CN109879421A - It is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system - Google Patents
It is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system Download PDFInfo
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- CN109879421A CN109879421A CN201910170671.5A CN201910170671A CN109879421A CN 109879421 A CN109879421 A CN 109879421A CN 201910170671 A CN201910170671 A CN 201910170671A CN 109879421 A CN109879421 A CN 109879421A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 40
- 239000010865 sewage Substances 0.000 claims abstract description 21
- 238000010992 reflux Methods 0.000 claims description 38
- 230000000694 effects Effects 0.000 claims description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 244000005700 microbiome Species 0.000 claims description 18
- 238000006396 nitration reaction Methods 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 17
- 206010002660 Anoxia Diseases 0.000 claims description 13
- 241000976983 Anoxia Species 0.000 claims description 13
- 206010021143 Hypoxia Diseases 0.000 claims description 13
- 230000007953 anoxia Effects 0.000 claims description 13
- 238000013019 agitation Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims description 11
- 239000011574 phosphorus Substances 0.000 claims description 11
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 239000010802 sludge Substances 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000005416 organic matter Substances 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000036284 oxygen consumption Effects 0.000 claims description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000004065 wastewater treatment Methods 0.000 description 6
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000002906 microbiologic effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 229920000037 Polyproline Polymers 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The present invention relates to a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system, belong to return-flow system in technical field of sewage, including pre- anoxic pond, anaerobic pond, the first anoxic pond, the first aerobic tank, deoxidation pond, the second anoxic pond, the second aerobic tank, external carbon source dosing system and mixed liquor.Wherein, pre- anoxic pond, anaerobic pond, the first anoxic pond, the first aerobic tank, deoxidation pond, the second anoxic pond, the second aerobic tank are sequentially connected.The present invention for influent COD cr and intake the variation of TN concentration greatly, carbon-nitrogen ratio is relatively low, the universal phenomenon of the sewage treatment of high standard discharge, switched by deoxidation pond and the second anoxic pond in aerobic and anoxic two states, reply influent quality changes；Multipoint water feeding, optimization external carbon source toss area are realized the reasonable distribution of carbon source and are efficiently utilized.The present invention has many advantages, such as that excellent effluent quality, utilization of carbon source rate height, strong flexibility, production run are at low cost.
Description
Technical field
The present invention relates to a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system, belong to
Technical field of sewage.
Background technique
Nitrogen and phosphorus pollution is the main reason for causing water eutrophication and what the improvement of many polluted-waters faced mainly asks
Topic.The carbon-nitrogen ratio (C/N) of city domestic sewage is universal relatively low, and interior carbon source is insufficient in the generally existing sewage of sewage treatment plant asks
Topic, and denitrification process needs organic carbon source as the energy source of denitrifying bacterium and electron donor, if lacked in enough
Portion's carbon source carries out denitrification, needs to add external carbon source and realizes denitrification.It is thrown using multipoint water feeding system and in the second anoxic pond
Add external carbon source, interior carbon source can be made efficiently to be utilized, and save external carbon source dosage, improves utilization of carbon source efficiency,
Reduce operating cost.
It is shown according to related open source information, the existing urban wastewater treatment firm Chinese effluent in China executes " urban wastewater treatment
Factory's pollutant emission standard " in (GB18918-2002) water factory's treatment scale accounting of " level-one B " and following Effluent criteria up to three
/ bis-.Most of urban wastewater treatment firms, which face, proposes target problem, mentions and mainly improving from " level-one B " standard on mark path
" level-one A " standard into " urban wastewater treatment firm pollutant emission standard " (GB18918-2002), or mentioned from " level-one A " standard
IV class of surface water (except total nitrogen index) or higher water body mark up in " water environment quality standard " (GB3838-2002)
It is quasi-.It being capable of more efficient removal organic matter, ammonia nitrogen and total nitrogen using two-stage Anoxic/Aerobic (AO) technique.In identical influent quality condition
Under, pool capacity is smaller, and construction investment is lower.
