CN220845752U - Vertical flow type AO sewage treatment device - Google Patents
Vertical flow type AO sewage treatment device Download PDFInfo
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- CN220845752U CN220845752U CN202322665849.8U CN202322665849U CN220845752U CN 220845752 U CN220845752 U CN 220845752U CN 202322665849 U CN202322665849 U CN 202322665849U CN 220845752 U CN220845752 U CN 220845752U
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- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model relates to the technical field of sewage treatment equipment, in particular to a vertical flow type AO sewage treatment device, which comprises: the anaerobic treatment device comprises a tank body, wherein the inside of the tank body is sequentially provided with an anaerobic zone, a facultative zone and an aerobic zone from bottom to top, activated sludge is filled in the tank body, and an anaerobic filler layer and an aerobic filler layer are respectively filled in the anaerobic zone and the aerobic zone; the water distributor is arranged at the bottom of the tank body and is used for guiding sewage into the anaerobic zone; the cyclone aeration device is arranged between the facultative zone and the aerobic zone and is connected with external air supply equipment through an air inlet; and the water outlet is arranged at the top of the tank body. The vertical flow type AO sewage treatment device integrates anaerobic, facultative and aerobic processes in the same tank body, and has no obvious distinction and limitation between each process, thereby skillfully utilizing the principle of mechanics to form a circulation system of the whole system. The device has strong adaptability, small occupied area, high treatment efficiency, strong impact resistance and large load capacity.
Description
Technical Field
The utility model relates to the technical field of sewage treatment equipment, in particular to a vertical flow type AO sewage treatment device.
Background
At present, the conventional AAO process is that anaerobic, facultative and aerobic processes are all in different tanks or tanks, for example, the prior art CN112960774A discloses a sewage treatment system, which comprises an adjusting tank, an anaerobic tank, a facultative tank, an aerobic tank and a sedimentation tank which are sequentially connected through a water conveying pipeline, corresponding fillers are arranged in the anaerobic tank, the facultative tank and the aerobic tank, an inlet of the water conveying pipeline among the anaerobic tank, the facultative tank and the aerobic tank is positioned at the top of the tail end of the front tank, and an outlet is positioned at the lower part of the front end of the rear tank. Thus, each process unit is relatively independent, and a plurality of pipelines are connected in the middle to finish the reflux and recycling of sludge in the whole process; the sewage is also subjected to anaerobic-to-aerobic-to-anaerobic process to complete the nutrient substances and denitrification in the whole sewage, each process step needs a power pump to transfer materials, and the individual denitrification process is also connected with a nitrification-denitrification process in series after the anaerobic reactor, so that the partition is relatively clear, the oxygen utilization rate is improved, but the process is complex, and the defects of high energy consumption, high carbon source requirement, weak impact load resistance and the like exist. Along with the proposal of a new denitrification path, the novel denitrification process has the advantages of saving O 2 and organic COD, having simple process flow, high load removal rate and the like, but has certain difficulty in the process of coupling anaerobic ammoxidation and methanation denitrification in one reactor.
To solve these problems, the prior art has begun to develop a sewage treatment apparatus integrating aerobic, facultative and anaerobic, for example CN 210825614U discloses a precipitation-integrated multistage circulation reactor which forms aerobic, facultative, anaerobic different functional areas in an integrated device by fan aeration, enhances the functions between the areas by physical separation, and completes the removal of organic matter and pollutants by specific biological flora when sewage flows through each area. Because the multistage circulating reactor has all aerobic and facultative anaerobic sludge (biological thallus) deposited at the bottom, the path is longer and the flow speed is high, so that the biological thallus is not easy to grow, and the treatment process of the activated sludge method is not suitable and only the contact oxidation process with filler is satisfied. In addition, the reflux of the digestive juice cannot be controlled randomly, so that the operation mode is single in the actual treatment process, the requirements on the actual water inflow and the water quality are high, the digestive juice is stable, and the treatment capacity on the water body of the changed water quality is weak.
Disclosure of Invention
The utility model aims to provide a vertical flow type AO sewage treatment device, which aims to solve the problems in the background technology.
