CN109485201A - A kind for the treatment of process and device for city domestic sewage multistage A/O combined denitrification dephosphorization - Google Patents
A kind for the treatment of process and device for city domestic sewage multistage A/O combined denitrification dephosphorization Download PDFInfo
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- CN109485201A CN109485201A CN201710810660.XA CN201710810660A CN109485201A CN 109485201 A CN109485201 A CN 109485201A CN 201710810660 A CN201710810660 A CN 201710810660A CN 109485201 A CN109485201 A CN 109485201A
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- 239000010865 sewage Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000008569 process Effects 0.000 title claims abstract description 31
- 238000011282 treatment Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 27
- 239000010802 sludge Substances 0.000 claims abstract description 27
- 238000005273 aeration Methods 0.000 claims abstract description 15
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 230000011218 segmentation Effects 0.000 claims abstract description 5
- 230000008859 change Effects 0.000 claims abstract description 4
- 230000006978 adaptation Effects 0.000 claims abstract 2
- 230000000694 effects Effects 0.000 claims description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims description 11
- 239000011574 phosphorus Substances 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 11
- 241000894006 Bacteria Species 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 229920000388 Polyphosphate Polymers 0.000 claims description 5
- 229920000037 Polyproline Polymers 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001205 polyphosphate Substances 0.000 claims description 5
- 235000011176 polyphosphates Nutrition 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000009395 breeding Methods 0.000 claims 1
- 230000001488 breeding effect Effects 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 claims 1
- 238000007781 pre-processing Methods 0.000 claims 1
- 239000013589 supplement Substances 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000035755 proliferation Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009293 extended aeration Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- TVHALOSDPLTTSR-UHFFFAOYSA-H hexasodium;[oxido-[oxido(phosphonatooxy)phosphoryl]oxyphosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O TVHALOSDPLTTSR-UHFFFAOYSA-H 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 238000011369 optimal treatment Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
-
- 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
-
- 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
- C02F2101/30—Organic compounds
-
- 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
-
- 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
-
- 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
- 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
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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 present invention relates to a kind for the treatment of process and device for city domestic sewage multistage A/O combined denitrification dephosphorization, specifically disclose a kind for the treatment of process for handling city domestic sewage.It mainly include pretreatment system, segmental influent system, dephosphorization system, denitrification system, return-flow system, carbon source plus system.Sanitary sewage segmentation after pretreatment enters in denitrification dephosphorization system, carbon is removed by level-one anoxic, anaerobism, the aerobic progress dephosphorization of level-one, it enters back by the aerobic denitrification system constituted of second level anoxic and second level, pool bottom is connected to and covers membrane module, interval aeration reaches unpowered interior circulation, completes denitrogenation.Advantages of the present invention: 1, the denitrification dephosphorization system after optimizing reinforces denitrogenation dephosphorizing, removes carbon efficiencies；2, membrane module not only improves effluent quality, and saves the disposition of sludge；3, the unpowered interior circulation formed reduces power-equipment investment, and expense is effectively reduced；4, can flexible modulation multistage flooding parameter to reach adaptation change of water quality.
Description
Technical field
The invention patent relates to a kind of city domestic sewage treatment process, especially a kind of multistage for city domestic sewage
The treatment process of A/O combined denitrification dephosphorization.
Background technique
Currently, having traditional activated sludge process, biofilm, UF membrane skill for city domestic sewage processing technique to be common
Art:
Traditional active sludge is continuously mixed to sewage and various micropopulations, shape under artificial aerobic condition
Viability sludge.Using the biological flocculation and precipitation of activated sludge, absorption and oxidation, to decompose the organic contamination in removal sewage
Then object is separated from water sludge, most of activated sludge flows back into aeration tank, redundance then discharge system.Common biography
System activated sludge process and its deformation have: AB, SBR, oxidation ditch, common aeration, A2/O、A/O。
Biofilm is another biological treatment arranged side by side with traditional active sludge, divides aerobic biological film method and anaerobic organism film
Method two types.It is acted on by the biomembrane being attached on filler (or filtrate, carrier), under conditions of aerobic or anaerobism,
Organic material in degradation sewage, makes sewage be purified.Common biofilm and its deformation has: biological aerated filter,
Biological rotating disk, biological contact oxidation process, biological fluidized bed.
