Seawater treatment emergency equipment for land-based shrimp culture and circulating culture

Abstract

The utility model relates to land-based shrimp culture circulating culture seawater treatment emergency equipment which comprises a biochemical pool, an MBR membrane pool and a water producing pool, an outlet of the biochemical pool is communicated with the water producing pool through a seawater outlet pipeline, and a first ammonia nitrogen monitor and a first electric valve are arranged on the seawater outlet pipeline. The pipe section, located between the first ammonia nitrogen monitor and the first electric valve, of the seawater outlet pipeline is communicated with a water inlet of the MBR membrane pool through an emergency water inlet pipeline, a second electric valve is arranged on the emergency water inlet pipeline, a water outlet of the MBR membrane pool is communicated with the water producing pool through an emergency water outlet pipeline, and a self-priming pump is arranged on the emergency water outlet pipeline. And the bottom of the MBR membrane tank is connected with the sludge discharge assembly and the aeration assembly. The device has the advantages that the device is integrated, the device is simple, the technological process is short, and the occupied area is small; the automation degree is high, the reaction is rapid, full-automatic treatment can be achieved, and the labor cost is low; the treated effluent is stable in property and clear and transparent in water quality, and the ammonia nitrogen content is below 5ppm, so that the requirements of aquaculture water are completely met.

Description

Technical Field

[0001] This utility model belongs to the field of shrimp farming wastewater treatment technology, specifically relating to an emergency equipment for treating seawater in land-based shrimp farming recirculating aquaculture. Background Technology

[0002] The key technology in intensive shrimp recirculating aquaculture is the recycling of seawater. Currently, the conventional method is to remove ammonia nitrogen through biological treatment. However, the effluent quality is unstable during this process. Shrimp farming consumes a large amount of seawater, and biologically treated seawater circulates rapidly. Therefore, in practice, seawater is directly introduced into the shrimp ponds after biological treatment. However, if the biological treatment is unstable, substandard seawater may enter the ponds, potentially causing significant adverse effects on the aquaculture. Therefore, an emergency land-based shrimp recirculating aquaculture seawater treatment system is needed to ensure timely and effective treatment of the recirculated seawater even when the biologically treated effluent is substandard. Utility Model Content

[0003] This utility model provides an emergency treatment device for seawater in land-based shrimp farming and recycling, which aims to overcome the lack of emergency treatment equipment in the existing technology when the quality of the effluent from the biochemical treatment of recycled aquaculture seawater is substandard.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An emergency seawater treatment device for land-based shrimp recirculating aquaculture includes a biological tank, an MBR membrane tank, and a production water tank. The inlet of the biological tank is connected to the aquaculture tailwater conveying pipeline, and the outlet of the biological tank is connected to the production water tank through a seawater outlet pipeline. A first ammonia nitrogen monitor and a first electric valve are sequentially installed on the seawater outlet pipeline along the direction of water flow. The section of the seawater outlet pipeline between the first ammonia nitrogen monitor and the first electric valve is connected to the inlet of the MBR membrane tank through an emergency water inlet pipeline. A second electric valve is installed on the emergency water inlet pipeline. The outlet of the MBR membrane tank is connected to the production water tank through an emergency water outlet pipeline. A self-priming pump is installed on the emergency water outlet pipeline. The bottom of the MBR membrane tank is connected to a sludge discharge component and an aeration component. The production water tank is connected to the outlet of the MBR membrane tank through a backwashing component. The outlet of the production water tank is connected to the aquaculture water supply pipeline.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, the emergency water outlet pipe is equipped with a second ammonia nitrogen monitor and a zeolite filter on the side of the outlet of the self-priming pump, with the zeolite filter located between the self-priming pump and the second ammonia nitrogen monitor.

[0007] Furthermore, the backwashing assembly includes a backwashing pipe and a backwashing pump installed on the backwashing pipe. One end of the backwashing pipe is connected to the product water tank, and the other end is connected to the outlet of the MBR membrane tank.

[0008] Furthermore, a solenoid valve one is provided on the emergency water outlet pipe near the inlet end of the self-priming pump, and a solenoid valve two is provided on the backwash pipe on the side of the backwash pump outlet.

[0009] Furthermore, a pressure gauge is installed on the emergency water outlet pipe between the self-priming pump and the solenoid valve, and a pressure gauge is installed on the backwash pipe between the backwash pump and the solenoid valve.

[0010] Furthermore, the MBR membrane tank is equipped with an MBR filter membrane assembly.

[0011] Furthermore, the sludge discharge assembly includes a sludge discharge pipe, a sludge pump, and a plate and frame filter press. One end of the sludge discharge pipe is connected to the bottom sludge discharge port of the MBR membrane tank, and the other end is connected to the inlet of the sludge pump. The outlet of the sludge pump is connected to the feed port of the plate and frame filter press through a pipe.

