High-efficiency sewage treatment denitrification reactor with filter material self-sustaining reaction

Abstract

The efficient sewage treatment denitrification reactor comprises a first filter tank and a second filter tank, a water inlet weir plate is fixedly connected to the top of the inner side of the first filter tank, a backwashing drainage weir plate is fixedly connected to the top of the inner side of the second filter tank, and a water outlet channel is formed in the bottom of the first filter tank; a backwashing wastewater discharge port is formed in the bottom of the second filter tank, the clean water tank is fixedly connected to one side of the first filter tank, and the tail end of the clean water outlet pipe is fixedly connected with the clean water tank; a plurality of groups of backwash air branch pipes which are arranged at equal intervals are fixedly mounted outside the backwash air main pipe; the backwashing mechanism is mounted among the clean water tank, the first filter tank and the second filter tank, and a first backwashing wastewater discharge pipe is fixedly connected to the outer part of the backwashing drainage weir plate. The device not only avoids the addition of an external organic carbon source and reduces the operation cost, but also effectively avoids the risk that the chemical oxygen demand of effluent exceeds the standard, and provides an efficient and environment-friendly new scheme for the field of sewage treatment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to a high-efficiency wastewater treatment denitrification reactor with a filter media self-sustaining reaction. Background Technology

[0002] Traditionally, advanced treatment of total nitrogen (TNO) typically involves adding a denitrification filter after secondary biological treatment. In this process, denitrifying bacteria, operating in an anaerobic environment, reduce nitrate nitrogen in wastewater to ammonia through denitrification, thereby removing TNO. However, these denitrifying bacteria are mostly heterotrophic, and their life activities depend on the supply of external organic carbon sources. Therefore, in practice, large amounts of carbon source agents, such as methanol and acetic acid, are often added to the system to meet the growth requirements of the denitrifying bacteria. Typically, the carbon source dosage needs to be approximately four times the amount of total ammonia to be removed, which undoubtedly increases operating costs and carries the risk of overdosing, potentially leading to excessive chemical oxygen demand (COD) in the effluent and affecting water quality. Therefore, to address these technical issues, this paper proposes a high-efficiency wastewater treatment denitrification reactor with a self-sustaining filter media reaction system. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency denitrification reactor for wastewater treatment with a self-sustaining filter media reaction. This not only avoids the addition of external organic carbon sources and reduces operating costs, but also effectively avoids the risk of excessive chemical oxygen demand in the effluent, providing a new, efficient, and environmentally friendly solution for the wastewater treatment field.

[0004] This utility model is achieved through the following technical solution:

[0005] A high-efficiency wastewater treatment denitrification reactor with self-sustaining filter media reaction, characterized in that it comprises:

[0006] A first filter and a second filter, both of which have a reactor body fixedly installed inside. An inlet weir plate is fixedly connected to the top inner side of the first filter, and a backwash drainage weir plate is fixedly connected to the top inner side of the second filter. An outlet channel is opened at the bottom of the first filter, and a backwash wastewater discharge port is opened at the bottom of the second filter. A filtration mechanism is installed on the upper side of both the outlet channel and the backwash wastewater discharge port.

[0007] A clear water tank is fixedly connected to one side of the first filter tank. A clear water outlet pipe is fixedly connected to the outside of the outlet channel, and the end of the clear water outlet pipe is fixedly connected to the clear water tank.

[0008] The backwash air pipe is fixedly installed on the outside of the first filter tank and the second filter tank. The inside of the first filter tank and the second filter tank is fixedly connected to the backwash air main pipe, and the backwash air main pipe and the backwash air pipe are fixedly connected. Multiple sets of backwash air branch pipes arranged at equal intervals are fixedly installed on the outside of the backwash air main pipe.

[0009] A backwashing mechanism is installed between the clear water tank and the first and second filter tanks;

[0010] The wastewater pool is fixedly connected to one side of the clear water pool. The backwash drainage weir plate is fixedly connected to the outside of the first backwash wastewater discharge pipe, and the end of the first backwash wastewater discharge pipe extends into the wastewater pool.

[0011] Preferably, an inlet pipe is fixedly connected to the outside of the inlet weir plate.

