CN116199384A - Efficient multi-cycle integrated AAO treatment device and process - Google Patents

Efficient multi-cycle integrated AAO treatment device and process Download PDF

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Publication number
CN116199384A
CN116199384A CN202310224569.5A CN202310224569A CN116199384A CN 116199384 A CN116199384 A CN 116199384A CN 202310224569 A CN202310224569 A CN 202310224569A CN 116199384 A CN116199384 A CN 116199384A
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zone
aerobic
anoxic
stage
treatment
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Chinese (zh)
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刘俊
闫珍
章长江
高艳玲
彭云昌
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ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
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ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • 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
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms
    • 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
    • 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
    • C02F3/308—Biological phosphorus removal
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a high-efficiency multi-cycle integrated AAO treatment device and a process, wherein the device comprises an anaerobic zone, an anoxic zone, an aerobic first zone, an aerobic second zone, an aerobic third zone, a water distribution zone, a double-layer secondary sedimentation tank and a sludge pump station; the anaerobic zone, the aerobic zone and the aerobic zone are respectively provided with a partition wall and two impellers which are oppositely arranged, the two ends of the partition wall are respectively provided with a flow guide wall, the impellers are arranged on the two sides of the partition wall, the partition wall divides the anaerobic zone into the anaerobic zone and the anoxic zone, the aerobic zone is divided into an aerobic zone one stage and an aerobic zone two stage, and aeration devices are arranged in the aerobic zone one, the aerobic zone two and the aerobic zone three. The utility model can achieve the aim of improving the sewage treatment efficiency by constructing the water distribution area, the double-layer secondary sedimentation tank and the AAO tank in a combined way.

