CN102417268A - Method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment - Google Patents
Method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment Download PDFInfo
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- CN102417268A CN102417268A CN2010102987683A CN201010298768A CN102417268A CN 102417268 A CN102417268 A CN 102417268A CN 2010102987683 A CN2010102987683 A CN 2010102987683A CN 201010298768 A CN201010298768 A CN 201010298768A CN 102417268 A CN102417268 A CN 102417268A
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Abstract
The invention belongs to the technical field of biological treatment of wastewater, and relates to a method for efficiently denitriding aerobic granular sludge by combining stepwise water feeding with alternate anaerobic and aerobic treatment. In the method for efficiently denitriding aerobic granular sludge, the reaction process is designed into multiple stages on the basis of a sequencing batch reactor, and an anaerobic-aerobic or low-oxygen alternate running mode is adopted at every stage; a water feeding mode for feeding water according to different proportions at multiple sections is designed according to the quality of fed water, and a water feeding point is set at the early anaerobic stage or the entire anaerobic stage of every stage in the reaction process. The method for efficiently denitriding aerobic granular sludge disclosed by the invention has the advantages of high denitriding efficiency, stable granular sludge performance and no need of adding any running cost, and is widely applied in the field of wastewater treatment.
Description
Technical field
The invention belongs to the biological wastewater treatment technology field; Relate to a kind of aerobic particle mud denitrifying method, be specifically related to the aerobic particle mud efficient denitrification method that the anaerobic-aerobic of a kind of simple in structure, cost is low, processing efficiency is high substep water inlet-alternately combines.
Background technology
The biological denitrificaion of prior art is normally realized through the nitrification and denitrification process.Under aerobic condition, nitrifier is oxidized to nitrite anions and nitrate radical (nitrifying process) with ammonia nitrogen; Under anoxia condition, denitrifying bacteria is nitrogen (denitrification process) with nitrite anions and reducing nitrate radical, thereby nitrogen is innoxious in the realization waste water.
Granule sludge is the efficient biological treatment method that grows up over past ten years.With respect to the traditional active sludge treatment process that is applied to Waste Water Treatment at present; Granule sludge becomes one of method of wastewater treatment of at present tool development prospect with the premium properties that its settling property is good, impact resistance is high, biological concentration is high and suitability is wide.Research shows that in granule sludge denitrogenation processing system, granule sludge adheres to carrier for the slow growth nitrifier provides, and makes that nitrifier quantity increases greatly in the system, so nitrifying process is often than being easier to Rapid Realization.And because all there is the lower problem of C/N ratio in present most of nitrogenous effluent, make that electron donor is not enough in the denitrification process, so denitrification process often becomes the rate-limiting step of granule sludge denitrification system.
At present, many efficient of all being devoted to improve denitrification process about granule sludge denitrogenation research.Wherein extra carbon source add with nitration denitrification simultaneously be one of many strategies of research at present.Have research to show, aerobic and anoxic process combines and in the extra carbon source that adds of anoxic section, can improve system's nitric efficiency.But the adding of extra carbon source makes that system operation is loaded down with trivial details, running cost is high, and the Technological Economy suitability reduces greatly.And utilize the inner aerobic and anaerobic zone of aerobic particle mud to realize the method for synchronous nitration and denitrification, though can save adding of extra carbon source, LDO has caused nitration reaction speed low poor with system stability.In addition, the uncontrollability of granule sludge particle diameter and density has also influenced promoting the use of of this method greatly.Therefore, how under the prerequisite that does not increase Financial cost, to improve the nitric efficiency of system, become the key that improves the granule sludge nitric efficiency.
Summary of the invention
The objective of the invention is to overcome the prior art defective; A kind of aerobic particle mud denitrifying method is provided, relates in particular to the aerobic particle mud efficient denitrification method that the anaerobic-aerobic of a kind of simple in structure, cost is low, processing efficiency is high substep water inlet-alternately combines.This method can be made good use of and support nitrogen removal efficiency in the granule sludge raising waste water.
