CN112624332A - AO effluent disposal system - Google Patents
AO effluent disposal system Download PDFInfo
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- CN112624332A CN112624332A CN202011287626.7A CN202011287626A CN112624332A CN 112624332 A CN112624332 A CN 112624332A CN 202011287626 A CN202011287626 A CN 202011287626A CN 112624332 A CN112624332 A CN 112624332A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
Abstract
The invention discloses an AO wastewater treatment system, comprising: the anaerobic reaction zone comprises an anaerobic precipitation zone, an anaerobic bed zone and an anaerobic mud bucket zone, and the anaerobic precipitation zone, the anaerobic bed zone and the anaerobic mud bucket zone are communicated with each other; the aerobic reaction zone comprises an aerobic sedimentation zone, an aerobic bed zone and an aerobic mud bucket zone, the aerobic sedimentation zone, the aerobic bed zone and the aerobic mud bucket zone are communicated with each other, and the aerobic mud bucket zone is communicated with the anaerobic sedimentation zone; the nitrifying liquid reflux system comprises a clear water area, the clear water area is communicated with the aerobic sedimentation area, the top of the clear water area is provided with a water outlet, and the bottom of the clear water area is communicated with the anaerobic mud bucket area; the sludge discharge system comprises a sludge area, wherein the sludge area, an anaerobic sludge bucket area and an aerobic sludge bucket area are communicated with each other, and a sludge discharge port is formed in the bottom of the side surface of the sludge area. The invention is an integrated system, has a vertical structure, reduces the occupied area, reduces a sludge reflux pump compared with the traditional activated sludge AO system, reduces investment equipment and energy consumption, and simultaneously improves the specificity of microorganisms.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an AO wastewater treatment system.
Background
The A/O process is one traditional aerobic biological sewage treating process, and combines anaerobic section and aerobic section to eliminate CODcr from waste water and ammonia nitrogen and total phosphorus. The principle is as follows: the A/O process hydrolyzes suspended pollutants such as starch, fiber, carbohydrate and the like and soluble organic matters in the sewage into organic acid by heterotrophic bacteria in an anaerobic section, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, and when products after anaerobic hydrolysis enter an aerobic tank for aerobic treatment, the biodegradability of the sewage is improved, and the oxygen efficiency is improved; in the anaerobic zone heterotrophic bacteria, protein, fat and other pollutants are ammoniated (N on an organic chain or amino in amino acid) to release ammonia (NH)3、NH4 +) Under the condition of sufficient oxygen supply, the nitrification of autotrophic bacteria can react NH3-N(NH4 +) Oxidation to NO3 -Returning to the pool A through reflux control, and under the anaerobic condition, carrying out denitrification on the heterotrophic bacteria to obtain NO3 -Reduced to molecular nitrogen (N)2) C, N, O, the ecological cycle is completed, and the sewage harmless treatment is realized.
The conventional AO wastewater treatment system occupies a large area; a large number of power systems are needed, a large amount of electric energy is consumed for nitrifying liquid backflow and sludge backflow, and the manufacturing cost is high; can not ensure the specificity of the sludge and has lower treatment efficiency.
Disclosure of Invention
The present invention aims to provide an AO-waste water treatment system to solve one or more of the technical problems of the prior art, and to at least provide a useful alternative or creation.
The technical scheme adopted for solving the technical problems is as follows:
an AO wastewater treatment system comprising:
the anaerobic reaction zone sequentially comprises an anaerobic precipitation zone, an anaerobic bed zone and an anaerobic mud bucket zone from top to bottom, the anaerobic precipitation zone, the anaerobic bed zone and the anaerobic mud bucket zone are communicated with each other, and a water inlet is formed in the side surface of the anaerobic mud bucket zone;
the aerobic reaction zone is arranged on the side surface of the anaerobic reaction zone, the aerobic reaction zone sequentially comprises an aerobic precipitation zone, an aerobic bed zone and an aerobic mud bucket zone from top to bottom, the aerobic precipitation zone, the aerobic bed zone and the aerobic mud bucket zone are communicated with each other, and the aerobic mud bucket zone is communicated with the anaerobic precipitation zone;
the nitrifying liquid reflux system comprises a clear water area, the clear water area is arranged on the side surface of the aerobic reaction area, the clear water area is communicated with the aerobic sedimentation area, a water outlet is formed in the top of the clear water area, and the bottom of the clear water area is communicated with the anaerobic mud bucket area;
the sludge discharge system comprises a sludge area, the sludge area is arranged on the side surface of the aerobic reaction area, the sludge area, the anaerobic sludge bucket area and the aerobic sludge bucket area are communicated with each other, and a sludge discharge port is arranged at the bottom of the side surface of the sludge area.
