Integrated sewage treatment device and treatment process

Abstract

The integrated sewage treatment device comprises a treatment tank group, a sealing cover plate is movably installed at the position, located at the upper end, of one side of the treatment tank group, and a digestive juice backflow mechanism is fixedly installed at the position, close to the rear end, of the interior of the treatment tank group; a regulating tank flange interface is fixedly mounted at one corner, close to the upper end, of the rear surface of the treatment tank group, a sludge backflow mechanism and an aeration mechanism are fixedly mounted in the treatment tank group, and a filter tank flange interface is fixedly mounted on one side of the treatment tank group in an embedded manner. According to the integrated sewage treatment device and the treatment process, advanced sludge precipitation in the aerobic tank and the anoxic tank can be avoided through the aeration mechanism, the influence on the sewage treatment effect can be avoided, rainwater can be prevented from entering the treatment tank group through the sealing cover plate, the influence on the sewage treatment effect and efficiency can be avoided, and the sealing cover plate can be opened and closed; the maintenance of the sedimentation tank, the aerobic tank, the anoxic tank and the anaerobic tank and the replacement of the curtain type filler and the inclined tube filler are not influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an integrated sewage treatment device and a treatment process. Background Art

[0002] Wastewater treatment technology refers to the process of purifying wastewater to meet the water quality requirements for discharge into a water body or reuse. These technologies are widely used in many fields, including construction, agriculture, transportation, etc. Wastewater treatment is divided into primary, secondary and tertiary treatment according to the degree of treatment. Primary treatment mainly removes suspended solids, secondary treatment removes organic pollutants, and tertiary treatment further removes difficult-to-degrade organic matter, phosphorus, nitrogen, etc. The development of wastewater treatment technology is of great significance to protecting the environment and improving the utilization rate of water resources;

[0003] However, the existing integrated sewage treatment devices and treatment processes have certain drawbacks when in use. The aerobic tank and the anoxic tank in the traditional integrated sewage treatment device are prone to sludge precipitation in advance, which affects the sewage treatment effect. There are no switch covers on the upper surfaces of the sedimentation tank, aerobic tank, anoxic tank and anaerobic tank. When the sedimentation tank, aerobic tank, anoxic tank and anaerobic tank are closed, it will affect their maintenance and the replacement of curtain packing and inclined tube packing. When the sedimentation tank, aerobic tank, anoxic tank and anaerobic tank are not closed, rainwater will affect the sewage treatment effect and efficiency. Summary of the invention

[0004] The main purpose of the present invention is to provide an integrated sewage treatment device and treatment process, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The integrated sewage treatment device comprises a treatment tank group, a sealing cover plate is movably installed at the upper end of one side of the treatment tank group, a digestate reflux mechanism is fixedly installed inside the treatment tank group near the rear end, a regulating tank flange interface is fixedly installed on the rear surface of the treatment tank group near the upper end corner, a sludge reflux mechanism and an aeration mechanism are fixedly installed inside the treatment tank group, a filter tank flange interface is embedded and fixedly installed on one side of the treatment tank group, and an ultraviolet disinfector, a dosing system and an electric control box are fixedly installed inside the treatment tank group near the front end.

[0007] Preferably, the treatment tank group includes an equipment room, a sedimentation tank, an aerobic tank, an anoxic tank, an anaerobic tank, a movable door and a door handle.

[0008] Preferably, the sedimentation tank is fixedly installed on the rear surface of the equipment room, the aerobic tank is fixedly installed on the rear surface of the sedimentation tank, the anoxic tank is fixedly installed on the rear surface of the aerobic tank, the anaerobic tank is fixedly installed on the rear surface of the anoxic tank, the movable door is movably installed on the front surface edge of the equipment room through hinges, the door handle is fixedly installed on the front surface of the movable door, the sedimentation tank is provided with an inclined tube filler, and the aerobic tank, anoxic tank and anaerobic tank are provided with curtain-type fillers.

