Sewage treatment integrated device based on AAO principle

Abstract

The utility model relates to a sewage treatment integrated device based on an AAO principle. The sewage treatment integrated device comprises a deslagging and sand setting unit, an A-A-O biological treatment unit, a precipitation unit, a coagulation filtering unit and a disinfection water outlet unit which are sequentially communicated along the water flow direction, the deslagging and sand setting unit is used for removing scum and sand grains in the sewage and introducing the sewage into the A-A-O biological treatment unit; the A-A-O biological treatment unit is used for removing pollutants such as carbon, nitrogen and phosphorus in the sewage treated by the deslagging and sand setting unit through activated sludge; the precipitation unit is used for separating gas and cement in the mud-water mixed liquid treated by the A-A-O biological treatment unit; the coagulation and filtration unit is used for further removing suspended matters and soluble pollutants in the supernate precipitated and separated by the precipitation unit; and the disinfection water outlet unit is used for disinfecting and sterilizing the outlet water filtered by the coagulation filtering unit, and storing and discharging the outlet water. The utility model has the advantages of compact structure, improved working efficiency, saved engineering investment and land occupation, low operation cost and good treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of urban and rural sewage treatment technology, and specifically to an integrated sewage treatment device based on the AAO principle. Background Technology

[0002] In the field of wastewater treatment, biological methods are currently the most mainstream approach. The mainstream process that effectively removes organic pollutants and simultaneously denitrifies and phosphorus-removes, while meeting the high effluent standards and high-quality development requirements of wastewater treatment plants, is the AAO biological tank + sedimentation + filtration + disinfection process. However, traditional methods of this process, regardless of whether they are reinforced concrete, steel, or other structures, suffer from drawbacks such as numerous structures, large footprint, high energy consumption due to internal recirculation, high investment, and low efficiency. Summary of the Invention

[0003] This utility model addresses the above-mentioned problems by providing an integrated wastewater treatment device based on the AAO principle, which aims to reduce operating energy consumption, save land, reduce investment, and improve efficiency.

[0004] To solve the above problems, the technical solution provided by this utility model is as follows:

[0005] An integrated wastewater treatment device based on the AAO principle comprises, sequentially connected along the water flow direction, a sludge and grit removal unit, an AAO biological treatment unit, a sedimentation unit, a coagulation and filtration unit, and a disinfection effluent unit, wherein:

[0006] The slag removal and grit removal unit is used to remove scum and sand particles from the wastewater and introduce the wastewater into the AAO biological treatment unit;

[0007] The AAO biological treatment unit is used to remove pollutants such as carbon, nitrogen, and phosphorus from the wastewater after it has been treated by the sludge removal and grit removal unit using activated sludge.

[0008] The sedimentation unit is used to separate the aerated cement from the mud-water mixture after the AAO biological treatment unit.

[0009] The coagulation and filtration unit is used to further remove suspended solids and dissolved contaminants from the supernatant after sedimentation and separation by the precipitation unit;

[0010] The disinfection effluent unit is used to disinfect and sterilize the effluent filtered by the coagulation filtration unit, and then store and discharge it.

[0011] Preferably, the slag removal and sand settling unit includes an inlet culvert, a screen sand settling channel, a fine screen, a sand discharge hopper, a sand storage tank, and a first orifice, wherein:

[0012] One end of the inlet pipe is connected to the sewage pipe network, and the other end is connected to the grit chamber, and is used to introduce sewage into the grit chamber; the grit chamber is equipped with the fine screen and the sand discharge hopper; the grit chamber is connected to the anaerobic zone of the AAO biological treatment unit through the first hole at the outlet; the sand storage tank is provided below the sand discharge hopper.

[0013] Preferably, the AAO biological treatment unit includes the anaerobic zone, the anoxic zone, and the aerobic zone, wherein:

[0014] The anaerobic zone is connected to the anoxic zone through a second hole; the anoxic zone is connected to the aerobic zone through a third hole; a through-wall reflux pump is installed at the wall where the aerobic zone and the anoxic zone share a wall; the through-wall reflux pump is used to pump the mud-water mixture in the aerobic zone to the anoxic zone; a fourth hole and a vent are provided at the wall where the aerobic zone and the sedimentation zone of the sedimentation unit share a wall; the vent is located above the fourth hole.

[0015] Preferably, submersible mixers are installed inside the anaerobic zone, the anoxic zone, and the aerobic zone.

