CN108689491A - A kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability - Google Patents
A kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000010865 sewage Substances 0.000 title claims abstract description 22
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 239000003446 ligand Substances 0.000 title claims abstract description 12
- 239000010802 sludge Substances 0.000 claims abstract description 185
- 238000005261 decarburization Methods 0.000 claims abstract description 90
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 30
- 238000010992 reflux Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000004907 flux Effects 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 69
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 23
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 21
- 238000011068 loading method Methods 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 11
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000479 mixture part Substances 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 22
- 239000011574 phosphorus Substances 0.000 abstract description 22
- 230000008569 process Effects 0.000 abstract description 22
- 238000007726 management method Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 241000894006 Bacteria Species 0.000 description 29
- 238000011049 filling Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 13
- 239000005416 organic matter Substances 0.000 description 13
- 229910052760 oxygen Inorganic materials 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- 230000001546 nitrifying effect Effects 0.000 description 12
- 229920000388 Polyphosphate Polymers 0.000 description 11
- 229920000037 Polyproline Polymers 0.000 description 11
- 239000001205 polyphosphate Substances 0.000 description 11
- 235000011176 polyphosphates Nutrition 0.000 description 11
- 229910002651 NO3 Inorganic materials 0.000 description 8
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 8
- 239000012528 membrane Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 7
- 238000005273 aeration Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000001651 autotrophic effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention discloses a kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability, belongs to sewage treatment field.Sewage of the present invention passes sequentially through reaction tank, secondary settling tank, realizes intensified denitrification and dephosphorization, when using surmounting sludge operational mode, total tp removal rate;90% or water outlet TP<1mg/L, Δ BOD/ Δs TN<The area 4, system Nei Ge maximum stream flow flux is no more than 2.2Q, the sludge phosphorus content of returned sludge;4%, have many advantages, such as that high-efficient denitrification and dephosphorization, energy saving in running low-carbon, load are high, take up an area province, realization denitrification dephosphorization, TN removal rates are not limited by reflux ratio, it is convenient to control simple operation management.The system of the present invention is made of reaction tank, secondary settling tank and connecting line, reaction tank is followed successively by pre- anoxic zone, anaerobic zone, the areas 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 technological process is simple.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of sewage disposal side of adjustable nitrogen phosphorus ligands ability
Method.
Background technology
Biochemical wastewater treatment is based on traditional denitrogenation dephosphorizing mechanism more.Denitrification process, including nitrification, denitrification;
Nitrification, i.e. Autotrophic nitrification bacterium(AOB,NOB)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 for denitrogenation dephosphorizing, core includes three classes flora, nitrifying bacteria community, denitrification flora, poly- phosphorus
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 arrangements, 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 to be based on A2The deformation technique of/O.
Typical A2There are following intrinsic shortcomings for/O techniques:
1)There are the contradiction on sludge age, denitrification flora, polyP bacteria groups, and short sludge age, nitrifying bacteria community to be needed to need to grow for denitrogenation dephosphorizing
Sludge age, but only single sludge age in system, it is practical using compromise way, take into account denitrogenation dephosphorizing;But for nitrifying bacteria community, sludge age is not
Foot, winter treatment effect is undesirable, and treatment effect is unstable when water inlet is fluctuated;For denitrification flora, polyP bacteria group, sludge age mistake
Long, sludge has aging tendency, treatment effeciency to decline;
2)There are the difference in dissolved oxygen demand, polyP bacteria anaerobic phosphorus releases to need absolute anaerobism, the presence of dissolved oxygen for denitrogenation dephosphorizing
It can influence even to inhibit anaerobic phosphorus release process, only anaerobic phosphorus release is more abundant, and aerobic stage could excessively inhale phosphorus, realizes good
Biological phosphate-eliminating;The essence of denitrification process is denitrifying bacterium with NOx -It is electron donor for electron acceptor, organic matter, if in the presence of
Molecular state dissolved oxygen, then molecular state dissolved oxygen then can by preferentially be used as electron acceptor, be influenced denitrification efficiency;Nitrifying bacteria community is tight
Lattice aerobic, detesting can be suppressed in the presence of anoxic and carbon source, therefore the HRT of aerobic section is greater than other process sections in traditional handicraft
The synthesis of HRT, to ensure the analytic metabolism of nitrifying bacteria community;For activated sludge process, activated sludge is hybrid system, passes through each work
Each function is realized in the separation of skill section, but still is restricted each other, including the arrangement spatially of each process section and the design etc. of HRT;
3)There are the contention in carbon source, polyP bacterias can only utilize the volatile fatty acid in organic matter, other forms for denitrogenation dephosphorizing
Organic matter need first to be hydrolyzed into volatile fatty acid, could be utilized by polyP bacteria;Requirement of the denitrification flora to carbon source is slightly lower
In polyP bacteria, but low-carbon organic matter can only be also utilized, there are the contentions of carbon source quality and quantity between denitrification flora and polyP bacteria group;
General to require, biological denitrificaion requires water inlet C/N>4, water inlet C/N> is required when biological carbon and phosphorous removal;7, and domestic general sanitary sewage
Water inlet C/N Pu Bians <4, belong to carbon source deficiency, needs outer throwing carbon source;Nitrifying bacteria community is autotrophy, does not need organic carbon source, and organic
Carbon source can generate nitrifying bacteria community the inhibition of metabolism when being more than a certain amount of.