[0012] Preferably, the filtration mechanism includes a water and air distribution block, a support layer, and a self-nourishing active filter media. The water and air distribution block is laid on the upper side of the water outlet channel and the backwash wastewater discharge port. The support layer is fixedly installed on the upper side of the water and air distribution block, and the self-nourishing active filter media is laid on the upper side of the support layer.

[0013] Preferably, the bottom of the backflushing air branch pipe is provided with a small hole.

[0014] Preferably, the backwashing mechanism includes a backwash water pump, a backwash water pipe, and a backwash wastewater discharge port. The backwash wastewater discharge port is located at the bottom of the second filter tank. The backwash water pump is fixedly connected to the inside of the clear water tank. The backwash water pipe is fixedly connected between the backwash wastewater discharge port and the backwash water pump.

[0015] Preferably, a backwash wastewater discharge pump is fixedly connected inside the wastewater tank, and a second backwash wastewater discharge pipe is fixedly connected outside the backwash wastewater discharge pump.

[0016] The technical solution of this utility model has at least the following beneficial effects:

[0017] This high-efficiency denitrification reactor for wastewater treatment features a self-sustaining reaction system. Wastewater is evenly distributed above the autotrophic activated filter media through an inlet weir plate, flows from top to bottom through the gaps in the media to the water and air distribution blocks, and is collected at the bottom outlet channel. Finally, it flows out through the clear water outlet pipe. After a certain number of cycles, the reactor requires backwashing to remove impurities trapped between the gaps in the autotrophic activated filter media. First, the external backwash fan is turned on, and compressed air is introduced into the reactor through the backwash air pipe. Then, the main backwash air pipe distributes the compressed air to each backwash air branch pipe. Small holes at the bottom of each branch pipe allow for even distribution of compressed air to every corner of the filter media, creating air bubbles. The air bubbles impact the surface of the filter media, causing the self-trophic activated filter media to rub against each other, thus removing trapped impurities. These impurities are then flushed to the upper water layer of the self-trophic activated filter media by the air bubbles. Simultaneously, the backwash water pump in the clear water tank is activated after the backwash air flushing section, and the backwash water is introduced into the reactor through the backwash water pipe. The backwash water flows in the opposite direction to the normal filtered effluent, entering from the bottom backwash wastewater discharge port. It flows sequentially through the water and air distribution block, the support layer, the self-trophic activated filter media layer, and the water layer, and finally exits the reactor from the backwash drainage weir plate. It is then led to the wastewater tank through the first backwash wastewater discharge pipe. During this process, impurities in the water layer are flushed out of the reactor. After the backwash fan is turned off, the backwash water pump is delayed in shutting down to ensure that the impurities are thoroughly flushed out. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a top view of the present invention;

[0020] Figure 3 This is a first structural cross-sectional view of the present invention;

[0021] Figure 4 This is a cross-sectional view of the second section of the structure of this utility model;

[0022] Icons: 1. First filter bed; 2. Second filter bed; 3. Reactor body; 4. Inlet weir plate; 5. Outlet channel; 6. Water and air distribution block; 7. Support layer; 8. Self-trophic activated filter media; 9. Clear water outlet pipe; 10. Backwash air pipe; 11. Backwash air main pipe; 12. Backwash air branch pipe; 13. Clear water tank; 14. Backwash clear water pump; 15. Backwash clear water pipe; 16. Backwash drainage weir plate; 17. Backwash wastewater discharge outlet; 18. Wastewater tank; 19. First backwash wastewater discharge pipe; 20. Inlet pipe; 21. Backwash wastewater discharge pump; 22. Second backwash wastewater discharge pipe. Detailed Implementation

