Sewage treatment device combining two-stage AO (Anaerobic Oxic) and MBR (Membrane Bioreactor) membrane technologies

Abstract

The utility model relates to a sewage treatment device combining two-stage AO (Anaerobic Oxic) and MBR (Membrane Bio-Reactor) membrane technologies, which is characterized in that sewage to be treated in the sewage treatment device sequentially passes through a water inlet pipe, a first anoxic tank, a first aerobic tank, a second anoxic tank, a second aerobic tank, an MBR membrane tank and a water outlet pipe, and anoxic tank fillers are arranged in the first anoxic tank and the second anoxic tank; aerobic tank suspended fillers are arranged in the first aerobic tank and the second aerobic tank, an MBR membrane is arranged in the MBR membrane tank, the self-priming pump and the ultraviolet disinfection instrument are arranged in the equipment room, an MBR membrane tank water outlet pipe and an MBR membrane tank water outlet pipe are arranged on the wall of the equipment room, and the self-priming pump is arranged on a pipeline between the MBR membrane tank water outlet pipe and the MBR membrane tank water outlet pipe. The sewage treatment device disclosed by the utility model can be used for effectively treating sewage in village and town environment sensitive areas, expressway service areas, high-speed rail stations and other scenes, is a sewage treatment device integrating two-stage AO and MBR membrane technologies, and is good in sewage treatment effect and high in integration level.

Description

Technical Field

[0001] The utility model relates to sewage treatment equipment, in particular to a sewage treatment device which combines two-stage AO and MBR membrane technologies and has simple structure, high integration and good sewage treatment effect. Background Art

[0002] Membrane bioreactor technology (MBR) is the product of the organic combination of membrane separation technology and sewage biological treatment technology. As a deep sewage treatment technology, the MBR process needs to combine pretreatment and secondary biochemical treatment at the front end. The existing biochemical treatment technology, the first-level AO (anoxic tank aerobic tank) treatment process is also called anaerobic / aerobic treatment process, which is the most common process in secondary biochemical treatment technology. The first-level AO treatment process can remove organic pollutants in sewage, and at the same time remove pollutants such as ammonia nitrogen in sewage. However, the problem with the first-level AO treatment process is that the NO3 generated by nitrification reaction in the aerobic tank (O tank) - and NO2 - ions need to flow back to the anoxic pool (pool A) in front of the aerobic pool for denitrification to convert NO3 - and NO2 - The ions are converted into N2 and discharged into the atmosphere. However, the reflux device cannot convert NO3 - and NO2 - All ions flow back to the anoxic pool (pool A), resulting in NO3 - and NO2 - Ion denitrification is not complete and is discharged with the effluent, resulting in NO3 - and NO2 - The ion content exceeds the standard. Therefore, for scenarios where there is a total nitrogen assessment requirement for effluent, this treatment process has certain defects. Utility Model Content

[0003] In view of the above problems, the main purpose of the utility model is to provide a sewage treatment device combining two-stage AO and MBR membrane technology with simple structure, high integration and good sewage treatment effect.

[0004] The utility model solves the above technical problems through the following technical solutions: a sewage treatment device combining two-stage AO and MBR membrane technology, in which sewage to be treated in the sewage treatment device combining two-stage AO and MBR membrane technology passes through an inlet pipe, a first anoxic tank, a first aerobic tank, a second anoxic tank, a second aerobic tank, an MBR membrane tank, and an outlet pipe in sequence.

[0005] The sewage treatment device combining two-stage AO and MBR membrane technology also includes a self-priming pump and an ultraviolet disinfector.

[0006] Water inlet pipes and water holes from the first anoxic pool to the first aerobic pool are arranged on the pool walls on both sides of the first anoxic pool, a first anoxic pool filler bracket is arranged in the first anoxic pool, and the first anoxic pool filler is arranged on the first anoxic pool filler bracket.

[0007] The first aerobic pool is provided with a first aerobic pool suspended filler, the first aerobic pool and the second anoxic pool are provided with a water passage hole from the first aerobic pool to the second anoxic pool on the pool wall, the second anoxic pool filler bracket is provided in the second anoxic pool, and the second anoxic pool filler is provided on the second anoxic pool filler bracket.

[0008] A water passage hole from the second anoxic pool to the second aerobic pool is arranged on the pool wall between the second anoxic pool and the second aerobic pool, and a second aerobic pool suspended filler is arranged in the second aerobic pool.

