An oxygen denitrification treatment device for aquaculture water

Abstract

This utility model discloses an oxygen denitrification treatment device for aquaculture water, including a treatment tank. The treatment tank is equipped with a filtration zone, an aerobic biological zone, an anoxic biological zone, and a degassing zone. The filtration zone is filled with quartz sand filter media. The aerobic biological zone contains biological packing material and has a jet aeration ring on its outer wall, which is connected to an ozone-oxygen mixture generator. The anoxic biological zone is filled with porous ceramsite packing material. The degassing zone has a guide plate inside. In this utility model, the aquaculture water can be filtered for suspended particulate matter through the quartz sand filter media. The jet aeration ring can introduce ozone-oxygen mixture gas, which, together with the honeycomb biological packing material, can complete ammonia nitrogen oxidation. The denitrifying bacteria on the surface of the porous ceramsite packing material can convert nitrates into nitrogen gas. Finally, the gas is separated by the guide plate, and the purified water can be discharged from the outlet. Thus, through the above structure, efficient denitrification, oxygenation, and purification of aquaculture water can be achieved, improving water quality treatment efficiency and stability.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture water treatment technology, specifically to an oxygen denitrification treatment device for aquaculture water. Background Technology

[0002] In aquaculture, the accumulation of nitrogen in the water (such as ammonia nitrogen and nitrite produced by the decomposition of uneaten feed and excrement) is a key factor restricting the stocking density and the quality of aquatic products. Excessive nitrogen can lead to fish poisoning, decreased immunity, and even death. At the same time, insufficient dissolved oxygen in the water will exacerbate the reproduction of anaerobic microorganisms and further deteriorate the water quality.

[0003] Existing aquaculture water treatment equipment has the following shortcomings:

[0004] Single function: Oxygenation equipment can only increase dissolved oxygen and cannot remove nitrogen; denitrification equipment requires an additional oxygenation device, resulting in low system integration.

[0005] Low nitrogen removal efficiency: Traditional biological nitrogen removal relies on natural microbial communities, which have a slow reaction rate and are difficult to cope with the nitrogen load of high-density aquaculture.

[0006] High energy consumption: Some denitrification devices use forced aeration or circulating pumps, which have high operating costs and are not suitable for small and medium-sized farms;

[0007] Therefore, it is necessary to design an oxygen denitrification treatment device for aquaculture water to solve the above problems. Utility Model Content

[0008] The purpose of this invention is to provide an oxygen denitrification treatment device for aquaculture water to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: an oxygen denitrification treatment device for aquaculture water, comprising a treatment tank, the bottom of which is provided with four sets of support legs, and a tank cover installed on the top. The bottom of the treatment tank is provided with a water inlet, and the top of the tank cover is provided with a water outlet. The interior of the treatment tank is provided with a filtration zone, an aerobic biological zone, an anoxic biological zone, and a degassing zone in sequence along the water flow direction. The filtration zone is filled with quartz sand filter media. The aerobic biological zone is provided with honeycomb-shaped biological packing material with nitrifying bacteria attached to its surface. An annular jet aeration ring is provided at a corresponding position on the outer wall. The jet aeration ring is connected to an ozone-oxygen mixture generator. A controller is installed on the top of the ozone-oxygen mixture generator. The anoxic biological zone is filled with porous ceramic packing material loaded with denitrifying bacteria. The degassing zone is provided with a spiral guide plate, which is fixed to the inner wall of the treatment tank.

[0010] Preferably, the jet aeration ring is connected to the interior of the treatment tank through multiple sets of branch pipes, and the outlet end of the branch pipe is provided with a jet nozzle.

[0011] Preferably, a dissolved oxygen sensor and an ammonia nitrogen sensor are installed on the side wall of the treatment tank between the aerobic biological zone and the anoxic biological zone.

[0012] Preferably, the dissolved oxygen sensor and the ammonia nitrogen sensor are electrically connected to the controller, and the controller is linked to the ozone-oxygen mixture generator.

