CN212127901U - Sequencing batch type composite nitrogen and phosphorus removal sewage treatment device - Google Patents
Sequencing batch type composite nitrogen and phosphorus removal sewage treatment device Download PDFInfo
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- CN212127901U CN212127901U CN202020396591.XU CN202020396591U CN212127901U CN 212127901 U CN212127901 U CN 212127901U CN 202020396591 U CN202020396591 U CN 202020396591U CN 212127901 U CN212127901 U CN 212127901U
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Abstract
The utility model discloses a sequencing batch formula composite nitrogen and phosphorus removal sewage treatment plant, include: a flexible filler is suspended in the first reaction tank, a central water distributor is inserted into the first reaction tank and extends to the lower part of the flexible filler, an aeration component is arranged at the bottom of the first reaction tank, a sludge discharge pipe is arranged at the bottom of the first reaction tank, and a first water discharge port is arranged at the top of the first reaction tank; the light filter material is arranged in the middle of the second reaction tank, and divides the second reaction tank into an upper part and a lower part, and the upper part of the second reaction tank is communicated with the first water discharge port; the denitrification filler and autotrophic bacteria are arranged inside the denitrification tank, the dephosphorization filler is arranged inside the dephosphorization tank, and the denitrification tank is communicated with the lower part of the second reaction tank; the clean water tank is communicated with the dephosphorization tank and is connected with a water outlet pipe; the first aeration fan is connected to the water outlet pipe through the gas stripping water outlet pump, and the second aeration fan is connected to the sludge discharge pipe through the gas stripping sludge discharge pump. The device is suitable for suburb village and town areas, scenic spots and the like with high discharge standard in the process of distributed domestic sewage treatment.
Description
Technical Field
The utility model belongs to the technical field of environmental pollution thing control, more specifically relates to a sequencing batch formula composite nitrogen and phosphorus removal sewage treatment plant who is applicable to distributed domestic sewage and sensitive area sewage.
Background
Along with the formulation of the water treatment discharge standard in rural areas and the higher and higher requirements of people on the water environment quality, the water quality requirement for water environment treatment is higher and higher, and the requirement on the discharge limit value of nitrogen and phosphorus pollutants in a sensitive area is also stricter, so that a process device suitable for the treatment of distributed domestic sewage and sewage in the sensitive area is urgently needed, the operation and the maintenance are convenient, and the treated sewage can meet the discharge standard. At present, the SBR (sequencing batch activated sludge process) is a recommended rural sewage treatment process, and is particularly suitable for places with large intermittent discharge and flow change, and particularly for rural areas with large water quality and water quantity fluctuation, but under the low-temperature condition in winter, the microbial quantity in a SBR (sequencing batch activated sludge process) process system is obviously insufficient, and in a sensitive area with high discharge standard, the single SBR treatment effect is obviously poor.
Therefore, it is desired to develop a sequencing batch type composite nitrogen and phosphorus removal sewage treatment device which can maintain the number of microorganisms under low temperature conditions, has good effluent quality and low automatic control requirement, and can be applied to suburb village and town areas, scenic spots and the like with high discharge standard of sensitive areas involved in distributed domestic sewage treatment processes.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compound nitrogen and phosphorus removal sewage treatment plant of sequencing batch formula can be applicable to the high emission standard in sensitive area that low temperature condition and distributed domestic sewage treatment in-process related winter, reaches quick getting rid of organic pollutant, the effect of high-efficient nitrogen and phosphorus removal to structure and process are simple, and the operation is nimble, reasonable in design, degree of automation is high, can effectively improve work efficiency and energy-concerving and environment-protective.
