Emergency sewage treatment device and method with high efficiency of denitrification and phosphorus removal

Abstract

The application discloses an emergency sewage treatment device and method with high-efficiency nitrogen and phosphorus removal, and relates to the field of sewage treatment.The device comprises a device body and a shielding assembly, an exhaust pipe is arranged on the left side of the top of the shielding assembly, a shielding window is movably connected to the right side of the top of the shielding assembly, a material box is arranged on the top of a moving seat, a scraper is rotatably connected in the inner cavity of the material box, a driving assembly is arranged on the outer wall of the material box, two fixed discs are symmetrically arranged on the opposite sides of two driving columns, a discharging barrel is rotatably connected to the middle of the opposite side of the two fixed discs, chains are symmetrically arranged at the bottom of both ends of the inner cavity of the device body, sprockets are arranged in the inner cavities of the chains, and stirring rollers are arranged on the opposite sides of the two sprockets.The device has good energy-saving effect and can effectively improve the treatment efficiency during sewage treatment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to an emergency wastewater treatment device and method for efficient nitrogen and phosphorus removal. Background Technology

[0002] Wastewater refers to wastewater discharged from domestic and industrial processes that has been polluted to some extent. Water that has lost its original function is simply called wastewater. It mainly consists of water used for domestic purposes, containing a high amount of organic matter, and is relatively easy to treat. However, wastewater denitrification and phosphorus removal often require multiple equipment combinations and repeated wastewater transfers, making the overall process cumbersome and costly. Therefore, it is necessary to propose a highly efficient emergency wastewater treatment device and method for denitrification and phosphorus removal to solve these problems. Summary of the Invention

[0003] The main objective of this invention is to provide an efficient emergency wastewater treatment device and method for nitrogen and phosphorus removal, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an emergency wastewater treatment device for high-efficiency nitrogen and phosphorus removal, comprising a device body and a shielding assembly. An exhaust pipe is installed on the left side of the top of the shielding assembly, and a shielding window is movably connected to the right side of the top of the shielding assembly. A movable base is movably connected to the top of the device body, and a material box is installed on the top of the movable base. A scraper is rotatably connected to the inner cavity of the material box, and a drive assembly is installed on the outer wall of the material box. A connecting shaft is provided in the material box, and first stirring rods are symmetrically installed at both ends of the top of the connecting shaft. Drive columns are symmetrically installed at both ends of the bottom of the movable base, and fixed discs are symmetrically installed on opposite sides of the two drive columns. A discharge bucket is rotatably connected to the center of opposite sides of the two fixed discs. Chains are symmetrically installed at the bottom of both ends of the inner cavity of the device body, and sprockets are installed in the inner cavity of the chains. A stirring roller is installed on opposite sides of the two sprockets. A fixed column is installed in the inner cavity of the first stirring rod, and a limiting block is installed at the other end of the fixed column. A second spring is wound around the outer wall of the fixed column. One end of the second spring is installed in the inner cavity of the movable column, and the other end of the second spring is connected to the movable column. The movable column is sleeved on the outer wall of the fixed column, and the limiting block is movably connected in the inner cavity of the first stirring rod.

[0005] The bottoms of the two drive columns are symmetrically rotatably connected to sprockets. A servo motor is installed on the outer wall of the drive assembly. A belt is installed in the inner cavity of the drive assembly. Pulleys are installed at the top and bottom of the belt. The top pulley is connected to a connecting shaft, and the bottom pulley is connected to a sprocket at one end. The servo motor is connected to the top pulley through a first rotating shaft.

[0006] The tops of the two fixed plates are symmetrically equipped with conveying pipes, the tops of the conveying pipes are installed at the bottom of the material box, and a discharge pipe is installed in the center of the right side of the discharge bucket. The outer wall of the discharge bucket is equipped with a second stirring rod, and there are three second stirring rods. The conveying pipes are connected to the inner cavity of the discharge bucket through the fixed plates.

[0007] Preferably, a fixing rod is symmetrically installed on the left side of both ends of the inner cavity of the shielding component, and a first spring is wound around the outer wall of the fixing rod. The left sides of both ends of the shielding window are symmetrically and movably connected to both ends of the inner cavity of the shielding component and sleeved on the outer wall of the fixing rod. One end of the first spring is installed in the inner cavity of the shielding component, and the other end of the first spring is connected to the shielding window.

