CN106986453A - A kind of multipoint water feeding improvement A2/O denitrification process and A2/O ponds - Google Patents
A kind of multipoint water feeding improvement A2/O denitrification process and A2/O ponds Download PDFInfo
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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
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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
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
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- 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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- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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
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- 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
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- 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
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/16—Total nitrogen (tkN-N)
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Abstract
The invention discloses a kind of multipoint water feeding improvement A2/O denitrification process and A2/O ponds, its drip irrigation device is a kind of A2/O ponds, including：It is connected with mixing pit, mixing pit and is provided with coarse rack well outside sewage pipe and factory in sewage pipe, mixing pit for being passed through in the factory of sewage；Pre- anoxic pond, is provided with the mozzle for sewage flow between pre- anoxic pond and mixing pit；Anaerobic pond, anaerobic pond is connected by water hole hole with pre- anoxic pond；First anoxic pond, the first anoxic pond is connected by water hole hole with anaerobic pond；Second anoxic pond, the second anoxic pond is connected by water hole hole with the first anoxic pond；3rd anoxic pond, the 3rd anoxic pond is connected by water hole hole with the second anoxic pond；First Aerobic Pond, the first Aerobic Pond is connected by water hole hole with the 3rd anoxic pond；Second Aerobic Pond, the second Aerobic Pond is connected by water hole hole with the first Aerobic Pond.Denitrification can be effectively ensured, and the phosphor-removing effect in system is also guaranteed.
Description
Technical field
The present invention relates to sewage treatment process, more particularly to a kind of multipoint water feeding improvement A2/O denitrification process and A2/O
Pond.
Background technology
With the generalization for the increasingly strict and sewage low-carbon source feature that China is required denitrogenation dephosphorizing, to most of dirts
For water treatment plant, all suffer from processing water outlet in nitrogen, phosphorus it is not up to standard and have to upgrading the problem of.Although current sewage
Denitrification dephosphorization technique technology is a lot, but play main function is still that conventional A2/O techniques (including traditional A2/O techniques and are fallen
Put A2/O techniques), account for more than 80% by conventional A2/O techniques to complete the sewage of denitrogenation dephosphorizing in the world.In the biology of China
In denitrification dephosphorization technique, conventional A2/O occupies more than 60% market, for essential meaning, A2/O techniques should be anaerobism-lack
Oxygen-aerobic method, inversion A 2/O techniques are anoxic-anaerobic-aerobic process.
On anaerobic pond：Anaerobic pond is the environment for building anaerobism（Dissolved oxygen concentration is generally less than 0.2mg/L）, beneficial to anaerobism
Microorganism grows.Its effect is activated sludge absorption, degradation of organic substances.PolyP bacteria in usual backflow mixed liquor is in anaerobic condition
Lower release phosphate radical.It is release phosphorus that major function, which can be summarized, while partial organic substances carry out ammonification.
On anoxic pond：Anoxic pond is to build the environment of anoxic（Dissolved oxygen concentration is generally 0.2~0.5mg/L）, it is beneficial to
Anoxic microorganism grows.Its effect is activated sludge absorption, degradation of organic substances.Generally by the nitrite nitrogen in backflow mixed liquor
And nitrate nitrogen generates nitrogen release in the presence of denitrifying bacterium.Anoxic pond mainly denitrification can be summarized as.
On Aerobic Pond：Aerobic Pond is to build aerobic environment（Dissolved oxygen concentration is typically no less than 2mg/L）, beneficial to supporting well
Microorganism grows.It is aerobic activated sludge absorption, degradation of organic substances that it, which is acted on,.Generally by the carbon oxidizing compounds in organic matter
Thing is oxidized to CO2 and H2O；Nitrogen is oxidized to nitrite nitrogen and nitrate nitrogen；P elements are oxidized to phosphate radical.Exist simultaneously
PolyP bacteria is absorbed times over the phosphate radical under anaerobic condition under aerobic environment.It can be summarized as nitrifying and absorbing phosphorus, mainly go
Except ammonia nitrogen.
Such as Fig. 3, present situation sewage treatment process is inversion A 2/O techniques, and water outlet performs urban wastewater treatment firm pollutant emission
Standard (GB18918-2002) _ standard one-level B.Implication on exteenal reflux R is：If external reflux ratio is 200%, enter water 30L
Middle 20L backflows, 10L enters second pond.
