CN208948950U - A kind of low-carbon high-efficiency Simultaneous Denitrification dephosphorization system - Google Patents
A kind of low-carbon high-efficiency Simultaneous Denitrification dephosphorization system Download PDFInfo
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Abstract
The utility model discloses a kind of low-carbon high-efficiency Simultaneous Denitrification dephosphorization system, belongs to sewage treatment field.The utility model sewage passes sequentially through reaction tank, secondary settling tank, it realizes intensified denitrification and dephosphorization, 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 low-carbon high-efficiency Simultaneous Denitrification dephosphorization system
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.
Summary of the invention
Based on above-mentioned technical problem, the utility model provides a kind of low-carbon high-efficiency Simultaneous Denitrification dephosphorization system.
Technical solution used by the utility model is:
A kind of low-carbon high-efficiency Simultaneous Denitrification dephosphorization system, which is characterized in that system is by reaction tank (S0), secondary settling tank
(S2) and connecting line forms；Reaction tank (S0) from water inlet end to water outlet 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).
Preferably, the pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP) 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 nitrification
Area (ON), aerobic decarburization area (OC) are equipped with aeration；The aerobic nitrification area (ON) and aerobic decarburization area (OC) add suspension
Carrier；The suspending vehicle density is 0.90-0.98g/cm3, voidage > 85%, filling rate in 30%-60%, specific 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)；
Preferably, the upper edge of the pre- anoxic zone anaerobic zone hole (K1) 0.5m-1.5m below anaerobic zone (AP) water surface；
The center of the area anaerobic zone Zhong Chen hole (K2) is the 50-60% of anaerobic zone (AP) available depth away from bottom of pond distance；It sinks in described
The lower edge of aerobic nitrification area, area hole (K3) is identical as anaerobic zone (AP) available depth away from bottom of pond distance；The aerobic nitrification area is anti-
The upper edge of nitrification zone hole (K4) 0.5m-1.5m below denitrification zone (ANP) water surface；The aerobic decarburization area in denitrification zone hole
The upper edge in hole (K5) 0.5m-1.5m below denitrification zone (ANP) water surface；The aerobic decarburization area exhalant region hole (K6) it is upper
Along the 0.5m-1.5m below denitrification zone (ANP) water surface.
Preferably, which is characterized in that the connecting line includes main water inlet tube (P1), branch's water inlet pipe (P2), outlet pipe
(P3), sludge surmounts pipe (P4), mud return line (P5), excess sludge delivery pipe (P6), connecting tube (P7)；The main water inlet tube
(P1) it 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 phase
Logical, the other end is communicated with main water inlet tube (P1)；The sludge surmounts the bucket (ND) of pipe one end (P4) Yu the bottom the area Zhong Chen (S1)
It communicates, the other end is communicated with the front bottom end of denitrification zone (ANP)；Described mud return line one end (P5) and the bottom secondary settling tank (S2)
Portion communicates, and the other end is communicated with pre- anoxic zone (PreA) front center；The excess sludge delivery pipe (P6) and secondary settling tank (S2)
Bottom communicates；Exhalant region (CS) is communicated with secondary settling tank (S2) by connecting tube (P7)；The outlet pipe (P3) and secondary settling tank (S2)
Top communicates；Sludge surmounts pipe (P4) and mud return line (P5) is respectively equipped with sludge pump.
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 in denitrification zone (ANP) the above 0.5m-1.0m of the water surface, and the bottom end denitrification zone inlet damper (D2) is in denitrification
The above 0.5m-1.0m of area (ANP) bottom of pond.
Preferably, the pre- anoxic zone (PreA), anaerobic zone (AP), the area Zhong Chen (S1) water surface absolute altitude are identical；It is described aerobic
Nitrification zone (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) water surface absolute altitude are identical；Anaerobic zone (AP) water surface
Absolute altitude is 0.1-0.3m bigger than denitrification zone (ANP) water surface absolute altitude.
Reaction tank (S0), secondary settling tank (S2) are passed sequentially through using the processing method of above system, including water inlet, realize pollution
The removal of object.