In order to achieve the above object, an aspect of the present utility model provides the following technical solutions:
a vertical flow AO sewage treatment device comprising:
The anaerobic treatment device comprises a tank body, wherein the inside of the tank body is sequentially provided with an anaerobic zone, a facultative zone and an aerobic zone from bottom to top, activated sludge is filled in the tank body, and an anaerobic filler layer and an aerobic filler layer are respectively filled in the anaerobic zone and the aerobic zone;
the water distributor is arranged at the bottom of the tank body and is used for guiding sewage into the anaerobic zone; the water distributor is provided with an annular water inlet pipeline, a plurality of first water inlets are uniformly distributed on the inner ring of the annular water inlet pipeline, the water outlet directions of the first water inlets and the annular water inlet pipeline form an included angle of 45 degrees, a plurality of second water inlets are uniformly distributed on the top of the annular water inlet pipeline, and the water outlet directions of the second water inlets are vertically upward;
The cyclone aeration device is arranged between the facultative zone and the aerobic zone and is connected with external air supply equipment through an air inlet;
the water outlet is arranged at the top of the tank body;
The anaerobic filler layer is attached with a biomembrane with anaerobic ammonia oxidizing bacteria, anaerobic methanation bacteria and denitrifying bacteria, the aerobic filler layer is attached with a biomembrane with aerobic ammonia oxidizing bacteria and nitrifying bacteria, the activated sludge contains biological flora, and the biological flora is a facultative flora which is mutually restricted and interdependent and is formed by three flora of anaerobic ammonia oxidizing bacteria, nitrifying bacteria, denitrifying bacteria and bacillus.
Preferably, the aerobic zone is provided with an annular partition plate, a sludge sedimentation zone is arranged between the annular partition plate and the inner wall of the tank body, and a flow passage is arranged at the top of the annular partition plate.
Preferably, a baffle is arranged on the outer side of the annular baffle, and the middle part of the tank body is narrowed to form a sludge backflow seam with the annular baffle.
Preferably, a first annular water collecting tank is arranged at the top of the sludge settling zone, and the first annular water collecting tank is communicated with the water outlet.
Preferably, a denitrification region is arranged on the outer side of the tank body, a denitrification region water inlet is arranged on one side of the denitrification region, and the water outlet is communicated with the denitrification region water inlet through a flow guide pipe.
Preferably, the denitrification region is filled with an autotrophic denitrification filter layer, the top of the denitrification region is provided with a second annular water collecting tank, and the second annular water collecting tank is communicated with a water outlet.
Preferably, a mud pipe is further arranged at the bottom of the tank body, and the mud pipe extends into the tank body and is provided with a plurality of branch pipes.
Preferably, the bottom of the tank body is also provided with an emptying pipe.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The vertical flow type AO sewage treatment device provided by the embodiment of the utility model integrates anaerobic, facultative and aerobic processes into the same tank body, activated sludge is filled in the tank body, and the activated sludge contains biological flora, and three different types of flora of anaerobic ammonia oxidizing bacteria, nitrifying bacteria, denitrifying bacteria and bacillus are combined into a facultative flora which is mutually restricted and interdependent, namely aerobic metabolism can be performed in an aerobic environment, death can not occur in an anaerobic environment, digestion, metabolism and synergistic coupling effect of the anaerobic ammonia oxidizing bacteria, nitrifying bacteria, denitrifying bacteria and bacillus in an anoxic environment can be completed, and COD and nutrient nitrogen components can be removed. In addition, a sawtooth-shaped weir is arranged at the junction area of the upper part of the aerobic zone and the first annular water collecting tank, a mud-water mixture containing biological thalli enters a sedimentation zone from the sawtooth-shaped weir, so that mud-water separation, strain and water separation are achieved, the thalli and the sludge enter the facultative zone again by gravity, and the whole cycle can be completed in the system.
(2) According to the vertical flow type AO sewage treatment device provided by the embodiment of the utility model, sewage enters a tank body from the bottom of a vertical flow type AO system through a distributed water distributor, enters an anaerobic zone for microcirculation, enters a facultative zone along with the rising of the water level, and enters anaerobic again under the action of gravity in the facultative zone, part of sludge and sewage escape and enter an aerobic zone through the suction of cyclone aeration, the cyclone aeration in the aerobic zone generates vortex which flows up and down, and part of sludge and sewage escape to a lower facultative zone under the action of gravity, so that the whole large internal circulation is completed. The device combines the mechanical effects of gravity, gas lift, suction and the like through a more concise process in a unified structure, skillfully utilizes the strong thrust and suction generated by rotational flow aeration, completes the exchange and conversion of sewage, sludge and biological thalli in three different environments in anaerobic, facultative and aerobic areas, and simultaneously ensures the self-circulation of the sewage, the sludge and the biological thalli in each area, thereby avoiding an internal reflux pump and reducing the energy consumption and the equipment investment.
