CN105621613A - A<2>/O nitrogen and phosphorus removal technology - Google Patents
A<2>/O nitrogen and phosphorus removal technology Download PDFInfo
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- CN105621613A CN105621613A CN201610189351.0A CN201610189351A CN105621613A CN 105621613 A CN105621613 A CN 105621613A CN 201610189351 A CN201610189351 A CN 201610189351A CN 105621613 A CN105621613 A CN 105621613A
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- phosphorus removal
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention belongs to the technical field of water treatment and particularly relates to an A<2>/O nitrogen and phosphorus removal technology. In the A<2>/O nitrogen and phosphorus removal technology, return flow at an aerobic section enters a low-speed centrifuge to be subjected to centrifugal separation, settled sludge flows back to an anaerobic section, and the supernatant flows back to an anoxic section. Only the low-speed centrifuge is additionally arranged, and denitrogenation and phosphorus removal are better regionalized and avoid mutual interference, so that the shortcoming of low nitrogen and phosphorus removal effect caused by the reason that that in a traditional A<2>/O technology, the denitrogenation effect is influenced by the reflux ratio of a mixed liquor and the phosphorus removal effect is influenced by DO and nitric oxygen mixed with return sludge is overcome. The A<2>/O nitrogen and phosphorus removal technology is high in efficiency, low in energy consumption and simple to operate, does not increase the civil engineering expenditure, and can effectively guarantee the stability of an anaerobic pool and improve the effect of the traditional A<2>/O nitrogen and phosphorus removal technology.
Description
Technical field
The invention belongs to water-treatment technology field, in particular to water treatment A2/ O denitrification dephosphorization technique.
Background technology
A2/O is the simultaneous phosphorus and nitrogen removal technique developing out the seventies in 20th century on anaerobism anoxic process, tradition A2/O method and anaerobism �� anoxic �� aerobic activated sludge process. Sewage, in the process flowing through three different function divisions, under different microorganisms bacterium group acts on, makes the organism in sewage, nitrogen and phosphorus be removed. First the polyP bacteria entering anaerobic pond preferentially utilizes carbon source material in sewage (BOD), become dominant bacteria, for dephosphorization creates condition, then sewage enters anoxic pond, denitrifying bacteria utilizes other carbon source that can utilize that the nitric nitrogen being back to anoxic pond is reduced into nitrogen and is drained in air, reaches the object of denitrogenation. But denitrification effect is by the impact of return current ratio of the mixed liquid size, phosphor-removing effect then carries DO and the impact of nitric acid state oxygen secretly by returned sluge, and thus denitrogenation dephosphorizing efficiency is not high.
In order to overcome the shortcoming of tradition A2/O technique, improvement A2/O technique set up anaerobic/anoxic equalizing tank before anaerobic pond, water inlet from the returned sluge about 10% of second pond enters equalizing tank, the residence time 20��30min, the nitric nitrogen that microorganism utilizes in about 10% water inlet in organic matter removal returned sluge, eliminate nitric nitrogen to the disadvantageous effect of anaerobic pond, thus ensure the stability of anaerobic pond. Although improvement A2/O technique solves anaerobism section in tradition A2/O technique and refluxes nitrate to the impact releasing phosphorus, but increases equalizing tank, floor space and civil engineering costs need corresponding increase.
Summary of the invention
It is an object of the invention to provide a kind of A2/ O denitrification dephosphorization technique, this process efficiency height, power consumption is few, does not increase civil engineering costs, simple to operate, can effectively ensure the stability of anaerobic pond, it is to increase tradition A2/ O denitrification dephosphorization technique effect, overcomes tradition A2/O method technique and carries DO and the impact of nitric acid state oxygen secretly because denitrification effect is subject to return current ratio of the mixed liquid size and phosphor-removing effect to be subject in returned sluge, and the shortcoming that the denitrogenation dephosphorizing efficiency caused is not high.
The present invention provides a kind of A2/ O denitrification dephosphorization technique, aerobic section phegma enters low speed centrifuge, carries out centrifugation, and precipitating sludge is back to anaerobism section, and supernatant liquor is back to anoxic section.
The present invention provides a kind of A2/ O denitrification dephosphorization technique, increases the A of low speed centrifuge2/ O technique by denitrogenation and dephosphorization two process areas, can better not interfere with each other.
(1) denitrification process: at aerobic section, the ammonia nitrogen that the ammonia nitrogen entered in stream and organonitrogen ammonification are become by nitrobacteria, by biological nitration effect, changes into nitrate; Aerobic section backflow mixed liquor is after whizzer is separated, and nitrate is transferred to supernatant liquor, is back to anoxic section; In anoxic section, the nitrate that internal reflux is brought into by denitrifying bacterium, by biological denitrification, changes into nitrogen and escapes in air, thus reaches the object of denitrogenation.
(2) dephosphorization process: at aerobic section, the super amount of polyP bacteria absorbs phosphorus, and by the discharge of excess sludge, is removed by phosphorus; Aerobic section backflow mixed liquor is after whizzer is separated, and polyP bacteria is transferred in precipitating sludge, is back to anaerobism section; In anaerobism section, polyP bacteria release phosphorus, and absorb the organism that lower fatty acid etc. is easily degraded.
The useful effect of the present invention:
A kind of A disclosed by the invention2/ O denitrification dephosphorization technique, the shortcoming that anaerobic zone is had a negative impact by the nitrate overcome in tradition A2/O method technique returned sluge, does not need to build equalizing tank simultaneously, saves civil engineering and operating charges use. The present invention, between anaerobism section and anoxic section, increases low speed centrifuge, returned sluge is carried out mud-water separation, and precipitating sludge is back to anaerobic zone, supernatant liquor is back to oxygen-starved area, separation efficiency height, and power consumption is few, do not increase civil engineering costs, simple to operate, can effectively ensure the stability of anaerobic pond.
