CN103112947A - Method suitable for nitrosation stable operation of low-temperature and low-ammonia nitrogen SBR (sequencing batch reactor) - Google Patents
Method suitable for nitrosation stable operation of low-temperature and low-ammonia nitrogen SBR (sequencing batch reactor) Download PDFInfo
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- CN103112947A CN103112947A CN2013100738232A CN201310073823A CN103112947A CN 103112947 A CN103112947 A CN 103112947A CN 2013100738232 A CN2013100738232 A CN 2013100738232A CN 201310073823 A CN201310073823 A CN 201310073823A CN 103112947 A CN103112947 A CN 103112947A
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Abstract
The invention discloses a method suitable for nitrosation stable operation of a low-temperature and low-ammonia nitrogen SBR (sequencing batch reactor), and belongs to the fields of municipal sewage treatment and reclamation. Stable operation can be achieved under a common water intake condition of requiring high temperature and high ammonia nitrogen in achievement of nitrosation; the operation temperature is low temperature of 11-16 DEG C; the water intake ammonia nitrogen concentration is 50+/-5 mg/L; dissolved oxygen is maintained at 0.5-2.0mg/L by controlling the aeration rate; the ammonia oxidation rate is maintained at 85-99% by controlling the aeration time; sodium bicarbonate is fed to control the pH of inlet water at 7.65-8.20; and the sub-efficiency is maintained over 90% at all times after 90 cycles of operation in 45 days. Stable operation of SBR nitrosation under the low-temperature and low-ammonia nitrogen conditions is successfully achieved by the invention.
Description
Technical field
The invention belongs to municipal sewage treatment and resource utilization field.Be specifically related to a kind of method that is applicable to the low ammonia nitrogen SBR nitrosification steady running of low temperature.
Background technology
The water resources of China is very poor, and the water pollution problems that is on the rise has had influence on the mankind's life, and wherein nitrate pollution also becomes the focus that people pay close attention to gradually.
Traditional biological denitrification method is (as A/O method, A
2O methods etc.) exist the problem that hydraulic detention time is long, the capital construction working cost is high, therefore many countries have all strengthened the research to Biological Nitrogen Removal Processe.In recent years, Chinese scholars has been carried out a large amount of research to the bio-denitrifying sewage technology, and some novel denitride technologies have obtained developing rapidly, as while nitration denitrification technology, short-cut nitrification and denitrification technology, Anammox technology etc.The advantages such as these technology have low oxygen-consumption, reduce additional carbon, working cost is low.In many denitrogenation new technologies, realize that stable nitrosification is the committed step of various technology.Nitration reaction is by ammonia oxidation bacteria (AOB) and NOB (NOB) acting in conjunction and complete, and AOB is oxidized to inferior nitrogen with ammonia nitrogen, and NOB further changes into nitre nitrogen with inferior nitrogen.Because the growth characteristics of two kinds of bacterial classifications there are differences and the condition of suitable existence is also different, therefore can reach enrichment AOB by controlling reaction conditions, eluriate the purpose of NOB.
Nitrosification at present is multiplex in the trade effluent of lignin-sludge Digestive system, percolate and high ammonia nitrogen, and major part also needs to carry out under the high temperature of 30～40 ℃.And the research of the low ammonia nitrogen city domestic sewage Stable short-cut nitrosification of normal temperature rarely has report, this is due under low ammonia nitrogen concentration, has also a series of difficulties such as veryer long of complete selection process that rapid growth type ammonia oxidizing bacteria (AOB) is difficult to enrichment, NOB (NOB).Studies show that intensification can effectively improve the growth velocity of AOB and NOB, so high temperature is regarded as realizing and keeping the essential condition of stablizing short distance nitration.Sanitary sewage is heated to comparatively high temps need to consumes a considerable amount of energy, for large-scale wastewater treatment plant, the concrete difficulty of implementing and the energy consumption of increase are not all allowed to despise.Particularly maintaining 11-16 ℃ at North City winter temperature sewage, is to hinder the large bottleneck that Short-Cut Nitrification Process is realized through engineering approaches.Therefore seeking under the low ammonia nitrogen condition of low temperature nitrosifying steady running, to be applied to Practical Project for Short-Cut Nitrification Process significant.
