A sewage treatment system and method thereof

Abstract

The application discloses a sewage treatment system and a method thereof, and relates to the field of sewage treatment. The sewage treatment system comprises a sewage pool for storing sewage, a coaming fixedly connected to the outer surface of the sewage pool, a ditch formed by the coaming and the outer surface of the sewage pool, and sewage capable of overflowing from the top of the sewage pool into the ditch. The sewage treatment system further comprises a medicine-water mixing element for mixing the sewage and a medicine, and the medicine-water mixing element is provided with a water outlet, which is located at the upper central position of the sewage pool. The above technical scheme can achieve the purpose of sewage treatment by using only one pool.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more specifically to a wastewater treatment system and method. Background Technology

[0002] A novel integrated wastewater treatment device is disclosed in related technologies, comprising a filtration tank, a dosing tank, a sedimentation tank, and a clear water tank. In the filtration tank, large floating debris is intercepted by the filter screen. Then, the wastewater, driven by a first pump, enters the dosing tank, where the treatment efficiency is further improved by the chemicals used. Next, the wastewater is pumped by a second pump into the sedimentation tank. Because the sedimentation tank contains honeycomb-shaped inclined tubes, sludge cannot enter these tubes, while clear water can. A return pump in the clear water tank pumps the clear water from the honeycomb-shaped inclined tubes back into the clear water tank, ultimately achieving the purpose of wastewater treatment.

[0003] While the above technical solutions can achieve the purpose of sewage treatment, in actual use, the entire sewage treatment process requires the use of multiple tanks. Given the current scarcity of land resources, the use of multiple tanks in the sewage treatment process undoubtedly increases the land cost for enterprises. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide a wastewater treatment system and method to solve the technical problem of excessive construction of tanks during wastewater treatment, which occupies a large area of ​​land.

[0005] First aspect To achieve the above objectives, the present invention provides a wastewater treatment system, comprising: Sewage tanks are used to store sewage. A retaining panel is fixedly connected to the outer surface of the sewage tank, and the retaining panel and the outer surface of the sewage tank form a ditch, allowing sewage to overflow from the top of the sewage tank into the ditch; A chemical mixing component is used to mix sewage and chemicals. The chemical mixing component is provided with an outlet located at the center of the upper part of the sewage tank.

[0006] By adopting the above technical solution, wastewater treatment can be achieved with only one tank. The chemical mixing unit initially mixes wastewater and chemical solution to form a chemical mixture, which is then discharged into the wastewater tank through the outlet. Because the outlet is located at the top center of the wastewater tank, the discharged chemical mixture diffuses radially outward in a cone shape within the tank. Furthermore, the wastewater tank is designed to be relatively high, allowing the chemical mixture to further purify the wastewater stored within as it sinks. Finally, the initially purified wastewater in the tank is continuously purified with the subsequent discharge of the chemical mixture. As the chemical mixture is added, the water level in the wastewater tank rises. Since the chemical mixture diffuses radially, the water in the outer ring of the tank is the clearest. This clear water overflows into the ditch as the water level continues to rise and is eventually discharged.

[0007] Optionally, the bottom of the sewage tank is provided with a sewage outlet, and the sewage treatment system further includes: Fan blades are installed inside the sewage tank, and the fan blades are located above the sewage outlet; A drive unit for driving the fan blades to rotate.

[0008] By adopting the above technical solution, the goal of smoothly discharging sludge can be achieved. During the continuous settling process, the chemical mixture coagulates into sludge, which is then discharged through the drain outlet. However, if the sludge contains few minerals, the coagulated sludge may become compacted during settling. This compacted sludge can clog the drain outlet, hindering effective discharge. To solve this problem, fan blades are installed. Driven by a driving component, these blades continuously rotate, breaking up the coagulated sludge that settles during the process. The broken sludge can then be smoothly discharged from the drain outlet.

[0009] Optional, also includes: The connecting corridor is fixedly connected and spans across the top of the sewage tank; The drive unit is fixedly connected to the connection corridor.

