CN211946461U

CN211946461U - Sequencing batch type sewage biological treatment device by activated sludge process

Info

Publication number: CN211946461U
Application number: CN201921819757.8U
Authority: CN
Inventors: 柏永生; 韩军; 蔡文波; 师路远; 常江; 王佳伟; 白宇; 蒋勇
Original assignee: Beijing Drainage Group Co Ltd
Current assignee: Beijing Drainage Group Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-11-17
Anticipated expiration: 2029-10-25

Abstract

The utility model discloses a sequencing batch activated sludge process biological sewage treatment plant, include: the cavity comprises a regulating region, a sequencing batch main reaction region, a clarifying region and a clear water region, wherein the sequencing batch main reaction region is respectively connected with the regulating region and the clarifying region, and the clarifying region is also connected with the clear water region; a water inlet is formed in the side wall of the adjusting area, a water inlet gas stripping component and an adjusting weir groove are arranged in the adjusting area, and the adjusting weir groove is respectively connected with the water inlet gas stripping component and the sequencing batch main reaction area; the sequencing batch main reaction zone comprises a first reaction zone and a second reaction zone, wherein a first aeration component and a filler zone are arranged in the first reaction zone, a second aeration component, a sludge backflow gas stripping component, an inverted cone structure and an anti-surge structure are arranged in the second reaction zone, the sludge backflow gas stripping component is connected with the first reaction zone, and the anti-surge structure is connected with the clarification zone; the side wall of the clarification area is provided with a drain pipe, and a central water distributor is arranged in the clarification area. The utility model discloses effective control the mud inflation, it is effectual to go out water.

Description

Sequencing batch type sewage biological treatment device by activated sludge process

Technical Field

The utility model belongs to the environmental protection equipment field, more specifically relates to a sequencing batch activated sludge process sewage biological treatment device that area is little, simple structure, control are nimble, the energy consumption is low, go out water SS lower, be applicable to rural dispersed domestic sewage.

Background

At present, the water discharge of counties, towns and villages in China accounts for more than 50% of the total water discharge of the whole country, 96% of the villages and towns do not have water discharge channels and sewage treatment systems, the first-level sewage treatment rate of the villages and towns does not exceed 1%, a large amount of domestic sewage is discharged randomly, the pollution to surface and underground water bodies of small towns and villages is serious, and the safety of drinking water in the villages and the physical and mental health of residents are seriously threatened. The domestic water consumption of rural residents is influenced by factors such as living conditions, living habits, solar terms and the like. The general rural population lives dispersedly, the quantity is not too much, the sewage quantity produced is small, but the coefficient of variation is large, the life law of residents is similar, so the rural domestic sewage quantity is larger in the morning and at night than in the daytime, the discharge capacity at night is small, even the water is cut off, and the water quality and the water quantity fluctuate greatly. Therefore, in the rural sewage treatment process, the mode of adopting a densely populated area to intercept sewage storage pipes and building a sewage treatment plant is not suitable any more, and the distributed treatment process and the distributed treatment device which have the advantages of low investment cost and simple operation management are adopted according to local conditions and are an ideal choice.

The SBR (sequencing batch reactor) process is recommended by technical standards of rural domestic sewage treatment facilities (draft of comments). The SBR reaction tank is a main structure of the Sequencing Batch activated sludge process, and SBR is an abbreviation of Sequencing Batch activated sludge process (Sequencing Batch Reactor). Different from the traditional sewage treatment process, the SBR technology adopts an operation mode of time division to replace an operation mode of space division, an unstable biochemical reaction to replace a stable biochemical reaction, and a standing ideal precipitate to replace the traditional dynamic precipitate. The main characteristic is orderly and intermittent operation in operation, the core of SBR process is SBR reaction tank, which integrates the functions of homogenization, primary sedimentation, biodegradation, secondary sedimentation and the like in one tank without sludge reflux system. The sewage completes the processes of water inlet, reaction, precipitation, water drainage, idling and the like in one period of the SBR reaction tank, so that the sewage treatment process is greatly simplified. In an operation period, the operation time of each stage, the change of the volume of the mixed liquid in the reaction period and the operation state can be flexibly mastered according to the specific sewage property, the effluent quality, the operation function requirement and the like.