In inversion A 2/O techniques, the subject matter that inversion anoxic pond is brought is still denitrification and releases phosphorus microorganism to carbon
The competition of source organic matter, wherein carbon source are a class nutrients of microorganism growth, are carbon compounds.Raw sewage is introduced into anoxic
The microbial degradation organic matter that pond is entered back into anaerobic pond, sewage will be utilized preferentially by denitrifying bacterium, the polyP bacteria in anaerobic pond
Enough carbon sources will be cannot get, phosphor-removing effect is influenceed.
Put into effect for Taizhou plain《Taizhou plain Bureau for Environmental Protection is on Taizhou plain urban wastewater treatment firm effluent index and standard
Limit value table（It is tentative）》（Taizhou IV standard of standard）, present situation sewage treatment plant, which must carry out carrying, marks transformation.
The content of the invention
The first object of the present invention is to provide a kind of A2/O ponds, and its advantage is that the denitrogenation of depth optimization sewage disposal system is removed
Phosphorus ability.
The present invention above-mentioned technical purpose technical scheme is that：A kind of A2/O ponds, including：
It is connected with mixing pit, mixing pit for being passed through in the factory of sewage outside sewage pipe and factory in sewage pipe, mixing pit provided with thick
Swinging grid sewage-removing machine is provided with grille well, coarse rack well；
Pre- anoxic pond, is provided with the mozzle for sewage flow between pre- anoxic pond and mixing pit；
Anaerobic pond, anaerobic pond is connected by water hole hole with pre- anoxic pond；
First anoxic pond, the first anoxic pond is connected by water hole hole with anaerobic pond；
Second anoxic pond, the second anoxic pond is connected by water hole hole with the first anoxic pond；
3rd anoxic pond, the 3rd anoxic pond is connected by water hole hole with the second anoxic pond；
First Aerobic Pond, the first Aerobic Pond is connected by water hole hole with the 3rd anoxic pond, and air is connected with the first Aerobic Pond
Pipe, air hose connection air blower；
Second Aerobic Pond, the second Aerobic Pond is connected by water hole hole with the first Aerobic Pond；First Aerobic Pond and the second Aerobic Pond
Inside it is equipped with aeration tube；
Second pond, the second Aerobic Pond is provided with suspension type center driving by a suspension pipeline communication second pond, the middle part of second pond
Mixer；Second pond is provided with the first return duct and the second return duct for flowing back, and the first return duct is communicated to pre- anoxic pond,
Second return duct is communicated to the first anoxic pond；The first outlet pipe and the second outlet pipe are connected with second pond, the first outlet pipe connects
Sludge dewatering equipment is connected to, the second outlet pipe is connected to deep bed denitrification filter pool；
It is provided between second Aerobic Pond and the first anoxic pond on the second return duct, the second return duct and is connected with diving reflux pump；
The first outlet pipe and the second outlet pipe are also associated with second pond, the first outlet pipe is connected to the sludge dewatering equipment in factory,
Second outlet pipe is connected to the deep bed denitrification filter pool in factory；
Submersible agitating is equipped with mixing pit, pre- anoxic pond, anaerobic pond, the first anoxic pond, the second anoxic pond and the 3rd anoxic pond
Machine.
By above-mentioned technical proposal, swinging grid sewage-removing machine, which is mainly used in removing in muddy water, submits larger impurity；Drum
Blower fan adds the water oxygen capacity of first, second Aerobic Pond；Suspension type center driving mixer is scraped on a large scale to sludge
The effect of Fender mud；Reflux pump of diving under water keeps the flow regime of sewage, and aeration tube plays the role of aeration and oxygenation；Sludge dewatering equipment
There is mud-water separation；First return duct establishes first return-flow structure, realize the muddy water in second pond be back to it is pre-
Anoxic pond, the second return duct establishes the second return-flow structure, realizes the muddy water in the second Aerobic Pond and is back to the first anoxic pond；
The returned sludge of second pond and part water inlet initially enter pre- anoxic pond（Another part water inlet is directly entered anaerobic pond）, micro- life
Thing makees carbon source using the organic matter in water inlet and carries out denitrification, removes the nitrate brought into by returned sludge, eliminates nitrate nitrogen
To the adverse effect of anaerobism dephosphorization, the biological phosphate-eliminating ability of system is improved；Deep bed denitrification filter pool passes through microorganism external carbon
Nitrate is converted into nitrogen discharge system by source, so as to reduce the total nitrogen in sewage.
