CN212076748U - AAO + BAF sewage treatment system - Google Patents
AAO + BAF sewage treatment system Download PDFInfo
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- CN212076748U CN212076748U CN201922335056.3U CN201922335056U CN212076748U CN 212076748 U CN212076748 U CN 212076748U CN 201922335056 U CN201922335056 U CN 201922335056U CN 212076748 U CN212076748 U CN 212076748U
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Abstract
The utility model relates to an AAO + BAF sewage treatment system, which comprises a pretreatment unit, an AAO unit and a Biological Aerated Filter (BAF) unit, wherein the pretreatment unit comprises two areas, namely a regulation area and a sludge concentration area, the regulation area is provided with a grid device, a pre-aeration device and a sewage lifting device, and the sludge concentration area is provided with a sludge lifting device and a supernatant discharge device; the AAO unit is equipped with four treatment zones, and four treatment zones are anaerobic zone, anoxic zone, good oxygen district and settling zone respectively, the utility model discloses sewage treatment efficiency, simple structure is worth promoting.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to an AAO + BAF sewage treatment system.
Background
With the increasing expansion of urban population and the continuous development of industry and agriculture, water environment pollution accidents occur frequently, and the health and even life of people and livestock are seriously harmed. Many lakes and reservoirs cause eutrophication of water bodies due to the discharge of nitrogen and phosphorus, and seriously threaten the production life and ecological balance of human beings. The sewage treatment equipment can effectively treat domestic sewage, industrial wastewater and the like in urban areas, prevents sewage and pollutants from directly flowing into water areas, and has important significance for improving ecological environment, promoting urban grade and promoting economic development. But the current sewage treatment device is low in sewage purification efficiency and poor in sewage treatment effect, and cannot meet the current higher technical requirements for sewage purification. And meanwhile, the sewage is low in recycling, so that huge waste is caused.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide an AAO + BAF sewage treatment system with good sewage treatment effect and high treatment efficiency.
An AAO + BAF sewage treatment system comprises a pretreatment unit, an AAO unit, a Biological Aerated Filter (BAF) unit and a disinfection unit, wherein the pretreatment unit is provided with two zones, namely a regulation zone and a sludge concentration zone, the regulation zone is provided with a grating device, a pre-aeration device is arranged near the grating device, one side of the regulation zone is provided with a sewage lifting device, and the sludge concentration zone is provided with a sludge lifting device and a supernatant discharge device; the grid device is provided with mechanical transmission and is used for intercepting large suspended particles and lifting the large suspended particles to the ground for removal; the pre-aeration device is provided with a perforated aeration pipe, and is used for intermittent ventilation and uniform water quality; the sewage lifting device is provided with liquid level control and lifts sewage to the anaerobic zone through the liquid level control; the supernatant discharging device is provided with a supernatant discharging port which returns the supernatant to the adjusting area in time; the sludge lifting device discharges the residual sludge; the AAO unit is provided with four treatment zones which are respectively an anaerobic zone, an anoxic zone, an aerobic zone and a precipitation zone, the anaerobic zone is provided with sludge reflux and braid-type fillers, the braid-type fillers provide attachment areas for flora in the anaerobic zone, the treatment stability is ensured, and the attached microorganisms are continuously stripped rather than intensively stripped; the anoxic zone is provided with mixed liquor backflow and elastic filler, the mixed liquor backflow is mainly used for denitrification and provides partial alkalinity for subsequent nitration reaction, and the elastic filler mainly provides an attachment area of an anoxic zone flora and ensures the growth of the anoxic zone flora in the area; the aerobic zone is provided with a first aeration device, suspended biological fillers and a dosing device, the first aeration device mainly provides sufficient dissolved oxygen for aerobic floras in the aerobic zone, the suspended biological fillers mainly provide effective attachment area for the floras in the aerobic zone, and the dosing device is favorable for carrying out nitration reaction and mainly adds ferric chloride to remove total