The existing SBR technology mainly realizes functions of homogenization, primary sedimentation, biodegradation and the like in the same reaction tank, the structure is easy to interfere with each other when sewage is treated in each stage, the treatment efficiency of the sewage and the effluent quality are influenced, and the used electrical equipment is more, the automatic control requirement is high, scum is easy to generate, and the like.

Therefore, aiming at the rural sewage discharge characteristics and the defects of complex automatic control of the SBR process and the like, the sewage biological treatment device which uses less electric equipment, has better effluent quality and low automatic control requirement is particularly needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sequencing batch biological sewage treatment device which has less electrical equipment, better effluent quality and low requirement of automatic control.

In order to achieve the above object, the present invention provides a sequencing batch activated sludge process biological sewage treatment device, comprising: the sequencing batch reactor comprises a cavity, a reaction chamber and a reaction chamber, wherein the cavity comprises a regulating region, a sequencing batch main reaction region, a clarifying region and a clear water region, the sequencing batch main reaction region is respectively connected with the regulating region and the clarifying region, and the clarifying region is also connected with the clear water region; a water inlet is formed in the side wall of the adjusting area, a water inlet gas stripping component and an adjusting weir groove are arranged in the adjusting area, and the adjusting weir groove is respectively connected with the water inlet gas stripping component and the sequencing batch main reaction area; the sequencing batch main reaction zone comprises a first reaction zone and a second reaction zone, wherein a first aeration component and a filler zone are arranged in the first reaction zone, a second aeration component, a sludge backflow gas stripping component, an inverted cone structure and an anti-surge structure are arranged in the second reaction zone, the sludge backflow gas stripping component is connected with the first reaction zone, and the anti-surge structure is connected with the clarification zone; the side wall of the clarification zone is provided with a drain pipe, and a central water distributor is arranged in the clarification zone.

Preferably, the water inlet gas stripping assembly comprises a first water lifting pipe and a first air inlet pipe, one end of the first water lifting pipe is connected with the adjusting weir groove, the side wall of the first water lifting pipe is connected with one end of the first air inlet pipe, and the other end of the first air inlet pipe is connected with the air blower through a first time control electric valve.

Preferably, an adjustable weir plate is arranged in the adjusting weir groove, and the adjusting weir groove is connected with the first reaction zone through a water inlet flange.

Preferably, the first aeration assembly comprises a first air diffuser aerator, a second air diffuser aerator, a third air diffuser aerator, a perforated aerator, an aeration air inlet pipe and a perforated aeration pipe; one end of the aeration air inlet pipe is respectively connected with the first air diffusing aerator, the second air diffusing aerator and the third air diffusing aerator, and the other end of the aeration air inlet pipe is connected with the air blower through a second time control electric valve; one end of the perforated aeration pipe is connected with the perforated aerator, and the other end of the perforated aeration pipe is connected with the air blower through a third time control electric valve.

Preferably, the sludge reflux gas stripping assembly comprises a second water lifting pipe and a second gas inlet pipe, one end of the second water lifting pipe is connected with the first reaction zone through a sludge reflux pipe, the side wall of the second water lifting pipe is connected with one end of the second gas inlet pipe, and the other end of the second gas inlet pipe is connected with a second time control electric valve.

Preferably, the second aeration assembly comprises a fourth air diffuser aerator, a fifth air diffuser aerator and an aeration air inlet pipe; and the fourth and fifth air diffuser aerators are connected with one end of the aeration air inlet pipe.

Preferably, the anti-surge structure is connected with the clarification zone through a water outlet flange.

Preferably, the clear water area is provided with a light filter material, a backwashing water drain pipe and a backwashing air inlet pipe, and the backwashing air inlet pipe is connected with the third time control electric valve.

Preferably, the cavity is a cuboid, and a top cover is arranged at the top of the cavity.

Preferably, partition plates are arranged between the adjusting region and the sequencing batch main reaction region, between the sequencing batch main reaction region and the clarification region, and between the clarification region and the clear water region; and a vertical partition plate is arranged between the first reaction zone and the second reaction zone.