[0009] A water passage hole from the second aerobic tank to the MBR membrane tank is arranged on the pool wall between the second aerobic tank and the MBR membrane tank, an MBR membrane is arranged in the MBR membrane tank, a self-priming pump and an ultraviolet disinfector are both installed in the equipment room, an MBR membrane tank outlet pipe and an outlet pipe are arranged on the wall of the equipment room, and the self-priming pump is installed on the pipe between the MBR membrane tank outlet pipe and the outlet pipe.

[0010] In a specific implementation example of the utility model, an outlet flow meter is also installed on the pipeline between the outlet pipe and the outlet pipe of the MBR membrane pool.

[0011] In a specific implementation example of the present utility model, the MBR membrane is an ultrafiltration membrane with a pore size of 0.3-1.5 μm.

[0012] In a specific implementation example of the present utility model, the sewage treatment device is a device made of carbon steel installed above the ground.

[0013] In a specific implementation example of the utility model, the distance between the water hole from the first anoxic pool to the first aerobic pool and the bottom of the first anoxic pool is 1 / 8-1 / 5 of the height of the entire first anoxic pool.

[0014] In a specific implementation example of the utility model, the distance between the water hole from the first aerobic pool to the second anoxic pool and the top of the first aerobic pool is 1 / 8-1 / 5 of the height of the entire first aerobic pool.

[0015] In a specific implementation example of the utility model, the distance between the water hole from the second anoxic pool to the second aerobic pool and the bottom of the second anoxic pool is 1 / 8-1 / 5 of the height of the entire second anoxic pool.

[0016] In a specific implementation example of the utility model, the distance between the water hole from the second aerobic tank to the MBR membrane tank and the top of the second aerobic tank is 1 / 8-1 / 5 of the height of the entire second aerobic tank.

[0017] In a specific implementation example of the utility model, the water inlet pipe is located near the top of the first anoxic tank, and the water outlet pipe is located near the bottom of the equipment room.

[0018] In a specific implementation example of the present invention, the bottom end of the first anoxic pool filler bracket is 1 / 8-1 / 6 of the height of the entire first anoxic pool from the bottom of the first anoxic pool; the bottom end of the second anoxic pool filler bracket is 1 / 8-1 / 6 of the height of the entire second anoxic pool from the bottom of the second anoxic pool.

[0019] The positive progressive effect of the utility model is that the sewage treatment device combining the two-stage AO and MBR membrane technology provided by the utility model has the following advantages: the utility model adopts the two-stage AO and MBR membrane treatment process, which can make full use of the carbon source in the incoming water for denitrification and nitrogen removal, and achieve the effect of strong nitrogen removal to ensure that the effluent water quality can stably reach the Class IV water standard limit in the "Surface Water Environmental Quality Standard" GB 3838-2002, and the effluent water quality is higher than the Class A standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002). BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] The following are the names corresponding to the label numbers in this utility model:

[0022] Water inlet pipe 1, first anoxic tank 2, first anoxic tank filler bracket 3, first anoxic tank filler 4, first anoxic tank to first aerobic tank water hole 5, first aerobic tank 6, first aerobic tank suspended filler 7, first aerobic tank to second anoxic tank water hole 8, second anoxic tank 9, second anoxic tank filler bracket 10, second anoxic tank filler 11, second anoxic tank to second aerobic tank water hole 12, second aerobic tank 13, second aerobic tank suspended filler 14, second aerobic tank to MBR membrane tank water hole 15, MBR membrane tank 16, MBR membrane 17, MBR membrane tank outlet pipe 18, outlet flow meter 19, self-priming pump 20, ultraviolet disinfector 21, outlet pipe 22. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model. Figure 1As shown: The utility model provides a sewage treatment device combining two-stage AO and MBR membrane technology. The sewage to be treated in the sewage treatment device combining two-stage AO and MBR membrane technology passes through the water inlet pipe 1, the first anoxic tank 2, the first aerobic tank 6, the second anoxic tank 9, the second aerobic tank 13, the MBR membrane tank 16, and the outlet pipe 22 in sequence.

[0025] A water inlet pipe 1 and a water passage hole 5 from the first anoxic pool to the first aerobic pool are arranged on the pool walls on both sides of the first anoxic pool 2, a first anoxic pool filler bracket 3 is arranged in the first anoxic pool 2, and a first anoxic pool filler 4 is arranged on the first anoxic pool filler bracket 3.