The second object of the present invention is to provide a kind of multipoint water feeding improvement A2/O denitrification process, and its advantage is depth optimization
The denitrogenation dephosphorizing ability of sewage disposal system.
The present invention above-mentioned technical purpose technical scheme is that：A kind of multipoint water feeding improves A2/O
Denitrification process, comprises the following steps：
S1：Sewage pipe outside sewage pipe in factory and factory is connected to mixing pit, flowed to after being handled through swinging grid sewage-removing machine pre-
Proof submersible sand discharging pump is rotated, control pre-rotation proof submersible sand discharging pump makes sewage enter pre- anoxic pond through mozzle；
S2：It is 0.9 hour to make residence time of the sewage in pre- anoxic pond, and nitrite nitrogen and nitrate nitrogen are in denitrifying bacterium
The lower generation nitrogen release of effect；
S3：Sewage is set to introduce 1.8 hours anaerobic pond residence times from pre- anoxic pond, polyP bacteria discharges phosphoric acid under anaerobic
Root；
S4:Sewage is set to sequentially pass through the first anoxic pond, the second anoxic pond and the 3rd anoxic pond from anaerobic pond, the residence time is 6.3
Hour, nitrite nitrogen and nitrate nitrogen in sewage is generated nitrogen release in the presence of denitrifying bacterium；
S5：Sewage is set to sequentially pass through the first Aerobic Pond and the second Aerobic Pond, 9.4 hours residence times, sewage from the 3rd anoxic pond
In polyP bacteria absorb phosphate radical；
S6：Sewage is guided to suspension type center driving above the shaft axis for hanging mud machine by suspending pipeline, starts suspension type
Center driving hangs mud machine and carries out scraping mud；
S7：The first mud mixture confluxed in second pond is separately directed to deep bed denitrification filter pool, dehydration machine room and first
Return duct, wherein the first return duct is connected between pre- anoxic pond and anaerobic pond, 30%-40% the first mud mixture enters pre-
In anoxic pond, remaining first mud mixture enters anaerobic pond；The reflux ratio of first return duct is 50%-200%；
S8：By in deep bed denitrification filter pool 50% upper strata sewage discharge, 50% lower floor's sewage backflows to factory sewage pipe；
S9：Start diving reflux pump, be drained to the second mud mixture confluxed in the second Aerobic Pond by the second return duct
First anoxic pond；The reflux ratio of second return duct is 50%-150%；
S10：The aqueous solution that deep bed denitrification filter pool front end input is made into by PAM, and add water quality stabilizer progress coagulating
1-2 hours.
By above-mentioned technical proposal, in order to reduce competitive pressure of the polyP bacteria for carbon source, while exteenal reflux is reduced
The flow for entering pre- anoxic pond is reduced, most of high-quality carbon source is distributed into anaerobism dephosphorization, wherein the dirt of the first return duct backflow
Mud carries out denitrification in pre- anoxic pond, removes nitre state oxygen, enters back into anaerobic pond so that anaerobic pond keeps anaerobic state, reinforcing
Phosphor-removing effect, and the second mud mixture produced in the second Aerobic Pond（Containing nitrate）No longer entered by the second return duct and detested
Oxygen pond, the second mud mixture is directly entered the first anoxic pond, carries out denitrification, removes nitrate nitrogen, reinforced phosphor-removing effect；Using
Deep bed denitrification filter pool technique, deep bed denitrification filter pool is to collect the processing unit that biological denitrificaion and filtering function unite two into one, PAM
And the effect of water quality stabilizer causes the suspended particulate formation floccule body in sewage, deep bed denitrification filter pool effluent quality has reached
To " 5-5-3-1 "（BOD≤5mg/l；TSS≤5mg/l；TN≤3mg/l；TP≤1mg/l）Strict emission standards.
The present invention is further arranged to：Also include S11：Deep bed denitrification filter pool front end puts into carbon source supply device.
By above-mentioned technical proposal, nitrogen period not up to standard, filter tank front end mixing pit sets ring-type carbon source supply device, in water inlet
Carbon source is added, under anaerobic environment, nitrate is converted into nitrogen by denitrification, total nitrogen is realized（TN）Removal, really
Protect total nitrogen（TN）Emission compliance.