(3) The vertical flow type AO sewage treatment device provided by the embodiment of the utility model is provided with a special water distributor, wherein the water distributor is used for guiding sewage into the anaerobic zone; the water distributor is provided with an annular water inlet pipeline, a plurality of first water inlets are uniformly distributed on the inner ring of the annular water inlet pipeline, the water outlet direction of the first water inlets and the annular water inlet pipeline form an included angle of 45 degrees, and when sewage is sprayed from the water outlet, horizontal rotational flow is formed in the horizontal direction; a plurality of second water inlets are uniformly distributed at the top of the annular water inlet pipeline, and the water outlet directions of the second water inlets are vertically upward; the sewage is sprayed out vertically upwards from the water outlet, so that the dynamic balance of the anaerobic area can be effectively maintained.
(4) According to the vertical flow type AO sewage treatment device provided by the embodiment of the utility model, anaerobic, facultative and aerobic processes are concentrated in the same tank body, no obvious distinction and limitation are reserved between each process, the anaerobic, facultative and aerobic processes are completed through a centrally arranged rotational flow aeration device, and ammoxidation, methanation and denitrification are organically coupled in different areas of one tank body. Meanwhile, the whole tank body runs at a high speed in the system through the biological thalli, so that the sewage treatment capacity is improved, the immobilized biological enzyme technology and the unpowered internal circulation technology are combined based on the technology, the energy utilization rate and the contact efficiency of the strain and the sewage are improved, and the volume load of the biochemical device is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a vertical flow AO wastewater treatment device according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an upper circulation system and a lower circulation system in a vertical flow AO wastewater treatment device according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a water distributor of a vertical-flow AO sewage treatment device according to an embodiment of the present utility model.
In the figure: 1. a tank body; 2. a water distributor; 3. a rotational flow aeration device; 4. an air inlet; 5. a water outlet; 6. an annular partition plate; 7. a flow-through port; 8. a baffle; 9. a sludge backflow joint; 10. a first annular water collection sump; 11. a water inlet of the denitrification area; 12. a flow guiding pipe; 13. a second annular water collection sump; 14. a water outlet; 15. a mud pipe; 16. an evacuation tube; 17. autotrophic denitrification filter.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Fig. 1 is a schematic structural diagram of a vertical flow AO sewage treatment apparatus according to an embodiment of the present utility model, and fig. 2 is a schematic diagram of an upper circulation system and a lower circulation system in a vertical flow AO sewage treatment apparatus according to an embodiment of the present utility model. The embodiment of the present utility model provides a vertical flow AO sewage treatment apparatus, as shown in fig. 1 or fig. 2, which includes:
The anaerobic treatment device comprises a tank body, wherein the inside of the tank body is sequentially provided with an anaerobic zone, a facultative zone and an aerobic zone from bottom to top, activated sludge is filled in the tank body, and an anaerobic filler layer and an aerobic filler layer are respectively filled in the anaerobic zone and the aerobic zone;
The water distributor 2 is arranged at the bottom of the tank body 1, and the water distributor 2 is used for guiding sewage into the anaerobic zone; the water distributor 2 is provided with an annular water inlet pipeline, a plurality of first water inlets are uniformly distributed on the inner ring of the annular water inlet pipeline, the water outlet directions of the first water inlets and the annular water inlet pipeline form an included angle of 45 degrees, a plurality of second water inlets are uniformly distributed on the top of the annular water inlet pipeline, and the water outlet directions of the second water inlets are vertically upward;
The cyclone aeration device 3 is arranged between the facultative zone and the aerobic zone, and the cyclone aeration device 3 is connected with external air supply equipment through an air inlet 4;
The water outlet 5 is arranged at the top of the tank body 1;
the anaerobic filler layer is attached with a biological film with anaerobic ammonia oxidizing bacteria, anaerobic methanation bacteria and denitrifying bacteria, and the aerobic filler layer is attached with a biological film with aerobic ammonia oxidizing bacteria and nitrifying bacteria.
