Micro-power nitrogen removal tank

Abstract

The utility model discloses a micro-power nitrogen removal tank. The micro-power nitrogen removal tank comprises a first chamber, a second chamber, a fluid discharge channel and a gas supply unit, wherein the first chamber is used for reducing oxygen content; the second chamber is used for removing nitrogen; the first chamber is provided with a water inlet, the upper part of the first chamber is communicated with the upper part of the second chamber, and the lower part of the second chamber is communicated with the lower part of the fluid discharge channel; the gas supply unit is communicated with the lower part of the fluid discharge channel and is used for introducing gas into the fluid discharge channel; during application, aerobic bacteria can be added into the first chamber, and anaerobic bacteria can be added into the second chamber; sinking the micro-power nitrogen removal tank added with the strain into a sewage water body; the micro-power nitrogen removal tank disclosed by the utility model can realize flowing of an internal water body only under the action of airflow, is extremely low in energy consumption, and can assist in realizing removal of total nitrogen under the condition that the ecology of a natural water body is not changed.

Description

Technical Field

[0001] This utility model relates to the field of water treatment, and in particular to equipment for degrading total nitrogen in river and lake water, specifically a micro-powered nitrogen removal tank. Background Technology

[0002] Currently, relatively mature equipment and processes exist for treating COD (Chemical Oxygen Demand) and ammonia nitrogen in rivers, lakes, and reservoirs. However, effective targeted processes or equipment for total nitrogen removal still lack specific solutions. This is because total nitrogen removal requires a low dissolved oxygen environment (e.g., below 0.2 mg / L), where organic matter serves as a carbon source to provide energy, and specific microorganisms utilize anaerobic respiration to reduce nitrate nitrogen to nitrogen gas, which is then released into the air. However, dissolved oxygen concentrations in natural water bodies are generally high (usually above 3 mg / L), and there is a lack of carbon sources to provide energy. Therefore, the problem of total nitrogen removal in natural water bodies has remained largely unresolved. Utility Model Content

[0003] The purpose of this invention is to overcome one or more shortcomings in the prior art and provide a new micro-powered nitrification tank that can achieve internal water flow solely under the action of airflow, consumes very little energy, and can assist in the removal of total nitrogen without altering the natural aquatic ecosystem.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A micro-powered nitrogen removal tank, the micro-powered nitrogen removal tank comprising a first chamber for reducing oxygen content, a second chamber for nitrogen removal, a fluid discharge channel, and a gas supply unit;

[0006] The first chamber is provided with a water inlet, the upper part of the first chamber is connected to the upper part of the second chamber, and the lower part of the second chamber is connected to the lower part of the fluid discharge channel;

[0007] The gas supply unit is connected to the lower part of the fluid discharge channel and is used to introduce gas into the fluid discharge channel.

[0008] According to some preferred aspects of the present invention, the fluid discharge channel is disposed inside the second chamber, and the lower part of the fluid discharge channel is connected to the bottom of the interior of the second chamber, the upper part of the fluid discharge channel extends out from the second chamber, and the gas supply unit is connected to the lower part of the fluid discharge channel and is used to introduce oxygen-containing gas into the fluid discharge channel;

[0009] The first chamber surrounds the outside of the second chamber, and the water inlet is located at the lower part of the first chamber.

[0010] In some embodiments of this utility model, the volume of the first chamber is smaller than the volume of the second chamber but larger than the volume of the fluid discharge channel.

[0011] In some embodiments of this utility model, the height of the first chamber and the height of the second chamber differ by less than 5%, further within 3%, and even further within 1%, for example, they can be equal.

[0012] In some embodiments of this utility model, the distance between the lower inlet of the fluid discharge channel and the bottom of the second chamber is 50-100mm.

[0013] According to some preferred aspects of the present invention, the micro-powered nitrogen removal tank further includes a first check valve and a second check valve;

[0014] The first check valve is used for unidirectional flow from the first chamber to the second chamber and is located at the lower part of the first chamber or the second chamber;

[0015] The second one-way valve is used for unidirectional flow from the second chamber to the first chamber and is located at the lower part of the first chamber or the second chamber.