In order to achieve the above object, the utility model provides a sequencing batch type composite nitrogen and phosphorus removal sewage treatment device, include:
the sequencing batch biological treatment unit comprises a first reaction tank, a central water distributor and an aeration assembly, wherein a flexible filler is suspended in the first reaction tank, the central water distributor is inserted into the first reaction tank and extends to the lower part of the flexible filler, the aeration assembly is arranged at the bottom of the first reaction tank, a sludge discharge pipe is arranged at the bottom of the first reaction tank, and a first water discharge port is arranged at the top of the first reaction tank;
the filtering unit comprises a second reaction tank and a light filtering material, the light filtering material is arranged in the middle of the second reaction tank and divides the second reaction tank into an upper part and a lower part, and the upper part of the second reaction tank is communicated with the first water discharge port;
the system comprises a nitrogen and phosphorus removal unit, a nitrogen and phosphorus removal unit and a reaction tank, wherein the nitrogen and phosphorus removal unit comprises a nitrogen removal tank and a phosphorus removal tank which are sequentially connected, nitrogen removal filler and autotrophic bacteria are arranged in the nitrogen removal tank, the phosphorus removal tank is internally provided with the phosphorus removal filler, and the nitrogen removal tank is communicated with the lower part of a second reaction tank;
the clean water tank is communicated with the dephosphorization tank and is connected with a water outlet pipe;
the air stripping system comprises a first aeration fan, a second aeration fan, an air stripping water outlet pump and an air stripping sludge discharge pump, wherein the first aeration fan is connected to the water outlet pipe through the air stripping water outlet pump, and the second aeration fan is connected to the sludge discharge pipe through the air stripping sludge discharge pump.
Optionally, the adjusting buffer tank is arranged between the second reaction tank and the denitrification tank, a baffle plate is arranged on the bottom surface of the adjusting buffer tank, the baffle plate is arranged in the vertical direction and is lower than the depth of the adjusting buffer tank, the baffle plate divides the adjusting buffer tank into two sides, one side of the adjusting buffer tank is communicated with the lower part of the second reaction tank, and the other side of the adjusting buffer tank is communicated with the denitrification tank.
Optionally, a backwashing aeration pipe is arranged at the bottom of one side of the adjusting buffer tank, and a backwashing water inlet pipe and a backwashing water drain pipe are arranged at the bottom of the other side of the adjusting buffer tank;
and backwashing aeration perforated pipes are respectively arranged at the bottoms of the second reaction tank, the denitrification tank and the dephosphorization tank.
Optionally, the backwash aeration pipe, the backwash aeration perforated pipe, the gas stripping water pump and the aeration assembly are respectively connected to the first aeration fan through electromagnetic valves.
Optionally, the central water distributor includes a central cylinder and a reflection plate, one end of the central cylinder is connected to the water inlet pipe, the other end of the central cylinder extends to a position below the flexible packing along a vertical direction, and the reflection plate is horizontally disposed in the first reaction tank and located below the central cylinder.
Optionally, the aeration assembly includes an aeration pipe and a plurality of aeration heads, and the plurality of aeration heads are disposed at the bottom of the first reaction tank and connected to the first aeration fan through the aeration pipe.
Optionally, the flexible filler is root-like and/or aquatic weed-like, and the light filter material is at least one of polyurethane sponge, ceramsite, polyvinyl chloride and polypropylene copolymerized honeycomb filler and polyurethane suspended ball filler.
Optionally, the second reaction tank further comprises a pair of perforated plates, edges of the pair of perforated plates are attached to the side wall of the second reaction tank respectively, the pair of perforated plates are parallel to each other, and the light filter material is filled between the pair of perforated plates.
Optionally, the denitrification filler is at least one of sulfur, pyrite, zeolite, dolomite and limestone, and the dephosphorization filler is at least one of volcanic rock, foamed iron and foamed aluminum.
Optionally, the first water discharge port includes a triangular overflow weir and an overflow weir groove, the triangular overflow weir is disposed on the top of the first reaction tank, the overflow weir groove surrounds the triangular overflow weir, and the overflow weir groove is communicated with the second reaction tank.