[0016] Preferably, the aerobic zone is equipped with an aeration device.

[0017] Preferably, the sedimentation unit includes the sedimentation zone, the motor well, and the sludge collection well, wherein:

[0018] The sedimentation zone is provided with a sludge collection trough, a screw sludge discharge device, a three-phase separator, an inclined tube sedimentation tank, and a water collection trough in sequence from bottom to top; one end of the sedimentation zone is connected to the sludge collection well through the sludge collection trough, and the other end is connected to the motor well through the screw sludge discharge device;

[0019] The screw sludge discharge device is installed inside the sludge collection tank; the three-phase separator is used to separate the gas, water and sludge in the mud-water mixture flowing into the sedimentation zone through the fourth hole, and to return the separated gas to the aerobic zone through the vent, to input the separated water into the inclined tube sedimentator, and to deposit the separated sludge into the sludge collection tank; the water collection tank is used to collect the supernatant after sedimentation, and then the water collection tank passes through the fifth and sixth holes to discharge the supernatant into the coagulation zone of the coagulation filtration unit.

[0020] Preferably, a motor is installed inside the motor well; the motor is used to drive the screw sludge discharge device to rotate, and then push the sludge into the sludge collection well.

[0021] Preferably, the sludge collection well is equipped with a sludge lifting pump and a sludge discharge pipe; the sludge lifting pump is used to lift the sludge to the anaerobic zone; the sludge discharge pipe is used to discharge the remaining sludge; one end of the sludge discharge pipe is connected to the sludge collection well, and the other end is connected to the sludge treatment facility.

[0022] Preferably, the coagulation and filtration unit includes a coagulation zone, a flocculation zone, and a filtration zone, wherein:

[0023] The coagulation zone is connected to the flocculation zone through the seventh hole; the flocculation zone is connected to the filtration zone through the eighth hole; the filtration zone is equipped with filter media and a sludge discharge trough; the filtration zone is connected to the disinfection water storage tank of the disinfection effluent unit through the ninth hole; the sludge discharge trough is used to collect and discharge the sludge water from backwashing the filter media.

[0024] Preferably, the disinfection water outlet unit includes the disinfection water storage tank, the clean water outlet pipe, and the backwashing device; the backwashing device is located inside the disinfection water storage tank and is used to pump out the clean water in the disinfection water storage tank and backwash the filter media; the clean water outlet pipe is located at the end of the disinfection water storage tank; one end of the clean water outlet pipe is connected to the disinfection water storage tank, and the other end is connected to the water metering device or the utilization device.

[0025] Compared with the prior art, this utility model has the following advantages:

[0026] 1. Because this utility model integrates the traditional sewage treatment processes of grit removal, AAO biological treatment, sedimentation, coagulation filtration, and disinfection into a single tank unit structure, it achieves the advantages of fewer structures, less land occupation, less investment, and lower operating energy consumption.

[0027] 2. Because the structure of this utility model enables continuous water inflow and outflow, it improves operating efficiency. Attached Figure Description

[0028] Figure 1 This is a plan view of an integrated wastewater treatment device based on the AAO principle, according to a specific embodiment of this utility model.

[0029] Figure 2 This is a cross-sectional structural diagram of an integrated wastewater treatment device based on the AAO principle, according to a specific embodiment of this utility model.

[0030] Figure 3 This is a cross-sectional structural diagram of an integrated wastewater treatment device based on the AAO principle, which is a specific embodiment of this utility model.

[0031] The system includes: A. Slag and grit removal unit, BAAO biological treatment unit, C. Sedimentation unit, D. Coagulation and filtration unit, E. Disinfection and effluent unit, 1. Inlet culvert, 2. Grille and grit removal channel, 3. Fine grille, 4. Sand discharge hopper, 5. Sand storage tank, 6. First opening, 7. Anaerobic zone, 8. Second opening, 9. Anoxic zone, 10. Third opening, 11. Aerobic zone, 12. Aeration device, 13. Through-wall return pump, 14. Submersible mixer, 15. Fourth opening, 16. Sedimentation zone, 17. Three-phase separator. 18. Ventilation hole; 19. Inclined tube sedimentation tank; 20. Water collection tank; 21. Sludge collection tank; 22. Screw sludge discharge device; 23. Motor well; 24. Sludge collection well; 25. Sludge lifting pump; 26. Sludge discharge pipe; 27. Fifth hole; 28. Sixth hole; 29. ​​Coagulation zone; 30. Seventh hole; 31. Flocculation zone; 32. Eighth hole; 33. Filtration zone; 34. Filter media; 35. Ninth hole; 36. Disinfection storage tank; 37. Clear water outlet pipe; 38. Backwashing device; 39. Sludge discharge trough. Detailed Implementation

[0032] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0033] like Figure 1 , Figure 2 , Figure 3 As shown, an integrated wastewater treatment device based on the AAO principle includes a sludge and grit removal unit A, an AAO biological treatment unit B, a sedimentation unit C, a coagulation and filtration unit D, and a disinfection effluent unit E, which are connected sequentially along the water flow direction.