The invention is an integrated system, the whole system is in a vertical structure, and the anaerobic reaction zone, the sedimentation zone in the aerobic reaction zone, the bed layer zone and the mud bucket zone are arranged from top to bottom, so that the structure is more compact, and the occupied area is small. The top of the anaerobic reaction zone and the top of the aerobic reaction zone are both provided with sludge-water separation settling zones which are used for ensuring the specificity of various anaerobic sludge and aerobic sludge and improving the treatment efficiency of pollutants, and simultaneously, the water inlet of the settling zones is uniformly distributed into the settling zones through gaps among the baffles, so that the water flow is stable, and the short flow of the outlet water is avoided. The bottom of the anaerobic reaction zone and the bottom of the aerobic reaction zone are both provided with the mud bucket zones, so that heavier inorganic particles can be collected, and inorganic sludge can be discharged through the sludge discharge system, so that the content of the inorganic sludge in the system can be reduced.
As a further improvement of the above technical solution, a first baffle, a second baffle and a third baffle are arranged in the anaerobic precipitation zone, the anaerobic precipitation zone is divided into a first anaerobic precipitation zone, a second anaerobic precipitation zone and a third anaerobic precipitation zone by the first baffle and the second baffle, the top end of the second baffle is higher than the top end of the first baffle, the bottom end of the first baffle extends downwards towards the direction close to the second baffle, and the third baffle is arranged below the second anaerobic precipitation zone and the third anaerobic precipitation zone in a downward inclination manner. Muddy water mixed liquor can rise along first anaerobic precipitation zone earlier under the blockking of first baffle and third baffle, and mud separates gradually after rising to a take the altitude, because the top of second baffle is higher than the top of first baffle for different weight's mud can be followed first anaerobic precipitation zone and second anaerobic precipitation zone in proper order and precipitate and drop, and the vast majority mud can separate the sediment this moment, and the supernatant flows into in the third anaerobic precipitation zone.
As a further improvement of the above technical scheme, an overflow pipe is arranged in the anaerobic reaction zone, one end of the overflow pipe penetrates through the third baffle plate and extends into the third anaerobic sedimentation zone, the other end of the overflow pipe extends into the aerobic mud bucket zone, and the top end of the second baffle plate is higher than a water line in the anaerobic sedimentation zone. The anaerobic reaction zone and the aerobic reaction zone are relatively independent by arranging the overflow pipe and are communicated only by the overflow pipe, so that parameters (DO, ORP, sludge concentration and the like) of the two tanks are easier to control independently, and the effects of denitrification, COD removal and ammonia nitrogen removal are better. Because the top end of the second baffle is higher than the water line in the anaerobic sedimentation area, the supernatant can further block scum in the process of flowing into the third anaerobic sedimentation area and then flows into the aerobic mud bucket area through the flow pipe, thereby ensuring the specificity of various anaerobic sludge and aerobic sludge.
As a further improvement of the technical scheme, a distributor is arranged between the anaerobic bed area and the anaerobic mud bucket area, and a plurality of water through holes with the diameter of 30-40 mm are uniformly formed in the distributor. The distributor is arranged to distribute water uniformly.
As a further improvement of the above technical scheme, two fourth baffles are arranged in the aerobic bed zone, the aerobic bed zone is divided into an ascending bed zone and two descending bed zones by the two fourth baffles, the two descending bed zones are respectively located on two sides of the ascending bed zone, and an aeration device is arranged at the bottom of the ascending bed zone. Under the aeration action of the aeration device, ascending air flow is formed, so that the muddy water mixed liquor is integrally pushed upwards along the ascending bed layer area and then flows downwards along the descending bed layer areas on the two sides to form 2 circulation flows on the two sides, and the muddy water mixed liquor at the bottom of the descending bed layer area is supplemented to the ascending bed layer area, so that the muddy water mixed liquor continuously circulates in the whole bed layer, and the pollutant purification effect is achieved. The aeration device is arranged at the bottom and can stir the bottom sludge.