[0008] Preferably, a slot is provided on the side of the inner cavity of the shielding component, and a block is installed on the left side of the shielding window. The size of the block and the slot are matched, and the block is inserted into the inner cavity of the slot.

[0009] Preferably, a drain pipe is installed on the outer wall of the device body, transparent windows are symmetrically installed at both ends of the device body, guide grooves are symmetrically opened at both ends of the top of the device body, guide rods are installed in the inner cavity of the guide grooves, and the two ends of the bottom of the movable seat are symmetrically and movably connected to the inner cavities of the two guide grooves and sleeved on the outer walls of the two guide rods.

[0010] Preferably, a sealing plug is installed in the center of the top of the material box, and movable columns are symmetrically connected to the inner cavities of the two first stirring rods. The other end of the movable column is connected to a scraper, and the outer wall of the scraper is attached to the inner wall of the material box.

[0011] Preferably, the chain meshes with the sprocket, and there are four stirring rollers, which are rotatably connected to the bottom of the inner cavity of the device body. An efficient emergency wastewater treatment method for nitrogen and phosphorus removal includes the following steps: S1: Move the shielding window to the right, open the sealing plug, pour the denitrification and phosphorus removal treatment liquid into the inner cavity of the material box, and release the shielding window. At this time, the first spring drives the shielding window to reset, so that the card block can be inserted into the card slot, which can then seal the device body. S2: Start the servo motor. The servo motor drives the belt and pulley. The pulley at the top drives the connecting shaft to rotate. The connecting shaft drives the scraper to rotate through the first stirring rod and the movable column. The first stirring rod and the movable column stir and mix the treatment liquid. The scraper cleans the inner wall of the material box. S3: The bottom pulley drives one of the sprockets to rotate, and the sprocket can then mesh with the chain it contacts, so that the chain can drive the internal sprocket, and the sprocket can then drive the stirring roller to rotate, thus stirring and treating the sewage in the inner cavity of the device. S4: When the sprocket rotates, it will drive the material box to move left and right through the drive column and the moving seat. At the same time, the fixed plate can also move. In conjunction with the second stirring rod, it will come into contact with the sewage, which will drive the feeding bucket to rotate. While the feeding bucket is rotating, the treatment liquid is input into the sewage through the feeding pipe. After stirring, the sewage can be denitrified and dephosphorized. During operation, the generated exhaust gas can be discharged through the exhaust pipe, and the treated sewage can be discharged through the drain pipe.

[0012] Compared with the prior art, the present invention provides an emergency wastewater treatment device and method for efficient nitrogen and phosphorus removal, which has the following beneficial effects: This efficient emergency wastewater treatment device and method for nitrogen and phosphorus removal ensures that the device body is sealed during wastewater treatment by using a shielding component. This also ensures that exhaust gas can only be discharged from the exhaust pipe, thus avoiding pollution to the surrounding environment. The movable and positionable shielding window facilitates the addition of wastewater and treatment liquid to the device body. This efficient emergency wastewater treatment device and method for nitrogen and phosphorus removal, through the activation of the set drive component, can drive the belt and pulley. The pulley at the top can drive the connecting shaft to rotate, and the connecting shaft can drive the first stirring rod, the movable column and the scraper to rotate. The first stirring rod and the movable column can stir and mix the treatment liquid in the inner cavity of the material tank, and the scraper can clean the inner wall of the scraper. Through the set fixed column, limit block and second spring, the movable column can always drive the scraper to move outward, so that the scraper can always be in contact with the inner wall of the material tank. Based on this, the cleaning efficiency of the inner wall of the material tank can be improved, and the overall adaptability can also be guaranteed. This efficient emergency wastewater treatment device and method for nitrogen and phosphorus removal has a bottom pulley that can mesh with a chain after rotation. This allows the drive assembly to move left and right. The chain, after rotation, can drive the stirring roller to rotate through its internal sprocket. This allows the treatment liquid and wastewater to be mixed evenly, enabling the wastewater to undergo nitrogen and phosphorus removal. This efficient emergency wastewater treatment device and method for nitrogen and phosphorus removal uses a conveying pipe to input the treatment liquid into the inner cavity of the feeding tank. In conjunction with the feeding pipe, the treatment liquid can be fed into the wastewater. When the feeding tank moves, the second stirring rod on its outer wall comes into contact with the wastewater, causing the second stirring rod to rotate the feeding tank. At this time, the feeding pipe can be repositioned, allowing the treatment liquid to be fed into various locations within the wastewater, effectively improving treatment efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the shielding component of the present invention; Figure 3 This is a schematic diagram of the structure of the device body of the present invention; Figure 4 This is a schematic diagram of the material box structure of the present invention; Figure 5 This is a schematic diagram of the structure of the feeding bucket of the present invention.

