CN101289247B - Single-stage aerobic biological denitrification operation method of sequencing batch reactor - Google Patents
Single-stage aerobic biological denitrification operation method of sequencing batch reactor Download PDFInfo
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- CN101289247B CN101289247B CN2008100314520A CN200810031452A CN101289247B CN 101289247 B CN101289247 B CN 101289247B CN 2008100314520 A CN2008100314520 A CN 2008100314520A CN 200810031452 A CN200810031452 A CN 200810031452A CN 101289247 B CN101289247 B CN 101289247B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to an operation method of single-stage aerobic biological nitrogen loss in a sequencing batch reactor, which is used for the treatment of waste water containing ammonia nitrogen. The method adopts the general sequencing batch reactor and includes the steps that sewage first enters the SBR and aerobic aeration is conducted directly to the sewage; the concentration of the dissolved oxygen in the SBR is 6mg/L at the beginning of the aerobic aeration and the pH value is adjusted to be 7 by NaHCO3 and 0.5 M HCl; the aerobic aeration lasts for 4h and then is completed; the solution is settled for about 0.5h then; water is discharged next and the water power staying time in the reactor is about 12h; sludge is discharged to stabilize the sludge concentration which is about 4000mg/L in the reactor and control the sludge age which is about 10d; finally the reactor is kept still for about 9.5h. By adopting the single-stage aerobic technique, the method realizes the biological nitrogen loss and adjusts the pH value to restrain the growth of nitrifying bacteria and realizes the synchronous removal of organism and nitrogen by direct oxidation, thus reducing the infrastructure and operating costs of the nitrogen-contained sewage treatment.
Description
Technical field
The present invention relates to utilize the treatment process of the nitrogen-containing wastewater of microorganism excess absorbed nitrogen element, belong to technical field of sewage in the environment protection.
Technical background
Along with the Chinese society rapid economy development, improving constantly of industrialization and urbanization degree, China's shortage of water resources and water pollution problems become increasingly conspicuous, and have had a strong impact on the people's quality of life and healthy, are restricting the sustainable coordinated development of Chinese society, economy and environment.Wherein nitrogen is one of main environmental pollution factors.The nitrogenous fertilizer of using from sanitary sewage, agricultural and the nitrogen of some trade effluents enter the eutrophication that rivers and lakes cause water body and have brought tremendous loss to industrial and agricultural production, and nitric nitrogen and nitrite nitrogen also have a strong impact on the growth of fish and form the mankind are had three objectionable impuritiess that cause effect, these not only seriously restrict the Sustainable development of national economy, cause appreciable financial loss, and to people's lives and healthy even the people's basic life condition caused very big threat.Along with the aggravation of nitrate pollution and the enhancing of people's Environmental awareness, denitrogenate technology particularly biological removal of nitrogen Study on Technology and exploitation caused the common concern of countries in the world, how removing nitrogen in the water body becomes one of the emphasis of water prevention and cure of pollution circle research and focus.
In the waste water ultimate principle of biological denitrificaion be based upon the tradition nitrated/the denitrification basis on.Ammonia nitrogen in the sewage is under aerobic (Oxic) condition, by the aerobic autotrophic type Nitrosomas and the effect of Nitromonas, ammonia nitrogen in the waste water is oxidized to nitrite nitrogen or nitrate nitrogen, then under anoxic (Anoxic) condition, utilize denitrifying bacterium (denitrifier) that nitrite and nitrate are converted into nitrogen and from waste water, overflow, thereby reach the purpose of denitrogenation from waste water.The representational biological denitrification process of setting up on the basis of this biological denitrificaion theory is A/O technology (Anoxic/Oxic), the characteristics of this technology are that the denitrification section is preposition, make the nitrate that obtains nitrated generation in the Aerobic Pond in the anoxic pond, thereby improved the nitric efficiency of system.In recent years, around effectively utilizing carbon source, cutting down the consumption of energy and improving problem such as clearance constantly has progress, and wherein representational achievement comprises: aerobic denitrification, different oxygen be nitrated, based on the full autotrophic denitrogenation of Anammox etc.No matter be traditional denitrification process or up-to-date denitrogenation research, the biological denitrification process of city domestic sewage remains on the basis that is based upon traditional denitrogenation theory (nitrated-denitrification).Reach good Nitrogen removal effect, just need set up the aerobic/anoxic alternative environment that is fit to nitrifier, denitrifying bacteria growth in the reactive system, so all there is following problem in biological denitrification process: the complete nitrated a large amount of oxygen of consumption that needs of ammonia nitrogen has increased power consumption and working cost; System keeps higher biological concentration and obtains good denitrification effect, must carry out mud backflow and nitrification liquid simultaneously and reflux, and has increased power consumption and working cost; Than low waste water, need input to add organic carbon source, every gram NO to C/N (carbon/nitrogen)
3-N denitrification is N
2The time, heterotrophic denitrifying bacteria need consume 3.5-4.5gCOD (chemical oxygen demand (COD)), has increased working cost; For in and in the nitrifying process basicity that produces need add in the alkali and increased processing costs; Technical process is longer, and floor space is big, the initial cost height.Although various both at home and abroad about the research report of wastewater biological denitrificaion aspect, be mostly tradition nitrated/basis of denitrification biological denitrogenation on to the improvement of biological denitrification process.So far do not find both at home and abroad about utilizing microorganism excess absorbed nitrogen element to realize the bibliographical information of biological denitrificaion.
