Kitchen wastewater combined treatment equipment
Patent Information
- Application Number
- CN202521991367.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-16
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-09-16
AI Technical Summary
因其高浓度、含油脂等特性，远远超过下水道排放标准，对市政污水处理厂造成不良影响，因此提出了一种餐厨污水就地处理装置
该餐厨污水组合处理设备，对餐厨废水经油水分离器或餐厨垃圾处理器产生的污水具有良好的处理效果，并且对污水中的污染物去除主要进行的是生化法，有效去除水中油、氨氮、CODcr、悬浮物等污染物，达标排放到下水道，避免餐厨废水污染环境，污水经过破乳絮凝除油后，有机负荷大为减少，节省后续生化时间，生化池使用球形悬浮填料使得微生物生长形成生物膜系统，在排水时不易流失，提高装置处理餐厨污水的长期稳定性，生化膜脱落少，随着出水排到下水道，无设置二沉池，节省了投资，减少生化污泥的处理量。
Smart Images
Figure CN224869941U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of kitchen wastewater treatment technology, specifically a combined kitchen wastewater treatment device. Background Technology
[0002] Kitchen wastewater has a high oil content, high concentrations of organic matter and ammonia nitrogen, and also high concentrations of pollutants such as total nitrogen, total phosphorus, and suspended solids. Its quality and quantity fluctuate greatly, making treatment difficult. Due to the large volume of kitchen wastewater, it can only be treated on-site. Because of its high pollution level, it cannot be directly discharged into the sewer system for centralized treatment. Generally, kitchen waste is pre-treated by separating it from other food waste before being discharged into the sewer system and then into municipal wastewater treatment plants. However, due to its high concentration and oil content, it far exceeds sewer discharge standards, adversely affecting municipal wastewater treatment plants. Therefore, an on-site kitchen wastewater treatment device is proposed. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a combined treatment device for kitchen wastewater, which solves the problems mentioned in the background section.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a combined treatment device for kitchen wastewater, comprising a collection tank, a reaction tank, a primary sedimentation tank, and a biological treatment tank. An air duct is fixedly connected inside the biological treatment tank, and several microporous aeration heads are fixedly connected to the outside of the air duct. A blower is fixedly connected to one end of the air duct. Biological packing material is installed inside the biological treatment tank. A lift pump and a submersible mixer are fixedly connected inside the collection tank. A demulsifier dosing port is fixedly connected to the top of the inner wall of the collection tank. A reaction tank is installed on one side of the collection tank, and a primary sedimentation tank is fixedly connected to one side of the reaction tank. A stirrer is fixedly connected inside the reaction tank, and a PAM dosing port is fixedly connected to the top of the reaction tank. A lift pump is fixedly connected to the inner wall of the collection tank, and a fifth pipe is fixedly connected to one end of the lift pump. A PAC dosing port is fixedly connected to the fifth pipe.
[0005] Preferably, a sludge pump is fixedly connected to the bottom of the internal cavity of the primary sedimentation tank body. The primary sedimentation tank body includes a primary sedimentation tank central pipe, a primary sedimentation tank outlet pipe, and a primary sedimentation tank sludge discharge pipe. The primary sedimentation tank central pipe, the primary sedimentation tank outlet pipe, and the primary sedimentation tank sludge discharge pipe are all installed inside the primary sedimentation tank body. One end of the sludge pump is fixedly connected to the primary sedimentation tank sludge discharge pipe.
[0006] Preferably, an equipment room is fixedly connected between the biological treatment tank body and the collection tank. A dosing device is fixedly connected inside the equipment room. The dosing device includes a first dosing device, a second dosing device, and a third dosing device. The first dosing device is connected to the demulsifier dosing port through a second pipe. The second dosing device is connected to the PAC dosing port through a third pipe. The third dosing device is connected to the PAM dosing port through a fourth pipe. A first metering pump is fixedly connected to the second pipe. A second metering pump is fixedly connected to the third pipe. A third metering pump is fixedly connected to the fourth pipe. An eighth pipe is installed on the sludge dewatering machine. A fourth metering pump is fixedly connected to one end of the eighth pipe. A blower is fixedly connected inside the equipment room. An air main is fixedly connected to the air outlet of the blower. One end of the air main extends into the biological treatment tank body and is connected to an air duct. A first pipe for water inlet is fixedly connected to one side of the collection tank.
[0007] Preferably, the biological packing material inside the biochemical tank is a spherical suspended biological packing material.
[0008] Preferably, the outlet of the reaction tank is connected to the inlet of the primary sedimentation tank via a sixth pipe, and the primary sedimentation tank is connected to the inlet of the biochemical tank via a seventh pipe through a primary sedimentation tank outlet pipe.