[0026] A first aerobic pool suspended filler 7 is provided in the first aerobic pool 6, a first aerobic pool to second anoxic pool water passage 8 is provided on the pool walls of the first aerobic pool 6 and the second anoxic pool 9, a second anoxic pool filler support 10 is provided in the second anoxic pool 9, and a second anoxic pool filler 11 is provided on the second anoxic pool filler support 10.

[0027] A second anoxic pool to second aerobic pool water passage 12 is provided on the pool wall between the second anoxic pool 9 and the second aerobic pool 13 , and a second aerobic pool suspended filler 14 is provided in the second aerobic pool 13 .

[0028] A water hole 15 from the second aerobic pool to the MBR membrane pool is arranged on the pool wall between the second aerobic pool 13 and the MBR membrane pool 16, and an MBR membrane 17 is arranged in the MBR membrane pool 16. The sewage treatment device combining the two-stage AO and MBR membrane technology proposed in the utility model also includes a self-priming pump 20 and an ultraviolet disinfection device 21, and the self-priming pump 20 and the ultraviolet disinfection device 21 are both installed in the equipment room, and the wall of the equipment room is provided with an MBR membrane pool outlet pipe 18 and an outlet pipe 22, and the self-priming pump 20 is installed on the pipe between the MBR membrane pool outlet pipe 18 and the outlet pipe 22. In the specific implementation process, an outlet flow meter 19 and the ultraviolet disinfection device 21 are also installed on the pipe between the MBR membrane pool outlet pipe 18 and the outlet pipe 22.

[0029] In the specific implementation process of the present invention: the MBR membrane 17 in the present invention is an ultrafiltration membrane with a pore size of 0.3-1.5 μm; the sewage treatment device in the present invention is a device made of carbon steel installed above the ground.

[0030] In the specific implementation process, the distance between the water hole 5 from the first anoxic tank to the first aerobic tank and the bottom of the first anoxic tank 2 is 1 / 8-1 / 5 of the height of the entire first anoxic tank 2, the distance between the water hole 8 from the first aerobic tank to the second anoxic tank and the top of the first aerobic tank 6 is 1 / 8-1 / 5 of the height of the entire first aerobic tank 6, the distance between the water hole 12 from the second anoxic tank to the second aerobic tank and the bottom of the second anoxic tank 9 is 1 / 8-1 / 5 of the height of the entire second anoxic tank 9, the distance between the water hole 15 from the second aerobic tank to the MBR membrane tank and the top of the second aerobic tank 13 is 1 / 8-1 / 5 of the height of the entire second aerobic tank 13, the water inlet pipe 1 is located near the top of the first anoxic tank 2, and the water outlet pipe 22 is located near the bottom of the equipment room.

[0031] The bottom end of the first anoxic pool filler bracket 3 in the utility model is 1 / 8-1 / 6 of the height of the entire first anoxic pool 2 from the bottom thereof; the bottom end of the second anoxic pool filler bracket 10 is 1 / 8-1 / 6 of the height of the entire second anoxic pool 9 from the bottom thereof. In the specific implementation process, other values ​​or ranges are selected as needed.

[0032] Here is a concrete example:

[0033] The sewage enters the first anoxic tank 2 through the DN50 water inlet pipe 1. The first anoxic tank filler 4 is provided in the first anoxic tank 2. The facultative bacteria attached and grown on the first anoxic tank filler 4 can denitrify the nitrate nitrogen pollutants in the sewage. The first anoxic tank filler 4 is fixed to the first anoxic tank filler bracket 3 by a fiber rope. After the sewage stays in the first anoxic tank 2 for 3 hours, it enters the first aerobic tank 6 through the first anoxic tank to first aerobic tank water passage 5 with a size of 300×300 and a distance of 200mm from the bottom of the hole. The first aerobic tank suspended filler 7 is provided in the first aerobic tank 6. The aerobic microorganisms attached and grown on the first aerobic tank suspended filler 7 can aerobically degrade the organic pollutants, ammonia nitrogen and other pollutants in the sewage. After the sewage stays in the first aerobic tank 6 for 5 hours, it enters the second anoxic tank through the first aerobic tank to second anoxic tank water passage 8 with a size of 300×200mm and a distance of 200mm from the center of the hole to the top plate of the equipment. In the pool 9, the second anoxic pool 9 is also provided with a second anoxic pool filler support 10 for fixing the second anoxic pool filler 11. After the sewage undergoes a denitrification and denitrification reaction residence time of 3-4 hours in the second anoxic pool 9, it enters the second aerobic pool 13 through a second anoxic pool to second aerobic pool water passage hole 12 with a size of 300×300 and a distance of 200mm from the bottom of the hole. The second aerobic pool 13 is also provided with a suspended filler 14. The pollutants mainly undergo further nitrification reaction and COD degradation process in the second aerobic pool 13. The sewage stays in the second aerobic pool 13 for about 5-6 hours. The entire two-stage AO biological treatment process can enhance the removal of pollutants such as COD, ammonia nitrogen and total nitrogen in the incoming water. Finally, the sewage passes through the second aerobic pool with a hole center of 300mm from the top plate of the equipment and a size of 300×200mm to the MBR membrane pool 16. The MBR membrane 17 is set in the MBR membrane pool 16. The MBR membrane adopts an ultrafiltration membrane with a pore size of about 0.4μm, which can effectively intercept the activated sludge and most of the suspended solids, thereby realizing the mud and water separation in the system. At the same time, the MBR membrane can intercept the large molecular organic pollutants in the system and return them to the front end of the system for re-treatment in the form of reflux, ensuring that the effluent water quality can stably reach the Class IV water standard limit in the "Surface Water Environmental Quality Standard" GB 3838-2002, and the effluent water quality is higher than the Class A standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002).