The present invention is further arranged to：Also include S12：Start air blower, air blower is by air hose to the first Aerobic Pond
Supply.
By above-mentioned technical proposal, the oxygen content of the first Aerobic Pond is added using the cooperation of air blower and air hose, is increased
Add the activity of aerobic microbiological, improve degradation efficiency.
The present invention is further arranged to：Paving quartz sand filter media is filled out in deep bed denitrification filter pool in S8.
By above-mentioned technical proposal, denitrifying bacteria is heterotroph flora, adds carbon source difference, the biochemical character of microorganism
Also difference.Deep bed denitrification filter pool physical characteristic is identical with deep bed three-stage filtration filter tank, and microorganism is attached to quartzy sand filtration
Grown on material, denitrification denitrogenation, have both filtering and denitrification functions.Certain theoretical foundation can help operating personnel to understand anti-nitre
Chemical industry skill, the suitable carbon source of selection, can preferably run and maintenance system；Quartz sand filter media adheres to as denitrifying bacteria gives birth to
Long carrier.System front end adds carbon source, filter process, while realizing anti-nitre in filter bed.Deep-bed filter system is recognized
To be optimal denitrification denitrogenation system, there are enough hydraulic detention times to ensure that denitrification process is realized.Denitrification denitrogenation
Meanwhile, TSS is down to below 5mg/L.
The present invention is further arranged to：Organic dispersing agent is delivered in mixing pit in S1, the injected volume of organic dispersing agent is
5-10mg/L。
By above-mentioned technical proposal, organic dispersing agent Bulab 8012 has bleeding agent, organic dispersing agent and biology concurrently scattered
The function of agent.Its do not increase during cleaning COD, not the characteristic of polluted-water not only meet environmental protection peace and ask, it is and scattered glutinous
Significantly, more important point, hardly with water is changed in whole processing procedure, meets energy-saving and emission-reduction and wanted again for mud, organic matter effect
Ask.
The present invention is further arranged to：Delivered in the first Aerobic Pond in S5 in sodium carbonate and sewage.
By above-mentioned technical proposal, in order to neutralize the acidity in sewage, neutralization is used as by sodium carbonate and fed intake, improved aerobic
The activity of microorganism.
The present invention is further arranged to：Delivered in the second Aerobic Pond in S5 in sodium carbonate and sewage.
By above-mentioned technical proposal, in order to slow down the acidity in sewage, neutralization is used as by sodium carbonate and fed intake, improved aerobic
The activity of microorganism.
The present invention is further arranged to：The temperature of anaerobic pond is 20-30 degrees Celsius in S3.
By above-mentioned technical proposal, Anaerobic Treatment needs the condition of a constant temperature, and causes in of a relatively high temperature
The activity of microorganism is higher.
The present invention is further arranged to：Deep bed denitrification filter pool front end input PAM coordinates PAC in S10.
Pass through above-mentioned technical proposal, PAC（Polyaluminium chloride）And have PAM (flocculant PAMs）What is be configured to is water-soluble
Liquid, the former is that flocculation aid the latter is suspended particulates loss of stability in flocculant, waste water, and micelle thing phase inter coagulation increases particulate
Greatly, floccule body, alumen ustum are formed；Floccule body is grown up departs from aqueous phase precipitation to after certain volume under gravity, so as to remove
A large amount of suspensions in waste water, so as to reach the effect of water process.For improve separating effect, can in good time, add flocculation aid in right amount.
Sewage after processing substantially can reach discharge standard in terms of colourity, containing chromium, suspension content, can arrange in addition or as people
The reinjected water of work water flood recovery.
In summary, the invention has the advantages that：Structure by multipoint water feeding and deep bed denitrification pond is real
Preferable denitrogenation dephosphorizing ability is showed.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment one；
Fig. 2 is the sketch of the sewage of embodiment one flow direction；
Fig. 3 is the schematic flow sheet of inversion A 2/O techniques in the prior art.
