CN103226366A - Control method for partial nitrification-anaerobic ammonia oxidation integrated denitrification process - Google Patents
Control method for partial nitrification-anaerobic ammonia oxidation integrated denitrification process Download PDFInfo
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Abstract
The invention discloses a control method for a partial nitrification-anaerobic ammonia oxidation integrated SBR (Sequencing Batch Reactor) denitrification process. The method consists of a dissolved oxygen-ammonia nitrogen control method and a pH-ammonia nitrogen control method respectively, wherein the dissolved oxygen-ammonia nitrogen control method comprises the steps that a dissolved oxygen on-line electrode and an ammonia nitrogen on-line electrode are utilized, the aeration rate is controlled through the dissolved oxygen on-line electrode, furthermore the concentration level of NO2-N in an SBR is controlled so as to synchronously carry out the partial nitrification and the anaerobic ammonia oxidation reaction in one same SBR, and the ammonia nitrogen residual concentration in the SBR is controlled through the ammonia nitrogen on-line electrode; and the pH-ammonia nitrogen control method comprises the steps that a pH on-line electrode and the ammonia nitrogen on-line electrode are utilized, an aeration system is controlled to stop through the decreasing amplitude delta pH1 of the pH at the nitration period, the aeration system is controlled to start through the increasing amplitude delta pH2 of the pH in the anaerobic ammonia oxidation period, the partial nitrification and the anaerobic ammonia oxidation reaction are carried out in one same SBR alternatively, and the ammonia nitrogen residual concentration in the SBR is controlled through the ammonia nitrogen on-line electrode.
Description
Technical field
The invention belongs to new bio denitrogenation field, relate to dissolved oxygen DO-ammonia nitrogen and two kinds of control methods of pH-ammonia nitrogen in short distance nitration-anaerobic ammoxidation integral type SBR (sequencing batch reactor) denitrification process particularly.
Background technology
Raising along with social development and resident living level, the subject matter that current China water environment faces has been polluted by traditional oxygen consumption and has been changed to the eutrophication direction, and because ammonia nitrogen is that to consume water body oxygen be the material that causes body eutrophication, so ammonia nitrogen is being played the part of important role in China's water pollution origin cause of formation transition process.Based on this, in China " 12 " planning outline, clearly increase the restrictive water pollutant of ammonia nitrogen newly and reduced discharging index, be the important difficult problem that China environmental protection faces so how to cut down the ammonia nitrogen discharging.
Current sewage water denitrification is still based on the biological nitration/denitrification of routine, though compare physics, the chemical method denitrogenation has cost advantage, but still exist efficient low, energy consumption material consumption height, shortcomings such as surplus sludge volume is big [Fux, C.and H.Siegrist.2004.Nitrogen removal from sludge digester liquids by nitrification/denitrification or partial nitritation/anammox:environmental and economical considerations[J] .Water Science and Technology, 50 (10): 19-26].Along with to the going deep into of nitrogen path for transformation understanding, the inherent defect that exists at traditional denitrification process and develop and a series of novel denitrification process.Anammox technology (Anaerobic Ammonium Oxidation, Anammox) result from [the Mulder nineties in last century, A., A.A.Vandegraaf, L. A.Robertson, et al.1995.Anaerobic ammonium oxidation discovered in a denitrifying fluidized bed reactor[J] .Fems Microbiology Ecology, 16 (3): 177-183], be the most promising at present new bio denitride technology, its reaction can be expressed as:
Because the Anammox reaction is with NH
4 +-N and NO
2 --N is as substrate, and NO in the general waste water
2 --N content is very low, so realize NO by short distance nitration
2 --N accumulation is the essential condition of Anammox.Contrast traditional denitrogenation method, the short distance nitration-anaerobic ammoxidation group technology can be saved about 60% aeration rate, do not need additional carbon fully, sludge yield is low, be particularly suitable for handling low C/N ratio, high ammonia-nitrogen wastewater [Fux C, Boehler M, et al.Biological treatment of ammonium-rich wastewater by partial nitritation and subsequent anaerobic ammonium oxidation (anammox) in a pilot plant[J] .Journal of Biotechnology, 2002,99 (3): 295-306].