The beneficial effects of the utility model reside in that: the utility model discloses a formula activated sludge process sewage biological treatment device is with the regulatory region to the preface formula, the formula is the main reaction zone to the preface, the clarification district, the clear water district is located in same cavity, only part through the baffle, it is simple to make whole device area less and connected mode, the energy consumption is lower, but intermittent type handles the not quantitative sewage that emits, time-space program on-off control through air stripping subassembly and aeration subassembly, realize business turn over water, the anaerobism, the alternate operation of good oxygen and oxygen elimination, form dissolved oxygen, the concentration gradient of second reaction OD5, the effective control mud inflation, it is effectual to go out water, it is especially high-efficient to going out getting rid of water SS, and adjust the detention stock pending sewage in the weir groove, then there is dilution cushioning effect to the sewage that gets into, effectively resist the impact of water yield change and organic pollutant.

The present invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.

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. Wherein like reference numerals generally refer to like parts throughout the exemplary embodiments of the present invention.

Fig. 1 is a structural connection diagram of a sequencing batch activated sludge process biological wastewater treatment apparatus according to an embodiment of the present invention.

Description of reference numerals:

1. a lift pump; 2. a water inlet pipe; 3. an overflow pipe; 4. an atmospheric valve; 5. adjusting the weir notch; 6. adjusting the weir plate; 7. partition plates; 8. a top cover; 9. a first water lifting pipe; 10. an influent gas stripping assembly; 11. A first intake pipe; 12. a water inlet flange; 13. a sludge return pipe; 14. a filler zone; 151. a first diffuser aerator; 152. a second air diffuser; 153. a third air diffuser; 154. a fourth air diffuser; 155. a fifth air diffuser; 16. an aeration air inlet pipe; 17. a perforated aerator; 18. Perforating an aeration pipe; 19. an inverted cone structure; 20. an anti-surge structure; 21. a vertical partition plate; 22. a sludge reflux gas stripping component; 23. a second intake pipe; 24. a second water lifting pipe; 25. a sludge discharge pipe; 26. backwashing the drain pipe; 27. backwashing the air inlet pipe; 28. a central water distributor; 29. a water outlet flange; 31. a drain pipe; 321. a first regulating valve; 322. a second regulating valve; 323. a third regulating valve; 33. a back-flushing valve; 34. a blower; 35. a third time-controlled electric valve; 36. a first time-controlled electrically-operated valve; 37. a second time-controlled electrically operated valve; 38 fourth regulating valve.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be 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.

According to the utility model discloses a formula activated sludge process biological sewage treatment plant is criticized to preface, include: the cavity comprises a regulating region, a sequencing batch main reaction region, a clarifying region and a clear water region, wherein the sequencing batch main reaction region is respectively connected with the regulating region and the clarifying region, and the clarifying region is also connected with the clear water region; a water inlet is formed in the side wall of the adjusting area, a water inlet gas stripping component and an adjusting weir groove are arranged in the adjusting area, and the adjusting weir groove is respectively connected with the water inlet gas stripping component and the sequencing batch main reaction area; the sequencing batch main reaction zone comprises a first reaction zone and a second reaction zone, wherein a first aeration component and a filler zone are arranged in the first reaction zone, a second aeration component, a sludge backflow gas stripping component, an inverted cone structure and an anti-surge structure are arranged in the second reaction zone, the sludge backflow gas stripping component is connected with the first reaction zone, and the anti-surge structure is connected with the clarification zone; the side wall of the clarification area is provided with a drain pipe, and a central water distributor is arranged in the clarification area.