[0013] Preferably, the filtration zone, aerobic biological zone, and anoxic biological zone are all equipped with sealable inspection doors near the top, and the bottom of the aerobic biological zone, anoxic biological zone, and degassing zone is equipped with water-permeable partitions.

[0014] Preferably, the bottom of the treatment tank is provided with a drain port, and the top of the tank cover is provided with an exhaust valve.

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

[0016] 1. This utility model uses quartz sand filter media in the filtration zone to remove suspended particulate matter from aquaculture water. Subsequently, under the action of ozone-oxygen mixed gas provided by an ozone-oxygen generator introduced through the jet aeration ring, the dissolved oxygen content of the water increases. Nitrifying bacteria on the surface of the honeycomb biological packing can convert ammonia nitrogen into nitrate, while ozone can initially decompose organic nitrogen. Then, the water flows up to the anoxic biological zone, where denitrifying bacteria on the surface of the porous ceramic packing can reduce nitrate to nitrogen gas in an oxic environment. Finally, the water flows into the degassing zone, where a spiral guide plate can guide the formation of a spiral flow, causing undissolved nitrogen and other gases in the water to separate and float to the surface. The purified water is discharged from the outlet. Thus, through the above structure, efficient denitrification, oxygenation, and purification of aquaculture water can be achieved, improving water treatment efficiency and stability, and making it suitable for various aquaculture scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a bottom view of the present invention;

[0019] Figure 3 This is a side view and a top view of the present invention;

[0020] Figure 4 This is a side sectional view of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of part A in the image.

[0022] In the diagram: 1. Treatment tank, 2. Support leg, 3. Inlet, 4. Drain, 5. Tank cover, 6. Outlet, 7. Exhaust valve, 8. Filtration zone, 9. Aerobic biological zone, 10. Anoxic biological zone, 11. Degassing zone, 12. Baffle, 13. Quartz sand filter media, 14. Biological packing, 15. Porous ceramsite packing, 16. Guide plate, 17. Inspection door, 18. Jet aeration ring, 19. Main pipe, 20. Ozone-oxygen mixture generator, 21. Branch pipe, 22. Jet nozzle, 23. Controller, 24. Dissolved oxygen sensor, 25. Ammonia nitrogen sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please refer to Figure 1-5 As shown, this utility model provides an oxygen denitrification treatment device for aquaculture water, including a treatment tank 1. The bottom of the treatment tank 1 is provided with four sets of support legs 2, and the top is equipped with a tank cover 5. The bottom of the treatment tank 1 is provided with a water inlet 3, and the top of the tank cover 5 is provided with a water outlet 6. The inside of the treatment tank 1 is provided with a filtration zone 8, an aerobic biological zone 9, an anoxic biological zone 10 and a degassing zone 11 in sequence along the water flow direction. The filtration zone 8 is filled with quartz sand filter media 13. The aerobic biological zone 9 is provided with a honeycomb biological packing material 14 with nitrifying bacteria attached to its surface. The outer wall is provided with an annular jet aeration ring 18. The jet aeration ring 18 is connected to an ozone-oxygen mixture generator 20. The top of the ozone-oxygen mixture generator 20 is equipped with a controller 23. The anoxic biological zone 10 is filled with porous ceramic packing material 15 loaded with denitrifying bacteria. The degassing zone 11 is provided with a spiral guide plate 16, which is fixed to the inner wall of the treatment tank 1.

