CN103011409A - Method for realizing stable operation of nitrosification of domestic sewage in sequencing batch reactor (SBR) by using intermittent aeration - Google Patents
Method for realizing stable operation of nitrosification of domestic sewage in sequencing batch reactor (SBR) by using intermittent aeration Download PDFInfo
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- CN103011409A CN103011409A CN2012105114669A CN201210511466A CN103011409A CN 103011409 A CN103011409 A CN 103011409A CN 2012105114669 A CN2012105114669 A CN 2012105114669A CN 201210511466 A CN201210511466 A CN 201210511466A CN 103011409 A CN103011409 A CN 103011409A
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Abstract
The invention discloses a method for realizing stable operation of nitrosification of domestic sewage in a sequencing batch reactor (SBR) by using intermittent aeration, and belongs to the field of urban sewage treatment and recycling. The method comprises the following steps of: inoculating nitrosification sludge into the SBR at the temperature being between 20 and 25 DEG C; and respectively researching the stable operation condition of a nitrosification system in a low dissolved oxygen (DO) level (the DO is equal to 0.7mg/L), a medium DO level (the DO is equal to 1.5mg/L) and a high DO level (the DO is equal to 3.0mg/L) by taking the actual domestic sewage as a research object through adopting an operation mode of intermittent aeration. By adopting the operation mode of the intermittent aeration, the SBR can keep a high ammoxidation ratio (more than 85 percent) and a high nitrosification ratio (more than 95 percent) at the three DO levels, the chemical oxygen demand (COD) removal rate is up to more than 80 percent, and the effluent COD is less than 50mg/L, so that the stable operation of the nitrosification is realized. By adopting the method, the problem of the unstable operation of the nitrosification at the high DO level is solved, the COD and ammonia nitrogen can be removed efficiently at the same time, and a method for realizing the long-term, efficient and stable operation of the nitrosification is provided.
Description
Technical field
The invention belongs to municipal sewage treatment and resource utilization field.Be specifically related to be exclusively used in the method for sanitary sewage SBR nitrosification steady running under normal temperature, the different DO level.
Background technology
At present, organism in the sewage, nitrogen phosphorus and other pollutents and processing cost are low is used widely in sewage work and develops biological denitrification phosphorous removal technique because it can be removed simultaneously.The ultimate principle of traditional biological denitrification process is that sewage is in the biological denitrificaion treating processes, organic nitrogen is changed into ammonia nitrogen by ammonifying bacteria first, then ammonia nitrogen is converted into nitrite nitrogen and nitric nitrogen under the effect of ammonia oxidation bacteria (AOB) and NOB (NOB), nitric nitrogen finally is reduced to nitrogen at last under the denitrification of denitrifying bacteria, thereby finishes the step of whole denitrogenation.Dissolved oxygen, inorganic carbon source (basicity), organic carbon source that whole process consumption is a large amount of, and the carbon source of sanitary sewage is not enough to satisfy the consumption of technique, need to add the guarantee treatment effect.Therefore the traditional biological denitrification process has not only prolonged the denitrification reaction course, and also causes the waste of the energy and additional carbon.
With short distance nitration (NH
4 +-NO
2 -) for the short-cut denitrification technology of core be the study hotspot of current nitrogenous effluent treatment.Realize short distance nitration, namely utilize the intrinsic difference of ammonia oxidation bacteria (AOB) and NOB (NOB) growth kinetics, nitrifying process can be controlled at NO by factors such as control temperature, DO, pH, free ammonia (FA), SRT
2 -Stage stops its further oxidation, thereby forms a large amount of NO
2 -Accumulation.Comparable conventional art reduces 25% nitrated oxygen requirement, 40% carbon source and 50% sludge yield on this stage theory.But if will keep nitrosification operation steady in a long-term, operational conditions and influent quality are all extremely harsh, such as low DO, high pH, high temperature, short SRT.And under the low DO, ammonia oxidation speed is lower, and sludge loading is lower, easily causes Filamentous Bulking; Mud easily runs off under the short SRT, and sludge discharge; NOB can progressively adapt to high FA and low DO environment.
