Biochemical wastewater treatment system

Abstract

The utility model provides a biochemical wastewater treatment system which is characterized in that the output end of a raw water collecting tank is connected with the input end of a hydrolytic acidification tank through a raw water lifting pump, the output end of the hydrolytic acidification tank is connected with the input end of a total biochemical reaction tank, and the output end of the total biochemical reaction tank is connected with the input end of an MBR reaction tank through a biochemical reflux pump; the output end of the MBR reaction tank is connected with the input end of the sterilization and disinfection water tank through an MBR suction pump, the output end of the sterilization and disinfection water tank is connected with an external drainage pipeline through a drainage pump, and the bottoms of the hydrolytic acidification tank, the total biochemical reaction tank, the MBR reaction tank and the sterilization and disinfection water tank are connected with an aeration device. The aeration device is used for providing compressed air for the hydrolytic acidification tank, the total biochemical reaction tank, the MBR reaction tank and the sterilization and disinfection water tank for reaction, the hydrolytic acidification tank and the total biochemical reaction tank are arranged to replace the existing AO process, and the MBR reaction tank is arranged to improve the treatment efficiency; the mechanical grating is arranged, so that the effect of pre-filtering large-diameter impurities is achieved, and the treatment efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically, to a biochemical wastewater treatment system. Background Art

[0002] The biochemical treatment system for sewage treatment is a technology that effectively removes organic matter and nitrogen and phosphorus pollutants from urban and industrial sewage.

[0003] The closest technology to the existing one is, publication number: CN107399879A, a system and process for deep treatment of artificial board wastewater, which discloses that the system includes a coagulation reaction tank, an inclined plate sedimentation tank, an ozone oxidation device, an aerated biological filter, a filtration device and a decolorization tank connected in sequence; the process includes coagulation, sedimentation, ozone oxidation, aeration, filtration and decolorization steps.

[0004] The existing sewage treatment biochemical system uses AO process for sewage treatment, which is still unable to treat sewage efficiently. In addition, the inclined plate sedimentation tank is used, and the effluent efficiency is low, which further reduces the sewage treatment efficiency.

[0005] In view of this, the utility model proposes a biochemical wastewater treatment system with high efficiency and low cost. Utility Model Content

[0006] The purpose of the utility model is to provide a biochemical wastewater treatment system with low energy consumption and low cost.

[0007] A biochemical wastewater treatment system comprises a raw water collection tank 1, a hydrolysis acidification tank 2, a total biochemical reaction tank 3, an MBR reaction tank 4, and a sterilization and disinfection water tank 5, wherein the output end of the raw water collection tank 1 is connected to the input end of the hydrolysis acidification tank 2 through a raw water lifting pump 6, the output end of the hydrolysis acidification tank 2 is connected to the input end of the total biochemical reaction tank 3, the output end of the total biochemical reaction tank 3 is connected to the input end of the MBR reaction tank 4 through a biochemical reflux pump 7, the output end of the MBR reaction tank 4 is connected to the input end of the sterilization and disinfection water tank 5 through an MBR suction pump 8, and the output end of the sterilization and disinfection water tank 5 is connected to an external drainage pipe through a discharge water pump 19, and an aeration device 9 is connected to the bottom of the hydrolysis acidification tank 2, the total biochemical reaction tank 3, the MBR reaction tank 4, and the sterilization and disinfection water tank 5, and the aeration device 9 is used to provide compressed air for the hydrolysis acidification tank 2, the total biochemical reaction tank 3, the MBR reaction tank 4, and the sterilization and disinfection water tank 5 to react.

[0008] Furthermore, a first butterfly valve 10, a first flow meter 11, and a first check valve 12 are sequentially provided between the raw water lift pump 6 and the input end of the hydrolysis acidification tank 2. The first butterfly valve 10 is used to control the opening and closing of the pipeline, the first flow meter 11 is used to monitor the output flow of the raw water collection tank 1, and the first check valve 12 is used to prevent the output material of the raw water collection tank 1 from flowing back.