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sewage treatment device combining two-stage AO and MBR membrane technology, characterized in that: The sewage to be treated in the sewage treatment device combining the two-stage AO and MBR membrane technology passes through the water inlet pipe, the first anoxic tank, the first aerobic tank, the second anoxic tank, the second aerobic tank, the MBR membrane tank, and the water outlet pipe in sequence. The sewage treatment device combining two-stage AO and MBR membrane technology also includes a self-priming pump and an ultraviolet disinfector; Water inlet pipes and water holes from the first anoxic pool to the first aerobic pool are arranged on the pool walls on both sides of the first anoxic pool, a first anoxic pool filler bracket is arranged in the first anoxic pool, and the first anoxic pool filler is arranged on the first anoxic pool filler bracket; The first aerobic pool is provided with a first aerobic pool suspended filler, the first aerobic pool and the second anoxic pool are provided with water holes from the first aerobic pool to the second anoxic pool on the pool walls, the second anoxic pool filler support is provided in the second anoxic pool, and the second anoxic pool filler support is provided with the second anoxic pool filler; A water passage hole from the second anoxic pool to the second aerobic pool is arranged on the pool wall between the second anoxic pool and the second aerobic pool, and a second aerobic pool suspended filler is arranged in the second aerobic pool; A water passage hole from the second aerobic tank to the MBR membrane tank is arranged on the pool wall between the second aerobic tank and the MBR membrane tank, an MBR membrane is arranged in the MBR membrane tank, a self-priming pump and an ultraviolet disinfector are both installed in the equipment room, an MBR membrane tank outlet pipe and an outlet pipe are arranged on the wall of the equipment room, and the self-priming pump is installed on the pipe between the MBR membrane tank outlet pipe and the outlet pipe.

2. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: An outlet flow meter is also installed on the pipe between the outlet pipe and the outlet pipe of the MBR membrane pool.

3. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: The MBR membrane is an ultrafiltration membrane with a pore size of 0.3-1.5 μm.

4. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: The sewage treatment plant is a carbon steel device installed above the ground.

5. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: The distance between the water hole from the first anoxic pool to the first aerobic pool and the bottom of the first anoxic pool is 1 / 8-1 / 5 of the height of the entire first anoxic pool.

6. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: The distance between the water hole from the first aerobic pool to the second anoxic pool and the top of the first aerobic pool is 1 / 8-1 / 5 of the height of the entire first aerobic pool.

7. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: The distance between the water hole from the second anoxic pool to the second aerobic pool and the bottom of the second anoxic pool is 1 / 8-1 / 5 of the height of the entire second anoxic pool.

8. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: The distance from the water hole from the second aerobic tank to the MBR membrane tank to the top of the second aerobic tank is 1 / 8-1 / 5 of the height of the entire second aerobic tank.

9. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: The water inlet pipe is located near the top of the first anoxic pool, and the water outlet pipe is located near the bottom of the equipment room.

10. The sewage treatment device combining two-stage AO and MBR membrane technology according to claim 1 is characterized in that: The bottom end of the first anoxic pool filler bracket is 1 / 8-1 / 6 of the height of the entire first anoxic pool away from the bottom of the first anoxic pool; the bottom end of the second anoxic pool filler bracket is 1 / 8-1 / 6 of the height of the entire second anoxic pool away from the bottom of the second anoxic pool.

Images