[0016] The first check valve helps to sink the entire tank into the water, avoiding excessive initial buoyancy that could cause installation difficulties; the second check valve helps to remove the entire tank from the water, allowing the internal water to be discharged during the removal process, thus minimizing weight.

[0017] In some embodiments of this utility model, the micro-powered nitrogen removal tank further includes a water-passing isolation net with multiple through holes. The water-passing isolation net is disposed in the upper part of the first chamber, and the upper part of the first chamber is connected to the upper part of the second chamber through the multiple through holes.

[0018] In some embodiments of this invention, the height of the outlet of the fluid discharge channel is higher than the upper end of the second chamber.

[0019] In some embodiments of this utility model, the micro-powered nitrogen removal tank further includes a water distributor disposed at the bottom of the interior of the first chamber. The water distributor includes a water distribution pipe with multiple water distribution holes, and the water distribution pipe is connected to the water inlet.

[0020] In some embodiments of this utility model, the water distribution pipe extends along the bottom of the first chamber and has a ring-shaped structure; the water distributor also includes a water distribution pipe support member, which is disposed at the bottom of the first chamber and is used to support the water distribution pipe.

[0021] In some embodiments of this utility model, the micro-powered nitrogen removal tank further includes a water inlet pipe disposed on the first chamber, the water inlet being formed on the water inlet pipe, the water outlet of the water inlet pipe being connected to the water distribution pipe, and the height of the water inlet being higher than that of the water outlet.

[0022] In some embodiments of this utility model, the gas supply unit includes a gas supply pipe, the lower part of which has a portion inserted into the fluid discharge channel from the lower part, and the portion extends upward along the axis of the fluid discharge channel.

[0023] In some embodiments of this utility model, the diameter of the air supply pipe is 1 / 6 to 1 / 3 of the width of the fluid discharge channel.

[0024] In some embodiments of this utility model, the micro-powered nitrogen removal tank further includes a slow-release carbon source packing material independently disposed in the first chamber and the second chamber.

[0025] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0026] This invention addresses the difficulty of removing total nitrogen from natural water bodies in existing technologies. Through extensive experimental research, it innovatively provides a novel micro-powered nitrification tank. This tank achieves water flow without external force, relying solely on aeration gas to allow internal water to flow sequentially between multiple chambers or channels under pressure difference. This allows for different functions at different locations. Specifically, it first deoxygenates the water, reducing its oxygen content before it enters the denitrification zone. This provides an anaerobic environment for the denitrification zone, facilitating the reduction of nitrate nitrogen to nitrogen gas through anaerobic respiration and metabolism, thus achieving denitrification. Finally, the water is discharged through the fluid outlet channel, where continuous aeration occurs. This aeration not only provides micro-power for water flow but also, if the aeration gas is oxygen-containing, replenishes the water with oxygen. This ensures that the incoming water maintains a relatively consistent oxygen content with the discharged water, maintaining a relatively stable ecological environment and preventing the alteration of the regional aquatic ecosystem caused by prolonged discharge of low-oxygen water.

[0027] In summary, the energy consumption of this utility model is mainly for the aeration of the aeration and the power to provide gas, which is very low. It is also simple to install (simply submerge the micro-power denitrification tank in the water body), does not occupy land, and does not affect the original aquatic ecology of rivers, lakes and reservoirs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is one of the structural schematic diagrams of the micro-powered nitrogen removal tank in the embodiments of this utility model (with part of the area removed);

[0030] Figure 2 This is the second schematic diagram of the micro-powered nitrogen removal tank in this embodiment of the present invention (with part of the area removed);

[0031] Figure 3 This is one of the structural schematic diagrams of the micro-powered nitrogen removal tank in the embodiments of this utility model (with the cover plate hidden);

[0032] Figure 4 This is the second structural schematic diagram of the micro-powered nitrogen removal tank in this embodiment of the present invention (with the cover plate hidden);

[0033] Figure 5 This is a top view of the micro-powered nitrogen removal tank in an embodiment of the present invention (with the cover plate hidden);

[0034] Figure 6 This is a schematic diagram of the water distributor, water inlet pipe, and the connection between the two in an embodiment of this utility model;

[0035] In the attached drawings, the following are the reference numerals: 1. Cover plate; 2. First chamber; 3. Second chamber; 4. Fluid discharge channel; 51. Air supply pipe; 6. First check valve; 7. Second check valve; 8. Water isolation mesh; 81. Through hole; 91. Water distribution pipe; 911. Water distribution hole; 92. Water distribution pipe support; 10. Water inlet pipe; 11. First fixing component; 12. Second fixing component. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed below.