The beneficial effects of the utility model reside in that:
1. sewage is introduced into the first reaction tank through the central water distributor, organic matters in the sewage and microorganisms in the tank fully absorb oxygen through the aeration assembly, pollutants are subjected to biochemical decomposition, and flexible fillers are suspended, so that impact load can be effectively responded, the number of microorganisms is ensured, the nitrification performance in winter is stabilized, and the operation effect under the low-temperature condition is improved; the sludge precipitated after biochemical decomposition is discharged from the sludge discharge pipe, the sewage is further filtered by light filter materials through the second reaction tank, nitrogen and phosphorus pollutants are removed through the nitrogen and phosphorus removal unit, and the sewage is finally stored in a clean water tank so as to facilitate the reuse of the effluent. The device is particularly suitable for village sewage treatment in the sensitive area, can effectively solve the problems of scattered sewage treatment stations, difficult operation and maintenance, large fluctuation of water quality and water quantity and the like, can effectively ensure the standard reaching rate under the low-temperature condition, and realizes the high discharge standard of the sensitive area.
2. The autotrophic nitrogen removal can be realized, no additional carbon source is needed, and the microorganisms in the system can be screened and domesticated, so that the high-efficiency and special inorganic chemoautotrophic bacteria are obtained, and are combined with the nitrogen removal filler, so that the phosphorus removal filler is utilized while the deep nitrogen removal is effectively carried out, and the high-efficiency phosphorus removal and the resource recycling are realized.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
FIG. 1 is a top view of a batch-type combined denitrification and dephosphorization wastewater treatment plant according to an embodiment of the present invention.
Fig. 2 shows a cross-sectional view a-a of fig. 1.
Fig. 3 shows a cross-sectional view B-B of fig. 1.
Fig. 4 shows an internal structural view of a stripper pump according to an embodiment of the invention.
Description of the reference numerals
1. A water inlet pipe; 2. a water inlet pump; 3. an aeration pipe; 4. an aeration head; 5. a central barrel; 6. a reflective plate; 7. a flexible filler; 8. a triangular overflow weir; 9. an overflow weir trough; 10. backwashing the aeration pipe; 11. backwashing the water inlet pipe; 12. backwashing the drain pipe; 13. a sludge discharge pipe; 14. a gas stripping dredge pump; 15. a water outlet pipe; 16. backwashing the aeration perforated pipe; 17. a perforated plate; 18. a baffle plate; 19. a light filter material; 20. phosphorus removal filler; 21. an inspection opening; 22. a first aeration fan; 23. gas stripping water suction pipe; 24. gas stripping is carried out on the gas supply pipe; 25. a second aeration fan; 26. a sequencing batch biological treatment unit; 27. a filtration unit; 28. Adjusting a buffer pool; 29. a denitrification tank; 30. a phosphorus removal tank; 31. a clean water tank.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The utility model discloses a sequencing batch formula composite nitrogen and phosphorus removal sewage treatment plant, include:
the sequencing batch biological treatment unit comprises a first reaction tank, a central water distributor and an aeration assembly, wherein flexible filler is suspended in the first reaction tank, the central water distributor is inserted into the first reaction tank and extends to the lower part of the flexible filler, the aeration assembly is arranged at the bottom of the first reaction tank, a sludge discharge pipe is arranged at the bottom of the first reaction tank, and a first water discharge port is arranged at the top of the first reaction tank;
the filtering unit comprises a second reaction tank and a light filtering material, the light filtering material is arranged in the middle of the second reaction tank and divides the second reaction tank into an upper part and a lower part, and the upper part of the second reaction tank is communicated with the first water outlet;
the denitrification and dephosphorization unit comprises a denitrification tank and a dephosphorization tank which are sequentially connected, wherein denitrification filler and autotrophic bacteria are arranged in the denitrification tank, the dephosphorization filler is arranged in the dephosphorization tank, and the denitrification tank is communicated with the lower part of the second reaction tank;
the clean water tank is communicated with the dephosphorization tank and is connected with a water outlet pipe;
the air stripping system comprises a first aeration fan, a second aeration fan, an air stripping water outlet pump and an air stripping sludge discharge pump, wherein the first aeration fan is connected to the water outlet pipe through the air stripping water outlet pump, and the second aeration fan is connected to the sludge discharge pipe through the air stripping sludge discharge pump.