[0009] Preferably, the sludge dewatering machine is connected to the sludge pump through the sludge discharge pipe of the primary sedimentation tank, the other end of the fourth metering pump extends into the interior of the fourth dosing device, and a main effluent pipe is fixedly connected inside the biological treatment tank.
[0010] This utility model provides a combined treatment device for kitchen wastewater, which has the following beneficial effects: This combined kitchen wastewater treatment equipment effectively treats wastewater generated from kitchen wastewater processed by oil-water separators or kitchen waste processors. The primary method for removing pollutants is biological treatment, effectively removing oil, ammonia nitrogen, CODcr, suspended solids, and other pollutants from the water, ensuring it meets discharge standards before being discharged into the sewer system. This prevents kitchen wastewater from polluting the environment. After demulsification, flocculation, and oil removal, the organic load is significantly reduced, saving subsequent biological treatment time. The biological treatment tank uses spherical suspended packing material to promote microbial growth and form a biofilm system that is less prone to loss during drainage, improving the long-term stability of the equipment in treating kitchen wastewater. Minimal biofilm shedding occurs as it is discharged into the sewer system, eliminating the need for a secondary sedimentation tank, saving investment and reducing the amount of biological sludge required. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the water collection tank, reaction tank and primary sedimentation tank of this utility model; Figure 4 This is a schematic diagram of the internal structure of the equipment room of this utility model; Figure 5 This is a schematic diagram of the internal structure of the biochemical pool body of this utility model; Figure 6 This is a process diagram of the present utility model.
[0012] In the diagram: 1. Collection tank; 2. Reaction tank; 3. Primary sedimentation tank body; 301. Central pipe of primary sedimentation tank; 302. Outlet pipe of primary sedimentation tank; 303. Sludge discharge pipe of primary sedimentation tank; 4. Biological tank body; 401. Biological packing material; 5. Lifting pump; 6. Submersible mixer; 7. Agitator; 8. Blower; 801. Air duct; 9. Microporous aeration head; 10. First dosing device; 11. Second dosing device; 12. Third dosing device; 13. First metering pump; 14. Second metering pump. 15. Pump; 16. Third metering pump; 17. Demulsifier dosing port; 18. PAC dosing port; 19. PAM dosing port; 20. Main outlet pipe; 21. Equipment room; 22. Sludge dewatering machine; 23. First pipeline; 24. Main air pipe; 25. Second pipeline; 26. Third pipeline; 27. Fourth pipeline; 28. Fifth pipeline; 29. Seventh pipeline; 30. Fourth dosing device; 31. Sludge pump; 32. Eighth pipeline; 33. Fourth metering pump. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0014] Please see Figures 1 to 6This utility model provides a technical solution: a kitchen wastewater treatment device, comprising a collection tank 1, a reaction tank 2, a primary sedimentation tank 3, and a biological treatment tank 4. An air duct 801 is fixedly connected inside the biological treatment tank 4, and several microporous aeration heads 9 are fixedly connected to the outside of the air duct 801. A blower 8 is fixedly connected to one end of the air duct 801. Biological packing material 401 is installed inside the biological treatment tank 4. A lift pump 5 and a submersible mixer 6 are fixedly connected inside the collection tank 1. A demulsifier dosing port 16 is fixedly connected to the top of the inner wall of the collection tank 1. The reaction tank 2 is installed on one side of the collection tank 1, and the primary sedimentation tank 3 is fixedly connected to one side of the reaction tank 2. The reaction tank 2 is fixedly connected to a stirrer 7 and a PAM dosing port 18. A lift pump 5 is fixedly connected to the inner wall of the collection tank 1. A fifth pipe 27 is fixedly connected to one end of the lift pump 5. A PAC dosing port 17 is fixedly connected to the fifth pipe 27. A fourth dosing device 30, a fourth metering pump 33, a third dosing device 12, a third metering pump 15, a first metering pump 13, a first dosing device 10, a fourth pipe 26, a third pipe 25, a second pipe 24, a sludge dewatering machine 21, a blower 8, an air main duct 23, an eighth pipe 32, a seventh pipe 29, and a primary sedimentation tank sludge discharge pipe 303 are all installed inside the equipment room 20. A first pipe 22 is fixedly connected to one side of the collection tank 1. One end of the first pipe 22 extends into the collection tank 1.