Description

Efficient multi-cycle integrated AAO treatment device and process
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a high-efficiency multi-cycle integrated AAO treatment device and a process.
Background
At present, in sewage treatment, main flow biochemical treatment processes are an oxidation ditch and an AAO process, the sludge age of the oxidation ditch process is long, sludge expansion is easy to occur, the denitrification and dephosphorization requirements of the AAO process are mutually contradictory, the denitrification requirement is lower, the sludge age is longer, the dephosphorization requirement is higher, the sludge age is shorter, and the balance is often difficult; and as the anaerobic zone and the anoxic zone are preceded, nitrate and dissolved oxygen in the external reflux sludge and the internal reflux sludge have adverse effects on the anaerobic zone and the anoxic zone, and the dephosphorization and denitrification efficiency is reduced, a high-efficiency multi-cycle integrated AAO treatment device and process are needed to solve the problem.
Disclosure of Invention
The utility model aims to provide a high-efficiency multi-cycle integrated AAO treatment device and a process, so as to solve the problems and achieve the aim of improving the sewage treatment efficiency.
In order to achieve the above object, the present utility model provides the following solutions: an efficient multi-cycle integrated AAO treatment device comprises an anaerobic zone, an anoxic zone, an aerobic first zone, an aerobic second zone, an aerobic third zone and a water distribution zone; the anaerobic zone, the aerobic zone and the middle part of the aerobic zone are respectively provided with a partition wall and two impellers which are oppositely arranged, the two ends of the partition wall are respectively provided with a flow guide wall, the impellers are arranged on two sides of the partition wall, the partition wall positioned in the anaerobic zone divides the anaerobic zone into an anoxic zone and an anoxic zone, the partition wall positioned in the aerobic zone divides the aerobic zone into an aerobic zone one stage and an aerobic zone two stage, the partition wall positioned in the aerobic zone divides the aerobic zone into an aerobic zone two one stage and an aerobic zone two stage, and aeration devices are arranged in the aerobic zone one, the aerobic zone two stage and the aerobic zone three.
An efficient multi-cycle integrated AAO treatment process based on the efficient multi-cycle integrated AAO treatment device comprises the following steps:
step one: anaerobic treatment, namely discharging wastewater to the anaerobic zone for anoxic pretreatment;
step two: anoxic treatment, namely discharging the sewage subjected to anaerobic treatment into the anoxic zone to enable the sewage to undergo denitrification and anaerobic phosphorus release reaction;
step three: aerobic treatment, namely discharging the wastewater subjected to the anoxic treatment into the first aerobic zone and the second aerobic zone, and carrying out nitrification and aerobic phosphorus absorption treatment on the wastewater by combining an aeration device;
step four: and (3) performing precipitation treatment, namely discharging the sewage after the aerobic treatment into a double-layer precipitation area for precipitation, and obtaining the treated sewage.
Preferably, in the second step, a carbon source adding point is arranged in the anoxic second region, and a diving camera is arranged below the carbon source adding point.
Preferably, the aerobic three region and the anoxic two region are communicated through an internal reflux pump, and a valve and a flowmeter are arranged in the pipeline of the internal reflux pump.
Preferably, a nitrate nitrogen detector is arranged at the water inlet end of the anaerobic zone, and when the nitrate nitrogen detector detects that the total nitrogen at the water inlet end is higher than 45mg/L, the nitrate nitrogen detector controls the aeration device of the first stage of the aerobic first zone to be closed through a PLC controller so that the first stage of the aerobic first zone is converted into an anoxic state.
Preferably, NH is arranged at the water inlet end of the anaerobic zone 3 -N detector and COD detector, when water is fed in NH 3 And (3) controlling the aeration device of the first stage of the aerobic second zone to be closed through a PLC controller, so that the first stage of the aerobic second zone is in an anoxic state, and a two-stage AO process is formed.
Preferably, the guide wall in the aerobic secondary zone is a flexible guide wall, a flexible guide rail is arranged below the flexible guide wall, and the flexible guide rail is driven by a waterproof motor; when the pollutant index of the anaerobic zone is lower, the waterproof motor is started, the flexible guide wall on the left side of the aerobic second zone is straightened, sewage directly exceeds the aerobic second zone and enters the aerobic third zone, meanwhile, the propeller of the aerobic second zone is closed, and the micro aeration of the aeration device of the aerobic second zone is regulated.
Preferably, a water distribution area and a water distribution wall are arranged between the double-layer sedimentation area and the aerobic three area in the fourth step, and a sludge pump station is arranged on one side of the double-layer sedimentation area.
The utility model has the following technical effects: the two propellers are matched with the partition wall and the guide wall to enable the water flow to flow around the partition wall, the anoxic zone, the aerobic zone and the aerobic zone are in a mixed and plug flow state when sewage treatment is carried out, the plug flow and complete mixing states are arranged in each independent aerobic zone, the short flow is effectively overcome, the buffer capacity is improved, the water inlet and outlet positions of each independent aerobic zone are similar, the water inlet is well mixed and dispersed in the circulation through the aeration device, and the mixed liquid is circulated again according to the functions of the partition wall, the guide wall and the propellers. Thus, the sewage is in a plug flow state in a short period (such as one cycle) and is in a mixed state in a long period (such as multiple cycles), so that the sewage is subjected to at least one cycle to basically stop short flow, and a large dilution multiple can be provided to improve the buffering capacity and further improve the sewage treatment efficiency.
Drawings
For a clearer description of an embodiment of the utility model or of the solutions of the prior art, the drawings that are needed in the embodiment will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art:
