CN202022823U - Sewage treatment system based on novel A/A2O biological treatment process - Google Patents
Sewage treatment system based on novel A/A2O biological treatment process Download PDFInfo
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- CN202022823U CN202022823U CN2011200840171U CN201120084017U CN202022823U CN 202022823 U CN202022823 U CN 202022823U CN 2011200840171 U CN2011200840171 U CN 2011200840171U CN 201120084017 U CN201120084017 U CN 201120084017U CN 202022823 U CN202022823 U CN 202022823U
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Abstract
A sewage treatment system based on a novel A/A2O biological treatment process comprises a sewage pre-treatment unit, an A/A2O biological treatment unit, a secondary sedimentation tank and an advanced treatment unit; the A/A2O biological treatment unit comprises an anaerobic tank, a first anoxic tank, a pre-aeration tank and an aerobic tank, which are communicated in sequence; a second anoxic tank is arranged between the anaerobic tank and the sewage pre-treatment unit in the A/A2O biological treatment unit; an internal reflux sludge pipeline is arranged between the aerobic tank and the second anoxic tank; an external reflux sludge pipeline is arranged between the secondary sedimentation tank and the first anoxic tank; and a surplus sludge discharge outlet is also arranged on the secondary sedimentation tank. The sewage treatment system achieves the reasonability in distribution by means of the A/A2O biological treatment process, makes full use of carbon sources, obtains better dephosphorizing effect and ensures the water yielding quality on the basis of biological nitrogen removal.
Description
Technical field
The present invention relates to Sewage treatment systems, more particularly, relate to the advanced treatment of wastewater improvement of link before.
Background technology
Water outlet behind the Sewage Plant upgrading requires to reach one-level A emission standard, and is very high to the removal requirement of N and P, must adopt the biological treatment with dephosphorization denitrogenation function.Denitrogenation is the difficult point of this treating processes, A2O technology in the prior art Sewage treatment systems as shown in Figure 1, pretreated sewage at first enters anaerobic pond, then enter second pond successively after the processing of anoxic pond, preaeration tank, Aerobic Pond, the sewage after second pond is handled goes advanced treatment unit to handle.And the excess sludge that second pond avales is discharged, and the sewage that is untreated is back to anaerobic pond and repeats above-mentioned treating processes and handle.Preaeration tank, Aerobic Pond are the ponds of handling with air effect.
In the technology of prior art, anaerobic pond is used for biological phosphate-eliminating, and anoxic pond is used for biological denitrificaion.The A2O technology of prior art is generally based on denitrogenation, and dephosphorization is auxilliary, and the phosphorus of failing to remove needs to remove in follow-up advanced treatment.Carbon source material in the raw waste water (BOD) is introduced into anaerobic pond, polyP bacteria preferentially utilizes the readily biodegradable organism in the sewage to become dominant bacteria, for condition has been created in dephosphorization, sewage enters anoxic pond then, the nitrate-nitrogen reduction that denitrifying bacteria utilizes other carbon source that may utilize will be back to anoxic pond becomes nitrogen to enter in the atmosphere, reaches the purpose of denitrogenation.Because biological denitrificaion efficient can not reach 100%, be no more than 85% generally speaking, always have a considerable amount of nitric nitrogens in the water outlet, these nitric nitrogens enter anaerobic zone with returned sluge, to preferentially capture readily biodegradable organism in the sewage, make polyP bacteria lack carbon source, lose competitive edge, reduce phosphor-removing effect.Under the not enough situation of water-inlet carbon source (BOD), this phenomenon is particularly evident.
Summary of the invention
Sewage treatment systems of the present invention is based on A/A2O biological dephosphorize denitrification treatment process, and improvement prior art A2O A2O technological reaction pond increases by an anoxic section at anaerobic/anoxic/aerobic (A/A/O), has strengthened the phosphorus removal functional of system.In the design of A/A2O biological tank, consider multipoint water feeding, multiple spot internal reflux, increase the handiness of system, system can be moved, by various modes such as common A2O to adapt to the requirement that different quality changes.Main purpose of the present invention is that the rapid decomposable organism in a small amount of water inlet of utilization is made the nitrate nitrogen in the carbon source removal returned sluge, thereby is the good environment of phosphorus release creation of postorder anaerobism section polyP bacteria, improves biological phosphor-removing effect.
