CN208948951U - A kind of double mode sewerage nitrogen and phosphor processing system - Google Patents
A kind of double mode sewerage nitrogen and phosphor processing system Download PDFInfo
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Abstract
The utility model discloses a kind of double mode sewerage nitrogen and phosphor processing system, belongs to sewage treatment field.The utility model sewage passes sequentially through reaction tank, secondary settling tank, realize intensified denitrification and dephosphorization, when using surmounting sludge operational mode, total tp removal rate>90% or water outlet TP<1mg/L, Δ BOD/ Δ TN<4, the area system Nei Ge maximum stream flow flux is no more than 2.2Q, and sludge phosphorus content>4% of returned sludge has many advantages, such as that high-efficient denitrification and dephosphorization, energy saving in running low-carbon, load are high, land occupation saves, realization denitrification dephosphorization, TN removal rate are not limited by reflux ratio, it is convenient for management to control simple operation.The system of the utility model is made of reaction tank, secondary settling tank and connecting line, reaction tank is followed successively by pre- anoxic zone, anaerobic zone, the area Zhong Chen, aerobic nitrification area, denitrification zone, aerobic decarburization area, exhalant region from water inlet end to water outlet, connecting line includes that main water inlet tube, branch's water inlet pipe, outlet pipe, sludge surmount pipe, mud return line, excess sludge delivery pipe etc., and process flow is simple.
Description
Technical field
The utility model belongs to technical field of sewage, and in particular to a kind of double mode sewerage nitrogen and phosphor processing system.
Background technique
Biochemical wastewater treatment, mostly based on traditional denitrogenation dephosphorizing mechanism.Denitrification process, including nitrification, denitrification；
Nitrification, i.e., Autotrophic nitrification bacterium (AOB, NOB) is under aerobic condition, NH4 +-N→NO2 --N→NO2 --N；Denitrification,
I.e. denitrification flora under anoxic conditions, with NOX -It is electron donor, NO for electron acceptor, organic matter3 --N→NO2 --N→N2。
Biological Phosphorus Removal Process, including anaerobic phosphorus release, aerobic transition inhale phosphorus, discharge excess sludge realizes biological phosphate-eliminating；In anaerobic processes, gather
Phosphorus bacterium absorbs organic matter and is stored in cell body, discharges phosphate；It is organic by being stored in dissolved oxygen oxidative cell when aerobic
Object absorbs the phosphorus in water body.As it can be seen that core includes three classes flora, nitrifying bacteria community, denitrification flora, poly- phosphorus for denitrogenation dephosphorizing
Flora.Nitrifying bacteria community belongs to autotrophic bacterium, and stringent aerobic, specific growth rate is low；Most of denitrification flora belongs to heterotrophic bacteria, than life
Long rate is high；PolyP bacteria belongs to facultative heterotrophic bacteria, and specific growth rate is high.At present in the typical treatment process of sewage plant, work is mostly used
Property sludge and according to A2It is/O technology arrangement, i.e. anaerobism, anoxic, three sections aerobic, and flow back and nitrify to anoxic section in aerobic end
Liquid provides nitrate for denitrification, other techniques are mostly based on A2The deformation technique of/O.
Typical A2There are following intrinsic shortcomings for/O technique:
1) there are the contradictions on sludge age, denitrification flora, polyP bacteria group to need short sludge age for denitrogenation dephosphorizing, and nitrifying bacteria community needs
Will long sludge age, but only single sludge age in system is practical using compromise way, takes into account denitrogenation dephosphorizing；But for nitrifying bacteria community, mud
Age is insufficient, and winter treatment effect is undesirable, and treatment effect is unstable when water inlet is fluctuated；For denitrification flora, polyP bacteria group, mud
Age is too long, and sludge has aging tendency, treatment effeciency decline；
2) there are the differences in dissolved oxygen demand, polyP bacteria anaerobic phosphorus release to need absolute anaerobism for denitrogenation dephosphorizing, dissolved oxygen
Even inhibit anaerobic phosphorus release process in the presence of will affect, only anaerobic phosphorus release is more abundant, and aerobic stage could excessively inhale phosphorus, realizes good
Good biological phosphate-eliminating；The essence of denitrification process is denitrifying bacterium with NOx -It is electron donor for electron acceptor, organic matter, if
There are molecular state dissolved oxygens, then molecular state dissolved oxygen then can be preferentially used as electron acceptor, influence denitrification efficiency；Nitrifying bacteria community
For stringent aerobic, detesting will receive inhibition in the presence of anoxic and carbon source, therefore the HRT of aerobic section is greater than other works in traditional handicraft
The synthesis of skill section HRT, to guarantee the analytic metabolism of nitrifying bacteria community；For activated sludge process, activated sludge is hybrid system, is passed through
Each function is realized in the separation of each process section, but still is restricted each other, the design including the arrangement spatially of each process section and HRT
Deng；
3) there are the contentions in carbon source, polyP bacteria can only utilize the volatile fatty acid in organic matter for denitrogenation dephosphorizing, other
The organic matter of form needs first to be hydrolyzed into volatile fatty acid, could be utilized by polyP bacteria；Requirement of the denitrification flora to carbon source
Slightly below polyP bacteria, but low-carbon organic matter can only be also utilized, there are carbon source quality and quantities between denitrification flora and polyP bacteria group
Contention；General to require, biological denitrificaion requires water inlet C/N > 4, and when biological carbon and phosphorous removal requires water inlet C/N > 7, and domestic general raw
Wastewater influent C/N living generally < 4, belongs to carbon source deficiency, needs outer throwing carbon source；Nitrifying bacteria community is autotrophy, does not need organic carbon source,
And organic carbon source be more than it is a certain amount of when can to nitrifying bacteria community generate metabolism inhibition.
The essence of denitrification process is with NOX -It is electron donor for electron acceptor, organic matter；The sheet of polyP bacteria aerobic phosphorus absorption
It is electron acceptor, organic matter for electron donor that matter, which is using oxygen,；If polyP bacteria can be with NOX -It is electronics for electron acceptor, organic matter
" carbon is dual-purpose ", denitrification dephosphorization then can be achieved in donor, reduces water inlet C/N demand, reduces the carbon source consumption of sewage treatment；And
The research of molecular biology, it was found that this denitrification dephosphorization phenomenon is that this path denitrogenation dephosphorizing is laid a good foundation, and passes through height
The creation of concentration phosphate, nitrate, organic substance environment can promote Denitrifying Phosphorus Removal generation.