FIG. 1 is a schematic plan view of the device of the present utility model;
FIG. 2 is a process flow diagram of the present utility model;
FIG. 3 is a schematic diagram of a double-layer precipitation zone structure according to the present utility model;
1, a water inlet; 2. a guide wall; 3. partition walls; 4. a propeller; 5. an internal reflux pump; 6. and (5) a water distribution flower wall.
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.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1-3, the embodiment provides a high-efficiency multi-cycle integrated AAO treatment device, which comprises an anaerobic zone, an anoxic zone, an aerobic first zone, an aerobic second zone, an aerobic third zone and a water distribution zone; the middle parts of the anoxic zone, the aerobic zone and the aerobic zone are respectively provided with a partition wall 3 and two impellers 4 which are oppositely arranged, two ends of the partition wall 3 are respectively provided with a guide wall 2, the two guide walls 2 are symmetrically arranged, the impellers 4 are arranged at two sides of the partition wall 3, the partition wall 3 positioned in the anoxic zone divides the anoxic zone into an anoxic zone and an anoxic zone, the partition wall 3 positioned in the aerobic zone divides the aerobic zone into an aerobic zone one stage and an aerobic zone two stage, and aeration devices are arranged in the aerobic zone one, the aerobic zone two and the aerobic zone three. The anaerobic zone is provided with a water inlet 1, and sewage to be treated enters from the water inlet 1.
The impellers 4 can play a role in promoting water flow, the two impellers 4 are matched with the partition wall 3 and the guide wall 2 so that water flow can flow around the partition wall 3, an anoxic zone, an aerobic zone and an aerobic zone are in a mixed and plug flow state when sewage treatment is carried out, the plug flow and complete mixing state exists in each independent aerobic zone, short flow is effectively overcome, the buffer capacity is improved, the water inlet and outlet positions of each independent aerobic zone are similar, inlet water is well mixed and dispersed in circulation through an aeration device, and mixed liquid continues to circulate again according to the functions of the partition wall 3, the guide wall 2 and the impellers 4. Thus, the sewage is in a plug flow state in a short period (such as one cycle) and is in a mixed state in a long period (such as multiple cycles), so that the sewage is subjected to at least one cycle to basically stop short flow, and a large dilution multiple can be provided to improve the buffering capacity and further improve the sewage treatment efficiency.
Specifically, the aeration device comprises a blower, the air outlet end of the blower is communicated with a plurality of aeration pipes, and the aeration pipes are respectively connected with the aerobic first zone, the aerobic second zone and the aerobic third zone.
Specifically, the aeration devices of the aerobic first zone, the aerobic second zone and the aerobic third zone are controlled by separate electric butterfly valves, and a certain dissolved oxygen concentration gradient is formed in each independent aerobic zone according to the opening degree, the closing degree or the opening degree of the valve, so that the aeration device is suitable for a nitrification-denitrification process.
An efficient multi-cycle integrated AAO treatment device and a process based on the same, comprising the following steps:
step one: anaerobic treatment, namely discharging the wastewater to an anaerobic zone for anoxic pretreatment;
step two: anoxic treatment, namely discharging the sewage subjected to anaerobic treatment into the anoxic zone to enable the sewage to undergo denitrification and anaerobic phosphorus release reaction;
step three: aerobic treatment, namely discharging the wastewater subjected to the anoxic treatment into the first aerobic zone and the second aerobic zone, and carrying out nitrification and aerobic phosphorus absorption treatment on the wastewater by combining an aeration device;
step four: and (3) performing precipitation treatment, namely discharging the sewage after the aerobic treatment into a double-layer precipitation area for precipitation, and obtaining the treated sewage.
In the second step, a carbon source adding point is arranged in the anoxic second region, and a diving camera is arranged below the carbon source adding point. Is helpful for observing whether the medicine is added or not and the dosage. Referring to fig. 2, a carbon source is pushed into a dosing tube by a carbon source dosing device, the carbon source is added to an anoxic zone by the dosing tube, and the carbon source addition is observed by a diving camera.
According to a further optimization scheme, the aerobic third region and the anoxic second region are communicated through an internal reflux pump, and a valve and a flowmeter are arranged in a pipeline of the internal reflux pump. At present, the deep denitrification of a sewage treatment plant is basically considered to be carried out in a denitrification deep bed filter, but the denitrification effect of the denitrification deep bed filter is limited, once the carbon source addition amount exceeds the standard, the COD risk of the effluent is increased. The adding position is shown in figure 1, avoids an internal reflux water pump, and reduces the influence of internal reflux dissolved oxygen on the effect of a carbon source at a position 6m below the internal reflux water pump.
According to the further optimization scheme, a nitrate nitrogen detector is arranged at the water inlet end of the anaerobic zone, when the nitrate nitrogen detector detects that the total nitrogen at the water inlet end is higher than 45mg/L, the nitrate nitrogen detector controls the aeration device of the aerobic zone to be closed through the PLC controller, so that the aerobic zone is converted into an anoxic state at one stage, the stay time of the anoxic zone is prolonged, and the denitrification effect is met. Meanwhile, according to the total nitrogen higher value, the reflux quantity required to be increased by the internal reflux pump is accurately calculated, and the reflux quantity of the internal reflux pump is increased, so that the final water TN of the biochemical tank is smaller than the design value.
