CN110002591A - The apparatus and method of city domestic sewage short distance nitration coupling denitrification dephosphorization are realized under a kind of anoxic/aerobic alternation condition - Google Patents
The apparatus and method of city domestic sewage short distance nitration coupling denitrification dephosphorization are realized under a kind of anoxic/aerobic alternation condition Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C02F3/308—Biological phosphorus removal
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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Abstract
The apparatus and method that the coupling denitrification dephosphorization of city domestic sewage short distance nitration is realized under a kind of anoxic/aerobic alternation condition, belong to the field of biological sewage processing.The technique is realized in the sbr reactor device of a short distance nitration coupling denitrification dephosphorization.City domestic sewage is pumped by sbr reactor device by peristaltic pump first, make dephosphorization bacterial (PAOs and DPAOs), fusca xylanase (GAOs) and denitrification fusca xylanase (DGAOs) absorb the organic carbon source in sewage and synthesize internal carbon source PHA by anaerobism stirring to be stored in vivo, while dephosphorization bacterial carries out anaerobic phosphorus release.Subsequently into hypoxemia anoxic/aerobic alternating phases, short distance nitration, the endogenous denitrification of nitrite nitrogen approach, aerobic phosphorus absorption and denitrification dephosphorization occur for aerobic section.Endogenous denitrification and denitrification dephosphorization occur for anoxic section.Constant hypoxia is aerated after anoxic/aerobic alternating, stops being aerated by DO and pH real-time control.Low dissolved oxygen and anoxic/aerobic alternate with the stabilization for being conducive to maintain short distance nitration.
Description
Technical field
The present invention relates to realize that city domestic sewage short distance nitration coupling denitrification removes under a kind of anoxic/aerobic alternation condition
The apparatus and method of phosphorus, belong to technical field of biological sewage treatment.
Background technique
Nutrient in water body can be more than the self-purification capacity and ability to bear of water body itself when for example the content of nitrogen and phosphorous is excessive,
So as to cause the eutrophication of water body, algae and planktonic organism excess growth, the process of these algae and planktonic organism in growth
In can excrete poison, while can consume during breathing a large amount of DO keeps organism in water dead due to excessive anaerobism.Water
Body water quality obtains more muddy stench, and ecosystem stability decline limits industrial agricultural to the huge using influencing of water resource
The development of animal husbandry even threatens to the health of the mankind.Currently, all there is nitrogen phosphorus in most of sewage treatment plants, China
It cannot problem up to standard simultaneously.Traditional biological denitrification dephosphorization technique in actual application, often will appear denitrification effect and
Phosphor-removing effect cannot reach best phenomenon simultaneously, and there is aeration and carbon source and consume big, complex process, denitrogenation dephosphorizing efficiency
Low, the problems such as operating cost is high.
The basic principle of short-cut nitrification and denitrification denitrogenation is by the conditions such as control temperature, dissolved oxygen, pH, sludge age, suppression
Nitrite oxidizing bacteria growth processed, makes nitration reaction stopping when generating nitrite, is no longer further oxidized to nitric acid
Salt but carry out denitrification directly as electron acceptor to the nitrogen in waste water of going out.Short-cut nitrification and denitrification can be cut down aerobic
Amount (about 25%) and organic carbon source (about 40%), to reduce operation energy consumption and operating cost.