In addition, the isometric sludge age flora of nitrifying bacteria community is separated with the short sludge age flora such as denitrification flora, polyP bacteria, realize
Sludge age separation.Method of strain separating, including driving by double-energy, addition biomembrane etc..Driving by double-energy, i.e. two sets of biosystems, point
Long sludge age and short sludge age flora are not carried, and system structure is complicated, and control difficulty is big, requires operational management high, it is difficult in engineering
Middle large-area applications.In traditional A2Increase biomembrane in/O, fixed filler such as is installed in aerobic zone, but normal aeration provides
Hydraulic shear be not enough to promote the normal update of microorganism on fixed filler, longtime running generates the area Si Ni, serious to reduce
Nitrification efficiency；If in traditional A2Suspending carrier is loaded in/O, although foring mud membrane compound technology, can not be removed for denitrification
Phosphorus creates conditions, and suspending carrier system, when suspended state sludge concentration is excessive in system, the meeting of suspended state sludge and suspending carrier
On biomembrane generate competition, reduce nitrification efficiency.
While it is noted that although utilization of carbon source rate can be improved in denitrification dephosphorization, but when C/N of intaking is increased,
The consumption of its carbon source has limitation, may cause excessive organic matter and has flowed into nitrification region, has influenced system nitrification function；But it sets
If timing considers nitrification design when C/N high, it necessarily will increase nitrification region pool capacity, it is uneconomical to improve cost；If can be in nitre
Change in region, according to the difference of water inlet C/N and nitrification effect, pure membrane process and mud membrane compound technology is adjusted flexibly, that is, can guarantee
Treatment effect can also reduce investment, improve operational efficiency.
Summary of the invention
Based on above-mentioned technical problem, the utility model provides a kind of double mode sewerage nitrogen and phosphor processing system.
Technical solution used by the utility model is:
A kind of double mode sewerage nitrogen and phosphor processing system, which is characterized in that system is by reaction tank (S0), secondary settling tank (S2) and connects
Take over road composition；Reaction tank (S0) is followed successively by pre- anoxic zone (PreA), anaerobic zone (AP), the area Zhong Chen from water inlet end to water outlet
(S1), aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS).
Preferably, the pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP), the area Zhong Chen (S1) are equipped with and stir
Mix device；The area the Zhong Chen bottom (S1) is equipped with bucket (ND), and the area Zhong Chen (S1) bottom slope aspect bucket (ND), the gradient is in 1%-3%；Institute
It states aerobic nitrification area (ON), aerobic decarburization area (OC) and is equipped with aeration；The aerobic nitrification area (ON) and aerobic decarburization area (OC)
Add suspending carrier；The suspending vehicle density is 0.90-0.98g/cm3, voidage > 85%, filling rate in 10%-60%, than
Surface area >=300m2/m3。
Preferably, the pre- anoxic zone (PreA) and anaerobic zone (AP) are equipped with by pre- anoxic zone anaerobic zone partition wall (G1)
Pre- anoxic zone anaerobic zone hole (K1) communicate；The area anaerobic zone (AP) He Zhongchen (S1) separates wall by sinking in anaerobic zone
(G2) the anaerobic zone area the Zhong Chen hole (K2) being equipped with communicates；The area Zhong Chen (S1) and aerobic nitrification zone (ON) pass through the area Zhong Chen
Aerobic nitrification separates aerobic nitrification area, the area the Zhong Chen hole (K3) that wall (G3) is equipped with and communicates；The aerobic nitrification area (ON) and anti-
Nitrification zone (ANP) passes through aerobic nitrification area denitrification zone hole (K4) phase that aerobic nitrification area denitrification zone partition wall (G4) is equipped with
It is logical；Aerobic nitrification area denitrification zone hole (K4) is equipped with aerobic nitrification area denitrification zone porous plate (W1)；The anti-nitre
Change area (ANP) and aerobic decarburization area (OC) and separates that denitrification zone that wall (G5) is equipped with is aerobic to be taken off by the aerobic decarburization in denitrification zone
Carbon area hole (K5) communicates；The aerobic decarburization area (OC) and exhalant region (CS) pass through on aerobic decarburization area exhalant region partition wall (G6)
The aerobic decarburization area exhalant region hole (K6) being equipped with communicates；The aerobic decarburization area exhalant region hole (K6) is equipped with aerobic decarburization
Area's exhalant region porous plate (W2)；
The upper edge of the pre- anoxic zone anaerobic zone hole (K1) 0.5m-1.5m below anaerobic zone (AP) water surface；It is described to detest
The center of the area oxygen Qu Zhongchen hole (K2) is the 50-60% of anaerobic zone (AP) available depth away from bottom of pond distance；The area Zhong Chen is aerobic
The lower edge of nitrification zone hole (K3) is identical as anaerobic zone (AP) available depth away from bottom of pond distance；Aerobic nitrification area denitrification zone
The upper edge of hole (K4) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface；The aerobic decarburization in denitrification zone
The upper edge of area's hole (K5) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface；The aerobic decarburization area water outlet
The upper edge of area's hole (K6) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface.
Preferably, the connecting line includes that main water inlet tube (P1), branch's water inlet pipe (P2), outlet pipe (P3), sludge are super
More manage (P4), mud return line (P5), excess sludge delivery pipe (P6), low liquid level connecting tube (P7), high liquid level connecting tube (P8)；
The main water inlet tube (P1) communicates with anaerobic zone (AP) front bottom end；Described branch's water inlet pipe one end (P2) and pre- anoxic zone
(PreA) front center communicates, and the other end is communicated with main water inlet tube (P1)；The sludge surmounts pipe one end (P4) and the area Zhong Chen
(S1) bucket (ND) of bottom communicates, and the other end is communicated with the front bottom end of denitrification zone (ANP)；The mud return line (P5)
One end is communicated with the bottom secondary settling tank (S2), and the other end is communicated with pre- anoxic zone (PreA) front center；The excess sludge discharge
Pipe (P6) is communicated with the bottom secondary settling tank (S2)；Exhalant region (CS) and secondary settling tank (S2) pass through low liquid level connecting tube (P7), height respectively
Liquid level connecting tube (P8) communicates；It is communicated at the top of the outlet pipe (P3) and secondary settling tank (S2)；Sludge surmounts pipe (P4) and sludge returns
Flow tube (P5) is respectively equipped with sludge pump；The low liquid level connecting tube center (P7) is identical as low liquid level (L) absolute altitude；High liquid level connecting tube
(P8) center is identical as high liquid level (H) absolute altitude.
Preferably, the pre- anoxic zone front end (PreA) is equipped with pre- anoxic zone inlet damper (D1), pre- anoxic zone water inlet gear
The plate top (D1) is in the above 0.5m-1.0m of anaerobic zone (AP) water surface, and the pre- anoxic zone inlet damper bottom end (D1) is at anaerobic zone (AP)
The above 0.5m-1.0m of bottom of pond；The denitrification zone front end (ANP) is equipped with denitrification zone inlet damper (D2), denitrification zone water inlet
The baffle top (D2) is at denitrification zone (ANP) high liquid level (H) the above 0.5m-1.0m of the water surface, the bottom denitrification zone inlet damper (D2)
End is in the above 0.5m-1.0m of denitrification zone (ANP) bottom of pond.