Urban wastewater treatment firm influent quality, water temperature amplitude of variation are big at present, by the factors such as season and resident living mode
Influence, water inlet total nitrogen (TN) and COD (CODcr) concentration variation issue it is especially pronounced.When water inlet total nitrogen (TN) compared with
It is high, when carbon-nitrogen ratio (C/N) is low, anoxic pond in traditional anaerobic/anoxic/aerobic (AAO) technique is difficult to meet denitrification need
It asks, and higher to the consumption of carbon source；And when water inlet total nitrogen (TN) lower, COD (CODcr) concentration is higher and water temperature compared with
When low, then the residence time of aerobic tank answers relatively long.In face of the variation of influent quality concentration, water temperature variation, fixed mode life
Change pond combination to be difficult to meet, if anoxic pond part pond body can be converted between anoxic and aerobic two states in biochemistry pool,
And cooperate return-flow system in mixed liquor, then it can solve the problems, such as that high water inlet total nitrogen (TN) concentration, influent quality and water temperature fluctuation are big.
In traditional anaerobic/anoxic/aerobic (AAO) sewage treatment process, denitrifying bacterium and polyP bacteria are in organic loading, mud
There is contradictions and competition on age and carbon source demand, and nitrogen, phosphorus is made to be difficult in the same system efficiently removal simultaneously.Therefore, exist
Pre- anoxic pond is added before anaerobic pond, the returned sludge from secondary settling tank enters pre- anoxic with by pretreated sewage jointly
Pond, microorganism eliminate nitrate nitrogen to subsequent anaerobic phosphorus release using the nitrate nitrogen carried in organic matter removal returned sludge in water inlet
Adverse effect, to guarantee anaerobic pond treatment effect.
To guarantee nitric efficiency, return-flow system is needed to be arranged from aerobic tank end in mixed liquor to anoxic pond, traditional anaerobism/
Under the conditions of anoxic/aerobic (AAO) biochemical process, mixed liquor reflux point is arranged in aerobic tank end, and dissolved oxygen concentration is relatively high,
A part of carbon source can be consumed and cause anoxia condition bad by flowing back into anoxic pond, influence denitrification effect.By the way that deoxidation pond, energy is arranged
It is enough effectively to solve the problems, such as that interior backflow mixed liquor dissolved oxygen is excessively high.
Summary of the invention
Object of the present invention is to overcome the deficiencies in the prior art, provide a kind of based on multipoint water feeding and multi-mode operation
Can intensified anti-nitrated denitrification dephosphorization system.By the way that pre- anoxic pond is arranged before traditional anaerobic/anoxic/aerobic (AAO), will get well
Oxygen pond is adjusted to the first aerobic tank/first anoxic pond/second aerobic tank, and deoxidation pond is arranged after the first aerobic tank.In reality
In the application of border, if water inlet total nitrogen (TN) concentration is higher, stop increasing always stopping for anoxic to the aeration in deoxidation pond and the second anoxic pond
Stay the time；If total nitrogen (TN) concentration of intaking is lower, carbon-nitrogen ratio (C/N) is higher, then opens to deoxidation pond and the second anoxic pond
Aeration, and adjust backwash deployment in mixed liquor.Carbon-nitrogen ratio (C/N) low water quality is coped with, external carbon source is preferentially added to second
Anoxic pond.
By increasing pre- anoxic pond, nitrate nitrogen in returned sludge is eliminated to the adverse effect of subsequent anaerobic phosphorus release, to protect
Demonstrate,prove the anaerobism degree of anaerobic pond；By increasing the residence time of anoxic pond, intensified anti-nitrated effect improves total nitrogen (TN) removal effect
Fruit；By in deoxidation pond, the second anoxic pond setting stirring and aeration dual system, can anoxic and it is aerobic between convert, and match
The adjustment for closing reflux point in mixed liquor makes biochemical system adapt to influent quality and fluctuates biggish sewage；It is added by optimizing carbon source
Position farthest utilizes carbon source, solves the problems, such as that water inlet carbon-nitrogen ratio (C/N) is low；By being set in the first aerobic tank end
Deoxidation pond is set, solves the problems, such as that interior backflow mixed liquor dissolved oxygen is excessively high.