[0012] Furthermore, the MBR membrane tank is provided with an activated carbon inlet.

[0013] Furthermore, the aeration assembly includes an aeration blower, a connecting hose, and an aerator. The aerator is located at the bottom of the MBR membrane tank and is connected to the air outlet of the aeration blower via the connecting hose.

[0014] Furthermore, the aerator includes aeration discs evenly distributed at the bottom of the MBR membrane tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The emergency seawater treatment equipment for land-based shrimp farming provided by this utility model can automatically monitor the ammonia nitrogen index of the biochemically treated water. When the biochemically treated water is found to be substandard, it is promptly introduced into the emergency water inlet pipe for filtration, aeration, and / or activated carbon adsorption treatment in an MBR membrane tank. This ensures that the treated water meets the standards before being supplied to the aquaculture ponds, guaranteeing a long-term, effective, and stable supply of compliant aquaculture seawater. The equipment adopts an integrated design, is simple in structure, has a short process flow, and occupies a small area. It has a high degree of automation, reacts rapidly, and can achieve fully automated treatment with low labor costs. The treated effluent is stable in properties, clear and transparent, with ammonia nitrogen below 5 ppm, fully meeting the requirements for aquaculture water. Attached Figure Description

[0017] Figure 1 A schematic diagram of an emergency seawater treatment device for land-based shrimp farming recirculation provided by this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Biological treatment tank; 2. MBR membrane tank; 3. Producing water tank; 4. Aquaculture wastewater delivery pipeline; 5. Seawater outlet pipeline; 6. First ammonia nitrogen monitor; 7. First electric valve; 8. Emergency water inlet pipeline; 9. Second electric valve; 10. Emergency water outlet pipeline; 11. Self-priming pump; 12. Aquaculture water supply pipeline; 13. Second ammonia nitrogen monitor; 14. Zeolite packing filter; 15. Backwash pipeline; 16. Backwash pump; 17. Solenoid valve one; 18. Solenoid valve two; 19. Pressure gauge one; 20. Pressure gauge two; 21. MBR filter membrane module; 22. Sludge pump; 23. Plate and frame filter press; 24. Aeration fan; 25. Connecting hose; 26. Aerator. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] In the description of this utility model, if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" are used to indicate the orientation or positional relationship, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figure 1 As shown, this utility model provides an emergency seawater treatment device for land-based shrimp recirculating aquaculture, which includes a biological treatment tank 1, an MBR membrane tank 2, and a production water tank 3. The inlet of the biological treatment tank 1 is connected to the aquaculture wastewater conveying pipe 4, and the outlet of the biological treatment tank 1 is connected to the production water tank 3 through a seawater outlet pipe 5. A first ammonia nitrogen monitor 6 and a first electric valve 7 are sequentially installed on the seawater outlet pipe 5 along the direction of water flow. The section of the seawater outlet pipe 5 between the first ammonia nitrogen monitor 6 and the first electric valve 7 is connected to... An emergency water inlet pipe 8 is connected to the inlet of the MBR membrane tank 2. A second electric valve 9 is installed on the emergency water inlet pipe 8. The outlet of the MBR membrane tank 2 is connected to the product water tank 3 through an emergency water outlet pipe 10. A self-priming pump 11 is installed on the emergency water outlet pipe 10. The bottom of the MBR membrane tank 2 is connected to the sludge discharge assembly and the aeration assembly. The product water tank 3 is connected to the outlet of the MBR membrane tank 2 through a backwashing assembly. The outlet of the product water tank 3 is connected to the aquaculture water supply pipe 12.

[0023] It should be noted that the aquaculture wastewater transport pipeline refers to the wastewater generated after aquaculture, which produces a large amount of waste and generally exceeds the ammonia nitrogen standard. The wastewater is sent to a biological treatment tank for biological treatment. Under normal circumstances, after biological treatment, it can meet the requirements for aquaculture and can be directly discharged into the production water tank and finally transported to the aquaculture tank through the aquaculture water supply pipeline. However, due to the instability of biological treatment in the biological treatment tank, occasionally the production water will not meet the standard. Therefore, this utility model uses a first ammonia nitrogen monitor to detect whether the biological production water meets the standard. If it meets the standard, it is directly discharged into the production water tank. If it does not meet the standard, the biological production water is controlled to enter the MBR membrane tank for further treatment such as filtration and aeration by opening and closing the first and second electric valves to ensure that it meets the standard before being discharged.

[0024] In one embodiment of the present invention, the emergency water outlet pipe 10 is further provided with a second ammonia nitrogen monitor 13 and a zeolite filter 14 on the side of the outlet of the self-priming pump 11, and the zeolite filter 14 is located between the self-priming pump 11 and the second ammonia nitrogen monitor 13.