Usually the wastewater treatment of granule sludge mainly is at sequencing batch reactor (Sequencing Batch Reactor; SBR) carry out in; Four operating process of water inlet, reaction, deposition, draining that it comprises traditional SBR exist complex operation, system stability is poor, nitric efficiency is low defective.The present invention is primarily aimed at into water and reaction process to granule sludge nitric efficiency research experiment under different denitrogenation operation strategies, and its reaction process is made as a plurality of stages, and each stage is adopted the alternate run mode of aerobic or hypoxemia after the first anaerobism; Water intake mode is designed to the multi-section water-inlet by different ratios according to influent quality, and water entry is arranged at the anaerobic phase early stage or the whole anaerobic phase in each stage in the reaction process, and a kind of high-efficient granule mud denitrifying method is provided.
Particularly, substep water inlet of the present invention-replace the aerobic particle mud efficient denitrification method that anaerobic-aerobic combines is characterized in that it comprises step:
A. the selected reactor drum that does not limit shape;
B. this reactor drum adopts the sequence batch (working method, and each operational cycle comprises into water, reaction, sludge settling and four steps of draining;
C. in each operational cycle, water inlet is carried out several times, and number of times is unrestricted;
D. during intaking with the water inlet after in a short time, reactor drum is kept anaerobic state;
In the anaerobic phase, mud and water can be kept stationary state in the reactor drum, also can carry out the circulation of water or strengthen admixture in the reactor drum through churned mechanically mode;
E. carrying out oxygen supply behind the anaerobic stages handles;
F. step D-E can repeatedly repeat according to the water quality of actual waste water;
G. the aerobic stage after the last water inlet, the control dissolved oxygen is about 2mg/L.
In conjunction with shown in Figure 1, further describe the water inlet step among the present invention, wherein: be in anaerobic stages after 1 section water inlet, the back gets into aerobic stage; Be in anaerobic stages once more after 2 sections water inlets, the back gets into aerobic stage; Be in anaerobic stages once more after 3 sections water inlets, get into the hypoxemia stage then (LDO stage).
Among the present invention, the flooding time in described each stage can be a section in each anaerobic phase, also can be whole anaerobic phase.
Mud and water can be admixtures in the described anaerobic phase, also can be stationary states; The realization of admixture does not receive the influence of hybrid mode.
Among the present invention, the aerobic stage of final stage, dissolved oxygen can be controlled also and can not control.In one embodiment of the present of invention, the aerobic stage after the last water inlet, the control dissolved oxygen is about 2mg/L.
Experimental result shows that substep water inlet of the present invention-replace the aerobic particle mud efficient denitrification method that anaerobic-aerobic combines can make full use of the coexistence of aerobic granular sludge stage and anaerobic stages, farthest removes remaining nitrogen; Aerobic particle mud efficient denitrification method nitric efficiency of the present invention is high, the granule sludge stable performance, and nothing adds running cost, is widely used in field of waste water treatment.
Beneficial effect of the present invention is that the advantage of aerobic particle mud efficient denitrification method of the present invention has:
(1) operation scheme of anaerobic-aerobic alternate run has obviously improved the stability of granule sludge system;
(2) operation scheme of substep water inlet has reduced that COD concentration has improved the rate of nitrification of system greatly to the competitiveness consumption of system dissolves oxygen in the aerobic section water inlet; And, obviously improved the denitrification rate of system owing to provide the nitrate radical that the carbon source of bringing in every section water inlet and preceding aerobic section produce the time;
(3) the LDO stage then makes full use of the coexistence of aerobic granular sludge district and anaerobic zone in the reaction process, farthest carries out the removal of residual nitrogen in the system;
(4) the optimization utilization of system's water-inlet carbon source and the raising of rate of nitrification make system applicable to the processing of the wider waste water of C/N ratio scope, have widened the range of application of system.
For the ease of understanding, through accompanying drawing and specific embodiment aerobic particle mud efficient denitrification method of the present invention is carried out detailed description below.What need particularly point out is, specific embodiment and accompanying drawing only are in order to explain that obviously those skilled in the art can explain according to this paper, and the present invention is carried out various corrections or change, and these corrections and changing also will be included within the scope of the invention.
Description of drawings
Fig. 1 is the operational flowchart of the inventive method.
Fig. 2 is the inventive method process treatment process figure.
Fig. 3 is the inventive method long-time running denitrification effect figure.
Embodiment
So that the substep water inlet-alternately anerobic aerobic granular mud denitrification system is handled carbon nitrogen (COD: NH
4 +-N) than the synthetic wastewater that is 10.
