CN112794438A - Multistage anoxic-aerobic process method and processor - Google Patents
Multistage anoxic-aerobic process method and processor Download PDFInfo
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- CN112794438A CN112794438A CN202110143023.8A CN202110143023A CN112794438A CN 112794438 A CN112794438 A CN 112794438A CN 202110143023 A CN202110143023 A CN 202110143023A CN 112794438 A CN112794438 A CN 112794438A
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
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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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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
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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
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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- 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
Abstract
A multi-stage anoxic-aerobic process method adopts a multi-dimensional water feeding mode including a lateral mode, a vertical mode and other directions; activated sludge is added into the filler, so that aerobic microorganisms and nitrobacteria are immobilized and grow on the filler; through the optimization and adjustment of the water inlet dimension and the aeration intensity, a multi-stage anoxic/aerobic reaction zone is formed in the lateral direction and can be relatively divided into an anaerobic/anoxic/aerobic reaction zone from bottom to top along the vertical direction. A multi-stage anoxic-aerobic processor for carrying out the method, comprising: the device comprises a processor cavity, a water distribution device and a control device, wherein the processor cavity is provided with a lateral water distribution area, a vertical water distribution area and an aerobic filler module; the aerobic filler module is arranged at the middle upper part of the cavity; the effluent is collected by the water collecting area and then discharged or enters a next-stage treatment system. The sewage flows upwards to bring better mixing effect, and raw water of the sewage provides a carbon source for denitrification reaction in the anoxic zone, so that the biological denitrification efficiency is improved. The multistage anoxic-aerobic process and the processor are integrated, and the inside of the device is composed of module units, so that the device is convenient to mount and dismount.
Description
Technical Field
The invention belongs to the field of water pollution treatment, and relates to a multi-stage anoxic-aerobic process and a multi-stage anoxic-aerobic processor based on a multi-directional water inlet mode.
Background
With the acceleration of the urbanization process and the rapid development of economy, the population quantity of cities and towns is continuously increased, the discharge amount of urban sewage is rapidly increased, and the treatment capacity of urban sewage is greatly tested. At present, the town sewage biological treatment process is mature, and mainly comprises an activated sludge method and a biofilm method. However, in the conventional biological sewage treatment process, a plurality of reaction zones are often required to be arranged in series, anaerobic treatment, anoxic treatment and aerobic treatment are respectively carried out in different reaction tanks, and then the removal effect of nitrogen and phosphorus is improved by increasing internal circulation, so that the basic construction and energy consumption are high, and the operation management is complex. Meanwhile, the content of influent biomass of the current sewage treatment station is generally low, COD (chemical oxygen demand) of a lot of influent is lower than 200mg/L, so that the carbon source for biological nitrogen and phosphorus removal is insufficient, and the operation cost is high by adopting manual addition. Although the utilization rate of the carbon source in raw water can be improved by sectional water inlet, the water inlet distribution is not easy to control, and the COD of the outlet water is easy to be unstable.
Therefore, how to provide a processor device with low total investment, low operating cost, easy operation management, good denitrification and dephosphorization effects and good aesthetics is one of the technical problems to be solved urgently by the technical staff at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a multi-stage anoxic-aerobic process and a multi-stage anoxic-aerobic processor based on a multi-directional water inflow mode.
In order to solve the technical problems, the invention adopts the technical scheme that:
the novel technical scheme of the related coupling process, including the method, the processor structure and the process combination, is adopted.
A multi-stage anoxic-aerobic process method adopts a multi-dimensional water feeding mode including a lateral mode, a vertical mode and other directions; activated sludge is added into the filler, so that aerobic microorganisms and nitrobacteria are immobilized and grow on the filler; through the optimization and adjustment of the water inlet dimension and the aeration intensity, a multi-stage anoxic/aerobic reaction zone is formed in the lateral direction and can be relatively divided into an anaerobic/anoxic/aerobic reaction zone from bottom to top along the vertical direction.