Summary of the invention
The objective of the invention is, the true deficiency that prior art is existed, a kind of single-stage aerobic biological denitrification operation method of sequencing batch reactor is proposed, it adopts common sequencing batch reactor (that is: SRB reactor), utilize microorganism excess absorbed nitrogen element, realize biological denitrificaion, regulate the growth that the pH value suppresses nitrifier with SBR single-stage aerobic process, synchronous removal by oxidation step realization organism and nitrogen reduces capital construction and running cost that nitric wastewater is handled.
Technical scheme of the present invention is, the single-stage aerobic biological denitrification operation method of described sequencing batch reactor (SRB reactor) adopts the common sequencing batch reactor 7 (referring to Fig. 1) that inlet valve 2, flowing water Valve 3, spoil disposal valve 5 are housed, this reactor bottom is equipped with the aeration head 8 that connects with air compressor 11 through under meter 9, it is characterized in that, carry out as follows:
A. open inlet valve 2, sewage enters sbr reactor device 7 from water inlet pipe 1, after sewage to be advanced finishes, closes inlet valve 2;
B. open air compressor machine 11, sewage in the reactor is directly carried out aerobic aeration, regulate under meter 9, sbr reactor device 7 interior dissolved oxygen concentrations (DO) were 5.8mgL when aeration was begun
-1-6.2mgL
-1, use NaHCO
3Regulate the pH value with 0.5M HCL, make that the pH value is controlled at 6.8-7.2 in the reaction process, the aerobic aeration time is 3.8h-4.2h;
C. close air compressor 11, finish aeration; Precipitation 0.4h-0.6h is to realize mud-water separation;
D. open water discharging valve 3, making the interior hydraulic detention time of reactor is 11h-13h; Draining is closed water discharging valve 3 after finishing;
E. open spoil disposal valve 5 and carry out spoil disposal,, make that activated sludge concentration is 3800mgL in the reactor to stablize sludge concentration, control mud age
-1-4200mgL
-1, mud mud age is 8d-12d;
F. after spoil disposal finished, reactor left standstill 9h-10h.
Below the present invention made further specify.
SBR single-stage aerobic process of the present invention realizes that the principle of the operation method of biological denitrificaion is based on the microorganism excess absorbing phenomenon that the applicant finds in early-stage Study.Some microorganisms particularly heterotrophic microorganism the excess picked-up behavior to matrix such as organic carbon source, nitrogen can occur after having experienced abundant with the poor environmental change of matrix repeatedly.