Membrane separation technique is usually combined with biological treatment, i.e., so-called MBR membrane bioreactor, biological treatment generally includes to detest
Oxygen pond, anoxic pond, aerobic tank, aerobic tank increase membrane module, by UF membrane replace sedimentation basin mud-water separation, sludge with can
Insoluble macromolecular compound is trapped by film back in bioreactor, thus when the stop of active microorganism can be improved
Between, be conducive to the degradation to compound, while eliminating sludge bulking.
Processing city domestic sewage treatment process has the following deficiencies: at this stage
1, can not realize good energy-saving effect: traditional sewage treatment process can not only realize the efficient of sewage treatment
Property, and a large amount of energy can be expended during handling sewage.It is usually to pass through in the treatment process to sanitary sewage
The anaerobic effect of sludge, to be utilized again to the energy in sewage.Simultaneously sewage cannot be completed using system natural power
Processing, cannot save the investment of power-equipment type and quantity.
2, sewage treatment process at this stage cannot meet the demand of sustainable development: at this stage, China is to sewage
It during reason, is usually handled by the way of extended aeration, this treatment process falls behind relatively, in the process of application
In can not realize the effective use of water resource, greatly hinder sewage treatment
Sustainable development.
3, cannot reach the optimum efficiency of denitrogenation dephosphorizing simultaneously: during traditional sewage denitrification and dephosphorization, there is biological denitrificaions
With Biological Phosphorus Removal Process in the conflicting of water conservancy residence time and sludge sludge age, so that there are shifting passes for denitrogenation dephosphorizing
System, cannot reach optimal treatment effect simultaneously.In terms of carbon source, the proliferation of denitrifying bacterium is clearly sent out with the proliferation of polyP bacteria
Raw competition.
It is difficult to meet high standard water outlet requirement: as country requires increasingly strict, the water outlet of town sewage to water pollution control
Water quality proposes the discharge standard that mark transformation meets level-one A table from from level-one B mark, and provincial standard is promulgated in many places, to effluent quality
It is harsher, or even to reach surface water classClass water requires (except total nitrogen).Traditional technique be no longer satisfied it is up to standard go out
The requirement of water.
Summary of the invention
To solve city domestic sewage processing, energy consumption is high, water resource cannot be reached simultaneously most using insufficient, denitrogenation dephosphorizing
Good, effluent quality is difficult to the problems such as reaching high standards, and the present invention provides one kind to be used for city domestic sewage multistage A/O group
Close the treatment process of denitrogenation dephosphorizing.
The invention patent solves technical solution used by its technical problem: the technique mainly include pretreatment system,
Segmental influent system, dephosphorization system, denitrification system, return-flow system, carbon source plus system.It is pretreated through grid and setting pot
Sanitary sewage segmentation enters in denitrification dephosphorization system, successively reaches by the aerobic biochemical treatment of level-one anoxic, anaerobism, level-one
Removal to phosphorus and carbon source is entered back by the aerobic denitrification system constituted of second level anoxic and second level, pool bottom is connected to simultaneously
Membrane module is covered, interval aeration reaches unpowered interior circulation, completes denitrification functions.Sludge is passed straight back to level-one from denitrification system
Anoxic, while to guarantee that denitrification goes on smoothly setting carbon source plus system.Whole system is completed multistage only with 1 reflux pump
The backflow functionality of A/O.
The segmental influent system that the invention patent uses is controlled using instrument monitoring and automatic valve, to segmental influent ratio
And sludge back flow quantity carries out automatically controlling.When membrane cisterna denitrogenation processing carbon source deficiency, adjustment back segment inflow is automatically controlled, simultaneously
Increase regurgitant volume, maintains the balance of entire carbon and nitrogen removal system；When being discharged phosphor-removing effect difference, raising chemical dephosphorization dosage,
Sludge volume.