[0009] Furthermore, a mechanical screen 13 is provided in the raw water collection tank 1 away from the raw water lifting pump 6 , and the mechanical screen 13 is used to pre-filter large-diameter impurities.

[0010] Furthermore, the raw water collection tank 1 is provided with a sedimentation tank 14 near the mechanical grille 13, and the sedimentation tank 14 plays a role of pre-sedimentation.

[0011] Furthermore, a biochemical water distribution tank is provided between the raw water collection tank 1 and the hydrolysis acidification tank 2 , and the output end of the raw water collection tank 1 is connected to the input end of the biochemical water distribution tank through the raw water lifting pump 6 , and the output end of the biochemical water distribution tank is connected to the input end of the total biochemical reaction tank 3 .

[0012] Furthermore, the total biochemical reaction tank 3 includes a first biochemical reaction tank 31 and a second biochemical reaction tank 32, wherein the first biochemical reaction tank 31 and the second biochemical reaction tank 32 are both anaerobic aerobic tanks, the first biochemical reaction tank 31 is used for primary treatment, and the second biochemical reaction tank 32 is used for secondary treatment, the output end of the hydrolysis acidification tank 2 is connected to the input end of the first biochemical reaction tank 31, the output end of the first biochemical reaction tank 31 is connected to the input end of the second biochemical reaction tank 32, and the output end of the second biochemical reaction tank 32 is connected to the input end of the MBR reaction tank 4.

[0013] Furthermore, the first biochemical reaction tank 31 and the second biochemical reaction tank 32 are backup for each other, and the capacity of the first biochemical reaction tank 31 is smaller than that of the second biochemical reaction tank 32 .

[0014] Furthermore, the ends of the raw water lifting pump 6 and the biochemical reflux pump 7 are both provided with stirring heads 15 for mixing and stirring the treated materials.

[0015] Furthermore, the hydrolysis acidification tank 2, the total biochemical reaction tank 3, and the MBR reaction tank 4 are also connected to a biochemical sludge collection tank 16, and the sludge output ends of the hydrolysis acidification tank 2, the total biochemical reaction tank 3, and the MBR reaction tank 4 are connected to the input end of the biochemical sludge collection tank 16 through a sludge conveying pipeline 20, and the sludge output end of the biochemical sludge collection tank 16 is connected to the hydrolysis acidification tank 2 and the total biochemical reaction tank 3 through a biochemical sludge discharge pump 17.

[0016] Furthermore, the raw water collection tank 1, the hydrolysis acidification tank 2, the sterilization and disinfection water tank 5, and the biochemical sludge collection tank 16 are also provided with a maintenance drain valve 18, and the maintenance drain valve 18 is used for draining water during maintenance.

[0017] Beneficial effects of the utility model: The utility model proposes a biochemical wastewater treatment system, including a raw water collection tank 1, a hydrolysis acidification tank 2, a total biochemical reaction tank 3, an MBR reaction tank 4, and a sterilization and disinfection water tank 5. The output end of the raw water collection tank 1 is connected to the input end of the hydrolysis acidification tank 2 through a raw water lifting pump 6, the output end of the hydrolysis acidification tank 2 is connected to the input end of the total biochemical reaction tank 3, the output end of the total biochemical reaction tank 3 is connected to the input end of the MBR reaction tank 4 through a biochemical reflux pump 7, the output end of the MBR reaction tank 4 is connected to the input end of the sterilization and disinfection water tank 5 through an MBR suction pump 8, and the sterilization and disinfection The output end of the water pool 5 is connected to the external drainage pipe through the discharge water pump 19. The bottom of the hydrolysis acidification tank 2, the total biochemical reaction tank 3, the MBR reaction tank 4, and the sterilization and disinfection water pool 5 is connected with an aeration device 9. The aeration device 9 is used to provide compressed air for the hydrolysis acidification tank 2, the total biochemical reaction tank 3, the MBR reaction tank 4, and the sterilization and disinfection water pool 5 for reaction. The hydrolysis acidification tank 2 and the total biochemical reaction tank 3 are arranged to replace the existing AO process, and the MBR reaction tank 4 is arranged to improve the treatment efficiency; a mechanical grille 13 is provided to pre-filter large-diameter impurities, thereby further improving the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a biochemical wastewater treatment system of the present application.

