tank body 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 sedimentation cylinder located at the top and the sedimentation tank body, and the sedimentation cylinder located at the top, the isolation edge and the sedimentation tank body together form a water outlet trough (25).

7. The in-situ purification system for seawater aquaculture tail water according to claim 6, characterized in that: A baffle cylinder (26) is provided in the sedimentation tank body, the large opening of the baffle cylinder faces upward, and a gap is provided between the baffle cylinder and the sedimentation cylinder located at the bottom, the gap forming a sedimentation port (27).

8. The in-situ purification system for seawater aquaculture tail water according to claim 6, characterized in that: A mud collecting bucket (28) is provided at the bottom of the sedimentation tank body, and a mud guide portion (29) is provided at a corner position of the bottom of the sedimentation tank body.

9. The in-situ purification system for marine aquaculture tail water according to claim 1, characterized in that: The curtain purification tank comprises a curtain purification tank body (30), wherein curtain-type fillers (31) are arranged at intervals in the curtain purification tank body along the water flow direction, wherein the upper and lower ends of the curtain-type fillers are respectively fixed to a fixing rod (32), and a counterweight block (33) is connected to the fixing rod located at the bottom.

10. The in-situ purification system for marine aquaculture tail water according to claim 1, characterized in that: The embedded slot type module filter dam comprises a dam foundation (34), a front water distribution wall (35) and a rear water distribution wall (36) are provided on the front and rear sides of the dam foundation, a water inlet hole (37) is provided on the front water distribution wall, the water inlet hole is arranged obliquely, the end of the water inlet hole for water inlet is the low end, and the end of the water inlet hole for water outlet is the high end, a water outlet hole (38) is provided on the rear water distribution wall, the water outlet hole is arranged obliquely, the end of the water outlet hole for water inlet is the high end, and the end of the water outlet hole for water outlet is the low end, a filter module is provided between the front water distribution wall and the rear water distribution wall, and the filter module comprises an outer frame (39) and filter material (40) filled in the outer frame.

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