Specifically, sewage is introduced into a first reaction tank through a central water distributor, organic matters in the sewage and microorganisms in the tank fully absorb oxygen through an aeration assembly, pollutants are subjected to biochemical decomposition, and flexible fillers are suspended, so that impact load can be effectively coped with, the number of microorganisms is ensured, the nitrification performance in winter is stabilized, and the operation effect under the low-temperature condition is improved; the sludge precipitated after biochemical decomposition is discharged from the sludge discharge pipe, the sewage is further filtered by light filter materials through the second reaction tank, nitrogen and phosphorus pollutants are removed through the nitrogen and phosphorus removal unit, and the sewage is finally stored in a clean water tank so as to facilitate the reuse of the effluent. The device is particularly suitable for village sewage treatment in the sensitive area, can effectively solve the problems of scattered sewage treatment stations, difficult operation and maintenance, large fluctuation of water quality and water quantity and the like, can effectively ensure the standard reaching rate under the low-temperature condition, and realizes the high discharge standard of the sensitive area.
Furthermore, the nitrogen and phosphorus removal unit can realize autotrophic nitrogen removal, does not need an additional carbon source, and can screen and domesticate microorganisms in the system, so that high-efficiency and special inorganic chemoautotrophic bacteria are obtained, and are combined with the nitrogen removal filler, so that the phosphorus removal filler is utilized while deep nitrogen removal is effectively carried out, and high-efficiency phosphorus removal and resource recycling are realized.
As an alternative scheme, the adjusting buffer tank is arranged between the second reaction tank and the denitrification tank, a baffle plate is arranged on the bottom surface of the adjusting buffer tank, the baffle plate is arranged in the vertical direction and is lower than the depth of the adjusting buffer tank, the baffle plate separates the adjusting buffer tank into two sides, one side of the adjusting buffer tank is communicated with the lower part of the second reaction tank, and the other side of the adjusting buffer tank is communicated with the denitrification tank.
Specifically, the adjusting buffer tank is used for buffering and adjusting water quality and water quantity, sewage filtered by the light filter material in the second reaction tank enters one side of a baffle plate in the adjusting buffer tank from the bottom of the adjusting buffer tank, flows to the other side of the baffle plate in the adjusting buffer tank through the baffle plate, and enters the denitrification tank from the bottom of the baffle plate.
As an alternative, a backwashing aeration pipe is arranged at the bottom of one side of the adjusting buffer tank, and a backwashing water inlet pipe and a backwashing water drain pipe are arranged at the bottom of the other side of the adjusting buffer tank;
the bottoms of the second reaction tank, the denitrification tank and the dephosphorization tank are respectively provided with a backwashing aeration perforated pipe.
Specifically, a backwashing structure is arranged at the bottom of the backwashing container, so that the cleaning and the maintenance are convenient.
As an alternative scheme, the backwashing aeration pipe, the backwashing aeration perforated pipe, the gas-stripping water outlet pump and the aeration component are respectively connected to the first aeration fan through electromagnetic valves, so that the operation is convenient.
As an alternative scheme, the central water distributor comprises a central cylinder and a reflecting plate, one end of the central cylinder is connected to the water inlet pipe, the other end of the central cylinder extends to the position below the flexible filler along the vertical direction, and the reflecting plate is horizontally arranged in the first reaction tank and located below the central cylinder.
Specifically, sewage enters the first reaction tank through the central cylinder along the vertical direction and is reflected upwards under the blocking action of the reflecting plate, so that uniform water distribution is realized.
As an alternative scheme, the aeration component comprises an aeration pipe and a plurality of aeration heads, and the plurality of aeration heads are arranged at the bottom of the first reaction tank and are connected to the first aeration fan through the aeration pipe.