For the integral type combination of short distance nitration and Anammox, existing CANON, OLAND, technologies such as DEMON, SNAP.The major function bacterium is ammonia oxidation bacteria (AOB) and Anammox bacterium, is in the same reactive system, and the mutual relationship complexity mainly shows dissolved oxygen DO and nitrite two aspects.Certain dissolved oxygen DO is the necessary electron accepter of AOB oxidation ammonia nitrogen, but when its excessive concentration, will produce inhibiting effect to the Anammox bacterium, therefore can pass through little aeration, the DO concentration of control course of reaction is in reduced levels, comes to satisfy simultaneously the psychological need of two kinds of bacterium.NO
2 --N is the short distance nitration product of AOB, is again the reaction substrate of Anammox bacterium, but after its concentration surpasses certain value, also can produce inhibiting effect to the Anammox bacterium.Because at present direct NO
2 -That is that all right is ripe for-N concentration real time on-line monitoring means, so produce sour characteristic according to the short distance nitration of ammonia nitrogen, can change by control pH and come NO in the control system
2 --N growing amount.Therefore, for the actual motion of short distance nitration-anaerobic ammoxidation combined denitrification technology, mainly dissolved oxygen DO or the pH by control system controls at present.
Yet control DO and pH only belong to process control, and NO can not occur for strict guarantee short distance nitration-anaerobic ammoxidation integral type technology in actual motion
2 -Certain density NH need be still retained in-N accumulation when reaction finishes
4 +-N, this long-term stability operation for total system is most important.And present sewage treatment facility is all kept fixing hydraulic detention time (HRT) in actual moving process, like this when fluctuation takes place in the influent ammonia nitrogen load, ammonia nitrogen concentration also can be affected in the water outlet, can not guarantee certain residue ammonia nitrogen, so NO may occur
2 --N accumulation.Particularly when process object is the industrial waste water of high-concentration ammonia-nitrogen, can be violent because of the ammonia nitrogen loading fluctuation, bring serious impact load, make the normal operation of system face the danger of collapse.
The source of high-concentration ammonia nitrogenous wastewater is except that municipal sludge water (sludge digestion supernatant, digested sludge mechanical dehydration filtrate), mainly contain the factory effluent of industrial trades such as chemical fertilizer production, pharmacy, petrochemical industry, coking, its variation water quality is more violent, so also there is not the perfect control method to guarantee that short distance nitration-anaerobic ammoxidation group technology flexible Application is in above-mentioned industrial trade at present, therefore, be necessary to propose to adapt to the brand-new control model of water quality big ups and downs objective condition.
Summary of the invention
The object of the present invention is to provide the control method of short distance nitration-anaerobic ammoxidation integral type SBR denitrification process.
For achieving the above object, the control method of short distance nitration-anaerobic ammoxidation integral type SBR denitrification process provided by the invention is respectively dissolved oxygen DO-ammonia nitrogen control method and pH-ammonia nitrogen control method; Wherein:
Dissolved oxygen DO-ammonia nitrogen control method be utilize dissolved oxygen DO at line electrode and ammonia nitrogen at line electrode, control aeration rate by dissolved oxygen DO at line electrode, and then NO among the control SBR
2 --N concentration level is retained concentration by the ammonia nitrogen of ammonia nitrogen in line electrode control SBR;
PH-ammonia nitrogen control method be utilize pH at line electrode and ammonia nitrogen at line electrode, control stopping of aerating system by pH at the range of decrease Δ pH1 in nitrated stage, by the unlatching of pH at the amplification Δ pH2 in Anammox stage control aerating system, thereby realizing that the short distance nitration of ammonia nitrogen and Anammox are reflected in the same SBRSBR nitrogen rejection facility hockets.Retain concentration by the ammonia nitrogen of ammonia nitrogen in line electrode control SBR.
Described control method, wherein, whole short distance nitration-anaerobic ammoxidation integral type SBR denitrification process is divided into into water, reaction, stirring, precipitation, draining and idle six steps.
Described control method, wherein, dissolved oxygen concentration is at 1.00mgL among dissolved oxygen DO-ammonia nitrogen control method control SBR
-1Below, control aerobic stage NO
2 --N concentration is at 10.00mgL
-1Below, it is 10.00～30.00mgL that the control ammonia nitrogen is retained concentration
-1
Described control method, wherein, pH-ammonia nitrogen control method control aerobic stage NO
2 --N concentration is at 10.00mgL
-1Below, it is 10.00～30.00mgL that the control ammonia nitrogen is retained concentration
-1
Control method of the present invention compared with prior art, advantage is:
(1) adopt three kinds of DO, pH and ammonia nitrogens at line electrode, monitor the technological parameter among the SBR in real time, by PLC system control overall operation, the automaticity height, operation maintenance is easy.