The dephosphorization system of the invention patent adds dephosphorization in such a way that chemistry and biological phosphate-eliminating combine in setting pot
Medicament, and stir sufficiently, reach the pretreatment to phosphorus, can be used as strengthening measure when biological phosphate-eliminating cannot be met the requirements.Biology
Level-one anoxic, while the mode that anaerobism and aerobic section are connected directly are set in leading portion in dephosphorization, preposition anoxic can preferentially meet micro-
Requirement of the biological denitrificaion to carbon source, denitrification sufficiently can avoid influence of the nitrate to dephosphorization in returned sludge and raw water afterwards,
Improve postorder biological phosphate-eliminating efficiency.Entering anaerobic pond by denitrifying sewage, polyP bacteria forms dominant bacteria in anaerobic pond,
The main body for constituting active pollution index, absorbs the organic matter of molecule, the phosphorus water that will be store in Quadrafos (Poly-p) in cell body
Solution is decomposed, and energy is provided.It is directly entered the higher aerobic environment of biochemical efficiency after polyP bacteria anaerobic phosphorus release, can more make full use of
" the hungry effect " formed under anaerobic absorbs the more phosphorus discharged than anaerobic condition, quantitatively from sewage
Phosphorus amount needed for being synthesized considerably beyond its cell, from achieving the purpose that dephosphorization.The microorganism for participating in dephosphorization all experienced completely
Anaerobicaerobic process has " population effect ", enhances system dephosphorization ability.
The denitrification system setting second level anoxic pond and second level aerobic tank of the invention patent, two lattice arrange membrane module and bottom connects
Logical, the alternative aeration operation in 2 ~ 3 hours of setting autocontrol valve interval is realized and is followed in unpowered to reach anoxic, aerobic state
Ring can save traditional handicraft second level reflux pump.Pollutant in sewage is degraded in aerobic membrane cisterna first, water and be less than fenestra
The small molecule of diameter dissolves material permeance film, sewage anoxic and it is aerobic alternately and repeatedly in reach removal to nitrogen.In anoxic shape
Returned sludge when state, reflux ratio is 50% ~ 400%, to guarantee that denitrification is gone on smoothly, the supplementary carbon source in anaerobic condition, and carbon
Source can be methanol or sodium acetate etc..
The return-flow system of the invention patent only with 1 reflux pump, second level anoxic and second level it is aerobic between reflux can lead to
It crosses aeration and has the function that interior circulation and stirring, the sludge of anaerobic condition flow back into preposition level-one anoxic by 1 reflux pump
The return-flow system is realized automatic control by configuring electrically operated valve and flowmeter by pond.
The invention patent the utility model has the advantages that the 1, treatment process according to influent quality will water inlet segmentation enter each technique
Section, solves the contradiction of denitrogenation dephosphorizing feature micropopulation growth characteristics, enhances the adaptability to change of water quality；2, the place
Science and engineering skill is the processing mode that traditional single creature dephosphorization mode is changed to biology and is combined with chemistry, improves phosphor-removing effect；
3, the treatment process is that traditional preposition denitrogenation only being considered to, carbon source is insufficient, does not consider that operation is convenient, is changed to i.e. while considering
Carbon resource shortage problem, and run easy, energy saving interior circulation；4, the treatment process omits traditional secondary settling tank,
Second level anoxic pond and second level aerobic tank, which increase membrane module, can substantially reduce the discharge of sludge, simplify the subsequent place of traditional sludge
It sets；5, the carbon source plus system that the treatment process provides can avoid reducing denitrogenation dephosphorizing effect because of primary sewage carbon source deficiency living
Fruit ensures that water outlet requires.