Specifically, the aeration is carried out through a plurality of aeration heads at the bottom of the first reaction tank, so that organic matters in the sewage and microorganisms in the tank fully absorb oxygen, and pollutants are biochemically decomposed.
As an alternative, the flexible filler is root-like and/or aquatic weed-like, and the light filter material is at least one of polyurethane sponge, ceramsite, polyvinyl chloride and polypropylene copolymerized honeycomb filler and polyurethane suspended ball filler.
Further, the ratio of the root-imitating filler to the aquatic weed-imitating filler is 0: 1 or 1:1 or 1: 0;
polyurethane sponge: ceramsite: polyvinyl chloride and polypropylene copolymerized honeycomb filler: the polyurethane suspension ball filler is (1-2): (0-1): (0-1): (1-2).
As an alternative, the second reaction tank also comprises a pair of perforated plates, the edges of the pair of perforated plates are respectively attached to the side wall of the second reaction tank, the pair of perforated plates are parallel to each other, and the light filter material is filled between the pair of perforated plates.
Furthermore, a pair of perforated plates are also arranged in the denitrification tank, and the denitrification filler is arranged between the pair of perforated plates; the phosphorus removal tank is also provided with a pair of perforated plates and phosphorus removal filler is arranged between the pair of perforated plates.
As an alternative, the denitrification filler is at least one of sulfur, pyrite, zeolite, dolomite and limestone, and the dephosphorization filler is at least one of volcanic rock, foamed iron and foamed aluminum.
Specifically, sulfur: pyrite: zeolite: dolomite: limestone (1-2): (0-2): (0-2): (0-2): (1-2);
the phosphorus removal filler produces Fe2+, Fe3+, Al3+, Fe2+, Fe3+ and Al3+ which are subjected to flocculation reaction with phosphate and adsorbed on the filler, the phosphate can be removed through the adsorption effect of the filler, and the filler has very high adsorption capacity and can be periodically leached and regenerated.
As an alternative scheme, the first drainage port comprises a triangular overflow weir and an overflow weir groove, the triangular overflow weir is arranged at the top of the first reaction tank, the overflow weir groove surrounds the triangular overflow weir, and the overflow weir groove is communicated with the second reaction tank.
Examples
FIG. 1 is a top view of the batch-type combined denitrification and dephosphorization wastewater treatment plant according to the embodiment; FIG. 2 shows a cross-sectional view A-A of FIG. 1; FIG. 3 shows a cross-sectional view B-B of FIG. 1; fig. 4 shows an internal structural view of the stripping pump of the present embodiment.
As shown in fig. 1 to 4, the sequencing batch type composite nitrogen and phosphorus removal sewage treatment device comprises:
the sequencing batch biological treatment unit 26 comprises a first reaction tank, a central water distributor and an aeration component, wherein a flexible filler 7 is suspended in the first reaction tank, the central water distributor is inserted into the first reaction tank and extends to the lower part of the flexible filler 7, the aeration component is arranged at the bottom of the first reaction tank, a sludge discharge pipe 13 is arranged at the bottom of the first reaction tank, and a first water discharge port is arranged at the top of the first reaction tank;
the central water distributor comprises a central cylinder 5 and a reflecting plate 6, one end of the central cylinder 5 is connected to the water inlet pipe 1, the other end of the central cylinder 5 extends to the position below the flexible filler 7 along the vertical direction, and the reflecting plate 6 is horizontally arranged in the first reaction tank and is positioned below the central cylinder 5; the aeration component comprises an aeration pipe 3 and a plurality of aeration heads 4, the plurality of aeration heads 4 are arranged at the bottom of the first reaction tank and are connected to a first aeration fan 22 through the aeration pipe 3; the flexible filler 7 is root-imitating and aquatic weed-imitating, wherein the ratio of the root-imitating and the aquatic weed-imitating is 1: 1; the first drainage port comprises a triangular overflow weir 8 and an overflow weir groove 9, the triangular overflow weir 8 is arranged at the top of the first reaction tank, the overflow weir groove 9 surrounds the triangular overflow weir 8, and the overflow weir groove 9 is communicated with the second reaction tank;