(2) combine the control of process control and terminal point, tackle influent ammonia nitrogen load fluctuation situation flexibly, the impact load of anti-the ammonia nitrogen guarantees stable effluent quality.
(3) adopt NH
4 +The certain ammonia nitrogen of the strict control of-N electrode is retained concentration, can avoid NO
2 --N accumulation, thus the generation that the Anammox bacterium is suppressed phenomenon can effectively be controlled, help the stable of long-time running.
Description of drawings
Fig. 1 is under dissolved oxygen DO of the present invention-ammonia nitrogen control method and the pH-ammonia nitrogen control method, the schematic flow sheet of SBR operation.
Fig. 2 is the PLC logical schematic of dissolved oxygen DO of the present invention-ammonia nitrogen control method.
Fig. 3 is the PLC logical schematic of pH-ammonia nitrogen control method of the present invention.
Fig. 4 is under dissolved oxygen DO of the present invention-ammonia nitrogen control method, and pH, DO, EC and ammonia nitrogen are in the line electrode monitoring result in the single cycle of short distance nitration-anaerobic ammoxidation integral type SBR technology.
Fig. 5 is under dissolved oxygen DO of the present invention-ammonia nitrogen control method, NH in the single cycle of short distance nitration-anaerobic ammoxidation integral type SBR technology
4 +-N, NO
3 --N, NO
2 --N and TN situation of change.
Fig. 6 is under the pH-ammonia nitrogen control method of the present invention, the pH of short distance nitration-anaerobic ammoxidation integral type SBR technology fluctuation span of control limit of control value.
Fig. 7 is under the pH-ammonia nitrogen control method of the present invention, and pH, DO, EC and ammonia nitrogen are in the line electrode monitoring result in the single cycle of short distance nitration-anaerobic ammoxidation integral type SBR technology.
Fig. 8 is under the pH-ammonia nitrogen control method of the present invention, NH in the single cycle of short distance nitration-anaerobic ammoxidation integral type SBR technology
4 +-N, NO
3 --N, NO
2 --N and TN situation of change.
Fig. 9 is a short distance nitration-anaerobic ammoxidation integral type SBR nitrogen rejection facility synoptic diagram of the present invention.
Embodiment
Control method of the present invention goes for comprising a series of low C/N ratio of sludge digestion liquid, coking chemical waste water, nitrogen fertilizer production waste water, pharmacy waste water etc., the biological denitrificaion processing of high ammonia-nitrogen wastewater.
The present invention is directed to the existing control method defective of short distance nitration-anaerobic ammoxidation combined denitrification technology, propose dissolved oxygen DO-ammonia nitrogen and two kinds of control methods of pH-ammonia nitrogen.The enforcement of control method is specifically by DO, pH and NH
4 +The operation of three kinds of online electrode pair short distance nitration-anaerobic ammoxidation integral type SBR of-N is monitored in real time, obtain controlled variable and be transported to two kinds of PLC systems that jointly control mode logic of operation, respectively go on foot implementation status by what the logic determines that jointly controls pattern was controlled short distance nitration-anaerobic ammoxidation integral type SBR nitrogen rejection facility, specifically be the control in six stages of SBR (water inlet, reaction, stirring, precipitation, draining and idle).
One, the concrete enforcement of the control procedure of dissolved oxygen DO-ammonia nitrogen combination control method is divided into following steps:
(1) the SBR nitrogen rejection facility brings into operation, and paddle starts, and intake pump starts, the SBR nitrogen rejection facility begins water inlet, and liquid level sensor feeds back to the PLC control system by to the level detection in the SBR nitrogen rejection facility with level value, when liquid level arrives the high liquid level of setting, control stopping of intake pump.
(2) after intake pump stopped, aerating system started, and the DO concentration of dissolved oxygen DO in the line electrode monitoring system is regulated by flowmeter, and the DO concentration in the control SBR nitrogen rejection facility guarantees NO
2 -Accumulation can not appear in-N, and two processes of short distance nitration and Anammox take place simultaneously, and the ammonia nitrogen concentration that ammonia nitrogen is monitored in the SBR nitrogen rejection facility in real time at line electrode changes.
(3) along with short distance nitration and two reactions of Anammox continue carry out, the ammonia nitrogen in the SBR nitrogen rejection facility constantly is consumed, ammonia nitrogen electrode reading constantly reduces, when the ammonia nitrogen that reaches setting was retained concentration value, aerating system stopped.