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 demands, reduces the carbon source consumption of sewage disposal;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 to generate.
In addition, by the isometric sludge age flora of nitrifying bacteria community, detach, realizes with the short sludge age flora such as denitrification flora, polyP bacteria
Sludge age detaches.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 areas 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 lead to have excessive organic matter to flow into nitrification region, influence system nitrification function;But it sets
If timing considers nitrification design when C/N high, nitrification region pool capacity is necessarily will increase, 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, you can ensures
Treatment effect can also reduce investment, improve operational efficiency.
Invention content
Based on above-mentioned technical problem, the present invention provides a kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability.
The adopted technical solution is that:
A kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability, which is characterized in that water inlet passes sequentially through the reaction tank of system
(S0), secondary settling tank (S2) realizes the removal of pollutant;The system comprises surmount sludge operational mode and reflux nitrification liquid operation
Pattern;
Described to surmount sludge operational mode, a water inlet part enters pre- anoxic zone (PreA) by branch's water inlet pipe (P2), one
Divide and anaerobic zone (AP) is directly entered by main water inlet tube (P1);Mud return line (P5) flows back returned sludge from secondary settling tank (S2)
Enter 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);In advance
Mud mixture in anoxic zone (PreA) enters anaerobic zone (AP) by pre- anoxic zone anaerobic zone hole (K1);Anaerobic zone (AP)
Interior mud mixture enters the areas Zhong Chen (S1) by the anaerobic zone areas Zhong Chen hole (K2), and after precipitation, supernatant sinks in passing through
Aerobic nitrification area of area hole (K3) drop enters aerobic nitrification area (ON), and the sludge of sedimentation enters super by sludge after bucket (ND)
More pipe (P4) is directly entered denitrification zone (ANP) front bottom end;Water in aerobic nitrification area (ON) passes through the anti-nitre in aerobic nitrification area
Change the aerobic nitrification area denitrification zone porous plate (W1) that area's hole (K4) is equipped with and enter the front end denitrification zone (ANP), and anti-
Before nitrification zone inlet damper (D2) with the sludge that pipe (P4) surmounts surmounted by sludge mix;The muddy water of denitrification zone (ANP) is mixed
It closes object and aerobic decarburization area (OC) is entered by the aerobic decarburization area hole (K5) in denitrification zone;The muddy water of aerobic decarburization area (OC) mixes
The aerobic decarburization area exhalant region porous plate (W2) that object is equipped with by aerobic decarburization area exhalant region hole (K6), into exhalant region
(CS), secondary settling tank (S2) is flowed into from exhalant region (CS) through low liquid level connecting tube (P7), it is finally processed to be discharged from secondary settling tank
(S2) outlet pipe (P3) discharge;Pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP) blender are opened;It is aerobic
Nitrification zone (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) are in low liquid level (L) operation;Sludge surmounts
Pipe (P4) water (flow) direction flows to denitrification zone (ANP) by the areas Zhong Chen (S1);
The reflux nitrification liquid operational mode, a water inlet part enter pre- anoxic zone (PreA) by branch's water inlet pipe (P2), and one
Part is directly entered anaerobic zone (AP) by main water inlet tube (P1);Mud return line (P5) returns returned sludge from secondary settling tank (S2)
Pre- anoxic zone (PreA) is flowed into, and is quickly mixed before pre- anoxic zone inlet damper (D1) with the water inlet of branch's water inlet pipe (P2);
Mud mixture in pre- anoxic zone (PreA) enters anaerobic zone (AP) by pre- anoxic zone anaerobic zone hole (K1);Anaerobic zone
(AP) interior mud mixture enters the areas Zhong Chen (S1) by the anaerobic zone areas Zhong Chen hole (K2);Muddy water mixing in the areas Zhong Chen (S1)
Object enters aerobic nitrification area (ON) by aerobic nitrification area of the areas Zhong Chen hole (K3);Mud mixture in aerobic nitrification area (ON)
Enter denitrification by the aerobic nitrification area denitrification zone porous plate (W1) that aerobic nitrification area denitrification zone hole (K4) is equipped with
The front end area (ANP);A mud mixture part for denitrification zone (ANP) surmounts pipe (P4) by sludge and is back to the areas Zhong Chen (S1)
At bucket (ND), a part enters aerobic decarburization area (OC) by the aerobic decarburization area hole (K5) in denitrification zone;Aerobic decarburization area
(OC) the aerobic decarburization area exhalant region porous plate that mud mixture is equipped with by aerobic decarburization area exhalant region hole (K6)
(W2), into exhalant region (CS), secondary settling tank (S2) is flowed into from exhalant region (CS) through high liquid level connecting tube (P8), it is last processed
Water outlet is discharged from the outlet pipe (P3) of secondary settling tank (S2);Pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP), in sink
Area (S1) blender is opened;Aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) are in
High liquid level (H) is run;Sludge surmounts pipe (P4) water (flow) direction and flows to the areas Zhong Chen (S1) by denitrification zone (ANP).