the filtering unit 27 comprises a second reaction tank and a light filtering material 19, the light filtering material 19 is arranged in the middle of the second reaction tank and divides the second reaction tank into an upper part and a lower part, and the upper part of the second reaction tank is communicated with the overflow weir groove 9;
the second reaction tank also comprises a pair of perforated plates 17, the edges of the pair of perforated plates 17 are respectively attached to the side wall of the second reaction tank, the pair of perforated plates 17 are parallel to each other, a light filter material 19 is filled between the pair of perforated plates 17, the light filter material 19 is polyurethane sponge and ceramsite, wherein the ratio of the polyurethane sponge to the ceramsite is 2: 1;
a baffle plate 18 is arranged on the bottom surface of the adjusting buffer tank 28, the baffle plate 18 is arranged in the vertical direction and is lower than the depth of the adjusting buffer tank 18 in height, the baffle plate 18 divides the adjusting buffer tank 28 into two sides, one side of the adjusting buffer tank 28 is communicated with the lower part of the second reaction tank, and the other side of the adjusting buffer tank 28 is communicated with the nitrogen and phosphorus removal unit;
wherein, the bottom of one side of the adjusting buffer pool 28 is provided with a backwashing aeration pipe 10, and the bottom of the other side of the adjusting buffer pool 28 is provided with a backwashing water inlet pipe 11 and a backwashing water outlet pipe 12;
the nitrogen and phosphorus removal unit comprises a nitrogen removal tank 29 and a phosphorus removal tank 30 which are sequentially connected, wherein a nitrogen removal filler and autotrophic bacteria are arranged in the nitrogen removal tank 29, a phosphorus removal filler 20 is arranged in the phosphorus removal tank 30, and the nitrogen removal tank 29 is communicated with the regulating buffer tank 28;
wherein, the denitrification filler is sulfur and dolomite, the ratio of the sulfur to the dolomite is 1:1, the dephosphorization filler 20 is volcanic rock and foam iron, the ratio is 1: 2;
the clean water tank 31 is communicated with the dephosphorization tank 30, and the clean water tank 31 is connected with the water outlet pipe 15;
the gas stripping system comprises a first aeration fan 22, a second aeration fan 25, a gas stripping water outlet pump and a gas stripping sludge discharge pump 14, wherein the first aeration fan 22 is connected to the water outlet pipe 15 through the gas stripping water outlet pump, the gas stripping water outlet is controlled through an electromagnetic valve, and the second aeration fan 25 is connected to the sludge discharge pipe 13 through the gas stripping sludge discharge pump 14;
the air-lift water outlet pump comprises an air-lift water suction pipe 23 and an air-lift air supply pipe 24, the first aeration fan 22 is connected with the air-lift air supply pipe 24, air-lift water is finally discharged through the air-lift water suction pipe 23, the air-lift water is controlled by an electromagnetic valve, and an air-lift sludge discharge system is similar to the air-lift water outlet system;
wherein, the bottoms of the second reaction tank, the denitrification tank 29 and the dephosphorization tank 30 are respectively provided with a backwashing aeration perforated pipe 16; the backwashing aeration pipe 10, the backwashing aeration perforated pipe 16, the gas stripping water pump and the aeration component are respectively connected with a first aeration fan 22 through electromagnetic valves;
wherein, a pair of perforated plates 17 is also arranged in the denitrification tank 29, and the denitrification filler is arranged between the pair of perforated plates 17; the phosphorus removal tank 30 is also provided with a pair of perforated plates, phosphorus removal filler 20 is arranged between the pair of perforated plates 17;
wherein, the sequencing batch biological treatment unit 26, the filtering unit 27, the adjusting buffer tank 28, the denitrification tank 29 and the dephosphorization tank 30 are all provided with inspection ports 21;
the sewage treatment in a sequencing batch biological treatment unit comprises the following steps:
(1) water inflow and drainage: the time sequence is that sewage is provided for the first reaction tank, treated sewage is discharged at the same time, the water inlet pump is started, the sewage to be treated is pumped into the first reaction tank through the central cylinder 5 and the reflecting plate 6, and the treated water in the tank is ejected out of the tank through the overflow weir; until the new sewage reaches the highest operation liquid level.