[0034] The slag and grit removal unit A is used to remove scum and sand particles from the wastewater and introduce the wastewater into the AAO biological treatment unit B.

[0035] AAO biological treatment unit B is used to remove pollutants such as carbon, nitrogen, and phosphorus from wastewater that has been treated by sludge removal and grit removal unit A using activated sludge.

[0036] Sedimentation unit C is used to separate the aerated cement from the mud-water mixture after treatment by AAO biological treatment unit B.

[0037] The coagulation and filtration unit D is used to further remove suspended solids and dissolved contaminants from the supernatant after sedimentation and separation by the precipitation unit C.

[0038] The disinfection effluent unit E is used to disinfect and sterilize the effluent filtered by the coagulation and filtration unit D, and then store and discharge it.

[0039] It should be noted that the slag removal and sand settling unit A includes an inlet culvert 1, a screen sand settling channel 2, a fine screen 3, a sand discharge hopper 4, a sand storage tank 5, and a first orifice 6, wherein:

[0040] One end of the inlet pipe culvert 1 is connected to the sewage pipe network, and the other end is connected to the grit chamber 2, which is used to introduce sewage into the grit chamber 2. The grit chamber 2 is equipped with a fine screen 3 and a sand discharge hopper 4. The grit chamber 2 is connected to the anaerobic zone 7 of the AAO biological treatment unit B through the first hole 6 located at the outlet. The sewage after sludge removal and sand settling flows into the anaerobic zone 7 through the first hole 6. A sand storage tank 5 is set below the sand discharge hopper 4. The sand particles in the sand discharge hopper 4 are discharged into the sand storage tank 5 through pipes and valves.

[0041] It should be noted that AAO biological treatment unit B includes anaerobic zone 7, anoxic zone 9, and aerobic zone 11, wherein:

[0042] Anaerobic zone 7 is connected to anoxic zone 9 through second hole 8; anoxic zone 9 is connected to aerobic zone 11 through third hole 10; a through-wall reflux pump 13 is installed at the wall where aerobic zone 11 and anoxic zone 9 share a wall; the through-wall reflux pump 13 is used to pump the mud-water mixture in aerobic zone 11 to anoxic zone 9; a fourth hole 15 and a vent 18 are installed at the wall where aerobic zone 11 and sedimentation zone 16 of sedimentation unit C share a wall; the vent 18 is located above the fourth hole 15, and the mud-water mixture in aerobic zone 11 flows into sedimentation zone 16 through the fourth hole 15.

[0043] It should be further noted that submersible mixers 14 are installed inside the anaerobic zone 7, the anoxic zone 9, and the aerobic zone 11, respectively.

[0044] It should be further noted that an aeration device 12 is installed inside the aerobic zone 11.

[0045] It should be noted that sedimentation unit C includes sedimentation zone 16, motor well 23, and sludge collection well 24, wherein:

[0046] The sedimentation zone 16 is provided with a sludge collection trough 21, a screw sludge discharge device 22, a three-phase separator 17, an inclined tube sedimentation tank 19, and a water collection trough 20 arranged sequentially from bottom to top. One end of the sedimentation zone 16 is connected to the sludge collection well 24 through the sludge collection trough 21, and the other end is connected to the motor well 23 through the screw sludge discharge device 22.

[0047] The screw sludge discharge device 22 is installed inside the sludge collection tank 21; the three-phase separator 17 is used to separate the gas, water and sludge in the sludge-water mixture flowing into the sedimentation zone 16 through the fourth hole 15, and to return the separated gas to the aerobic zone 11 through the vent 18, to input the separated water into the inclined tube sedimentation tank 19, and to deposit the separated sludge into the sludge collection tank 21; the water collection tank 20 is used to collect the supernatant after sedimentation, and then the water collection tank 20 passes through the fifth hole 27 and the sixth hole 28 to discharge the supernatant into the coagulation zone 29 of the coagulation filtration unit D.