As a further improvement of the technical scheme, a gas collecting hood is arranged in the aerobic sedimentation zone, the gas collecting hood is positioned above the ascending bed zone, and the top of the gas collecting hood is provided with a gas guide pipe. Bubbles generated by the mud-water mixed liquid are collected through the gas collecting hood and discharged to the outside through the gas guide pipe, so that the influence on the mud-water separation in the aerobic sedimentation area is avoided.
As a further improvement of the above technical scheme, two fifth baffles and two sixth baffles are arranged in the aerobic sedimentation zone, the two fifth baffles are symmetrically arranged on two sides of the gas collecting hood, the two sixth baffles are symmetrically arranged on two sides of the gas collecting hood and located between the two fifth baffles, the top end of each fifth baffle is higher than the top end of each sixth baffle, the bottom end of each sixth baffle extends downwards towards the direction close to the corresponding fifth baffle, overflow chutes are arranged on the inner walls of the two sides of the aerobic sedimentation zone, the top ends of the sixth baffles are higher than the water surface line in the aerobic sedimentation zone, and the overflow chutes are communicated with the clear water zone. The mud-water mixed liquid rises along the ascending bed area and rises to the aerobic sedimentation area along the sixth baffle plate, sludge is gradually separated after rising to a certain height, the top end of the fifth baffle plate is higher than the top end of the sixth baffle plate, so that the sludge with different weights can be sequentially precipitated and fall off, most of the sludge can be separated and precipitated at the moment, the supernatant flows into the overflow groove, and the scum can be further blocked in the process that the supernatant flows into the overflow groove because the top end of the fifth baffle plate is higher than the water surface line in the aerobic sedimentation area.
As a further improvement of the technical scheme, the AO wastewater treatment system further comprises a connecting pipe and a flow guide pipe, the two overflow chutes are communicated through the connecting pipe, one end of the flow guide pipe is arranged in one of the overflow chutes, and the other end of the flow guide pipe extends into the clean water area. The supernatant fluid is converged into one overflow groove through a connecting pipe and then uniformly flows into the clear water area through a guide pipe.
As a further improvement of the technical scheme, the nitrifying liquid reflux system further comprises a reflux pipe and a reflux pump, one end of the reflux pipe is communicated with the bottom of the side face of the clear water area, the other end of the reflux pipe is communicated with the anaerobic sludge bucket area, the reflux pump is communicated with the reflux pipe, and the reflux pipe is provided with a one-way valve. Through setting up back flow and backwash pump, make the water in the clear water district flow back to the anaerobism mud bucket district through nitrifying liquid return-flow system in, carry out the getting rid of total nitrogen, but circulation treatment waste water, the treatment effect is good.
As a further improvement of the technical scheme, the sludge discharge system further comprises a sludge discharge pipe, the sludge discharge pipe is respectively communicated with the sludge area, the anaerobic sludge bucket area and the aerobic sludge bucket area, and ball valves are arranged at the joints of the sludge discharge pipe and the sludge area, the anaerobic sludge bucket area and the aerobic sludge bucket area. Through setting up the ball valve, make the mud system of arranging carry out gravity type mud of arranging through the liquid level difference, consequently need not set up the mud pump, reduce power device, reduce cost.
Drawings
The invention is further described below with reference to the accompanying drawings and examples.
FIG. 1 is a top view of the present invention;
fig. 2 is a right side view of the present invention.