Preferably, pre- anoxic zone (PreA) residence time is 0.5-1.0h, and anaerobic zone (AP) residence time is
1.5-2.5h, the area Zhong Chen (S1) residence time be 1.5-3.0h, aerobic decarburization area (OC) the residence time 0.5-2.0h,
Exhalant region (CS) residence time≤0.5h；Aerobic nitrification area (ON) residence time nitrifies area according to aerobic nitrification area (ON)
Load determines that it is 0.0005-0.0015kgN/m that aerobic nitrification area (ON), which nitrifies volume loading rate,2/d；Aerobic decarburization area (OC) stops
Time determines that aerobic decarburization area (OC) organic area load is 0.004- according to aerobic decarburization area (OC) organic area load
0.012kgBOD/m2/d；Denitrification zone (ANP) residence time is determining according to denitrification zone (ANP) denitrification sludge loading, anti-nitre
Change area (ANP) denitrification sludge loading is 0.03-0.06kgN/kgMLSS/d.
Preferably, aerobic nitrification area (ON) sludge concentration < 0.5g/L, the anaerobic zone (AP), denitrification zone
(ANP), aerobic decarburization area (OC), exhalant region (CS) sludge concentration be 3-8g/L；The sludge age of suspended sludge is 4- in system
12d；Flow of inlet water is Q, and main water inlet tube (P1) flow is 80%-90%Q, and mud return line (P5) flow is 30%-120%Q, sludge
Surmount the 85%-100% that pipe (P4) flow is mud return line (P5) flow；The DO of the aerobic nitrification area (ON) is 2.0-
6.0mg/L, the DO of the aerobic decarburization area (OC) are 1.5-4.5mg/L, and the DO of the exhalant region (CS) is 1.0-3.0mg/L；
As the water outlet aerobic nitrification zone (ON) ammonia nitrogen < 1.5mg/L, DO is reduced, reduces be no more than 15% every time, each adjustment interval is extremely
Few 4h；As the water outlet aerobic nitrification zone (ON) ammonia nitrogen > 3mg/L, DO is improved, improves be no more than 15% every time, every time adjustment interval
At least 4h.
Preferably, TP removal rate>90% or water outlet TP<1mg/L, Δ BOD/ Δ TN<4；The area system Nei Ge maximum stream flow flux
No more than 2.2Q；Sludge phosphorus content > 4% of returned sludge.
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.
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；The area Zhong Chen (S1) and aerobic nitrification zone (ON)
Between, water flow enters the control for being mainly used for aerobic nitrification area (ON) mass-flux by dropping；To prevent returned sludge will be into
VFA in water rapidly depletes light, therefore only branch's water inlet pipe (P2) flow 10%-20%Q enters pre- anoxic zone (PreA), absolutely mostly
Number flow of inlet water is directly entered anaerobic zone (AP)；Bucket, and bottom slope aspect bucket is arranged in the area the Zhong Chen bottom (S1), predominantly strengthens
Sludge settling and concentration improve sludge and surmount sludge concentration in pipe (P4)；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 dirt of suspended sludge in system
Sludge age is 4-12d, and mainly control system is short sludge age, is more suitable for polyP bacteria and grows, and tradition A2The general sludge age of/O technique
For 15-25d；Sludge phosphorus content > 4% of returned sludge shows that biological phosphor-removing effect is good in system；The aerobic nitrification area
(ON) sludge concentration < 0.5g/L enters aerobic nitrification area (ON) for limiting suspended state sludge；The aerobic nitrification area (ON)
DO is 2.0-6.0mg/L, meets nitration condition, and with the increase of DO, nitrifies load and step up, according in system to nitrification
Conditions of demand, adjust DO.
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 0.0005-0.0015kgN/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.
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 only 2.2Q, is far below tradition A in the utility model reaction tank2/ O technique
The 15-25Q of 5Q and conventional oxidation ditch technique；It can be according to water inlet since DO directly affects nitrification load for floating stuffing area
DO is adjusted flexibly in load, realizes 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.
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 connecting tube, G1
For pre- anoxic zone anaerobic zone partition wall, G2 is to sink to separate wall in anaerobic zone, and G3 is that the area Zhong Chen aerobic nitrification separates wall, and G4 is aerobic nitre
The denitrification zone Hua Qu partition wall, G5 are that the aerobic decarburization in denitrification zone separates wall, and G6 is aerobic decarburization area exhalant region partition wall, and K1 is pre- lacks
Oxygen area anaerobic zone hole, K2 are the area anaerobic zone Zhong Chen hole, and K3 is aerobic nitrification area, the area Zhong Chen hole, and K4 is that aerobic nitrification zone is anti-
Nitrification zone hole, K5 are the aerobic decarburization area hole in denitrification zone, and K6 is aerobic decarburization area exhalant region hole, and W1 is aerobic nitrification zone
Denitrification zone porous plate, W2 be aerobic decarburization area exhalant region porous plate, D1 be pre- anoxic zone inlet damper, D2 be denitrification zone into
Water baffle, ND are bucket, and J1 is pre- anoxic zone blender, and J2 is anaerobic zone blender, and J3 is denitrification zone blender.