(4) after aerating system quit work, DO concentration can be reduced to 0.00mgL rapidly in the SBR nitrogen rejection facility
-1, SBR enters agitation phases.Certain stirring duration is set, guarantees the NO that generates
2 -The Anammox reaction takes place and is removed the N of generation fully in-N
2From water, overflow, thereby improve sludge settling property in the SBR nitrogen rejection facility.
(5) after the stirring duration was finished, paddle quit work, and the SBR nitrogen rejection facility enters precipitate phase, and sludge settling is realized mud-water separation in the bottom of SBR nitrogen rejection facility.
(6) after the precipitation duration was finished, unwatering system started, and supernatant is discharged, and liquid level sensor feeds back to the PLC control system by to the level detection in the SBR nitrogen rejection facility with level value, and when liquid level arrived the low liquid level of setting, the control unwatering system stopped.
(7) after liquid level sensor detected low level value, unwatering system stopped, and paddle is opened, and the SBR nitrogen rejection facility enters the idle stage.Set idle duration, wait for water inlet next time.
(8) after idle duration was finished, intake pump was opened, and the SBR nitrogen rejection facility enters next circulation, repeats (1)-(7).System stops automatically treating to be finished all cycle indexes afterwards.
Two, the concrete enforcement that jointly controls the control procedure of pattern of pH-ammonia nitrogen is divided into following steps:
(1) system brings into operation, and paddle starts, and intake pump starts, the SBR nitrogen rejection facility begins water inlet, and liquid level sensor feeds back to the PLC control system by to the level detection in the SBR nitrogen rejection facility with level value, when liquid level arrives the high liquid level of setting, control stopping of intake pump.
(2) after intake pump stopped, aerating system started, and the DO concentration in the dissolved oxygen electrode monitoring system is avoided its excessive concentration and the Anammox bacterium is produced inhibiting effect.PH in the pH electrode real-time monitoring system changes, and sets pH range of decrease Δ pH1, along with NH
4 +The carrying out of-N short distance nitration, NO
2 --N constantly generates, and pH continues to reduce, and after the pH fall reached setting value, aerating system quit work.
(3) after aerating system quit work, the Anammox reaction was constantly carried out, and consumes NO
2 --N, pH gos up gradually simultaneously.Set pH amplification Δ pH2, after pH rising amplitude arrived setting value, aerating system was opened, NH
4 +The short distance nitration of-N restarts to carry out NO
2 --N generates again once more, continues the range of decrease of monitoring pH, and (2)-(3) circulation repeats.
(4) along with the circulating start and outage work of aerating system, short distance nitration and Anammox alternately continue to carry out, the NH in the former water
4 +-N constantly is consumed, and ammonia nitrogen electrode reading constantly reduces, and when the ammonia nitrogen that reaches setting was retained concentration value, aerating system quit work.
(5) after aerating system quit work, DO concentration can be reduced to 0.00mgL rapidly in the SBR nitrogen rejection facility
-1, the SBR nitrogen rejection facility enters agitation phases.Certain stirring duration is set, guarantees the NO that generates
2 -The Anammox reaction takes place and is fallen the N of generation by full consumption in-N
2From water, overflow, thereby improve sludge settling property in the SBR nitrogen rejection facility.
(6) after the stirring duration of She Zhiing was finished, paddle quit work, and the SBR nitrogen rejection facility enters precipitate phase, and sludge settling is realized mud-water separation in the bottom of SBR nitrogen rejection facility.
(7) after the precipitation duration was finished, unwatering system was opened, and the supernatant of SBR nitrogen rejection facility is discharged, liquid level sensor passes through the level detection in the SBR nitrogen rejection facility, level value is fed back to the PLC control system, and when liquid level arrived the low liquid level of setting, the control unwatering system stopped.
(8) after liquid level sensor detected low level value, unwatering system stopped, and paddle is opened, and the SBR nitrogen rejection facility enters the idle stage.Set idle duration, wait for water inlet next time.
(9) after idle duration was finished, intake pump was opened, and the SBR nitrogen rejection facility enters next circulation, repeats (1)-(8).System stops automatically treating to be finished all cycle indexes afterwards.
Described aerating system start and stop control for the system that adopts the direct air feed of aeration pump, just refers to the start and stop control of aeration pump; For the system that adopts the high pressure tank air feed, then refer to the open and close controlling of aeration valve.
Described rotating speed of agitator is set according to actual mixing effect.