Reference：1st, mixing pit；2nd, pre- anoxic pond；3rd, anaerobic pond；4th, the first anoxic pond；5th, the second anoxic pond；6th,
Three anoxic ponds；7th, the first Aerobic Pond；8th, the second Aerobic Pond；9th, second pond；10th, swinging grid sewage-removing machine；11st, coarse rack well；
12nd, diving mixer；13rd, pre-rotation proof submersible sand discharging pump；14th, mozzle；15th, water hole hole；16th, aeration tube；17th, suspension pipe
Road；18th, air hose；19th, suspension type lifting center drive mud-scraper；20th, rotation dish；21st, puddle support；22nd, scraper plate；23rd, the first backflow
Pipe；24th, the second return duct；25th, the first outlet pipe；26th, the second outlet pipe；27th, deep bed denitrification filter pool；28th, proof submersible sand discharging pump；
29th, diving reflux pump；30th, fine fack well；31st, aerated grit chamber.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment one：With reference to Fig. 1 and Fig. 2, a kind of A2/O ponds, including be sequentially connected mixing pit 1, pre- anoxic pond 2, anaerobism
Pond 3, the first anoxic pond 4, the second anoxic pond 5, the 3rd anoxic pond 6, the first Aerobic Pond 7, the second Aerobic Pond 8 and second pond 9.
The outer wall of mixing pit 1 is communicated with factory outside sewage pipe and factory in sewage pipe, factory that sewage pipe connects respectively outside sewage pipe and factory
Connect the sewage network in factory and outside factory.It is provided with mixing pit 1 in coarse rack well 11, coarse rack well 11 and is provided with swinging grid decontamination
Machine 10, the interception for debris in water；Sewage pipe passes to coarse rack well 11 outside sewage pipe and factory in factory.The inwall of mixing pit 1
Diagonal position sets two diving mixers 12, promotes the drainage flow in mixing pit 1.
Pre-rotation proof submersible sand discharging pump 13 is provided with mixing pit 1, pre-rotation proof submersible sand discharging pump 13 is connected by a mozzle 14
To fine fack well, aerated grit chamber, pre- anoxic pond 2, moved towards according to arrow, pre- anoxic pond 2 is communicated to by a water hole hole 15
Anaerobic pond 3, likewise, anaerobic pond 3, the first anoxic pond 4, the second anoxic pond 5, the 3rd anoxic pond 6, the first Aerobic Pond 7 and second
Aerobic Pond 8 is connected by each water hole hole 15.Pre- anoxic pond 2, anaerobic pond 3, the first anoxic pond 4, the second anoxic pond 5 and the 3rd
It is mounted on being equipped with aeration tube 16, aeration tube in diving mixer 12, the first Aerobic Pond 7 and the second Aerobic Pond 8 in anoxic pond 6
16 play the role of aeration and oxygenation.Second Aerobic Pond 8 is communicated in second pond 9 by suspending pipeline 17.The top of first Aerobic Pond 7
Provided with air hose 18, the air hose 18 is connected to air blower.The available depth of first Aerobic Pond 7 and the second Aerobic Pond 8 is 4.5m,
MLSS values are 4000mg/L.
The middle part of second pond 9 is provided with suspension type lifting center drive mud-scraper 19, and suspension type mud scraper includes rotation dish 20, connection
In the outer circumferential puddle support 21 of rotation dish 20, puddle support 21 is provided with some scraper plates 22.3 meters of 9 available depth of second pond.
Second pond 9 is provided with the return duct 23 of proof submersible sand discharging pump 28 and first, and the first return duct 23 is connected to pre- anoxic pond 2,
Returned sludge be back between pre- anoxic pond 2 and anaerobic pond 3 after produce two flow direction, one of direction be pre- anoxic pond 2 in,
Another direction is in anaerobic pond 3.