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 low-carbon high-efficiency Simultaneous Denitrification dephosphorization system, can solve traditional denitrification dephosphorization technique
Low efficiency, 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, de- suitable for saprobia
Nitrogen dephosphorization 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) 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 30%-60%, than
Surface area >=300m2/m3；The pre- anoxic zone (PreA) and anaerobic zone (AP) on pre- anoxic zone anaerobic zone partition wall (G1) by setting
Pre- anoxic zone anaerobic zone hole (K1) having communicates；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- below anaerobic zone (AP) water surface
1.5m；The center of the area anaerobic zone Zhong Chen hole (K2) is the 50-60% of anaerobic zone (AP) available depth away from bottom of pond distance；Institute
The lower edge of aerobic nitrification area, the area Shu Zhongchen hole (K3) is identical as anaerobic zone (AP) available depth away from bottom of pond distance；The aerobic nitre
The upper edge of the denitrification zone Hua Qu hole (K4) 0.5m-1.5m below denitrification zone (ANP) water surface；The denitrification zone is aerobic de-
The upper edge of carbon area hole (K5) 0.5m-1.5m below denitrification zone (ANP) water surface；The aerobic decarburization area exhalant region hole
(K6) upper edge 0.5m-1.5m below denitrification zone (ANP) water surface；The connecting line includes main water inlet tube (P1), branch
Water inlet pipe (P2), outlet pipe (P3), sludge surmount pipe (P4), mud return line (P5), excess sludge delivery pipe (P6), connecting tube
(P7)；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
Area (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) is communicated with secondary settling tank (S2) by connecting tube (P7)；The water outlet
It is communicated at the top of pipe (P3) and secondary settling tank (S2)；Sludge surmounts pipe (P4) and mud return line (P5) is respectively equipped with sludge pump；It is described
The pre- anoxic zone front end (PreA) is equipped with pre- anoxic zone inlet damper (D1), and pre- anoxic zone inlet damper (D1) top is in anaerobic zone
(AP) the above 0.5m-1.0m of the water surface, 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 zone front end (ANP) is equipped with denitrification zone inlet damper (D2), and the inlet damper top (D2) in denitrification zone is in anti-nitre
Change area (ANP) above 0.5m-1.0m of the water surface, the inlet damper bottom end (D2) in denitrification zone is more than denitrification zone (ANP) bottom of pond
0.5m-1.0m；The pre- anoxic zone (PreA), anaerobic zone (AP), the area Zhong Chen (S1) water surface absolute altitude are identical；The aerobic nitrification area
(ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) water surface absolute altitude are identical；Anaerobic zone (AP) water surface absolute altitude ratio
The big 0.1-0.3m of denitrification zone (ANP) water surface absolute altitude.
Water inlet a part enters pre- anoxic zone (PreA) by branch's water inlet pipe (P2), and a part passes through main water inlet tube (P1)
It is directly entered anaerobic zone (AP)；Returned sludge is passed back into pre- anoxic zone (PreA) from secondary settling tank (S2) by mud return line (P5),
And it is quickly mixed before pre- anoxic zone inlet damper (D1) with the water inlet of branch's water inlet pipe (P2)；Mud in pre- anoxic zone (PreA)
Aqueous mixtures enter anaerobic zone (AP) by pre- anoxic zone anaerobic zone hole (K1)；Anaerobic zone (AP) interior mud mixture is by detesting
The area oxygen Qu Zhongchen hole (K2) enters the area Zhong Chen (S1), after precipitating, realizes mud-water separation, supernatant is aerobic by the area Zhong Chen
Nitrification zone hole (K3) drop enters aerobic nitrification area (ON), and the sludge of sedimentation enters bucket (ND) and surmounts pipe by sludge afterwards
(P4) it is directly entered denitrification zone (ANP) front bottom end；Water in aerobic nitrification area (ON) passes through aerobic nitrification area denitrification zone
The aerobic nitrification area denitrification zone porous plate (W1) that hole (K4) is equipped with enters the front end denitrification zone (ANP), and in denitrification
Before area's inlet damper (D2) with the sludge that pipe (P4) surmounts surmounted by sludge mix；The mud mixture of denitrification zone (ANP)
Enter aerobic decarburization area (OC) by the aerobic decarburization area hole (K5) in denitrification zone；The mud mixture of aerobic decarburization area (OC) is logical
The aerobic decarburization area exhalant region porous plate (W2) that aerobic decarburization area exhalant region hole (K6) is equipped with is crossed, into exhalant region (CS),
Secondary settling tank (S2) is flowed into from exhalant region (CS) through connecting tube (P7), outlet pipe of the last processed water outlet from secondary settling tank (S2)
(P3) it discharges.