Dissolved oxygen concentration in the described control SBR nitrogen rejection facility is according to NO
2 --N accumulation situation is adjustable, should control DO＜1.00mgL usually
-1
Described NO
2 --N accumulation is often referred to NO
2 --N concentration＞10.00mgL
-1
Described ammonia nitrogen is retained concentration value, is set at 10.00～30.00mgL usually
-1
Described stirring duration can be according to N
2The effusion effect is set.
Described precipitation duration can be according to the sludge settling property settings.
The high and low level value that described liquid level sensor is set shows the useful volume of system and the exchange volume of phase weekly, and the phase exchanges and do not wait than being generally 10%～50% the SBR nitrogen rejection facility weekly.
Described pH range of decrease Δ pH1 sets, and is meant the reduction value on the pH value basis when aerating system is opened, and specifically should set according to the active height of ammonia oxidation bacteria (AOB).
Described pH amplification Δ pH2 sets, and is meant the lift-off value on the pH value basis when aerating system stops, and specifically should set according to the active height of anaerobic ammonia oxidizing bacteria.
Elaborate below in conjunction with accompanying drawing.
Fig. 9 is a short distance nitration-anaerobic ammoxidation integral type SBR nitrogen rejection facility synoptic diagram of the present invention.Be provided with intake pump 1.1 and plug-flow pump in the reserve tank 1, the SBR nitrogen rejection facility is a uncovered column type pond body, and top is provided with run-down pipe, and the bottom is provided with blow-down pipe, and the place is provided with flowing water Valve at the side differing heights.Be provided with liquid level gauge sensor 5, DO electrode 6.1, pH electrode 6.2, ORP electrode 6.3, EC electrode 6.4 and ammonia nitrogen electrode 7 among the SBR, all be connected to PLC robot control system(RCS) 9 by transmitter 6,7.
The PLC robot control system(RCS) is provided with on-the-spot contact panel 8 and controls with remote computer 10 and control dual mode, is convenient to execute-in-place and the remote monitoring of SBR nitrogen rejection facility in the automatic operating process.The SBR nitrogen rejection facility also be provided with can speed governing paddle 3.1, be provided with micro-pore aeration dish 3.2 in its center, bottom, at SBR nitrogen rejection facility outer wrap muff 2.2 and link to each other with constant temperature water bath 2 by water-bath ebullator 2.1.In addition, also be provided with air compressor 4, pressurized air enters micro-pore aeration dish 3.2 by aeration reduction valve 4.1, aeration electromagnetic valve 4.2 and aeration flowmeter 4.3 successively, for the SBR nitrogen rejection facility provides necessary dissolved oxygen DO; Pressurized air provides pressurized air by air purge reduction valve 4.4, air purge solenoid valve 4.5 and air purge flowmeter 4.6 for ammonia nitrogen cleans at line electrode successively.Water outlet liquid level valve 3.4 is passed through in water outlet successively, line strainer 3.5 and total water outlet electrically operated valve 3.6.
At dissolved oxygen DO-ammonia nitrogen of the present invention and two kinds of control methods of pH-ammonia nitrogen, make up short distance nitration-anaerobic ammoxidation integral type SBR nitrogen rejection facility.This device adopts Siemens S7-300 series of PLC controller, in conjunction with the multiparameter of German WTW at the ammonia nitrogen of line electrode (DO, pH, ORP, EC and T) and grace Si Haosi (Endress+Hauser) at line electrode, realize the increasingly automated operation of short distance nitration-anaerobic ammoxidation integral type SBR technology.The digested sludge dehydration filtrate of certain large-scale wastewater treatment plant is adopted in water inlet, and main water-quality guideline is as shown in table 1.Employing adds NH
4Cl and NaHCO
3Mode improves the ammonia nitrogen and the basicity level of water inlet.
Table 1 digested sludge dehydration filtrate water quality (unit: mgL
-1, except that pH)
| pH | COD | NH 4 +-N | NO 3 --N | NO 2 --N | Basicity |
| 7.90±0.20 | 130.20±41.00 | 154.00±12.20 | 2.80±2.50 | 3.20±5.20 | 1030.40±173.30 |
In conjunction with Fig. 1, Fig. 2 and Fig. 3, respectively dissolved oxygen DO of the present invention-ammonia nitrogen control method and pH-ammonia nitrogen control method are described in detail.