phosphorus, can provide crystal nuclei for microorganisms at the same time, and is favorable for the generation and subsequent precipitation of the zoogloea; the sedimentation zone is provided with an inclined pipe for sedimentation, the effluent water of the aerobic zone is subjected to high-efficiency mud-water separation, and simultaneously the sludge in the sedimentation zone flows back to the anaerobic zone for phosphorus release; reducing the release of total phosphorus; the Biological Aerated Filter (BAF) is provided with a second aeration device, a filter and a back-flushing water pump, wherein the second aeration device is mainly used for flushing the Biological Aerated Filter (BAF) and providing dissolved oxygen for microorganisms, a certain amount of granular filter materials with smaller grain sizes are filled in the filter, a high-activity biological membrane grows on the surface of the filter materials, and the interior of the filter is aerated. When sewage flows through, the sewage is rapidly purified by utilizing the oxidative degradation capability of the high-concentration biological membrane brought by the high specific surface area of the filter material; meanwhile, when sewage flows through, the filter material is in a compacted state, and suspended matters in the sewage are intercepted by utilizing the characteristic of small particle size of the filter material and the biological flocculation effect of the biological membrane, and the fallen biological membrane is ensured not to float out along with the water; after a certain time of operation, back washing is carried out to release the trapped suspended matters and renew the biological membrane. The disinfection unit is provided with an ultraviolet disinfection device, and the right side of the disinfection unit is provided with an integrated monitor.
Further, the main water inlet pipe is arranged above the grating device and used for removing large suspended matters in sewage in the main water inlet pipe and preventing the water pump from being blocked.
Furthermore, the pre-aeration device is provided with a perforated aeration pipe for intermittent ventilation and uniform water quality.
Further, sewage hoisting device passes through liquid level control, supernatant discharging equipment is equipped with the supernatant discharge port, and the supernatant discharge port is in time with the supernatant reflux district.
Further, the anaerobic zone is provided with a sewage inlet pipe, the sewage inlet pipe is provided with an electric valve, a flow meter is arranged near the electric valve, and the electric valve is controlled by a PLC control system arranged near the AAO unit to open and close the electric valve.
Furthermore, the braid-type filler has the advantages of fast film hanging, continuous film release, good biological film renewal and high load impact resistance.
Furthermore, the elastic filler in the anoxic zone is elastic filler, is uniformly spread and fully distributed in all directions, bacteria in the anoxic zone are attached to and bed on each strand, good activity and space variability are kept, and a large specific surface area is obtained in the operation process, and good metabolism can be carried out.
Furthermore, the suspended biological filler mainly plays a role of a biological membrane carrier, has a function of intercepting suspended matters, and has the characteristics of strong biological adhesive force, large specific surface area, high porosity, good chemical and biological stability, durability, no harmful substances dissolved out, no secondary pollution, aging resistance, strong hydrophilic performance and the like.
Furthermore, connecting channels are arranged among the anaerobic zone, the anoxic zone, the aerobic zone and the sedimentation zone and are used for connecting the four treatment zones.
Further, the lower part of the Biological Aerated Filter (BAF) is aerated. When sewage flows through, the sewage is rapidly purified by utilizing the oxidative degradation capability of the high-concentration biological membrane brought by the high specific surface area of the filter material.
Furthermore, the second aeration device is provided with an air blower, so that the equipment is small in size, low in noise and large in air volume.
Furthermore, the ultraviolet disinfection device comprises an ultraviolet lamp tube, a high-transmittance quartz sleeve, a support, a cleaner and an equipment control system, wherein the support is an 304/316L stainless steel support, the ultraviolet lamp tube adopts ultraviolet C (254 nm), the output utilization rate of the ultraviolet lamp tube is up to more than 95%, and the disinfection reliability is high.
Further, integrative monitor includes monitoring functions such as DO, PH, liquid level, and the monitor is located the water pitcher, and the probe submerges 0.5m below the surface of water.