[0037] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0040] See Figures 1 to 6 This example provides a micro-powered nitrogen removal tank, which includes a first chamber 2 (also known as an oxygen removal zone) for reducing oxygen content, a second chamber 3 (also known as a nitrogen removal reaction zone) for removing nitrogen, a fluid discharge channel 4, and a gas supply unit.

[0041] Furthermore, the first chamber 2 is provided with a water inlet, the upper part of the first chamber 2 is connected to the upper part of the second chamber 3, and the lower part of the second chamber 3 is connected to the lower part of the fluid discharge channel 4; the air supply unit is connected to the lower part of the fluid discharge channel 4 and is used to introduce gas into the fluid discharge channel 4.

[0042] In this example, the fluid discharge channel 4 is located inside the second chamber 3, with its lower part connected to the bottom of the second chamber 3 and its upper part extending out from the second chamber 3. The air supply unit is connected to the lower part of the fluid discharge channel 4 and is used to introduce oxygen-containing gas into the fluid discharge channel 4. The first chamber 2 surrounds the outside of the second chamber 3, and the water inlet is located at the lower part of the first chamber 2. This arrangement not only better ensures the balance of the entire tank and facilitates maintaining a vertical orientation during installation, but also greatly reduces the space occupied and the consumption of equipment materials. In particular, this arrangement can achieve more comprehensive water exchange without stirring, eliminating dead zones and greatly ensuring the deoxygenation and denitrification effects of the water.

[0043] The volume of the first chamber 2 is smaller than that of the second chamber 3 but larger than that of the fluid discharge channel 4. The first chamber 2 is mainly used for deoxygenation, so its volume does not need to be too large. It only needs to be able to remove the oxygen content to the set value in time when the water flows. The second chamber 3 is mainly used for anaerobic bacteria to reduce nitrate nitrogen to nitrogen gas through anaerobic respiration metabolism. Its relatively large size allows for the addition of more bacteria or carbon sources, which is conducive to long-term stable operation and ensures the denitrification effect. The fluid discharge channel 4 is mainly used to discharge the denitrified water and to introduce aeration gas. Its relatively small volume is conducive to driving the water to flow with a smaller aeration flow rate.

[0044] The height of the first chamber 2 and the height of the second chamber 3 should differ by no more than 5%, further within 3%, and even further within 1%, or they can be equal. This arrangement helps ensure that positions at the same height inside the first chamber 2 and the second chamber 3 have similar pressures, which is beneficial for water flow.

[0045] Furthermore, the micro-powered denitrification tank also includes a first one-way valve 6 and a second one-way valve 7; the first one-way valve 6 is used for unidirectional flow from the first chamber 2 to the second chamber 3 and is located at the lower part of the first chamber 2 or the second chamber 3; the second one-way valve 7 is used for unidirectional flow from the second chamber 3 to the first chamber 2 and is located at the lower part of the first chamber 2 or the second chamber 3. The first one-way valve 6 helps to avoid excessive initial buoyancy causing installation difficulties when the entire tank is submerged in water; the second one-way valve 7 helps to remove the entire tank from the water, facilitating the discharge of internal water during removal and minimizing weight. During normal operation of the micro-powered denitrification tank, both one-way valves are in the closed state.

[0046] Specifically, when the micro-powered denitrification tank is first submerged in water, water first enters the first chamber 2. After rising to a certain height in the first chamber 2, the first one-way valve 6 is opened under pressure due to the water pressure. Thus, the water in the first chamber 2 can directly enter the second chamber 3 through the first one-way valve 6, thereby quickly expelling the gas in the second chamber 3, reducing the buoyancy of the entire tank in the water, and facilitating the sinking of the tank. Furthermore, when water is continuously introduced and the water levels in the first chamber 2 and the second chamber 3 are approximately the same, the pressure received by the inlet and outlet of the first one-way valve 6 is approximately equal, which allows the first one-way valve 6 to automatically close.