[0025] In one embodiment of the present invention, the backwashing assembly includes a backwashing pipe 15 and a backwashing pump 16 disposed on the backwashing pipe 15. One end of the backwashing pipe 15 is connected to the product water tank 3, and the other end is connected to the outlet of the MBR membrane tank 2.

[0026] In one embodiment of this utility model, an electromagnetic valve 17 is provided on the emergency water outlet pipe 10 near the inlet end of the self-priming pump 11, and an electromagnetic valve 28 is provided on the backwash pipe 15 on the side of the outlet of the backwash pump 16.

[0027] In one embodiment of this utility model, a pressure gauge 19 is provided on the emergency water outlet pipe 10 between the self-priming pump 11 and the solenoid valve 17, and a pressure gauge 20 is provided on the backwash pipe 15 between the backwash pump 16 and the solenoid valve 18.

[0028] It should be noted that the self-priming pump and the backwash pump and their valves operate alternately. Effective backwashing can alleviate the problem of MBR membrane module blockage. Valves are installed on the pipeline to regulate the flow rate. The flow rate of the backwash pump should be 1.5 to 2 times that of the self-priming pump.

[0029] In one embodiment of this utility model, the MBR membrane tank 2 is provided with an MBR filter membrane assembly 21.

[0030] It should be noted that the MBR membrane module is an ultrafiltration membrane module. The operating pressure within the MBR membrane module is 0.01-0.1 MPa, achieved through negative pressure suction. The membrane in the MBR membrane module is an organic membrane, made of materials such as PVDF, PAN, or PS. In the ultrafiltration membrane sieving process, the pressure difference across the membrane serves as the driving force, and the ultrafiltration membrane acts as the filtration medium. Under a certain pressure, when the feed solution flows across the membrane surface, the numerous tiny micropores densely distributed on the ultrafiltration membrane surface allow only water and small molecules to pass through, becoming the permeate. Each meter of ultrafiltration membrane fiber wall contains approximately 6 billion micropores of 0.01 micrometers. These pores only allow water molecules, beneficial minerals, and trace elements in the water to pass through. Since the smallest bacteria are larger than 0.02 micrometers, bacteria, as well as colloids, rust, suspended solids, silt, and large organic molecules, which are much larger than bacteria, can all be retained by the ultrafiltration membrane.

[0031] In one embodiment of the present invention, the sludge discharge assembly includes a sludge discharge pipe, a sludge pump 22, and a plate and frame filter press 23. One end of the sludge discharge pipe is connected to the bottom sludge discharge port of the MBR membrane tank 2, and the other end is connected to the inlet of the sludge pump 22. The outlet of the sludge pump 22 is connected to the feed port of the plate and frame filter press 23 through a pipe.

[0032] It should be noted that the sludge pump filters the pollutants intercepted in the MBR membrane tank through a plate and frame filter press.

[0033] In one embodiment of this utility model, the MBR membrane tank 2 is provided with an activated carbon inlet.

[0034] In one embodiment of the present invention, the aeration assembly includes an aeration blower 24, a connecting hose 25, and an aerator 26. The aerator 26 is located at the bottom of the MBR membrane tank 2 and is connected to the air outlet of the aeration blower 24 through the connecting hose 25.

[0035] In one embodiment of the present invention, the aerator 26 includes aeration discs evenly distributed at the bottom of the MBR membrane tank 2.

[0036] It should be noted that the aeration rate at the bottom of the membrane tank should be 15-20 times the set water production rate to ensure the aeration effect.

[0037] When using the emergency equipment provided by this utility model for handling, the following methods shall be followed:

[0038] 1) The first ammonia nitrogen monitor 6 needs to monitor the ammonia nitrogen content of the effluent after biochemical treatment in real time. The emergency inlet pipe, emergency outlet pipe, MBR membrane tank and other emergency bypass components of the emergency equipment for seawater treatment in recirculating aquaculture are in standby mode.

[0039] 2) When the first ammonia nitrogen monitor 6 detects ammonia nitrogen greater than 5 ppm and remains in the unqualified range for 3 minutes, the first electric valve 7 on the seawater outlet pipe 5 after biochemical treatment will automatically close, and the second electric valve 9 will automatically open, and the emergency bypass component for the recirculating aquaculture seawater treatment will automatically open.

[0040] 3) Seawater enters the MBR membrane tank 2 through the pipe, and aeration begins uniformly at the bottom aeration components. Activated carbon is added at the activated carbon inlet of the MBR membrane tank by an activated carbon dosing device.

[0041] 4) The activated carbon in the MBR membrane tank is mixed evenly, and the self-priming pump starts to produce clean effluent. At this time, the pressure is controlled at 0.01MPa.