Because traditional biological denitrogenation theory comprises nitrated/two classical processes of denitrification, and classical nitration reaction comprises:
Nitrosation reaction: 55NH
4 ++ 109HCO
3 -+ 76O
2→
C
5H
7O
2N+54NO
2 -+57H
2O+104H
2CO
3 (1)
Nitration reaction: 400NO
2 -+ NH
4 ++ 4H
2CO
3+ 195O
2→
C
5H
7O
2N+400NO
3 -+3H
2O (2)
From equation (1), (2) as can be seen, ammonia nitrogen is oxidized to nitrous acid nitrogen by Nitrosomas earlier in aerobic processes, and nitrous acid nitrogen further is oxidized to nitrate nitrogen.And Nitrosomas is very responsive to the variation of pH value, there are some researches show (Jetten, M.S.M., Wagner, M., Fuerst, J., van Loosdrecht, M., Kuenen, G., Strous, M., 2001.Microbiology and application of theanaerobic ammonium oxidation (anammox) process.Curr.Opin.Biotech.12,283-288), the speed of growth of Nitrosomas is worked as the pH value and reach maximum near 8.0, and the nitrated pH of the requirement value of nitrite type must be controlled between 7.4 ~ 8.3.The pH value is controlled at 7.0 ± 0.2 among the present invention, and Nitrosomas is subjected to strongly inhibited, and most ammonia-nitrogen can not be oxidized to nitric nitrogen in the sewage, provides competent nitrogenous source for the follow-up aerobic excess of microorganism absorbs.
Owing to exist the long period to leave standstill the phase (9h-10h) between two aerobic sections, produced the stage of a nutrition poorness, be that microorganism is in " hunger " state, when the external world has nutraceutical matrix such as C, N, P (aerobic section), microorganism can excessively absorb these nutrition fast, temporarily they are absorbed, put aside in cell, in ensuing extraneous shortage nutraceutical matrix, slowly utilize again, get rid of rich nitrogen mud by each cycle and reach the denitrogenation purpose.Therefore, operation method of the present invention should control well the pH value with the reaction time of repose.
As known from the above, the present invention is a kind of single-stage aerobic biological denitrification operation method of sequencing batch reactor, it utilizes microorganism excess absorbed nitrogen element, adopt SBR single-stage aerobic process to realize biological denitrificaion, regulate the growth that the pH value suppresses nitrifier, by the synchronous removal of oxidation step realization organism and nitrogen, compare the advantage that following aspect is arranged with traditional biological denitrification process:
(1) ammonia nitrogen do not need nitrated for nitric nitrogen, thereby reduced the demand of oxygen, reduced energy consumption;
(2) entire reaction course does not need the backflow of mud and nitrification liquid, has reduced power consumption;
(3) need not add organic carbon source and alkali, reduce running cost;
(4) operational path is simplified greatly, does not need to be provided with complicated aerobic section anoxic section alternately, has reduced floor space, has reduced the capital construction cost.
Description of drawings
Fig. 1 is a kind of example structure synoptic diagram of the sequencing batch reactor (sbr reactor device) that adopts of the present invention.In the drawings:
The 1-water inlet pipe, the 2-inlet valve, the 3-flowing water Valve,
The 4-rising pipe, 5-spoil disposal valve, the 6-shore pipe,
The 7-sequencing batch reactor, the 8-aeration head, the 9-under meter,
The 10-blast main, the 11-air compressor.
Embodiment
The example that is treated to simcity sanitary sewage and real cell waste water is illustrated the present invention below.
Embodiment 1: operation method of the present invention adopts the common sequencing batch reactor 7 (referring to Fig. 1) that inlet valve 2, flowing water Valve 3, spoil disposal valve 5 are housed, and this reactor bottom is equipped with the aeration head 8 that connects with air compressor 11 through under meter 9; Carry out as follows:
A. open inlet valve 2, sewage enters sbr reactor device 7 from water inlet pipe 1, after sewage to be advanced finishes, closes inlet valve 2;
B. open air compressor machine 11, sewage in the reactor is directly carried out aerobic aeration, regulate under meter 9, sbr reactor device 7 interior dissolved oxygen concentrations (DO) were about 6mgL when aeration was begun
-1, use NaHCO
3Regulate the pH value with 0.5M HCL, make that the pH value is controlled at 7 in the reaction process, the aerobic aeration time is 4h;
C. close air compressor 11, finish aeration; Precipitation 0.5h is to realize mud-water separation;
D. open water discharging valve 3, making the interior hydraulic detention time of reactor is 12.5h; Draining is closed water discharging valve 3 after finishing;
E. open spoil disposal valve 5 and carry out spoil disposal,, make that activated sludge concentration is 4000mgL in the reactor to stablize sludge concentration, control mud age
-1, mud mud age is 10d;
F. after spoil disposal finished, reactor left standstill 9.5h.
By above-mentioned operation method treatment of simulated city domestic sewage.Carbon source mainly adopts glucose, and ammonia nitrogen mainly adopts ammonium chloride, and water inlet COD is 300-350mgL
-1, TN (total nitrogen) is 30-40mgL
-1The result is as follows after the steady running: water outlet COD is 26-54mgL
-1, ammonia nitrogen is 0-5mgL
-1, COD, TN clearance reach 85.5 ± 5.7%, 87.4 ± 5.2% respectively.