Preferably, the pre- anoxic zone (PreA), anaerobic zone (AP), the area Zhong Chen (S1) water surface absolute altitude are identical, with high liquid level
(H) absolute altitude is identical；The aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) water surface mark
It is high identical, there are two high liquid level (H), low liquid level (L) water surface absolute altitudes；High liquid level (H) absolute altitude is 0.2- bigger than low liquid level (L) absolute altitude
0.4m。
Known to people for the industry, exhalant region (CS) is mainly used for stablizing liquid level and reduces water outlet DO, to prevent dirt
Mud sedimentation, settable stirring or a small amount of aeration；Micro-pore aeration both can be used in aeration, and perforated pipe aerating regulation can also be used；It is described porous
Plate, bore size are less than suspending carrier diameter, filler are prevented to be lost, and porous plate suqare is according to mass-flux and crosses orifice meter
It calculates, general via hole flow velocity is no more than 60m/h.
Known to people for the industry, mud return line (P5) flow is RQ, and R is return sludge ratio, and R is generally
30%-120%, R are generally selected according to sludge character, guarantee sludge concentration in reactor, representative value 60%-100%.
Known to people for the industry, the selection of sludge concentration is influenced by influent quality, premised on sludge age controls,
Select reasonable sludge concentration.
Known to people for the industry, the residence time of denitrification zone and pool capacity design are determined according to denitrification rate；
The residence time value of each subregion can determine in the utility model prescribed limit according to design experiences and industry standard.
Known to people for the industry, filling rate adds the volume of suspending carrier natural packing, and adds region
The ratio of pool capacity, to guarantee under normal aeration condition, filler can not generate accumulation in pond, and filling rate needs≤60%；
Voidage, i.e. the voidage of unit volume suspending carrier percentage of the total volume, voidage is bigger, adds outstanding
Influence of the float carrier to pool capacity is smaller, when such as voidage 90%, 1m3Pool capacity, when filling rate 100%, body shared by suspending carrier itself
Product is 0.1m3, when filling rate 50%, volume shared by suspending carrier itself is 0.05m3；
The surface area that specific surface area, i.e. unit suspending carrier can be provided, the unit volume with suspending carrier natural packing
Ratio, unit m2/m3；
Δ BOD/ Δ TN, i.e. (system water inlet BOD- system is discharged BOD)/(system water inlet TN- system is discharged TN), for passing
Unite A2General Δ BOD/ Δ TN > 4 when/O technique with denitrogenation is main, when good denitrification dephosphorization effect general Δ BOD/ Δ TN > 7, when
Show that system realizes TN removal with lower carbon source demand when Δ BOD/ Δ TN < 4；
Mass-flux, actual flow when referring to each subregion actual motion in reaction tank including water inlet and all kinds of reflux are comprehensive
It closes；For traditional A2/ O technique, if flow of inlet water is Q1, return sludge ratio 100%, mixed liquid recycle ratio 300%, then anaerobism
Area, anoxic zone, aerobic zone mass-flux be 2Q1,5Q1,5Q1 respectively, maximum stream flow flux is 5Q1；For the utility model,
If flow of inlet water is Q2, pre- anoxic zone water inlet is 10%Q2, and anaerobic zone water inlet is 90%Q2, and return sludge ratio 100%, sludge surmounts
Pipe flow is 100%Q2, then the flow of pre- anoxic zone, anaerobic zone, the area Zhong Chen, aerobic nitrification area, denitrification zone, aerobic decarburization area
Flux is respectively 1.1Q2,2Q2,2Q2, Q2,2Q2,2Q2, and maximum stream flow flux is 2Q2；
The sludge age of suspended sludge in system, i.e., do not consider the sludge age of suspended filler biofilm part, according only to system dirt
The sludge age for the suspended sludge that mud concentration and sludge volume calculate；
Sludge phosphorus content, the i.e. phosphorus content of unit mass sludge, in Biological Phosphorus Removal Processes, if biological phosphor-removing effect is preferable
When, sludge phosphorus content is generally in 3-6%；For traditional A2/ O technique, general sludge phosphorus content is in 1.5-3.5%；
Volume loading rate, the i.e. biomembrane of per surface area are nitrified, the amount of ammonia nitrogen, kgN/m can be aoxidized daily2/d；It is aerobic
Nitrification zone nitrifies volume loading rate, i.e. flow of inlet water × (system influent ammonia nitrogen-system is discharged ammonia nitrogen)/aerobic nitrification area suspending carrier
The sum of surface area；
Organic area load, the i.e. biomembrane of per surface area, can aoxidize the amount of BOD, kgBOD/m daily2/ d, BOD
Refer both to BOD5;Aerobic decarburization area organic area load, i.e. flow of inlet water × (1+ return sludge ratio) × (aerobic decarburization area water inlet
The sum of the aerobic decarburization area BOD- is discharged BOD)/aerobic decarburization area suspending carrier surface area；
Denitrification sludge loading, i.e. unit mass sludge are capable of the amount of denitrifying nitrate, kgN/kgMLSS/ daily
d；Denitrification zone denitrification sludge loading, i.e. flow of inlet water × (system water inlet TN- system is discharged TN)/(denitrification zone pool capacity ×
Denitrification zone sludge concentration);
Water inlet C/N refers to system water inlet BOD/ system water inlet TN, general to require, biological denitrificaion requirement water inlet C/N > 4, biology
Requirement water inlet C/N>7 when denitrogenation dephosphorizing, and domestic general sanitary sewage water inlet C/N is generally<4, belongs to carbon source deficiency, needs outer throwing
Carbon source.