Furthermore, an aerobic functional filler module is arranged in the middle upper part in a sectional and partitioned manner, and aeration is carried out in the aerobic functional filler module.
The high-concentration nitrifying liquid generated in the aerobic zone directly enters the next-stage anoxic zone along with plug flow in the lateral direction on one hand, and can be settled in the lower anoxic zone along with gravity on the other hand.
So that the sewage flows upwards to promote mixing, and raw water of the sewage provides a carbon source for denitrification reaction in the anoxic zone so as to improve the biological denitrification efficiency.
The water inflow distribution is adjusted according to the property of the sewage to be treated, and preferably, the distribution ratio of the lateral water inflow to the vertical water inflow is (4:6) - (7: 3).
Preferably, the lateral water distribution area accounts for 1/3-3/4 of the total lateral area, and the vertical water distribution area accounts for 1/4-3/4 of the total bottom area.
The water distribution surface of vertical water distribution and the vertical space at the bottom of the cavity are sludge gravity concentration and anaerobic digestion areas, the vertical minimum height is set to ensure that the water distribution points are not easily covered by sludge and further cause blockage, and the vertical distance from the bottom is required to ensure that sufficient sludge storage space is reserved without influencing the vertical function distribution.
Preferably, the vertical water distribution point is 0.3-0.8 m higher than the bottom.
Vertical water distribution sets up certain delivery head, increases the upward flow trend of sewage and improves the mixed effect of cavity lower part anoxic zone sewage, avoids the too big destruction that causes anoxic zone and aerobic zone environment of delivery head simultaneously.
Preferably, the water outlet head is 0.2-1.0 m.
The aerobic filler module is of a vertical structure, is arranged at the middle upper part of the cavity, keeps a suspended state in the cavity and is arranged as an independent monomer.
The distance between the top surface of the filler module and the water surface in the cavity is 0-1.0 m; the height of the monomers is not less than 0.5m, and the distance between the monomers is 0-1.0 m.
The aerobic filler module is filled with a microorganism attachment base and is arranged by combining one or two of macromolecule elastic fillers (hydroformylation fiber rings and hydroformylation fiber bundles) and suspension ball fillers.
Preferably, the aeration quantity of the aerobic functional filler modules of different monomers is controllable, and the concentration of dissolved oxygen inside the aerobic functional filler modules is 1-3 mg/L.
The treatment system is set to be of a deep pool structure, the effective water depth is 1.0-2.5 m, and the volume of the treatment system is 1-3 times of the daily treatment water volume.
Floating plants are planted on the water surface in the treatment system, and sewage is purified by the plants and odor generated by biological reaction is absorbed.
The floating plant is more than one of water spinach, cress and agropyron.
Further, the invention also provides a multi-stage anoxic-aerobic processor based on a multidirectional water inflow mode for realizing the method, which comprises the following steps: the device comprises a processor cavity, a water distribution device and a control device, wherein the processor cavity is provided with a lateral water distribution area, a vertical water distribution area and an aerobic filler module; the aerobic filler module is arranged at the middle upper part of the cavity; the effluent is collected by the water collecting area and then discharged or enters a next-stage treatment system.
Through the optimization adjustment of the water inlet dimension and the aeration strength, a multi-stage anoxic/aerobic reaction zone is formed laterally in the cavity and can be relatively divided into an anaerobic/anoxic/aerobic reaction zone along the vertical direction from bottom to top; the aerobic filler module is fixed with the bearing beam through a traction rope, and an aeration head is arranged in the filler module.
The processor cavity is of an integrated frame structure.
Preferably, the processor adopts a multidirectional water inlet mode, is not limited to the lateral direction and the vertical direction, and has the ratio of the lateral water inlet quantity to the vertical water inlet quantity of (4:6) - (7: 3).