The activated sludge contains biological flora, and the biological flora combines three different types of flora, anammox bacteria, nitrifying bacteria, denitrifying bacteria and bacillus into a facultative flora which are mutually restricted and interdependent, so that the facultative flora can be subjected to aerobic metabolism in an aerobic environment, can not die in an anaerobic environment, can complete digestion, metabolism and synergistic coupling of the flora in an anoxic environment, has stronger biological metabolism activity, and has water activity of 0.02-0.47. The three bacterial groups are interdependent and mutually inhibited, and the advantages are mutually transformed under different environmental conditions when the bacterial groups are contacted with organic matters, so that a biological system with strong adaptability of bacterial bodies, impact resistance and high load resistance and high-efficiency degradation is formed, and rising of sludge and exceeding of suspended matters caused by overgrowth of bacterial bodies are avoided. The characteristics and the functions of the biological thalli can be fully exerted, the facultative bacteria are propagated in a large quantity, the bacteria adaptability is strong, the digestion, metabolism and synergistic coupling effect of the bacteria under the anoxic environment can be completed, and COD and nutrient nitrogen components are removed.
Fig. 3 is a schematic diagram of an upper circulation system and a lower circulation system in a vertical flow AO sewage treatment device according to an embodiment of the present utility model. As shown in fig. 3, in one embodiment of the present utility model, the water distributor 2 of the vertical flow AO sewage treatment apparatus has an annular water inlet pipe, the inner ring of the annular water inlet pipe is uniformly distributed with a plurality of first water inlets, the water outlet directions of the plurality of first water inlets and the annular water inlet pipe have an included angle of 45 °, the top of the annular water inlet pipe is also uniformly distributed with a plurality of second water inlets, and the water outlet directions of the plurality of second water inlets are vertically upward.
The sewage enters the tank body 1 through the water distributor 2 at the bottom of the tank body 1, and because the water distribution angle is 45 degrees, horizontal rotational flow can be formed in the horizontal direction when the sewage is sprayed out from the water outlet, the water outlet direction of the second water inlet uniformly distributed at the top of the annular water inlet pipeline is vertically upward, the sewage can be sprayed out from the water outlet vertically upward, and the power balance of the anaerobic region can be effectively maintained. The activated sludge or the biological thalli in the anaerobic zone are accumulated in the rotational flow due to heavier self and centrifugal force generated by vortex, so that the sedimentation of the activated sludge and the biological thalli in the anaerobic zone at the bottom of the tank body 1 is avoided, when the rising thrust is smaller than the gravity of the biological thalli when the rising thrust is higher than a certain height, the sludge and the biological thalli start to settle, so that the biological thalli are gradually separated from water, supernatant fluid enters the facultative zone and the aerobic zone for further treatment, and the biological thalli in the activated sludge and the anaerobic zone settle downwards, thereby forming a lower circulation system taking the water distributor 2 as power.
The cyclone aeration device 3 is arranged above the interface between the facultative zone and the aerobic zone, when gas enters the cyclone aeration device 3 from the gas inlet 4, the air flow can push the blades in the cyclone aeration device 3 to rotate at high speed, the rotating blades generate upward pushing force with the same air flow direction, so that a low-pressure zone is formed below the cyclone aeration device 3, sewage can be sucked from the bottom of the cyclone aeration device 3 due to the action of pressure and upward pushing force and enter the air in the cyclone aeration device 3 to be mixed, and then the high-speed rotating blades are sent into the uppermost shearing tool bit of the cyclone aeration device 3, the shearing tool bit can shear the entering substances layer by layer, so that bubbles become finer and finer, the rising speed of the bubbles is reduced, the suspension time of the bubbles in the water body and the efficiency of dissolved oxygen are increased, and the oxygen molecules in the gas are fully utilized by sludge and biological bacteria in the water body are guaranteed, and the aerobic process is completed. The airflow moves to the water surface along with the air pressure after rising, and the speed is slowly slowed down, at the moment, the activated sludge and the biological thalli in the water body can start sinking under the action of gravity, so that an upper circulation system taking the rotational flow aeration device 3 as power is formed.
By designing the upper circulation system and the lower circulation system, the micro-circulation generated by the two power sources of which the anaerobic and the aerobic limit are mutually fused is under the influence of each other to form a large circulation system, so that the reflux of the sludge and the sewage is realized by the impact force generated by the power generated by the water inlet of the water distributor 2 and the cyclone aeration device 3 and the pressure difference, the reflux of the aerobic sludge, the reflux of the anaerobic sludge and the circulating flow of the sewage in the whole system are finished without additional power.