Known to people for the industry, pure membrane process, that is, microorganism is mainly grown in a manner of attached state biomembrane, due to
There is biomembrane aging in the process to fall off, therefore there are a small amount of suspended state microorganism, general suspended state sludge concentration < 0.5g/L；Mud
The compound i.e. microorganism of film is grown in a manner of attached state biomembrane and suspended state activated sludge simultaneously, and general suspended state sludge concentration >
2.0g/L。
Pre- anoxic zone inlet damper (D1) is arranged to be intended to that water inlet can be sufficiently mixed with returned sludge, rapidly depletes reflux
The nitrate carried secretly in sludge, while preventing short stream in pre- anoxic zone (PreA)；Setting denitrification zone inlet damper (D2) is intended to
Nitrification liquid can be sufficiently mixed with the sludge surmounted, rapidly depletes the molecular state dissolved oxygen carried secretly in nitrification liquid, prevents simultaneously
Short stream in denitrification zone (ANP)；The setting of exhalant region (CS) is mainly used for stablizing water outlet liquid level, and reduces the dissolution of water outlet
Oxygen, exhalant region (CS) are not aerated or are aerated on a small quantity using perforated pipe, be only used for stirring；To prevent returned sludge will be in water inlet
VFA rapidly depletes light, therefore only branch's water inlet pipe (P2) flow 10%-20%Q enters pre- anoxic zone (PreA), overwhelming majority water inlet
Flow is directly entered anaerobic zone (AP)；
System provides two kinds of operational modes, and the mainly control of the area Zhong Chen (S1), sludge surmounts the flow direction in pipe (P4)
With flow, the water level of each functional areas, reaction tank (S0) and secondary settling tank (S2) mode of communicating；
When system be in surmount sludge operational mode when, the area Zhong Chen (S1) utilize bucket (ND), reinforcement sludge precipitating and it is dense
Contracting improves sludge and surmounts sludge concentration in pipe (P4), reduces flow, and sludge surmounts pipe (P4) flow direction and flowed by the area Zhong Chen (S1) at this time
To denitrification zone (ANP), flow 80%-100%Q, aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area in system
(OC), exhalant region (CS) is in low liquid level (L), and reaction tank (S0) is connected to by low liquid level connecting tube (P7) with secondary settling tank (S2)；
Between the area Zhong Chen (S1) and aerobic nitrification zone (ON), water flow is mainly used for aerobic nitrification area (ON) mass-flux by dropping to enter
Control；
When system is in reflux nitrification liquid operational mode, the area Zhong Chen (S1) turn on agitator, the area Zhong Chen (S1) is as anti-
Nitrification function, sludge surmounts pipe (P4) flow direction and by denitrification zone (ANP) flows to the area Zhong Chen (S1), flow 100%-300% at this time
Q, aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) are in high liquid level (H) in system,
Reaction tank (S0) is connected to by high liquid level connecting tube (P8) with secondary settling tank (S2)；
The pre- anoxic zone (PreA) of two kinds of operational modes, anaerobic zone (AP), the area Zhong Chen (S1) water level are all the same, are in height
Liquid level (H).
When system, which is in, surmounts sludge operational mode, the area system Nei Ge maximum stream flow flux is no more than 2.2Q, predominantly
Denitrification zone (ANP) provides high concentration phosphorus hydrochlorate, nitrate, organic concentration condition；The sludge age of suspended sludge is in system
4-12d, mainly control system are short sludge age, are more suitable for polyP bacteria and grow, and tradition A2The general sludge age of/O technique is 15-
25d；Sludge phosphorus content > 4% of returned sludge shows that biological phosphor-removing effect is good in system；Aerobic nitrification area (ON) sludge concentration
< 0.5g/L enters aerobic nitrification area (ON) for limiting suspended state sludge, and aerobic nitrification area (ON) at this time is pure membrane process；Institute
The DO for stating aerobic nitrification area (ON) is 2.0-6.0mg/L, meets nitration condition, and with the increase of DO, nitrifies load and gradually mention
Height, according to the conditions of demand of nitrification, adjusting DO in system.
When system is in reflux nitrification liquid operational mode, it is 100%-300%Q that sludge, which surmounts pipe (P4) flow, is played back
Flow the effect of nitrification liquid；Total tp removal rate>75% or water outlet TP<1.5mg/L, Δ BOD/ Δ TN<5；The area system Nei Ge maximum stream flow
Flux is no more than 5Q；Sludge phosphorus content > 2.5% of returned sludge.
When system designs, general anaerobic zone (AP) residence time is 1.5-2.5h, and pre- anoxic zone (PreA) residence time is
The area 0.5-1.0h, Zhong Chen (S1) residence time is 1.5-3.0h, exhalant region (CS) residence time < 0.5h, aerobic decarburization area (OC)
Residence time 0.5-2.0h；According to nitrification volume loading rate design, it is negative that aerobic nitrification area (ON) nitrifies area in aerobic nitrification area (ON)
Lotus is 0.0004-0.0012kgN/m2/ d is determined outstanding according to required suspending carrier surface area and floating stuffing effective ratio area
Float carrier dosage determines pool capacity according to suspending carrier dosage and filling rate；Due to the nitrification of system occur mainly in it is aerobic
Nitrification zone (ON), when calculating nitrification volume loading rate, according to flow of inlet water × (system influent ammonia nitrogen-system be discharged ammonia nitrogen)/aerobic
The sum of nitrification zone suspending carrier surface area；Aerobic decarburization area (OC) is designed according to organic volumetric loading, and aerobic decarburization area (OC) has
Machine volume loading rate is 0.004-0.012kgBOD/m2/ d, according to required suspending carrier surface area and the effective specific surface of floating stuffing
Product determines suspending carrier dosage, determines pool capacity according to suspending carrier dosage and filling rate, when calculating organic area load, presses
Shine into water flow × (1+ return sludge ratio) × (the aerobic aerobic decarburization area water outlet BOD of decarburization area water inlet BOD-)/aerobic decarburization area
The sum of suspending carrier surface area, aerobic decarburization area water inlet BOD is generally in 15-40mg/L at this time, while to consider actual flow
Flux；Denitrification zone (ANP) is designed according to denitrification sludge loading, and denitrification zone (ANP) denitrification sludge loading is 0.03-
0.06kgN/kgMLSS/d determines pool capacity according to sludge concentration；Associated loadings are by the shadow of the factors such as temperature, pH, DO, organic matter
It rings；Suspending carrier filling rate is 30%-60%, and suspending carrier filling rate is excessive, can expand and add region pool capacity, reduces filling rate；
Suspending carrier filling rate is too small, can reduce and add region pool capacity, increases filling rate；If system has the demand for increasing load from now on,
Filling rate can remove the limit, and improve filling rate to the increase of load from now on；If system has higher requirements for land occupation, on filling rate is desirable
Limit.
Core reasons using two kinds of operational modes are the influence being into water C/N to system.When intake C/N≤4 when, belong to
In carbon source deficiency state, the sludge operational mode that surmounts based on denitrification dephosphorization is used to can get optimal processing effect at this time；
But as the C/N in system > 4, because water-inlet carbon source is relatively sufficient, may have carbon source to be flowed into aerobic nitrification area (ON) influences nitrification
Effect, i.e., when aerobic nitrification zone (ON) DO, which has reached, requires the upper limit, the water outlet aerobic nitrification area (ON) ammonia nitrogen still > 3mg/L, this
When need to strengthen the nitrification ability of organic matter removal effect and aerobic nitrification area (ON) before aerobic nitrification area (ON).If
At the beginning of design, to guarantee water problems out, using lower load values, although can get stable treatment effect, not enough pass through
Ji；It is also contemplated that the influence of change of water quality in operational process simultaneously.It can by the way of pure film and the switching of mud membrane compound technology
Balance investment cost and operation stability well.If system nitrification ability is insufficient, switched to from sludge operational mode is surmounted
Flow back nitrification liquid operational mode, and medium sediment pool (S1) is used as denitrification function, accelerates consumption carbon source, and surmount pipe (P4) instead from sludge
It largely flows back nitrification liquid to by the denitrification zone area (ANP) Xiang Zhongchen (S1), accelerates organic matter consumption.At this point, aerobic nitrification area
(ON) become mud membrane compound technology from pure membrane process, although the nitrification volume loading rate of aerobic nitrification area (ON) biomembrane can be reduced,
But sludge age is extended, suspended sludge part is increased, overall nitrification ability is enhanced, while also because extending sludge age meeting
Reduce biological phosphor-removing effect.Substantially, surmounting sludge operational mode can get optimal removal effect and utilization of carbon source, and flow back
Nitrification liquid operational mode then with meet ammonia nitrogen removal effect be it is preferential, utilization of carbon source rate may be reduced.