Enhanced biological phosphorus removal (EBPR) technology can detested in sewage disposal system by the PAOs and DPAOs of enrichment
Under the conditions of oxygen, absorbs the organic carbon source in sewage and synthesize the release that internal carbon source PHA is stored in vivo while carrying out phosphorus, then exist
The absorption of phosphorus is carried out under aerobic condition using oxygen as electron acceptor, and is realized eventually by the mode for discharging rich phosphorus excess sludge and is
The removal of phosphorus in system.Simultaneously under conditions of anoxic, DPAOs can be carried out using nitrite nitrogen or nitrate nitrogen as electron acceptor
Denitrification dephosphorization.Denitrification dephosphorization realizes " carbon is dual-purpose ", the saving of the effective synchronous removal and carbon source for realizing nitrogen phosphorus.This
Outside, in EBPR system, there can be the enrichment of GAOs while PAOs enrichment.GAOs has metabolism machine similar with polyP bacteria
Reason can be absorbed the organic carbon source in sewage under anaerobic and is stored in the form of internal carbon source PHA in vivo, and be worked as
Under anoxia condition, GAOs can decompose intracorporal PHA production capacity as electron acceptor using nitrite nitrogen or nitrate nitrogen and carry out denitrification
Denitrogenation.
The present invention proposes to realize the coupling denitrification dephosphorization of city domestic sewage short distance nitration under anoxic/aerobic alternation condition
New process.Short distance nitration coupling denitrification dephosphorization process can make short distance nitration process, denitrification process, dephosphorization process and remove carbon
Process all occur simultaneously in the same reactor so that the amount of required oxygen substantially reduces, to save energy consumption.
PAOs, DPAOs, GAOs and DGAOs can save carbon source, effectively in the interior carbon that anaerobism section consumes COD and stores so as to more
The sewage of the good low C/N ratio of processing.
Summary of the invention
The technical problem to be solved by the present invention is to city domestic sewage short distance is realized under a kind of anoxic/aerobic alternation condition
The apparatus and method for nitrifying coupling denitrification dephosphorization, solve current sewage treatment carbon source deficiency, and water outlet does not reach level-one A and its processing
The problems such as costly, realizes stable denitrogenation dephosphorizing.City domestic sewage is pumped by sbr reactor device by peristaltic pump first, is led to
Crossing anaerobism stirring absorbs dephosphorization bacterial (PAOs and DPAOs), fusca xylanase (GAOs) and denitrification fusca xylanase (DGAOs) in sewage
Organic carbon source simultaneously synthesizes internal carbon source PHA and is stored in vivo, while dephosphorization bacterial carries out anaerobic phosphorus release.Subsequently into hypoxemia anoxic/good
Oxygen alternating phases, the process is using periodically aeration, and short distance nitration, nitrite nitrogen approach occur for four periods, aerobic section altogether
Endogenous denitrification, aerobic phosphorus absorption and denitrification dephosphorization.Endogenous denitrification and denitrification dephosphorization occur for anoxic section.Anoxic/good
Constant hypoxia is aerated after oxygen alternating, is passed through DO and pH real-time control and is stopped being aerated.Low dissolved oxygen and anoxic/aerobic alternate with
Conducive to the stabilization for maintaining short distance nitration.PAOs, DPAOs, GAOs and DGAOs can in the interior carbon that anaerobism section consumes COD and stores
Effective saving carbon source achievees the effect that enhanced biological phosphorus removal so as to preferably handle the sewage of low C/N ratio, compared to tradition
The technique of denitrogenation dephosphorizing, the technique have the advantages of saving aeration quantity, being not necessarily to additional carbon.
The purpose of the present invention is by the following technical programs to solve:
Based on anoxic/aerobic device for alternately realizing synchronous short-cut nitrification and denitrification dephosphorization, it is characterised in that: its dress used
It sets including municipal sewage raw water box (1), anoxic/aerobic alternately short distance nitre of water inlet peristaltic pump (2.1) and inlet valve (2.2) connection
Change coupling denitrification dephosphorization SBR (2.3), anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) setting stirring
Device (2.4) connects agitating paddle (2.5), aeration head (2.6), gas flowmeter (2.7), intake valve (2.8), air pump (2.9), DO biography
Sensor (2.10), pH sensor (2.11), DO/pH analyzer (2.12), spilling water valve (2.13), the first drain valve (2.14),
Two drain valves (2.15), mud valve (2.16).Anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) pass through row
Mud peristaltic pump (2.17) is connect with spoil disposal case (3)；It is connect by draining peristaltic pump (2.18) with discharge casing (4).