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.
Aerobic nitrification area (ON) sludge concentration 0.3g/L, anaerobic zone (AP), denitrification zone (ANP), aerobic decarburization area (OC),
The sludge concentration of exhalant region (CS) is 4-4.5g/L, and the sludge age of suspended sludge is 6-8d in system.Main water inlet tube (P1) flow
For 80%-90%Q, mud return line (P5) flow is 70%-90%Q, and it is 70%-90%Q that sludge, which surmounts pipe (P4) flow,；Aerobic nitrification
The DO in area (ON) is 2.0-6.0mg/L, and the DO of aerobic decarburization area (OC) is 1.5-4.5mg/L, and the DO of exhalant region (CS) is 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=
(6-0.4)/6=93.3% > 90%, Δ BOD/ Δ TN=(160-6)/(55-8.2)=3.29.
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 low-carbon high-efficiency Simultaneous Denitrification dephosphorization system, which is characterized in that system is by reaction tank (S0), secondary settling tank (S2)
And connecting line composition；Reaction tank (S0) from water inlet end to water outlet be followed successively by pre- anoxic zone (PreA), anaerobic zone (AP), in sink
Area (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) are equipped with blender；The area Zhong Chen (S1) bottom
Portion is equipped with bucket (ND), and the area Zhong Chen (S1) bottom slope aspect bucket (ND), the gradient is in 1%-3%；It is the aerobic nitrification area (ON), good
Oxygen decarburization area (OC) is equipped with aeration；The aerobic nitrification area (ON) and aerobic decarburization area (OC) add suspending carrier；It is described
Suspending vehicle density is 0.90-0.98g/cm3, voidage > 85%, filling rate is in 30%-60%, specific surface area >=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) water surface；The aerobic decarburization area hole (K5) in denitrification zone
Upper edge 0.5m-1.5m below denitrification zone (ANP) water surface；The upper edge of the aerobic decarburization area exhalant region hole (K6) is in anti-nitre
Change area (ANP) water surface or less 0.5m-1.5m；
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), connecting tube (P7)；The main water inlet tube (P1) and the front end bottom anaerobic zone (AP)
Portion communicates；Described branch's water inlet pipe one end (P2) is communicated with pre- anoxic zone (PreA) front center, the other end and main water inlet tube
(P1) it communicates；The sludge surmounts pipe one end (P4) and communicates with the bucket (ND) of the bottom the area Zhong Chen (S1), the other end and denitrification
The front bottom end in area (ANP) communicates；Described mud return line one end (P5) is communicated with the bottom secondary settling tank (S2), and the other end is lacked with pre-
Oxygen area (PreA) front center communicates；The excess sludge delivery pipe (P6) communicates with the bottom secondary settling tank (S2)；Exhalant region (CS)
It is communicated with secondary settling tank (S2) by connecting tube (P7)；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) is respectively equipped with sludge pump.
2. a kind of low-carbon high-efficiency Simultaneous Denitrification dephosphorization system according to claim 1, which is characterized in that described pre- scarce
The oxygen area front end (PreA) is equipped with pre- anoxic zone inlet damper (D1), and the pre- anoxic zone inlet damper top (D1) is in anaerobic zone (AP) water
The above 0.5m-1.0m in face, the pre- anoxic zone inlet damper bottom end (D1) is in the above 0.5m-1.0m of anaerobic zone (AP) bottom of pond；It is described anti-
The nitrification zone front end (ANP) is equipped with denitrification zone inlet damper (D2), and the top denitrification zone inlet damper (D2) is in denitrification zone
(ANP) the 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 low-carbon high-efficiency Simultaneous Denitrification dephosphorization system according to claim 1, which is characterized in that described pre- scarce
Oxygen area (PreA), anaerobic zone (AP), the area Zhong Chen (S1) water surface absolute altitude are identical；The aerobic nitrification area (ON), denitrification zone
(ANP), aerobic decarburization area (OC), exhalant region (CS) water surface absolute altitude are identical；Anaerobic zone (AP) water surface absolute altitude is than denitrification zone (ANP)
The big 0.1-0.3m of water surface absolute altitude.
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