The processing device combines the mechanics theory of gravity, gas lift, suction and the like through a more concise process in a unified structure, skillfully utilizes the strong thrust and suction generated by rotational flow aeration, completes the exchange and conversion of sewage, sludge and biological thalli in three different environments in anaerobic, facultative and aerobic areas, and simultaneously ensures the self circulation of the sewage, the sludge and the biological thalli in each area. Sewage enters the tank body from the bottom of the vertical flow type AO system through the distributed water distributor, enters the anaerobic zone for microcirculation, enters the facultative zone along with the rising of the water level, and enters the anaerobic zone again due to the action of gravity, and enters the aerobic zone through the suction of cyclone aeration in a part of escape, the cyclone aeration in the aerobic zone generates vortex flowing up and down, and part of the cyclone aeration in the aerobic zone escapes to the lower facultative zone under the action of gravity, so that the whole large internal circulation is completed, an internal reflux pump is not needed, and the energy consumption and the equipment investment are reduced.
In addition, the position of the rotational flow aeration device 3 can adjust the space sizes of the anaerobic zone, the facultative zone and the aerobic zone of the vertical flow type AO sewage treatment device according to the water quality and the water quantity of sewage so as to meet the residence time of the sewage in each zone, and enable biological bacteria to fully digest, remove and transform organic matters in the sewage and maintain the self-propagation of the biological bacteria.
Further, the digestion liquid of the internal circulation can be regulated by acting force, namely, the water quality pollutant is higher, the water inlet pressure and the cyclone explosive gas quantity can be reduced, the internal circulation quantity is increased, the external circulation rate is reduced, and the residence time of the water body in different areas is improved to meet the requirement of the water quality of the discharged water; conversely, if the water quantity is larger and the load is lower, the water pressure and the air quantity can be improved to accelerate the circulation efficiency and improve the treatment speed. In addition, the autotrophic denitrification filter layer arranged on the outer layer of the lower part of the tank body of the vertical-flow AO sewage treatment device can further guarantee and improve the quality of effluent.
The utility model can control the parameters of dissolved oxygen, oxidation-reduction potential, nitrifying liquid reflux ratio and the like, wherein the dissolved oxygen is controlled to be 2-3 mg/L, the nitrifying liquid reflux ratio is controlled to be 100-300%, ammonia nitrogen and nitrite nitrogen can reach a certain value, ammonia oxidation, short-cut nitrification and denitrification can be synchronously realized, firstly, autotrophic denitrification is carried out under the condition of limiting oxygen by aerobic ammonia oxidizing bacteria, and secondly, anaerobic ammonia oxidation denitrification is carried out on ammonia and nitrite under the condition of anaerobic ammonia oxidizing bacteria. Through the technical scheme, the three are coupled in a micro-ecological system for regulation and catalysis, decarburization and nitrogen can be realized simultaneously, the energy consumption of aeration in the aerobic process is saved, and the treatment efficiency is high.
As shown in fig. 1 and fig. 2, in one embodiment of the present utility model, an annular partition plate 6 is disposed in an aerobic zone of the vertical flow type AO sewage treatment apparatus, a sludge precipitation zone is disposed between the annular partition plate 6 and an inner wall of the tank 1, and a through-flow port 7 is disposed at the top of the annular partition plate 6.
Further, a baffle plate 8 is arranged on the outer side of an annular baffle plate 6 of the vertical flow type AO sewage treatment device, and a sludge backflow seam 9 is formed by the middle narrowing of the tank body 1 and the annular baffle plate 6.
Through the technical scheme, the mud-water mixture in the aerobic zone continuously rises and flows into the sludge sedimentation zone through the overflow port 7, the sludge sedimentation zone is a relatively static zone, the mud-water mixture is sunk in the zone of the sludge sedimentation zone due to the self weight of the sludge, the purpose of mud-water separation is achieved, the sludge flows back to the tank body 1 from the sludge backflow joint 9 for continuous circulation, and the supernatant flows upwards. The baffle plate 8 can prevent the mud-water mixture from splashing when passing through the overflow port 7, and promote the mud-water mixture to flow downwards along the annular baffle plate 6, so that the mud sedimentation area is kept in a relatively static state.