The advantageous effects of the utility model are:
1) high-efficient denitrification and dephosphorization, TN removal rate > 80%, TP removal rate > 90% are much higher than traditional handicraft；
2) energy saving in running, maximum stream flow flux is only when using sludge operational mode is surmounted, in the utility model reaction tank
2.2Q is far below tradition A2The 5Q of/the O technique and 15-25Q of conventional oxidation ditch technique；For floating stuffing area, since DO is direct
Nitrification load is affected, DO can be adjusted flexibly according to influent load, is realized energy-saving；
3) low-carbon is run, can effectively reduce water inlet C/N required when denitrogenating phosphorus；Traditional handicraft can be realized efficiently
Denitrogenation dephosphorizing when, need to intake C/N>7, for the utility model, can complete high-efficient denitrification and dephosphorization when intaking C/N<4；
4) load height, land occupation save, and microorganisms of nitrogen and phosphors removal system separation, nitrifying process is carried dependent on the suspension of aerobic nitrification area
Nitrifying bacteria community on body, denitrification process and dephosphorization process depend on suspended sludge, and suspended sludge does not enter aerobic nitrification area,
It realizes that thorough autotrophy flora is separated with heterotrophism flora, is conducive to independent control, create respective optimum condition, processing for respective flora
Load is high, reduces 20%-40% land occupation compared with traditional handicraft；
5) it realizes denitrification dephosphorization, creates the region of high phosphate, nitrate, organic concentration, be denitrification dephosphorization
It creates good conditions；Traditional handicraft is bigger due to always flowing back, and denitrification zone is difficult to realize high concentration region；The utility model has
Effect reduces mass-flux, can be realized Super matrix concentration, and anaerobic zone sludge absorption large amount of organic, is directly entered denitrification
Utilization of carbon source efficiency is improved in area；
6) TN removal rate is not limited by when aerobic/non-aerobic ratio that flows back, traditional A2/ O technique is scarce by reflux type
Oxygen area provides nitrate, and to guarantee that continuous flow plug-flow state, general total reflux ratio are no more than 400%, theoretically TN removal rate does not surpass
Cross 80%；The utility model uses single flow to provide nitrate for denitrification zone, and TN removal rate is not limited by reflux ratio；Traditional A2/
O technique consider nitrifying bacteria community eubolism, it is desirable that aerobic HRT > non-aerobic HRT, due to realize flora separation, system no longer by
Secondary limitation；
7) control is simple, is easy to operational management conveniently, compares driving by double-energy, single-stage Biosystems control is simple；Compared to solid
Fixed pattern filler, operational management are convenient, realize that dynamic biological film updates by suspending carrier fluid mapper process, no dead mud or block it
Anxiety；
8) flexible operation, for water inlet C/N difference and system nitrification ability, flexible arrangement operational mode.
Detailed description of the invention
Fig. 1 is the flow sheet of the utility model.
In figure: S0 is reaction tank, and S2 is secondary settling tank, and PreA is pre- anoxic zone, and AP is anaerobic zone, and S1 is the area Zhong Chen, and ON is
Aerobic nitrification area, ANP are denitrification zone, and OC is aerobic decarburization area, and CS is exhalant region, and P1 is main water inlet tube, and P2 is branch's water inlet
Pipe, P3 are outlet pipe, and P4 is that sludge surmounts pipe, and P5 is mud return line, and P6 is excess sludge delivery pipe, and P7 is low liquid level connection
Pipe, P8 are high liquid level connecting tube, and G1 is pre- anoxic zone anaerobic zone partition wall, and G2 is to sink to separate wall in anaerobic zone, and G3 is that the area Zhong Chen is good
Oxygen nitrification zone partition wall, G4 are aerobic nitrification zone denitrification zone partition wall, and G5 is that the aerobic decarburization in denitrification zone separates wall, and G6 is aerobic de-
Carbon area exhalant region partition wall, K1 are pre- anoxic zone anaerobic zone hole, and K2 is the area anaerobic zone Zhong Chen hole, and K3 is the area Zhong Chen aerobic nitrification
Area's hole, K4 are aerobic nitrification zone denitrification zone hole, and K5 is the aerobic decarburization area hole in denitrification zone, and K6 is that aerobic decarburization area goes out
Pool hole, W1 are aerobic nitrification zone denitrification zone porous plate, and W2 is aerobic decarburization area exhalant region porous plate, and D1 is pre- anoxic zone
Inlet damper, D2 are denitrification zone inlet damper, and ND is bucket, and J1 is pre- anoxic zone blender, and J2 is anaerobic zone blender, J3
For denitrification zone blender, J4 is the area Zhong Chen blender, and H is high liquid level, and L is low liquid level.
Specific embodiment
It in order to become apparent from the purpose of this utility model, technical solution and advantage, defines, below with reference to specific implementation
The utility model is further described in example.
The utility model provides a kind of double mode sewerage nitrogen and phosphor processing system, can solve traditional denitrification dephosphorization technique efficiency
Low, outer throwing carbon source amount height, the big increase energy consumption of reflux ratio, denitrogenation dephosphorizing are difficult to the problems such as taking into account, and remove suitable for bio-denitrifying sewage
Phosphorus and sewage treatment plant's upgrading.