Accompanying drawing explanation
Accompanying drawing 1 is process flow sheet of the present invention.
Accompanying drawing 1 illustrates: 1. anaerobism section; 2. anoxic section; 3. aerobic section; 4. mixed-liquor return; 5. enter liquid; 6. centrifugation; 7. supernatant liquor backflow; 8. solid phase precipitation backflow.
Embodiment
In order to more clearly understand above-mentioned purpose, the feature and advantage of the present invention, below in conjunction with specific embodiment, the present invention is further described in detail. It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
A lot of detail is set forth in following description so that fully understanding the present invention; but; the present invention can also adopt other to be different from other modes described here to implement, and therefore, protection scope of the present invention is by the restriction of following public specific embodiment.
Embodiment 1
A kind of A described in the embodiment of the present invention2/ O denitrification dephosphorization technique, aerobic section phegma enters low speed centrifuge, slow speed of revolution 600r/min, carries out centrifugation 5min, and precipitating sludge is back to anaerobism section, and supernatant liquor is back to anoxic section.
The above; it is only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any it is familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (5)
1. an A2/ O denitrification dephosphorization technique, it is characterised in that: aerobic section phegma enters low speed centrifuge, carries out centrifugation, and precipitating sludge is back to anaerobism section, and supernatant liquor is back to anoxic section.
2. a kind of A according to claim 12/ O denitrification dephosphorization technique, it is characterised in that: described low speed centrifuge is between anaerobism section and anoxic section, and liquid-inlet pipe connects aerobic section, and shore pipe connects anaerobism section, and liquid discharge pipe connects anoxic section.
3. a kind of A according to claim 1 and 22/ O denitrification dephosphorization technique, it is characterised in that: described low speed centrifuge shore pipe, discharge the precipitated solid part after centrifugation to anaerobism section.
4. a kind of A according to claim 1 and 22/ O denitrification dephosphorization technique, it is characterised in that: described low speed centrifuge liquid discharge pipe, discharge the supernatant fraction after centrifugation to anoxic section.
5. a kind of A according to claim 12/ O denitrification dephosphorization technique, it is characterised in that: this A2/ O denitrification dephosphorization technique in use, carries out setting low speed centrifuge rotating speed, centrifugation time according to phegma concentration, recommends the slow speed of revolution (600 �� 100) r/min, carry out centrifugation (5 �� 1) min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610189351.0A CN105621613A (en) | 2016-03-30 | 2016-03-30 | A<2>/O nitrogen and phosphorus removal technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610189351.0A CN105621613A (en) | 2016-03-30 | 2016-03-30 | A<2>/O nitrogen and phosphorus removal technology |
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| Publication Number | Publication Date |
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| CN105621613A true CN105621613A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610189351.0A Pending CN105621613A (en) | 2016-03-30 | 2016-03-30 | A<2>/O nitrogen and phosphorus removal technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357366A (en) * | 2019-08-13 | 2019-10-22 | 南京工业大学 | Biochemical treatment method for Fischer-Tropsch synthesis wastewater |
| CN111533260A (en) * | 2020-05-08 | 2020-08-14 | 格润克利环境科技有限公司 | Integrated sludge concentration separation backflow device and backflow process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269878A (en) * | 2008-05-06 | 2008-09-24 | 南京农业大学 | Return sludge separation technique for improving dephosphorization removing nitric efficiency factor of wastewater treatment |
| CN102001784A (en) * | 2010-10-18 | 2011-04-06 | 余静 | High efficiency low energy consumption urban sewage dephosphorization denitrification treatment method |
| CN102653423A (en) * | 2012-04-16 | 2012-09-05 | 同济大学 | Membrane bioreactor sewage treatment method and apparatus for enhancing denitrifying dephosphatation through mud-water separation and backflow |
| CN204529455U (en) * | 2015-03-16 | 2015-08-05 | 苏州科技学院 | Modified form A 2phosphorus reaction device is denitrogenated in the synchronous decarburization of/O microbial film |
-
2016
- 2016-03-30 CN CN201610189351.0A patent/CN105621613A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269878A (en) * | 2008-05-06 | 2008-09-24 | 南京农业大学 | Return sludge separation technique for improving dephosphorization removing nitric efficiency factor of wastewater treatment |
| CN102001784A (en) * | 2010-10-18 | 2011-04-06 | 余静 | High efficiency low energy consumption urban sewage dephosphorization denitrification treatment method |
| CN102653423A (en) * | 2012-04-16 | 2012-09-05 | 同济大学 | Membrane bioreactor sewage treatment method and apparatus for enhancing denitrifying dephosphatation through mud-water separation and backflow |
| CN204529455U (en) * | 2015-03-16 | 2015-08-05 | 苏州科技学院 | Modified form A 2phosphorus reaction device is denitrogenated in the synchronous decarburization of/O microbial film |
Non-Patent Citations (2)
| Title |
|---|
| 王荣昌等: "改良型A2/O-MBR工艺的反硝化除磷性能研究", 《环境工程学报》 * |
| 罗固源主编: "《水污染控制工程》", 30 November 2006 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357366A (en) * | 2019-08-13 | 2019-10-22 | 南京工业大学 | Biochemical treatment method for Fischer-Tropsch synthesis wastewater |
| CN110357366B (en) * | 2019-08-13 | 2022-02-11 | 南京工业大学 | Biochemical treatment method for Fischer-Tropsch synthesis wastewater |
| CN111533260A (en) * | 2020-05-08 | 2020-08-14 | 格润克利环境科技有限公司 | Integrated sludge concentration separation backflow device and backflow process |
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Application publication date: 20160601 |
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