Preferably, pre- anoxic zone (PreA) residence time is 0.5-1.0h, and anaerobic zone (AP) residence time is
1.5-2.5h, the areas Zhong Chen (S1) residence time be 2.0-4.0h, 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 0.0004-0.0012kgN/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 according to the determination of denitrification zone (ANP) denitrification sludge loading, anti-nitre
Change area (ANP) denitrification sludge loading is 0.03-0.06kgN/kgMLSS/d.
Preferably, when system by it is described surmount sludge operational mode operation when, aerobic nitrification area (ON) the Wu Ninongdu <
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 4-12d in system;Flow of inlet water is Q, and main water inlet tube (P1) flow is 80%-90%Q, dirty
Mud return duct (P5) flow is 30%-120%Q, and sludge surmounts 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, and the DO of the aerobic decarburization area (OC) is 1.5-4.5mg/L, described
The DO of exhalant region (CS) is 1.0-3.0mg/L;When the water outlet aerobic nitrification zone (ON) ammonia nitrogen;When 1.5mg/L, DO is reduced, every time
It reduces and is no more than 15%, every time adjustment interval at least 4h;When the water outlet aerobic nitrification zone (ON) ammonia nitrogen;When 3mg/L, DO is improved, often
Secondary improve is no more than 15%, every time adjustment interval at least 4h;Total tp removal rate;90% or water outlet TP<1mg/L, Δ BOD/ Δs TN<4;
The areas system Nei Ge maximum stream flow flux is no more than 2.2Q;The sludge Han Linshuai > of returned sludge;4%;
When system by the reflux nitrification liquid operational mode run when, the anaerobic zone (AP), denitrification zone (ANP), it is aerobic take off
Carbon area (OC), exhalant region (CS) sludge concentration be 3-8g/L;The sludge age of suspended sludge is 8-15d in system;Flow of inlet water
For Q, main water inlet tube (P1) flow is 80%-90%Q, and mud return line (P5) flow is 30%-120%Q, and sludge surmounts pipe (P4) stream
Amount is 100%-300%Q;The DO of the aerobic nitrification area (ON) is 2.0-6.0mg/L, and the DO of the aerobic decarburization area (OC) is
The DO of 1.5-4.5mg/L, the exhalant region (CS) are 1.0-3.0mg/L;When the water outlet aerobic nitrification zone (ON) ammonia nitrogen;1.5mg/
When L, DO is reduced, reduces be no more than 15% every time, every time adjustment interval at least 4h;When the water outlet aerobic nitrification zone (ON) ammonia nitrogen;
When 3mg/L, DO is improved, improves be no more than 15% every time, every time adjustment interval at least 4h;Total tp removal rate;75% or water outlet TP<
1.5mg/L, Δ BOD/ Δs TN<5;The areas system Nei Ge maximum stream flow flux is no more than 5Q;The sludge Han Linshuai > of returned sludge;
2.5%。
A kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability, which is characterized in that adjusted and run according to following steps
Pattern:
1)Initial option operational mode, when intake C/N≤4 when, by surmounting sludge operational mode;As water inlet C/N>When 4, by reflux
Nitrification liquid operational mode;
2)Surmount sludge operational mode and switches to reflux nitrification liquid operational mode, when system is by the operation of sludge operational mode is surmounted,
When aerobic nitrification zone (ON) DO is 5.5-6.0mg/L, the water outlet aerobic nitrification area (ON) ammonia nitrogen is still;When 3mg/L, reflux is switched to
Nitrification liquid operational mode;
3)Reflux nitrification liquid operational mode, which switches to, surmounts sludge operational mode, when system is by reflux nitrification liquid operational mode, when
Aerobic nitrification area (ON) DO is 2.0-2.5mg/L, the water outlet aerobic nitrification area (ON) ammonia nitrogen Reng <When 1.5mg/L, switches to and surmount
Sludge operational mode.