[0026] Specifically, the aquaculture water enters through inlet 3, flows through filtration zone 8, and is filtered by quartz sand filter media 13 to remove suspended particles before entering aerobic biological zone 9. Under the action of ozone-oxygen mixed gas provided by ozone-oxygen generator 20 through annular jet aeration ring 18, the dissolved oxygen content of the water increases. Nitrifying bacteria on the surface of honeycomb biological packing 14 can convert ammonia nitrogen into nitrate, while ozone can initially decompose organic nitrogen. Then the water flows up to anoxic biological zone 10, where denitrifying bacteria on the surface of porous ceramic packing 15 can reduce nitrate to nitrogen gas in an oxic environment. Finally, the water flows into degassing zone 11, where it is guided by spiral guide plate 16 to form a spiral flow, causing undissolved nitrogen and other gases in the water to separate and float to the surface. The purified water is discharged from outlet 6. Thus, through the above structure, efficient denitrification, oxygenation and purification of aquaculture water can be achieved, improving water treatment efficiency and stability, and making it suitable for various aquaculture scenarios.

[0027] The jet aeration ring 18 is connected to the interior of the treatment tank 1 through multiple sets of branch pipes 21. The outlet end of the branch pipes 21 is equipped with a jet nozzle 22. The mixed gas generated by the ozone-oxygen generator 20 is distributed to the multiple sets of branch pipes 21 through the jet aeration ring 18. The gas is then injected at high speed into the aerobic biological zone 9 through the jet nozzle 22 at the outlet end of the branch pipes 21. This generates a large number of microbubbles that mix thoroughly with the water, which not only increases the dissolved oxygen content of the water to meet the activity requirements of nitrifying bacteria, but also enhances the water flow disturbance through the jet impact force, allowing the mixed gas to fully contact the bacteria on the surface of the honeycomb biological packing 14. This strengthens the efficiency of ozone in decomposing organic nitrogen and converting ammonia nitrogen to nitrate. Thus, by setting up the system, the dissolved oxygen content can be efficiently increased and the denitrification reaction can be strengthened, thereby improving the treatment efficiency of the aerobic biological zone 9.

[0028] The treatment tank 1 has a dissolved oxygen sensor 24 and an ammonia nitrogen sensor 25 installed on its side wall between the aerobic biological zone 9 and the anoxic biological zone 10. The dissolved oxygen sensor 24 and the ammonia nitrogen sensor 25 are electrically connected to the controller 23. The controller 23 is linked with the ozone-oxygen generator 20. The dissolved oxygen sensor 24 and the ammonia nitrogen sensor 25 can monitor the dissolved oxygen concentration and ammonia nitrogen residue in the water after treatment in the aerobic biological zone 9 in real time and transmit the data to the controller 23. The controller 23 can automatically adjust the mixed gas output and ozone concentration of the ozone-oxygen generator 20 according to the preset threshold to ensure that the dissolved oxygen level in the aerobic biological zone 9 is suitable for the activity of nitrifying bacteria, while ensuring stable ammonia nitrogen removal effect. This provides suitable nitrate substrate for the subsequent denitrification reaction in the anoxic biological zone 10, thereby improving the automation level and treatment efficiency of the device.

[0029] Among them, the filtration zone 8, the aerobic biological zone 9, and the anoxic biological zone 10 are all equipped with sealable inspection doors 17 near the top. The bottom of the aerobic biological zone 9, the anoxic biological zone 10, and the degassing zone 11 are all equipped with water-permeable partitions 12. The inspection doors 17 facilitate the filling, replacement, and maintenance of the packing materials in each functional zone. The water-permeable partitions 12 can separate different areas to prevent the packing materials from mixing, and can also ensure smooth water flow, taking into account both maintenance convenience and water flow stability.

[0030] The bottom of the treatment tank 1 is equipped with a drain port 4, and the top of the tank cover 5 is equipped with an exhaust valve 7. The drain port 4 can discharge the impurities deposited at the bottom of the treatment tank 1 in a timely manner, and the exhaust valve 7 can smoothly release the gas separated from the degassing zone 11, avoiding impurity blockage and gas retention that affect the treatment effect, and improving the operational stability and maintenance convenience of the device.