[0047] When the micro-powered denitrification tank needs to be removed from the water, the tank is relatively heavy because there is initially a lot of water inside. As it is continuously removed until the water level inside the tank is higher than that outside, the water in the first chamber 2 will flow out from the bottom inlet due to the pressure difference. Once the water level in the first chamber 2 starts to drop and drops to a certain level, the second one-way valve 7 will be opened under the pressure difference because the water level in the second chamber 3 is higher. This causes the water in the second chamber 3 to flow into the first chamber 2, while the first chamber 2 continues to drain water out through the inlet. In this way, the weight of the entire tank can be continuously reduced during the removal of the denitrification tank, which is beneficial for handling.

[0048] In this example, the micro-powered nitrogen removal tank also includes a cover plate 1, a first fixing member 11, and a second fixing member 12. The cover plate 1 covers the first chamber 2 and the second chamber 3 and isolates them from the outside. The first fixing member 11 is used to fix the fluid discharge channel 4 on the cover plate 1, and the second fixing member 12 is used to fix the air supply pipe 51 on the fluid discharge channel 4.

[0049] The distance between the lower inlet of the fluid discharge channel 4 and the bottom of the second chamber 3 is 50-100mm. The height of the outlet of the fluid discharge channel 4 is higher than the upper end of the second chamber 3. Furthermore, the upper part of the fluid discharge channel 4 can protrude 150-250mm above the cover plate 1 of the tank body. The diameter of the fluid discharge channel 4 can be 30-50mm.

[0050] In this example, the micro-powered nitrogen removal tank also includes a water-passing isolation net 8 with multiple through holes 81. The water-passing isolation net 8 is located on the upper part of the first chamber 2, and the upper part of the first chamber 2 is connected to the upper part of the second chamber 3 through the aforementioned multiple through holes 81. The water-passing isolation net 8 can be flange-shaped, isolating the first chamber 2 and the second chamber 3, and connecting them only through the aforementioned through holes 81. The diameter of the through holes 81 can be 3-8 mm, and the spacing between two adjacent through holes 81 can be 8-12 mm.

[0051] In this example, the micro-powered nitrogen removal tank also includes a water distributor and a water distribution pipe support 92 located at the bottom of the first chamber 2. The water distributor includes a water distribution pipe 91 with multiple water distribution holes 911, which is connected to the water inlet. The water distribution pipe support 92 is located at the bottom of the first chamber 2 and is used to support the water distribution pipe 91. For example, the lower end face of the water distribution pipe 91 is about 20-30mm away from the bottom of the first chamber 2. The openings of the water distribution holes 911 can be downward facing the bottom of the first chamber 2, or they can be upward. The multiple water distribution holes 911 can be evenly spaced, and the diameter of the water distribution holes 911 can be 8-12mm. Furthermore, the water distribution pipe 91 extends along the bottom of the first chamber 2 and has a ring structure. Specifically, the water distribution pipe 91 can be made of steel pipe with a diameter of about 15-25mm, and its shape is a 360° circular ring structure.

[0052] In this example, the micro-powered nitrogen removal tank also includes a water inlet pipe 10 installed on the first chamber 2. The water inlet is formed on the water inlet pipe 10, and the water outlet of the water inlet pipe 10 is connected to the water distribution pipe 91. The height of the water inlet is higher than that of the water outlet, and a filter screen can also be installed at the water inlet. For example, the water inlet pipe 10 can be roughly L-shaped, with the water inlet of the water inlet pipe 10 connected to an external water body, and the water outlet directly connected to the water distribution pipe 91.

[0053] In this example, the gas supply unit includes a gas supply pipe 51 and a gas supply assembly. The lower part of the gas supply pipe 51 is partially inserted into the fluid discharge channel 4 from the lower part, and this part extends upward along the axis of the fluid discharge channel 4. This arrangement facilitates the outward discharge of the supplied gas along the axis of the fluid discharge channel 4. For example, the length of this part extending upward along the axis of the fluid discharge channel 4 can be 3-8 mm. The gas supply assembly can provide gas and introduce it into the fluid discharge channel 4 through the gas supply pipe 51. The gas supply assembly can include a compressor, etc., and any device capable of supplying gas is acceptable and is not specifically limited here. Optionally, the diameter of the gas supply pipe 51 is 1 / 6 to 1 / 3 of the width of the fluid discharge channel 4, which helps to ensure that the supplied gas can better drive the water in the fluid discharge channel 4 to flow outward. For example, the diameter of the gas supply pipe 51 can be 8-12 mm, and the diameter of the fluid discharge channel 4 can be 35-45 mm.