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 settles, and stirring or a small amount of aeration can be arranged;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 in, and porous plate suqare is according to mass-flux and crosses orifice meter
It calculates, general via 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, ensure 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 be determined present invention provide that in range 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 ensure under normal aeration condition, filler can not generate accumulation in pond, and filling rate needs≤60%;
Voidage, i.e. the voidage percentage of the total volume of unit volume suspending carrier, voidage is bigger, adds suspension and carries
Influence of the body to pool capacity is smaller, when such as voidage 90%, 1m3Pool capacity, when filling rate 100%, volume is shared by suspending carrier itself
0.1m3, when filling rate 50%, volume shared by suspending carrier itself is 0.05m3;
Specific surface area, i.e., the surface area that unit suspending carrier can be provided, the ratio with the unit volume of suspending carrier natural packing
Example, unit m2/m3;
Δ BOD/ Δ TN, i.e. (system water inlet BOD- systems are discharged BOD)/(system water inlet TN- systems are discharged TN), for tradition
A2General Δ BOD/ Δs TN> when/O techniques with denitrogenation are main;4, when good denitrification dephosphorization effect general Δ BOD/ Δs TN>7, work as Δ
BOD/ΔTN<Show that system realizes TN removals with lower carbon source demand when 4;
Mass-flux, actual flow synthesis when referring to each subregion actual motion in reaction tank including water inlet and all kinds of reflux;
For traditional A2/ O techniques, if flow of inlet water be Q1, return sludge ratio 100%, mixed liquid recycle ratio 300%, then anaerobic zone, lack
Oxygen area, aerobic zone mass-flux be 2Q1,5Q1,5Q1 respectively, maximum stream flow flux is 5Q1;For the present invention, if feed water flow
Amount is Q2, and the water inlet of pre- anoxic zone is 10%Q2, and anaerobic zone water inlet is 90%Q2, return sludge ratio 100%, and sludge surmounts pipe flow and is
100%Q2, then pre- anoxic zone, anaerobic zone, the areas Zhong Chen, aerobic nitrification area, denitrification zone, aerobic decarburization area mass-flux difference
For 1.1Q2,2Q2,2Q2, Q2,2Q2,2Q2, maximum stream flow flux is 2Q2;
The sludge age of suspended sludge in system does not consider the sludge age of suspended filler biofilm part, dense according only to system sludge
The sludge age for the suspended sludge that degree and sludge volume calculate;
Sludge phosphorus content, the i.e. phosphorus content of unit mass sludge, it is dirty if biological phosphor-removing effect is preferable in Biological Phosphorus Removal Processes
Mud phosphorus content is generally in 3-6%;For traditional A2/ O techniques, 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;Aerobic nitrification
Area nitrifies volume loading rate, i.e. flow of inlet water × (system influent ammonia nitrogen-system is discharged ammonia nitrogen)/aerobic nitrification area suspending carrier surface
The sum of product;
Organic area load, the i.e. biomembrane of per surface area, can aoxidize the amount of BOD, kgBOD/m daily2/ d, BOD are referred both to
BOD5;Aerobic decarburization area organic area load, i.e. flow of inlet water × (1+ return sludge ratios) × (aerobic decarburization area water inlet BOD- is good
The sum of oxygen decarburization area 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/d daily;Instead
Nitrification zone denitrification sludge loading, i.e. flow of inlet water × (system water inlet TN- systems are discharged TN)/(denitrification zone pool capacity × anti-nitre
Change area's sludge concentration);
Water inlet C/N refers to system water inlet BOD/ systems water inlet TN, general to require, biological denitrificaion requirement water inlet C/N>4, biological denitrificaion
Water inlet C/N> is required when dephosphorization;7, and domestic general sanitary sewage water inlet C/N Pu Bians <4, belong 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 Wu Ninongdu <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, general suspended state Wu Ninongdu >
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, quickly consumption 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, quickly consumes 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 dissolving 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 quickly consumes 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 areas Zhong Chen (S1), sludge surmounts flow direction and stream in pipe (P4)
The mode of communicating of amount, the water level of each functional areas, reaction tank (S0) and secondary settling tank (S2);
When system, which is in, surmounts sludge operational mode, the areas Zhong Chen (S1) utilizes bucket (ND), reinforcement sludge precipitation and concentration, carries
High sludge surmounts sludge concentration in pipe (P4), reduces flow, and sludge surmounts pipe (P4) flow direction and flowed to instead by the areas Zhong Chen (S1) at this time
Nitrification 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 areas Zhong Chen (S1) and aerobic nitrification zone (ON), 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 areas Zhong Chen (S1) turn on agitator, the areas Zhong Chen (S1) is used as denitrification
Function, at this time sludge surmount pipe (P4) flow direction the areas Zhong Chen (S1) flowed to by denitrification zone (ANP), flow 100%-300%Q is
Tong Nei aerobic nitrifications area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) are in high liquid level (H), reaction
Pond (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 areas Zhong Chen (S1) water level all same, are in high liquid level
(H)。
When system, which is in, surmounts sludge operational mode, the areas 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 techniques is 15-
25d;The sludge Han Linshuai > of returned sludge;4%, show 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, nitrification load gradually carries
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/ Δs TN<5;The areas system Nei Ge maximum stream flow
Flux is no more than 5Q;The sludge Han Linshuai > of returned sludge;2.5%.
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 ratios) × (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 intakes BOD 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 wait for that load increase from now on improves filling rate;If system has higher requirements for occupation of land, 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 the C/N> in system;When 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 is still;3mg/L, this
When need strengthen aerobic nitrification area (ON) before organic matter removal effect and aerobic nitrification area (ON) nitrification ability.If
At the beginning of design, to ensure water problems, 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 from denitrification zone (ANP) to the areas Zhong Chen (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, surmount sludge operational mode and can get best removal effect and utilization of carbon source, and flow back
Nitrification liquid operational mode is then preferential to meet ammonia nitrogen removal effect, may reduce utilization of carbon source rate.