Technique the following steps are included:
1) the reactor start-up stage: anoxic/aerobic alternating short distance nitration coupling denitrification dephosphorization SBR (2.3)
Middle inoculation handles the short distance nitration sludge in sanitary sewage reactor and contains PAOs, DPAOs, GAOs and DGAO
Sludge, volume ratio 2:1, sludge concentration are controlled in 2500-3000mg/L.Start anoxic/aerobic alternating at room temperature
Short distance nitration coupling denitrification dephosphorization SBR (2.3).
2) operational process operation is adjusted as follows: the sanitary sewage in municipal sewage raw water box (1) is passed through water inlet peristaltic pump
(2.1) it is pumped into anoxic/aerobic alternating short distance nitration coupling denitrification dephosphorization SBR (2.3).After water inlet end, anoxic/aerobic alternating
Short distance nitration coupling denitrification dephosphorization SBR (2.3) starts anaerobism and stirs 2.5h, makes PAOs, DPAOs, GAOs by anaerobism stirring
It absorbs the organic carbon source in sewage with DGAOs and synthesizes internal carbon source PHA and be stored in vivo, while PAOs and DPAOs carries out anaerobism
Release phosphorus.Into anoxic/aerobic alternating phases, anoxic/aerobic alternation procedure uses periodic a cycle low-oxygen aeration 2h,
Then anoxia stirring 20min, behind three periods equal low-oxygen aeration 1h anoxia stirring 20min, four periods altogether.
In aerobic stage, PAOs progress while making to be oxidized to nitrite nitrogen into the ammonia nitrogen short distance nitration in water by aeration
Aerobic phosphorus absorption.Low-oxygen aeration creates micro-environmental hypoxia, and DPAOs is using nitrite nitrogen as electron acceptor, with the PHA of anaerobism section storage
Denitrification dephosphorization is carried out for electron donor.Similarly for DGAOs using nitrite nitrogen as electron acceptor, the PHA with the storage of anaerobism section is electricity
Sub- donor carries out endogenous denitrification.In anoxic phases with the further endogenous denitrification of same principle and denitrification dephosphorization, realize
The effect of advanced nitrogen dephosphorization.In anoxic/aerobic alternate anoxic phases, the activity of AOB and NOB are suppressed, but good
The regeneration rate of the regeneration rate ratio NOB of oxygen section AOB is fast, while the nitrite generated by aerobic section is in anoxic section denitrification
For nitrogen, reduce the substrate of NOB, therefore anoxic/aerobic alternate with maintains conducive to stablizing for short distance nitration.
Constant hypoxia is aerated 30min -50min after anoxic/aerobic alternating, passes through prominent more point (the dDO/dt > of observation DO
1) and when pH ammonia valley point (dpH/dt >=0) real-time control stops aeration, and aeration quantity passes through gas flowmeter in aeration process
(2.7) adjusting makes anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) interior DO control in 0.2-0.3mg/L.
Enter bleeding stage after finally precipitating 20min, water be discharged by discharge casing (4) by the second drain valve (2.15) after aeration stopping,
Draining is than being 60%-70%.
Anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) need spoil disposal in the process of running, open
Sludge pump (2.17) and sludge-drainage time is controlled, guarantees anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3)
Interior activated sludge age is maintained at 12-15 days.
Realized under a kind of anoxic/aerobic alternation condition the device of city domestic sewage short distance nitration coupling denitrification dephosphorization with
Method has the advantage that
1) by anoxic/aerobic alternating, be conducive to the stabilization of short distance nitration, anoxic section enhances denitrification and denitrification removes
Phosphorus further improves the removal rate of nitrogen and phosphorus.