Further optimizing scheme, NH is arranged at the water inlet end of the anaerobic zone 3 -N detector and COD detector, when water is fed in NH 3 The N is more than 40mg/L, the COD of the inflow water is less than 150mg/L, and the aeration device of the first stage of the aerobic second zone is controlled to be closed by the PLC controller, so that the first stage of the aerobic second zone is in an anoxic state, and a two-stage AO process is formed. The two-stage AO process is divided into four stages of an anoxic section (A1, an anoxic zone I and an anoxic zone II), an aerobic section (O1, an aerobic zone I), an anoxic section (A2, an aerobic zone II is switched to the anoxic zone), and an aerobic section (O2, an aerobic zone III), and the conditions of dissolved oxygen, pH value, sludge age and the like of an O1 pool are controlled to realize the nitrification reaction of ammonia nitrogen. The mixed liquid of the O1 pool is partially refluxed to the A1 pool, and the denitrification is carried out by fully utilizing the carbon in the source waterThe adding amount of additional carbon sources for denitrification is reduced, and the running cost is saved; the A2 pool realizes denitrification by supplementing a carbon source as the carbon source, the O2 section controls higher dissolved oxygen, and further oxidizes residual carbon source and residual organic matters in sewage, thereby improving the performance of the activated sludge.
According to a further optimization scheme, the guide wall 2 in the aerobic secondary zone is a flexible guide wall, a flexible guide rail is arranged below the flexible guide wall and driven by a waterproof motor, and the flexible guide rail can be selected from flexible guide rails in the utility model patent with application number 202122447905.1; when the pollutant index of the anaerobic zone is lower, a waterproof motor is started, the flexible guide wall at the left side of the aerobic zone II is straightened, sewage directly exceeds the aerobic zone II and enters the aerobic zone III, and meanwhile, the propeller 4 of the aerobic zone II is closed, so that the micro aeration of the aeration device of the aerobic zone II is regulated. The longer the sewage stays in the aerobic zone, the better, the longer the sewage stays, the more microbial metabolites, and the worse the effluent index is. If the index of pollutants in the inflow water is lower, such as COD and TN is lower, the residence time of the aerobic zone can be properly shortened, the left curved flexible partition wall of the aerobic second zone is directly straightened to form a flexible partition wall, sewage directly exceeds the aerobic second zone and enters the aerobic third zone, 2 stirrers in the aerobic second zone are deactivated, the micro aeration of air valves in the second zone is regulated, the sludge is ensured not to be settled, the power consumption can be reduced, and the running cost is saved. The two propellers 4 are deactivated, the power of each stirrer is 5.5kw, and the power is deactivated for 1h, so that 11kw of electric quantity can be saved. Meanwhile, the aeration rate can be saved by about 1/5.
Further optimizing scheme, be equipped with water distribution area and distribution wall 6 between the bilayer sedimentation zone in step four and the good oxygen three district, bilayer sedimentation zone one side is equipped with mud pump station. Adding a sedimentation zone at the tail end of the aerobic three zones, wherein the surface load of the sedimentation zone is 0.6-0.8m 3 /m 2 H, adopting a double-layer secondary sedimentation tank, wherein the height of the upper layer is 5.1m (the height is 1m higher), the height of the lower layer is 4.1m, the water inlet area adopts water inlet flower wall water distribution, the water inlet hole is a water inlet hole with the diameter of 200mm, the lower layer adopts a hydraulic reciprocating mud scraper, and the upper layer adopts a horizontal flow type mud scraping and sucking machine. The upper and lower layer devices independently operate and are not affected. The double-layer secondary sedimentation tank shares a water outlet weir. Adopts a double-layer secondary sedimentation tank, and the secondary sedimentation tank is more conventional single-layerThe electricity consumption of the secondary sedimentation tank is saved by about 1/2, the secondary sedimentation tank is built together with the biochemical tank, the hydraulic loss of a pipeline is reduced, the drop oxygenation capacity is reduced, and the dissolved oxygen can be reduced by 1mg/L in prediction. Simultaneously, a sludge pump station and a secondary sedimentation tank are built together, the tank body is shared, and the occupied area and the manufacturing cost are saved.
The deoxidizer adding area is added at the tail end of the aerobic three area, and deoxidizer is added in the deoxidizer adding area, so that the oxygen content of internal reflux liquid which flows into the anoxic area in an internal reflux way is reduced, the activity of aerobic microorganisms in activated sludge which flows back into the anaerobic area is reduced, the increase of activated sludge in the anoxic area competing with the activated sludge is enhanced, and the denitrification reaction is enhanced. Meanwhile, the sludge after dissolved oxygen flows into the rear secondary sedimentation tank and is subjected to advanced treatment, so that the oxygen content of the advanced treatment process at the rear end of the biochemical region can be reduced, and the denitrification effect of the rear filter tank can be improved. The deoxidizer is particulate, contains sulfite as main component, and Ca (OH) as other components 2 And activated carbon.
For example, a sewage treatment plant in Ningyang county has a water treatment capacity of Q=20000m 3 And/d, the retention time of the aerobic zone is 16h, the length of the aerobic zone is 370.8m, the flow rate of the sewage in the aerobic zone is 0.5m/s, the circulation times of the sewage in the whole retention time are 77.7 times, and the sewage in the anoxic zone enters the aerobic zone and is diluted by more than 70 times of circulation flow. The process can bear impact load of water quantity and water quality:
the first-stage design scale is 4 ten thousand t/d, the second-stage design scale is 2 ten thousand t/d, and the inflow water quality COD is designed: 450mg/L, TN:40mg/L, the first stage adopts a conventional oxidation ditch, and the second stage adopts a high-efficiency multi-cycle A2/O process. The current water quantity is about 5 ten thousand t/d, the first period is about 2.5 ten thousand t/d, and the second period is 2.5 ten thousand t/d. The COD of the inflow water is about 600-700mg/L, TN is about 50mg/L, and under the condition that the inflow water quantity and the water quality exceed the design scale, the COD of the outflow water is stabilized below 30mg/L, and the TN of the outflow water is stabilized below 10 mg/L. COD removal rate reaches 95% and TN removal rate reaches 80%.
In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims (8)