Summary of the invention
The object of the present invention is to provide a kind of method that is applicable to the low ammonia nitrogen SBR nitrosification steady running of low temperature.It is characterized in that:
Nitrosification mud is moved in the sbr reactor device, and operating temperature is under 11-16 ℃, and influent ammonium concentration is 50 ± 5mg/L; Control aeration rate and make dissolved oxygen maintain 0.5-2.0mg/L, make ammonia oxidation rate keep 85%-99% by controlling aeration time, add sodium bicarbonate and control water inlet pH at 7.65-8.20; Keep this condition operation, calculate nitrite and the nitrite of accumulation and the ratio of nitrate sum that water outlet nitrosification rate is namely reacted accumulation; The nitrous rate maintains more than 90% always, has realized that low temperature hangs down the nitrosifying steady running of ammonia nitrogen SBR.
A kind of method that is applicable to the low ammonia nitrogen SBR nitrosification steady running of low temperature provided by the present invention.Be under the condition of 50 ± 5mg/L at influent ammonium concentration, higher dissolved oxygen can make NOB grow under suitable condition.Adopt lower dissolved oxygen can make again oxidation rate very slow under low temperature 11-16 ℃, reduced treatment effect.The present invention adopts a moderate aeration rate, and dissolved oxygen is controlled at 0.5-2.0mg/L, has coordinated above two kinds of problems.And control water inlet pH and rise in value in the more suitable scope of AOB at 7.65-8.20 by adding sodium bicarbonate.Keep ammonia oxidation rate 85%-99% by the control aeration time and make water outlet efficient high, and guarantee its steady running.
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 reactor waste water by regulating aeration rate.Reactor arranges simple automatic control device, realizes automatic feeding water, reaction, precipitation, drainage flow path.
Step 2: change operational conditions
Move in the sbr reactor device starting successful nitrosification mud, operating temperature is under low temperature 11-16 ℃, and influent ammonium concentration is 50 ± 5mg/L.Control aeration rate and make dissolved oxygen maintain 0.5-2.0mg/L, add sodium bicarbonate and control water inlet pH at 7.65-8.20.Continuous aeration operation 12 hours, this step are intended to allow seed sludge shake down to be not counted in cycle life.After adapting to end, still control aeration rate and make dissolved oxygen maintain 0.5-2.0mg/L, every the 30min sampling once, serial sampling is measured three nitrogen concentrations until ammonia nitrogen all is exhausted, and determines that with this aeration time and ammonia nitrogen consume relation.
Step 3: after determining the reaction times, continue to adopt the aeration strategy of step 2, control aeration time, with the 85%-99% of the initial ammonia nitrogen concentration of ammonia nitrogen oxidation.The ammonia nitrogen of monitoring Inlet and outlet water every day, inferior nitrogen, nitre nitrogen, calculating nitrous rate, i.e. water outlet nitrite nitrogen/(water outlet nitrite nitrogen+water outlet nitrate nitrogen).Keep 45 days 90 cycle nitrous rates of this tactful continuous service to maintain more than 90% always.Realized that low temperature hangs down the nitrosifying steady running of ammonia nitrogen SBR.
Compare with traditional method, advantage of the present invention is:
The first, the steady running control strategy under a low ammonia nitrogen condition of the reliable low temperature of cover is provided, solve nitrosification and be applied to the difficult problem that low temperature hangs down ammonia nitrogen.
The second, control device is simply effective, convenient operation.
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 steady running design sketch of the present invention.
Embodiment
Test is take simulated sewage as basic water, and concrete water quality is as follows:
NH
4 +-N=50 ± 5mg/L, pH=7.65 ~ 8.20, temperature is 11-15.5 ℃.