In order to achieve the above object, the invention provides a kind of Sewage treatment systems, comprise the sewage pretreatment unit, A/A2O biological processing unit, second pond and the advanced treatment unit that are communicated with successively based on new A/A2O biological treatment; Described A/A2O biological processing unit comprises anaerobic pond, first anoxic pond, preaeration tank and the Aerobic Pond that is communicated with successively.Improvement of the present invention is, between anaerobic pond in the described A/A2O biological processing unit and the described sewage pretreatment unit second anoxic pond is set.In addition, be provided with the internal reflux sludge pipe between described Aerobic Pond and described second anoxic pond; Be provided with the external reflux sludge pipe between described second pond and described first anoxic pond; Described second pond also is provided with the excess sludge discharge mouth.
Under the optimal way, be provided with connecting pipeline between described sewage pretreatment unit and the described anaerobic pond.
The present invention increases by a Prepositive denitrification section before common A/A/O technology, all the water yield of returned sluge and 10%～40% (regulating according to practical situation) enters in the Prepositive denitrification section, and remaining 90%～60% the water yield enters the anaerobism section.Main purpose is that the rapid decomposable organism in a small amount of water inlet of utilization is made the nitrate nitrogen in the carbon source removal returned sluge, thereby is the good environment of phosphorus release creation of postorder anaerobism section polyP bacteria, improves biological phosphor-removing effect.The present invention considers multipoint water feeding, multiple spot internal reflux in A/A2O biological tank design, increase the handiness of technology, makes this technology also can be by kinds of processes mode operations such as common A2O, to adapt to the requirement that different quality changes.System of the present invention relies on A/A2O technology properly distributed, and makes full use of carbon source, on the basis that guarantees biological denitrificaion, obtains phosphor-removing effect preferably, guarantees effluent quality.
Description of drawings
Fig. 1 is the structural representation of the A2O technology in the prior art Sewage treatment systems;
Fig. 2 is the structural representation of Sewage treatment systems of the present invention.
Embodiment
As shown in Figure 2, the present invention is based on the Sewage treatment systems of new A/A2O biological treatment, comprise the sewage pretreatment unit, A/A2O biological processing unit, second pond and the advanced treatment unit that are communicated with successively; Described A/A2O biological processing unit comprises anaerobic pond, first anoxic pond, preaeration tank and the Aerobic Pond that is communicated with successively.Wherein, between anaerobic pond in the described A/A2O biological processing unit and the described sewage pretreatment unit second anoxic pond is set; Be provided with the internal reflux sludge pipe between described Aerobic Pond and described second anoxic pond; Be provided with the external reflux sludge pipe between described second pond and described first anoxic pond; Described second pond also is provided with the excess sludge discharge mouth.Under the optimum way, be provided with connecting pipeline between described sewage pretreatment unit and the described anaerobic pond.
The present invention increases by a Prepositive denitrification section before the A/A/O of prior art technology, the water yield of whole returned sluges and 10%～40% (regulating according to practical situation) enters the anoxic section and carries out preposition anti-nitre, and remaining 90%～60% the water yield enters the anaerobism section.The main technique purpose is that the rapid decomposable organism in a small amount of water inlet of utilization is made the nitrate nitrogen in the carbon source removal returned sluge, thereby is the good environment of phosphorus release creation of postorder anaerobism section polyP bacteria, improves biological phosphor-removing effect.Guarantee that water outlet phosphorus can be stablized the one-level A standard that reaches under the situation of denitrification effect.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (2)
1. the Sewage treatment systems based on new A/A2O biological treatment comprises the sewage pretreatment unit, A/A2O biological processing unit, second pond and the advanced treatment unit that are communicated with successively; Described A/A2O biological processing unit comprises anaerobic pond, first anoxic pond, preaeration tank and the Aerobic Pond that is communicated with successively; It is characterized in that;
Between anaerobic pond in the described A/A2O biological processing unit and the described sewage pretreatment unit second anoxic pond is set;
Be provided with the internal reflux sludge pipe between described Aerobic Pond and described second anoxic pond; Be provided with the external reflux sludge pipe between described second pond and described first anoxic pond; Described second pond also is provided with the excess sludge discharge mouth.