(2) Aeration: the time sequence is aerated, water is not fed or drained, organic matters in the sewage and microorganisms in the pool fully absorb oxygen through aeration, and pollutants are biochemically decomposed at the time;
(3) precipitation and sludge discharge: the time sequence is precipitation and sludge discharge, water is not fed, water is not discharged, aeration is not carried out in the period, the reaction unit is in a standing state, and efficient sludge-water separation is carried out; and the separated sludge is discharged out of the pool through a gas stripping sludge pump in the period.
The whole device carries out sewage treatment and comprises the following steps: sewage enters a central cylinder 5 in a sequencing batch biological treatment unit 26 through a water inlet pipe 1 through a water inlet pump 2, flows through a reflecting plate 6 to realize water distribution, flows from bottom to top through a flexible filler 7, then passes through a triangular overflow weir 8, enters an overflow weir groove 9, and then flows into a filtering unit 27, the water in the area flows from top to bottom through a light filter material 19, then flows into a regulating buffer tank 28 through the bottom, passes through an internal baffle plate 18, then enters a nitrogen and phosphorus removal unit from the bottom, flows from bottom to top through a nitrogen removal tank 29, passes through a phosphorus removal tank 30 from top to bottom, finally enters a clean water tank 31 from the bottom, the water in the clean water tank 31 is stripped out through a water outlet pipe 15, and the effluent in the clean water tank 31 can be effectively used for irrigation and toilet flushing recycling.
The device adopts the process flow of combining a HNSBR (hybrid non-boiler sequencing batch reactor) sequencing batch biological treatment unit with a DNAP (denitrifying and phosphorous adsorption) deep denitrification and dephosphorization, integrates the composite sludge membrane mixing process into the SBR technology without a decanter, can effectively deal with impact load, controls the quantity of microorganisms, stabilizes the nitration performance in winter, and simultaneously adopts the DNAP deep denitrification and dephosphorization process to realize autotrophic denitrification and efficient dephosphorization so as to obtain high-standard effluent.
The device also has the characteristics of flexible operation mode, high automation degree and the like, is particularly suitable for village sewage treatment in sensitive areas, can effectively solve the problems of scattered stations of sewage treatment stations, difficult operation and maintenance, large fluctuation of water quality and water quantity and the like, and can effectively ensure stable operation under the low-temperature condition and realize the high discharge standard of a sensitive area.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The utility model provides a formula of preface is compound denitrogenation dephosphorization sewage treatment plant which characterized in that includes:
the sequencing batch biological treatment unit comprises a first reaction tank, a central water distributor and an aeration assembly, wherein a flexible filler is suspended in the first reaction tank, the central water distributor is inserted into the first reaction tank and extends to the lower part of the flexible filler, the aeration assembly is arranged at the bottom of the first reaction tank, a sludge discharge pipe is arranged at the bottom of the first reaction tank, and a first water discharge port is arranged at the top of the first reaction tank;
the filtering unit comprises a second reaction tank and a light filtering material, the light filtering material is arranged in the middle of the second reaction tank and divides the second reaction tank into an upper part and a lower part, and the upper part of the second reaction tank is communicated with the first water discharge port;
the system comprises a nitrogen and phosphorus removal unit, a nitrogen and phosphorus removal unit and a reaction tank, wherein the nitrogen and phosphorus removal unit comprises a nitrogen removal tank and a phosphorus removal tank which are sequentially connected, nitrogen removal filler and autotrophic bacteria are arranged in the nitrogen removal tank, the phosphorus removal tank is internally provided with the phosphorus removal filler, and the nitrogen removal tank is communicated with the lower part of a second reaction tank;
the clean water tank is communicated with the dephosphorization tank and is connected with a water outlet pipe;
the air stripping system comprises a first aeration fan, a second aeration fan, an air stripping water outlet pump and an air stripping sludge discharge pump, wherein the first aeration fan is connected to the water outlet pipe through the air stripping water outlet pump, and the second aeration fan is connected to the sludge discharge pipe through the air stripping sludge discharge pump.