Detailed description of the invention
Fig. 1 is the invention patent technical process figure
Fig. 2 is the invention patent main processing units detail drawing
Fig. 3 is the main sewage flow graph of the invention patent
Fig. 4 is circular flow figure in the main A/O of the invention patent
In the figure, it is marked as 1-grid pond, 2-coarse racks, 3-fine facks, 4-elevator pumps, 5-setting pots, 6-PAM dosings dress
It sets, 7-PAC chemicals dosing plants, 8-level-one anoxic ponds, 9-anaerobic ponds, 10-blender 11-level-one aerobic tanks, 12-second levels
Anoxic pond, 13-additional carbons, 14-second level aerobic tanks, 15-membrane modules, 16-blowers, 17-clear water reserviors, 18-aeration plates,
19-reflux pumps, 20-segmental influents, 21-return-flow systems, 22-suction pumps, 23-stand reflux, 24-aeration overflows.
Specific embodiment
The invention patent is further illustrated with reference to the accompanying drawing.
As shown in Figure 1, the present invention includes pre- place for the treatment process of city domestic sewage multistage A/O combined denitrification dephosphorization
Reason system (1,5), segmental influent system (20), dephosphorization system (6,7,8,9,11), denitrification system (12,14), return-flow system
(21), carbon source plus system (13) and pipe-line system.
Sewage segmentation after grid pond (1) and setting pot (5) pretreatment enters bio-reaction zone, level-one anoxic pond
(8) than being 50% ~ 80%, second level anoxic pond (12) or second level aerobic tank (14) 20% ~ 50%, back segment water inlet are into scarce for water inlet
The pond body of oxygen condition, i.e. standing region.Level-one anoxic pond (8) is connected to anaerobic pond (9) bottom, and sewage is entered by bottom hole
To anaerobic zone, from anaerobic pond (9) to second level anoxic pond (12), sewage is flowed by overflow, and second level anoxic pond (12) and second level are good
Sewage in oxygen pond (14) reaches interior circulation by aeration, and the method for operation is that interval is aerated for 2 ~ 3 hours, stands area and is in anoxic
State carries out denitrification, and aeration zone is in aerobic state, carries out nitration reaction and the removal to organic pollutant, exposes simultaneously
Gas rises liquid, carries out denitrification denitrogenation to anoxic zone by the way that overflow is reflowable, to guarantee denitrification process to carbon source
Carbon source is added to it in time in enough intakes.In the conversion process of interval aeration, sewage constantly undergoes the alternating of anaerobic-aerobic
State, strengthened denitrification with remove carbon efficiencies.In second level anoxic pond (12) and second level aerobic tank (14) bottom, electrically operated valve is set, so that
In the sludge reflux of anaerobic condition to level-one anoxic pond (8), reflux ratio 50% ~ 400%, numerical value is according to the operation conditions of water quality
It is adjusted.Purified water is drawn into clear water reserviors (17) using suction pump (22) from aeration zone.When effluent quality is not able to satisfy
To the index of phosphorus, Dephosphorization reagent can be added in setting pot (5), ensure standard water discharge discharge.
Claims (5)
1. a kind for the treatment of process for city domestic sewage multistage A/O combined denitrification dephosphorization, which mainly includes pre-
Processing system, segmental influent system, dephosphorization system, denitrification system, return-flow system, carbon source plus system；Through grid and setting pot
Pretreated sanitary sewage segmentation enters in denitrification dephosphorization system, successively the life aerobic by level-one anoxic, anaerobism, level-one
Change processing reaches removal to phosphorus and carbon source, enters back by the aerobic denitrification system constituted of second level anoxic and second level, pond body
Bottom is connected to and covers membrane module, and interval aeration reaches unpowered interior circulation, completes denitrification functions；Sludge is direct from denitrification system
Level-one anoxic is flowed back into, while to guarantee that denitrification goes on smoothly setting carbon source plus system；Whole system flows back only with 1
Pump completes the backflow functionality of multistage A/O.
2. a kind for the treatment of process for city domestic sewage multistage A/O combined denitrification dephosphorization according to claim 1,
Be characterized in that: the pretreatment system (1,5) combines chemical dephosphorization (6,7) miscellaneous function, is placed in the pre- place of setting pot (5) enhancing
Phosphorus removal functional is managed, provides good environment for biological phosphate-eliminating.