Specifically, the inner cavity of the sequencing batch main reaction zone is divided into a first reaction zone and a second reaction zone, a water passing port is arranged at the upper part of the first reaction zone and the upper part of the second reaction zone, sewage in the second reaction zone flows into the second reaction zone from the sewage in the first reaction zone through the water passing port at the upper part of the first reaction zone and the upper part of the second reaction zone, a water inlet is arranged on the wall surface at one side of the regulating zone, the sewage is pumped into the regulating zone through a lifting pump, a water inlet air-stripping assembly is arranged in the regulating zone, the sewage enters the sequencing batch main reaction zone from the water inlet arranged at one side of the first reaction zone through the air-stripping assembly, a first aeration assembly is arranged in the first reaction zone, a second aeration assembly and a sludge backflow air-stripping assembly, a reverse cone structure and an anti-surge structure are arranged in the second reaction zone, the sewage in the second reaction zone enters the reverse cone structure from the bottom of the reverse cone structure, so that SS (suspended solids) of effluent is reduced, the anti-surge structure is arranged in the inverted cone structure, water flowing out of the anti-surge structure enters a clarification zone through an effluent flange, a central water distributor is arranged in the clarification zone, and PAC (polyaluminium chloride) is added for chemical dephosphorization and clarification. Yielding water under the clarification action and then entering a clear water area. The aeration component and the air stripping component can realize the alternate operation of water inlet, anaerobism and aerobism only by using one air blower, are convenient to install and operate, can continuously treat the entering sewage with variable quantity, effectively resist the impact of sewage quantity and organic pollutants, and lead the anaerobic and aerobic alternate treatment in the device through the time-space program control of the air stripping component and the aeration component, thereby having good purification effect, effectively controlling the expansion of activated sludge, leading the sludge to flow back to the first reaction zone through the sludge backflow air stripping component in the second reaction zone, being beneficial to the anaerobic denitrification and being more beneficial to the nitrogen and phosphorus removal.

According to an exemplary embodiment, the biological sewage treatment device with the sequencing batch activated sludge process has the advantages that the regulating area, the sequencing batch main reaction area, the clarification area and the clear water area are arranged in the same cavity and are separated only by the partition plate, so that the whole device is small in occupied area, simple in connection mode and low in energy consumption, discharged sewage with variable quantity can be treated intermittently, the alternative operation of water inlet and outlet, anaerobic, aerobic and oxygen elimination is realized through the time-space program start-stop control of the gas stripping assembly and the aeration assembly, the concentration gradient of dissolved oxygen and second reaction OD5 is formed, the sludge expansion is effectively controlled, the water outlet effect is good, the removal of the effluent SS is particularly efficient, the retained and stored sewage to be treated in the weir groove is regulated, the diluting and buffering effect is realized on the entering sewage, and the impact of water quantity change and organic pollutants is effectively resisted.

As the preferred scheme, the water inlet gas stripping assembly comprises a first water lifting pipe and a first air inlet pipe, one end of the first water lifting pipe is connected with the adjusting weir groove, the side wall of the first water lifting pipe is connected with one end of the first air inlet pipe, and the other end of the first air inlet pipe is connected with the air blower through a first time control electric valve.

Specifically, open first time-controlled electric valve and first governing valve for air-blower and first intake pipe intercommunication fill control to first intake pipe, and air and sewage carry out the gas-liquid mixture in first water lift pipe in the regulatory region, make sewage lead to the density to reduce because of sneaking into the air, form the density difference, sewage can follow first water lift pipe and rise to in adjusting the weir plate, treat that the sewage volume crosses the weir plate after reaching the take the altitude and gets into first reaction zone.

As the preferred scheme, be equipped with adjustable weir plate in the regulation weir notch, and adjust the weir notch and pass through water inlet flange and be connected with first reaction zone.

Specifically, sewage passes through the elevator pump and gets into the regulation district by the inlet tube, and in the regulation district and be equipped with the overflow pipe, the regulation district plays catchment and the effect of adjusting quality of water yield, and the stock pending sewage that is detained in the regulation district regulation weir inslot has dilution, cushioning effect to the sewage that newly gets into, can effectively resist the impact of the water yield change of intaking and organic pollutant.

Set up adjustable weir plate in adjusting the weir groove, block the dross in the sewage that promotes, treat to promote sewage and reach the take the altitude, sewage is through the flange that intakes in flowing into first reaction zone certainly. The weir plates are arranged in the adjusting weir grooves, so that the amount of sewage entering can be buffered, and the impact of the excessive amount of sewage on the subsequent second reaction zone is prevented.