According to technical solution provided by the invention, the high-efficient denitrification and dephosphorization system that can be intensified anti-nitrated, feature
It is: including pre- anoxic pond (2), anaerobic pond (3), the first anoxic pond (4), the first aerobic tank (5), deoxidation pond (6), the second anoxic pond
(7), the second aerobic tank (8), interior reflux well (9), external carbon source dosing system (11), return-flow system (9.1) etc. in mixed liquor.In advance
Anoxic pond (2) is connect with anaerobic pond (3), and anaerobic pond (3) is connect with the first anoxic pond (4), the first anoxic pond (4) and first aerobic
Pond (5) connection, the first aerobic tank (5) are connect with deoxidation pond (6), and deoxidation pond (6) are connect with the second anoxic pond (7), the second anoxic
Pond (7) is connect with the second aerobic tank (8).External carbon source dosing system (11.1) is preferentially added to the second anoxic pond (7), exterior carbon
Source dosing system (11.2) is secondly added to the first anoxic pond (4), and external carbon source dosage should keep making sewage carbon-nitrogen ratio (C/
It N) is 3~3.5.
Return-flow system is interior reflux well (9), interior reflux line or interior reflux canal and interior reflux pump in the mixed liquor
(9.1), interior backwash deployment is adjusted according to influent quality variation, can enter interior reflux well (9) simultaneously from deoxidation pond end (6.1)
The first anoxic pond (4) are back to by interior reflux line or channel (9.1)；Or enter interior return from the second aerobic tank end (8.1)
Stream well (9) is simultaneously back to the first anoxic pond (4) by interior reflux line or channel (9.1).
The system can from pre- anoxic pond (2), anaerobic pond (3), the first anoxic pond (4), the second anoxic pond (7) simultaneously into
Water.
The individual submersible agitator of setting or impeller, good first in the pre- anoxic pond, anaerobic pond, the first anoxic pond
Stirring and aeration dual system is arranged in degassing pond and the second anoxic pond in the individual aerating system of setting in oxygen pond, the second aerobic tank,
By configuring realization multi-mode operation above.
The residence time of the pre- anoxic pond is 0.5h, and the anaerobic pond residence time is 1.0~1.5h, the deoxidation pond setting
After the first aerobic tank, the residence time in deoxidation pond is 0.5h；Second anoxic pond is arranged after deoxidation pond.
First anoxic pond is circular groove formula, and the first aerobic tank is pulling flow type, pre- anoxic pond, anaerobic pond, deoxidation pond, second
Anoxic pond is thoroughly mixed formula, and the second aerobic tank is pulling flow type.
It is the pre- anoxic pond, anaerobic pond, the first anoxic pond, the first aerobic tank, deoxidation pond, the second anoxic pond, second aerobic
Pond can be separately provided, and can also build jointly.
Embodiment one
A, sewage enters pre- anoxic pond, stops 0.5h under agitation, subsequently into anaerobic pond, stops under agitation
1.5h is stayed, anaerobic pond water outlet enters the first anoxic pond together with the interior backflow mixed liquor in deoxidation pond 200%, in anoxia stirring condition
Lower stop 6h carries out anti-nitration reaction and denitrogenation in the first anoxic pond in the case where microorganism concn MLSS is 3.5g/L effect；Wherein
200% refers to the ratio of interior backflow mixed liquor flow and flow of inlet water.
B, each point amount of inlet water ratio is as follows: pre- anoxic pond 10%, anaerobic pond 20%, the first anoxic pond 50%, second lack
Oxygen pond 20%.
C, the resulting first anoxic pond mixed liquor of step a enters the first aerobic tank, 8h is stopped under aerobic condition, in micro- life
Object MLSS, which is that 3.5g/L effect is lower, carries out oxidation operation, biological nitration and aerobic suction phosphorus reaction；
D, the resulting first aerobic tank mixed liquor of step c enters deoxidation pond, 0.5h is stopped under the conditions of anoxia stirring, micro-
Biological MLSS deoxidation for the lower progress oxygen consumption effect of 3.5g/L effect, after the completion of deoxidation, 200% mixed liquor is back to first and lacks
Oxygen pond front end, while the Dissolved Oxygen concentration Control in deoxidation pond is in 0.5mg/L.