The method have the benefit that:
1)High-efficient denitrification and dephosphorization, TN Qu Chushuais >80%, TP Qu Chushuai >90%, it is far above traditional handicraft;
2)Energy saving in running, when using sludge operational mode is surmounted, maximum stream flow flux only 2.2Q in reaction tank of the present invention is remote low
In traditional A2The 15-25Q of the 5Q and conventional oxidation ditch technique of/O techniques;For floating stuffing area, since DO directly affects nitre
Change load, DO can be adjusted flexibly according to influent load, realizes energy-saving;
3)Low-carbon is run, water inlet C/N required when denitrogenating phosphorus can be effectively reduced;Traditional handicraft can be realized efficient de-
When nitrogen dephosphorization, need to intake C/N>7, it, can be in water inlet C/N< for the present invention;High-efficient denitrification and dephosphorization is completed when 4;
4)Load is high, takes up an area province, and the separation of microorganisms of nitrogen and phosphors removal system, nitrifying process is dependent on aerobic nitrification area suspending carrier
Nitrifying bacteria community, denitrification process and dephosphorization process depend on suspended sludge, and suspended sludge does not enter aerobic nitrification area, realize
Thorough autotrophy flora is detached with heterotrophism flora, is conducive to independent control, is created respective optimum condition for respective flora, is handled load
Height reduces 20%-40% compared with traditional handicraft and takes up an area;
5)It realizes denitrification dephosphorization, creates the region of high phosphate, nitrate, organic concentration, created for denitrification dephosphorization
Good condition;Traditional handicraft is bigger due to always flowing back, and denitrification zone is difficult to realize high concentration region;The present invention effectively reduces
Mass-flux can realize Super matrix concentration, and anaerobic zone sludge absorption large amount of organic, be directly entered denitrification zone, improve
Utilization of carbon source efficiency;
6)TN removal rates are not limited by when aerobic/non-aerobic ratio that flows back, traditional A2/ O techniques are anoxic zone by reflux type
Nitrate is provided, to ensure that continuous flow plug-flow state, general total reflux ratio are no more than 400%, theoretically TN removal rates are no more than
80%;The present invention uses single flow to provide nitrate for denitrification zone, and TN removal rates are not limited by reflux ratio;Traditional A2/ O techniques
Consider nitrifying bacteria community eubolism, it is desirable that aerobic HRT>Non- aerobic HRT, due to realizing flora separation, system is no longer by secondary limit
System;
7)Control is simple, is easy to operational management conveniently, compares driving by double-energy, single-stage Biosystems control is simple;Compared to fixed
Filler, operational management is convenient, and the update of dynamic biological film, the anxiety without dead mud or blocking are realized by suspending carrier fluid mapper process;
8)Flexible operation, for water inlet C/N difference and system nitrification ability, flexible arrangement operational mode.
Description of the drawings
Fig. 1 is the flow sheet of the present invention.
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 areas 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 intake for branch
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 connects for low liquid level
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 areas Zhong Chen are 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 anaerobic zone areas Zhong Chen hole, and K3 is the areas 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 areas Zhong Chen blender, and H is high liquid level, and L is low liquid level.
Specific implementation mode
In order to make the purpose of the present invention, technical solution and advantage become apparent from, it is clear, below with reference to specific embodiment,
The present invention is described in more detail.
The present invention provides a kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability, can solve traditional denitrification dephosphorization technique
The problems such as efficiency is low, outer throwing carbon source amount height, the big increase energy consumption of reflux ratio, denitrogenation dephosphorizing are difficult to take into account, it is de- suitable for saprobia
Nitrogen dephosphorization and sewage treatment plant's upgrading.
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..The present invention, in conjunction with shown in Fig. 1,
System is made of reaction tank (S0), secondary settling tank (S2) and connecting line;Reaction tank (S0) is followed successively by pre- from water inlet end to water outlet
Anoxic zone (PreA), anaerobic zone (AP), the areas 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 areas Zhong Chen (S1) are equipped with
Blender;The areas Zhong Chen (S1) bottom is equipped with bucket (ND), and the areas 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) suspending carrier is added;The suspending vehicle density is 0.90-0.98g/cm3, Kong Xishuai >85%, filling rate is in 10%-
60%, specific surface area >=300m2/m3;
The pre- anoxic zone that the pre- anoxic zone (PreA) and anaerobic zone (AP) are equipped with by pre- anoxic zone anaerobic zone partition wall (G1)
Anaerobic zone hole (K1) communicates;The anaerobic zone (AP) and the areas Zhong Chen (S1) separate what wall (G2) was equipped with by sinking in anaerobic zone
The anaerobic zone areas Zhong Chen hole (K2) communicates;The areas Zhong Chen (S1) and aerobic nitrification zone (ON) are separated by the areas Zhong Chen aerobic nitrification
Aerobic nitrification area of the areas 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 centre-to-centre spacing bottom of pond distance of the areas Zhong Chen hole (K2) is the 50-60% of anaerobic zone (AP) available depth;The areas Zhong Chen aerobic nitrification
The lower edge of area's hole (K3) is identical as anaerobic zone (AP) available depth away from bottom of pond distance;Aerobic nitrification area denitrification zone hole
(K4) upper edge 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface;The aerobic decarburization area in denitrification zone hole
The upper edge in hole (K5) 0.5m-1.5m below denitrification zone (ANP) low liquid level (L) water surface;The aerobic decarburization area exhalant region hole
The upper edge in 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 areas 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) passes through low liquid level connecting tube (P7), high liquid level connecting tube respectively with secondary settling tank (S2)
(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.