1, dissolved oxygen DO-ammonia nitrogen jointly controls pattern
In water inlet, add NH
4Cl and NaHCO
3, influent ammonium concentration is increased to 700.00mgL
-1PLC control system operation dissolved oxygen DO-ammonia nitrogen control method.Beginning new round week after date, at first paddle starts, and then intake pump is opened, and finishes the water inlet of SBR nitrogen rejection facility in the short time.Aerating system is opened subsequently, regulates the aeration flow, and DO concentration is 0.20～0.30mgL in the control SBR nitrogen rejection facility
-1, under the synergy of ammonia oxidation bacteria (AOB) and anaerobic ammonia oxidizing bacteria, ammonia nitrogen concentration reduces gradually, and pH reduces gradually, NO
2 --N maintains 8.00mgL all the time
-1Below.When ammonia nitrogen concentration is reduced to 30.00mgL gradually
-1The retention concentration value after, aerating system quits work, the SBR nitrogen rejection facility enters the anoxia stirring stage, DO reduces 0.00mgL rapidly
-1Generate NO
2 --N and remaining NH
4 +-N continues to take place the Anammox reaction, makes to contain NO in the water outlet hardly
2 --N, the N of generation
2Fully loss is gone out under beating action, and the effect of settling of mud is not because of there being gas to generate variation.After agitation phases was finished, the SBR nitrogen rejection facility entered precipitate phase, and mud sinks to SBR nitrogen rejection facility bottom rapidly, the upper liquid clarification.Unwatering pump is opened subsequently, and 20L water is discharged SBR.Paddle was opened after draining finished, and the SBR nitrogen rejection facility enters the idle stage, and after the idle stage finished, intake pump was opened again, and the SBR nitrogen rejection facility begins the new round cycle.Fig. 4 has provided interior pH, DO of single cycle of SBR nitrogen rejection facility, ORP, EC and ammonia nitrogen totally four kinds of output results at line electrode.Fig. 5 has provided the NH in the single cycle
4 +-N, NO
3 --N, NO
2 -The situation of change of-N and TN.In dissolved oxygen DO-ammonia nitrogen control method, the hydraulic detention time of SBR nitrogen rejection facility is 1.59d, and the influent ammonia nitrogen load is 0.44kgNH
4 +-Nm
-3D
-1, ammonia nitrogen removal frank is 96.50%, nitrogen removal rate has shown higher denitrification effect up to 93.10%, simultaneously NO
2 --N is stabilized in 8.00mgL
-1Below, thereby avoided it that anaerobic ammonia oxidizing bacteria is produced inhibiting effect.
2, the pH-ammonia nitrogen jointly controls pattern
In water inlet, add NH
4Cl and NaHCO
3, influent ammonium concentration is increased to 250.00mgL
-1PLC control system operation pH-ammonia nitrogen jointly controls pattern.
Beginning new round week after date, at first paddle starts, and then intake pump is opened, and finishes the water inlet of SBR nitrogen rejection facility in the short time.Aerating system is opened subsequently, regulates the aeration flow, and DO concentration is 0.10～0.20mgL in the control SBR nitrogen rejection facility
-1After aerating system began, under the synergy of ammonia oxidation bacteria (AOB) and anaerobic ammonia oxidizing bacteria, ammonia nitrogen concentration reduced gradually, but pH also reduces gradually simultaneously.Utilize the fluctuation of pH to control the aerating system start and stop as shown in Figure 6, the fall of pH and intrasystem NO
2 --N accumulation situation is directly proportional, and the pH range of decrease that is set in aeration phase is Δ pH1, at the aerating system NO of the finish time
2 --N concentration on average has only 4.14mgL
-1After Δ pH1 reached, aerating system stopped, and DO drops to 0.00mgL at short notice rapidly
-1, the SBR nitrogen rejection facility enters the anoxia stirring stage, and the short distance nitration reaction stops, and has only the Anammox reaction to carry out separately, the NO of accumulation before consuming
2 --N, rising amplitude and the NO of pH slight rebound can appear, in pH simultaneously
2 -The consumption of-N is proportional, and the pH amplification that is set in the anoxia stirring stage is Δ pH2, can guarantee the NO that accumulates
2 --N is consumed.After Δ pH2 reached, aerating system started once more, and so circulation goes down to be reduced to the 30.00mgL of setting until ammonia nitrogen concentration