2. according to the described Sewage treatment systems of claim 1, it is characterized in that, be provided with connecting pipeline between described sewage pretreatment unit and the described anaerobic pond based on new A/A2O biological treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200840171U CN202022823U (en) | 2011-03-25 | 2011-03-25 | Sewage treatment system based on novel A/A2O biological treatment process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200840171U CN202022823U (en) | 2011-03-25 | 2011-03-25 | Sewage treatment system based on novel A/A2O biological treatment process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659288A (en) * | 2012-05-21 | 2012-09-12 | 重庆大学 | Low-carbon-source sewage treatment system for reinforcing denitrification and dephosphorization functions and method |
| CN103145300A (en) * | 2013-03-27 | 2013-06-12 | 四川省水处理及资源化工程技术研究中心 | Sewage treatment system |
| CN103539322A (en) * | 2013-11-06 | 2014-01-29 | 北京市市政工程设计研究总院 | Method for removing nitrogen and phosphorus from sewage and special equipment for implementing method |
| CN103739169A (en) * | 2014-01-21 | 2014-04-23 | 中冶华天工程技术有限公司 | Nitrogen and phosphorus removal method for biological sewage treatment |
| CN104058554A (en) * | 2014-07-04 | 2014-09-24 | 哈尔滨工业大学深圳研究生院 | A2O2-MBR sewage treatment process and device |
| CN104341075A (en) * | 2013-08-01 | 2015-02-11 | 中国环境科学研究院 | Variable-volume improved A<2>/O deep nitrogen and phosphorus removal process for sewage |
| CN108217947A (en) * | 2018-02-14 | 2018-06-29 | 温志军 | A kind of batch-type control method of sewage disposal AO and AAO techniques |
-
2011
- 2011-03-25 CN CN2011200840171U patent/CN202022823U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659288A (en) * | 2012-05-21 | 2012-09-12 | 重庆大学 | Low-carbon-source sewage treatment system for reinforcing denitrification and dephosphorization functions and method |
| CN103145300A (en) * | 2013-03-27 | 2013-06-12 | 四川省水处理及资源化工程技术研究中心 | Sewage treatment system |
| CN103145300B (en) * | 2013-03-27 | 2015-09-16 | 四川省水处理及资源化工程技术研究中心 | A kind of sewage disposal and regeneration Apparatus for () and method therefor |
| CN104341075A (en) * | 2013-08-01 | 2015-02-11 | 中国环境科学研究院 | Variable-volume improved A<2>/O deep nitrogen and phosphorus removal process for sewage |
| CN103539322A (en) * | 2013-11-06 | 2014-01-29 | 北京市市政工程设计研究总院 | Method for removing nitrogen and phosphorus from sewage and special equipment for implementing method |
| CN103739169A (en) * | 2014-01-21 | 2014-04-23 | 中冶华天工程技术有限公司 | Nitrogen and phosphorus removal method for biological sewage treatment |
| CN104058554A (en) * | 2014-07-04 | 2014-09-24 | 哈尔滨工业大学深圳研究生院 | A2O2-MBR sewage treatment process and device |
| CN108217947A (en) * | 2018-02-14 | 2018-06-29 | 温志军 | A kind of batch-type control method of sewage disposal AO and AAO techniques |
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Granted publication date: 20111102 Termination date: 20150325 |
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