[0009] Preferably, the sealing cover plate includes a lower connecting piece, an upper connecting piece, a step cover plate, a sealing rubber frame, an L-shaped strip, a sealing rubber ring and a screw turntable.

[0010] Preferably, there are several lower connecting members, and the lower connecting members are fixedly installed on one side of the sedimentation tank, aerobic tank, anoxic tank and anaerobic tank at the upper end, the upper connecting member is arranged inside the lower connecting member, the ladder cover is fixedly installed on the upper end of the upper connecting member, the sealing rubber frame is fixedly installed on the outer side of the ladder cover, the L-shaped slat is fixedly installed on the upper surface of the ladder cover, the sealing rubber ring is fixedly installed on the upper and lower surfaces of the L-shaped slat, the screw turntable is arranged inside the L-shaped slat, and the lower end of the screw turntable is inserted into the screw hole on the upper surface of the sedimentation tank, aerobic tank, anoxic tank and anaerobic tank.

[0011] Preferably, the digestive liquid reflux mechanism includes a digestive liquid reflux pump and a digestive liquid reflux pipe. The digestive liquid reflux pump is fixedly installed at the bottom of the aerobic tank. One end of the digestive liquid reflux pipe is inserted into the bottom of the anoxic tank. The other end of the digestive liquid reflux pipe is connected to the digestive liquid reflux pump. A valve is provided at the other end of the digestive liquid reflux pipe.

[0012] Preferably, the sludge return mechanism includes a sludge return pipe, a sludge return pump and a connecting pipe, the sludge return pipe is a three-way pipe, the rear end of the sludge return pipe is inserted into the bottom of the anaerobic tank, the sludge return pump is fixedly installed inside the equipment room, the connecting pipe is fixedly connected between the bottom of the sedimentation tank and the sludge return pump, the lower end of the sludge return pipe is fixedly connected to the sludge return pump, two valves are provided on the sludge return pipe, the pipeline connecting the sludge return pipe to the sludge return pump is located between the valves, and a valve is provided in the middle of the connecting pipe.

[0013] Preferably, the aeration mechanism includes a blower, an air pipe and an aeration plate. The blower is fixedly installed inside the equipment room. The air pipe is a three-way pipe. The front end of the air pipe is fixedly connected to the blower. The aeration plate is fixedly installed at the bottom of the aerobic tank and the anoxic tank. The rear end of the air pipe is fixedly connected to the aeration plate.

[0014] Preferably, the specific steps are:

[0015] Step S1: The flange interface of the regulating tank is connected to the sewage pipe, the flange interface of the filter tank is connected to the filter tank, the front end of the sludge return pipe is connected to the sludge tank, and the sewage passes through the anaerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank in sequence. The valve at the rear end of the sludge return pipe and the valve on the connecting pipe are opened, and the sludge return pump pumps the phosphorus-containing return sludge from the bottom of the sedimentation tank to the inside of the anaerobic tank, and the polyphosphate bacteria decompose the polyphosphate in the body and release phosphorus into the water;

[0016] Step S2: the aeration mechanism inflates air into the aerobic tank and the anoxic tank through the inflation pipe, and discharges the air through the aeration plate;

[0017] Step S3: Open the valve on the digestion liquid return pipe, and the digestion liquid return pump introduces the mixed liquid carrying nitrate nitrogen from the aerobic pool into the internal sewage of the anoxic pool through the digestion liquid return pipe for mixing, and the denitrifying bacteria reduce the nitrate nitrogen into nitrogen gas, which escapes into the air;

[0018] Step S4: Aerobic bacteria in the anoxic tank remove organic matter in the water, and nitrifying bacteria nitrify ammonia nitrogen in the water. When the sewage passes through the sedimentation tank, the sedimentation tank separates mud and water, removes suspended solids, and the sludge return mechanism maintains the sludge concentration of the system;