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

[0024] Example

[0025] Please see Figure 1-4 This application discloses a high-efficiency wastewater treatment denitrification reactor with self-sustaining filter media reaction, comprising a first filter 1 and a second filter 2, a clear water tank 13, a backwash air pipe 10, a backwashing mechanism, and a wastewater tank 18. The reactor body 3 is fixedly installed inside both the first filter 1 and the second filter 2. An inlet weir plate 4 is fixedly connected to the top inner side of the first filter 1, and a backwash drainage weir plate 16 is fixedly connected to the top inner side of the second filter 2. An outlet channel 5 is opened at the bottom of the first filter 1, and a backwash wastewater discharge port 17 is opened at the bottom of the second filter 2. A filtration mechanism is installed above both the outlet channel 5 and the backwash wastewater discharge port 17. The clear water tank 13 is fixedly connected to one side of the first filter 1, and a clear water outlet pipe 9 is fixedly connected to the outside of the outlet channel 5. The end of the clear water outlet pipe 9 is fixedly connected to the clear water tank 13; the backwash air pipe 10 is fixedly installed on the outside of the first filter tank 1 and the second filter tank 2, and the inside of the first filter tank 1 and the second filter tank 2 is fixedly connected to the backwash air main pipe 11, and the backwash air main pipe 11 and the backwash air pipe 10 are fixedly connected. Multiple sets of backwash air branch pipes 12 arranged at equal intervals are fixedly installed on the outside of the backwash air main pipe 11; the backwash mechanism is installed between the clear water tank 13 and the first filter tank 1 and the second filter tank 2; the wastewater tank 18 is fixedly connected to one side of the clear water tank 13, and the outside of the backwash drainage weir plate 16 is fixedly connected to the first backwash wastewater discharge pipe 19, and the end of the first backwash wastewater discharge pipe 19 extends into the wastewater tank 18.

[0026] The inlet weir plate 4 is externally fixedly connected to an inlet pipe 20, through which sewage can be introduced into the inlet weir plate 4.

[0027] The filtration mechanism includes a water and air distribution block 6, a support layer 7, and a self-growth active filter media 8. The water and air distribution block 6 is laid on the upper side of the water outlet channel 5 and the backwash wastewater discharge port 17. The support layer 7 is fixedly installed on the upper side of the water and air distribution block 6. The self-growth active filter media 8 is laid on the upper side of the support layer 7. The self-growth active filter media 8 is made of a special formula, and its main components are sulfur and its inorganic compounds, which are cross-linked through a skeleton.

[0028] The bottom of the backwash air branch pipe 12 has a small hole, which can evenly distribute compressed air to every corner of the filter media and impact the surface of the filter media in the form of bubbles, causing the filter media to rub against each other.

[0029] The backwashing mechanism includes a backwash water pump 14, a backwash water pipe 15, and a backwash wastewater discharge port 17. The backwash wastewater discharge port 17 is located at the bottom of the second filter tank 2. The backwash water pump 14 is fixedly connected to the inside of the clear water tank 13. The backwash water pipe 15 is fixedly connected between the backwash wastewater discharge port 17 and the backwash water pump 14.

[0030] A backwash wastewater discharge pump 21 is fixedly connected inside the wastewater tank 18, and a second backwash wastewater discharge pipe 22 is fixedly connected outside the backwash wastewater discharge pump 21. By operating the backwash wastewater discharge pump 21, the wastewater in the wastewater tank 18 can be discharged through the second backwash wastewater discharge pipe 22.

[0031] The working principle of the high-efficiency wastewater treatment denitrification reactor based on the self-sustaining reaction of the filter media in this embodiment is as follows: the wastewater to be treated is evenly distributed above the autotrophic activated filter media 8 through the inlet weir plate 4, flows from top to bottom through the gaps of the autotrophic activated filter media 8 to the water and air distribution block 6, and is collected through the bottom outlet channel 5. Finally, it flows out through the clear water outlet pipe 9. After a certain number of working cycles, the reactor needs to be backwashed to wash away the impurities trapped between the gaps of the autotrophic activated filter media 8. First, the external backwash fan is turned on, and compressed air is introduced through the backwash air pipe 10. The compressed air enters the reactor and is then distributed by the backwash air main pipe 11 to each backwash air branch pipe 12. The bottom of each backwash air branch pipe 12 has small holes, allowing compressed air to be evenly distributed to every corner of the self-trophic activated filter media 8. The compressed air impacts the surface of the self-trophic activated filter media 8 in the form of bubbles, causing the media to rub against each other, thus removing trapped impurities. These impurities are then flushed to the upper water layer of the self-trophic activated filter media 8 by the bubbles. Simultaneously, the backwash clean water pump 14 in the clean water tank 13 is activated after the backwash air flushing, introducing clean water through the backwash clean water pipe 15. The reactor enters from the bottom backwash wastewater discharge port 17 in the opposite direction to the normal filtered effluent flow. The water flows sequentially through the water and air distribution block 6, the support layer 7, the self-trophic activated filter media layer 8, and the water layer. Finally, it exits the reactor through the backwash drainage weir plate 16 and is led to the wastewater pool 18 via the first backwash wastewater discharge pipe 19. During this process, impurities in the water layer are washed away from the reactor. After the backwash blower is turned off, the backwash clean water pump 14 is delayed in shutting down to ensure that impurities are thoroughly washed away. It is worth mentioning that before starting the reactor, through debugging and acclimation, some chemoautotrophic denitrifying bacteria, such as *Thiobacillus denitrifyingus*, are allowed to grow on the surface of the self-trophic activated filter media 8. These chemoautotrophic denitrifying bacteria can utilize the sulfur and its inorganic compounds contained in the self-trophic activated filter media 8 as energy for their metabolic processes in an anaerobic environment. They absorb other inorganic nutrients in the wastewater, synthesize their own organic matter, and carry out anabolism. In this process, nitrates in the wastewater, as the final acceptor in the electron transport chain, are reduced to nitrogen gas and discharged from the water, ultimately achieving the purpose of removing total nitrogen.