[0015] The primary sedimentation tank body 3 is equipped with a primary sedimentation tank central pipe 301, a primary sedimentation tank outlet pipe 302, a primary sedimentation tank sludge discharge pipe 303, and a sludge pump 31 installed at the bottom of the primary sedimentation tank body 3. The sludge dewatering machine 21 is connected to the sludge pump 31 through the sludge discharge pipe 303 of the primary sedimentation tank to dewater the sludge settled in the primary sedimentation tank body 3. The fourth dosing device 30 adds cationic polyacrylamide to the dilute sludge of the sludge dewatering machine 21 through the fourth metering pump 33 and the eighth pipe 32 to coagulate the sludge and assist the sludge dewatering machine 21 in achieving dewatering. The biological tank body 4 is equipped with an air pipe 801 and several microporous aeration heads 9 connected to the air pipe 801. The main air pipe 23 connected to the outside of the biological tank body 4 is connected to a blower 8. The biological packing material 401 installed inside the biological tank body 4 is a spherical suspended biological packing material. The packing material does not need to be fixedly installed. The specifications are 100-150mm in diameter. The biological packing material 401 occupies 20%-30% of the volume of the biological tank body 4. First dosing device 10, second dosing device 11, and third dosing device 12; the first dosing device 10 is connected to the demulsifier dosing port 16 via a second pipe 24, the second dosing device 11 is connected to the PAC dosing port 17 via a third pipe 25, the third dosing device 12 is connected to the PAM dosing port 18 via a fourth pipe 26, and a first metering pump 13 is connected to the second pipe 24 and a second metering pump 14 is connected to the third pipe 25; a third metering pump 15 is connected to the fourth pipe 26; a fourth dosing device 30 is connected via an eighth pipe 32, and a fourth metering pump 33 is connected to the eighth pipe 32. The effluent from reaction tank 2 is connected to primary sedimentation tank body 3 via the sixth pipe 28, serving as the influent to primary sedimentation tank body 3.
[0016] The primary sedimentation tank outlet pipe 302 of the primary sedimentation tank body 3 is connected to the inner cavity of the biological treatment tank body 4 through the seventh pipe 29.
[0017] The submersible mixer 6 in the wastewater collection tank 1 operates intermittently. When the wastewater in the collection tank 1 is full, the submersible mixer 6 starts to stir, which stirs up the sediment, grease and demulsifier in the collection tank 1. The demulsifier separates the emulsified oil in the wastewater into free grease, which flows through the sixth pipe 28 via the lift pump 5 and enters the reaction tank 2 to react with the coagulant PAC and the coagulant aid PAM to produce flocculent flocs. The effluent from reaction tank 2 enters the primary sedimentation tank body 3 through the sixth pipe 28 for solid-liquid separation. The primary sedimentation tank body 3 operates intermittently. After the mixed sewage from collection tank 1 enters the primary sedimentation tank body 3, the primary sedimentation tank body 3 starts to work to settle and separate oil from the sewage. Heavier impurities settle to the bottom of the primary sedimentation tank. The working time of the primary sedimentation tank body 3 needs to be set according to the water quality. The effluent from the primary sedimentation tank 3 flows into the biological treatment tank 4 through the primary sedimentation tank effluent pipe 302 and the seventh pipe 29. During operation, the biological treatment tank 4 aerates the sewage. Dissolved organic pollutants in the sewage are adsorbed and oxidized on the biological packing material and removed. Microorganisms attach and grow on the biological packing material 401. When the sewage is discharged, the loss of microorganisms can be avoided. There is no need to stop aeration to allow the sewage to settle during drainage. The sludge is discharged into the sewer along with the effluent.
[0018] In summary, this combined kitchen wastewater treatment equipment operates intermittently during demulsification and flocculation reactions. Kitchen wastewater is collected in the collection tank 1 at 70% water level. First, demulsifier is added to the collection tank 1 via the first dosing device 10, the second pipeline 24, and the demulsifier dosing port 16. Then, the submersible mixer 6 inside the collection tank 1 is started to agitate and demulsify the wastewater and the demulsifier, separating free oil. After 10-15 minutes, the addition of demulsifier and the submersible mixer 6 are stopped, and the lift pump 5 is started to lift the wastewater from the collection tank 1 to the reaction tank. Inside reaction tank 2, when the water level in collection tank 1 drops to 30%, the booster pump 5 stops operating. Then, the second metering pump 14 and the third metering pump 15 add PAC and PAM to reaction tank 2 respectively for flocculation. The mixture is stirred by agitator 7 for 10-20 minutes until the flocculation reaction is complete, removing grease and most suspended solids. The wastewater inside reaction tank 2 enters the primary sedimentation tank body 3 through the sixth pipe 28. The wastewater stays in the primary sedimentation tank body 3 for 20 minutes, where grease and most suspended solids are settled and removed. For solid waste, the primary sedimentation tank 3 operates intermittently. After the mixed wastewater from the collection tank 1 enters the primary sedimentation tank 3, it begins to work, separating grease and heavier impurities from the wastewater. The working time of the primary sedimentation tank 3 needs to be set according to the water quality. The sludge dewatering machine 21 is connected to the sludge pump 31 through the primary sedimentation tank discharge pipe 303. The sludge settled in the primary sedimentation tank 3 is pumped into the sludge dewatering machine 21 through the sludge pump 31 and the primary sedimentation tank discharge pipe 303 for dewatering. The fourth dosing device 30, through the fourth metering pump 33 and the eighth pipe 32, delivers... Cationic polyacrylamide is added to the dilute sludge inside the sludge dewatering machine 21 to coagulate the sludge and assist the sludge dewatering machine 21 in achieving dewatering. Then, the sewage flows from the primary sedimentation tank body 3 through the primary sedimentation tank outlet pipe 302 and the seventh pipe 29 into the biological treatment tank body 4. During the biological treatment process, the blower 8 works continuously, and the gas is injected into the sewage through the blower 8, the air main pipe 23, the air pipe 801 and the microporous aeration head 9. The effluent is discharged into the sewer from the main outlet pipe 19. The hydraulic retention time of the sewage inside the biological treatment tank body 4 is about 8 to 10 hours.