Specifically, the first air diffusing aerator, the second air diffusing aerator and the third air diffusing aerator are all arranged at the bottom of the first reaction zone, the perforated aerator is positioned above the first air diffusing aerator, the second air diffusing aerator and the third air diffusing aerator, when the second time control electric valve and the fourth adjusting valve are opened, the air blower is communicated with the aeration pipe to flush air into the aeration pipe, and the aeration air inlet pipe sends the external air into the bottom of the first reaction zone through the first air diffusing aerator, the second air diffusing aerator and the third air diffusing aerator. When the third time control electric valve and the second regulating valve are opened, the blower is communicated with the perforated aeration pipe, and the air entering the perforated aeration pipe can stir the sewage in the first reaction zone to uniformly mix the sewage.

In addition, the first reaction zone is provided with a packing zone, such as suspended packing, embedded packing or fixed packing, which facilitates the degradation of organic pollutants.

As a preferred scheme, the sludge backflow gas stripping assembly comprises a second water lifting pipe and a second gas inlet pipe, one end of the second water lifting pipe is connected with the first reaction area through a sludge backflow pipe, the side wall of the second water lifting pipe is connected with one end of the second gas inlet pipe, and the other end of the second gas inlet pipe is connected with a second time control electric valve.

Specifically, when the third time control electric valve and the third adjusting valve are opened, the air blower is communicated with the second air inlet pipe to charge air into the second air inlet pipe, air and sewage containing sludge in the second reaction zone are subjected to gas-liquid mixing in the second water lifting pipe, so that the density of the sewage containing sludge is reduced due to the fact that the sewage is mixed with the air, a density difference is formed, and the sewage can flow back to the first reaction zone along the second water lifting pipe.

Preferably, the second aeration assembly comprises a fourth stream-dispersing aerator, a fifth stream-dispersing aerator and an aeration air inlet pipe; the fourth and fifth air-dispersing aerators are connected with one end of the aeration air inlet pipe.

Specifically, when the second time control electric valve and the fourth adjusting valve are opened, the air blower is communicated with the aeration pipe to flush air into the aeration pipe, and the aeration air inlet pipe sends the external air to the bottom of the second reaction zone through the four-stream-diffusing aerator and the fifth stream-diffusing aerator.

Specifically, prevent gushing the structure setting in the inside of back taper structure, be equipped with the through-hole on the lateral wall on back taper structure right side, prevent gushing the outlet pipe of structure and pass the through-hole of back taper structure right side lateral wall, be connected to the water outlet flange, be connected with clarification district through the water outlet flange.

As the preferred scheme, the clear water area is provided with a light filter material, a backwashing water drain pipe and a backwashing air inlet pipe, and the backwashing air inlet pipe is connected with a third time control electric valve.

Specifically, the light filter material arranged in the clear water area plays a vital role in degrading SS. And opening a backwashing valve, backwashing the clean water tank by a backwashing air inlet pipe, discharging the backwashing discharged water out of the device through a backwashing water discharge pipe, and closing the backwashing valve after backwashing for 30 min.

As preferred scheme, the cavity is the cuboid, and the top of cavity is equipped with the top cap.

Specifically, the device adopts regulation district, sequencing batch owner's reaction zone, clarification district, clear water district integrated construction, and the top is equipped with the portable top cap of being convenient for, is convenient for to the installation and the maintenance of device internal plant.

As a preferred scheme, partition plates are arranged between the adjusting region and the sequencing batch main reaction region, between the sequencing batch main reaction region and the clarification region and between the clarification region and the clear water region; a vertical clapboard is arranged between the first reaction area and the second reaction area.

Particularly, the first reaction area and the second reaction area are designed in the same sequencing batch main reaction area and are separated only by the vertical partition plate, so that the device has smaller floor area and simple connection mode,

examples

As shown in FIG. 1, the biological sewage treatment apparatus by the sequencing batch activated sludge process comprises: the cavity comprises a regulating region, a sequencing batch main reaction region, a clarifying region and a clear water region, wherein the sequencing batch main reaction region is respectively connected with the regulating region and the clarifying region, and the clarifying region is also connected with the clear water region; a water inlet is formed in the side wall of the adjusting area, a water inlet gas stripping assembly and an adjusting weir groove 5 are arranged in the adjusting area, and the adjusting weir groove 5 is respectively connected with the water inlet gas stripping assembly 10 and the sequencing batch main reaction area; the sequencing batch main reaction zone comprises a first reaction zone and a second reaction zone, wherein a first aeration component and a filler zone 14 are arranged in the first reaction zone, a second aeration component, a sludge backflow gas stripping component 22, an inverted cone structure 19 and an anti-surge structure 20 are arranged in the second reaction zone, the sludge backflow gas stripping component 22 is connected with the first reaction zone, and the anti-surge structure 20 is connected with the clarification zone; the side wall of the clarification zone is provided with a drain pipe 31, and the clarification zone is internally provided with a central water distributor 28.