Compared with the prior art, the utility model has the advantages that each component unit of the utility model is integrally built in sequence, and the units share the same wall, so that the design saves investment and space, and saves operation cost; the utility model discloses the operation is high-efficient stable, the treatment effect is good, and sewage is through the processing in anaerobic zone, anoxic zone, good oxygen district, gets rid of most macromolecule organic pollutants in the sewage, and the sedimentation zone carries out mud-water separation to sewage, and aeration biological filter carries out degree of depth biochemical treatment and filtration treatment to sewage.
Drawings
FIG. 1 is a schematic structural view of a sewage treatment system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an AAO unit according to an embodiment of the present invention.
FIG. 3 is a schematic structural diagram of a Biological Aerated Filter (BAF) according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a disinfection unit according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of an ultraviolet disinfection device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and drawings.
Referring to fig. 1, 2, 3, 4 and 5, an embodiment of the present invention, an AAO + BAF sewage treatment system 10 is shown, the system includes a pretreatment unit 20, an AAO unit 21, a Biological Aerated Filter (BAF) unit 22, and a disinfection unit 48, the pretreatment unit 20 is provided with two zones, which are a conditioning zone 23 and a sludge concentration zone 24, respectively, the conditioning zone 23 is provided with a grid device 25, a pre-aeration device 26 is provided near the grid device 25, a sewage lifting device 27 is provided at one side of the conditioning zone 23, and the sludge concentration zone 24 is provided with a sludge lifting device 28 and a supernatant discharging device 29; the grating device 25 is provided with a mechanical transmission 30, and intercepts the intercepted large particle suspended matters and lifts the intercepted large particle suspended matters to the ground for removal; the pre-aeration device 26 is provided with a perforated aeration pipe 31 for intermittent ventilation and uniform water quality; the sewage lifting device 27 is provided with a liquid level control 32, and the sewage lifting device 27 controls the liquid level 32; the supernatant discharging device 29 is provided with a supernatant discharging port 33, and the supernatant discharging port 33 returns the supernatant to the adjusting area 23 in time; the sludge lifting device 27 discharges the excess sludge; the AAO unit 21 is provided with four treatment zones, the four treatment zones are an anaerobic zone 34, an anoxic zone 35, an aerobic zone 36 and a settling zone 37 respectively, the anaerobic zone 34 is provided with a sludge reflux 38 and a braid-type filler 39, the braid-type filler 39 provides an attachment area for the flora in the anaerobic zone 34, the treatment stability is ensured, and the attached microorganisms are continuously stripped rather than intensively stripped; the anoxic zone 35 is provided with a mixed liquid reflux 40 and an elastic filler 41, the mixed liquid reflux 40 is mainly used for denitrification and provides partial alkalinity for subsequent nitration reaction, and the elastic filler 41 mainly provides an attachment area of the flora in the anoxic zone 35 and ensures the growth of the flora in the anoxic zone 35; the aerobic zone 36 is provided with a first aeration device 42, a suspended biological filler 43 and a dosing device 44, the first aeration device 42 mainly provides sufficient dissolved oxygen for aerobic floras in the aerobic zone 36, the suspended biological filler 43 mainly provides an effective attachment area for the floras in the aerobic zone 36, and is beneficial to carrying out nitration reaction, and the dosing device 44 mainly adds ferric chloride to remove total phosphorus and provide nuclei for microorganisms, so that the zoogloea generation and subsequent precipitation are facilitated; the sedimentation zone 37 is provided with an inclined tube sedimentation 45 for carrying out high-efficiency mud-water separation on the effluent of the aerobic zone 36, and simultaneously, the sludge in the sedimentation zone 37 flows back to the anaerobic zone 34 for releasing phosphorus; reducing the release of total phosphorus; the Biological Aerated Filter (BAF)22 is provided with a second aeration device 46, a filter 47 and a back-flushing water pump 48, the second aeration device 46 mainly flushes the Biological Aerated Filter (BAF)22 and provides dissolved oxygen for microorganisms, a certain amount of granular filter materials with small grain diameter are filled in the filter 47, high-activity biological membranes grow on the surfaces of the filter materials, and aeration is carried out in the filter 47. When sewage flows through, the sewage is rapidly purified by utilizing the oxidative degradation capability of the high-concentration biological membrane brought by the high specific surface area of the filter material; meanwhile, when sewage flows through, the filter material is in a compacted state, and suspended matters in the sewage are intercepted by utilizing the characteristic of small particle size of the filter material and the biological flocculation effect of the biological membrane, and the fallen biological membrane is ensured not to float out along with the water; after a certain time of operation, back washing is carried out to release the trapped suspended matters and renew the biological membrane. The disinfection unit 48 is provided with an ultraviolet disinfection device 49, and the right side of the disinfection unit 48 is provided with an integrated monitor 50.