DO concentration is to keep the key factor of nitrosification system stable operation.Because AOB is 0.2-0.4 mg/L to the avidity (DO semi-saturation number is 1.2-1.4 mg/L) of dissolved oxygen greater than NOB(DO semi-saturation constant), therefore can under low DO, effectively realize accumulation of nitrite.But the mass concentration of DO is crossed to hang down and can be caused aerobic nitrite bacteria to be subjected to the inhibition of low-oxygen environment, and the mass concentration of DO is too high, can cause nitrite bacteria little to the competitive edge of nitrite-oxidizing bacteria, NO
2 --N cumulative percentage is low.In the great majority research, when utilizing the aeration mode of continuous aeration to carry out normal temperature sanitary sewage SBR nitrosification, average DO concentration all below 3mg/L, its operation steady in a long-term of guarantee.If average DO is greater than 3mg/L, the activity of NOB can be recovered greatly, makes system be tending towards collapse.Therefore the long-term stability operation that how to guarantee nitrosification system under high DO high oxidization rate requires study.
In sum, for the sanitary sewage under the low ammonia nitrogen condition of normal temperature, the not enough 1.00mg/L of FA, the not enough 0.01mg/L of FNA based on temperature, FA, FNA, low DO suppression strategy, now can not effectively implement.Therefore how to keep under the low ammonia nitrogen condition of normal temperature the nitrosifying long-term efficient and stable operation of sanitary sewage and demand research urgently.
Summary of the invention
The object of the present invention is to provide a kind of for city domestic sewage, be under normal temperature, the low ammonia nitrogen condition, utilize intermittent aeration (it is 30-35min/10-15min that aeration stops the time of exposing to the sun) to realize that sanitary sewage SBR nitrosification keeps the method for steady running under basic, normal, high three kinds of initial DO levels.
The principle of intermittent aeration is, the activity of AOB and NOB is suppressed under anaerobic environment, and the ammonia oxidation process is obstructed, and in case recover aeration, the AOB of experience long-term " hunger " can utilize the ammonia production capacity to breed in a large number more, and NOB can not very fast activity recovery.When intermittent aeration, stopping exposing to the sun also to make the of short duration anaerobic environment of appearance in the system, and the condition of this low dissolved axygen also is conducive to AOB to the competition of matrix.As calculated, the Specific incremental rate of AOB is not subject to obvious impact in the Intermittent Aeration System, with the 0.60d of continuous aeration system
-1Quite.The Specific incremental rate of NOB can decrease to some degree in Intermittent Aeration System.Therefore Intermittent Aeration System can suppress the growth of NOB better, more is conducive to sanitary sewage SBR nitrosification Systems balanth operation under the high DO of normal temperature.
The invention provides a kind of method of keeping sanitary sewage nitrosification steady running under the low ammonia nitrogen condition of normal temperature, it is characterized in that:
In the SBR nitrosation reactor, utilize the aeration mode of intermittent aeration, at three kinds of initial DO(0.5-1.0mg/L, 1.5-2.0mg/L, 2.5-3.0mg/L) under the level, each DO level run is more than 20 days (40 cycles), calculate the ratio of the initial COD concentration of COD concentration that the COD clearance namely reacts removal and reaction, the nitrous rate is namely reacted nitrite and the nitrite of accumulation and the ratio of nitrate sum of accumulation.If the COD clearance all reaches more than 80%, the nitrous rate all reaches more than 90%, illustrates under above three kinds of initial DO levels all can guarantee nitrosifying steady running.
