CN104230107A - A2/O (anaerobic-anoxic-oxic) and MBR (membrane bioreactor) combined sewage regeneration technology and device - Google Patents
A2/O (anaerobic-anoxic-oxic) and MBR (membrane bioreactor) combined sewage regeneration technology and device Download PDFInfo
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- CN104230107A CN104230107A CN201410473642.3A CN201410473642A CN104230107A CN 104230107 A CN104230107 A CN 104230107A CN 201410473642 A CN201410473642 A CN 201410473642A CN 104230107 A CN104230107 A CN 104230107A
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Abstract
The invention discloses an A2/O (anaerobic-anoxic-oxic) and MBR (membrane bioreactor) combined sewage regeneration technology by means of which the sewage passes through an anaerobic tank, an anoxic tank, an oxic tank and an MBR membrane tank sequentially for treatment and is drained. The technology is characterized by further comprising a step that a mixed solution in the MBR membrane tank is deoxidized by a deoxidization tank and flows back to the anaerobic tank or the anoxic tank. The invention further comprises an A2/O and MBR combined sewage regeneration device. The improved A2/O and MBR combined sewage regeneration technology and device have the advantages of high nitrogen and phosphorus removal efficiency, stable operation, good flexibility of operation, high outlet water quality and the like, the outlet water can reach water quality standard of recycled water reuse, and the ideal sewage treatment technology combines biological treatment and advanced treatment.
Description
Technical field
The present invention relates to and belong to water treatment field, particularly modified form A2/O+MBR combined sewage water reclaiming process and device thereof.
Background technology
" 12 " period, mark transformation along with carrying of sewage work, improving constantly of Treated sewage reusing ratio, has higher requirement to sewage treatment process and Effluent criteria.For satisfied national urban sewage reutilization standard, in sewage treatment process, secondary biochemical treatment need possess denitrogenation dephosphorizing function usually, generally comprise the alternate cycles of anaerobism, anoxic, aerobic three various process, more employing suspension type activated sludge process, mainly contains three series: oxidation ditch series, sequencing batch reactor (SBR) series, A2/O are serial.1) oxidation ditch series of processes: when sludge loading is too high, easily produce Filamentous Bulking; Mud is partially long for age, and sludge aging, easily produces foam; Flow velocity inequality and sludgd deposition problem, greatly reduce the useful volume of oxidation ditch, reduces treatment effect, affect effluent quality.2) SBR series of processes: working time and dissolved oxygen are two important parameters affecting Nitrogen/Phosphorus Removal.The technique resting period is run, and requires high to automatic control; Become water level to run, power consumption is larger; Denitrogenation dephosphorizing efficiency is not too high, and sludge stabilization is poor.3) A2/O series of processes: there is technical process simple, contaminant removal efficiency is high, stable, have good anti impulsion load, sludge settling property is good, but system sludge concentration is lower, and sludge reflux is in anaerobic pond, higher containing nitrate concentration, fight for organic carbon source with polyP bacteria, denitrogenation dephosphorizing requirement cannot be met simultaneously.
Traditional A2/O process flow sheet as shown in Figure 1, it only adopts secondary biochemical treatment art breading, and water outlet can't reach regeneration standard, and the mainly total nitrogen, total phosphorus, colourity etc. of more difficult further biological treatment, must increase advanced treatment process.Advanced treatment process should according to effluent reuse situation, consider technology, economic factors, common technique mainly contains: charcoal absorption, ozone-active carbon, deamination, ion-exchange, membrane separation technique, BAF, ozone oxidation, natural purification system etc.
Due to membrane filtration technique can remove conventional treatment process be difficult to remove pollutent, especially based on micro-filtration (MF) and ultrafiltration (UF) membrane filtration technique, microorganism in energy effectively catching water, turbidity, macromole hardly degraded organic substance, be widely used in the regeneration process carrying mark transformation and sewage of sewage work.But membrane filtration technique mechanism is based on sieving, in the face of the emission request that nitrogen, phosphorus ligands day are stricter, with the combination of secondary biochemical treatment, utilize the advantage of membrane technique, the denitrogenation dephosphorizing function of enhanced biological section, becomes the focus of research day by day.
Summary of the invention
For the problems referred to above, the object of the invention is to be optimized combination to second-stage treatment and advanced treatment in regeneration effluent treatment process, change the reflux type of traditional A2/O, increase the handiness of technological operation, a kind of technique is simple, sludge concentration is high, denitrogenation dephosphorizing efficiency is high, stable, flexibility of operation is good, effluent quality is high A2/O+ MBR combined sewage water reclaiming process and manufacture thereof are provided.