Before recovering, nitrosification mud operating performance is referring to Fig. 1
The present invention in operating temperature at low temperature 11-15.5 ℃, influent ammonium concentration is under 50 ± 5mg/L condition, make dissolved oxygen maintain 0.5-2.0mg/L by controlling aeration rate, controlling aeration time makes ammonia oxidation rate keep 85%-99%, add sodium bicarbonate and control water inlet pH at 7.65-8.20, be under the condition of 50 ± 5mg/L at influent ammonium concentration, higher dissolved oxygen can make NOB grow under suitable condition.Adopt lower dissolved oxygen can make again oxidation rate very slow under low temperature 11-16 ℃, reduced treatment effect.The present invention adopts a moderate aeration rate, and dissolved oxygen is controlled at 0.5-2.0mg/L, has coordinated above two kinds of problems.And control water inlet pH and rise in value in the more suitable scope of AOB at 7.65-8.20 by adding sodium bicarbonate.Keeping ammonia oxidation rate 85%-99% by the control aeration time makes water outlet efficient high.As can be seen from the figure, through the operation in 45 day 90 cycle, the nitrous rate maintains more than 90% always, and ammonia oxidation rate slightly fluctuates between 85%-99%, and outlet effect is good.Successfully realized the nitrosifying steady running of SBR under the low ammonia nitrogen condition of low temperature.
Claims (1)
1. one kind is applicable to the method that low temperature hangs down ammonia nitrogen SBR nitrosification steady running, it is characterized in that:
Nitrosification mud is moved in the sbr reactor device, and operating temperature is under 11-16 ℃, and influent ammonium concentration is 50 ± 5mg/L; Control aeration rate and make dissolved oxygen maintain 0.5-2.0mg/L, make ammonia oxidation rate keep 85%-99% by controlling aeration time, add sodium bicarbonate and control water inlet pH at 7.65-8.20; Keep this condition operation, calculate nitrite and the nitrite of accumulation and the ratio of nitrate sum that water outlet nitrosification rate is namely reacted accumulation; The nitrous rate maintains more than 90% always, has realized that low temperature hangs down the nitrosifying steady running of ammonia nitrogen SBR.
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Cited By (5)
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|---|---|---|---|---|
| CN107253761A (en) * | 2017-07-31 | 2017-10-17 | 山东大学 | A kind of Anammox based on inactivated sludge quickly strengthens startup method |
| CN110156152A (en) * | 2019-01-21 | 2019-08-23 | 广东工业大学 | A kind of quick short distance nitration starting method and its application |
| CN110642371A (en) * | 2019-09-09 | 2020-01-03 | 西安建筑科技大学 | Method for realizing low-temperature short-cut nitrification of nitrogen-containing wastewater |
| WO2020082398A1 (en) * | 2018-10-25 | 2020-04-30 | 华南理工大学 | Method for achieving stable nitrosation of low-concentration ammonia-nitrogen wastewater |
| CN115057590A (en) * | 2022-07-08 | 2022-09-16 | 华南理工大学 | Method for realizing stable nitrosation of medium-low concentration ammonia nitrogen wastewater based on zeolite biological aerated filter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107253761A (en) * | 2017-07-31 | 2017-10-17 | 山东大学 | A kind of Anammox based on inactivated sludge quickly strengthens startup method |
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| CN110156152A (en) * | 2019-01-21 | 2019-08-23 | 广东工业大学 | A kind of quick short distance nitration starting method and its application |
| CN110642371A (en) * | 2019-09-09 | 2020-01-03 | 西安建筑科技大学 | Method for realizing low-temperature short-cut nitrification of nitrogen-containing wastewater |
| CN110642371B (en) * | 2019-09-09 | 2022-03-22 | 西安建筑科技大学 | Method for realizing low-temperature short-cut nitrification of nitrogen-containing wastewater |
| CN115057590A (en) * | 2022-07-08 | 2022-09-16 | 华南理工大学 | Method for realizing stable nitrosation of medium-low concentration ammonia nitrogen wastewater based on zeolite biological aerated filter |
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Application publication date: 20130522 |