1. The utility model provides a high-efficient multicycle integration AAO processing apparatus which characterized in that: comprises an anaerobic zone, an anoxic zone, an aerobic first zone, an aerobic second zone, an aerobic third zone and a water distribution zone; the anaerobic zone is divided into an anoxic zone and an anoxic zone by the partition wall (3), the aerobic zone is divided into an aerobic zone first stage and an aerobic zone second stage by the partition wall (3), the aerobic zone is divided into an aerobic zone second stage and an aerobic zone second stage by the partition wall (3), and the aerobic zone is provided with aeration devices in the aerobic zone, the aerobic zone and the aerobic zone third zone.
2. The efficient multi-cycle integrated AAO treatment process is based on the efficient multi-cycle integrated AAO treatment device disclosed in claim 1, and is characterized in that: the method comprises the following steps:
step one: anaerobic treatment, namely discharging wastewater to the anaerobic zone for anoxic pretreatment;
step two: anoxic treatment, namely discharging the sewage subjected to anaerobic treatment into the anoxic zone to enable the sewage to undergo denitrification and anaerobic phosphorus release reaction;
step three: aerobic treatment, namely discharging the wastewater subjected to the anoxic treatment into the first aerobic zone and the second aerobic zone, and carrying out nitrification and aerobic phosphorus absorption treatment on the wastewater by combining an aeration device;
step four: and (3) performing precipitation treatment, namely discharging the sewage after the aerobic treatment into a double-layer precipitation area for precipitation, and obtaining the treated sewage.
3. The efficient multi-cycle integrated AAO treatment process of claim 2, wherein: in the second step, a carbon source adding point is arranged in the anoxic second region, and a diving camera is arranged below the carbon source adding point.
4. The efficient multi-cycle integrated AAO treatment process of claim 2, wherein: the aerobic three region and the anoxic two region are communicated through an internal reflux pump, and a valve and a flowmeter are arranged in a pipeline of the internal reflux pump.
5. The efficient multi-cycle integrated AAO treatment process of claim 2, wherein: and when the nitrate nitrogen detector detects that the total nitrogen at the water inlet end is higher than 45mg/L, the nitrate nitrogen detector controls the aeration device at one stage of the aerobic first-stage zone to be closed through the PLC controller so as to convert the aerobic first-stage zone into an anoxic state.
6. The efficient multi-cycle integrated AAO treatment process of claim 2, wherein: NH is arranged at the water inlet end of the anaerobic zone 3 -N detector and COD detector, when water is fed in NH 3 And (3) controlling the aeration device of the first stage of the aerobic second zone to be closed through a PLC controller, so that the first stage of the aerobic second zone is in an anoxic state, and a two-stage AO process is formed.
7. The efficient multi-cycle integrated AAO treatment process of claim 2, wherein: the guide wall (2) positioned in the aerobic secondary zone is a flexible guide wall, a flexible guide rail is arranged below the flexible guide wall, and the flexible guide rail is driven by a waterproof motor; when the pollutant index of the anaerobic zone is lower, the waterproof motor is started, the flexible guide wall on the left side of the aerobic second zone is straightened, sewage directly exceeds the aerobic second zone and enters the aerobic third zone, meanwhile, the propeller (4) of the aerobic second zone is closed, and the micro aeration of the aeration device of the aerobic second zone is regulated.
8. The efficient multi-cycle integrated AAO treatment process of claim 2, wherein: and in the fourth step, a water distribution area and a water distribution wall (6) are arranged between the double-layer sedimentation area and the aerobic three area, and a sludge pump station is arranged on one side of the double-layer sedimentation area.
CN202310224569.5A 2023-03-06 2023-03-06 Efficient multi-cycle integrated AAO treatment device and process Pending CN116199384A (en)

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CN202310224569.5A CN116199384A (en) 2023-03-06 2023-03-06 Efficient multi-cycle integrated AAO treatment device and process

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Application Number Priority Date Filing Date Title
CN202310224569.5A CN116199384A (en) 2023-03-06 2023-03-06 Efficient multi-cycle integrated AAO treatment device and process

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CN116199384A true CN116199384A (en) 2023-06-02

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CN202310224569.5A Pending CN116199384A (en) 2023-03-06 2023-03-06 Efficient multi-cycle integrated AAO treatment device and process

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