Preferably, the lateral water distribution area of the treater accounts for 1/3-3/4 of the total lateral area, and the vertical water distribution area accounts for 1/4-3/4 of the total bottom area.
Preferably, the vertical water distribution point of the treater is 0.3-0.8 m higher than the bottom, and the vertical space between the water distribution surface and the bottom of the cavity is a sludge gravity concentration and anaerobic digestion area.
Preferably, the vertical water distribution of the treater is provided with a certain water outlet head with the value of 0.2-1.0 m, so that the upward flow trend of sewage is increased, and the mixing effect of sewage in an anoxic zone at the lower part of the cavity is improved.
Preferably, the aerobic filler module of the processor is of a vertical structure and is arranged at the middle upper part of the cavity, and the distance between the top surface of the filler module and the water surface in the cavity is 0-1.0 m.
Preferably, the aerobic filler module of the processor is arranged as an independent monomer, the height of the monomer is not less than 0.5m, and the distance between every two monomers is 0-1.0 m.
Preferably, the aerobic filler module of the processor is connected with a bearing beam on the water surface of the cavity through a traction rope, the outer ring of the bearing beam wraps the floating body, and the traction rope is vertically retracted to adjust the vertical position of the filler module.
Preferably, the aerobic filler module is filled with a microorganism attachment base and is arranged by one or two of polymer elastic fillers (hydroformylation fiber rings and hydroformylation fiber bundles) and suspension ball fillers.
Preferably, the aerobic filler module is connected with the aeration pipe through an aerator to enter the filler module for aeration, the aeration amount of different monomer filler modules is controllable, and the concentration of dissolved oxygen in the filler module is 1-3 mg/L.
Preferably, the cavity of the processor is arranged into a deep pool structure, the effective water depth is 1.0-2.5 m, the volume of the cavity is 1-3 times of the water treatment volume in one day, and the stability of the environment of each horizontal and vertical anoxic/aerobic reaction zone is ensured.
Preferably, floating plants are planted on the water surface in the processor, the floating plants are more than one of water spinach, water cress, poly grass and the like, and the plants purify sewage and absorb odor generated by biological reaction.
Preferably, the treater is not provided with a nitrifying liquid reflux system, and the high-concentration nitrifying liquid generated in the aerobic zone directly enters the next-stage anoxic zone along with plug flow in the lateral direction on one hand, and can also settle to the lower anoxic zone along with gravity on the other hand.
Due to the adoption of the technical scheme, the beneficial effects obtained by the invention at least comprise: according to the multi-stage anoxic-aerobic process and the multi-stage anoxic-aerobic processor based on the multidirectional water inflow mode, the multi-stage anoxic/aerobic reaction zone is formed in the lateral direction through the optimized adjustment of the water inflow direction and the aeration strength, and the multi-stage anoxic/aerobic reaction zone can be relatively divided into the anaerobic/anoxic/aerobic reaction zone along the vertical direction from bottom to top. Compared with the traditional biological denitrification treatment, the treatment device cancels a nitrifying liquid reflux system, and on one hand, the high-concentration nitrifying liquid generated in the aerobic zone directly enters the next stage anoxic zone along with plug flow in the lateral direction, and on the other hand, the high-concentration nitrifying liquid can be settled in the lower anoxic zone along with gravity. Meanwhile, sewage flows upwards to bring a better mixing effect, and raw water of the sewage provides a carbon source for denitrification reaction in the anoxic zone, so that the biological denitrification efficiency is improved. This treater is integrated device, and inside comprises modular unit, the installation and dismantlement of being convenient for, sewage process this treater, under the common purification effect of activated sludge and biomembrane, pollutants such as nitrogen phosphorus effectively cut down.
Drawings
FIG. 1 is a sectional view of a multi-stage anoxic-aerobic process and treatment apparatus based on multi-directional water feeding and a preferred embodiment of the present invention.