[0054] In this example, the micro-powered nitrogen removal tank also includes a slow-release carbon source packing material independently installed in the first chamber 2 and the second chamber 3. The slow-release carbon source packing material is cubic in shape and has a volume of 3-10 cm³. 3Each slow-release carbon source packing material is relatively heavy and can be deposited in its corresponding first chamber 2 or second chamber 3 without being carried away by the water. Of course, its large size also makes it difficult to pass through the through-holes of the water-passing isolation net. Specifically, the slow-release carbon source packing materials can be stacked and arranged in the first chamber 2 or second chamber 3, with a filling rate of 60%-100%, such as 70%, 80%, 85%, etc. The slow-release carbon source packing materials can be Sujing SJ-ST spherical packing materials, sodium alginate (SA) carbon-releasing packing materials, polyvinyl alcohol (PVA) carbon-releasing packing materials, etc.

[0055] When the above-mentioned micro-powered nitrogen removal tank is used as a nitrogen removal device for the removal of total nitrogen in wastewater, aerobic bacteria are added to the first chamber 2 and anaerobic bacteria are added to the second chamber 3; the micro-powered nitrogen removal tank after adding bacteria is submerged in the wastewater body; the timing of the gas supply unit starting to supply gas is controlled to be before or after the micro-powered nitrogen removal tank is submerged in the water body.

[0056] Furthermore, the amount of aerobic bacteria added can be adjusted as needed, for example, 1-20 kg, depending on the volume of the first chamber 2. Similarly, the amount of anaerobic bacteria added can also be adjusted as needed, for example, 10-50 kg, depending on the volume of the second chamber 3.

[0057] When the equipment is running, the entire tank is horizontally fixed below the water level of the river or lake. Gas, such as compressed air, enters from the air supply pipe 51, forming rising bubbles in the lower part of the fluid discharge channel 4. The bubbles carry the water from the fluid discharge channel 4 upwards and out of the tank.

[0058] When the water in the fluid discharge channel 4 is discharged from the tank, the pressure in the second chamber 3 (the denitrification reaction zone) and the first chamber 2 (the deoxygenation zone) decreases. Under the action of the pressure difference, the external water will enter the water distribution pipe 91 through the water inlet pipe 10, and then enter the deoxygenation zone and the denitrification reaction zone in sequence before being discharged through the fluid discharge channel 4, thus completing the cycle.

[0059] Water enters the deoxygenation zone evenly through water distribution pipe 91. Under the action of slow-release carbon source and aerobic bacteria, the dissolved oxygen in the water will quickly drop to below 0.2 mg / L. When the water with low dissolved oxygen enters the denitrification reaction zone, it will also carry a large amount of organic matter. In the denitrification reaction zone, an environment with both a large amount of carbon source and anaerobic environment will be formed. The anaerobic respiration metabolism of anaerobic bacteria will reduce nitrate nitrogen to nitrogen gas and release it into the water. After denitrification, the water in the denitrification reaction zone enters the fluid discharge channel. During the upward process, dissolved oxygen will be replenished to a level of above 3 mg / L and discharged into the external water body.