Further, as a preferred embodiment, a main water inlet pipe 51 is arranged above the grille device 25, and is used for removing large suspended matters in the sewage in the main water inlet pipe and preventing the water pump from being blocked.
Further, in the present embodiment, the pre-aeration apparatus 26 is preferably provided with a perforated aeration pipe 31 for intermittent aeration to make the water quality uniform.
Further, as a preferred embodiment, the sewage lifting device 27 is provided with a supernatant discharging port 33 through a liquid level control 32, and the supernatant discharging port 33 timely returns the supernatant to the adjusting area 23.
Further, as a preferred embodiment, the anaerobic zone 34 is provided with a sewage inlet pipe 52, the sewage inlet pipe 52 is provided with an electric valve 53, a flow meter 54 is arranged near the electric valve 53, and the electric valve 53 is controlled by a PLC control system 55 arranged near the AAO unit 21 to open and close the electric valve.
Further, as a preferable aspect of the present embodiment, the braid-type filler 39 has a high film-forming speed, a continuous film release, a good biofilm renewal, and a high load impact resistance.
Further, as a preferred embodiment, the elastic filler 41 of the anoxic zone 35 is an elastic filler, and is uniformly spread and distributed in all directions, and the anoxic bacteria zone 35 is attached to each filament, so as to maintain good activity and space variability, and obtain a large specific surface area during operation, and perform good metabolism.
Further, as a preferred embodiment of the present invention, the suspended biological filler 43 mainly functions as a carrier of a biological membrane, and also has a function of entrapping suspended matters, and has the characteristics of strong biological adhesion, large specific surface area, high porosity, good chemical and biological stability, durability, no harmful substance dissolution, no secondary pollution, aging resistance, strong hydrophilic property, and the like.
Further, as a preference of this embodiment, a connecting channel 56 is provided between the anaerobic zone 34, the anoxic zone 35, the aerobic zone 36 and the settling zone 37 for connecting the four treatment zones.
Further, as a preference of the present embodiment, the Biological Aerated Filter (BAF)22 is aerated at its lower part. When sewage flows through, the sewage is rapidly purified by utilizing the oxidative degradation capability of the high-concentration biological membrane brought by the high specific surface area of the filter material.
Further, as a preferred embodiment of the present invention, the second aeration device 46 is provided with a blower (not shown), and the apparatus has a small volume, low noise and large air volume.
Further, as a preferred embodiment, the ultraviolet disinfection device 48 includes an ultraviolet lamp 57, a high transmittance quartz sleeve 58, a bracket 59, a cleaner 60 and an equipment control system 61, the bracket 59 is an 304/316L stainless steel bracket, the ultraviolet lamp 57 uses ultraviolet C (254 nm), the output utilization rate of the ultraviolet lamp is as high as 95%, and the disinfection reliability is high.
Further, as a preferred embodiment, the integrated monitor 50 includes monitoring functions such as DO, PH, and liquid level, and is located in the water tank, and the probe is submerged 0.5m below the water surface.