For achieving the above object, technical scheme proposed by the invention is: a kind of A2/O+ MBR combined sewage water reclaiming process, and described sewage is undertaken processing rear water outlet by anaerobic pond, anoxic pond, Aerobic Pond, MBR membrane cisterna successively; It is characterized in that: also comprise the step that the mixed solution in MBR membrane cisterna to be back to anaerobic pond or anoxic pond by after the deoxidation of deoxidation pond.
Preferably, as water temperature > 15 DEG C, MBR membrane cisterna mixed solution enters anoxic pond after the deoxidation of deoxidation pond, and anoxic pond end is back to anaerobic pond front end with the flow of one times of respective handling scale water yield; When water temperature≤15 DEG C, membrane cisterna mixed solution enters anaerobic pond after the deoxidation of deoxidation pond, stops anoxic pond to the backflow of anaerobic pond.
Preferably, in MBR membrane cisterna, mixed solution is with the flow of four times of respective handling scale water yields, behind deoxidation pond, is back to anoxic pond or anaerobic pond front end.
Preferably, the membrane module in MBR membrane cisterna adopts hollow fiber film assembly, and film silk is PVDF material, aperture 0.04-0.2 μm, flux 15-30L/ (m2h), sludge concentration 6-10mg/L.
Preferably, the deoxidation tank waterpower residence time is 0.5-1.0h, avoids the high-solubility oxygen of mixed solution in membrane cisterna to affect Nitrogen/Phosphorus Removal.
Preferably, in anoxic pond, Dissolved Oxygen concentration Control is at below 0.5mg/L, and in anaerobic pond, Dissolved Oxygen concentration Control is at below 0.2mg/L.
The present invention also comprises a kind of A2/O+ MBR combined sewage water regenerating unit, comprise the anaerobic pond, anoxic pond, Aerobic Pond, the MBR membrane cisterna that connect successively, it is characterized in that: also comprise a deoxidation pond, described deoxidation pond is connected with MBR membrane cisterna, anaerobic pond, anoxic pond, and described deoxidation pond is used for being back to anaerobic pond or anoxic pond by after the mixed solution deoxidation in MBR membrane cisterna.
Preferably, also comprise a sludge return pipe, described sludge return pipe connects anoxic pond and anaerobic pond, by the sewage backflow in anoxic pond to anaerobic pond.
Preferably, described regeneration effluent device adopts buried ecological construction.
Preferably, each treating pond adopts steel and concrete structure, shares pool wall, is designed to an integral module.
Adopt technique scheme, modified form A2/O+MBR combined sewage water reclaiming process of the present invention and device thereof, by the mixed solution in MBR membrane cisterna is back to anaerobic pond or anoxic pond according to temperature conditions after deoxidation, change traditional sludge reflux mode, add the flexibility of operation of mixed-liquor return, strengthening biological carbon and phosphorous removal function, is aided with chemical dephosphorization, what make full use of MBR membrane cisterna retains separation function simultaneously, ensures effluent quality; Have that denitrogenation dephosphorizing efficiency is high, stable, flexibility of operation is good, effluent quality advantages of higher, water outlet can reach the water quality standard of reclaimed water reuse, is the sewage treatment process that desirable biological treatment combines with advanced treatment.
Accompanying drawing explanation
Fig. 1 is traditional A2/O process flow diagram;
Fig. 2 is A2/O+ MBR combined sewage water regenerating unit schematic diagram of the present invention;
Fig. 3 is A2/O+ MBR combined sewage water reclaiming process denitrogenation dephosphorizing mode chart of the present invention;
Fig. 4 is A2/O+ MBR combined sewage water reclaiming process denitrogenation mode chart of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 2, A2/O+ MBR combined sewage water regenerating unit, comprise the anaerobic pond, anoxic pond, Aerobic Pond, the MBR membrane cisterna that connect successively, also comprise a deoxidation pond, described deoxidation pond is connected with MBR membrane cisterna, anaerobic pond, anoxic pond, and described deoxidation pond is used for being back to anaerobic pond or anoxic pond by after the mixed solution deoxidation in MBR membrane cisterna.Preferably, also comprise a sludge return pipe, described sludge return pipe connects anoxic pond and anaerobic pond, by the sewage backflow in anoxic pond to anaerobic pond.
Preferably, described regeneration effluent device adopts buried ecological construction.
Preferably, each treating pond adopts steel and concrete structure, shares pool wall, is designed to an integral module.
During concrete enforcement, sewage after pretreatment enters anaerobic pond, anoxic pond, Aerobic Pond successively; Mixed flow in Aerobic Pond with run by gravity, or adopts pump to promote to enter membrane cisterna, and Aerobic Pond realizes the excessive consumption to the removal of BOD5, nitrification and phosphorus.Time normal temperature (water temperature > 15 DEG C), as shown in Figure 3, run biological carbon and phosphorous removal pattern, membrane cisterna mixed solution is back to anoxic pond front end through deoxidation pond and carries out denitrification denitrogenation, and anoxic pond end is back to anaerobic pond front end with the flow of one times of respective handling scale water yield; During low temperature (water temperature≤15 DEG C), as shown in Figure 4, run raw denitrogenation pattern, membrane cisterna mixed solution is back to anaerobic pond through deoxidation pond, and stop sludge reflux, now technique principal security denitrification effect, is aided with chemical dephosphorization, in Aerobic Pond, adds Dephosphorization reagent; Membrane cisterna retains removal further to Recalcitrant chemicals, and what go out water pump aspirates water outlet from membrane module rising pipe.