FIG. 2 is a functional block diagram of a preferred embodiment of the multi-stage anoxic-aerobic process and treatment apparatus based on multi-directional water inflow.
Reference numerals: 1-a processor cavity; 2-lateral water distribution area; 3-vertical water distribution area; 4-aerobic filler module; 5-aeration point; 6-a traction rope; 7-aeration machine; 8-an aeration pipe; 9-bearing beam; 10-floating plants; 11-water collecting area;
a1-anaerobic zone; a2-anoxic zone; o-aerobic zone.
Detailed Description
The invention is further described with reference to the following figures and examples.
Referring to fig. 1, an embodiment of the present invention includes:
a multi-stage anoxic-aerobic process and a processor based on a multi-directional water inlet mode comprise: the integrated frame structure comprises a processor cavity 1, a lateral water distribution area 2, a vertical water distribution area 3, an aerobic filler module 4, an aeration point 5 in the filler module, a traction rope 6, an aerator 7, an aeration pipe 8, a bearing beam 9, a floating plant 10 and a water collection area 11.
The multi-directional water inflow of the processor is not limited to the lateral direction and the vertical direction, the water inflow distribution is adjusted and optimized according to the property of the sewage to be treated, and the ratio of the lateral water inflow to the vertical water inflow is (4:6) - (7: 3); the amount of carbon source organic matters in raw water is mainly treated by lateral and vertical water inflow distribution, and water is directly fed into the anoxic zone in the vertical direction, so that the organic matters in the raw water can be used as a denitrification reaction carbon source, and the denitrification efficiency is improved. When BOD/TKN in the raw water is less than 3, the vertical water inflow is increased, the ratio of the lateral water inflow to the vertical water inflow is 4:6, and if the ratio is continuously increased, the COD content of the discharged water can be increased, so that the water quality is not up to the standard. When BOD/TKN is more than 8, the ratio of the lateral water inflow to the vertical water inflow is not more than 7:3 at most, otherwise, the nitrification reaction is insufficient.
The lateral water distribution area of the treater accounts for 1/3-3/4 of the total lateral area, and the vertical water distribution area accounts for 1/4-3/4 of the total bottom area; the lateral and vertical water distribution areas are related to the water inflow, the water inflow is lower than 2 square/day, the lateral and vertical water distribution areas are 1/3 and 1/4 respectively, and the lateral and vertical water distribution areas are not suitable to be larger than 3/4 to ensure the rigidity and strength of the device.
The vertical minimum height is set to ensure that the water distribution point is not easily covered by sludge and further causes blockage, and the vertical distance from the bottom is required to ensure that sufficient sludge storage space is reserved without influencing the function distribution in the vertical direction; preferably, the vertical water distribution point of the treater is 0.3-0.8 m higher than the bottom, and the vertical space between the water distribution surface and the bottom of the cavity is a sludge gravity concentration and anaerobic digestion area.
The vertical water distribution area 3 of treater sets up certain delivery head, and delivery head designs according to the pond is dark, needs to avoid delivery head too big to cause the destruction of anoxic zone and aerobic zone environment, and preferred 0.2 ~ 1.0m increases the upward current trend of sewage and improves the mixed effect of cavity lower part anoxic zone sewage.
The aerobic filler module of the processor is of a vertical structure and is arranged at the middle upper part of the cavity, and preferably, the distance between the top surface of the filler module 4 and the water surface in the cavity is 0-1.0 m.
The aerobic filler module 4 of the processor is arranged as an independent monomer, preferably, the height of the monomer is not less than 0.5m, and the distance between every two monomers is 0-1.0 m.
The processor filler module 4 is fixedly connected with the bearing beam 9 through the traction rope 6, the aerobic filler module 4 is kept in a suspended state in the water body, and the traction rope 6 is vertically retracted to adjust the vertical position of the aerobic filler module 4.