-1Retain concentration.When ammonia nitrogen electrode detector ammonia nitrogen concentration in the SBR drops to 30.00mgL
-1The time, aerating system quits work, and SBR enters the anoxia stirring stage, and DO reduces 0.00mgL rapidly
-1The NO that generates
2 --N and remaining NH
4 +-N continues to take place the Anammox reaction, makes to contain NO in the water outlet hardly
2 --N, the N of generation
2Fully loss is gone out under beating action, and the effect of settling of mud is not because of there being gas to generate variation.After agitation phases was finished, the SBR nitrogen rejection facility entered precipitate phase, and mud sinks to SBR nitrogen rejection facility bottom rapidly, the upper liquid clarification.Unwatering pump is opened subsequently, and 20L water is discharged the SBR nitrogen rejection facility.Paddle was opened after draining finished, and the SBR nitrogen rejection facility enters the idle stage, and after the idle stage finished, intake pump was opened again, and the SBR nitrogen rejection facility begins the new round cycle.Fig. 7 has provided interior pH, DO of single cycle of SBR nitrogen rejection facility, ORP, EC and ammonia nitrogen totally four kinds of results at line electrode, and the fluctuation of pH variation causes other electrode readings also to become fluctuation to change as can be seen.Fig. 8 has provided the NH in the single cycle
4 +-N, NO
3 --N, NO
2 -The situation of change of-N and TN.Jointly control under the pattern at the pH-ammonia nitrogen, the hydraulic detention time of SBR nitrogen rejection facility is 1.86d, and the influent ammonia nitrogen load is 0.14kgNH
4 +-Nm
-3D
-1, the ammonia nitrogen rate of going out is 89.60%, nitrogen removal rate is 86.60%, has shown higher denitrification effect, simultaneously NO
2 --N is stabilized in 5.00mgL
-1Below.
Claims (4)
1. the control method of short distance nitration-anaerobic ammoxidation integral type SBR denitrification process is respectively dissolved oxygen DO-ammonia nitrogen control method and pH-ammonia nitrogen control method; Wherein:
Dissolved oxygen DO-ammonia nitrogen control method be utilize dissolved oxygen DO at line electrode and ammonia nitrogen at line electrode, control aeration rate by dissolved oxygen DO at line electrode, and then NO among the control SBR
2 --N concentration level, the short distance nitration of realization ammonia nitrogen and Anammox are reflected among the same SBR and carry out synchronously, retain concentration by the ammonia nitrogen of ammonia nitrogen in line electrode control SBR;
PH-ammonia nitrogen control method be utilize pH at line electrode and ammonia nitrogen at line electrode, control stopping of aerating system by pH at the range of decrease Δ pH1 in nitrated stage, by the unlatching of pH at the amplification Δ pH2 in Anammox stage control aerating system, the short distance nitration of realization ammonia nitrogen and Anammox are reflected among the same SBR and hocket, and retain concentration by the ammonia nitrogen of ammonia nitrogen in line electrode control SBR.
2. control method according to claim 1, wherein, whole short distance nitration-anaerobic ammoxidation integral type SBR denitrification process is divided into into water, reaction, stirring, precipitation, draining and idle six steps.
3. control method according to claim 1, wherein, dissolved oxygen concentration is at 1.00mgL among dissolved oxygen DO-ammonia nitrogen control method control SBR
-1Below, control aerobic stage NO
2 --N concentration is at 10.00mgL
-1Below, it is 10.00～30.00mgL that the control ammonia nitrogen is retained concentration
-1
4. control method according to claim 1, wherein, pH-ammonia nitrogen control method control aerobic stage NO
2 --N concentration is at 10.00mgL
-1Below, it is 10.00～30.00mgL that the control ammonia nitrogen is retained concentration
-1
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103601341A (en) * | 2013-11-22 | 2014-02-26 | 北京工业大学 | SBR (Sequencing Batch Reactor) and SBBR (Sequencing Biofilm Batch Reactor) municipal sewage high-efficiency biological treatment method and device based on anaerobic ammonia oxidation |
| CN103708614A (en) * | 2013-12-18 | 2014-04-09 | 青岛思普润水处理有限公司 | Anaerobic ammonia oxidation and aerobic oxygen limited starting method based on MBBR (Moving Bed Biofilm Reactor) |