The first outlet pipe 25 and the second outlet pipe 26 are connected with second pond 9, the first outlet pipe 25 is connected to the dirt in factory
Mud dewaterer, the second outlet pipe 26 is connected to the deep bed denitrification filter pool 27 in factory.Life in wherein deep bed denitrification filter pool 27
Thing matchmaker includes：NO3- digestive enzymes (Nar), NO2- digestive enzymes (Nir), NO digestive enzymes (Nor), N2O digestive enzymes (Nos).Deep bed is anti-
The denitrifying bacteria nitrified in filter tank 27 is heterotroph flora, adds that carbon source is different, the biochemical character of microorganism also difference,
Filled out in deep bed denitrification filter pool 27 and supply denitrification denitrogenation in attached growth of microorganisms, filter process provided with quartz sand filter media, had both
Filtering and denitrification functions.The deep effluent quality of bed denitrification filter pool 27 has reached " 5-5-3-1 "（BOD≤5mg/l；TSS≤5mg/
l；TN≤3mg/l；TP≤1mg/l）Strict emission standards.Throw into total nitrogen period not up to standard, the deep front end of bed denitrification filter pool 27
Ring-type carbon source supply device, carbon source is added in water inlet, under anaerobic environment, and nitrate is converted into nitrogen by denitrification,
Realize total nitrogen（TN）Removal, it is ensured that total nitrogen（TN）Emission compliance.
The second return duct 24 is provided between second Aerobic Pond 8 and the first anoxic pond 4, while the second return duct 24 insertion second
Liang Ge branches are formed in Aerobic Pond 8, two branches ends pass through the backflow mud mixture of reflux pump 29 of diving under water.
Embodiment two：A kind of multipoint water feeding improves A2/O denitrification process, comprises the following steps：
S1：Sewage pipe outside sewage pipe in factory and factory is connected to mixing pit 1, flowed to after being handled through swinging grid sewage-removing machine 10
Pre-rotation proof submersible sand discharging pump 13, control pre-rotation proof submersible sand discharging pump 13 makes sewage enter pre- anoxic pond 2, mixing pit through mozzle 14
Organic dispersing agent Bulab 8012 is delivered in 1, injected volume is 5-10mg/L；
S2：It is 0.9 hour to make residence time of the sewage in pre- anoxic pond 2, and nitrite nitrogen and nitrate nitrogen are in denitrifying bacterium
In the presence of generation nitrogen release；
S3：Sewage is set to introduce 1.8 hours 3 residence times of anaerobic pond from pre- anoxic pond 2, the temperature control of anaerobic pond 3 is taken the photograph in 20-30
Family name's degree, makes polyP bacteria discharge phosphate radical under anaerobic；
S4:Sewage is set to sequentially pass through the first anoxic pond 4, the second anoxic pond 5 and the 3rd anoxic pond 6 from anaerobic pond 3, the residence time is
6.3 hours, nitrite nitrogen and nitrate nitrogen in sewage is set to generate nitrogen release in the presence of denitrifying bacterium；
S5：Sewage is sequentially passed through the first Aerobic Pond 7 and the second Aerobic Pond 8 from the 3rd anoxic pond 6,9.4 hours residence times, make
PolyP bacteria in sewage absorbs phosphate radical, and is delivered in the first Aerobic Pond 7 and the second Aerobic Pond 8 in sodium carbonate progress sewage
With；
S6：Sewage is guided to suspension type center driving above the rotating shaft core for hanging mud machine by suspending pipeline 17, starts suspension
Formula center driving hangs mud machine and carries out scraping mud；
S7：The first mud mixture confluxed in second pond 9 is separately directed to deep bed denitrification filter pool 27, dehydration machine room and
One return duct 23, wherein the first return duct 23 is connected between pre- anoxic pond 2 and anaerobic pond 3,30%-40% the first muddy water mixing
Thing enters in pre- anoxic pond 2, and remaining first mud mixture enters anaerobic pond 3；The reflux ratio of first return duct 23 is 50%-
200%；
S8：The upper strata sewage that paving in deep bed denitrification filter pool 27 is filled out into quartz sand filter media, deep bed denitrification filter pool 27 50% is arranged
Go out, 50% lower floor's sewage backflows to factory sewage pipe；
S9：Start diving reflux pump 29, drawn the second mud mixture confluxed in the second Aerobic Pond 8 by the second return duct 24
It flow to the first anoxic pond 4；The reflux ratio of second return duct 24 is 50%-150%；
S10：The deep front end of bed denitrification filter pool 27 input is by PAC（Polyaluminium chloride）And have PAM (flocculant PAMs）Prepare
Into the aqueous solution, the former is that flocculation aid the latter is flocculant, and PAM can be as flocculant, and adds water quality stabilizer and mixed
Solidifying reaction 1-2 hours；Suspended particulates loss of stability in waste water, micelle thing phase inter coagulation increases particulate, formation floccule body,
Alumen ustum.