The aerobic filler module 4 of the processor is filled with microorganism attachment base and is arranged by one or two of macromolecule elastic filler (hydroformylation fiber ring and hydroformylation fiber bundle) and suspension ball filler.
The aerobic filler module 4 is connected with an aeration pipe 8 through an aerator 7 and enters an aeration point 5 in the filler module, the aeration amount of different monomer aerobic filler modules 4 is controllable, and preferably, the concentration of internal dissolved oxygen is 1-3 mg/L.
The cavity 1 of the processor is arranged into a deep pool structure, so that the environment stability of each horizontal and vertical anoxic/aerobic reaction zone is ensured, preferably, the effective water depth is 1.0-2.5 m, and the volume of the cavity is 1-3 times of the water treatment volume in one day.
The floating plants 10 are planted on the sewage surface in the processor, preferably more than one of water spinach, water fennel, poly grass and the like, the sewage is directly purified by the plants, and odor generated by biological reaction is absorbed by the plants.
Referring to fig. 2, an embodiment of the invention includes:
a multi-stage anoxic/aerobic process and a processor based on a multi-directional water inlet mode are disclosed, wherein a multi-stage anoxic/aerobic reaction zone is formed in the lateral direction through optimization and adjustment of water inlet dimension and aeration strength, and the multi-stage anoxic/aerobic reaction zone can be relatively divided into an anaerobic/anoxic/aerobic reaction zone along the vertical direction from bottom to top.
Preferably, the lateral upper aerobic filler module area is an aerobic area O, the non-aeration area is a relative anoxic area A2, and the lateral upper aerobic filler module area and the non-aeration area are continuously and discontinuously distributed along the plug flow direction; in the plug flow direction, the water flow direction, in this embodiment, the cross flow direction, is shown.
Preferably, the anaerobic zone A1, the anoxic zone A2 and the aerobic zone O are arranged in sequence from the bottom to the top in the vertical direction.
Preferably, the anaerobic zone A1 is arranged from the bottom of the cavity of the treater to the vertical water distribution zone and mainly used for sludge digestion volume reduction treatment, the vertical anoxic zone A2 mainly used for denitrification and denitrogenation reaction, and the aerobic zone O at the middle upper part mainly used for organic matter degradation and nitration reaction.
Preferably, the processor is not provided with a nitrifying liquid reflux system, and the high-concentration nitrifying liquid generated in the aerobic zone O directly enters the next stage anoxic zone A2 along with plug flow in the lateral direction on one hand and can also settle to the lower anoxic zone A1 along with gravity on the other hand.
In this example, domestic sewage was used for the test, the length, width, height, 1.9m, 1.0m, and the water inflow was 1.5m3And d. The continuous test result shows that the water quality COD of the inlet water is 120-240 mg/L, TN is 45-70 mg/L, the system stably runs for 3 months (14-25 ℃) at room temperature, and the average concentration of the COD of the outlet water of the system is less than 40.92 +/-5.06 mg/L. The average concentration of TN is less than 10.28 +/-2.06 mg/L.
In conclusion, the invention discloses a multi-stage anoxic-aerobic process and a multi-stage anoxic-aerobic processor based on a multidirectional water inlet mode, wherein the water inlet mode is a multi-dimensional mode, the process is not limited to the lateral and vertical directions, a large amount of activated sludge is added into the water inlet mode, aerobic functional filler modules are arranged on the middle upper part of the processor in a sectional and partitioned mode, and aeration heads are arranged in the aerobic functional filler modules to ensure the immobilized growth of aerobic microorganisms and nitrobacteria on the filler. Through the optimization and adjustment of the water inlet dimension and the aeration intensity, a multi-stage anoxic/aerobic reaction zone is formed in the lateral direction and can be relatively divided into an anaerobic/anoxic/aerobic reaction zone from bottom to top along the vertical direction. Compared with the traditional biological denitrification treatment, the treatment device cancels a nitrifying liquid reflux system, and on one hand, the high-concentration nitrifying liquid generated in the aerobic zone directly enters the next stage anoxic zone along with plug flow in the lateral direction, and on the other hand, the high-concentration nitrifying liquid can be settled in the lower anoxic zone along with gravity. Meanwhile, sewage flows upwards to bring a better mixing effect, and raw water of the sewage provides a carbon source for denitrification reaction in the anoxic zone, so that the biological denitrification efficiency is improved. Through the way, the multi-stage anoxic-aerobic process based on the multidirectional water inflow mode and the processor are integrated, the interior of the integrated device is composed of the module units, the installation and the disassembly are convenient, pollutants such as nitrogen, phosphorus and the like can be effectively reduced under the combined action of activated sludge and a biological membrane when sewage passes through the processor, and effluent is directly discharged or enters a next-stage treatment system after being collected by a water collecting area.