The method of keeping nitrosification steady running provided by the present invention, it is the operation strategy by intermittent aeration, under normal temperature, low ammonia nitrogen condition, take city domestic sewage as research object, inoculation nitrous rate reaches the nitrosification mud more than 95%, at three kinds of initial DO(0.5-1.0mg/L, 1.5-2.0mg/L, 2.5-3.0mg/L) under the level, realize the nitrosifying steady running of municipal effluent in sequence bioreactor (SBR) mode.Concrete steps are as follows:
Step 1: reactor is built
Reactor adopts the sbr reactor device, and reactor is equipped with aerating apparatus, can control dissolved oxygen concentration in the reactor waste water by regulating aeration rate.Reactor arranges simple automatic control device, realizes automatic feeding water, reaction, precipitation, drainage flow path.
Step 2: seed sludge
Inoculate nitrous rate that high ammonia nitrogen water distribution starts and reach nitrosification mud 95% or more, place the sbr reactor device, pass into city domestic sewage, begin aeration.
Step 3: nitrosification mud laundering period
Controlling initial DO and be 0.5-1.0mg/L and aeration/stop the time of exposing to the sun is the intermittent aeration strategy of 30-35min/10-15min, ammonia nitrogen, inferior nitrogen, nitre nitrogen and the COD concentration of monitoring Inlet and outlet water every day, and calculate nitrous rate and COD clearance.Move 2 cycles every day, move 10 days more than (20 cycles).If the COD clearance reaches more than 80%, the nitrous rate reaches more than 90%, has adapted to the environment of sanitary sewage just the nitrosification mud of high ammonia nitrogen water distribution startup is described, heterotrophic bacterium and autotrophic bacteria have reached certain running balance.
Step 4: nitrosifying steady running under three kinds of DO levels
Adopting aeration/stop the time of exposing to the sun is the intermittent aeration strategy of 30-35min/10-15min, and controlling respectively initial DO is 0.5-1.0mg/L, 1.5-2.0mg/L, 2.5-3.0mg/L, and each DO level run is more than 20 days (40 cycles).Ammonia nitrogen, inferior nitrogen, nitre nitrogen and the COD concentration of monitoring Inlet and outlet water every day are calculated the COD clearance always all more than 80%, and the nitrous rate is always more than 90%, and this moment, the operation scheme of intermittent aeration can be kept the low nitrosifying steady running of ammonia nitrogen sanitary sewage of normal temperature.
Compare with traditional continuous aeration method, advantage of the present invention is:
(1) compare with continuous aeration, the Specific incremental rate of AOB is not subject to obvious impact in the Intermittent Aeration System, and the Specific incremental rate of NOB can decrease to some degree.Therefore intermittent aeration is conducive to suppress the growth of NOB more, thereby is conducive to the long-term stability operation of nitrosification system.
(2) intermittent aeration is reflected more clearly when moving under high DO than the advantage of continuous aeration.And that high DO can solve under the low DO sludge activity is low, a series of problems such as the low and thread fungus expansion of ammonia oxidation speed.
(3) in addition, intermittent aeration also is expected to solve Short-Cut Nitrification Process to the harshness requirement of operational conditions and influent quality and moves shortcoming:
1) operational conditions is harsh, high pH, high temperature, short SRT, low DO;
2) in the long sludge age, NOB can progressively adapt to high FA and low DO environment;
3) mud easily runs off under the short SRT, and sludge discharge is large.
The invention will be further described below in conjunction with embodiment, but protection scope of the present invention is not limited to this.
Description of drawings
Fig. 1 is reactor laundering period operating performance figure among the present invention, and wherein the △ nitrite nitrogen is Inlet and outlet water nitrite nitrogen concentration difference; The △ nitrate nitrogen is Inlet and outlet water nitrate nitrogen concentration difference.
Fig. 2 is (initial DO=0.5-1.0mg/L) the operating performance figure of reactor fs among the present invention, and wherein the △ nitrite nitrogen is Inlet and outlet water nitrite nitrogen concentration difference; The △ nitrate nitrogen is Inlet and outlet water nitrate nitrogen concentration difference.
Fig. 3 is reactor subordinate phase among the present invention (initial DO=1.5-2.0mg/L) operating performance figure, and wherein the △ nitrite nitrogen is Inlet and outlet water nitrite nitrogen concentration difference; The △ nitrate nitrogen is Inlet and outlet water nitrate nitrogen concentration difference.