[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A combined treatment device for kitchen wastewater, characterized in that: It comprises a water collection tank (1), a reaction tank (2), a primary sedimentation tank (3), and a biological treatment tank (4). An air duct (801) is fixedly connected inside the biological treatment tank (4). Several microporous aeration heads (9) are fixedly connected to the outside of the air duct (801). A blower (8) is fixedly connected to one end of the air duct (801). Biological packing material (401) is installed inside the biological treatment tank (4). A lift pump (5) is fixedly connected inside the water collection tank (1). A submersible mixer (6) is fixedly connected inside the water collection tank (1). A demulsifier dosing port (16) is fixedly connected to the top of the inner wall of the pool (1). A reaction pool (2) is installed on one side of the water collection pool (1). A primary sedimentation tank body (3) is fixedly connected to one side of the reaction pool (2). A stirrer (7) is fixedly connected inside the reaction pool (2). A PAM dosing port (18) is fixedly connected to the top of the reaction pool (2). A lift pump (5) is fixedly connected to the inner wall of the water collection pool (1). A fifth pipe (27) is fixedly connected to one end of the lift pump (5). A PAC dosing port (17) is fixedly connected to the fifth pipe (27).
2. The combined treatment equipment for kitchen wastewater according to claim 1, characterized in that: A sludge pump (31) is fixedly connected to the bottom of the inner cavity of the primary sedimentation tank body (3). The primary sedimentation tank body (3) includes a primary sedimentation tank central pipe (301), a primary sedimentation tank outlet pipe (302), and a primary sedimentation tank sludge discharge pipe (303). The primary sedimentation tank central pipe (301), the primary sedimentation tank outlet pipe (302), and the primary sedimentation tank sludge discharge pipe (303) are all installed inside the primary sedimentation tank body (3). One end of the sludge pump (31) is fixedly connected to the primary sedimentation tank sludge discharge pipe (303).
3. The combined treatment equipment for kitchen wastewater according to claim 1, characterized in that: A device room (20) is fixedly connected between the biological treatment tank body (4) and the collection tank (1). A dosing device is fixedly connected inside the device room (20). The dosing device consists of a first dosing device (10), a second dosing device (11), and a third dosing device (12). The first dosing device (10) is connected to the demulsifier dosing port (16) through a second pipe (24). The second dosing device (11) is connected to the PAC dosing port (17) through a third pipe (25). The third dosing device (12) is connected to the PAM dosing port (18) through a fourth pipe (26). A first metering pump (13) is fixedly connected to the second pipe (24). A second metering pump (14) is fixedly connected to the third pipe (25). A third metering pump (15) is fixedly connected to the fourth pipe (26). A sludge dewatering machine (21) is installed inside the device room (20). The sludge dewatering machine (21) is equipped with an eighth pipe (32), one end of which is fixedly connected to a fourth metering pump (33). The equipment room (20) is fixedly connected to a blower (8), the air outlet of the blower (8) is fixedly connected to an air main pipe (23), one end of the air main pipe (23) extends into the body of the biochemical tank (4) and is connected to an air pipe (801). The water collection tank (1) is fixedly connected to a first pipe (22) for water intake on one side.
4. The combined treatment equipment for kitchen wastewater according to claim 1, characterized in that: The biological packing material (401) inside the biochemical pool body (4) is a spherical suspended biological packing material.
5. The combined treatment equipment for kitchen wastewater according to claim 1, characterized in that: The outlet of the reaction tank (2) is connected to the inlet of the primary sedimentation tank body (3) through the sixth pipe (28), and the primary sedimentation tank body (3) is connected to the inlet of the biochemical tank body (4) through the seventh pipe (29) via the primary sedimentation tank outlet pipe (302).
6. The combined treatment equipment for kitchen wastewater according to claim 3, characterized in that: The sludge dewatering machine (21) is connected to the sludge pump (31) through the sludge discharge pipe (303) of the primary sedimentation tank. The other end of the fourth metering pump (33) extends into the fourth dosing device (30). The main outlet pipe (19) is fixedly connected inside the biochemical tank body (4).