[0010] By adopting the above technical solution, the installation of the drive unit and the maintenance of the chemical mixing unit can be facilitated. The fan blades rely on the drive unit to rotate, and since the fan blades are located inside a relatively high sewage tank, installing the drive unit on the ground floor would require complex connectors to drive the fan blades in the desired direction of rotation. Furthermore, some parts of the connectors would need to pass through the sewage tank, necessitating additional sealing structures to prevent leakage. This would undoubtedly increase the installation difficulty of the drive unit. By setting up a connecting corridor and installing the drive unit there, installation becomes much simpler. Additionally, a motor can be directly selected as the drive unit, with its output shaft directly connected to the fan blades without the need for other connectors, achieving the desired rotation direction. Finally, since the connecting shaft does not interfere with the sewage tank when connecting the fan blades to the motor output shaft, no additional sealing components are required. On the other hand, since the outlet of the chemical mixing unit needs to be located at the center of the sewage tank, setting up a connecting corridor can also facilitate the support of the pipelines in the chemical mixing unit through the connecting corridor.

[0011] Optionally, it also includes an auger, the drive unit drives the auger to rotate, the auger is located below the fan blades, and there is a gap between the free end of the auger and the bottom of the sewage tank.

[0012] By adopting the above technical solution, the goal of breaking up the sludge that has hardened at the bottom of the sewage tank can be achieved. While the fan blades can prevent sludge hardening, and because a water pump is connected to the sewage tank's discharge outlet during sewage treatment, sludge hardening generally only occurs during the process of the chemical mixture entering the sewage tank and settling onto the fan blades. Once the sludge passes the fan blades, due to the proximity of the blades to the discharge outlet, it continues to settle without hardening. However, if the sewage tank stops operating due to unforeseen circumstances, such as a power outage or production shutdown, the sludge left stagnant in the tank for an extended period may harden. When this happens, upon restarting the sewage treatment process, the hardened sludge at the bottom of the tank will clog the discharge outlet, thus affecting subsequent sludge dewatering. To solve this technical problem, an auger is installed. When the sludge at the bottom of the sewage tank hardens, the sludge hardened on the auger is continuously fed downwards as the auger rotates. During this downward movement, the hardened sludge is constantly compressed against itself, thus crushing the sludge hardened on the auger. The crushed sludge flows out from the free end of the auger and enters the gap. The sludge in the gap has a higher pressure, resulting in an outward compressive force that breaks down the hardened sludge surrounding the auger, ultimately achieving the goal of breaking up large pieces of sludge hardened on the auger.

[0013] Optionally, the bottom of the sewage tank has multiple wavy stripes, and the wavy stripes and the gaps are interconnected.

[0014] By adopting the above technical solution, the breaking up of compacted sludge at the bottom of the sewage tank can be further enhanced. Because the bottom of the sewage tank uses wavy stripes, the sludge at the bottom will also have an irregular shape when it compacts. Due to the greater stress concentration points, this type of compacted sludge is easier to break up. On the other hand, the sludge particles crushed by the auger can quickly fill the gaps between the wavy stripes and the bottom of the compacted sludge. After filling, the sludge particles exert an upward impact force on the compacted sludge, and also exert a horizontal outward divergent compressive force. Therefore, the sludge particles can apply impact forces to the compacted sludge from various angles, making the compacted sludge easier to break up.

[0015] Optionally, the pitch of the auger gradually decreases from top to bottom.

[0016] By adopting the above technical solution, the breaking up of compacted sludge at the bottom of the sewage tank can be further enhanced. While the omnidirectional impact force of sludge particles can enhance the breaking up of compacted sludge, the easily breakable zone of compacted sludge exists at the same height as the gaps. The compacted sludge mounted on the auger can detach from the auger, making this section very difficult to break up, ultimately affecting sewage treatment efficiency. To solve this technical problem, the auger is designed with a gradual change in direction. After the compacted sludge detaches from the auger, it will continuously move upward under the upward force of the sludge particles below, colliding with the auger and thus breaking up the compacted sludge that has detached from the auger.

[0017] Optionally, the fan blades and the sidewall of the sewage tank abut against each other.

[0018] By adopting the above technical solution, the hardened sludge formed when the drug mixture sinks to the horizontal surface where the fan blade is located can be broken up by the fan blade.

[0019] Optionally, the drug mixing component includes: A drug liquid pipe is used to transport flocculant. Part of the drug liquid pipe is fixedly connected to the connecting corridor, and a drug outlet is opened on the drug liquid pipe. A sewage pipe is used to transport sewage. Part of the sewage pipe is fixedly connected to the connecting corridor, and an outlet is provided on the sewage pipe. The medicine pipe is fixedly connected to the connecting corridor. The medicine pipe has a medicine inlet and a medicine outlet. The medicine outlet and the liquid outlet are both connected to the medicine inlet. The medicine outlet is the water outlet.