[0014] In the diagram: 1. Device body; 2. Drain pipe; 3. Transparent window; 4. Shielding assembly; 5. Exhaust pipe; 6. Fixing rod; 7. First spring; 8. Slot; 9. Block; 10. Guide groove; 11. Guide rod; 12. Moving seat; 13. Material box; 14. Sealing plug; 15. Drive assembly; 16. Servo motor; 17. Connecting shaft; 18. First stirring rod; 19. Scraper; 20. Movable column; 21. Fixing column; 22. Limiting block; 23. Second spring; 24. Belt; 25. Pulley; 26. Drive column; 27. Fixing disc; 28. Feeding bucket; 29. ​​Feeding pipe; 30. Conveying pipe; 31. Second stirring rod; 33. Sprocket; 34. Chain; 35. Stirring roller; 36. Shielding window. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0016] Example 1: As Figure 1 , Figure 2 As shown, an efficient emergency wastewater treatment device for nitrogen and phosphorus removal includes a device body 1 and a shielding assembly 4. An exhaust pipe 5 is installed on the left side of the top of the shielding assembly 4, and a shielding window 36 is movably connected to the right side of the top of the shielding assembly 4. Fixing rods 6 are symmetrically installed on the left sides of both ends of the inner cavity of the shielding assembly 4. A first spring 7 is wound around the outer wall of the fixing rod 6. The left sides of both ends of the shielding window 36 are symmetrically and movably connected to both ends of the inner cavity of the shielding assembly 4 and sleeved on the outer wall of the fixing rod 6. One end of the first spring 7 is installed in the inner cavity of the shielding assembly 4, and the other end of the first spring 7... Connected to the shielding window 36, the shielding component 4 has a slot 8 on the side of its inner cavity, and a block 9 is installed on the left side of the shielding window 36. The size of the block 9 and the slot 8 are matched, and the block 9 is inserted into the inner cavity of the slot 8. Through the shielding component 4, when the device body 1 is performing sewage treatment, it can be ensured that the device body 1 is in a sealed state, and at the same time, the exhaust gas can only be discharged from the exhaust pipe 5, which can avoid pollution to the surrounding environment. The movable and positionable shielding window 36 makes it convenient to add sewage and treatment liquid to the device body 1.