[0060] In summary, this invention addresses the difficulty of removing total nitrogen from natural water bodies in existing technologies. Through extensive experimental research, it innovatively provides a novel micro-powered nitrification tank. This tank achieves water flow without external force, relying solely on aeration gas to allow internal water to flow sequentially between multiple chambers or channels under pressure differential. This allows for different functions at different locations. Specifically, it first deoxygenates the water, reducing its oxygen content before it enters the denitrification zone. This provides an anaerobic environment for the denitrification zone, facilitating the reduction of nitrate nitrogen to nitrogen gas through anaerobic respiration and metabolism, thus achieving denitrification. Finally, the water is discharged through the fluid outlet channel, where continuous aeration occurs. This aeration not only provides micro-power for water flow but also, if the aeration gas is oxygen-containing, replenishes the water with oxygen. This ensures that the incoming water maintains a relatively consistent oxygen content with the discharged water after denitrification, maintaining a relatively stable ecological environment and preventing the alteration of the regional aquatic ecosystem caused by prolonged discharge of low-oxygen water. The energy consumption of this invention is mainly for the aeration of the aeration system and the power to provide the gas, resulting in very low energy consumption. Furthermore, it is easy to install (simply submerge the micro-power denitrification tank in the water body), does not occupy land, and does not affect the original aquatic ecology of rivers, lakes, and reservoirs.

[0061] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

[0062] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

Claims

1. A micro-kinetic denitrator, characterized by, The micro-power nitrogen removal tank comprises a first chamber for reducing oxygen content, a second chamber for removing nitrogen, a fluid discharge channel and a gas supply unit; The first chamber is provided with a water inlet, the upper part of the first chamber is communicated with the upper part of the second chamber, and the lower part of the second chamber is communicated with the lower part of the fluid discharge channel; The gas supply unit is communicated with the lower part of the fluid discharge channel and is used for supplying gas into the fluid discharge channel.

2. The micro power denitrator according to claim 1, wherein The fluid discharge channel is arranged inside the second chamber, the lower part of the fluid discharge channel is communicated with the bottom of the inside of the second chamber, the upper part of the fluid discharge channel extends out of the second chamber, the gas supply unit is communicated with the lower part of the fluid discharge channel and is used for supplying oxygen-containing gas into the fluid discharge channel; The first chamber surrounds the outside of the second chamber, and the water inlet is arranged at the lower part of the first chamber.

3. The micro power denitrator of claim 1, wherein, The volume of the first chamber is smaller than the volume of the second chamber and larger than the volume of the fluid discharge channel; and / or the distance between the inlet of the lower part of the fluid discharge channel and the bottom of the second chamber is 50-100 mm.

4. The micro power denitrator of claim 1, wherein, The micro-power nitrogen removal tank further comprises a first one-way valve and a second one-way valve; the first one-way valve is used for one-way conduction from the first chamber to the second chamber and is arranged at the lower part of the first chamber or the second chamber; the second one-way valve is used for one-way conduction from the second chamber to the first chamber and is arranged at the lower part of the first chamber or the second chamber.

5. The micro power denitrator of claim 1, wherein, The micro-power nitrogen removal tank further comprises a slow-release carbon source filler independently arranged in the first chamber and the second chamber.

6. The micro power denitrator of claim 1, wherein, The micro-power nitrogen removal tank further comprises a water passing isolation net with a plurality of through holes, the water passing isolation net is arranged at the upper part of the first chamber, the upper part of the first chamber is communicated with the upper part of the second chamber through the plurality of through holes; and / or the height of the outlet of the fluid discharge channel is higher than the upper end of the second chamber.

7. The micro power denitrator of claim 1, wherein The micro-power nitrogen removal tank further comprises a water distributor arranged at the bottom of the inside of the first chamber, the water distributor comprises a water distribution pipe with a plurality of water distribution holes, and the water distribution pipe is communicated with the water inlet.

8. The micro power denitrator of claim 7, wherein, The water distribution pipe extends along the bottom of the first chamber and has a ring structure; the water distributor further comprises a water distribution pipe support arranged at the bottom of the first chamber and used for supporting the water distribution pipe; and / or the micro-power nitrogen removal tank further comprises a water inlet pipe arranged on the first chamber, the water inlet is formed on the water inlet pipe, the water outlet of the water inlet pipe is communicated with the water distribution pipe, and the height of the water inlet is higher than the water outlet.

9. The micro power denitrator of claim 1, wherein, The gas supply unit comprises a gas supply pipe, the lower part of the gas supply pipe has a part inserted into the fluid discharge channel from the lower part of the fluid discharge channel, and the part extends upward along the axial line direction of the fluid discharge channel.

10. The micro power denitrator of claim 9, wherein, The diameter of the gas supply pipe is 1 / 6-1 / 3 of the width of the fluid discharge channel.

Images