S11：The deep front end of bed denitrification filter pool 27 puts into carbon source supply device；
S12：Start air blower, air blower is supplied by air hose 18 to the first Aerobic Pond 7.
A part for first mud mixture carries out denitrification in pre- anoxic pond 2, removes nitre state oxygen, enters back into anaerobic pond
3, adverse effect of the nitrate nitrogen to anaerobism dephosphorization is reduced, another part is directly entered anaerobic pond 3, increases high-quality carbon source so that detest
The enhanced biological phosphorus removal effect of oxygen pond 3, the second mud mixture is directly entered the first anoxic pond 4, and no longer influences anaerobic pond 3 to remove
Phosphorus.Due to sludge reflux to pre- anoxic pond 2, and part intakes and is directly accessed anaerobic pond 3, therefore the sludge concentration of pre- anoxic pond 2 can
30% or so is higher by compared with the first Aerobic Pond 7 and the second Aerobic Pond 8.The denitrification rate that unit pond holds is significantly improved, denitrification
It can be effectively ensured.Can be according to different influent qualities, in the case of Various Seasonal, carbon source needed for biological denitrificaion and biological phosphate-eliminating
Change, regulation distribution to pre- anoxic pond 2 and the water inlet ratio of anaerobic pond 3, denitrification can be effectively ensured, system
In phosphor-removing effect it is also guaranteed.Deep bed denitrification realizes advanced nitrogen dephosphorization, and wherein flocculant reduces the discharge of water outlet total phosphorus
Denitrification under concentration, the carbon source supply device increase anaerobic environment added, realizes the emission compliance of total nitrogen.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification without creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the right of invention by Patent Law.
Claims (10)
1. a kind of A2/O ponds, it is characterised in that including：
It is connected with mixing pit (1), mixing pit (1) for being passed through in the factory of sewage sewage pipe, mixing pit outside sewage pipe and factory（1）
It is interior to be provided with coarse rack well（11）, coarse rack well (11) is interior to be provided with swinging grid sewage-removing machine (10)；
Pre- anoxic pond (2), is provided with the mozzle (14) for sewage flow between pre- anoxic pond (2) and mixing pit (1)；
Anaerobic pond (3), anaerobic pond (3) is connected by water hole hole (15) with pre- anoxic pond (2)；
First anoxic pond (4), the first anoxic pond (4) is connected by water hole hole (15) with anaerobic pond (3)；
Second anoxic pond (5), the second anoxic pond (5) is connected by water hole hole (15) with the first anoxic pond (4)；
3rd anoxic pond (6), the 3rd anoxic pond (6) is connected by water hole hole (15) with the second anoxic pond (5)；
First Aerobic Pond (7), the first Aerobic Pond (7) is connected by water hole hole (15) with the 3rd anoxic pond (6), the first Aerobic Pond
(7) air hose (18), air hose (18) connection air blower are connected with；
Second Aerobic Pond (8), the second Aerobic Pond (8) is connected by water hole hole (15) with the first Aerobic Pond (7)；First Aerobic Pond
(7) with being equipped with aeration tube (16) in the second Aerobic Pond (8)；
Second pond (9), the second Aerobic Pond (8) connects second pond (9) by a suspension pipeline (17), and second pond is set in the middle part of (9)
There is suspension type center driving mixer；Second pond (9) is provided with the first return duct (23) and the second return duct for flowing back
(24), the first return duct (23) is communicated to pre- anoxic pond (2), and the second return duct (24) is communicated to the first anoxic pond (4)；Second pond
(9) the first outlet pipe (25) and the second outlet pipe (26) are connected with, the first outlet pipe (25) is connected to sludge dewatering equipment, second
Outlet pipe (26) is connected to deep bed denitrification filter pool (27)；
The second return duct (24) is provided between second Aerobic Pond (8) and the first anoxic pond (4), the second return duct is connected with (24)
Diving reflux pump（29）；
The first outlet pipe (25) and the second outlet pipe (26) are also associated with second pond (9), the first outlet pipe (25) is connected to factory
Interior sludge dewatering equipment, the second outlet pipe (26) is connected to the deep bed denitrification filter pool (27) in factory；
Mixing pit (1), pre- anoxic pond (2), anaerobic pond (3), the first anoxic pond (4), the second anoxic pond (5) and the 3rd anoxic pond
(6) diving mixer (12) is equipped with.