Pre- anoxic zone (PreA) front end 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;Denitrification zone (ANP) front end 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 areas 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 bigger 0.2-0.4m than low liquid level (L) absolute altitude.
Described to surmount sludge operational mode, a water inlet 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)
Pre- anoxic zone (PreA) is passed back into, 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 areas Zhong Chen (S1) by the anaerobic zone areas Zhong Chen hole (K2), and after precipitation, supernatant is logical
Aerobic nitrification area of the areas 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 going 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 areas Zhong Chen (S1);
The reflux nitrification liquid operational mode, a water inlet part enter pre- anoxic zone (PreA) by branch's water inlet pipe (P2), and one
Part is directly entered anaerobic zone (AP) by main water inlet tube (P1);Mud return line (P5) returns returned sludge from secondary settling tank (S2)
Pre- anoxic zone (PreA) is flowed into, and is quickly mixed before pre- anoxic zone inlet damper (D1) with the water inlet of branch's water inlet pipe (P2);
Mud mixture in pre- anoxic zone (PreA) enters anaerobic zone (AP) by pre- anoxic zone anaerobic zone hole (K1);Anaerobic zone
(AP) interior mud mixture enters the areas Zhong Chen (S1) by the anaerobic zone areas Zhong Chen hole (K2);Muddy water mixing in the areas Zhong Chen (S1)
Object enters aerobic nitrification area (ON) by aerobic nitrification area of the areas Zhong Chen hole (K3);Mud mixture in aerobic nitrification area (ON)
Enter denitrification by the aerobic nitrification area denitrification zone porous plate (W1) that aerobic nitrification area denitrification zone hole (K4) is equipped with
The front end area (ANP);A mud mixture part for denitrification zone (ANP) surmounts pipe (P4) by sludge and is back to the areas Zhong Chen (S1)
At bucket (ND), a part enters aerobic decarburization area (OC) by the aerobic decarburization area hole (K5) in denitrification zone;Aerobic decarburization area
(OC) the aerobic decarburization area exhalant region porous plate that mud mixture is equipped with by aerobic decarburization area exhalant region hole (K6)
(W2), into exhalant region (CS), secondary settling tank (S2) is flowed into from exhalant region (CS) through high liquid level connecting tube (P8), it is last processed
Water outlet is discharged from the outlet pipe (P3) of secondary settling tank (S2);Pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP), in sink
Area (S1) blender is opened;Aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) are in
High liquid level (H) is run;Sludge surmounts pipe (P4) water (flow) direction and flows to the areas Zhong Chen (S1) by denitrification zone (ANP).
Embodiment 1:
Discharge of sewage Q is 100000m3/ d, be sanitary sewage, water inlet mean value be ammonia nitrogen 45mg/L, TN55mg/L, TP6mg/L,
BOD160mg/L, Effluent criteria are An Dan <3mg/L,TN<10mg/L,TP<0.5mg/L,BOD<10mg/L, water inlet BOD/TN=
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 areas 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-
The DO of 4.5mg/L, exhalant region (CS) are 1.0-3.0mg/L.
The areas system Nei Ge maximum stream flow flux is 1.9Q;The sludge phosphorus content 4.8% of returned sludge.
Water outlet TN mean values be 8.2mg/L, water outlet TP mean values be 0.4mg/L, water outlet BOD mean values be 6mg/L, TP removal rates=
Δ TP/ water inlets TP=(6-0.4)/6=93.3%, Δ BOD/ Δs TN=(160-6)/(55-8.2)=3.29.
Embodiment 2:
The operation of embodiment 1 meets with influent quality impact to 300d, and larger change occurs for influent quality, and water inlet BOD reaches 200mg/
L, the variation of other index averages is little, and aerobic nitrification area (ON) DO is 5.5-6.0mg/L, the water outlet aerobic nitrification area (ON) at this time
Ammonia nitrogen is 4.5mg/L Rengs >3mg/L, total ammonia nitrogen that is discharged is by < before;1mg/L is improved to 3.5mg/L, switches to reflux nitrification liquid
Operational mode;
When the nitrification liquid operational mode that flows back, the sludge age of suspended sludge increases to as 12-15d in system;Flow of inlet water is Q, it is main into
Water pipe (P1) flow is 80%-90%Q, and mud return line (P5) flow is 70%-90%Q, and it is 200% that sludge, which surmounts pipe (P4) flow,
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 be 1.0-3.0mg/L;System stably reaching standard, the water outlet aerobic nitrification area (ON) ammonia nitrogen are gradually down to 3mg/L hereinafter, always going out
Water ammonia nitrogen is down to 1mg/L or less;After running 30d, system influent quality restores normal, ensures aerobic nitrification under the premise for the treatment of effect
The DO in area (ON) is gradually reduced to 2.0-2.5mg/L, switches to and surmounts sludge operational mode.