[0019] Step S5: When the sludge in the sedimentation tank is discharged, the valve at the rear end of the sludge return pipe is closed, and the valve at the front end of the sludge return pipe is opened;

[0020] Step S6: When the sedimentation tank is drained, it enters the filter tank through the filter tank flange interface and then passes through the disinfection tank to meet the discharge standards.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In the present invention, the aeration mechanism is provided, and the aeration mechanism can prevent premature sludge precipitation in the aerobic tank and the anoxic tank, thereby affecting the sewage treatment effect;

[0023] The sealing cover can prevent rainwater from entering the treatment tank group, thereby affecting the sewage treatment effect and efficiency. The sealing cover can be opened and closed without affecting the maintenance of the sedimentation tank, aerobic tank, anoxic tank and anaerobic tank, and the replacement of curtain fillers and inclined tube fillers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the integrated sewage treatment device and treatment process of the present invention;

[0025] Figure 2 A cross-sectional view of a treatment tank group of the integrated sewage treatment device and treatment process of the present invention;

[0026] Figure 3 A top view of a treatment tank group of the integrated sewage treatment device and treatment process of the present invention;

[0027] Figure 4 It is a schematic diagram of the sealing cover structure of the integrated sewage treatment device and treatment process of the present invention;

[0028] Figure 5 The integrated sewage treatment device and treatment process of the present invention Figure 4 The enlarged schematic diagram of part A in the middle;

[0029] Figure 6 The integrated sewage treatment device and treatment process of the present invention Figure 4 Enlarged schematic diagram of part B in the middle.

[0030] In the figure: 1. Treatment tank group; 101. Equipment room; 102. Sedimentation tank; 103. Aerobic tank; 104. Anoxic tank; 105. Anaerobic tank; 106. Movable door; 107. Door handle; 2. Sealing cover plate; 201. Lower connecting piece; 202. Upper connecting piece; 203. Ladder cover plate; 204. Sealing rubber frame; 205. L-shaped strip; 206. Sealing rubber ring; 207. Screw turntable; 3. Digestive liquid reflux mechanism; 301, digestive liquid reflux pipe; 302, digestive liquid reflux pump; 4, regulating tank flange interface; 5, sludge reflux mechanism; 501, sludge reflux pipe; 502, sludge reflux pump; 503, connecting pipe; 6, aeration mechanism; 601, blower; 602, inflation pipe; 603, aeration plate; 7, filter tank flange interface; 8, UV sterilizer; 9, dosing system; 10, electrical control box. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] like Figure 1-6 As shown, the integrated sewage treatment device includes a treatment tank group 1, a sealing cover plate 2 is movably installed at the upper end of one side of the treatment tank group 1, a digestate reflux mechanism 3 is fixedly installed near the rear end inside the treatment tank group 1, a regulating tank flange interface 4 is fixedly installed at a corner near the upper end on the rear surface of the treatment tank group 1, a sludge reflux mechanism 5 and an aeration mechanism 6 are fixedly installed inside the treatment tank group 1, a filter tank flange interface 7 is embedded and fixedly installed on one side of the treatment tank group 1, an ultraviolet disinfector 8, a dosing system 9 and an electric control box 10 are fixedly installed near the front end inside the treatment tank group 1, the aeration mechanism 6 can prevent premature sludge precipitation in the aerobic tank 103 and the anoxic tank 104, which affects the sewage treatment effect, the sealing cover plate 2 can prevent rainwater from entering the treatment tank group 1, thereby affecting the sewage treatment effect and efficiency, and the sealing cover plate 2 can be opened and closed without affecting the maintenance of the sedimentation tank 102, the aerobic tank 103, the anoxic tank 104 and the anaerobic tank 105 and the replacement of the curtain filler and the inclined tube filler.