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| CN103601341B (en) * | 2013-11-22 | 2015-05-20 | 北京工业大学 | SBR (Sequencing Batch Reactor) and SBBR (Sequencing Biofilm Batch Reactor) municipal sewage high-efficiency biological treatment method and device based on anaerobic ammonia oxidation |
| CN103601341A (en) * | 2013-11-22 | 2014-02-26 | 北京工业大学 | SBR (Sequencing Batch Reactor) and SBBR (Sequencing Biofilm Batch Reactor) municipal sewage high-efficiency biological treatment method and device based on anaerobic ammonia oxidation |
| CN103708614A (en) * | 2013-12-18 | 2014-04-09 | 青岛思普润水处理有限公司 | Anaerobic ammonia oxidation and aerobic oxygen limited starting method based on MBBR (Moving Bed Biofilm Reactor) |
| CN104961233A (en) * | 2015-06-18 | 2015-10-07 | 北京工业大学 | Device and method for adjusting coupling intermittent aeration to start shortcut nitrification of urban sewage by using dissolved oxygen |
| CN105000753A (en) * | 2015-07-08 | 2015-10-28 | 济南大学 | Device and method for recovering nitrogen and phosphorus in sewage and improving biological productivity of microalgae |
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| CN107098466A (en) * | 2017-04-28 | 2017-08-29 | 中国科学院生态环境研究中心 | The real-time monitoring method of anaerobic membrane bioreactor and use its reactor |
| CN107337325A (en) * | 2017-09-04 | 2017-11-10 | 北京城市排水集团有限责任公司 | The integral anaerobic ammonium oxidation apparatus and its operation method of a kind of Treating Municipal Sewage |
| CN107337325B (en) * | 2017-09-04 | 2023-06-06 | 北京城市排水集团有限责任公司 | Integrated anaerobic ammonia oxidation device for treating urban sewage and operation method thereof |
| CN108147536B (en) * | 2017-12-28 | 2020-12-11 | 中国科学院生态环境研究中心 | Prevention and control method for biological denitrification process over-aeration |
| CN108147536A (en) * | 2017-12-28 | 2018-06-12 | 中国科学院生态环境研究中心 | The prevention and control method of biological denitrification process excess aeration |
| CN108383239B (en) * | 2018-03-13 | 2021-03-16 | 北京工业大学 | Integrated biological treatment process for shortcut nitrification anaerobic ammonia oxidation and phosphorus removal under intermittent aeration mode |
| CN108585214B (en) * | 2018-03-13 | 2023-12-19 | 西安建筑科技大学 | Short-cut nitrification and anaerobic ammonia oxidation integrated DMBR-SBR reactor and process thereof |
| CN108383239A (en) * | 2018-03-13 | 2018-08-10 | 北京工业大学 | The integral biological treatment process of short distance nitration Anammox dephosphorization simultaneously under intermittent aerating pattern |
| CN108585214A (en) * | 2018-03-13 | 2018-09-28 | 西安建筑科技大学 | A kind of the DMBR-SBR reactors and its technique of short distance nitration and Anammox integral type |
| CN108773972A (en) * | 2018-06-01 | 2018-11-09 | 北京建筑大学 | The method that depth carbon and nitrogen removal is realized using half short distance nitration-anaerobic ammoxidation-electroxidation Treating Municipal Sewage factory sludge-digestion liquid |
| WO2020115647A1 (en) | 2018-12-04 | 2020-06-11 | Tubitak | A method for enrichment of anaerobic ammonium oxidation bacteria in automatized batch reactor |
| CN110156177B (en) * | 2019-07-02 | 2022-02-08 | 青岛大学 | Intermittent vertical flow artificial wetland denitrification simulation experiment device and experiment method |
| CN110156177A (en) * | 2019-07-02 | 2019-08-23 | 青岛大学 | Intermittent vertical current constructed wetland denitrogenation imitative experimental appliance and experimental method |
| CN111547853A (en) * | 2020-05-22 | 2020-08-18 | 广西春晖环保工程有限责任公司 | Denitrification process of double shortcut nitrification-anaerobic ammonia oxidation |
| CN111547852A (en) * | 2020-05-22 | 2020-08-18 | 广西春晖环保工程有限责任公司 | Control method of integrated shortcut nitrification-anaerobic ammonia oxidation denitrification process |
| CN111912948A (en) * | 2020-08-05 | 2020-11-10 | 北京师范大学 | Device and method for simulating and researching nitrogen conversion of river water-suspended particle-sediment system |
| CN114590895A (en) * | 2020-12-04 | 2022-06-07 | 中国石油天然气集团有限公司 | Multistage circulating denitrification treatment device and multistage circulating denitrification treatment process for rare earth tail water |
| CN114590895B (en) * | 2020-12-04 | 2023-05-26 | 中国石油天然气集团有限公司 | Multistage circulation denitrification treatment device and multistage circulation denitrification treatment process for rare earth tail water |
| CN115571982A (en) * | 2022-10-08 | 2023-01-06 | 中国电建集团华东勘测设计研究院有限公司 | Biological denitrification method of bacteria-algae symbiotic system based on pH and DO control |
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