[0042] 5) The clean water treated by the MBR membrane tank is pumped through a pipeline and then passes through a zeolite filter to adsorb ammonia nitrogen. After passing the test by the online monitoring equipment (second ammonia nitrogen monitor), it enters the product water tank 3.

[0043] 6) After a period of operation, the clean water in the product water tank 3 can be used by the backwash pump to intermittently backwash the MBR membrane module to prevent the MBR membrane module from becoming clogged.

[0044] 7) A sludge pump is installed at the bottom of the MBR membrane tank to process the suspended solids concentrated to a certain degree using a plate and frame filter press.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A land-based shrimp farming recirculating mariculture seawater treatment emergency apparatus, characterized in that, It includes biochemical pool (1), MBR membrane pool (2) and water production pool (3), the inlet of the biochemical pool (1) is communicated with aquaculture tail water delivery pipeline (4), the outlet of the biochemical pool (1) is communicated with the water production pool (3) through seawater outlet pipeline (5), first ammonia nitrogen monitor (6) and first electric valve (7) are sequentially arranged on the seawater outlet pipeline (5) along the direction of water flow in pipe, the pipe section of the seawater outlet pipeline (5) between the first ammonia nitrogen monitor (6) and first electric valve (7) is communicated with the water inlet of the MBR membrane pool (2) through emergency water inlet pipeline (8), second electric valve (9) is arranged on the emergency water inlet pipeline (8), the water outlet of the MBR membrane pool (2) is communicated with the water production pool (3) through emergency water outlet pipeline (10), self-priming pump (11) is arranged on the emergency water outlet pipeline (10), the bottom of the MBR membrane pool (2) is connected with sludge discharge assembly and aeration assembly, the water outlet of the MBR membrane pool (2) is communicated with the water production pool (3) through backwashing assembly, the water outlet of the water production pool (3) is communicated with aquaculture water supply pipeline (12).

2. The land-based shrimp recirculating aquaculture sea water treatment emergency equipment according to claim 1, characterized in that, The emergency water outlet pipeline (10) is located on the water outlet side of the self-priming pump (11) and is further provided with second ammonia nitrogen monitor (13) and zeolite filler filter (14), and the zeolite filler filter (14) is located between the self-priming pump (11) and the second ammonia nitrogen monitor (13).

3. The emergency equipment for treating seawater in a land-based shrimp recirculating aquaculture system according to claim 1, wherein, The backwashing assembly comprises backwashing pipeline (15) and backwashing pump (16) arranged on the backwashing pipeline (15), one end of the backwashing pipeline (15) is communicated with the water production pool (3), and the other end is communicated with the water outlet of the MBR membrane pool (2).

4. The land-based shrimp recirculating aquaculture sea water treatment emergency equipment according to claim 3, characterized in that, The emergency water outlet pipeline (10) is provided with electromagnetic valve one (17) near the inlet end of the self-priming pump (11), and the backwashing pipeline (15) is provided with electromagnetic valve two (18) on the water outlet side of the backwashing pump (16).

5. The emergency equipment for treating seawater in a land-based shrimp recirculating culture system according to claim 4, wherein, The emergency water outlet pipeline (10) between the self-priming pump (11) and the electromagnetic valve one (17) is provided with pressure gauge one (19), and the backwashing pipeline (15) between the backwashing pump (16) and the electromagnetic valve two (18) is provided with pressure gauge two (20).

6. The land-based shrimp farming recirculating mariculture treatment emergency apparatus according to claim 1, wherein, The MBR membrane pool (2) is provided with MBR filter membrane group (21).

7. The emergency equipment for treating seawater in a land-based shrimp recirculating culture system according to claim 1, wherein, The sludge discharge assembly comprises sludge discharge pipe, sludge pump (22) and plate and frame filter press (23), one end of the sludge discharge pipe is communicated with the bottom sludge discharge port of the MBR membrane pool (2), the other end is connected with the inlet of the sludge pump (22), the outlet of the sludge pump (22) is communicated with the feed inlet of the plate and frame filter press (23) through a pipeline.

8. The land-based shrimp farming circulating seawater treatment emergency equipment according to claim 1, characterized in that, The MBR membrane pool (2) is provided with activated carbon inlet.

9. A land-based shrimp recirculating aquaculture sea water treatment emergency device according to any one of claims 1 to 8, characterized in that, The aeration assembly comprises aeration fan (24), connecting hose (25) and aerator (26), the aerator (26) is arranged at the bottom of the MBR membrane pool (2) and is communicated with the air outlet of the aeration fan (24) through the connecting hose (25).

10. The land-based shrimp recirculating aquaculture sea water treatment emergency apparatus according to claim 9, wherein, The aerator (26) includes an aerator disc uniformly distributed at the bottom of the MBR membrane tank (2).

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