[0017] Example 2: Figure 1 , Figure 3 , Figure 4 , Figure 5As shown, an efficient emergency wastewater treatment device for nitrogen and phosphorus removal includes a movable base 12 movably connected to the top of the device body 1. A material box 13 is mounted on the top of the movable base 12, and a scraper 19 is rotatably connected to the inner cavity of the material box 13. A drive assembly 15 is mounted on the outer wall of the material box 13. A drain pipe 2 is mounted on the outer wall of the device body 1. Transparent windows 3 are symmetrically mounted at both ends of the device body 1. Guide grooves 10 are symmetrically opened at both ends of the top of the device body 1. Guide rods 11 are installed in the inner cavity of the guide grooves 10. The bottom of the movable base 12... The two ends of the part are symmetrically and movably connected to the inner cavities of the two guide grooves 10 and sleeved on the outer walls of the two guide rods 11. A sealing plug 14 is installed in the center of the top of the material box 13. The two ends of the top of the connecting shaft 17 are symmetrically installed with first stirring rods 18. Movable columns 20 are symmetrically and movably connected in the inner cavities of the two first stirring rods 18. The other end of the movable column 20 is connected to the scraper 19. The outer wall of the scraper 19 is attached to the inner wall of the material box 13. A fixed column 21 is installed in the inner cavity of the first stirring rod 18. A limiting device is installed at the other end of the fixed column 21. The limiting block 22 has a second spring 23 wound around the outer wall of the fixed column 21. One end of the second spring 23 is installed in the inner cavity of the movable column 20, and the other end of the second spring 23 is connected to the movable column 20. The movable column 20 is sleeved on the outer wall of the fixed column 21. The limiting block 22 is movably connected in the inner cavity of the first stirring rod 18. By activating the drive assembly 15, the belt 24 and pulley 25 can be driven. The pulley 25 at the top can drive the connecting shaft 17 to rotate, and the connecting shaft 17 can drive the first stirring rod 18 and the movable column 20 to rotate. The moving column 20 and the scraper 19 rotate, wherein the first stirring rod 18 and the moving column 20 can stir and mix the treatment liquid in the inner cavity of the material box 13, and the scraper 19 can clean the inner wall of the scraper 19. Through the fixed column 21, the limiting block 22 and the second spring 23, the moving column 20 can always drive the scraper 19 to move outward, so that the scraper 19 can always be in contact with the inner wall of the material box 13. Based on this, the cleaning efficiency of the inner wall of the material box 13 can be improved, and the overall adaptability can also be guaranteed.

[0018] Example 3: Figure 1 , Figure 3 , Figure 4 , Figure 5As shown, an efficient emergency wastewater treatment device for nitrogen and phosphorus removal includes drive columns 26 symmetrically mounted at both ends of the bottom of a movable base 12. Fixed discs 27 are symmetrically mounted on opposite sides of the two drive columns 26. A feeding hopper 28 is rotatably connected to the center of opposite sides of the two fixed discs 27. Chains 34 are symmetrically mounted at the bottom of both ends of the inner cavity of the device body 1. Sprockets 33 are installed inside the inner cavity of the chains 34. A stirring roller 35 is mounted on opposite sides of the two sprockets 33. Sprockets 33 are symmetrically rotatably connected to the bottom of the two drive columns 26. A servo motor 16 is mounted on the outer wall of a drive assembly 15. A belt 24 is installed inside the inner cavity of the drive assembly 15. Pulleys 25 are mounted on the top and bottom of the belt 24. The top pulley 25 is connected to a connecting shaft 17, and the bottom pulley 25 is connected to one end of the sprocket 33. The servo motor 16 is connected to the first rotating shaft... The top pulley 25 is connected, and the top of the two fixed plates 27 are symmetrically equipped with conveying pipes 30. The top of the conveying pipes 30 is installed at the bottom of the material box 13. The center of the right side of the feeding bucket 28 is equipped with a feeding pipe 29. The outer wall of the feeding bucket 28 is equipped with three second stirring rods 31. The conveying pipes 30 are connected to the inner cavity of the feeding bucket 28 through the fixed plates 27. The chain 34 is engaged with the sprocket 33. There are four stirring rollers 35. The stirring rollers 35 are rotatably connected to the bottom of the inner cavity of the device body 1. 5. After the bottom pulley 25 rotates, it can engage with the chain 34. Based on this, it can drive the drive assembly 15 to move left and right. After the chain 34 rotates, it can drive the stirring rollers 35 to rotate through the sprocket 33 inside it. Based on this, the treatment liquid and sewage can be mixed and treated, so that the sewage can be denitrified and dephosphorized.

[0019] The treatment liquid can be fed into the inner cavity of the discharge tank 28 through the feed pipe 30. With the help of the discharge pipe 29, the treatment liquid can be fed into the sewage. When the discharge tank 28 moves, the second stirring rod 31 on its outer wall will come into contact with the sewage, causing the second stirring rod 31 to drive the discharge tank 28 to rotate. At this time, the discharge pipe 29 can be moved to different positions, so that the treatment liquid can be fed into various positions of the sewage, which can effectively improve the treatment efficiency.