[0020] By adopting the above technical solution, the goal of smooth pipeline transportation of wastewater and chemicals after mixing can be achieved. Due to the relatively high height of the wastewater tank in this application, attention must be paid to the mixing time of the wastewater and chemicals. If the chemicals and wastewater are mixed on the ground floor and then transported through pipelines, a large amount of hardened sludge will inevitably accumulate in the pipeline during the long-term transportation of the chemical mixture, thus affecting subsequent transportation of the chemical mixture. To solve this technical problem, the wastewater pipe and chemical pipe are used to transport the medium independently, while the confluence point of the wastewater and flocculant is located at the inlet of the chemical pipe. Therefore, the mixing of wastewater and flocculant only occurs in the chemical pipe, reducing the transportation path of the chemical mixture. A small amount of sludge will accumulate in the chemical pipe, and since the chemical pipe is fixedly connected to the connecting corridor, operators can easily stand in the connecting corridor to clean the hardened sludge in the chemical pipe.

[0021] Optionally, the medicine tube has a notch.

[0022] By adopting the above technical solution, it is possible to facilitate the cleaning of residual hardened sludge in the chemical pipes by operators.

[0023] Second aspect This invention provides a wastewater treatment method, utilizing the aforementioned wastewater treatment system, comprising the following steps: Adding wastewater: Connect the wastewater pipe and the wastewater outlet of the sand separator to each other; Adding the medicine: Add the medicine to the medicine tube; Removal of compacted sludge: Start the drive unit, which in turn drives the fan blades to rotate; Purifying wastewater from sludge: Connect the drain outlet and the inlet of the filter press to each other. The filter press will press out the wastewater from the sludge, and the wastewater will flow out as clean water through the permeation of the filter cloth of the filter press.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting the outlet of the chemical mixing unit at the center of the top of the sewage tank, the purpose of sewage treatment can be achieved with only one tank. 2. By installing fan blades, the sludge can be discharged smoothly; 3. By installing an auger, the sludge that has hardened at the bottom of the sewage tank can be broken up; 4. By setting wavy stripes, the breaking up of the hardened sludge at the bottom of the sewage tank can be further enhanced; 5. By gradually changing the pitch of the screw conveyor, the breaking up of the hardened sludge at the bottom of the sewage tank can be further enhanced. Attached Figure Description

[0025] Figure 1 This is a perspective view of a wastewater treatment system according to this application; Figure 2 This is a partial perspective view of a wastewater treatment system according to this application; Figure 3 This is a partial cross-sectional view of the bottom of a wastewater tank in a wastewater treatment system according to this application; Figure 4 This is a cross-sectional exploded view of the sludge and screw conveyor of a wastewater treatment system according to this application.

[0026] In the picture: 1. Sewage tank; 11. Sewage outlet; 12. Overflow outlet; 13. Gap; 14. Corrugated stripe; 2. Enclosure panel; 3. Chemical mixing component; 31. Water outlet; 32. Chemical pipe; 321. Chemical outlet; 33. Sewage pipe; 331. Liquid outlet; 34. Chemical pipe; 341. Chemical inlet; 342. Chemical outlet; 343. Notch; 4. Fan blade; 5. Drive component; 51. Motor; 52. Rotating shaft; 6. Connecting corridor; 61. Connecting corridor body; 62. Connecting plate; 7. Screw auger; 8. Spiral staircase; 9. Cemented sludge; 91. Upper sludge; 92. Lower sludge. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-4 The following describes some embodiments of the present invention in detail.

[0028] One wastewater treatment system disclosed in this application is a mechanical device used in the subsequent treatment process of a sand and soil separator. During the operation of the sand and soil separator, the incoming sand and soil are separated under its action. The separated sand and gravel are used for construction, while the separated soil contains a large amount of water, which is the wastewater material to be treated in this application.

[0029] In existing wastewater treatment processes, flocculants are typically used for purification. Under the action of flocculants, sludge settles directly to the bottom, while the water above the sludge undergoes preliminary purification. On one hand, the pre-purified wastewater enters the next purification process until relatively pure water is obtained. This purified water is then used again in a sand separator to separate sand and soil. On the other hand, the settled sludge enters a filter press, where it is processed to produce a dried sludge cake and relatively pure water. This purified water is also used in a sand separator. It is important to note that the pre-purified wastewater, due to its high sludge content, cannot be directly fed into the sand separator.