2) hypoxemia anoxic/aerobic alternating, can the effectively save energy, anaerobism section store internal carbon source carry out denitrification dephosphorization,
Achieve the effect that " carbon is dual-purpose ", is not necessarily to additional carbon, save the cost.
3) present invention completes denitrogenation dephosphorizing in a sbr reactor device, and simple process is easily-controllable, easy to operate.
Detailed description of the invention
Fig. 1 be realized under a kind of anoxic/aerobic alternation condition of the present invention device of synchronous short-cut nitrification and denitrification dephosphorization with
The structural schematic diagram of method.
In Fig. 1: 1 being municipal sewage raw water box, 2.1 be water inlet peristaltic pump, 2.2 be inlet valve, 2.3 be anoxic/aerobic friendship
It is blender for short distance nitration coupling denitrification dephosphorization SBR, 2.4,2.5 be agitating paddle, 2.6 be aeration head, 2.7 is gas flow
Meter, 2.8 be intake valve, 2.9 be air pump, 2.10 be DO sensor, 2.11 be pH sensor, 2.12 be DO/pH analyzer, 2.13
It is the first drain valve for spilling water valve, 2.14,2.15 be the second drain valve, 2.16 be mud valve, 2.17 is spoil disposal peristaltic pump, 2.18
For draining peristaltic pump, 3 be spoil disposal case, 4 be discharge casing.
Fig. 2 is the operation that the coupling denitrification dephosphorization of city domestic sewage short distance nitration is realized under anoxic/aerobic alternation condition
Timing diagram.
Specific embodiment
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.
Realize that city domestic sewage short distance nitration coupling denitrification removes under a kind of anoxic/aerobic alternation condition as shown in Figure 1
The apparatus and method of phosphorus, it is characterised in that: its equipment therefor includes municipal sewage raw water box (1), intake peristaltic pump (2.1) and into
The anoxic of water valve (2.2) connection/aerobic alternating short distance nitration coupling denitrification dephosphorization SBR (2.3), anoxic/aerobic alternately short distance
It nitrifies coupling denitrification dephosphorization SBR (2.3) setting blender (2.4) and connects agitating paddle (2.5), aeration head (2.6), gas flow
Count (2.7), intake valve (2.8), air pump (2.9), DO sensor (2.10), pH sensor (2.11), DO/pH analyzer
(2.12), spilling water valve (2.13), the first drain valve (2.14), the second drain valve (2.15), mud valve (2.16).Anoxic/aerobic
Alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) are connect by spoil disposal peristaltic pump (2.17) with spoil disposal case (3)；Pass through row
Water peristaltic pump (2.18) is connect with discharge casing (4).
With Beijing university dependents' district sanitary sewage, the denitrogenation dephosphorizing of system is investigated except carbon performance, the specific water quality of raw water is such as
Under: COD concentration is 120~260mg/L, NH4 +- N concentration is 50~75mg/L, NO2 -- N concentration < 0.1mg/L, NO3 -- N concentration <
0.8mg/L, P concentration are 5~7mg/L, and pH is 7~8.Pilot system is as shown in Figure 1, reactor is lacked using organic glass production
Oxygen/aerobic alternating short distance nitration coupling denitrification dephosphorization SBR (2.3), dischargeable capacity 10L
Carrying out practically operation is as follows:
1) the reactor start-up stage: anoxic/aerobic alternating short distance nitration coupling denitrification dephosphorization SBR (2.3)
Middle inoculation handles the short distance nitration sludge in sanitary sewage reactor and contains PAOs, DPAOs, GAOs and DGAO
Sludge, volume ratio 2:1, sludge concentration are controlled in 2500-3000mg/L.Start anoxic/aerobic alternating at room temperature
Short distance nitration coupling denitrification dephosphorization SBR (2.3).