[0019] Main component symbols

[0020] Raw water collection tank 1, hydrolysis acidification tank 2, total biochemical reaction tank 3, first biochemical reaction tank 31, second biochemical reaction tank 32, MBR reaction tank 4, sterilization and disinfection water tank 5, raw water lifting pump 6, biochemical reflux pump 7, MBR suction pump 8, aeration device 9, first butterfly valve 10, first flow meter 11, first check valve 12, mechanical grille 13, sedimentation tank 14, stirring head 15, biochemical sludge collection tank 16, biochemical sludge discharge pump 17, maintenance drain valve 18, discharge water pump 19, sludge conveying pipeline 20.

[0021] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0022] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0023] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including within a single system or component).

[0024] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0025] like Figure 1 Shown is a schematic structural diagram of a biochemical wastewater treatment system of the present application.

[0026] A biochemical wastewater treatment system comprises a raw water collection tank 1, a hydrolysis acidification tank 2, a total biochemical reaction tank 3, an MBR reaction tank 4, and a sterilization and disinfection water tank 5, wherein the output end of the raw water collection tank 1 is connected to the input end of the hydrolysis acidification tank 2 through a raw water lifting pump 6, the output end of the hydrolysis acidification tank 2 is connected to the input end of the total biochemical reaction tank 3, the output end of the total biochemical reaction tank 3 is connected to the input end of the MBR reaction tank 4 through a biochemical reflux pump 7, the output end of the MBR reaction tank 4 is connected to the input end of the sterilization and disinfection water tank 5 through an MBR suction pump 8, and the output end of the sterilization and disinfection water tank 5 is connected to an external drainage pipe through a discharge water pump 19, and an aeration device 9 is connected to the bottom of the hydrolysis acidification tank 2, the total biochemical reaction tank 3, the MBR reaction tank 4, and the sterilization and disinfection water tank 5, and the aeration device 9 is used to provide compressed air for the hydrolysis acidification tank 2, the total biochemical reaction tank 3, the MBR reaction tank 4, and the sterilization and disinfection water tank 5 to react.

[0027] A first butterfly valve 10, a first flow meter 11, and a first check valve 12 are provided in sequence between the raw water lift pump 6 and the input end of the hydrolysis acidification tank 2. The first butterfly valve 10 is used to control the opening and closing of the pipeline, the first flow meter 11 is used to monitor the output flow of the raw water collection tank 1, and the first check valve 12 is used to prevent the output material of the raw water collection tank 1 from flowing back.

[0028] A mechanical grille 13 is also provided in the raw water collection tank 1 away from the raw water lifting pump 6 , and the mechanical grille 13 is used to pre-filter large-diameter impurities.

[0029] The raw water collection tank 1 is provided with a sedimentation tank 14 near the mechanical grille 13, and the sedimentation tank 14 plays a role of pre-sedimentation.

[0030] A biochemical water distribution tank is also provided between the raw water collection tank 1 and the hydrolysis acidification tank 2 . The output end of the raw water collection tank 1 is connected to the input end of the biochemical water distribution tank through a raw water lifting pump 6 , and the output end of the biochemical water distribution tank is connected to the input end of the total biochemical reaction tank 3 .

[0031] The total biochemical reaction tank 3 includes a first biochemical reaction tank 31 and a second biochemical reaction tank 32. The first biochemical reaction tank 31 and the second biochemical reaction tank 32 are both anaerobic aerobic tanks. The first biochemical reaction tank 31 is used for primary treatment, and the second biochemical reaction tank 32 is used for secondary treatment. The output end of the hydrolysis acidification tank 2 is connected to the input end of the first biochemical reaction tank 31, the output end of the first biochemical reaction tank 31 is connected to the input end of the second biochemical reaction tank 32, and the output end of the second biochemical reaction tank 32 is connected to the input end of the MBR reaction tank 4.