Water outlet TN mean values are 9.6mg/L, and water outlet TP mean values are 1.36mg/L, and water outlet BOD mean values are 10mg/L, TP removal rates
The TP/ water inlets of=Δ TP=(6-1.36)/6=77.3%, Δ BOD/ Δs 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 values be 8.1mg/L, water outlet TP mean values be 0.31mg/L, water outlet BOD mean values be 5mg/L, TP removal rates=
Δ TP/ water inlets TP=(6-0.31)/6=94.8%, Δ BOD/ Δs 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, those skilled in the art simply replace to what these terms were done under the inspiration of the present invention
It changes, it should all be within protection scope of the present invention.Prior art is taken or used for reference in the part that do not addressed in aforesaid way can be real
It is existing.The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that this technology is led
For the those of ordinary skill in domain, without departing from the technical principles of the invention, several improvements and modifications can also be made,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability, which is characterized in that water inlet passes sequentially through the reaction of system
Pond (S0), secondary settling tank (S2), realize the removal of pollutant;The system comprises surmount sludge operational mode and reflux nitrification liquid fortune
Row pattern;
Described to surmount sludge operational mode, a water inlet part enters pre- anoxic zone (PreA) by branch's water inlet pipe (P2), one
Divide and anaerobic zone (AP) is directly entered by main water inlet tube (P1);Mud return line (P5) flows back returned sludge from secondary settling tank (S2)
Enter 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);In advance
Mud mixture in anoxic zone (PreA) enters anaerobic zone (AP) by pre- anoxic zone anaerobic zone hole (K1);Anaerobic zone (AP)
Interior mud mixture enters the areas Zhong Chen (S1) by the anaerobic zone areas Zhong Chen hole (K2), and after precipitation, supernatant sinks in passing through
Aerobic nitrification area of area hole (K3) drop enters aerobic nitrification area (ON), and the sludge of sedimentation enters super by sludge after bucket (ND)
More pipe (P4) is directly entered denitrification zone (ANP) front bottom end;Water in aerobic nitrification area (ON) passes through the anti-nitre in aerobic nitrification area
Change the aerobic nitrification area denitrification zone porous plate (W1) that area's hole (K4) is equipped with and enter the front end denitrification zone (ANP), and anti-
Before nitrification zone inlet damper (D2) with the sludge that pipe (P4) surmounts surmounted by sludge mix;The muddy water of denitrification zone (ANP) is mixed
It closes object and aerobic decarburization area (OC) is entered by the aerobic decarburization area hole (K5) in denitrification zone;The muddy water of aerobic decarburization area (OC) mixes
The aerobic decarburization area exhalant region porous plate (W2) that object is equipped with by aerobic decarburization area exhalant region hole (K6), into exhalant region
(CS), secondary settling tank (S2) is flowed into from exhalant region (CS) through low liquid level connecting tube (P7), it is finally processed to be discharged from secondary settling tank
(S2) outlet pipe (P3) discharge;Pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP) blender are opened;It is aerobic
Nitrification zone (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) are in low liquid level (L) operation;Sludge surmounts
Pipe (P4) water (flow) direction flows to denitrification zone (ANP) by the areas Zhong Chen (S1);
The reflux nitrification liquid operational mode, a water inlet part enter pre- anoxic zone (PreA) by branch's water inlet pipe (P2), and one
Part is directly entered anaerobic zone (AP) by main water inlet tube (P1);Mud return line (P5) returns returned sludge from secondary settling tank (S2)
Pre- anoxic zone (PreA) is flowed into, and is quickly mixed before pre- anoxic zone inlet damper (D1) with the water inlet of branch's water inlet pipe (P2);
Mud mixture in pre- anoxic zone (PreA) enters anaerobic zone (AP) by pre- anoxic zone anaerobic zone hole (K1);Anaerobic zone
(AP) interior mud mixture enters the areas Zhong Chen (S1) by the anaerobic zone areas Zhong Chen hole (K2);Muddy water mixing in the areas Zhong Chen (S1)
Object enters aerobic nitrification area (ON) by aerobic nitrification area of the areas Zhong Chen hole (K3);Mud mixture in aerobic nitrification area (ON)
Enter denitrification by the aerobic nitrification area denitrification zone porous plate (W1) that aerobic nitrification area denitrification zone hole (K4) is equipped with
The front end area (ANP);A mud mixture part for denitrification zone (ANP) surmounts pipe (P4) by sludge and is back to the areas Zhong Chen (S1)
At bucket (ND), a part enters aerobic decarburization area (OC) by the aerobic decarburization area hole (K5) in denitrification zone;Aerobic decarburization area
(OC) the aerobic decarburization area exhalant region porous plate that mud mixture is equipped with by aerobic decarburization area exhalant region hole (K6)
(W2), into exhalant region (CS), secondary settling tank (S2) is flowed into from exhalant region (CS) through high liquid level connecting tube (P8), it is last processed
Water outlet is discharged from the outlet pipe (P3) of secondary settling tank (S2);Pre- anoxic zone (PreA), anaerobic zone (AP), denitrification zone (ANP), in sink
Area (S1) blender is opened;Aerobic nitrification area (ON), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) are in
High liquid level (H) is run;Sludge surmounts pipe (P4) water (flow) direction and flows to the areas Zhong Chen (S1) by denitrification zone (ANP).