Wherein, the air stripping subassembly 10 of intaking includes first water lifting pipe 9 and first intake pipe 11, and the one end and the regulation weir groove 5 of first water lifting pipe 9 are connected, and the lateral wall and the one end of first intake pipe 11 of first water lifting pipe 9 are connected, and the other end of first intake pipe 11 is connected with the air-blower through first time-controlled electric valve 36.

Wherein, be equipped with adjustable weir plate 6 in adjusting weir groove 5, and adjust weir groove 5 and be connected with first reaction zone through flange 12 of intaking.

Wherein the first aeration assembly comprises a first air diffuser aerator 151, a second air diffuser aerator 152, a third air diffuser aerator 153, a perforated aerator 17, an aeration air inlet pipe 16 and a perforated aeration pipe 18; one end of the aeration air inlet pipe 16 is respectively connected with the first air diffuser aerator 151, the second air diffuser aerator 152 and the third air diffuser aerator 153, and the other end is connected with the blower through the second time control electric valve 37; one end of the perforated aeration pipe 18 is connected to the perforated aerator 17, and the other end is connected to the blower via a third time-controlled electric valve 35.

The sludge reflux gas stripping assembly 22 comprises a second water lifting pipe 24 and a second gas inlet pipe 23, one end of the second water lifting pipe 24 is connected with the first reaction zone through a sludge reflux pipe 13, the side wall of the second water lifting pipe 24 is connected with one end of the second gas inlet pipe 23, and the other end of the second gas inlet pipe 23 is connected with a second time control electric valve 37.

Wherein the second aeration assembly comprises a fourth air diffuser aerator 154, a fifth air diffuser aerator 155 and an aeration air inlet pipe 16; the fourth and

fifth air diffusers

154 and 155 are each connected to one end of the aeration intake pipe 16.

Wherein the surge arresting structure 20 is connected to the clarification zone via a water outlet flange 29.

Wherein, the clean water area is provided with a light filter material, a backwashing water discharge pipe 26 and a backwashing air inlet pipe 27, and the backwashing air inlet pipe 27 is connected with a third time control electric valve 37.

Wherein, the cavity is the cuboid, and the top of cavity is equipped with the top cap.

Partition plates 7 are arranged between the adjusting region and the sequencing batch main reaction region, between the sequencing batch main reaction region and the clarification region and between the clarification region and the clear water region; a vertical partition plate 21 is arranged between the first reaction zone and the second reaction zone.

The sequencing batch activated sludge process biological sewage treatment device has the working process as follows: sewage passes through elevator pump 1 and gets into the regulatory region by inlet tube 2 in, the regulatory region still is equipped with overflow pipe 3, and the regulatory region plays catchment and the effect of adjusting the quality of water yield, and the stock pending sewage that is detained in regulatory region adjusting weir groove 5 has dilution, cushioning effect to the sewage that newly gets into, can effectively resist the impact of the water yield change of intaking and organic pollutant, and adjustable weir plate 6 then prevents the too big impact to follow-up main reaction zone of sewage volume.

The sewage treatment in the sequencing batch main reaction zone is divided into four reaction stages of water inlet and outlet, anaerobic reaction, aerobic reaction and oxygen elimination, when water is fed in and out, the air blower 34 is started, the first time-controlled electric valve 36 and the first regulating valve 321 are opened, the air of the air blower 34 enters the first air inlet pipe 11, according to the air stripping principle, the first air inlet pipe 11 continuously sends the external air into the regulating zone, the external air is mixed with the sewage in the regulating zone in the first water lifting pipe 9, the density of the sewage in the first water lifting pipe 9 is reduced due to the mixed air at the moment, density difference is formed in the water lifting pipe, the sewage rises along the first water lifting pipe 9 and enters the regulating weir groove 5, the adjustable weir plate 6 blocks floating slag in the sewage from lifting, and finally, the sewage automatically flows into the first reaction zone, and meanwhile, the discharged water is discharged from the water.