The foregoing description and description of the embodiments are provided to facilitate understanding and application of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications can be made to these teachings and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above description and the description of the embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (15)
1. A multi-stage anoxic-aerobic process method is characterized in that water is fed in a multi-dimensional mode including a lateral mode, a vertical mode and other directions; activated sludge is added into the filler, so that aerobic microorganisms and nitrobacteria are immobilized and grow on the filler; through the optimization and adjustment of the water inlet dimension and the aeration intensity, a multi-stage anoxic/aerobic reaction zone is formed in the lateral direction and can be relatively divided into an anaerobic/anoxic/aerobic reaction zone from bottom to top along the vertical direction.
2. The multi-stage anoxic-aerobic process according to claim 1, characterized in that: the middle upper part is provided with an aerobic functional filler module in a sectional and partitioned manner, and aeration is carried out in the aerobic functional filler module.
3. The multi-stage anoxic-aerobic process according to claim 1, characterized in that: the high-concentration nitrifying liquid generated in the aerobic zone directly enters the next-stage anoxic zone along with plug flow in the lateral direction on one hand, and can be settled in the lower anoxic zone along with gravity on the other hand.
4. The multi-stage anoxic-aerobic process according to claim 1, characterized in that: so that the sewage flows upwards to promote mixing, and raw water of the sewage provides a carbon source for denitrification reaction in the anoxic zone so as to improve the biological denitrification efficiency.
5. The multi-stage anoxic-aerobic process according to claim 1, characterized in that: the water inflow distribution is adjusted according to the property of the sewage to be treated, and the distribution ratio of the lateral water inflow to the vertical water inflow is (4:6) - (7: 3); preferably, the lateral water distribution area accounts for 1/3-3/4 of the total lateral area, and the vertical water distribution area accounts for 1/4-3/4 of the total bottom area.
6. The multi-stage anoxic-aerobic process according to claim 1, characterized in that: the vertical space between the water distribution surface of the vertical water distribution and the bottom of the cavity is a sludge gravity concentration and anaerobic digestion area, the vertical lowest height is arranged to ensure that the water distribution point is not easy to be covered by sludge to cause blockage, and the vertical distance from the bottom is required to ensure that sufficient sludge storage space is reserved, so that the vertical function distribution is not influenced; preferably, the vertical water distribution point is 0.3-0.8 m higher than the bottom.
7. The multi-stage anoxic-aerobic process according to claim 1, characterized in that: the vertical water distribution is provided with a certain water outlet head, so that the upward flow trend of sewage is increased, the mixing effect of sewage in the anoxic zone at the lower part of the cavity is improved, and the damage to the environments of the anoxic zone and the aerobic zone caused by the overlarge water outlet head is avoided; preferably, the water outlet head is 0.2-1.0 m.