In one embodiment of the present utility model, as shown in fig. 1 and 2, the top of the sludge settling zone of the vertical flow AO sewage treatment device is provided with a first annular water collection tank 10, the first annular water collection tank 10 being in communication with the water outlet 5. Supernatant fluid of the sludge settling zone flows out of the water outlet 5 through the first annular water collecting tank 10.
As shown in fig. 1 and 2, in one embodiment of the present utility model, a denitrification region is disposed on the outer side of a tank body 1 of the vertical flow type AO sewage treatment apparatus, a denitrification region water inlet 11 is disposed on one side of the denitrification region, and a water outlet 5 is communicated with the denitrification region water inlet 11 through a flow guide pipe 12.
Further, the denitrification region is filled with an autotrophic denitrification filter layer 17, the top of the denitrification region is provided with a second annular water collecting tank 13, and the second annular water collecting tank 13 is communicated with a water outlet 14.
The autotrophic denitrification filter layer 17 is internally provided with denitrifying bacteria, supernatant fluid flows out from the water outlet 5 to enter the denitrification region through the water inlet 11 of the denitrification region, slowly rises from the bottom to fully contact with the denitrifying bacteria on the sulfur autotrophic denitrification filter material to carry out deep denitrification, and finally overflows from the water outlet 14 through the second annular water collecting tank 13.
As shown in fig. 1 and 2, in one embodiment of the present utility model, a sludge discharge pipe 15 is provided at the bottom of a tank 1 of the vertical flow AO sewage treatment apparatus, and the sludge discharge pipe 15 extends into the tank 1 and has a plurality of branch pipes. After the sewage treatment is stably operated for a period of time, sludge is gradually deposited to the bottom of the tank body 1, and the deposited sludge is discharged through the sludge discharge pipe 15 to complete periodic cleaning.
As shown in fig. 1 and 2, in one embodiment of the present utility model, the bottom of the tank 1 of the vertical flow AO sewage treatment apparatus is provided with an emptying pipe 16, and the emptying pipe 16 is used for discharging the residual sewage of the tank 1.
The embodiment of the utility model also provides a specific process of the vertical flow type AO sewage treatment device, which comprises the following steps:
Sewage enters the tank body 1 through the water distributor 2 at the bottom of the tank body 1, and as the water inlet direction of the first water inlets is 45 degrees, vortex can be formed on the horizontal plane, and meanwhile, the sewage is sprayed out vertically upwards from the second water inlets. The biological thalli in the sludge or the anaerobic zone are accumulated in the rotational flow due to heavier self and the centrifugal force generated by vortex, so that the biological thalli in the sludge and the anaerobic zone are prevented from being deposited at the bottom of the tank body 1, and when the rising thrust is smaller than the gravity of the biological thalli in the sludge and the anaerobic zone when the rising thrust is raised to a certain height, the sludge and the biological thalli start to settle, so that the biological thalli in the sludge and the anaerobic zone are gradually separated from water, and the supernatant fluid upwards enters the facultative zone and the aerobic zone for further treatment. Anaerobic flora has the functions of producing acetic acid, hydrogen and methane by bacillus such as hydrolytic fermentation flora, anaerobic ammoxidation bacteria and the like, and under the anaerobic environment, macromolecular organic matters are mainly decomposed into micromolecular matters so as to ensure that the rear-end facultative and aerobic microorganisms better utilize the micromolecular matters to promote the growth of the anaerobic flora and aerobic microorganisms, generate active proteins to reduce the content of pollutants in water, and decompose fat, cellulose lignans and macromolecular matters into fatty acids, proteins, amino acids and sugar. In addition, the anaerobic ammonia oxidation flora can also nitrate-de-nitrate ammonia nitrogen in water to generate acetic acid, hydrogen and carbon dioxide. In the facultative zone, nitrogen-containing organic matters (such as protein, ammonia nitrogen and nitrate nitrogen) convert ammonia nitrogen in water into nitrogen, nitrite and nitrate (namely nitrate nitrogen) by utilizing the combined action of anaerobic heterotrophic microorganism nitrifying bacteria and denitrifying bacteria, and the denitrifying bacteria generate nitrogen under the combined action of an anoxic environment (facultative zone) and part of non-digested ammonia nitrogen so as to overflow from the water body.