2. a kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability according to claim 1, which is characterized in that described
Pre- anoxic zone (PreA) residence time is 0.5-1.0h, and anaerobic zone (AP) residence time is 1.5-2.5h, the areas Zhong Chen
(S1) residence time is 2.0-4.0h, aerobic decarburization area (OC) the residence time 0.5-2.0h, and the exhalant region (CS) stops
Time≤0.5h;Aerobic nitrification area (ON) residence time nitrifies volume loading rate according to aerobic nitrification area (ON) and determines, aerobic nitrification
It is 0.0004-0.0012kgN/m that area (ON), which nitrifies volume loading rate,2/d;Aerobic decarburization area (OC) residence time is according to aerobic decarburization
Area (OC) organic area load determines that aerobic decarburization area (OC) organic area load is 0.004-0.012kgBOD/m2/d;Anti- nitre
Change area's (ANP) residence time according to the determination of denitrification zone (ANP) denitrification sludge loading, denitrification zone (ANP) denitrification sludge
Load is 0.03-0.06kgN/kgMLSS/d.
3. a kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability according to claim 1, which is characterized in that when being
System by it is described surmount sludge operational mode operation when, aerobic nitrification area (ON) the Wu Ninongdu <0.5g/L, the anaerobic zone
(AP), denitrification zone (ANP), aerobic decarburization area (OC), exhalant region (CS) sludge concentration be 3-8g/L;Suspended sludge in system
Sludge age be 4-12d;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 aerobic nitrification area (ON)
DO be 2.0-6.0mg/L, the DO of the aerobic decarburization area (OC) is 1.5-4.5mg/L, and the DO of the exhalant region (CS) is
1.0-3.0mg/L;When the water outlet aerobic nitrification zone (ON) ammonia nitrogen;When 1.5mg/L, DO is reduced, reduces be no more than 15% every time, often
Secondary adjustment is spaced at least 4h;When the water outlet aerobic nitrification zone (ON) ammonia nitrogen;When 3mg/L, DO is improved, improves be no more than 15% every time,
Adjustment interval at least 4h every time;Total tp removal rate;90% or water outlet TP<1mg/L, Δ BOD/ Δs TN<4;The areas system Nei Ge max-flow
It measures flux and is no more than 2.2Q;The sludge Han Linshuai > of returned sludge;4%;
When system by the reflux nitrification liquid operational mode run when, the anaerobic zone (AP), denitrification zone (ANP), it is aerobic take off
Carbon area (OC), exhalant region (CS) sludge concentration be 3-8g/L;The sludge age of suspended sludge is 8-15d in system;Flow of inlet water
For Q, main water inlet tube (P1) flow is 80%-90%Q, and mud return line (P5) flow is 30%-120%Q, and sludge surmounts pipe (P4) stream
Amount is 100%-300%Q;The DO of the aerobic nitrification area (ON) is 2.0-6.0mg/L, and the DO of the aerobic decarburization area (OC) is
The DO of 1.5-4.5mg/L, the exhalant region (CS) are 1.0-3.0mg/L;When the water outlet aerobic nitrification zone (ON) ammonia nitrogen;1.5mg/
When L, DO is reduced, reduces be no more than 15% every time, every time adjustment interval at least 4h;When the water outlet aerobic nitrification zone (ON) ammonia nitrogen;
When 3mg/L, DO is improved, improves be no more than 15% every time, every time adjustment interval at least 4h;Total tp removal rate;75% or water outlet TP<
1.5mg/L, Δ BOD/ Δs TN<5;The areas system Nei Ge maximum stream flow flux is no more than 5Q;The sludge Han Linshuai > of returned sludge;
2.5%。
4. a kind of sewage water treatment method of adjustable nitrogen phosphorus ligands ability according to claim 1, which is characterized in that according to
Following steps adjust operational mode:
1)Initial option operational mode, when intake C/N≤4 when, by surmounting sludge operational mode;As water inlet C/N>When 4, by reflux
Nitrification liquid operational mode;
2)Surmount sludge operational mode and switches to reflux nitrification liquid operational mode, when system is by the operation of sludge operational mode is surmounted,
When aerobic nitrification zone (ON) DO is 5.5-6.0mg/L, the water outlet aerobic nitrification area (ON) ammonia nitrogen is still;When 3mg/L, reflux is switched to
Nitrification liquid operational mode;
3)Reflux nitrification liquid operational mode, which switches to, surmounts sludge operational mode, when system is by reflux nitrification liquid operational mode, when
Aerobic nitrification area (ON) DO is 2.0-2.5mg/L, the water outlet aerobic nitrification area (ON) ammonia nitrogen Reng <When 1.5mg/L, switches to and surmount
Sludge operational mode.
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