The working principle is as follows: after being treated by the pretreatment unit, the sewage is sequentially treated by the anaerobic zone, the anoxic zone and the aerobic zone to remove most macromolecular organic pollutants in the sewage, the sedimentation zone is used for carrying out sludge-water separation on the sewage, and the Biological Aerated Filter (BAF) is used for carrying out advanced treatment and filtration treatment on the sewage. The ultraviolet disinfection device is used for disinfecting sewage.
It should be noted that the present invention is not limited to the above embodiments, and other changes can be made by those skilled in the art according to the spirit of the present invention, and all the changes made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. An AAO + BAF sewage treatment system comprises a pretreatment unit, an AAO unit, a Biological Aerated Filter (BAF) unit and a disinfection unit, and is characterized in that: the pretreatment unit is provided with a regulating area and a sludge concentration area, the regulating area is provided with a grating device, a pre-aeration device is arranged near the grating device, one side of the regulating area is provided with a sewage lifting device, and the sludge concentration area is provided with a sludge lifting device and a supernatant discharging device; the AAO unit is equipped with four treatment areas, four treatment areas are anaerobic zone, anoxic zone, good oxygen district and settling zone respectively, anaerobic zone is equipped with mud backward flow and braid formula and packs, the anoxic zone is equipped with mixed liquid reflux unit and elastic filler, the aerobic zone is equipped with suspension biofilm carrier, charge device and first aeration equipment, the settling zone is equipped with the pipe chute and deposits, bological aerated filter BAF is equipped with second aeration equipment, filtering pond and back flush water pump, the disinfection unit is equipped with ultraviolet ray disinfection device, the disinfection unit right side is equipped with integrative monitor.
2. The wastewater treatment system according to claim 1, wherein: the grid device top is equipped with main inlet tube, and the grid device is equipped with mechanical transmission for get rid of big suspended solid in the main inlet tube sewage, prevent to block up the water pump.
3. The wastewater treatment system according to claim 1, wherein: the pre-aeration device is provided with a perforated aeration pipe, and the water quality is uniform through intermittent ventilation.
4. The wastewater treatment system according to claim 1, wherein: the sewage lifting device is controlled by liquid level, the supernatant discharging device is provided with a supernatant discharging port, and the supernatant is timely returned to the adjusting area by the supernatant discharging port.
5. The wastewater treatment system according to claim 1, wherein: the anaerobic zone is provided with a sewage inlet pipe, the sewage inlet pipe is provided with an electric valve, and a flowmeter is arranged near the electric valve.
6. The wastewater treatment system according to claim 1, wherein: and connecting channels are arranged among the anaerobic zone, the anoxic zone, the aerobic zone and the precipitation zone and are used for connecting the four treatment zones.
7. The wastewater treatment system according to claim 1, wherein: the second aeration device is provided with a blower.
8. The wastewater treatment system according to claim 1, wherein: the ultraviolet disinfection device comprises an ultraviolet lamp tube, a high-transmittance quartz sleeve, a support, a cleaner and an equipment control system, wherein the support is an 304/316L stainless steel support.
9. The wastewater treatment system according to claim 1, wherein: the monitor comprises monitoring functions of DO, PH, liquid level and the like, is positioned in the water tank, and the probe is submerged 0.5m below the water surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922335056.3U CN212076748U (en) | 2019-12-23 | 2019-12-23 | AAO + BAF sewage treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922335056.3U CN212076748U (en) | 2019-12-23 | 2019-12-23 | AAO + BAF sewage treatment system |
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| CN212076748U true CN212076748U (en) | 2020-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116161791A (en) * | 2023-03-09 | 2023-05-26 | 云南合续环境科技股份有限公司 | Rural sewage treatment system and method powered by solar energy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116161791A (en) * | 2023-03-09 | 2023-05-26 | 云南合续环境科技股份有限公司 | Rural sewage treatment system and method powered by solar energy |
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