[0048] It should be further explained that a motor is installed inside the motor well 23; the motor is used to drive the screw sludge discharge device 22 to rotate, and then push the sludge into the sludge collection well 24.

[0049] It should be further explained that a sludge lifting pump 25 and a sludge discharge pipe 26 are installed in the sludge collection well 24; the sludge lifting pump 25 is used to lift the sludge to the anaerobic zone 7; the sludge discharge pipe 26 is used to discharge the remaining sludge; one end of the sludge discharge pipe 26 is connected to the sludge collection well 24, and the other end is connected to the sludge treatment facility.

[0050] It should be noted that the coagulation and filtration unit D includes a coagulation zone 29, a flocculation zone 31, and a filtration zone 33, wherein:

[0051] The coagulation zone 29 is connected to the flocculation zone 31 through the seventh hole 30; the flocculation zone 31 is connected to the filtration zone 33 through the eighth hole 32; the filtration zone 33 is equipped with filter media 34 and a sludge discharge trough 39; the filtration zone 33 is connected to the disinfection water storage tank 36 of the disinfection effluent unit E through the ninth hole 35, and the clean water filtered by the filter media 34 flows into the disinfection water storage tank 36 through the ninth hole 35; the sludge discharge trough 39 is used to collect and discharge the sludge water from the backwashing filter media 34.

[0052] It should be noted that the disinfection water outlet unit E includes a disinfection water storage tank 36, a clean water outlet pipe 37, and a backwashing device 38. The backwashing device 38 is located inside the disinfection water storage tank 36 and is used to pump out the clean water in the disinfection water storage tank 36 and backwash the filter media 34. The clean water outlet pipe 37 is located at the end of the disinfection water storage tank 36. One end of the clean water outlet pipe 37 is connected to the disinfection water storage tank 36, and the other end is connected to the water metering device or the utilization device.

[0053] It should be noted that the wastewater treatment integrated device based on the AAO principle of this utility model has a compact structure. It integrates the biological reaction process, sedimentation process, filtration process and disinfection process of traditional wastewater treatment into a single tank unit structure, and realizes continuous influent and effluent. It can be used in surface wastewater treatment plants, underground wastewater treatment plants, and integrated wastewater treatment facilities. It has significant effects of low operating energy consumption, small footprint, low investment and high efficiency.

[0054] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the present invention is in a state with fewer features than all of the disclosed individual embodiments. Therefore, the appended claims are hereby clearly incorporated into the detailed description, wherein each claim stands alone as a preferred embodiment of the present invention.

[0055] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0056] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0057] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A wastewater treatment integrated device based on the AAO principle, characterized in that: It comprises, sequentially connected along the water flow direction, a sludge and grit removal unit (A), an AAO biological treatment unit (B), a sedimentation unit (C), a coagulation and filtration unit (D), and a disinfected effluent unit (E), wherein: The slag removal and grit removal unit (A) is used to remove scum and sand particles from the wastewater and introduce the wastewater into the AAO biological treatment unit (B); The AAO biological treatment unit (B) is used to remove carbon, nitrogen, and phosphorus pollutants from the wastewater after it has been treated by the sludge removal and grit removal unit (A) using activated sludge. The sedimentation unit (C) is used to separate the aerated cement from the mud-water mixture after treatment by the AAO biological treatment unit (B); The coagulation and filtration unit (D) is used to further remove suspended solids and dissolved contaminants from the supernatant after sedimentation and separation by the precipitation unit (C); The disinfection effluent unit (E) is used to disinfect and sterilize the effluent filtered by the coagulation filtration unit (D), and then store and discharge it.

2. The integrated wastewater treatment device based on the AAO principle according to claim 1, characterized in that: The slag removal and sand settling unit (A) includes an inlet culvert (1), a screen sand settling channel (2), a fine screen (3), a sand discharge hopper (4), a sand storage tank (5), and a first orifice (6), wherein: One end of the inlet pipe (1) is connected to the sewage pipe network, and the other end is connected to the grit chamber (2), and is used to introduce sewage into the grit chamber (2); the grit chamber (2) is equipped with the fine screen (3) and the sand discharge hopper (4); the grit chamber (2) is connected to the anaerobic zone (7) of the AAO biological treatment unit (B) through the first hole (6) located at the outlet; the sand storage tank (5) is located below the sand discharge hopper (4).