[0033] The treatment tank group 1 includes an equipment room 101, a sedimentation tank 102, an aerobic tank 103, an anoxic tank 104, an anaerobic tank 105, a movable door 106 and a door handle 107; the sedimentation tank 102 is fixedly installed on the rear surface of the equipment room 101, the aerobic tank 103 is fixedly installed on the rear surface of the sedimentation tank 102, the anoxic tank 104 is fixedly installed on the rear surface of the aerobic tank 103, the anaerobic tank 105 is fixedly installed on the rear surface of the anoxic tank 104, the movable door 106 is movably installed on the front surface edge of the equipment room 101 through a hinge, and the door handle 107 is fixedly installed on the front surface of the movable door 106. The sedimentation tank 102 is provided with an inclined tube filler, the aerobic tank 103, the anoxic tank 105 are fixedly installed on the rear surface of the anoxic tank 104, and the movable door 106 is movably installed on the front surface edge of the equipment room 101 through a hinge. The door handle 107 is fixedly installed on the front surface of the movable door 106. 04 and the anaerobic tank 105 are provided with curtain-type fillers; the sealing cover plate 2 includes a lower connecting piece 201, an upper connecting piece 202, a step cover plate 203, a sealing rubber frame 204, an L-shaped slat 205, a sealing rubber ring 206 and a screw turntable 207; there are several lower connecting pieces 201, and the lower connecting piece 201 is fixedly installed at the upper end of one side of the sedimentation tank 102, the aerobic tank 103, the anoxic tank 104 and the anaerobic tank 105, the upper connecting piece 202 is arranged inside the lower connecting piece 201, the step cover plate 203 is fixedly installed at the upper end of the upper connecting piece 202, the sealing rubber frame 204 is fixedly installed on the outer side of the step cover plate 203, the L-shaped slat 205 is fixedly installed on the upper surface of the step cover plate 203, the sealing rubber ring 206 is fixedly installed on the upper and lower surfaces of the L-shaped slats 205, the screw turntable 207 is arranged inside the L-shaped slats 205, and the lower end of the screw turntable 207 is inserted into the screw holes on the upper surfaces of the sedimentation tank 102, the aerobic tank 103, the anoxic tank 104 and the anaerobic tank 105; the digestion liquid reflux mechanism 3 includes a digestion liquid reflux pump 301 and a digestion liquid reflux pipe 302, the digestion liquid reflux pump 301 is fixedly installed at the bottom of the aerobic tank 103, one end of the digestion liquid reflux pipe 302 is inserted into the bottom of the anoxic tank 104, and the other end of the digestion liquid reflux pipe 302 is connected to the digestion liquid reflux pump 301, and the digestion liquid reflux pump 301 is fixedly installed at the bottom of the aerobic tank 103. A valve is provided at the other end of the flow pipe 302; the sludge return mechanism 5 includes a sludge return pipe 501, a sludge return pump 502 and a connecting pipe 503. The sludge return pipe 501 is a three-way pipe. The rear end of the sludge return pipe 501 is inserted into the bottom of the anaerobic tank 105. The sludge return pump 502 is fixedly installed inside the equipment room 101. The connecting pipe 503 is fixedly connected between the bottom of the sedimentation tank 102 and the sludge return pump 502. The lower end of the sludge return pipe 501 is fixedly connected to the sludge return pump 502. Two valves are provided on the sludge return pipe 501. The pipeline connecting the sludge return pipe 501 to the sludge return pump 502 is located between the valves. A valve is provided in the middle of the connecting pipe 503.The aeration mechanism 6 includes a blower 601, an air pipe 602 and an aeration plate 603. The blower 601 is fixedly installed inside the equipment room 101. The air pipe 602 is a three-way pipe. The front end of the air pipe 602 is fixedly connected to the blower 601. The aeration plate 603 is fixedly installed at the bottom of the aerobic tank 103 and the anoxic tank 104. The rear end of the air pipe 602 is fixedly connected to the aeration plate 603.