In the figure, 100-anaerobic precipitation zone, 110-first baffle plate, 120-second baffle plate, 130-third baffle plate, 140-first anaerobic precipitation zone, 150-second anaerobic precipitation zone, 160-third anaerobic precipitation zone, 170-overflow pipe, 200-anaerobic bed zone, 210-distributor, 300-anaerobic bagger zone, 310-water inlet, 400-aerobic precipitation zone, 410-gas collecting hood, 411-gas guide pipe, 420-fifth baffle plate, 430-sixth baffle plate, 440-overflow trough, 500-aerobic bed zone, 510-fourth baffle plate, 520-ascending bed zone, 521-aeration device, 530-descending bed zone, 600-aerobic bagger zone, 700-clear water zone, 710-water outlet, 800-sludge zone, 810-sludge outlet, 900-connecting pipe, 1000-honeycomb duct, 1100-return pipe, 1200-reflux pump, 1300-sludge discharge pipe.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to FIGS. 1 and 2, in an embodiment of the present invention, an AO wastewater treatment system includes:
the anaerobic reaction zone sequentially comprises an anaerobic sedimentation zone 100, an anaerobic bed zone 200 and an anaerobic mud bucket zone 300 from top to bottom, the anaerobic sedimentation zone 100, the anaerobic bed zone 200 and the anaerobic mud bucket zone 300 are communicated with each other, and a water inlet 310 is formed in the side surface of the anaerobic mud bucket zone 300;
the aerobic reaction zone is arranged on the side surface of the anaerobic reaction zone, the aerobic reaction zone sequentially comprises an aerobic sedimentation zone 400, an aerobic bed zone 500 and an aerobic mud bucket zone 600 from top to bottom, the aerobic sedimentation zone 400, the aerobic bed zone 500 and the aerobic mud bucket zone 600 are communicated with each other, and the aerobic mud bucket zone 600 is communicated with the anaerobic sedimentation zone 100;
the nitrifying liquid reflux system comprises a clear water area 700, wherein the clear water area 700 is arranged on the side surface of the aerobic reaction area, the clear water area 700 is communicated with the aerobic sedimentation area 400, a water outlet 710 is formed in the top of the clear water area 700, and the bottom of the clear water area 700 is communicated with the anaerobic sludge hopper area 300;
the sludge discharge system comprises a sludge area 800, wherein the sludge area 800 is arranged on the side surface of the aerobic reaction area, the sludge area 800, the anaerobic sludge bucket area 300 and the aerobic sludge bucket area 600 are communicated with each other, and a sludge discharge port 810 is formed in the bottom of the side surface of the sludge area 800.
In this embodiment, the aerobic reaction zone is funnel-shaped as a whole, the top aerobic sedimentation zone 400 has a large area, the aerobic bed zone 500 and the aerobic bagger zone 600 have a small area, the clean water zone 700 and the sludge zone 800 can be sequentially arranged on the side surfaces of the aerobic bed zone 500 and the aerobic bagger zone 600 from top to bottom, and the clean water zone 700 and the sludge zone 800 are both located below the aerobic sedimentation zone 400, so that the structure is more compact and the floor area is smaller.
In some embodiments, a first baffle 110, a second baffle 120 and a third baffle 130 are arranged in the anaerobic precipitation zone 100, the first baffle 110 and the second baffle 120 divide the anaerobic precipitation zone 100 into a first anaerobic precipitation zone 140, a second anaerobic precipitation zone 150 and a third anaerobic precipitation zone 160, the top end of the second baffle 120 is higher than the top end of the first baffle 110, the bottom end of the first baffle 110 extends downwards towards the direction close to the second baffle 120, and the third baffle 130 is arranged below the second anaerobic precipitation zone 150 and the third anaerobic precipitation zone 160 in a downward inclined manner.
In some embodiments, an overflow pipe 170 is disposed in the anaerobic reaction zone, one end of the overflow pipe 170 penetrates through the third baffle 130 and extends into the third anaerobic sedimentation zone 160, the other end of the overflow pipe 170 extends into the aerobic hopper zone 600, and the top end of the second baffle 120 is higher than the water line in the anaerobic sedimentation zone 100.
In some embodiments, a distributor 210 is arranged between the anaerobic bedding area 200 and the anaerobic bagger area 300, and a plurality of water through holes are uniformly formed on the distributor 210.
In some embodiments, two fourth baffles 510 are arranged in the aerobic bed area 500, the two fourth baffles 510 divide the aerobic bed area 500 into an ascending bed area 520 and two descending bed areas 530, the two descending bed areas 530 are respectively arranged on two sides of the ascending bed area 520, and an aeration device 521 is arranged at the bottom of the ascending bed area 520.