2. a kind of multipoint water feeding improves A2/O denitrification process, it is characterised in that comprise the following steps：
S1：Sewage pipe outside sewage pipe in factory and factory is connected to mixing pit (1), flowed after being handled through swinging grid sewage-removing machine (10)
Move to pre-rotation proof submersible sand discharging pump（13）, control pre-rotation proof submersible sand discharging pump（13）Sewage is set to enter pre- anoxic through mozzle (14)
Pond (2)；
S2：It is 0.9 hour to make residence time of the sewage in pre- anoxic pond (2), and nitrite nitrogen and nitrate nitrogen are in denitrification
Nitrogen release is generated in the presence of bacterium；
S3：Sewage is set to introduce 1.8 hours anaerobic pond (3) residence times from pre- anoxic pond (2), polyP bacteria discharges under anaerobic
Phosphate radical；
S4:Sewage is sequentially passed through the first anoxic pond (4), the second anoxic pond (5) and the 3rd anoxic pond (6) from anaerobic pond (3), stop
It is 6.3 hours to stay the time, nitrite nitrogen and nitrate nitrogen in sewage is generated nitrogen release in the presence of denitrifying bacterium；
S5：Sewage is set to sequentially pass through the first Aerobic Pond (7) and the second Aerobic Pond (8), residence time 9.4 from the 3rd anoxic pond (6)
Hour, the polyP bacteria in sewage absorbs phosphate radical；
S6：Sewage is hung above the rotating shaft core of mud machine by suspending pipeline (17) guiding to suspension type center driving, started outstanding
Hanging center driving hangs mud machine and carries out scraping mud；
S7：The first mud mixture confluxed in second pond (9) is separately directed to deep bed denitrification filter pool (27), dehydration machine room
With the first return duct (23), wherein the first return duct (23) is connected between pre- anoxic pond (2) and anaerobic pond (3), 30%-40%'s
First mud mixture enters in pre- anoxic pond (2), and remaining first mud mixture enters anaerobic pond (3)；First return duct
(23) reflux ratio is 50%-200%；
S8：By in deep bed denitrification filter pool (27) 50% upper strata sewage discharge, 50% lower floor's sewage backflows to factory sewage pipe；
S9：Start diving reflux pump（29）, it is by the second return duct (24) that the second muddy water confluxed in the second Aerobic Pond (8) is mixed
Compound is drained to the first anoxic pond (4)；The reflux ratio of second return duct (24) is 50%-150%；
S10：The aqueous solution that deep bed denitrification filter pool (27) front end input is made into by PAM, and add water quality stabilizer progress coagulation
Reaction 1-2 hours.
3. a kind of multipoint water feeding improvement A2/O denitrification process according to claim 2, it is characterized in that：Also include S11：It is deep
Bed denitrification filter pool (27) front end input carbon source supply device.
4. a kind of multipoint water feeding improvement A2/O denitrification process according to claim 2, it is characterized in that：Also include S12：Open
Dynamic air blower, air blower is supplied by air hose (18) to the first Aerobic Pond (7).
5. a kind of multipoint water feeding improvement A2/O denitrification process according to claim 2, it is characterized in that：Deep bed in S8 is anti-
Paving quartz sand filter media is filled out in nitrification filter tank (27).
6. a kind of multipoint water feeding improvement A2/O denitrification process according to claim 2, it is characterized in that：Mixing pit in S1
(1) organic dispersing agent is delivered in, the injected volume of organic dispersing agent is 5-10mg/L.
7. a kind of multipoint water feeding improvement A2/O denitrification process according to claim 2, it is characterized in that：First in S5 is good
Delivered in oxygen pond (7) in sodium carbonate and sewage.
8. a kind of multipoint water feeding improvement A2/O denitrification process according to claim 2, it is characterized in that：It is second best in S5
Delivered in oxygen pond (8) in sodium carbonate and sewage.
9. a kind of multipoint water feeding improvement A2/O denitrification process according to claim 2, it is characterized in that：Anaerobic pond in S3
(3) temperature is 20-30 degrees Celsius.
10. a kind of multipoint water feeding improvement A2/O denitrification process according to claim 2, it is characterized in that：Deep bed is anti-in S10
Nitrify filter tank (27) front end input PAC and coordinate PAM.
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