[0030] First aspect Please see Figure 1-3 As shown, the present invention provides a sewage treatment system, including: a sewage tank 1, a surrounding panel 2, a chemical mixing component 3, a fan blade 4, a drive component 5, a connecting corridor 6, and an auger 7.

[0031] Please see Figure 1 As shown, sewage tank 1 is used to store sewage. In this embodiment, sewage tank 1 adopts a cylindrical, open-top design; in other embodiments, sewage tank 1 adopts a cubic, open-top design. The depth of sewage tank 1 is approximately 8 meters, and its capacity is 1800 cubic meters. A sewage outlet 11 is provided at the bottom of sewage tank 1. The sewage outlet 11 is connected to a water pump (not shown in the figure) and a filter press (not shown in the figure), so that the sludge settled at the bottom of sewage tank 1 can be transported to the filter press for filtration.

[0032] Please continue reading. Figure 2As shown, the chemical mixing unit 3 is used to mix wastewater and chemicals, which are then discharged into the wastewater tank 1. The chemical mixing unit 3 includes a chemical liquid pipe 32, a wastewater pipe 33, and a chemical water pipe 34. The chemical liquid pipe 32 has a "7"-shaped design, with its upper opening being the outlet 321 and its lower opening being the inlet. In this embodiment, the chemical is a flocculant. The wastewater pipe 33 also has a "7"-shaped design, with its upper opening being the outlet 331 and its lower opening being the inlet. The inlet receives soil containing a large amount of water, separated by a sand separator. The chemical water pipe 34 is an inclined pipe, and a notch 343 is provided along its axial direction, resulting in a semi-circular longitudinal section. Furthermore, the outlet 321 of the chemical solution pipe 32 and the outlet 331 of the sewage pipe 33 are both located above the chemical solution pipe 34, allowing the flocculant flowing from the chemical solution pipe 32 and the sewage flowing from the sewage pipe 33 to enter the chemical solution pipe 34 for mixing. The outlet 342 of the chemical solution pipe 34 is located at the center of the upper part of the sewage tank 1, allowing the pre-mixed chemical solution to be discharged into the very center of the sewage tank 1.

[0033] Please refer to it again. Figure 2 As shown, the top of the sewage tank 1 has multiple overflow ports 12 arranged in an equal circumferential array along the axis of the sewage tank 1. A surrounding plate 2 is installed on the upper outer surface of the sewage tank 1. The surrounding plate 2 adopts a stepped ring design, so that the surrounding plate 2 and the outer surface of the sewage tank 1 form a channel. The outer ring water in the sewage tank 1 can overflow from the overflow port 12 or the top of the sewage tank 1 into the channel.

[0034] Please see Figure 1 As shown, to ensure the upper parts of the chemical solution pipe 32, sewage pipe 33, and chemical water pipe 34 can be supported and fixed, and to allow operators to easily clean the sludge from the chemical water pipe 34, a connecting corridor 6 is installed above the sewage tank 1. The left and right ends of the connecting corridor 6 are connected to a staircase, thus ensuring the connecting corridor 6 is stably fixed above the sewage tank 1. To solve space constraints, a spiral staircase 8 is used here. The connecting corridor 6 includes a connecting corridor body 61 and a connecting plate 62. The two ends of the connecting corridor body 61 are fixedly connected to the spiral staircase 8. Please refer to... Figure 2As shown, the connecting plate 62 adopts a box design with openings on the left and front. A connecting rod (not shown in the figure) is fixedly connected inside the connecting plate 62. The front side of the connecting plate 62 is fixedly mounted on the connecting corridor body 61. The upper part of the chemical pipe 34 and the upper part of the sewage pipe 33 are fixedly connected to the connecting plate 62. The chemical pipe 32 is fixedly connected to the inside of the connecting plate 62 via the connecting rod, so that when the operator walks on the connecting corridor body 61, he / she can use cleaning tools to clean the residual sludge inside the chemical pipe 34.

[0035] Please see Figure 3 As shown, a fan blade 4 is installed at the bottom of the sewage tank 1, with the fan blade 4 approximately 1 meter away from the bottom of the sewage tank 1. The outer contour of the fan blade 4 abuts against the inner wall of the sewage tank 1. Please refer to... Figure 1 As shown, a drive unit 5 is installed on the connecting corridor body 61, which drives the rotation of the fan blade 4. The drive unit 5 includes a motor 51 and a rotating shaft 52. The motor 51 is mounted on the connecting corridor 6, the rotating shaft 52 is fixedly connected to the power shaft of the motor 51, and the rotating shaft 52 is fixedly connected to the fan blade 4. To control the rotational speed of the fan blade 4, a speed reducer can be connected between the rotating shaft 52 and the fan blade 4 to control the rotational speed of the fan blade 4.