E, the remainder of the resulting deoxidation pond mixed liquor of step d enters the second anoxic pond, in the item of anoxia stirring operation
1.5h is stopped under part, further progress anti-nitration reaction and denitrogenation in the case where microorganism MLSS is 3.5g/L effect, in the second anoxic
Pond adds the external carbon source for being equivalent to 15mg/LCOD equivalent.
F, the resulting second anoxic pond water outlet of step e enters the second aerobic tank, stops under the aerobic condition of the second aerobic tank
1h is stayed, the remaining carbon source oxidation of further progress organic matter and outside, biological nitration are anti-in the case where microorganism MLSS is 3.5g/L effect
It answers, while the Dissolved Oxygen concentration Control of the second aerobic tank is in 2mg/L.
G, the water outlet of the second aerobic tank enters secondary settling tank progress mud-water separation, lower layer's sludge reflux after separation to pre- anoxic
Pond, upper layer clear water are emitted into water body or advanced treating facility.
Embodiment two
A, sewage enters pre- anoxic pond, stops 0.5h under agitation, subsequently into anaerobic pond, stops under agitation
Stay 1.5h.
B, each point amount of inlet water ratio is as follows: pre- anoxic pond 10%, anaerobic pond 20%, the first anoxic pond 70%.
C, backflow mixed liquor and anaerobic pond are discharged and enter the first anoxic pond together in the 200% of the second aerobic tank reflux,
6h is stopped under the conditions of anoxia stirring, carries out anti-nitration reaction in the first anoxic pond in the case where microorganism MLSS is 3.5g/L effect and is taken off
Nitrogen；The wherein ratio of 200% finger interior backflow mixed liquor flow and flow of inlet water.
D, the first aerobic tank, deoxidation pond, the second anoxic pond, the second aerobic tank open aerating system.Under aerobic condition,
The resulting first anoxic pond mixed liquor of step c enters the first aerobic tank, deoxidation pond, the second anoxic pond, the second aerobic tank, total to stop
Time 11h carries out oxidation operation, biological nitration and aerobic suction phosphorus reaction in the case where microorganism MLSS is 3.5g/L effect；200%
Mixed liquor be back to the first anoxic pond front end in the second aerobic tank end；Meanwhile first aerobic tank, deoxidation pond, the second anoxic
Pond, the second aerobic tank Dissolved Oxygen concentration Control in 2mg/L.
E, the water outlet of the second aerobic tank enters secondary settling tank progress mud-water separation, lower layer's sludge reflux after separation to pre- anoxic
Pond, upper layer clear water are emitted into water body or advanced treating facility.
The present invention has the advantages that:
(1) it is dirty to eliminate reflux by the way that pre- anoxic pond is arranged before traditional anaerobic/anoxic/aerobic (AAO) technique by the present invention
Nitrate nitrogen is to the adverse effect of subsequent anaerobic phosphorus release in mud, to guarantee the anaerobism degree of anaerobic pond.
(2) present invention by aerobic tank in traditional anaerobic/anoxic/aerobic (AAO) technique be adjusted to the first aerobic tank/the second lack
Oxygen pond/the second aerobic tank, two-stage Anoxic/Aerobic (AO) technique can more efficient removal organic matter, keep nitric efficiency higher.In phase
Under the conditions of influent quality, pool capacity is smaller, and construction investment is lower.
(3) deoxidation pond is arranged in the present invention after the first aerobic tank, is able to solve interior backflow mixed liquor dissolved oxygen concentration mistake
The problem that height causes anoxic pond anoxia condition bad, to improve total nitrogen (TN) removal effect.