Fig. 4 is (initial DO=2.5-3.0mg/L) the operating performance figure of reactor reaction device phase III among the present invention, and wherein the △ nitrite nitrogen is Inlet and outlet water nitrite nitrogen concentration difference; The △ nitrate nitrogen is Inlet and outlet water nitrate nitrogen concentration difference.
Embodiment
Test is take certain community life sewage as basic water, and concrete water quality is as follows: COD=300-400mg/L, BOD
5=120-150mg/L, SS=76-114 mg/L, TP=5.75-6.30mg/L, NH
4 +-N=75-90mg/L, NO
2 --N≤0.25mg/L, NO
3 --N≤1.5mg/L, TP≤1mg/L, pH=7.0-7.8, basicity is that 550.59-610.78mg/L(is with CaCO
3Meter).
Concrete processing is as follows:
(1) stage adaptive phase
Reactor inoculation be to reach nitrosification mud 95% or more by the nitrous rate that high ammonia nitrogen water distribution starts, process at normal temperatures sanitary sewage, the aeration control strategy of employing intermittent aeration, aeration/stop the time of exposing to the sun is 30min/10min.Because what start that nitrosification mud adopts is high ammonia nitrogen water distribution without COD, causes the number of heterotrophic bacteria in the seed sludge extremely low, shows that the COD clearance is very low in front several cycle.Therefore planting mud needs to make heterotrophic bacterium propagation through one period adaptive phase, and the initial DO of adaptive phase adopts 0.5-1.0mg/L.After 10 days (20 cycles) of operation, the heterotrophic bacterium in the mud is increased in a large number, and the COD clearance raises gradually, and the COD clearance in the 19th cycle reaches more than 80%, and water outlet COD is below 50mg/L, and this indicates that also the adaptive phase finishes.The ammonia oxidation rate in stage adaptive phase maintains more than 80% always, and nitrosification maintains more than 98%.Because DO is extremely low, sludge activity is very low, causes ammonia nitrogen volumetric loading and sludge loading very low, respectively at 0.15-0.2kgN/m
3About/d and 0.05kgN/kgMLSS/d.As shown in Figure 1.
(2) fs
After adaptive phase finished, continuing to keep initial DO was 40 cycles of level run of 0.5-1.0mg/L, and ammonia oxidation rate maintains more than 80% always, and the nitrous rate maintains more than 95%, and the COD clearance remains on more than 80%.Illustrate that initial DO level is that 0.5-1.0mg/L can keep the operation of SBR nitrosification Systems balanth.Ammonia nitrogen volumetric loading and sludge loading remain on the level of adaptive phase substantially, respectively at 0.2-0.25kgN/m
3About/d and 0.05kgN/kgMLSS/d.As shown in Figure 2.
(3) subordinate phase
Continue to improve initial DO to 1.0-1.5mg/L, the running condition of observing nitrosation reactor.(40 cycles) rear ammonia oxidation rate maintains more than 80% always to move 20 days, and the COD clearance is more than 80%, and nitrosification maintains more than 95%, still can guarantee the operation of nitrosification Systems balanth.Because the raising of DO, the activity of AOB increases, and ammonia oxidation speed improves, so ammonia nitrogen volumetric loading and sludge loading had raising to a certain degree during than the DO=0.5-1.0mg/L level, is respectively 0.3-0.4kgN/m
3About/d and 0.08kgN/kgMLSS/d.As shown in Figure 3.
(4) phase III
Continue to improve initial DO to 2.5-3.0mg/L, can observe nitrosation reactor steady running.(40 cycles) rear ammonia oxidation rate maintains more than 80% always to move 20 days, and the COD clearance is more than 80%, and the nitrous rate maintains more than 90%, has realized the nitrosifying steady running of sanitary sewage SBR under the high DO.Improve DO so that ammonia nitrogen volumetric loading and sludge loading have had further raising, be respectively 0.5-0.65kgN/m
3About/d and 0.15kgN/kgMLSS/d.