2. The sequencing batch composite nitrogen and phosphorus removal sewage treatment plant according to claim 1, further comprising an adjusting buffer tank, wherein the adjusting buffer tank is arranged between the second reaction tank and the nitrogen removal tank, a baffle plate is arranged on the bottom surface of the adjusting buffer tank, the baffle plate is arranged along the vertical direction and is lower than the adjusting buffer tank in height, the baffle plate divides the adjusting buffer tank into two sides, one side of the adjusting buffer tank is communicated with the lower part of the second reaction tank, and the other side of the adjusting buffer tank is communicated with the nitrogen removal tank.
3. The sequencing batch composite nitrogen and phosphorus removal sewage treatment plant according to claim 2, wherein a backwash aeration pipe is arranged at the bottom of one side of the regulating buffer tank, and a backwash water inlet pipe and a backwash water drain pipe are arranged at the bottom of the other side of the regulating buffer tank;
and backwashing aeration perforated pipes are respectively arranged at the bottoms of the second reaction tank, the denitrification tank and the dephosphorization tank.
4. The sequencing batch composite nitrogen and phosphorus removal sewage treatment plant according to claim 3, wherein the backwash aeration pipe, the backwash aeration perforated pipe, the stripping water pump and the aeration assembly are respectively connected to the first aeration fan through electromagnetic valves.
5. The sequencing batch composite nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein the central water distributor comprises a central cylinder and a reflecting plate, one end of the central cylinder is connected to the water inlet pipe, the other end of the central cylinder extends to a position below the flexible packing along the vertical direction, and the reflecting plate is horizontally arranged in the first reaction tank and positioned below the central cylinder.
6. The sewage treatment plant of claim 1, wherein the aeration assembly comprises an aeration pipe and a plurality of aeration heads, and the plurality of aeration heads are arranged at the bottom of the first reaction tank and connected to the first aeration fan through the aeration pipe.
7. The sequencing batch composite nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein the flexible filler is root-like and/or aquatic weed-like, and the lightweight filter material is at least one of polyurethane sponge, ceramsite, polyvinyl chloride and polypropylene copolymerized honeycomb filler and polyurethane suspension ball filler.
8. The batch type composite nitrogen and phosphorus removal sewage treatment plant according to claim 1, further comprising a pair of perforated plates in the second reaction tank, wherein edges of the pair of perforated plates are respectively attached to the side walls of the second reaction tank, the pair of perforated plates are parallel to each other, and the lightweight filter material is filled between the pair of perforated plates.
9. The sequencing batch combined nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein the nitrogen removal filler is at least one of sulfur, pyrite, zeolite, dolomite and limestone, and the phosphorus removal filler is at least one of volcanic rock, foamed iron and foamed aluminum.
10. The sequencing batch composite nitrogen and phosphorus removal sewage treatment plant of claim 1, wherein the first drainage port comprises a triangular weir and a weir trough, the triangular weir is disposed at the top of the first reaction tank, the weir trough surrounds the triangular weir, and the weir trough is communicated with the second reaction tank.
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CN202020396591.XU CN212127901U (en) | 2020-03-25 | 2020-03-25 | Sequencing batch type composite nitrogen and phosphorus removal sewage treatment device |
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CN202020396591.XU CN212127901U (en) | 2020-03-25 | 2020-03-25 | Sequencing batch type composite nitrogen and phosphorus removal sewage treatment device |
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