(4) present invention is in deoxidation pond and the second anoxic pond setting stirring and aeration dual system, and passes through weir of flowing back in adjusting
Door or valve adjust interior backwash deployment, to handle the sewage of different influent concentrations, different carbon-nitrogen ratios (C/N), realize multi-mode fortune
Row.
(5) external carbon source is preferentially added the second anoxic pond by optimization external carbon source dosing system by the present invention, is improved outer
Portion's utilization of carbon source rate.
(6) present invention can intake simultaneously from pre- anoxic pond, anaerobic pond, the first anoxic pond, the second anoxic pond multiple spot, Neng Gouyou
Effect changes influent quality, realizes the efficient utilization of interior carbon source.
(7) compared with general denitrification dephosphorization system, the present invention is excellent with effluent quality, utilization of carbon source rate is high, is applicable in model
The advantages that enclosing wide, strong flexibility, production run at low cost, is China's urban wastewater treatment firm, especially water inlet COD
(CODcr) and at total nitrogen (TN) concentration height, the water inlet sewage that carbon-nitrogen ratio (C/N) is low, influent quality concentration and water temperature fluctuation are big
The design of reason factory engineering and operational management are offered reference.
Detailed description of the invention
Fig. 1 be it is of the present invention it is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrogenation dephosphorizing system
The schematic diagram of system.
Specific embodiment
Below with reference to specific attached drawing, the invention will be further described.
As shown in Figure 1: it is described based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system include
Pre- anoxic pond (2), anaerobic pond (3), the first anoxic pond (4), the first aerobic tank (5), deoxidation pond (6), the second anoxic pond (7),
Reflux system in two aerobic tanks (8), interior reflux well (9), external carbon source dosing system (11), multipoint water feeding system (1) and mixed liquor
It unites (9.1) etc..
As shown in Figure 1, the present invention includes pre- anoxic pond (2), anaerobic pond (3), the first anoxic pond (4), the first aerobic tank
(5), deoxidation pond (6), the second anoxic pond (7), the second aerobic tank (8), interior reflux well (9), external carbon source dosing system (11), mixed
Close return-flow system (9.1) etc. in liquid.Pre- anoxic pond (2) connect with anaerobic pond (3), and anaerobic pond (3) and the first anoxic pond (4) are even
Connect, the first anoxic pond (4) is connect with the first aerobic tank (5), and the first aerobic tank (5) is connect with deoxidation pond (6), deoxidation pond (6) with
Second anoxic pond (7) connection, the second anoxic pond (7) are connect with the second aerobic tank (8).External carbon source dosing system (11.1) is preferential
It adds to the second anoxic pond (7), secondly external carbon source dosing system (11.2) is added to the first anoxic pond (4), and external carbon source is thrown
Dosage should keep that sewage carbon-nitrogen ratio (C/N) is made to be 3~3.5.
Return-flow system is interior reflux well (9), interior reflux line or interior reflux canal and interior reflux pump in the mixed liquor
(9.1), interior backwash deployment is adjusted according to influent quality difference, can enter interior reflux well (9) simultaneously from deoxidation pond end (6.1)
The first anoxic pond (4) are back to by interior reflux line or channel (9.1)；Or enter interior return from the second aerobic tank end (8.1)
Stream well (9) is simultaneously back to the first anoxic pond (4) by interior reflux line or channel (9.1).This system can be from pre- anoxic pond front end
(1.1), anaerobic pond front end (1.2), the first anoxic pond front end (1.3), the second anoxic pond front end (1.4) intake simultaneously.
Individual submersible agitator or impeller are set in the pre- anoxic pond, anaerobic pond, the first anoxic pond, first
The individual aerating system of setting in aerobic tank, the second aerobic tank, in degassing pond and the second anoxic pond setting stirring and the double systems of aeration
System, by configuring realization multi-mode operation above.The residence time of the pre- anoxic pond is 0.5h, and the anaerobic pond residence time is
1.0~1.5h, the deoxidation pond are arranged after the first aerobic tank, and the residence time in deoxidation pond is 0.5h；Second anoxic pond is set
It sets after deoxidation pond.