In some embodiments, a gas collecting hood 410 is provided in the aerobic sedimentation zone 400, the gas collecting hood 410 is located above the ascending bed zone 520, and a gas guide pipe 411 is provided on the top of the gas collecting hood 410.
In some embodiments, two fifth baffles 420 and two sixth baffles 430 are disposed in the aerobic sedimentation zone 400, the two fifth baffles 420 are symmetrically disposed on two sides of the gas collecting hood 410, the two sixth baffles 430 are symmetrically disposed on two sides of the gas collecting hood 410 and located between the two fifth baffles 420, the top end of the fifth baffle 420 is higher than the top end of the sixth baffle 430, the bottom end of the sixth baffle 430 extends downward toward the direction close to the fifth baffle 420, the inner walls of the aerobic sedimentation zone 400 on two sides are both provided with overflow chutes 440, the top ends of the sixth baffles 430 are higher than the water level line in the aerobic sedimentation zone 400, and the overflow chutes 440 are communicated with the clean water zone 700.
In some embodiments, the AO waste water treatment system further comprises a connecting pipe 900 and a draft tube 1000, the two overflow tanks 440 are communicated through the connecting pipe 900, one end of the draft tube 1000 is disposed in one of the overflow tanks 440, and the other end of the draft tube 1000 extends into the clean water area 700.
In some embodiments, the nitrifying liquid reflux system further comprises a reflux pipe 1100 and a reflux pump 1200, one end of the reflux pipe 1100 is communicated with the bottom of the side surface of the clear water area 700, the other end of the reflux pipe is communicated with the anaerobic sludge bucket area 300, the reflux pump 1200 is communicated with the reflux pipe 1100, and the reflux pipe 1100 is provided with a one-way valve.
In some embodiments, the sludge discharging system further comprises a sludge discharging pipe 1300, the sludge discharging pipe 1300 is respectively communicated with the sludge area 800, the anaerobic bagger area 300 and the aerobic bagger area 600, and ball valves are respectively arranged at the joints of the sludge discharging pipe 1300 and the sludge area 800, the anaerobic bagger area 300 and the aerobic bagger area 600.
The work flow of the AO wastewater treatment system of the invention is as follows:
under the action of an external water pump, wastewater enters the system from the water inlet 310, under the action of the impulsive force of inlet water and the impulsive force of nitrifying liquid backflow, sludge in the anaerobic sludge bucket area 300 is stirred to form upward plug flow, and the sludge-water mixed liquid is uniformly distributed with upward water flow under the action of the distributor 210. Because the sludge content is less upward under the action of gravity and the sludge-water separation is carried out through the sedimentation effect of the anaerobic sedimentation zone 100, the rising water body is intercepted by the third baffle 130, the sedimentation effect on the second anaerobic sedimentation zone 150 and the third anaerobic sedimentation zone 160 is avoided from being influenced, in the upflow anaerobic reaction zone, the upward water flow is less along the first baffle 110 and the inner wall, the upward water flow enters the second anaerobic sedimentation zone 150 from the top of the first anaerobic sedimentation zone 140, the wastewater short flow and the scum obstruction are prevented through the action of the second baffle 120, then the water body goes downward along the first baffle 110 and the second baffle 120, the further sludge-water separation is carried out at the outlet ends of the two baffles, the supernatant overflows into the third anaerobic sedimentation zone 160, and enters the aerobic mud bucket zone 600 of the internal circulation aerobic reaction zone through the flow pipe 170, the sludge in the anaerobic sedimentation zone 100 returns to the upflow anaerobic reaction zone along the third baffle 130, finally, sludge-water separation is realized, thereby ensuring the specificity of the anaerobic sludge.