[0032] The first biochemical reaction tank 31 and the second biochemical reaction tank 32 are backup tanks for each other, and the capacity of the first biochemical reaction tank 31 is smaller than that of the second biochemical reaction tank 32 .

[0033] The ends of the raw water lifting pump 6 and the biochemical reflux pump 7 are both provided with stirring heads 15 for mixing and stirring the treated materials.

[0034] The hydrolysis acidification tank 2, the total biochemical reaction tank 3, and the MBR reaction tank 4 are also connected to a biochemical sludge collection tank 16. The sludge output ends of the hydrolysis acidification tank 2, the total biochemical reaction tank 3, and the MBR reaction tank 4 are connected to the input end of the biochemical sludge collection tank 16 through a sludge conveying pipeline 20, and the sludge output end of the biochemical sludge collection tank 16 is connected to the hydrolysis acidification tank 2 and the total biochemical reaction tank 3 through a biochemical sludge discharge pump 17.

[0035] The raw water collection tank 1, the hydrolysis acidification tank 2, the sterilization and disinfection tank 5, and the biochemical sludge collection tank 16 are also provided with a maintenance drain valve 18, and the maintenance drain valve 18 is used for draining water during maintenance.

[0036] Beneficial effects of the utility model: The utility model proposes a biochemical wastewater treatment system, including a raw water collection tank 1, a hydrolysis acidification tank 2, a total biochemical reaction tank 3, an MBR reaction tank 4, and a sterilization and disinfection water tank 5. The output end of the raw water collection tank 1 is connected to the input end of the hydrolysis acidification tank 2 through a raw water lifting pump 6, the output end of the hydrolysis acidification tank 2 is connected to the input end of the total biochemical reaction tank 3, the output end of the total biochemical reaction tank 3 is connected to the input end of the MBR reaction tank 4 through a biochemical reflux pump 7, the output end of the MBR reaction tank 4 is connected to the input end of the sterilization and disinfection water tank 5 through an MBR suction pump 8, and the sterilization and disinfection The output end of the water pool 5 is connected to the external drainage pipe through the discharge water pump 19. The bottom of the hydrolysis acidification tank 2, the total biochemical reaction tank 3, the MBR reaction tank 4, and the sterilization and disinfection water pool 5 is connected with an aeration device 9. The aeration device 9 is used to provide compressed air for the hydrolysis acidification tank 2, the total biochemical reaction tank 3, the MBR reaction tank 4, and the sterilization and disinfection water pool 5 for reaction. The hydrolysis acidification tank 2 and the total biochemical reaction tank 3 are arranged to replace the existing AO process, and the MBR reaction tank 4 is arranged to improve the treatment efficiency; a mechanical grille 13 is provided to pre-filter large-diameter impurities, thereby further improving the treatment efficiency.

[0037] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art, and several modifications and improvements may be made without departing from the concept of the present application, all of which belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustration and are not intended to limit the present application. The actual protection scope of the present application shall be subject to the claims.

Claims

1. A biochemical wastewater treatment system, comprising a raw water collection tank (1), a hydrolysis acidification tank (2), a total biochemical reaction tank (3), an MBR reaction tank (4), and a sterilization and disinfection tank (5), characterized in that: The output end of the raw water collection tank (1) is connected to the input end of the hydrolysis acidification tank (2) through a raw water lifting pump (6), the output end of the hydrolysis acidification tank (2) is connected to the input end of the total biochemical reaction tank (3), the output end of the total biochemical reaction tank (3) is connected to the input end of the MBR reaction tank (4) through a biochemical reflux pump (7), the output end of the MBR reaction tank (4) is connected to the input end of the sterilization and disinfection water tank (5) through an MBR suction pump (8), and the output end of the sterilization and disinfection water tank (5) is connected to an external drainage pipeline through a discharge water pump (19). The bottoms of the hydrolysis acidification tank (2), the total biochemical reaction tank (3), the MBR reaction tank (4), and the sterilization and disinfection water tank (5) are connected to an aeration device (9), and the aeration device (9) is used to provide compressed air for the hydrolysis acidification tank (2), the total biochemical reaction tank (3), the MBR reaction tank (4), and the sterilization and disinfection water tank (5) to react.