Adopt aerobic particle mud efficient denitrification method of the present invention to carry out wastewater treatment, the whole service cycle is 6 hours; Wherein, three sections anaerobic stages are set at 30 minutes respectively; First and second section aerobic stage is set at 60 minutes respectively; The hypoxemia stage (LDO stage) is set at 143 minutes, and precipitate phase is set at 2 minutes, and bleeding stage is set at 5 minutes.
After adopting the aerobic grain denitrogenation processing, the nitrogen removal efficiency is 93%; Wherein, said particulate median size is 1.5mm.
Embodiment 2
So that the substep water inlet-alternately anerobic aerobic granular mud denitrification system is handled carbon nitrogen (COD: NH
4 +-N) than the synthetic wastewater that is 5.
The aerobic particle mud efficient denitrification method of the present invention that adopts is carried out wastewater treatment, and the whole service cycle is 6 hours; Wherein, three sections anaerobic stages are set at 30 minutes respectively; First and second section aerobic stage is set at 70 minutes respectively and 50 minutes; The hypoxemia stage (LDO stage) is set at 143 minutes, and precipitate phase is set at 2 minutes, and bleeding stage is set at 5 minutes.
After adopting denitrification system to handle, the nitrogen removal efficiency is 96%; Wherein, said particulate median size is 1.3mm.
In the present embodiment in the operational cycle typical nitrogen to remove situation as shown in Figure 2, to remove situation as shown in Figure 3 for nitrogen in the medium-term and long-term operating period.
The foregoing description is the result show, aerobic particle mud efficient denitrification method of the present invention makes full use of the coexistence of aerobic granular sludge stage and anaerobic stages, farthest removes remaining nitrogen; Aerobic particle mud efficient denitrification method nitric efficiency of the present invention is high, the granule sludge stable performance, and nothing adds running cost, is widely used in field of waste water treatment.。
Claims (10)
1. the aerobic particle mud efficient denitrification method that the anaerobic-aerobic of a substep water inlet-alternately combines; Comprise into water, reaction, deposition, drain operation process; It is characterized in that; In described water inlet and the reaction process, water intake mode is made as the multi-section water-inlet by different ratios according to influent quality, and water entry is located at the anaerobic phase early stage or the whole anaerobic phase in each stage in the reaction process; Described reaction process is made as a plurality of stages, and each stage is adopted the alternate run mode of aerobic or hypoxemia after the first anaerobism.
2. by the described aerobic particle mud efficient denitrification of claim 1 method, it is characterized in that it comprises step:
A. the selected reactor drum that does not limit shape;
B. this reactor drum adopts the sequence batch (working method, and each operational cycle comprises into water, reaction, sludge settling and four steps of draining;
C. in each operational cycle, water inlet is carried out several times, and number of times is unrestricted;
D. during intaking with the water inlet after in a short time, reactor drum is kept anaerobic state;
E. carrying out oxygen supply behind the anaerobic stages handles;
F. step D-E can repeatedly repeat according to the water quality of actual waste water;
G. the aerobic stage after the last water inlet, the control dissolved oxygen concentration.
3. by the described aerobic particle mud efficient denitrification of claim 1 method, it is characterized in that, in the described D step,
Reactor drum is kept in the anaerobic phase of anaerobic state, and mud and water are kept stationary state in the reactor drum, or carry out the circulation of water or strengthen admixture in the reactor drum through churned mechanically mode.
4. by the described aerobic particle mud efficient denitrification of claim 1 method, it is characterized in that in the described G step, the control dissolved oxygen concentration is about 2mg/L.
5. by the described aerobic particle mud efficient denitrification of claim 2 method, it is characterized in that, described water inlet step, wherein: be in anaerobic stages after 1 section water inlet, the back gets into aerobic stage; Be in anaerobic stages once more after 2 sections water inlets, the back gets into aerobic stage; Be in anaerobic stages once more after 3 sections water inlets, get into the hypoxemia stage then.
6. by the described aerobic particle mud efficient denitrification of claim 3 method, it is characterized in that the flooding time in described each stage is a section in each anaerobic phase, or whole anaerobic phase.
7. by the described aerobic particle mud efficient denitrification of claim method, it is characterized in that described three anaerobic stages all are set at 30 minutes.
8. by the described aerobic particle mud efficient denitrification of claim 2 method, it is characterized in that described first and second section aerobic stage all is set at 60 minutes.
9. by the described aerobic particle mud efficient denitrification of claim 2 method, it is characterized in that the described hypoxemia stage is set at 143 minutes.