[0034] The specific steps are as follows: Step S1: the flange interface 4 of the regulating tank is connected to the sewage pipe, the flange interface 7 of the filter tank is connected to the filter tank, the front end of the sludge return pipe 501 is connected to the sludge tank, and the sewage passes through the anaerobic tank 105, the anoxic tank 104, the aerobic tank 103 in sequence to the sedimentation tank 102, the valve at the rear end of the sludge return pipe 501 and the valve on the connecting pipe 503 are opened, and the sludge return pump 502 pumps the phosphorus-containing return sludge from the bottom of the sedimentation tank 102 to the inside of the anaerobic tank 105, and the polyphosphate bacteria decompose the polyphosphate in the body to release phosphorus into the water; Step S2: the aeration mechanism 6 inflates the aerobic tank 103 and the anoxic tank 104 through the inflation pipe 602, and discharges through the aeration plate 603; Step S3: the valve on the digestate return pipe 302 is opened, and the digestate returns to the aerobic tank 103 and the anoxic tank 104. The flow pump 301 introduces the mixed liquid carrying nitrate nitrogen from the aerobic tank 103 into the internal sewage of the anoxic tank 104 through the digestion liquid return pipe 302 for mixing, and the denitrifying bacteria reduce the nitrate nitrogen into nitrogen gas, which escapes into the air; Step S4: aerobic bacteria in the anoxic tank 104 remove organic matter in the water, and nitrifying bacteria nitrify the ammonia nitrogen in the water. When the sewage passes through the sedimentation tank 102, the sedimentation tank 102 performs mud and water separation, removes suspended solids, and the sludge return mechanism 5 maintains the sludge concentration of the system; Step S5: when the sludge in the sedimentation tank 102 is discharged, the valve at the rear end of the sludge return pipe 501 is closed, and the valve at the front end of the sludge return pipe 501 is opened; Step S6: when the sedimentation tank 102 is drained, it enters the filter tank through the filter tank flange interface 7, and then passes through the disinfection tank to meet the discharge standards.

[0035] It should be noted that the present invention is an integrated sewage treatment device and treatment process. When in use, the flange interface 4 of the regulating tank is connected to the sewage pipe, the flange interface 7 of the filter tank is connected to the filter tank, and the front end of the sludge return pipe 501 is connected to the sludge tank. The sewage passes through the anaerobic tank 105, the anoxic tank 104, the aerobic tank 103 in sequence to the sedimentation tank 102. The valve at the rear end of the sludge return pipe 501 and the valve on the connecting pipe 503 are opened, and the sludge return pump 502 pumps the phosphorus-containing return sludge from the bottom of the sedimentation tank 102 to the inside of the anaerobic tank 105, and the polyphosphate-accumulating bacteria decompose the polyphosphate in the body. The acid salt releases phosphorus into the water, the valve on the digestion liquid return pipe 302 is opened, and the digestion liquid return pump 301 introduces the mixed liquid carrying nitrate nitrogen from the aerobic tank 103 into the internal sewage of the anoxic tank 104 through the digestion liquid return pipe 302 for mixing, and the denitrifying bacteria reduce the nitrate nitrogen to nitrogen gas, which escapes into the air. The aerobic bacteria in the anoxic tank 104 remove organic matter in the water, and the nitrifying bacteria nitrify the ammonia nitrogen in the water. When the sewage passes through the sedimentation tank 102, the sedimentation tank 102 performs mud and water separation and removes suspended solids. The sludge return mechanism 5 maintains the sludge concentration of the system, and the sedimentation tank 102 is used for sludge separation. When the sludge in the sedimentation tank 102 is discharged, the valve at the rear end of the sludge return pipe 501 is closed, and the valve at the front end of the sludge return pipe 501 is opened. When the sedimentation tank 102 is drained, it enters the filter tank through the filter tank flange interface 7, and then passes through the disinfection tank to meet the discharge standards. The blower 601 inflates the aerobic tank 103 and the anoxic tank 104 through the inflation pipe 602, and is discharged through the aeration plate 603. The aeration mechanism 6 can prevent the aerobic tank 103 and the anoxic tank 104 from settling in advance, which affects the sewage treatment effect. In the sealing cover plate 2, when it is opened, the L-shaped slat 2 is turned upward. 05, the lower end of the screw turntable 207 can be withdrawn from the screw hole on the upper surface of the treatment tank group 1, and the ladder cover 203 is opened through the lower connecting piece 201 and the upper connecting piece 202. The sealing rubber frame 204 and the sealing rubber ring 206 play a sealing role. The sealing cover 2 can prevent rainwater from entering the treatment tank group 1, thereby affecting the sewage treatment effect and efficiency, and the sealing cover 2 can be opened and closed without affecting the maintenance of the sedimentation tank 102, the aerobic tank 103, the anoxic tank 104 and the anaerobic tank 105 and the replacement of the curtain filler and the inclined tube filler.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Integrated sewage treatment device, characterized by: The invention comprises a treatment tank group (1), wherein a sealing cover plate (2) is movably installed at an upper end of one side of the treatment tank group (1), a digestion liquid return mechanism (3) is fixedly installed inside the treatment tank group (1) near the rear end, a regulating tank flange interface (4) is fixedly installed on a corner of the upper end of the rear surface of the treatment tank group (1), a sludge return mechanism (5) and an aeration mechanism (6) are fixedly installed inside the treatment tank group (1), a filter tank flange interface (7) is embedded and fixedly installed on one side of the treatment tank group (1), and an ultraviolet disinfector (8), a dosing system (9) and an electric control box (10) are fixedly installed inside the treatment tank group (1) near the front end.