[0031] Working principle: First, the aquaculture water enters through inlet 3, flows through filtration zone 8, and is filtered by quartz sand filter media 13 to remove suspended particles. Then, it enters aerobic biological zone 9 through permeable baffle 12. The mixed gas generated by ozone-oxygen generator 20 is distributed to multiple branch pipes 21 through annular jet aeration ring 18. The gas is then injected at high speed into aerobic biological zone 9 through jet nozzles 22 at the outlet of branch pipes 21. It interacts with nitrifying bacteria on the surface of honeycomb biological packing 14, converting ammonia nitrogen into nitrate. Ozone can also preliminarily decompose organic nitrogen. The treated water rises through the bottom permeable baffle 12. In the anoxic biological zone 10, denitrifying bacteria on the surface of the porous ceramsite packing 15 can reduce nitrates to nitrogen. Then, the water flows through the bottom permeable baffle 12 into the degassing zone 11. Under the guidance of the spiral guide plate 16, a spiral flow is formed, which separates undissolved nitrogen and other gases and causes them to float to the surface. The water is then discharged through the exhaust valve 7, and the purified water is discharged from the outlet 6. During the process, the dissolved oxygen sensor 24 and the ammonia nitrogen sensor 25 can monitor the data in real time and transmit it to the controller 23. The controller 23 can adjust the operating parameters of the ozone-oxygen mixture generator 20 in a coordinated manner, thereby completing the entire operation process.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oxygen denitrification treatment device for fishery culture water, comprising a treatment tank (1), the bottom of the treatment tank (1) is provided with four groups of supporting legs (2), and the top is provided with a tank cover (5), characterized in that: The bottom of the treatment tank (1) is provided with an inlet (3), and the top of the tank cover (5) is provided with an outlet (6). The inside of the treatment tank (1) is provided with a filtration zone (8), an aerobic biological zone (9), an anoxic biological zone (10) and a degassing zone (11) in sequence along the water flow direction. The filtration zone (8) is filled with quartz sand filter media (13). The aerobic biological zone (9) is provided with honeycomb biological packing material (14) with nitrifying bacteria attached to its surface. The outer wall is provided with an annular jet aeration ring (18) at the corresponding position. The jet aeration ring (18) is connected to an ozone-oxygen mixture generator (20). The top of the ozone-oxygen mixture generator (20) is equipped with a controller (23). The anoxic biological zone (10) is filled with porous ceramic packing material (15) loaded with denitrifying bacteria. The degassing zone (11) is provided with a spiral guide plate (16) which is fixed to the inner wall of the treatment tank (1).

2. The oxygen denitrification treatment device for aquaculture water according to claim 1, characterized in that: The jet aeration ring (18) is connected to the interior of the treatment tank (1) through multiple sets of branch pipes (21), and the outlet end of the branch pipe (21) is provided with a jet nozzle (22).

3. The device for oxygen denitrification treatment of fishery culture water according to claim 2, characterized in that: A dissolved oxygen sensor (24) and an ammonia nitrogen sensor (25) are installed on the side wall of the treatment tank (1) between the aerobic biological zone (9) and the anoxic biological zone (10).

4. The device for oxygen denitrification treatment of fishery culture water according to claim 3, characterized in that: The dissolved oxygen sensor (24) and the ammonia nitrogen sensor (25) are electrically connected to the controller (23), and the controller (23) is linked to the ozone-oxygen mixture generator (20).

5. The device for oxygen denitrification treatment of fishery culture water according to claim 1, characterized in that: The filtration zone (8), aerobic biological zone (9), and anoxic biological zone (10) are all equipped with sealable maintenance doors (17) near the top, and the bottom of the aerobic biological zone (9), anoxic biological zone (10), and degassing zone (11) are all equipped with water-permeable partitions (12).

6. The device for oxygen denitrification treatment of fishery culture water according to claim 5, characterized in that: The bottom of the treatment tank (1) is provided with a drain port (4), and the top of the tank cover (5) is provided with an exhaust valve (7).

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