The muddy water mixed liquor flowing into the aerobic mud bucket area 600 from the upflow anaerobic reaction area forms ascending air flow by adopting the aeration device in the prior art under the aeration action of the aeration device 521, so that the muddy water mixed liquor is integrally pushed upwards along the ascending bed layer area 520 and then flows downwards along the descending bed layer areas 530 at two sides to form 2 circulation flows at two sides, and the muddy water mixed liquor at the bottom of the descending bed layer areas 530 is supplemented to the ascending bed layer area 520, so that the muddy water mixed liquor continuously circulates in the whole bed layer, and the effect of purifying pollutants is achieved. The generated bubbles are collected by the gas collecting hood 410 and discharged out of the system through the gas guide pipe 411, so that the influence on the mud-water separation of the aerobic sedimentation zone 400 is avoided. The mud-water mixed liquid rises along the rising bed region 520 and rises into the aerobic sedimentation region 400 along the sixth baffle 430, the sludge is gradually separated after rising to a certain height, the top end of the fifth baffle 420 is higher than the top end of the sixth baffle 430, so that the sludge with different weights can be sequentially precipitated and fall off, most of the sludge can be separated and precipitated at the moment, the supernatant overflows and flows into the overflow groove 440, the top end of the fifth baffle 420 is higher than the water surface line in the aerobic sedimentation region 400, scum can be further blocked in the process that the supernatant flows into the overflow groove 440, and the heavier sludge falls back into the internal circulation aerobic reaction region along the inner wall, so that mud-water separation is finally realized.
The supernatant overflows into the overflow trough 440, enters the clear water zone 700 through the draft tube 1000, and is discharged out of the system through the water outlet 710 at the top of the clear water zone 700. Meanwhile, the bottom water in the clear water area 700 flows back to the anaerobic sludge bucket area 300 through the nitrifying liquid reflux system to remove the total nitrogen. The anaerobic sludge bucket area 300 and the aerobic sludge bucket area 600 collect heavy inorganic sludge, discharge the heavy inorganic sludge into the sludge area 800 through the opening and closing of the ball valve, and discharge the sludge through the sludge discharge port 810 of the sludge area 800.
The invention has low cost and less required power: the operation requirement of the system can be met only by a nitrifying liquid reflux pump and an aeration device in the system. Because the top of the anaerobic reaction zone and the top of the aerobic reaction zone are provided with sludge-water separation sedimentation zones, the specificity and the sludge amount in the anaerobic reaction zone and the aerobic reaction zone can be ensured, and a sludge reflux pump is not required. The system discharges mud through gravity type mud discharging through liquid level difference, so a mud discharging pump is not needed. Meanwhile, the muddy water in the anaerobic reaction zone is stirred by the impulsive force of inlet water and the impulsive force of nitrified liquid backflow, and is uniformly distributed by combining a water distributor without a stirrer.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. An AO wastewater treatment system, comprising:
the anaerobic reaction zone sequentially comprises an anaerobic precipitation zone, an anaerobic bed zone and an anaerobic mud bucket zone from top to bottom, the anaerobic precipitation zone, the anaerobic bed zone and the anaerobic mud bucket zone are communicated with each other, and a water inlet is formed in the side surface of the anaerobic mud bucket zone;
the aerobic reaction zone is arranged on the side surface of the anaerobic reaction zone, the aerobic reaction zone sequentially comprises an aerobic precipitation zone, an aerobic bed zone and an aerobic mud bucket zone from top to bottom, the aerobic precipitation zone, the aerobic bed zone and the aerobic mud bucket zone are communicated with each other, and the aerobic mud bucket zone is communicated with the anaerobic precipitation zone;
the nitrifying liquid reflux system comprises a clear water area, the clear water area is arranged on the side surface of the aerobic reaction area, the clear water area is communicated with the aerobic sedimentation area, a water outlet is formed in the top of the clear water area, and the bottom of the clear water area is communicated with the anaerobic mud bucket area;
the sludge discharge system comprises a sludge area, the sludge area is arranged on the side surface of the aerobic reaction area, the sludge area, the anaerobic sludge bucket area and the aerobic sludge bucket area are communicated with each other, and a sludge discharge port is arranged at the bottom of the side surface of the sludge area.
2. The AO wastewater treatment system of claim 1, wherein a first baffle, a second baffle, and a third baffle are provided within the anaerobic settling zone, the first baffle and the second baffle divide the anaerobic settling zone into a first anaerobic settling zone, a second anaerobic settling zone, and a third anaerobic settling zone, a top end of the second baffle is higher than a top end of the first baffle, a bottom end of the first baffle extends downward in a direction approaching the second baffle, and the third baffle is disposed downward sloping below the second anaerobic settling zone and the third anaerobic settling zone.