2. The integrated sewage treatment device according to claim 1, characterized in that: The treatment tank group (1) comprises an equipment room (101), a sedimentation tank (102), an aerobic tank (103), an anoxic tank (104), an anaerobic tank (105), a movable door (106) and a door handle (107).

3. The integrated sewage treatment device according to claim 2, characterized in that: The sedimentation tank (102) is fixedly installed on the rear surface of the equipment room (101), the aerobic tank (103) is fixedly installed on the rear surface of the sedimentation tank (102), the anoxic tank (104) is fixedly installed on the rear surface of the aerobic tank (103), and the anaerobic tank (105) is fixedly installed on the rear surface of the anoxic tank (104). The movable door (106) is movably installed on the front surface edge of the equipment room (101) through hinges, and the door handle (107) is fixedly installed on the front surface of the movable door (106). The sedimentation tank (102) is provided with an inclined tube filler, and the aerobic tank (103), the anoxic tank (104) and the anaerobic tank (105) are provided with curtain-type fillers.

4. The integrated sewage treatment device according to claim 3, characterized in that: The sealing cover plate (2) comprises a lower connecting piece (201), an upper connecting piece (202), a step cover plate (203), a sealing rubber frame (204), an L-shaped strip (205), a sealing rubber ring (206) and a screw rotating disc (207).

5. The integrated sewage treatment device according to claim 4, characterized in that: The lower connecting pieces (201) are provided in a plurality of numbers. The lower connecting pieces (201) are fixedly installed at the upper end of one side of the sedimentation tank (102), the aerobic tank (103), the anoxic tank (104) and the anaerobic tank (105). The upper connecting piece (202) is provided inside the lower connecting piece (201). The step cover plate (203) is fixedly installed at the upper end of the upper connecting piece (202). The sealing rubber frame (204) is fixedly installed at the step cover plate. The outer side of the plate (203), the L-shaped strip (205) is fixedly installed on the upper surface of the ladder cover plate (203), the sealing rubber ring (206) is fixedly installed on the upper and lower surfaces of the L-shaped strip (205), the screw turntable (207) is arranged inside the L-shaped strip (205), and the lower end of the screw turntable (207) is inserted into the screw holes on the upper surfaces of the sedimentation tank (102), the aerobic tank (103), the anoxic tank (104) and the anaerobic tank (105).