[0036] Please continue reading. Figure 3 As shown, an auger 7 is also fixedly connected to the rotating shaft 52. The auger 7 is located below the fan blade 4. The pitch of the auger 7 gradually decreases from top to bottom. There is a gap 13 between the bottom end of the auger 7 and the bottom of the sewage tank 1. In addition, the bottom of the sewage tank 1 is provided with multiple wavy stripes 14.

[0037] The working principle of this invention is described below: Please see Figure 2As shown, the soil containing a large amount of water, separated by the sand separator, is then transported in sewage pipe 33 by a water pump. The flocculant is then transported in chemical solution pipe 32 by the same pump. The separately transported sewage and flocculant then enter chemical solution pipe 34, achieving initial mixing. The mixed chemical solution is finally discharged from the very center of sewage tank 1. Because the chemical solution is located at the very center of sewage tank 1, on the one hand, the discharged chemical solution diffuses in a radial cone shape outwards from the outlet 31 within sewage tank 1; on the other hand, the sewage tank 1 is designed to be relatively high, and the chemical solution, as it continuously settles, further purifies the sewage stored in sewage tank 1. Finally, the wastewater in wastewater tank 1, which has been initially purified, is continuously purified as the subsequent chemical mixture is discharged into it. As the chemical mixture is discharged into wastewater tank 1, the water level in wastewater tank 1 will also continuously increase. Since the chemical mixture is radioactively diffused, the water in the outer ring of the liquid surface in wastewater tank 1 is the clearest. As the liquid level continues to rise, the clear water in the outer ring of the liquid surface in wastewater tank 1 will overflow into the ditch and finally be discharged from the clear water outlet (not shown in the figure) opened outside the enclosure 2 to be used in the sand and soil separators in each workshop.

[0038] Because wastewater tank 1 is relatively high, the chemical mixture takes a long time to settle. If the sludge has a low mineral content at this point, it is very likely to clump together during settling. This can severely clog the discharge outlet 11 of wastewater tank 1, thus affecting the normal operation of the subsequent sludge dewatering process. Please refer to... Figure 3 As shown, by setting the fan blades 4, the compacted sludge 9 can be broken up, allowing the sludge to settle in a granular state and finally enter the filter press process from the discharge port 11. In addition, the fan blades 4 and the auger 7 provide a certain amount of power for the sludge to settle, and the bottom of the sewage tank 1 uses corrugated stripes 14, which further ensures that the lumpy sludge is broken up. Ultimately, this ensures that the sludge entering the filter press is in a granular state.

[0039] If the factory experiences a power outage or production stoppage, the sludge that has settled to the bottom of wastewater tank 1 may become compacted. Please refer to [link / reference needed]. Figure 4 As shown, the compacted sludge 9 has a cylindrical structure design. For ease of subsequent description, the compacted sludge 9 is divided into an upper compacted sludge 91 and a lower compacted sludge 92. The upper compacted sludge 91 has a auger groove in the middle that cooperates with the auger 7. The lower compacted sludge 92 is solid. Furthermore, because the lower compacted sludge 92 is in contact with the bottom of the sewage tank 1, the bottom of the lower compacted sludge 92 forms an uneven, irregularly shaped surface. It is worth noting that this irregularly shaped surface does not cooperate with the bottom surface of the sewage tank 1; there are pores between the irregularly shaped surface and the bottom surface of the sewage tank 1.

[0040] When power is restored to the plant or production resumes, motor 51 is started, driving the auger 7 to rotate. The sludge in the upper sludge 91 located between the auger 7 continuously moves downwards under the action of the auger 7. On one hand, the sludge in the upper sludge 91 located between the auger 7 is squeezed against each other, thus becoming granular sludge. On the other hand, as the sludge particles move downwards, the middle part of the lower sludge 92 is subjected to a large impact force. Since the bottom surface of the lower sludge 92 is irregularly shaped, the stress concentration causes the middle part of the lower sludge 92 to rapidly break and crumble. This part of the sludge, along with the sludge particles in the auger 7, is also rapidly turned into sludge particles under the squeezing force, and then enters the pores formed between the lower sludge 92 and the bottom of the sewage tank 1. The sludge particles entering the pores exert an upward recoil force on the lower sludge 92, causing the upper sludge 91 and the auger 7 to move relative to each other. Since the auger 7 has a gradient design, the sludge 9 is further broken up during the collision with the auger 7. In other embodiments, the maximum pitch of the auger 7 is the same as the inner wall design of the wastewater tank 1, thus achieving complete breaking up of the sludge 9. The completely broken sludge 9 then collides further with the bottom surface of the wastewater tank 1 under the action of the fan blades 4 and the auger 7, ultimately achieving complete sludge breakage before entering the filter press process.