3. The AO waste water treatment system of claim 2, wherein an overflow pipe is provided in the anaerobic reaction zone, one end of the overflow pipe extends through the third baffle plate and into the third anaerobic sedimentation zone, the other end of the overflow pipe extends into the aerobic baghouse zone, and the top end of the second baffle plate is higher than a water line in the anaerobic sedimentation zone.
4. The AO wastewater treatment system of claim 1, wherein a distributor is disposed between the anaerobic bed zone and the anaerobic baghouse zone, the distributor having a plurality of water holes uniformly disposed thereon.
5. The AO waste water treatment system of claim 1, wherein two fourth baffles are provided in the aerobic bed zone, the two fourth baffles dividing the aerobic bed zone into an ascending bed zone and two descending bed zones, the two descending bed zones being located on either side of the ascending bed zone, respectively, the bottom of the ascending bed zone being provided with an aeration device.
6. The AO waste water treatment system of claim 5, wherein a gas collection hood is provided in the aerobic sedimentation zone, the gas collection hood being located above the ascending bed zone, a gas guide being provided at a top of the gas collection hood.
7. The AO waste water treatment system of claim 6, wherein two fifth baffles and two sixth baffles are arranged in the aerobic sedimentation zone, the two fifth baffles are symmetrically arranged on two sides of the gas-collecting hood, the two sixth baffles are symmetrically arranged on two sides of the gas-collecting hood and located between the two fifth baffles, the top end of each fifth baffle is higher than the top end of each sixth baffle, the bottom end of each sixth baffle extends downwards towards the direction close to the corresponding fifth baffle, overflow chutes are arranged on the inner walls of the two sides of the aerobic sedimentation zone, the top ends of the sixth baffles are higher than the water level line in the aerobic sedimentation zone, and the overflow chutes are communicated with the clean water zone.
8. The AO wastewater treatment system of claim 7, further comprising a connecting pipe and a flow guide pipe, wherein the two overflow launders are connected through the connecting pipe, one end of the flow guide pipe is disposed in one of the overflow launders, and the other end of the flow guide pipe extends into the clean water zone.
9. The AO wastewater treatment system of claim 1, wherein the nitrifying liquid reflux system further comprises a reflux pipe and a reflux pump, one end of the reflux pipe is communicated with the bottom of the side surface of the clear water area, the other end of the reflux pipe is communicated with the anaerobic sludge bucket area, the reflux pump is communicated with the reflux pipe, and the reflux pipe is provided with a one-way valve.
10. The AO waste water treatment system of claim 1, wherein the sludge discharge system further comprises a sludge discharge pipe, the sludge discharge pipe is respectively communicated with the sludge area, the anaerobic sludge bucket area and the aerobic sludge bucket area, and ball valves are respectively arranged at the joints of the sludge discharge pipe and the sludge area, the anaerobic sludge bucket area and the aerobic sludge bucket area.
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| CN202011287626.7A CN112624332B (en) | 2020-11-17 | 2020-11-17 | AO effluent disposal system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050040107A1 (en) * | 2003-08-20 | 2005-02-24 | Kasparian Kaspar A. | Single vessel multi-zone wastewater bio-treatment system |
| CN203866158U (en) * | 2014-05-26 | 2014-10-08 | 徐州工程学院 | Concentric type integrated sewage treatment system |
| CN106336072A (en) * | 2016-08-29 | 2017-01-18 | 中冶焦耐(大连)工程技术有限公司 | Integrated double-circulation aerobiotic reactor and wastewater treatment process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050040107A1 (en) * | 2003-08-20 | 2005-02-24 | Kasparian Kaspar A. | Single vessel multi-zone wastewater bio-treatment system |
| CN203866158U (en) * | 2014-05-26 | 2014-10-08 | 徐州工程学院 | Concentric type integrated sewage treatment system |
| CN106336072A (en) * | 2016-08-29 | 2017-01-18 | 中冶焦耐(大连)工程技术有限公司 | Integrated double-circulation aerobiotic reactor and wastewater treatment process |
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