3. a kind for the treatment of process for city domestic sewage multistage A/O combined denitrification dephosphorization according to claim 1,
Be characterized in that: the segmental influent system (20) uses multipoint water feeding, and water inlet respectively enters level-one anoxic (8), second level lacks
Oxygen (12) or second level are aerobic (14), can avoid leading to second level anoxic because anaerobism (9), aerobic (11) the section carbon source consumption of level-one are excessive
(12) section carbon source is insufficient, reduces denitrification efficiency, at the same can flexible modulation multi-section water-inlet parameter to reach adaptation change of water quality；Into
Water is than level-one anoxic (8) 50% ~ 80%, second level anoxic (12) or second level aerobic (14) 20% ~ 50%.
4. a kind for the treatment of process for city domestic sewage multistage A/O combined denitrification dephosphorization according to claim 1,
Be characterized in that: preposition level-one anoxic (8) the removal water inlet of the dephosphorization system (6,7,8,9,11) is with the nitrate that flows back to gathering below
Water inlet larger molecular organics are resolved into part VFA, remove part carbon source, be conducive to anaerobism section by the negative effect of phosphorus bacterium dephosphorization
(9) the synthesis breeding of polyP bacteria, improves dephosphorization efficiency；Anaerobism (9) is connected directly with level-one aerobic (11) simultaneously, utilizes polyP bacteria
" hungry effect ", can be improved phosphor-removing effect；PAM chemicals dosing plant can be utilized when only better effects cannot be reached by biological phosphate-eliminating
(6) it is pre-processed with sewage of the PAC chemicals dosing plant (7) in the setting pot stage；According to influent quality can level-one anoxic (8),
Anaerobic pond (9), level-one aerobic tank (11) addition filler (fixed filler, granular filler), improve load, to meet more maximum discharge mark
It is quasi-.
5. a kind for the treatment of process for city domestic sewage multistage A/O combined denitrification dephosphorization according to claim 1,
Be characterized in that: denitrification system (12,14) setting second level anoxic pond (12) and second level aerobic tank (14), two lattice arrange membrane module
And bottom is connected to, and is spaced alternative aeration operation in 2 ~ 3 hours to reach anoxic, aerobic state, is realized unpowered interior circulation, strengthen de-
Nitrogen and removal to organic matter；By electrically operated valve realize automatically control aeration zone water outlet, stand area water inlet, carbon source supplement and
Sludge reflux, return sludge ratio 50% ~ 400%, and periodically exclude excess sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710810660.XA CN109485201A (en) | 2017-09-11 | 2017-09-11 | A kind for the treatment of process and device for city domestic sewage multistage A/O combined denitrification dephosphorization |
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| CN111410381A (en) * | 2020-05-08 | 2020-07-14 | 河北雄安卫道夫环保科技有限公司 | Multistage biological sewage treatment plant |
| CN111573997A (en) * | 2020-06-10 | 2020-08-25 | 江西中膜环境技术有限公司 | Integrated sewage treatment device |
| CN111573994A (en) * | 2020-06-04 | 2020-08-25 | 北控水务(中国)投资有限公司 | Town sewage treatment system of three kinds of water of surface of earth up to standard |
| CN112340947A (en) * | 2020-11-19 | 2021-02-09 | 海天水务集团股份公司 | Sewage nitrogen and phosphorus removal adjusting system and adjusting method thereof |
| CN113860650A (en) * | 2021-10-26 | 2021-12-31 | 宁波中车时代电气设备有限公司 | Ship sewage treatment system |
| CN114477450A (en) * | 2022-02-25 | 2022-05-13 | 新疆德安环保科技股份有限公司 | Enhanced domestic sewage nitrogen and phosphorus removal treatment device and treatment method |
| CN115215439A (en) * | 2022-08-19 | 2022-10-21 | 中建生态环境集团有限公司 | Sewage deep denitrification device based on two-stage AO double-reflux process and operation method |
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| CN115215439A (en) * | 2022-08-19 | 2022-10-21 | 中建生态环境集团有限公司 | Sewage deep denitrification device based on two-stage AO double-reflux process and operation method |
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