8. The multi-stage anoxic-aerobic process according to claim 2, characterized in that: the aerobic filler module is of a vertical structure, is arranged at the middle upper part of the cavity, keeps a suspended state in the cavity and is arranged as an independent monomer; preferably, the distance between the top surface of the filler module and the water surface in the cavity is 0-1.0 m; the height of the monomers is not less than 0.5m, and the distance between every two monomers is 0-1.0 m; preferably, the aerobic filler module is filled with a microorganism attachment base and is arranged by combining one or two of polymer elastic filler and suspension ball filler; preferably, the aeration quantity of the aerobic functional filler modules of different monomers is controllable, and the concentration of dissolved oxygen inside the aerobic functional filler modules is 1-3 mg/L.
9. The multi-stage anoxic-aerobic process according to claim 1, characterized in that: the treatment system is arranged into a deep pool structure, the effective water depth is 1.0-2.5 m, and the volume of the treatment system is 1-3 times of the water treatment volume in one day; preferably, floating plants are planted on the water surface in the treatment system, and the sewage is purified by the plants and odor generated by biological reaction is absorbed; preferably, the floating plant is more than one of water spinach, cress and agropyron.
10. A multi-stage anoxic-aerobic processor for carrying out the multi-stage anoxic-aerobic process according to claim 1, comprising: the device comprises a processor cavity, a water distribution device and a control device, wherein the processor cavity is provided with a lateral water distribution area, a vertical water distribution area and an aerobic filler module; the aerobic filler module is arranged at the middle upper part of the cavity; the effluent is collected by the water collecting area and then discharged or enters a next-stage treatment system.
11. The multi-stage anoxic-aerobic processor according to claim 10, wherein: the aerobic filler module is fixed with the bearing beam through a traction rope; and/or an aeration head is arranged in the aerobic filler module.
12. The multi-stage anoxic-aerobic processor according to claim 10, wherein: the proportion of the lateral water inflow to the vertical water inflow is (4:6) - (7: 3); preferably, the lateral water distribution area accounts for 1/3-3/4 of the total lateral area, and the vertical water distribution area accounts for 1/4-3/4 of the total bottom area; preferably, the vertical water distribution point is 0.3-0.8 m higher than the bottom; preferably, the vertical water distribution is provided with a water outlet head of 0.2-1.0 m.
13. The multi-stage anoxic-aerobic processor according to claim 10, wherein: the aerobic filler module is of a vertical structure, is arranged at the middle upper part of the cavity, keeps a suspended state in the cavity and is arranged as an independent monomer; preferably, the distance between the top surface of the filler module and the water surface in the cavity is 0-1.0 m; the height of the monomers is not less than 0.5m, and the distance between every two monomers is 0-1.0 m; preferably, the aerobic filler module is connected with a bearing beam on the water surface of the cavity through a traction rope, and the outer ring of the bearing beam wraps the floating body; preferably, the aerobic filler module is filled with a microorganism attachment base and is arranged by combining one or two of polymer elastic filler and suspension ball filler; preferably, the aerobic filler module is connected with the aeration pipe through an aerator to enter the filler module for aeration, the aeration amount of different monomer filler modules is controllable, and the concentration of dissolved oxygen in the filler module is 1-3 mg/L.
14. The multi-stage anoxic-aerobic processor according to claim 10, wherein: the treater cavity sets up to deep pool structure, and effective depth of water is 1.0 ~ 2.5m, and its volume is 1 ~ 3 times of the water yield of handling one day.
15. The multi-stage anoxic-aerobic processor according to claim 10, wherein: floating plants are planted on the water surface in the inner cavity of the processor, and the floating plants are more than one of water spinach, cress and grass gathering.
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| CN114735820A (en) * | 2022-03-09 | 2022-07-12 | 安徽中环环保科技股份有限公司 | Multistage A/O (anoxic/oxic) series batch water inlet type low-carbon source sewage denitrification device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114735820A (en) * | 2022-03-09 | 2022-07-12 | 安徽中环环保科技股份有限公司 | Multistage A/O (anoxic/oxic) series batch water inlet type low-carbon source sewage denitrification device and method |
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