6. The integrated sewage treatment device according to claim 5, characterized in that: The digestive liquid reflux mechanism (3) comprises a digestive liquid reflux pump (301) and a digestive liquid reflux pipe (302). The digestive liquid reflux pump (301) is fixedly installed at the bottom of the aerobic tank (103). One end of the digestive liquid reflux pipe (302) is inserted into the bottom of the anoxic tank (104). The other end of the digestive liquid reflux pipe (302) is connected to the digestive liquid reflux pump (301). A valve is provided at the other end of the digestive liquid reflux pipe (302).

7. The integrated sewage treatment device according to claim 6, characterized in that: The sludge return mechanism (5) comprises a sludge return pipe (501), a sludge return pump (502) and a connecting pipe (503). The sludge return pipe (501) is a three-way pipe. The rear end of the sludge return pipe (501) is inserted into the bottom of the anaerobic tank (105). The sludge return pump (502) is fixedly installed inside the equipment room (101). The connecting pipe (503) is fixedly connected between the bottom of the sedimentation tank (102) and the sludge return pump (502). The lower end of the sludge return pipe (501) is fixedly connected to the sludge return pump (502). Two valves are provided on the sludge return pipe (501). The pipeline connecting the sludge return pipe (501) to the sludge return pump (502) is located between the valves. A valve is provided in the middle of the connecting pipe (503).

8. The integrated sewage treatment device according to claim 7, characterized in that: The aeration mechanism (6) comprises a blower (601), an air charging pipe (602) and an aeration plate (603); the blower (601) is fixedly installed inside the equipment room (101); the air charging pipe (602) is a three-way pipe; the front end of the air charging pipe (602) is fixedly connected to the blower (601); the aeration plate (603) is fixedly installed at the bottom of the aerobic tank (103) and the anoxic tank (104); the rear end of the air charging pipe (602) is fixedly connected to the aeration plate (603).

9. The treatment process of the integrated sewage treatment device according to claims 1-8, characterized in that: The specific steps are: Step S1: The flange interface (4) of the regulating tank is connected to the sewage pipe, the flange interface (7) of the filter tank is connected to the filter tank, the front end of the sludge return pipe (501) is connected to the sludge tank, and the sewage passes through the anaerobic tank (105), the anoxic tank (104), the aerobic tank (103) in sequence to the sedimentation tank (102), the valve at the rear end of the sludge return pipe (501) and the valve on the connecting pipe (503) are opened, and the sludge return pump (502) pumps the phosphorus-containing return sludge from the bottom of the sedimentation tank (102) to the inside of the anaerobic tank (105), and the polyphosphate bacteria decompose the polyphosphate in the body to release phosphorus into the water; Step S2: the aeration mechanism (6) inflates air into the aerobic tank (103) and the anoxic tank (104) through the inflation pipe (602), and discharges the air through the aeration plate (603); Step S3: Open the valve on the digestion liquid return pipe (302), and the digestion liquid return pump (301) introduces the mixed liquid carrying nitrate nitrogen from the aerobic tank (103) into the internal sewage of the anoxic tank (104) through the digestion liquid return pipe (302) to mix, and the denitrifying bacteria reduce the nitrate nitrogen into nitrogen gas, which escapes into the air; Step S4: Aerobic bacteria in the anoxic tank (104) remove organic matter in the water, and nitrifying bacteria nitrify ammonia nitrogen in the water. When the sewage passes through the sedimentation tank (102), the sedimentation tank (102) performs mud and water separation and removes suspended solids. The sludge return mechanism (5) maintains the sludge concentration of the system; Step S5: When the sludge in the sedimentation tank (102) is discharged, the valve at the rear end of the sludge return pipe (501) is closed, and the valve at the front end of the sludge return pipe (501) is opened; Step S6: When the sedimentation tank (102) is drained, it enters the filter tank through the filter tank flange interface (7) and then passes through the disinfection tank to meet the discharge standards.

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