2) operational process operation is adjusted as follows: the sanitary sewage in municipal sewage raw water box (1) is passed through water inlet peristaltic pump
(2.1) it is pumped into anoxic/aerobic alternating short distance nitration coupling denitrification dephosphorization SBR (2.3).After water inlet end, anoxic/aerobic alternating
Short distance nitration coupling denitrification dephosphorization SBR (2.3) starts anaerobism and stirs 2.5h, makes PAOs, DPAOs, GAOs by anaerobism stirring
It absorbs the organic carbon source in sewage with DGAOs and synthesizes internal carbon source PHA and be stored in vivo, while PAOs and DPAOs carries out anaerobism
Release phosphorus.Into anoxic/aerobic alternating phases, anoxic/aerobic alternation procedure uses periodic a cycle low-oxygen aeration 2h,
Then anoxia stirring 20min, behind three periods equal low-oxygen aeration 1h anoxia stirring 20min, four periods altogether.In addition last
Aeration how to control and stop reacting
In aerobic stage, PAOs progress while making to be oxidized to nitrite nitrogen into the ammonia nitrogen short distance nitration in water by aeration
Aerobic phosphorus absorption.Low-oxygen aeration creates micro-environmental hypoxia, and DPAOs is using nitrite nitrogen as electron acceptor, with the PHA of anaerobism section storage
Denitrification dephosphorization is carried out for electron donor.Similarly for DGAOs using nitrite nitrogen as electron acceptor, the PHA with the storage of anaerobism section is electricity
Sub- donor carries out endogenous denitrification.In anoxic phases with the further endogenous denitrification of same principle and denitrification dephosphorization, realize
The effect of advanced nitrogen dephosphorization.In anoxic/aerobic alternate anoxic phases, the activity of AOB and NOB are suppressed, but good
The regeneration rate of the regeneration rate ratio NOB of oxygen section AOB is fast, while the nitrite generated by aerobic section is in anoxic section denitrification
For nitrogen, reduce the substrate of NOB, therefore anoxic/aerobic alternate with maintains conducive to stablizing for short distance nitration.
Constant hypoxia is aerated 30min -50min after anoxic/aerobic alternating, passes through prominent more point (the dDO/dt > of observation DO
1) and when pH ammonia valley point (dpH/dt >=0) real-time control stops aeration, and aeration quantity passes through gas flowmeter in aeration process
(2.7) adjusting makes anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) interior DO control in 0.2-0.3mg/L.
Enter bleeding stage after finally precipitating 20min, water be discharged by discharge casing (4) by the second drain valve (2.15) after aeration stopping,
Draining is than being 60%-70%.
Anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) need spoil disposal in the process of running, open
Sludge pump (2.17) and sludge-drainage time is controlled, guarantees anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3)
Interior activated sludge age is maintained at 12-15 days.
Continuous experiment the result shows that: under the service condition, final outflow water is averaged COD, NH4+-N、NO2--N、NO3--N、
TN, TP are respectively 34.51mg/L, 3.44mg/L, 5.06mg/L, 0.52mg/L, 9.02mg/L, 0.358mg/L.It is discharged each water quality
Index reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) level-one A standard.
Claims (2)
1. based on anoxic/aerobic device for alternately realizing synchronous short-cut nitrification and denitrification dephosphorization, it is characterised in that: its equipment therefor
Including municipal sewage raw water box (1), anoxic/aerobic alternately short distance nitration of water inlet peristaltic pump (2.1) and inlet valve (2.2) connection
Blender is arranged in coupling denitrification dephosphorization SBR (2.3), anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3)
It connects agitating paddle (2.5), while connecting aeration head (2.6), gas flowmeter (2.7), intake valve (2.8), air pump (2.9), DO
Sensor (2.10), pH sensor (2.11), DO/pH analyzer (2.12), spilling water valve (2.13), the first drain valve (2.14),
Second drain valve (2.15), mud valve (2.16)；Anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) pass through
Spoil disposal peristaltic pump (2.17) is connect with spoil disposal case (3)；It is connect by draining peristaltic pump (2.18) with discharge casing (4).