3. The integrated wastewater treatment device based on the AAO principle according to claim 2, characterized in that: The AAO biological treatment unit (B) comprises the anaerobic zone (7), the anoxic zone (9), and the aerobic zone (11), wherein: The anaerobic zone (7) is connected to the anoxic zone (9) through the second hole (8); the anoxic zone (9) is connected to the aerobic zone (11) through the third hole (10); a through-wall reflux pump (13) is provided at the wall where the aerobic zone (11) and the anoxic zone (9) share a wall; the through-wall reflux pump (13) is used to pump the mud-water mixture in the aerobic zone (11) to the anoxic zone (9); a fourth hole (15) and a vent (18) are provided at the wall where the aerobic zone (11) and the sedimentation zone (16) of the sedimentation unit (C) share a wall; the vent (18) is located above the fourth hole (15).

4. The integrated wastewater treatment device based on the AAO principle according to claim 3, characterized in that: Submersible mixers (14) are respectively installed inside the anaerobic zone (7), the anoxic zone (9) and the aerobic zone (11).

5. The integrated wastewater treatment device based on the AAO principle according to claim 4, characterized in that: An aeration device (12) is installed inside the aerobic zone (11).

6. The integrated wastewater treatment device based on the AAO principle according to claim 5, characterized in that: The sedimentation unit (C) includes the sedimentation zone (16), the motor well (23), and the sludge collection well (24), wherein: The sedimentation zone (16) is provided with a sludge collection trough (21), a screw sludge discharge device (22), a three-phase separator (17), an inclined tube sedimentator (19), and a water collection trough (20) arranged sequentially from bottom to top. One end of the sedimentation zone (16) is connected to the sludge collection well (24) through the sludge collection trough (21), and the other end is connected to the motor well (23) through the screw sludge discharge device (22). The screw sludge discharge device (22) is installed inside the sludge collection tank (21); the three-phase separator (17) is used to separate the gas, water and mud in the mud-water mixture flowing into the sedimentation zone (16) through the fourth hole (15), and to return the separated gas to the aerobic zone (11) through the vent (18), to input the separated water into the inclined tube sedimentation tank (19), and to deposit the separated sludge into the sludge collection tank (21); the water collection tank (20) is used to collect the supernatant after sedimentation, and then the water collection tank (20) passes through the fifth hole (27) and the sixth hole (28) to discharge the supernatant into the coagulation zone (29) of the coagulation filtration unit (D).

7. The integrated wastewater treatment device based on the AAO principle according to claim 6, characterized in that: The motor well (23) is equipped with a motor; the motor is used to drive the screw sludge discharge device (22) to rotate, and then push the sludge into the sludge collection well (24).

8. The integrated wastewater treatment device based on the AAO principle according to claim 7, characterized in that: The sludge collection well (24) is equipped with a sludge lifting pump (25) and a sludge discharge pipe (26); the sludge lifting pump (25) is used to lift the sludge to the anaerobic zone (7); the sludge discharge pipe (26) is used to discharge the remaining sludge; one end of the sludge discharge pipe (26) is connected to the sludge collection well (24), and the other end is connected to the sludge treatment facility.

9. The integrated wastewater treatment device based on the AAO principle according to claim 8, characterized in that: The coagulation and filtration unit (D) includes the coagulation zone (29), the flocculation zone (31), and the filtration zone (33), wherein: The coagulation zone (29) is connected to the flocculation zone (31) through the seventh hole (30); the flocculation zone (31) is connected to the filtration zone (33) through the eighth hole (32); the filtration zone (33) is provided with filter media (34) and a sludge discharge trough (39); the filtration zone (33) is connected to the disinfection water storage tank (36) of the disinfection water outlet unit (E) through the ninth hole (35); the sludge discharge trough (39) is used to collect and discharge the sludge water from backwashing the filter media (34).

10. The integrated wastewater treatment device based on the AAO principle according to claim 9, characterized in that: The disinfection water outlet unit (E) includes the disinfection water storage tank (36), the clean water outlet pipe (37), and the backwashing device (38); the backwashing device (38) is installed inside the disinfection water storage tank (36) and is used to pump out the clean water in the disinfection water storage tank (36) and backwash the filter media (34). The clean water outlet pipe (37) is located at the end of the disinfection water storage tank (36); one end of the clean water outlet pipe (37) is connected to the disinfection water storage tank (36), and the other end is connected to the water metering device or the utilization device.

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