First anoxic pond is circular groove formula, and the first aerobic tank is pulling flow type, and pre- anoxic pond, anaerobic pond, disappear oxygen pond, second
Anoxic pond is thoroughly mixed formula, and the second aerobic tank is pulling flow type.
It is the pre- anoxic pond, anaerobic pond, the first anoxic pond, the first aerobic tank, deoxidation pond, the second anoxic pond, second aerobic
Pond can be separately provided, and can also build jointly.
Embodiment one: based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification and dephosphorization method, including it is following
Step:
H, by pretreated sewage, before a certain period enters biochemistry pool, influent quality is as follows: CODcr:350mg/L,
BOD5:150mg/L、TN:65mg/L、NH3-N:50mg/L,TP:6mg/L.Sewage enters pre- anoxic pond, stops under agitation
0.5h stops 1.5h subsequently into anaerobic pond under agitation, and anaerobic pond water outlet is mixed with the interior reflux in deoxidation pond 200%
Liquid enters the first anoxic pond together, stops 6h under the conditions of anoxia stirring, the under microorganism (MLSS 3.5g/L) effect
One anoxic pond carries out anti-nitration reaction and denitrogenation；The wherein ratio of 200% finger interior backflow mixed liquor flow and flow of inlet water.
I, each point amount of inlet water ratio is as follows: pre- anoxic pond 10%, anaerobic pond 20%, the first anoxic pond 50%, second lack
Oxygen pond 20%.
J, the resulting first anoxic pond mixed liquor of step a enters the first aerobic tank, 8h is stopped under aerobic condition, in micro- life
Object (MLSS 3.5g/L) effect is lower to carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction；The water outlet of first aerobic tank
TN concentration is 25mg/L.
K, the resulting first aerobic tank mixed liquor of step c enters deoxidation pond, 0.5h is stopped under the conditions of anoxia stirring, micro-
Biological (MLSS 3.5g/L) effect is lower to carry out oxygen consumption effect and deoxidation, and after the completion of deoxidation, 200% mixed liquor is back to first
Anoxic pond front end, while dissolved oxygen (DO) concentration in deoxidation pond is controlled in 0.5mg/L.
L, the remainder of the resulting deoxidation pond mixed liquor of step d enters the second anoxic pond, in the item of anoxia stirring operation
1.5h is stopped under part, acts on lower further progress anti-nitration reaction and denitrogenation at microorganism (MLSS 3.5g/L), it is scarce second
Oxygen pond adds the external carbon source for being equivalent to 15mg/LCOD equivalent.
M, the resulting second anoxic pond water outlet of step e enters the second aerobic tank, stops under the aerobic condition of the second aerobic tank
1h is stayed, further progress organic matter and external remaining carbon source oxidation, biological nitration under microorganism (MLSS 3.5g/L) effect
Reaction, while dissolved oxygen (DO) concentration of the second aerobic tank is controlled in 2mg/L.
N, the water outlet of the second aerobic tank enters secondary settling tank progress mud-water separation, lower layer's sludge reflux after separation to pre- anoxic
Pond, upper layer clear water are emitted into water body or advanced treating facility.Effluent quality index is as follows: CODcr:40mg/L, BOD5:6mg/L、
TN:15mg/L、NH3-N:2mg/L、TP:2mg/L。
Embodiment two: based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification and dephosphorization method, including it is following
Step:
F, by pretreated sewage, before a certain period enters biochemistry pool, influent quality is as follows: COD:500mg/L,
BOD5:250mg/L、TN:45mg/L、NH3-N:35mg/L,TP:6mg/L.Sewage enters pre- anoxic pond, stops under agitation
0.5h stops 1.5h subsequently into anaerobic pond under agitation.
G, each point amount of inlet water ratio is as follows: pre- anoxic pond 10%, anaerobic pond 20%, the first anoxic pond 70%.
H, backflow mixed liquor and anaerobic pond are discharged and enter the first anoxic pond together in the 200% of the second aerobic tank reflux,
6h is stopped under the conditions of anoxia stirring, microorganism (MLSS 3.5g/L) effect under the first anoxic pond carry out anti-nitration reaction and
Denitrogenation；The wherein ratio of 200% finger interior backflow mixed liquor flow and flow of inlet water.