[0020] Example 4: An emergency wastewater treatment method for efficient nitrogen and phosphorus removal, comprising the following steps: S1: Move the shielding window 36 to the right, open the sealing plug 14, pour the treatment liquid for nitrogen and phosphorus removal into the inner cavity of the material tank 13, and release the shielding window 36. At this time, the first spring 7 drives the shielding window 36 to reset, so that the locking block 9 can be inserted into the locking slot 8, thus sealing the device body 1; S2: Start the servo motor 16, which drives the belt 24 and pulley 25. The top pulley 25 drives the connecting shaft 17 to rotate. The connecting shaft 17 drives the scraper 19 to rotate through the first stirring rod 18 and the movable column 20. The first stirring rod 18 and the movable column 20 stir and mix the treatment liquid, and the scraper 19 cleans the inner wall of the material tank 13; S3: The bottom The pulley 25 drives one of the sprockets 33 to rotate, and the sprocket 33 can then mesh with the chain 34 it contacts, so that the chain 34 can drive the internal sprocket 33. The sprocket 33 can then drive the stirring roller 35 to rotate, thus stirring the sewage in the inner cavity of the device body 1. S4: When the sprocket 33 rotates, it will drive the material box 13 to move left and right through the drive column 26 and the moving seat 12. At the same time, the fixed plate 27 can also move, and in conjunction with the second stirring rod 31, it will come into contact with the sewage, thereby driving the feeding bucket 28 to rotate. While the feeding bucket 28 is rotating, the treatment liquid is input into the sewage through the feeding pipe 29. After stirring, the sewage can be denitrified and dephosphorized. During operation, the exhaust gas generated can be discharged through the exhaust pipe 5, and the treated sewage can be discharged through the drain pipe 2.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency emergency wastewater treatment device for nitrogen and phosphorus removal, comprising a device body (1) and a shielding assembly (4), characterized in that: An exhaust pipe (5) is installed on the left side of the top of the shielding assembly (4), and a shielding window (36) is movably connected to the right side of the top of the shielding assembly (4); a movable seat (12) is movably connected to the top of the device body (1), a material box (13) is installed on the top of the movable seat (12), a scraper (19) is rotatably connected in the inner cavity of the material box (13), a drive assembly (15) is installed on the outer wall of the material box (13), a connecting shaft (17) is provided in the material box (13), and two... The device body (1) is symmetrically equipped with a first stirring rod (18); the bottom of the movable seat (12) is symmetrically equipped with drive columns (26) at both ends, and fixed disks (27) are symmetrically installed on the opposite side of the two drive columns (26). A feeding bucket (28) is rotatably connected to the center of the opposite side of the two fixed disks (27). Chains (34) are symmetrically installed at the bottom of both ends of the inner cavity of the device body (1). A sprocket (33) is installed in the inner cavity of the chain (34), and a stirring roller (35) is installed on the opposite side of the two sprockets (33). The bottom of the two drive columns (26) are symmetrically rotatably connected to sprockets (33). A servo motor (16) is installed on the outer wall of the drive assembly (15). A belt (24) is installed in the inner cavity of the drive assembly (15). Pulleys (25) are installed at the top and bottom of the belt (24). The top pulley (25) is connected to the connecting shaft (17). The bottom pulley (25) is connected to one end of the sprocket (33). The servo motor (16) is connected to the top pulley (25) through a first rotating shaft. The tops of the two fixed disks (27) are symmetrically equipped with conveying pipes (30), the tops of the conveying pipes (30) are installed at the bottom of the material box (13), the center of the right side of the feeding bucket (28) is equipped with a feeding pipe (29), the outer wall of the feeding bucket (28) is equipped with a second stirring rod (31), there are three second stirring rods (31), and the conveying pipes (30) are connected to the inner cavity of the feeding bucket (28) through the fixed disks (27); The chain (34) meshes with the sprocket (33), and there are four stirring rollers (35). The stirring rollers (35) are rotatably connected to the bottom of the inner cavity of the device body (1).