When gas enters the cyclone aeration device 3 from the air inlet 4, the air flow can push the blades inside the cyclone aeration device 3 to rotate at a high speed, the rotating blades generate upward pushing force with the same air flow direction, so that a low-pressure area is formed below the cyclone aeration device 3, sewage can be sucked from the bottom of the cyclone aeration device 3 due to the action of pressure and upward pushing force and enter air in the cyclone aeration device 3 to be mixed, then the high-speed rotating blades are sent into the uppermost shearing tool bit of the cyclone aeration device 3, and the shearing tool bit can shear the entered substances layer by layer, so that bubbles become finer and finer, and oxygen molecules in the gas are fully utilized by sludge and biological bacteria in a water body, and an aerobic process is completed. Aerobic biota is a huge bacterial system, anaerobic ammoxidation bacteria, nitrifying bacteria, denitrifying bacteria, bacillus and other facultative bacteria have metabolites and living modes, namely energy metabolism ways which are greatly different in an anaerobic environment, a large amount of algae, protozoa and metazoan can be generated in an aerobic biota group, the organisms take bacteria and micromolecular nutrients as special proteins and substances secreted by eating and are used by the aerobic biota group, autotrophic and heterotrophic life orientations are generated, and inorganic substances (CO 2、HCO3 -、NO3-、PO4 3- and the like), organic carbon sources and nitrogen sources (sugar, ammonia nitrogen, nitrate nitrogen and the like) are respectively utilized for synthesis into cell substances, and are converted into inorganic substances such as CO 2、H2O、NO3 -、CH4、NH3 and the like, so that energy is released. The special physical structure in the vertical flow type AO sewage treatment device greatly enriches facultative autotrophic bacteria and heterotrophic bacteria of ammonia oxidizing bacteria, anaerobic methanation bacteria and denitrifying bacteria, and particularly has the advantages that the huge autotrophic bacteria become dominant bacteria in different areas to absorb nutrient substances from sewage, and the purpose of efficiently removing pollutants in water is achieved by synthesizing own cells and discharging waste through complex biochemical reactions.
The air flow moves to the water surface along with the air pressure after rising, and the speed is slowly slowed down, and at the moment, biological thalli in the sludge and the water body begin to sink under the action of gravity; the mud-water mixture in the aerobic zone continuously rises and flows into the sludge precipitation zone through the through-flow opening 7. The sludge sedimentation zone is a relatively static zone, the sludge-water mixture sinks in the zone of the sludge sedimentation zone due to the dead weight of the sludge, the purpose of sludge-water separation is achieved, the sludge flows back to the tank body 1 from the sludge backflow joint 14 for continuous circulation, and the supernatant flows upwards; supernatant fluid flows out from the water outlet 5, enters the denitrification region through the water inlet 11 of the denitrification region, slowly rises from the bottom, fully contacts with denitrifying bacteria on the autotrophic denitrification filter layer 17 to perform deep denitrification, and finally overflows from the water outlet 14 through the second annular water collecting tank 13.
According to the vertical flow type AO sewage treatment device, anaerobic, facultative and aerobic processes are concentrated in the same tank body, no obvious distinction and limitation are reserved between each process, the anaerobic, facultative and aerobic processes are completed through a centrally arranged rotational flow aeration device, and ammoxidation, methanation and denitrification are organically coupled in different areas of the tank body. The activated sludge containing biological strains flows from bottom to top in three areas, and enters respective microcirculation systems under the condition that the self gravity is larger than the external force in the flowing process, and anaerobic, facultative and aerobic functional areas are formed under the dominant microorganism population. Of course, the anaerobic zone and the aerobic zone may be respectively filled with an anaerobic filler layer and an aerobic filler layer to enhance the effect of each functional zone. The water distributor arranged at the bottom of the tank body adopts special water distribution for guiding sewage into the anaerobic zone, ensures that the active sludge in the sewage gradually swirls and flows up along with the water flow, and forms vortex respectively in the horizontal direction and the vertical direction so as to avoid sinking; the cyclone aeration device is connected with external air supply equipment through an air inlet, provides sufficient oxygen for the aerobic zone, provides power for the whole system, and forms three special zones of an anaerobic zone, a facultative zone and an aerobic zone in a layered manner under the balance of gravity; based on the combination of the immobilized biological enzyme technology and the unpowered internal circulation technology, the energy utilization rate and the contact efficiency of the strain and sewage are improved, and the volume load of the biochemical device is greatly improved. The water outlet is arranged at the top of the tank body, and mud-water separation (thallus and water separation) is realized through natural sedimentation; the supernatant flows to the bottom of the tank body, passes through the autotrophic denitrification filter layer 17 at the outer ring of the bottom, carries out deep denitrification, and is discharged from the middle part of the tank body.