I, the first aerobic tank, deoxidation pond, the second anoxic pond, the second aerobic tank open aerating system.Under aerobic condition,
The resulting first anoxic pond mixed liquor of step c enters the first aerobic tank, deoxidation pond, the second anoxic pond, the second aerobic tank, total to stop
Time 11h carries out oxidation operation, biological nitration and aerobic suction phosphorus reaction under microorganism (MLSS 3.5g/L) effect；
200% mixed liquor is back to the first anoxic pond front end in the second aerobic tank end；Meanwhile first aerobic tank, deoxidation pond, second
Anoxic pond, the control of dissolved oxygen (DO) concentration of the second aerobic tank are in 2mg/L.
J, the water outlet of the second aerobic tank enters secondary settling tank progress mud-water separation, lower layer's sludge reflux after separation to pre- anoxic
Pond, upper layer clear water are emitted into water body or advanced treating facility.Effluent quality index is as follows: COD cr:40mg/L, BOD5:6mg/
L、TN:15mg/L、NH3-N:2mg/L、TP:2mg/L。
Claims (7)
1. it is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system, it is characterized in that: including pre-
Anoxic pond (2), anaerobic pond (3), the first anoxic pond (4), the first aerobic tank (5), deoxidation pond (6), the second anoxic pond (7), second
Return-flow system (9.1) in aerobic tank (8), external carbon source dosing system (11), multipoint water feeding system (1) and mixed liquor；Pre- anoxic
Pond (2) is connect with anaerobic pond (3), and anaerobic pond (3) is connect with the first anoxic pond (4), the first anoxic pond (4) and the first aerobic tank
(5) it connects, the first aerobic tank (5) is connect with deoxidation pond (6), and deoxidation pond (6) are connect with the second anoxic pond (7), the second anoxic pond
(7) it is connect with the second aerobic tank (8).External carbon source dosing system (11.1) is added to the second anoxic pond (7) and the first anoxic pond
(4)；
In the mixed liquor return-flow system be interior reflux well (9), interior reflux line and interior reflux pump, return flow path it is as follows: from take off
Oxygen pond end (6.1) enters interior reflux well (9) and is back to the first anoxic pond (4) by interior reflux line or channel (9.1)；Or
Enter interior reflux well (9) from the second aerobic tank end (8.1) and the first anoxic is back to by interior reflux line or channel (9.1)
Pond (4).
2. it is as described in claim 1 it is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrogenation dephosphorizing system
System, it is characterized in that: this system can from pre- anoxic pond (2), anaerobic pond (3), the first anoxic pond (4), the second anoxic pond (7) simultaneously into
Water.
3. it is as described in claim 1 it is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrogenation dephosphorizing system
System, it is characterized in that: individual submersible agitator or impeller is arranged in the pre- anoxic pond, anaerobic pond, the first anoxic pond；?
The individual aerating system of setting in first aerobic tank, the second aerobic tank；In degassing pond and the second anoxic pond setting stirring and aeration
Dual system.
4. it is as described in claim 1 it is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrogenation dephosphorizing system
System, it is characterized in that: first anoxic pond be circular groove formula, the first aerobic tank be pulling flow type, pre- anoxic pond, anaerobic pond, deoxidation pond,
Second anoxic pond is the formula that is thoroughly mixed, and the second aerobic tank is pulling flow type.
5. it is as described in claim 1 it is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrogenation dephosphorizing system
System, it is characterized in that: the pre- anoxic pond, anaerobic pond, the first anoxic pond, the first aerobic tank, deoxidation pond, the second anoxic pond, second
Aerobic tank is separately provided or builds jointly.