10. by the described aerobic particle mud efficient denitrification of claim 2 method, it is characterized in that its time of accomplishing this method is 6 hours.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204587A (en) * | 2013-04-18 | 2013-07-17 | 天津清华德人环境工程有限公司 | Anaerobic-aerobic alternative type granule sludge treatment sewage device and method |
| CN103570183A (en) * | 2012-07-25 | 2014-02-12 | 上海市政工程设计研究总院（集团）有限公司 | Nitrogen and phosphorus removal technology having functions of preventing and controlling biological floating foam |
| CN106904795A (en) * | 2017-03-31 | 2017-06-30 | 沈阳环境科学研究院 | A kind of milk cattle cultivating waste water treatment process |
| CN109912029A (en) * | 2019-03-19 | 2019-06-21 | 北京工业大学 | A kind of gravity flow Internal-circulationaerobic aerobic granule sludge continuous flow reactor |
| CN110330180A (en) * | 2019-07-17 | 2019-10-15 | 大连海洋大学 | A kind of system and method for mainstream short-cut nitrification and denitrification/Anammox |
| CN112479379A (en) * | 2020-12-11 | 2021-03-12 | 江西理工大学 | Ionic type rare earth mine high ammonia nitrogen wastewater aerobic granular sludge coupling denitrification method |
| CN114162970A (en) * | 2021-12-10 | 2022-03-11 | 上海问鼎环保科技有限公司 | Efficient denitrification method for aerobic granular sludge |
| CN115367880A (en) * | 2022-09-27 | 2022-11-22 | 北控水务(中国)投资有限公司 | Sewage treatment system and method based on aerobic granular sludge |
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| CN101428907A (en) * | 2008-12-18 | 2009-05-13 | 浙江大学 | Method for cultivation of particle sewage sludge in anaerobic/oxygen lack-aerobic sequencing batch reactor |
| CN101573302A (en) * | 2006-10-16 | 2009-11-04 | 环境生物科技Crc有限公司 | Wastewater treatment |
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Patent Citations (2)
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| CN101573302A (en) * | 2006-10-16 | 2009-11-04 | 环境生物科技Crc有限公司 | Wastewater treatment |
| CN101428907A (en) * | 2008-12-18 | 2009-05-13 | 浙江大学 | Method for cultivation of particle sewage sludge in anaerobic/oxygen lack-aerobic sequencing batch reactor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570183A (en) * | 2012-07-25 | 2014-02-12 | 上海市政工程设计研究总院（集团）有限公司 | Nitrogen and phosphorus removal technology having functions of preventing and controlling biological floating foam |
| CN103204587A (en) * | 2013-04-18 | 2013-07-17 | 天津清华德人环境工程有限公司 | Anaerobic-aerobic alternative type granule sludge treatment sewage device and method |
| CN106904795A (en) * | 2017-03-31 | 2017-06-30 | 沈阳环境科学研究院 | A kind of milk cattle cultivating waste water treatment process |
| CN109912029A (en) * | 2019-03-19 | 2019-06-21 | 北京工业大学 | A kind of gravity flow Internal-circulationaerobic aerobic granule sludge continuous flow reactor |
| CN110330180A (en) * | 2019-07-17 | 2019-10-15 | 大连海洋大学 | A kind of system and method for mainstream short-cut nitrification and denitrification/Anammox |
| CN110330180B (en) * | 2019-07-17 | 2022-03-01 | 大连海洋大学 | Mainstream shortcut nitrification-denitrification/anaerobic ammonia oxidation system and method |
| CN112479379A (en) * | 2020-12-11 | 2021-03-12 | 江西理工大学 | Ionic type rare earth mine high ammonia nitrogen wastewater aerobic granular sludge coupling denitrification method |
| CN114162970A (en) * | 2021-12-10 | 2022-03-11 | 上海问鼎环保科技有限公司 | Efficient denitrification method for aerobic granular sludge |
| CN114162970B (en) * | 2021-12-10 | 2023-04-28 | 上海问鼎环保科技有限公司 | Efficient denitrification method for aerobic granular sludge |
| CN115367880A (en) * | 2022-09-27 | 2022-11-22 | 北控水务(中国)投资有限公司 | Sewage treatment system and method based on aerobic granular sludge |
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Application publication date: 20120418 |