[0032] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency wastewater treatment denitrification reactor with self-sustaining filter media reaction, characterized in that, include: The first filter (1) and the second filter (2) are both equipped with a reactor body (3). The top inner side of the first filter (1) is fixedly connected to an inlet weir plate (4), and the top inner side of the second filter (2) is fixedly connected to a backwash drainage weir plate (16). The bottom of the first filter (1) is provided with an outlet channel (5), and the bottom of the second filter (2) is provided with a backwash wastewater discharge port (17). The outlet channel (5) and the backwash wastewater discharge port (17) are both equipped with a filtration mechanism. The clear water tank (13) is fixedly connected to one side of the first filter tank (1), and the water outlet channel (5) is fixedly connected to the outside of the clear water outlet pipe (9), and the end of the clear water outlet pipe (9) is fixedly connected to the clear water tank (13). A backwash air pipe (10) is fixedly installed on the outside of the first filter tank (1) and the second filter tank (2). The inside of the first filter tank (1) and the second filter tank (2) are both fixedly connected to the backwash air main pipe (11), and the backwash air main pipe (11) and the backwash air pipe (10) are fixedly connected. Multiple sets of backwash air branch pipes (12) are fixedly installed on the outside of the backwash air main pipe (11). A backwashing mechanism is installed between the clear water tank (13) and the first filter tank (1) and the second filter tank (2); Wastewater pool (18) is fixedly connected to one side of clear water pool (13). The backwash drainage weir plate (16) is fixedly connected to the outside of the first backwash wastewater discharge pipe (19), and the end of the first backwash wastewater discharge pipe (19) extends into the wastewater pool (18).

2. The high-efficiency wastewater treatment denitrification reactor with self-sustaining filter media reaction according to claim 1, characterized in that: The inlet weir plate (4) is externally fixedly connected to an inlet pipe (20).

3. The high-efficiency wastewater treatment denitrification reactor with self-sustaining filter media reaction according to claim 2, characterized in that: The filtration mechanism includes a water and air distribution block (6), a support layer (7), and a self-nourishing active filter media (8). The water and air distribution block (6) is laid on the upper side of the water outlet channel (5) and the backwash wastewater discharge port (17). The support layer (7) is fixedly installed on the upper side of the water and air distribution block (6). The self-nourishing active filter media (8) is laid on the upper side of the support layer (7).

4. The high-efficiency wastewater treatment denitrification reactor with self-sustaining filter media reaction according to claim 3, characterized in that: The bottom of the backwash air branch pipe (12) is provided with a small hole.

5. The high-efficiency wastewater treatment denitrification reactor with self-sustaining filter media reaction according to claim 4, characterized in that: The backwashing mechanism includes a backwash water pump (14), a backwash water pipe (15), and a backwash wastewater discharge port (17). The backwash wastewater discharge port (17) is located at the bottom of the second filter tank (2). The backwash water pump (14) is fixedly connected to the inside of the clear water tank (13). The backwash water pipe (15) is fixedly connected between the backwash wastewater discharge port (17) and the backwash water pump (14).

6. The high-efficiency wastewater treatment denitrification reactor with self-sustaining filter media reaction according to claim 5, characterized in that: The wastewater tank (18) is internally fixedly connected to a backwash wastewater discharge pump (21), and the backwash wastewater discharge pump (21) is externally fixedly connected to a second backwash wastewater discharge pipe (22).

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