The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.The utility model,
As shown in connection with fig. 1, system is made of reaction tank (S0), secondary settling tank (S2) and connecting line；Reaction tank (S0) is from water inlet end to out
Water end (W.E.) be followed successively by pre- anoxic zone (PreA), anaerobic zone (AP), the area Zhong Chen (S1), aerobic nitrification area (ON), denitrification zone (ANP),
Aerobic decarburization area (OC), exhalant region (CS)；The pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP), the area Zhong Chen
(S1) it is equipped with blender；The area the Zhong Chen bottom (S1) is equipped with bucket (ND), the area Zhong Chen (S1) bottom slope aspect bucket (ND), slope
Degree is in 1%-3%；The aerobic nitrification area (ON), aerobic decarburization area (OC) are equipped with aeration；The aerobic nitrification area (ON) is become reconciled
Oxygen decarburization area (OC) adds suspending carrier；The suspending vehicle density is 0.90-0.98g/cm3, voidage > 85%, filling rate
In 10%-60%, specific surface area >=300m2/m3；
The pre- anoxic zone (PreA) and anaerobic zone (AP) are equipped with pre- scarce by pre- anoxic zone anaerobic zone partition wall (G1)
Oxygen area anaerobic zone hole (K1) communicates；The area anaerobic zone (AP) He Zhongchen (S1) is set on wall (G2) by sinking to separate in anaerobic zone
The area some anaerobic zone Zhong Chen hole (K2) communicates；The area Zhong Chen (S1) and aerobic nitrification zone (ON) pass through the area Zhong Chen aerobic nitrification
Aerobic nitrification area, the area the Zhong Chen hole (K3) that wall (G3) is equipped with is separated to communicate；The aerobic nitrification area (ON) and denitrification zone
(ANP) it is communicated by aerobic nitrification area denitrification zone hole (K4) that aerobic nitrification area denitrification zone partition wall (G4) is equipped with；Institute
Aerobic nitrification area denitrification zone hole (K4) is stated equipped with aerobic nitrification area denitrification zone porous plate (W1)；The denitrification zone
(ANP) and aerobic decarburization area (OC) separates the aerobic decarburization area in denitrification zone that wall (G5) is equipped with by the aerobic decarburization in denitrification zone
Hole (K5) communicates；The aerobic decarburization area (OC) and exhalant region (CS) are equipped with by aerobic decarburization area exhalant region partition wall (G6)
Aerobic decarburization area exhalant region hole (K6) communicate；The aerobic decarburization area exhalant region hole (K6) is equipped with aerobic decarburization area and goes out
Pool porous plate (W2)；
The upper edge of the pre- anoxic zone anaerobic zone hole (K1) 0.5m-1.5m below anaerobic zone (AP) water surface；It is described to detest
The center of the area oxygen Qu Zhongchen hole (K2) is the 50-60% of anaerobic zone (AP) available depth away from bottom of pond distance；The area Zhong Chen is aerobic
The lower edge of nitrification zone hole (K3) is identical as anaerobic zone (AP) available depth away from bottom of pond distance；Aerobic nitrification area denitrification zone
The upper edge of hole (K4) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface；The aerobic decarburization in denitrification zone
The upper edge of area's hole (K5) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface；The aerobic decarburization area water outlet
The upper edge of area's hole (K6) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface.
The connecting line includes that main water inlet tube (P1), branch's water inlet pipe (P2), outlet pipe (P3), sludge surmount pipe
(P4), mud return line (P5), excess sludge delivery pipe (P6), low liquid level connecting tube (P7), high liquid level connecting tube (P8)；It is described
Main water inlet tube (P1) is communicated with anaerobic zone (AP) front bottom end；Before described branch's water inlet pipe one end (P2) and pre- anoxic zone (PreA)
End middle part communicates, and the other end is communicated with main water inlet tube (P1)；The sludge surmounts pipe one end (P4) and the bottom the area Zhong Chen (S1)
Bucket (ND) communicates, and the other end is communicated with the front bottom end of denitrification zone (ANP)；Described mud return line one end (P5) is heavy with two
The bottom pond (S2) communicates, and the other end is communicated with pre- anoxic zone (PreA) front center；The excess sludge delivery pipe (P6) and two
Heavy bottom pond (S2) communicates；Exhalant region (CS) and secondary settling tank (S2) pass through low liquid level connecting tube (P7), high liquid level connecting tube respectively
(P8) it communicates；It is communicated at the top of the outlet pipe (P3) and secondary settling tank (S2)；Sludge surmounts pipe (P4) and mud return line (P5) point
It She You not sludge pump；The low liquid level connecting tube center (P7) is identical as low liquid level (L) absolute altitude；The high liquid level connecting tube center (P8) and height
Liquid level (H) absolute altitude is identical.
The pre- anoxic zone front end (PreA) is equipped with pre- anoxic zone inlet damper (D1), pre- anoxic zone inlet damper (D1) top
End is in the above 0.5m-1.0m of anaerobic zone (AP) water surface, and the pre- anoxic zone inlet damper bottom end (D1) is more than anaerobic zone (AP) bottom of pond
0.5m-1.0m；The denitrification zone front end (ANP) is equipped with denitrification zone inlet damper (D2), denitrification zone inlet damper (D2)
Top is in denitrification zone (ANP) high liquid level (H) the above 0.5m-1.0m of the water surface, and the inlet damper bottom end (D2) in denitrification zone is in anti-nitre
Change the above 0.5m-1.0m of area (ANP) bottom of pond.
The pre- anoxic zone (PreA), anaerobic zone (AP), the area Zhong Chen (S1) water surface absolute altitude are identical, with high liquid level (H) absolute altitude
It is identical；The aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) water surface absolute altitude are identical,
There are two high liquid level (H), low liquid level (L) water surface absolute altitudes；High liquid level (H) absolute altitude is 0.2-0.4m bigger than low liquid level (L) absolute altitude.
Described to surmount sludge operational mode, water inlet a part enters pre- anoxic zone (PreA) by branch's water inlet pipe (P2),
A part is directly entered anaerobic zone (AP) by main water inlet tube (P1)；Mud return line (P5) is by returned sludge from secondary settling tank (S2)
It passes back into pre- anoxic zone (PreA), and is quickly mixed before pre- anoxic zone inlet damper (D1) with the water inlet of branch's water inlet pipe (P2)
It closes；Mud mixture in pre- anoxic zone (PreA) enters anaerobic zone (AP) by pre- anoxic zone anaerobic zone hole (K1)；Anaerobism
Area (AP) interior mud mixture enters the area Zhong Chen (S1) by the area anaerobic zone Zhong Chen hole (K2), and after precipitating, supernatant is logical
Aerobic nitrification area, the area Guo Zhongchen hole (K3) drop enters aerobic nitrification area (ON), and the sludge of sedimentation passes through after entering bucket (ND)
Sludge surmounts pipe (P4) and is directly entered denitrification zone (ANP) front bottom end；Water in aerobic nitrification area (ON) passes through aerobic nitrification