[0041] Second aspect This invention provides a wastewater treatment method, utilizing a wastewater treatment system according to a first aspect, comprising the following steps: S1: Adding wastewater: Connect wastewater pipe 33 to the wastewater outlet of the sand separator.

[0042] S2: Adding potion: Add the potion to the potion tube 34.

[0043] S3: Removal of compacted sludge 9: Start drive component 5, which in turn drives the fan blade 4 to rotate.

[0044] S4: Purify the wastewater in the sludge: Connect the drain outlet 11 to the inlet of the filter press. The filter press will press out the wastewater in the sludge, and the wastewater will flow out as clean water through the permeation of the filter cloth of the filter press.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wastewater treatment system, characterized in that, include: Wastewater tank (1), used to store wastewater; The enclosure (2) is fixedly connected to the outer surface of the sewage tank (1). The enclosure (2) and the outer surface of the sewage tank (1) form a ditch. Sewage can overflow from the top of the sewage tank (1) into the ditch. The clear water in the outer ring of the sewage tank (1) will overflow from the top of the sewage tank (1) into the ditch after the liquid level continues to rise. The chemical mixing component (3) is used to mix sewage and chemicals. The chemical mixing component (3) is provided with an outlet (31). The outlet (31) is located at the center of the sewage tank (1) above, so that the discharged chemical mixture diffuses in the sewage tank in a radial cone shape from the outlet. The sewage tank (1) is provided with a sewage outlet (11) at the bottom. Fan blades (4) are installed inside the sewage tank (1), and the fan blades (4) are located above the sewage outlet (11); A drive unit (5) is used to drive the fan blades (4) to rotate; Screwdriver (7), driven by the drive unit (5), rotates the screwdriver (7), which is located below the fan blade (4), and there is a gap (13) between the free end of the screwdriver (7) and the bottom of the sewage tank (1). The bottom of the sewage tank (1) has multiple wavy stripes (14), and the wavy stripes (14) and the gaps (13) are interconnected.

2. The wastewater treatment system according to claim 1, characterized in that, Also includes: Connecting corridor (6), fixedly connected and spanning the top of the sewage tank (1); The drive unit (5) is fixedly connected to the connection corridor (6).

3. The wastewater treatment system according to claim 1, characterized in that: The pitch of the auger (7) gradually decreases from top to bottom.

4. A wastewater treatment system according to any one of claims 1-3, characterized in that: The fan blade (4) and the side wall of the sewage tank (1) abut against each other.

5. A wastewater treatment system according to any one of claims 2-3, characterized in that, The drug mixture (3) includes: The liquid pipe (32) is used to transport flocculant. Part of the liquid pipe (32) is fixedly connected to the connecting corridor (6), and the liquid pipe (32) is provided with a drug outlet (321). A sewage pipe (33) is used to transport sewage. Part of the sewage pipe (33) is fixedly connected to the connecting corridor (6), and an outlet (331) is provided on the sewage pipe (33). The medicine pipe (34) is fixedly connected to the connecting corridor (6). The medicine pipe (34) is provided with a medicine inlet (341) and a medicine outlet (342). The medicine outlet (321) and the liquid outlet (331) are both connected to the medicine inlet (341). The medicine outlet (342) is the water outlet (31).

6. A wastewater treatment system according to claim 5, characterized in that, The medicine pipe (34) has a notch (343).

7. A wastewater treatment method, utilizing a wastewater treatment system as described in claim 5, characterized in that, Includes the following steps: Adding wastewater: Connect the wastewater pipe (33) to the wastewater outlet of the sand separator; Adding the medicine: Add the medicine to the medicine tube (34); Removal of compacted sludge (9): Start the drive unit (5), which in turn drives the fan blades (4) to rotate; Purifying wastewater in sludge: Connect the drain outlet (11) and the inlet of the filter press to each other. The filter press will press out the wastewater in the sludge, and the wastewater will flow out as clean water under the permeation of the filter cloth of the filter press.

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