The device has strong adaptability, small occupied area, high treatment efficiency, strong impact resistance and large load capacity. The integrated water treatment system is suitable for places with high occupied requirements, such as small and medium-sized domestic sewage, rural sewage, cultivation wastewater and industrial sewage, and has strict discharge indexes, can improve the standard improvement of low-pollution water quality of surface water, rivers, lakes and the like, has low operation cost, does not need manual operation, and saves energy and reduces consumption.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A vertical flow AO sewage treatment device, comprising:
the anaerobic treatment device comprises a tank body (1), wherein an anaerobic zone, a facultative zone and an aerobic zone are sequentially arranged in the tank body (1) from bottom to top, activated sludge is filled in the tank body (1), and an anaerobic filler layer and an aerobic filler layer are respectively filled in the anaerobic zone and the aerobic zone;
The water distributor (2) is arranged at the bottom of the tank body (1), and the water distributor (2) is used for guiding sewage into the anaerobic zone; the water distributor (2) is provided with an annular water inlet pipeline, a plurality of first water inlets are uniformly distributed on the inner ring of the annular water inlet pipeline, the water outlet directions of the first water inlets and the annular water inlet pipeline form an included angle of 45 degrees, a plurality of second water inlets are uniformly distributed on the top of the annular water inlet pipeline, and the water outlet directions of the second water inlets are vertically upward;
The cyclone aeration device (3), the cyclone aeration device (3) is arranged between the facultative zone and the aerobic zone, and the cyclone aeration device (3) is connected with external air supply equipment through an air inlet (4);
the water outlet (5) is arranged at the top of the tank body (1);
The anaerobic filler layer is attached with a biomembrane with anaerobic ammonia oxidizing bacteria, anaerobic methanation bacteria and denitrifying bacteria, the aerobic filler layer is attached with a biomembrane with aerobic ammonia oxidizing bacteria and nitrifying bacteria, the activated sludge contains biological flora, and the biological flora is a facultative flora which is mutually restricted and interdependent and is formed by three flora of anaerobic ammonia oxidizing bacteria, nitrifying bacteria, denitrifying bacteria and bacillus.
2. The vertical flow type AO sewage treatment device according to claim 1, wherein the aerobic zone is provided with an annular partition plate (6), a sludge precipitation zone is arranged between the annular partition plate (6) and the inner wall of the tank body (1), and a through-flow port (7) is arranged at the top of the annular partition plate (6).
3. A vertical flow AO sewage treatment device according to claim 2, wherein a baffle (8) is arranged outside the annular partition plate (6), and the middle part of the tank body (1) narrows and forms a sludge return seam (9) with the annular partition plate (6).
4. A vertical flow AO sewage treatment device according to claim 3, wherein the top of the sludge settling zone is provided with a first annular water collection tank (10), said first annular water collection tank (10) being in communication with the water outlet (5).
5. The vertical flow type AO sewage treatment device according to claim 4, wherein a denitrification region is arranged on the outer side of the lower portion of the tank body (1), a denitrification region water inlet (11) is arranged on one side of the denitrification region, and the water outlet (5) is communicated with the denitrification region water inlet (11) through a flow guide pipe (12).
6. The vertical flow type AO sewage treatment device according to claim 5, wherein the denitrification region is filled with an autotrophic denitrification filter layer (17), a second annular water collecting tank (13) is arranged at the top of the denitrification region, and the second annular water collecting tank (13) is communicated with a water outlet (14).
7. The vertical flow AO sewage treatment device according to claim 6, wherein a sludge discharge pipe (15) is further arranged at the bottom of the tank body (1), and the sludge discharge pipe (15) extends into the tank body (1) and is provided with a plurality of branch pipes.
8. The vertical flow AO sewage treatment device according to claim 7, wherein the bottom of the tank (1) is further provided with an emptying pipe (16).
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| CN117209063A (en) * | 2023-09-28 | 2023-12-12 | 北京清环科技有限公司 | Vertical flow type AO sewage treatment device and sewage treatment method thereof |
| CN117209063B (en) * | 2023-09-28 | 2025-08-01 | 北京清环科技有限公司 | Vertical flow type AO sewage treatment device and sewage treatment method thereof |
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