The aerobic nitrification area denitrification zone porous plate (W1) that area denitrification zone hole (K4) is equipped with enters the front end denitrification zone (ANP),
And before the denitrification zone inlet damper (D2) with the sludge that pipe (P4) surmounts surmounted by sludge mix；Denitrification zone (ANP)
Mud mixture enters aerobic decarburization area (OC) by the aerobic decarburization area hole (K5) in denitrification zone；The mud of aerobic decarburization area (OC)
The aerobic decarburization area exhalant region porous plate (W2) that aqueous mixtures are equipped with by aerobic decarburization area exhalant region hole (K6), into out
Pool (CS) flows into secondary settling tank (S2) from exhalant region (CS) through low liquid level connecting tube (P7), and last processed water outlet is heavy from two
The outlet pipe (P3) in pond (S2) discharges；Pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP) blender are opened；It is good
Oxygen nitrification zone (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) are in low liquid level (L) operation；Sludge is super
More pipe (P4) water (flow) direction flows to denitrification zone (ANP) by the area Zhong Chen (S1)；
The reflux nitrification liquid operational mode, water inlet a part enter pre- anoxic zone by branch's water inlet pipe (P2)
(PreA), a part is directly entered anaerobic zone (AP) by main water inlet tube (P1)；Mud return line (P5) is by returned sludge from two
Heavy pond (S2) is passed back into pre- anoxic zone (PreA), and with the water inlet of branch's water inlet pipe (P2) before pre- anoxic zone inlet damper (D1)
Quickly mixing；Mud mixture in pre- anoxic zone (PreA) enters anaerobic zone by pre- anoxic zone anaerobic zone hole (K1)
(AP)；Anaerobic zone (AP) interior mud mixture enters the area Zhong Chen (S1) by the area anaerobic zone Zhong Chen hole (K2)；The area Zhong Chen (S1)
Interior mud mixture enters aerobic nitrification area (ON) by aerobic nitrification area, the area Zhong Chen hole (K3)；In aerobic nitrification area (ON)
Mud mixture pass through the aerobic nitrification area denitrification zone porous plate that is equipped with of aerobic nitrification area denitrification zone hole (K4)
(W1) enter the front end denitrification zone (ANP)；Mud mixture a part of denitrification zone (ANP) surmounts pipe (P4) by sludge and returns
It flow at the area Zhong Chen (S1) bucket (ND), a part enters aerobic decarburization area by the aerobic decarburization area hole (K5) in denitrification zone
(OC)；The aerobic decarburization area that the mud mixture of aerobic decarburization area (OC) is equipped with by aerobic decarburization area exhalant region hole (K6)
Exhalant region porous plate (W2) flows into secondary settling tank (S2) from exhalant region (CS) through high liquid level connecting tube (P8) into exhalant region (CS),
Last processed water outlet is discharged from the outlet pipe (P3) of secondary settling tank (S2)；Pre- anoxic zone (PreA), anaerobic zone (AP), denitrification
Area (ANP), the area Zhong Chen (S1) blender are opened；Aerobic nitrification area (ON), aerobic decarburization area (OC), goes out denitrification zone (ANP)
Pool (CS) is in high liquid level (H) operation；Sludge surmounts pipe (P4) water (flow) direction and flows to the area Zhong Chen by denitrification zone (ANP)
(S1)。
Embodiment 1:
Discharge of sewage Q is 100000m3/ d, is sanitary sewage, and water inlet mean value is ammonia nitrogen 45mg/L, TN55mg/L, TP6mg/
L, BOD160mg/L, Effluent criteria are ammonia nitrogen < 3mg/L, TN < 10mg/L, TP < 0.5mg/L, BOD < 10mg/L, BOD/TN of intaking=
2.91, using device as described in Figure 1.
Pre- anoxic zone (PreA) residence time is 0.5h, and anaerobic zone (AP) residence time is 2.0h, and the area Zhong Chen (S1) is stopped
Time is 2.5h, exhalant region (CS) residence time 0.5h；Aerobic nitrification area (ON) residence time is 2.5h, using specific surface area
800m2/m3Suspending carrier, filling rate 50%；Aerobic decarburization area (OC) residence time is 0.5h, using specific surface area 800m2/m3It is outstanding
Float carrier, filling rate 30%；Denitrification zone (ANP) residence time is 4.5h；Total residence time 13.0h.
System, which uses, surmounts sludge operational mode, aerobic nitrification area (ON) sludge concentration 0.3g/L, anaerobic zone (AP), anti-nitre
Change area (ANP), aerobic decarburization area (OC), exhalant region (CS) sludge concentration be 4-4.5g/L, the sludge of suspended sludge in system
Age is 6-8d.Main water inlet tube (P1) flow is 80%-90%Q, and mud return line (P5) flow is 70%-90%Q, and sludge surmounts pipe
(P4) flow is 70%-90%Q；The DO in aerobic nitrification area (ON) is 2.0-6.0mg/L, and the DO of aerobic decarburization area (OC) is 1.5-
4.5mg/L, the DO of exhalant region (CS) are 1.0-3.0mg/L.
The area system Nei Ge maximum stream flow flux is 1.9Q；The sludge phosphorus content 4.8% of returned sludge.
Water outlet TN mean value be 8.2mg/L, water outlet TP mean value be 0.4mg/L, water outlet BOD mean value be 6mg/L, TP removal rate=
Δ TP/ water inlet TP=(6-0.4)/6=93.3%, Δ BOD/ Δ TN=(160-6)/(55-8.2)=3.29.
Embodiment 2:
The operation of embodiment 1 meets with influent quality impact, larger change occurs for influent quality, and water inlet BOD reaches to 300d
200mg/L, less, aerobic nitrification area (ON) DO is 5.5-6.0mg/L, aerobic nitrification area (ON) to the variation of other index averages at this time
Water outlet ammonia nitrogen be 4.5mg/L still>3mg/L, it is total be discharged ammonia nitrogen by before<1mg/L improves to 3.5mg/L, switch to reflux
Nitrification liquid operational mode；
When the nitrification liquid operational mode that flows back, the sludge age of suspended sludge is increased to as 12-15d in system；Flow of inlet water is Q,
Main water inlet tube (P1) flow is 80%-90%Q, and mud return line (P5) flow is 70%-90%Q, and sludge surmounts pipe (P4) flow and is
200%Q；The DO in aerobic nitrification area (ON) is 4.0-6.0mg/L, and the DO of aerobic decarburization area (OC) is 1.5-4.5mg/L, exhalant region
(CS) DO is 1.0-3.0mg/L；System stably reaching standard, the water outlet aerobic nitrification area (ON) ammonia nitrogen be gradually down to 3mg/L hereinafter,
Total water outlet ammonia nitrogen is down to 1mg/L or less；After running 30d, system influent quality restores normal, aerobic under the premise of guarantee treatment effect
The DO of nitrification zone (ON) is gradually reduced to 2.0-2.5mg/L, switches to and surmounts sludge operational mode.
Water outlet TN mean value is 9.6mg/L, and water outlet TP mean value is 1.36mg/L, and water outlet BOD mean value is 10mg/L, TP removal rate
=Δ TP/ water inlet TP=(6-1.36)/6=77.3%, Δ BOD/ Δ TN=(200-10)/(55-9.6)=4.18.
When surmounting sludge operational mode, aerobic nitrification area (ON) sludge concentration 0.3g/L, anaerobic zone (AP), denitrification zone
(ANP), aerobic decarburization area (OC), exhalant region (CS) sludge concentration be 4-4.5g/L, the sludge age of suspended sludge is in system
6-8d.Main water inlet tube (P1) flow is 80%-90%Q, and mud return line (P5) flow is 70%-90%Q, and sludge surmounts pipe (P4) stream
Amount is 70%-90%Q；The DO in aerobic nitrification area (ON) is 2.0-6.0mg/L, and the DO of aerobic decarburization area (OC) is 1.5-4.5mg/L,
The DO of exhalant region (CS) is 1.0-3.0mg/L.