6. a kind of as described in claim 1-5 any one of application strengthens anti-nitre based on multipoint water feeding and multi-mode operation
Change the method for denitrification dephosphorization system, it is characterised in that:
A, sewage enters pre- anoxic pond, stops 0.5h under agitation, subsequently into anaerobic pond, stops under agitation
1.5h, anaerobic pond water outlet enters the first anoxic pond together with the interior backflow mixed liquor in deoxidation pond 200%, under the conditions of anoxia stirring
6h is stopped, carries out anti-nitration reaction and denitrogenation in the first anoxic pond in the case where microorganism concn MLSS is 3.5g/L effect；Wherein
200% refers to the ratio of interior backflow mixed liquor flow and flow of inlet water.
B, each point amount of inlet water ratio is as follows: pre- anoxic pond 10%, anaerobic pond 20%, the first anoxic pond 50%, the second anoxic pond
20%.
C, the resulting first anoxic pond mixed liquor of step a enters the first aerobic tank, 8h is stopped under aerobic condition, in microorganism
MLSS, which is that 3.5g/L effect is lower, carries out oxidation operation, biological nitration and aerobic suction phosphorus reaction；
D, the resulting first aerobic tank mixed liquor of step c enters deoxidation pond, 0.5h is stopped under the conditions of anoxia stirring, in microorganism
MLSS deoxidation for the lower progress oxygen consumption effect of 3.5g/L effect, after the completion of deoxidation, 200% mixed liquor is back to the first anoxic pond
Front end, while the Dissolved Oxygen concentration Control in deoxidation pond is in 0.5mg/L.
E, the remainder of the resulting deoxidation pond mixed liquor of step d enters the second anoxic pond, under conditions of anoxia stirring operation
1.5h is stopped, further progress anti-nitration reaction and denitrogenation in the case where microorganism MLSS is 3.5g/L effect are thrown in the second anoxic pond
Add the external carbon source for being equivalent to 15mg/LCOD equivalent.
F, the resulting second anoxic pond water outlet of step e enters the second aerobic tank, stops 1h under the aerobic condition of the second aerobic tank,
Further progress organic matter and external remaining carbon source oxidation, biological nitration reaction in the case where microorganism MLSS is 3.5g/L effect, together
When the second aerobic tank Dissolved Oxygen concentration Control in 2mg/L.
G, the water outlet of the second aerobic tank enters secondary settling tank progress mud-water separation, lower layer's sludge reflux after separation to pre- anoxic pond, on
Layer clear water is emitted into water body or advanced treating facility.
7. a kind of as described in claim 1-5 any one of application strengthens anti-nitre based on multipoint water feeding and multi-mode operation
Change the method for denitrification dephosphorization system, it is characterised in that:
A, sewage enters pre- anoxic pond, stops 0.5h under agitation, subsequently into anaerobic pond, stops under agitation
1.5h。
B, each point amount of inlet water ratio is as follows: pre- anoxic pond 10%, anaerobic pond 20%, the first anoxic pond 70%.
C, backflow mixed liquor is discharged with anaerobic pond together into the first anoxic pond, in anoxic in the 200% of the second aerobic tank reflux
6h is stopped under stirring condition, carries out anti-nitration reaction and denitrogenation in the first anoxic pond in the case where microorganism MLSS is 3.5g/L effect；
The wherein ratio of 200% finger interior backflow mixed liquor flow and flow of inlet water.
D, the first aerobic tank, deoxidation pond, the second anoxic pond, the second aerobic tank open aerating system.Under aerobic condition, step
The resulting first anoxic pond mixed liquor of c enters the first aerobic tank, deoxidation pond, the second anoxic pond, the second aerobic tank, total residence time
11h carries out oxidation operation, biological nitration and aerobic suction phosphorus reaction in the case where microorganism MLSS is 3.5g/L effect；200% it is mixed
It closes liquid and is back to the first anoxic pond front end in the second aerobic tank end；Meanwhile first aerobic tank, deoxidation pond, the second anoxic pond,
The Dissolved Oxygen concentration Control of two aerobic tanks is in 2mg/L.
E, the water outlet of the second aerobic tank enters secondary settling tank progress mud-water separation, lower layer's sludge reflux after separation to pre- anoxic pond, on
Layer clear water is emitted into water body or advanced treating facility.
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