Continue to keep again afterwards 2.5-3.0mg/L the DO level run 15 days, the COD clearance is always more than 80%, the nitrous rate also maintains more than 90% always, illustrates that the nitrosification system has reached the state of steady running really.As shown in Figure 4.
This test utilizes the normal temperature sanitary sewage SBR nitrosification system of intermittent aeration mode (aeration/stop the time of exposing to the sun be 30min/10min) operation at low DO(0.5-1.0mg/L), middle DO(1.5-2.0mg/L) and high DO(2.5-3.0mg/L) condition under all can realize efficiently removing in steady running and COD and the ammonia nitrogen.
Claims (1)
1. method of utilizing intermittent aeration to realize sanitary sewage SBR nitrosification steady running is characterized in that:
At first inoculate the nitrous rate and reach nitrosification mud more than 95%, in operation under the aeration mode of intermittent aeration more than 10 days, aeration/stop the time of exposing to the sun is 30-35min/10-15min, and initial DO concentration is 0.5-1.0mg/L; Calculate the ratio of the initial COD concentration of COD concentration that the COD clearance of reaction when finishing react removal and reaction, and calculate nitrite and the nitrite of accumulation and the ratio of nitrate sum that the nitrous rate is namely reacted accumulation; The COD clearance that calculates water outlet greater than 80% and the nitrous rate greater than 90%, this moment, seed sludge adapted to the running environment of sanitary sewage;
More than 20 days, aeration/stop the time of exposing to the sun is 30-35min/10-15min in operation under the aeration mode of intermittent aeration in continuation, and initial DO concentration is 0.5-1.0mg/L, and the COD clearance of water outlet is always greater than 80%, and the nitrous rate is always greater than 90%; Enter afterwards subordinate phase, improve initial DO concentration to 1.5-2.0mg/L, move more than 20 days in the intermittent aeration mode, aeration/stop the time of exposing to the sun is 30-35min/10-15min, and the COD clearance of water outlet is always greater than 80%, and the nitrous rate is always greater than 90%; Phase III, continue to improve initial DO concentration to the level of 2.5-3.0mg/L, the intermittent aeration operation is more than 20 days, aeration/stop the time of exposing to the sun is 30-35min/10-15min, the COD clearance of water outlet is always greater than 80%, the nitrous rate has namely successfully realized the steady running of sanitary sewage SBR nitrosification system under three DO levels always greater than 90%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129853A (en) * | 2014-07-04 | 2014-11-05 | 广州市市政工程设计研究院 | Starting method for rapid and efficient short-cut nitrification |
| CN109110920A (en) * | 2018-09-17 | 2019-01-01 | 沈阳环境科学研究院 | A kind of SBR partial nitrification technique matching Anammox |
-
2012
- 2012-12-03 CN CN201210511466.9A patent/CN103011409B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| 张辉等: "间歇曝气短程硝化控制新途径的初步试验研究", 《新疆环境保护》 * |
| 李亚峰等: "间歇曝气条件下短程硝化的实现及影响因素研究", 《环境工程学报》 * |
| 王建龙等: "复合生物反应器亚硝酸型同步硝化反硝化", 《北京工业大学学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129853A (en) * | 2014-07-04 | 2014-11-05 | 广州市市政工程设计研究院 | Starting method for rapid and efficient short-cut nitrification |
| CN104129853B (en) * | 2014-07-04 | 2016-04-27 | 广州市市政工程设计研究总院 | A kind of starting method of quick short distance nitration |
| CN109110920A (en) * | 2018-09-17 | 2019-01-01 | 沈阳环境科学研究院 | A kind of SBR partial nitrification technique matching Anammox |
| CN109110920B (en) * | 2018-09-17 | 2022-02-01 | 沈阳环境科学研究院 | SBR partial nitrosation process matched with anaerobic ammonia oxidation |
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