Embodiment 1
For (mechanical grille, equalizing tank, the film grid) water inlet after pretreatment of New city core, somewhere sewage works, influent COD, ammonia nitrogen and total phosphorus value (COD=100-400mg/L, ammonia nitrogen=10-40mg/L, TP=2.5-3.5mg/L).The hydraulic detention time (HRT) of deoxidation, anaerobism, anoxic and aerobic zone is respectively 0.5h, 1h, 2.5h and 3h, and return current ratio of the mixed liquid is 200%, and return sludge ratio is 100%.During sewage water temperature > 15 DEG C, run biological carbon and phosphorous removal pattern, carry out biological carbon and phosphorous removal; During water temperature≤15 DEG C, run biological denitrificaion pattern, in Aerobic Pond, add 30mg/L Tai-Ace S 150.MBR membrane bioreactor adopts hollow fiber film assembly.This treatment unit water outlet reaches " urban sewage reutilization urban reclaimed water water quality " (GB/T18920-2002) urban afforestation water, water quality standard of flushing the toilet.
Embodiment 2
Embodiment 2 is certain reused water processing station, landscape lake engineering, is with the difference of embodiment 1, and increase degree of depth chemical dephosphorization technique after the water outlet of MBR membrane bioreactor, polymerize aluminum chloride dosage is 30mg/L; During water temperature≤15 DEG C, when running denitrogenation pattern, in Aerobic Pond, add 20mg/L polymerize aluminum chloride.Depth type filtration adopts active sand filter tank, selects filtering velocity to be 5m3/ (m2h).Owing to adding degree of depth chemical dephosphorization technique, after process, water outlet reaches " urban sewage reutilization water for scenic environment use water quality " (GB/T 18920-2002) standard.
Can be drawn by embodiment 1,2, after carrying out regeneration effluent process by this technique, Nitrogen/Phosphorus Removal is good, and process operation handiness is high, goes out water quality and can reach urban reclaimed water water quality standard; Separately according to project reality, degree of depth chemical dephosphorization technique can be increased, water for scenic environment use water quality standard can be reached.
Although specifically show in conjunction with preferred embodiment and describe the present invention; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; in the form and details the present invention is made a variety of changes, be protection scope of the present invention.
Claims (10)
1. an A2/O+ MBR combined sewage water reclaiming process, described sewage is undertaken processing rear water outlet by anaerobic pond, anoxic pond, Aerobic Pond, MBR membrane cisterna successively; It is characterized in that: also comprise the step that the mixed solution in MBR membrane cisterna to be back to anaerobic pond or anoxic pond by after the deoxidation of deoxidation pond.
2. a kind of A2/O+ MBR combined sewage water reclaiming process according to claim 1, it is characterized in that, as water temperature > 15 DEG C, MBR membrane cisterna mixed solution enters anoxic pond after the deoxidation of deoxidation pond, and anoxic pond end is back to anaerobic pond front end with the flow of one times of respective handling scale water yield; When water temperature≤15 DEG C, membrane cisterna mixed solution enters anaerobic pond after the deoxidation of deoxidation pond, stops anoxic pond to the backflow of anaerobic pond.
3. a kind of A2/O+ MBR combined sewage water reclaiming process according to claim 1 and 2, it is characterized in that, in MBR membrane cisterna, mixed solution is with the flow of four times of respective handling scale water yields, behind deoxidation pond, is back to anoxic pond or anaerobic pond front end.
4. a kind of A2/O+ MBR combined sewage water reclaiming process according to claim 1 and 2, it is characterized in that, membrane module in described MBR membrane cisterna adopts hollow fiber film assembly, film silk is PVDF material, aperture 0.04-0.2 μm, flux 15-30L/ (m2h), sludge concentration 6-10mg/L.
5. a kind of A2/O+ MBR combined sewage water reclaiming process according to claim 1 and 2, it is characterized in that, the described deoxidation tank waterpower residence time is 0.5-1.0h.
6. a kind of A2/O+ MBR combined sewage water reclaiming process according to claim 1 and 2, it is characterized in that, in described anoxic pond, Dissolved Oxygen concentration Control is at below 0.5mg/L, and in described anaerobic pond, Dissolved Oxygen concentration Control is at below 0.2mg/L.