2. The emergency wastewater treatment device for high-efficiency nitrogen and phosphorus removal according to claim 1, characterized in that: A fixing rod (6) is symmetrically installed on the left side of both ends of the inner cavity of the shielding component (4). A first spring (7) is wound around the outer wall of the fixing rod (6). The left sides of both ends of the shielding window (36) are symmetrically and movably connected to both ends of the inner cavity of the shielding component (4) and sleeved on the outer wall of the fixing rod (6). One end of the first spring (7) is installed in the inner cavity of the shielding component (4), and the other end of the first spring (7) is connected to the shielding window (36).

3. The emergency wastewater treatment device for high-efficiency nitrogen and phosphorus removal according to claim 1, characterized in that: The shielding component (4) has a slot (8) on the side of its inner cavity, and a block (9) is installed on the left side of the shielding window (36). The size of the block (9) and the slot (8) are compatible, and the block (9) is inserted into the inner cavity of the slot (8).

4. The emergency wastewater treatment device for high-efficiency nitrogen and phosphorus removal according to claim 1, characterized in that: The outer wall of the device body (1) is equipped with a drain pipe (2), and transparent windows (3) are symmetrically installed at both ends of the device body (1). Guide grooves (10) are symmetrically opened at both ends of the top of the device body (1). Guide rods (11) are installed in the inner cavity of the guide grooves (10). The two ends of the bottom of the movable seat (12) are symmetrically and movably connected to the inner cavities of the two guide grooves (10) and sleeved on the outer wall of the two guide rods (11).

5. The emergency wastewater treatment device for high-efficiency nitrogen and phosphorus removal according to claim 1, characterized in that: A sealing plug (14) is installed in the center of the top of the material box (13). Movable columns (20) are symmetrically connected in the inner cavity of the two first stirring rods (18). The other end of the movable column (20) is connected to the scraper (19). The outer wall of the scraper (19) is attached to the inner wall of the material box (13).

6. The emergency wastewater treatment device for high-efficiency nitrogen and phosphorus removal according to claim 5, characterized in that: A fixed column (21) is installed in the inner cavity of the first stirring rod (18). A limiting block (22) is installed at the other end of the fixed column (21). A second spring (23) is wound around the outer wall of the fixed column (21). One end of the second spring (23) is installed in the inner cavity of the movable column (20). The other end of the second spring (23) is connected to the movable column (20). The movable column (20) is sleeved on the outer wall of the fixed column (21). The limiting block (22) is movably connected in the inner cavity of the first stirring rod (18).

7. A highly efficient emergency wastewater treatment method for nitrogen and phosphorus removal, employing a highly efficient emergency wastewater treatment device for nitrogen and phosphorus removal as described in any one of claims 1-6, characterized in that: The following steps are included: S1: Move the shielding window (36) to the right, open the sealing plug (14), pour the denitrification and dephosphorization treatment liquid into the inner cavity of the material box (13), and release the shielding window (36). At this time, the first spring (7) drives the shielding window (36) to reset, so that the card block (9) can be inserted into the card slot (8). At this time, the device body (1) can be sealed. S2: Start the servo motor (16), the servo motor (16) drives the belt (24) and pulley (25), the pulley (25) at the top drives the connecting shaft (17) to rotate, the connecting shaft (17) drives the scraper (19) to rotate through the first stirring rod (18) and the movable column (20), the first stirring rod (18) and the movable column (20) stir and mix the treatment liquid, and the scraper (19) cleans the inner wall of the material box (13); S3: The bottom pulley (25) drives one of the sprockets (33) to rotate. The sprocket (33) can then mesh with the chain (34) it contacts, so that the chain (34) can drive the internal sprocket (33). The sprocket (33) can then drive the stirring roller (35) to rotate, so that the sewage in the inner cavity of the device body (1) can be stirred and treated. S4: When the sprocket (33) rotates, it will drive the material box (13) to move left and right through the drive column (26) and the moving seat (12). At the same time, the fixed plate (27) can also move. When the second stirring rod (31) comes into contact with the sewage, it can drive the feeding bucket (28) to rotate. When the feeding bucket (28) rotates, the treatment liquid is input into the sewage through the feeding pipe (29). After stirring, the sewage can be denitrified and dephosphorized. During operation, the generated exhaust gas can be discharged through the exhaust pipe (5), and the treated sewage can be discharged through the drain pipe (2).

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