2. The biochemical wastewater treatment system according to claim 1, characterized in that: A first butterfly valve (10), a first flow meter (11), and a first check valve (12) are provided in sequence between the raw water lift pump (6) and the input end of the hydrolysis acidification tank (2); the first butterfly valve (10) is used to control the opening and closing of the pipeline; the first flow meter (11) is used to monitor the output flow of the raw water collection tank (1); and the first check valve (12) is used to prevent the output material of the raw water collection tank (1) from flowing back.

3. The biochemical wastewater treatment system according to claim 1, characterized in that: A mechanical grille (13) is also provided in the raw water collection pool (1) at a location far from the raw water lifting pump (6), and the mechanical grille (13) is used to pre-filter large-diameter impurities.

4. The biochemical wastewater treatment system according to claim 3, characterized in that: The raw water collection tank (1) is provided with a sedimentation tank (14) near the mechanical grille (13), and the sedimentation tank (14) plays a role of pre-sedimentation.

5. The biochemical wastewater treatment system according to claim 1, characterized in that: A biochemical water distribution tank is also provided between the raw water collection tank (1) and the hydrolysis acidification tank (2); the output end of the raw water collection tank (1) is connected to the input end of the biochemical water distribution tank via a raw water lifting pump (6); and the output end of the biochemical water distribution tank is connected to the input end of the total biochemical reaction tank (3).

6. The biochemical wastewater treatment system according to claim 1, characterized in that: The total biochemical reaction tank (3) comprises a first biochemical reaction tank (31) and a second biochemical reaction tank (32); the first biochemical reaction tank (31) and the second biochemical reaction tank (32) are both anaerobic and aerobic tanks; the first biochemical reaction tank (31) is used for primary treatment, and the second biochemical reaction tank (32) is used for secondary treatment; the output end of the hydrolysis and acidification tank (2) is connected to the input end of the first biochemical reaction tank (31); the output end of the first biochemical reaction tank (31) is connected to the input end of the second biochemical reaction tank (32); and the output end of the second biochemical reaction tank (32) is connected to the input end of the MBR reaction tank (4).

7. The biochemical wastewater treatment system according to claim 6, characterized in that: The first biochemical reaction tank (31) and the second biochemical reaction tank (32) are provided as backup for each other, and the capacity of the first biochemical reaction tank (31) is smaller than that of the second biochemical reaction tank (32).

8. The biochemical wastewater treatment system according to claim 1, characterized in that: The ends of the raw water lifting pump (6) and the biochemical reflux pump (7) are both provided with stirring heads (15) for mixing and stirring the treated material.

9. The biochemical wastewater treatment system according to claim 1, characterized in that: The hydrolysis acidification tank (2), the total biochemical reaction tank (3), and the MBR reaction tank (4) are also connected to a biochemical sludge collection tank (16); the sludge output ends of the hydrolysis acidification tank (2), the total biochemical reaction tank (3), and the MBR reaction tank (4) are connected to the input end of the biochemical sludge collection tank (16) via a sludge conveying pipeline (20); and the sludge output end of the biochemical sludge collection tank (16) is connected to the hydrolysis acidification tank (2) and the total biochemical reaction tank (3) via a biochemical sludge discharge pump (17).

10. The biochemical wastewater treatment system according to claim 1, characterized in that: The raw water collection tank (1), the hydrolysis acidification tank (2), the sterilization and disinfection tank (5), and the biochemical sludge collection tank (16) are also provided with a maintenance drain valve (18), and the maintenance drain valve (18) is used to drain water during maintenance.

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