7. an A2/O+ MBR combined sewage water regenerating unit, comprise the anaerobic pond, anoxic pond, Aerobic Pond, the MBR membrane cisterna that connect successively, it is characterized in that: also comprise a deoxidation pond, described deoxidation pond is connected with MBR membrane cisterna, anaerobic pond, anoxic pond, and described deoxidation pond is used for being back to anaerobic pond or anoxic pond by after the mixed solution deoxidation in MBR membrane cisterna.
8. a kind of A2/O+ MBR combined sewage water regenerating unit according to claim 7, is characterized in that, also comprise a sludge return pipe, and described sludge return pipe connects anoxic pond and anaerobic pond, by the sewage backflow in anoxic pond to anaerobic pond.
9. a kind of A2/O+ MBR combined sewage water regenerating unit according to claim 7, it is characterized in that, described regeneration effluent device adopts buried ecological construction.
10. a kind of A2/O+ MBR combined sewage water regenerating unit according to claim 7, is characterized in that, each treating pond adopts steel and concrete structure, shares pool wall, is designed to an integral module.
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| CN201410473642.3A CN104230107B (en) | 2014-03-28 | 2014-09-17 | A kind of A2/O+ MBR combined sewage water reclaiming process and device thereof |
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| CN2014101214563 | 2014-03-28 | ||
| CN201410121456.3 | 2014-03-31 | ||
| CN201410121456 | 2014-03-31 | ||
| CN201410473642.3A CN104230107B (en) | 2014-03-28 | 2014-09-17 | A kind of A2/O+ MBR combined sewage water reclaiming process and device thereof |
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| CN104230107A true CN104230107A (en) | 2014-12-24 |
| CN104230107B CN104230107B (en) | 2016-03-02 |
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| CN201410165347.1A Withdrawn CN103896463A (en) | 2014-03-31 | 2014-04-24 | A<2>/O and MBR combined sewage regenerating process and device |
| CN201420533332.1U Active CN204058199U (en) | 2014-03-28 | 2014-09-17 | A kind of A2/O+ MBR combined sewage water regenerating unit |
| CN201410473642.3A Active CN104230107B (en) | 2014-03-28 | 2014-09-17 | A kind of A2/O+ MBR combined sewage water reclaiming process and device thereof |
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| CN201410165347.1A Withdrawn CN103896463A (en) | 2014-03-31 | 2014-04-24 | A<2>/O and MBR combined sewage regenerating process and device |
| CN201420533332.1U Active CN204058199U (en) | 2014-03-28 | 2014-09-17 | A kind of A2/O+ MBR combined sewage water regenerating unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108675575A (en) * | 2018-08-03 | 2018-10-19 | 北京市市政工程设计研究总院有限公司 | A kind of A2O-D2Cooperate with the technique and device of denitrogenation dephosphorizing |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103896463A (en) * | 2014-03-31 | 2014-07-02 | 中联环有限公司 | A<2>/O and MBR combined sewage regenerating process and device |
| CN104118969B (en) * | 2014-07-08 | 2016-02-17 | 广州市市政工程设计研究总院 | A kind of A2O-MBR waste disposal plant and method |
| CN104341043A (en) * | 2014-11-19 | 2015-02-11 | 中国市政工程华北设计研究总院有限公司 | System for enhanced denitrification with inner reflux mixing liquid type oxygen removal pool and method |
| CN105836965A (en) * | 2016-04-29 | 2016-08-10 | 无锡普汇环保科技有限公司 | Intelligentized sewage treatment expert system |
| CN106186327A (en) * | 2016-08-30 | 2016-12-07 | 宁国市渠源净水设备有限公司 | Waste water pollutant-removing system and using method |
| CN106882875A (en) * | 2017-02-16 | 2017-06-23 | 洪胜男 | With the system and method for nitrogen phosphorus in membrane technology removal sewage |
| CN111170586A (en) * | 2020-02-24 | 2020-05-19 | 大禹环保（天津）有限公司 | Control room of water treatment integrated equipment |
| CN112093899B (en) * | 2020-07-30 | 2022-03-22 | 同济大学 | Method and system for biological nitrogen and phosphorus removal of sewage |
| CN114702127A (en) * | 2022-04-21 | 2022-07-05 | 黑龙江碧水源环保工程有限公司 | Circulating biological reaction membrane separation sewage treatment system capable of realizing multipoint water feeding |
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- 2014-04-24 CN CN201410165347.1A patent/CN103896463A/en not_active Withdrawn
- 2014-09-17 CN CN201420533332.1U patent/CN204058199U/en active Active
- 2014-09-17 CN CN201410473642.3A patent/CN104230107B/en active Active
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| CN204058199U (en) | 2014-12-31 |
| CN103896463A (en) | 2014-07-02 |
| CN104230107B (en) | 2016-03-02 |
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