When entering the anaerobic stage, the first time-controlled electric valve 36 and the first regulating valve 321 are kept open, the third time-controlled electric valve 35 is kept open, the perforated aerator 17 is opened by the second regulating valve 322, the second air inlet pipe 23 is opened by the third regulating valve 323, the air entering the perforated aerator pipe 18 can stir the sewage in the first reaction zone to enable the sewage to be uniformly mixed, the sewage in the second reaction zone is mixed with the air entering the second air inlet pipe 23 and then rises along the second water lifting pipe 24 to flow back to the first reaction zone, the total nitrogen in the sewage in the first reaction zone is effectively degraded, and in addition, the first reaction zone is internally provided with a suspended filler, an embedded filler or a fixed filler 14, which is beneficial to the degradation of organic pollutants.

Then the aerobic phase is started, at this time, the third time control electric valve 35, the first time control electric valve 36, the second regulating valve 322 and the first regulating valve 321 are closed, the second time control electric valve 37 and the fourth regulating valve 38 open the aeration air inlet pipe 16, the aeration air inlet pipe 16 sends the external air into the bottom of the sequencing batch main reaction zone through the first diffusion aerator 151, the second diffusion aerator 152 and the first diffusion aerator 153, the opening degree of the emptying valve 4 is regulated, pollutants such as COD (chemical oxygen demand), ammonia nitrogen, total phosphorus and the like in the sewage are subjected to sufficient aerobic treatment, the sewage enters the anti-surge structure 20 at the top of the second reaction zone through the special inverted cone structure 19 of the second reaction zone, the sludge-water separation is facilitated, the effluent SS (suspended solids) is reduced, and the sludge discharge pipe 25 is arranged at the bottom of the second reaction zone, so that the residual sludge is discharged conveniently.

After the aerobic phase is finished, the aerobic phase enters an oxygen elimination phase, the first time control electric valve 36 and the first regulating valve 321 are opened, the third time control electric valve 35 and the second regulating valve 322 are opened, the fourth regulating valve 38 closes the first flow dispersing aerator 151, the second flow dispersing aerator 152 and the first flow dispersing aerator 153, aeration is stopped for oxygen elimination reaction while water is fed, denitrification is facilitated, the backwashing valve 33 opens the backwashing air inlet pipe 27 to perform backwashing on the clean water tank, water discharged by backwashing is discharged out of the device through the backwashing water discharge pipe 26, and the backwashing valve 33 is closed after backwashing for 30 min. The effluent treated in the second reaction zone enters the clarification zone through an effluent flange 29, is mixed with the input PAC through a central water distributor 28 arranged in the clarification zone to achieve the purposes of chemical phosphorus removal and clarification, then the effluent enters the clear water zone, a light filter material is arranged in the clear water zone, purified clear water is obtained through the filtering action of the light filter material, and finally the treated effluent is discharged out of the device through a drain pipe 31. After the oxygen elimination phase is finished, the device can be operated for the next operation cycle. The circulation realizes the alternate operation of water inlet and outlet, anaerobic, aerobic and oxygen elimination, forms the concentration gradient of dissolved oxygen and second reaction OD5, effectively controls the sludge expansion, has good water outlet effect, particularly high efficiency for removing the effluent SS, regulates the detention stock to-be-treated sewage in the weir groove, has the dilution buffer effect on the entering sewage, and effectively resists the water quantity change and the impact of organic pollutants.

The foregoing description of the embodiments of the invention has been presented for purposes of illustration and not limitation, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.