2. the method for application device as described in claim 1, which comprises the following steps:
1) the reactor start-up stage: inoculation processing life in anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3)
Short distance nitration sludge in sewage reactor living and the sludge containing PAOs, DPAOs, GAOs and DGAO, volume ratio 2:1 are dirty
Mud concentration is controlled in 2500-3000mg/L；Start anoxic/aerobic alternately short distance nitration coupling denitrification at room temperature to remove
Phosphorus SBR (2.3)；
2) operational process operation is adjusted as follows: the sanitary sewage in municipal sewage raw water box (1) is passed through water inlet peristaltic pump (2.1)
It is pumped into anoxic/aerobic alternating short distance nitration coupling denitrification dephosphorization SBR (2.3)；After water inlet end, anoxic/aerobic alternately short distance
Nitrify coupling denitrification dephosphorization SBR (2.3) start anaerobism stir 2.5h, by anaerobism stirring make PAOs, DPAOs, GAOs and
DGAOs, which absorbs the organic carbon source in sewage and synthesizes internal carbon source PHA, to be stored in vivo, while PAOs and DPAOs carries out anaerobism and releases
Phosphorus；Into anoxic/aerobic alternating phases, anoxic/aerobic alternation procedure uses periodic a cycle low-oxygen aeration 2h, so
Anoxia stirring 20min afterwards, behind three periods equal low-oxygen aeration 1h anoxia stirring 20min, four periods altogether；
Constant hypoxia is aerated 30min -50min after anoxic/aerobic alternating, real as dDO/dt > 1 and dpH/dt >=0
Time control stop is only aerated time control stop and is only aerated, and aeration quantity is adjusted by gas flowmeter (2.7) in aeration process makes anoxic/good
Oxygen replaces short distance nitration coupling denitrification dephosphorization SBR (2.3) interior DO control in 0.2-0.3mg/L；Enter row after finally precipitating 20min
Water is discharged into discharge casing (4) after stopping by the second drain valve (2.15) by water stage, aeration, and draining is than being 60%-70%；
Anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3) need spoil disposal in the process of running, open spoil disposal
It pumps (2.17) and controls sludge-drainage time, guarantee in anoxic/aerobic alternately short distance nitration coupling denitrification dephosphorization SBR (2.3)
Activated sludge age is maintained at 12-15 days.
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Cited By (5)
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|---|---|---|---|---|
| CN112624339A (en) * | 2020-12-30 | 2021-04-09 | 山东大学 | Device and method for synchronously and deeply removing carbon, nitrogen and phosphorus in nitrite-containing sewage |
| CN112960772A (en) * | 2021-01-17 | 2021-06-15 | 北控水务(中国)投资有限公司 | Biological denitrification device and method for coupling staged water inlet with synchronous shortcut nitrification and denitrification |
| CN113213630A (en) * | 2021-05-21 | 2021-08-06 | 光大水务科技发展（南京）有限公司 | Sequential control method for applying short-cut nitrification and denitrification process of wastewater to biochemical pool |
| CN113943056A (en) * | 2021-10-13 | 2022-01-18 | 北京工业大学 | Method for realizing synchronous nitrogen and phosphorus removal of continuous flow equilibrium glycan bacteria and phosphorus accumulating bacteria |
| CN115321747A (en) * | 2022-07-14 | 2022-11-11 | 暨南大学 | Sewage treatment device and process compatible with multiple denitrification paths |
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| CN113943056B (en) * | 2021-10-13 | 2023-09-01 | 北京工业大学 | Method for realizing synchronous nitrogen and phosphorus removal by continuous flow balance polysaccharide bacteria and phosphorus accumulating bacteria |
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| CN115321747B (en) * | 2022-07-14 | 2023-11-14 | 暨南大学 | Sewage treatment device and process compatible with multiple denitrification paths |
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