Water outlet TN mean value be 8.1mg/L, water outlet TP mean value be 0.31mg/L, water outlet BOD mean value be 5mg/L, TP removal rate=
Δ TP/ water inlet TP=(6-0.31)/6=94.8%, Δ BOD/ Δ TN=(160-5)/(55-8.1)=3.30.
Although more herein used denitrification zone, mud return line, sludge to surmount the terms such as pipe, not
It rules out the possibility of using other terms, the letter that those skilled in the art do these terms under the enlightenment of the utility model
Single replacement, should be covered by the scope of the present utility model within.Take or use for reference existing skill in the part that do not address in aforesaid way
Art can be realized.The above is only the preferred embodiment of the utility model, is not intended to limit the utility model, and should refer to
It out, for those skilled in the art, without deviating from the technical principle of the utility model, can be with
Several improvements and modifications are made, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (3)
1. a kind of double mode sewerage nitrogen and phosphor processing system, which is characterized in that system is by reaction tank (S0), secondary settling tank (S2) and connection
Pipeline composition；Reaction tank (S0) is followed successively by pre- anoxic zone (PreA), anaerobic zone (AP), the area Zhong Chen from water inlet end to water outlet
(S1), aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS)；
The pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP), the area Zhong Chen (S1) are equipped with blender；In described
The heavy area bottom (S1) is equipped with bucket (ND), and the area Zhong Chen (S1) bottom slope aspect bucket (ND), the gradient is in 1%-3%；The aerobic nitre
Change area (ON), aerobic decarburization area (OC) is equipped with aeration；The aerobic nitrification area (ON) and aerobic decarburization area (OC) add outstanding
Float carrier；The suspending vehicle density is 0.90-0.98g/cm3, voidage > 85%, filling rate is in 10%-60%, specific surface
Product >=300m2/m3；
The pre- anoxic zone (PreA) and anaerobic zone (AP) pass through the pre- anoxic zone that pre- anoxic zone anaerobic zone partition wall (G1) is equipped with
Anaerobic zone hole (K1) communicates；The area anaerobic zone (AP) He Zhongchen (S1) separates what wall (G2) was equipped with by sinking in anaerobic zone
The anaerobic zone area Zhong Chen hole (K2) communicates；The area Zhong Chen (S1) and aerobic nitrification zone (ON) are separated by the area Zhong Chen aerobic nitrification
Aerobic nitrification area, the area the Zhong Chen hole (K3) that wall (G3) is equipped with communicates；The aerobic nitrification area (ON) and denitrification zone (ANP)
Aerobic nitrification area denitrification zone hole (K4) being equipped with by aerobic nitrification area denitrification zone partition wall (G4) communicates；It is described aerobic
Nitrification zone denitrification zone hole (K4) is equipped with aerobic nitrification area denitrification zone porous plate (W1)；The denitrification zone (ANP) and
Aerobic decarburization area (OC) separates the aerobic decarburization area hole in denitrification zone that wall (G5) is equipped with by the aerobic decarburization in denitrification zone
(K5) it communicates；It is good that the aerobic decarburization area (OC) and exhalant region (CS) are equipped with by aerobic decarburization area exhalant region partition wall (G6)
Oxygen decarburization area exhalant region hole (K6) communicates；The aerobic decarburization area exhalant region hole (K6) is equipped with aerobic decarburization area exhalant region
Porous plate (W2)；
The upper edge of the pre- anoxic zone anaerobic zone hole (K1) 0.5m-1.5m below anaerobic zone (AP) water surface；The anaerobic zone
The center of the area Zhong Chen hole (K2) is the 50-60% of anaerobic zone (AP) available depth away from bottom of pond distance；The aerobic nitre in the area Zhong Chen
The lower edge for changing area's hole (K3) is identical as anaerobic zone (AP) available depth away from bottom of pond distance；Aerobic nitrification area denitrification zone hole
The upper edge in hole (K4) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface；The aerobic decarburization area in denitrification zone
The upper edge of hole (K5) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface；The aerobic decarburization area exhalant region
The upper edge of hole (K6) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface；
The connecting line includes that main water inlet tube (P1), branch's water inlet pipe (P2), outlet pipe (P3), sludge surmount pipe (P4), dirty
Mud return pipe (P5), excess sludge delivery pipe (P6), low liquid level connecting tube (P7), high liquid level connecting tube (P8)；The main water inlet
Pipe (P1) is communicated with anaerobic zone (AP) front bottom end；Described branch's water inlet pipe one end (P2) and pre- anoxic zone (PreA) front center
It communicates, the other end is communicated with main water inlet tube (P1)；The sludge surmounts the bucket of pipe one end (P4) Yu the bottom the area Zhong Chen (S1)
(ND) it communicates, the other end is communicated with the front bottom end of denitrification zone (ANP)；Described mud return line one end (P5) and secondary settling tank
(S2) bottom communicates, and the other end is communicated with pre- anoxic zone (PreA) front center；The excess sludge delivery pipe (P6) is heavy with two
The bottom pond (S2) communicates；Exhalant region (CS) and secondary settling tank (S2) pass through low liquid level connecting tube (P7), high liquid level connecting tube respectively
(P8) it communicates；It is communicated at the top of the outlet pipe (P3) and secondary settling tank (S2)；Sludge surmounts pipe (P4) and mud return line (P5) point
It She You not sludge pump；The low liquid level connecting tube center (P7) is identical as low liquid level (L) absolute altitude；The high liquid level connecting tube center (P8) and height
Liquid level (H) absolute altitude is identical.
2. a kind of double mode sewerage nitrogen and phosphor processing system according to claim 1, which is characterized in that the pre- anoxic zone
(PreA) front end be equipped with pre- anoxic zone inlet damper (D1), the pre- anoxic zone inlet damper top (D1) anaerobic zone (AP) water surface with
Upper 0.5m-1.0m, the pre- anoxic zone inlet damper bottom end (D1) is in the above 0.5m-1.0m of anaerobic zone (AP) bottom of pond；The denitrification
The area front end (ANP) is equipped with denitrification zone inlet damper (D2), and the inlet damper top (D2) in denitrification zone is in denitrification zone (ANP) height
Liquid level (H) above 0.5m-1.0m of the water surface, the inlet damper bottom end (D2) in denitrification zone is in the above 0.5m- of denitrification zone (ANP) bottom of pond
1.0m。
3. a kind of double mode sewerage nitrogen and phosphor processing system according to claim 1, which is characterized in that the pre- anoxic zone
(PreA), anaerobic zone (AP), the area Zhong Chen (S1) water surface absolute altitude are identical, identical as high liquid level (H) absolute altitude；The aerobic nitrification area
(ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) water surface absolute altitude are identical, there is high liquid level (H), low liquid level
(L) two water surface absolute altitudes；High liquid level (H) absolute altitude is 0.2-0.4m bigger than low liquid level (L) absolute altitude.
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