Claims

1. A sequencing batch activated sludge process sewage biological treatment device is characterized by comprising: the sequencing batch reactor comprises a cavity, a reaction chamber and a reaction chamber, wherein the cavity comprises a regulating region, a sequencing batch main reaction region, a clarifying region and a clear water region, the sequencing batch main reaction region is respectively connected with the regulating region and the clarifying region, and the clarifying region is also connected with the clear water region;

a water inlet is formed in the side wall of the adjusting area, a water inlet gas stripping component and an adjusting weir groove (5) are formed in the adjusting area, and the adjusting weir groove (5) is connected with the water inlet gas stripping component (10) and the sequencing batch main reaction area respectively;

the sequencing batch main reaction zone comprises a first reaction zone and a second reaction zone, wherein a first aeration component and a packing zone (14) are arranged in the first reaction zone, a second aeration component, a sludge backflow stripping component (22), an inverted cone structure (19) and an anti-surge structure (20) are arranged in the second reaction zone, the sludge backflow stripping component (22) is connected with the first reaction zone, and the anti-surge structure (20) is connected with the clarification zone;

the side wall of the clarification zone is provided with a drain pipe (31), and the clarification zone is internally provided with a central water distributor (28).

2. The biological sewage treatment plant by the sequencing batch activated sludge process according to claim 1, wherein the water inlet stripping assembly (10) comprises a first water lifting pipe (9) and a first air inlet pipe (11), one end of the first water lifting pipe (9) is connected with the regulating weir trough (5), the side wall of the first water lifting pipe (9) is connected with one end of the first air inlet pipe (11), and the other end of the first air inlet pipe (11) is connected with a blower through a first time-controlled electric valve (36).

3. The biological sewage treatment plant according to the sequencing batch activated sludge process of claim 2, wherein an adjustable weir plate (6) is arranged in the adjusting weir notch (5), and the adjusting weir notch (5) is connected with the first reaction zone through a water inlet flange (12).

4. The biological sewage treatment apparatus according to the sequencing batch activated sludge process of claim 1, wherein the first aeration unit comprises a first aeration aerator (151), a second aeration aerator (152), a third aeration aerator (153), a perforated aerator (17), an aeration intake pipe (16), and a perforated aeration pipe (18); one end of the aeration air inlet pipe (16) is respectively connected with the first air diffusing aerator (151), the second air diffusing aerator (152) and the third air diffusing aerator (153), and the other end of the aeration air inlet pipe is connected with the air blower through a second time control electric valve (37); one end of the perforated aeration pipe (18) is connected with the perforated aerator (17), and the other end is connected with the blower through a third time control electric valve (35).

5. The biological sewage treatment plant by the sequencing batch activated sludge process according to claim 1, wherein the sludge reflux gas stripping assembly (22) comprises a second water lifting pipe (24) and a second air inlet pipe (23), one end of the second water lifting pipe (24) is connected with the first reaction zone through a sludge reflux pipe (13), the side wall of the second water lifting pipe (24) is connected with one end of the second air inlet pipe (23), and the other end of the second air inlet pipe (23) is connected with a second time control electric valve (37).

6. The biological wastewater treatment plant according to the sequencing batch activated sludge process of claim 1, wherein the second aeration module comprises a fourth aeration aerator (154), a fifth aeration aerator (155), and an aeration air inlet pipe (16); the fourth diffusion aerator (154) and the fifth diffusion aerator (155) are both connected with one end of the aeration air inlet pipe (16).

7. The sequencing batch activated sludge process biological wastewater treatment plant of claim 1 wherein the anti-surge structure (20) is connected to the clarification zone by a water outlet flange (29).

8. The sequencing batch activated sludge process biological sewage treatment plant according to claim 4, wherein the clear water zone is provided with a light weight filter material, a backwash drain pipe (26) and a backwash inlet pipe (27), and the backwash inlet pipe (27) is connected with the second time-controlled electric valve (37).

9. The apparatus of claim 1, wherein the chamber is a rectangular parallelepiped and a top cover is disposed on the top of the chamber.

10. The biological sewage treatment plant according to the sequencing batch activated sludge process of claim 1, wherein a partition plate (7) is arranged between the regulation zone and the sequencing batch main reaction zone, between the sequencing batch main reaction zone and the clarification zone, and between the clarification zone and the clear water zone; a vertical clapboard (21) is arranged between the first reaction zone and the second reaction zone.