Embodiment 2: press the foregoing description 1 operation method and handle real cell waste water.Water inlet COD is 162-298mgL
-1, ammonia nitrogen is 24.8-36.4mgL
-1The result is as follows after the steady running: water outlet COD is 34-86mgL
-1, TN is 0-7.4mgL
-1, COD, TN clearance reach 73.4 ± 6.4%, 79.4 ± 5.8% respectively.
Claims (1)
1. the single-stage aerobic biological denitrification operation method of a sequencing batch reactor, the common sequencing batch reactor (7) of inlet valve (2), flowing water Valve (3), spoil disposal valve (5) is equipped with in employing, this reactor bottom is equipped with the aeration head (8) that connects through the same air compressor of under meter (9) (11), it is characterized in that, carry out as follows:
A. open inlet valve (2), sewage enters sequencing batch reactor (7) from water inlet pipe (1), after sewage to be advanced finishes, closes inlet valve (2);
B. open air compressor (11), sewage in the reactor is directly carried out aerobic aeration, regulate under meter (9), the interior dissolved oxygen concentration of sequencing batch reactor when aeration is begun (7) (DO) is 5.8mgL
-1-6.2mgL
-1, use NaHCO
3Regulate the pH value with 0.5M HCL, make that the pH value is controlled at 6.8-7.2 in the reaction process, the aerobic aeration time is 3.8h-4.2h;
C. close air compressor (11), finish aeration; Precipitation 0.4h-0.6h is to realize mud-water separation;
D. open flowing water Valve (3), making the interior hydraulic detention time of reactor is 11h-13h; Draining is closed flowing water Valve (3) after finishing;
E. open spoil disposal valve (5) and carry out spoil disposal,, make that activated sludge concentration is 3800mgL in the reactor to stablize sludge concentration, control mud age
-1-4200mgL
-1, mud mud age is 8d-12d;
F. after spoil disposal finished, reactor left standstill 9h-10h.
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| CN2008100314520A CN101289247B (en) | 2008-06-06 | 2008-06-06 | Single-stage aerobic biological denitrification operation method of sequencing batch reactor |
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| CN101289247B true CN101289247B (en) | 2010-06-23 |
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| US9085478B2 (en) * | 2010-11-16 | 2015-07-21 | Siemens Energy, Inc. | Distributed aeration system and control architecture |
| CN102417237B (en) * | 2011-10-14 | 2013-05-01 | 湖南大学 | Rotary SBR bioreactor used for treating waste water containing ammonia-N and waste water treating method thereof |
| CN102774959B (en) * | 2012-08-13 | 2013-08-14 | 同济大学 | Wastewater treatment device and method for realizing biological phosphorous removal by using sequencing batch activated sludge process |
| CN103172170A (en) * | 2013-03-08 | 2013-06-26 | 北京工业大学 | Sequencing batch completely autotrophic ammonia removal technology running method |
| CN107129046B (en) * | 2017-07-05 | 2020-04-24 | 扬州大学 | A2Improved process for water treatment of/O-BCO |
| CN110240262A (en) * | 2019-06-05 | 2019-09-17 | 华东理工大学 | A method of not only retaining ammonia nitrogen in livestock and poultry cultivation biological wastewater treatment process but also had removed antibiotic |
| CN110255812B (en) * | 2019-06-05 | 2021-12-21 | 华东理工大学 | Biochemical and advanced oxidation combined method for retaining ammonia nitrogen and removing antibiotics in livestock and poultry breeding sewage treatment process |
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Assignee: HUNAN YONKER WATER CO., LTD. Assignor: Hunan University Contract record no.: 2011430000045 Denomination of invention: Single-stage aerobic biological denitrification operation method of sequencing batch reactor Granted publication date: 20100623 License type: Exclusive License Open date: 20081022 Record date: 20110418 |
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