CN1480413A - Treating technical method for denitrogenation and dephosphorization from waste water - Google Patents
Treating technical method for denitrogenation and dephosphorization from waste water Download PDFInfo
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- CN1480413A CN1480413A CNA021354642A CN02135464A CN1480413A CN 1480413 A CN1480413 A CN 1480413A CN A021354642 A CNA021354642 A CN A021354642A CN 02135464 A CN02135464 A CN 02135464A CN 1480413 A CN1480413 A CN 1480413A
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- dephosphorization
- anaerobic
- denitrogenation
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- waste water
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Abstract
A process for denitrifying and dephosphorizing sewage features use of biological treating method in such manner that the anoxic condition, anaerobic condition and aerobic condition are sequentially arranged. Its advantages are no conflict in carbon source and sludge age, and high effect.
Description
Technical field:
The present invention relates to a kind of processing method of utilizing biotechnology to dispose of sewage, particularly a kind of municipal effluent denitrogenation dephosphorizing inversion A/A/O processing method.
Background technology:
Municipal effluent (biology) treatment technology has experienced three developmental stage.In the sewage disposal technology early stage of development, people recognize the harm of organic contamination to environmental ecology, thereby the major objective of the removal technology of aerobic organic pollutant (COD) and suspended solids (SS) as sewage disposal.To the sixties and the seventies, along with conventional two stage biological treatment technology the popularizing of industrialized country, it is found that and only remove COD and SS is not enough.The existence of ammonia nitrogen (NH3-N) still causes the black smelly and dissolved oxygen amount of water body low excessively, and the appearance of this problem makes conventional second-stage treatment technology develop into the combined removal of organism and ammonia nitrogen, the i.e. nitration treatment of sewage from simple organic removal.To the seventies and the eighties, because the water nutrition problem is serious day by day, the degree of depth second-stage treatment stage that the actual needs that sewerage nitrogen and phosphor is removed has entered the two stage biological treatment technology to have the dephosphorization denitrogenation function.So the municipal sewage treatment object of today comprises COD, BOD
5, SS and nitrogen, phosphorus nutrition material etc., this just requires to possess multiple processing capacity simultaneously in same sewage treatment process system, and biological carbon and phosphorous removal technical matters wherein is the core of municipal sewage treatment.
In sewage treatment process, when biological denitrificaion and biological phosphate-eliminating coexisted in same treatment system, biological denitrificaion and biological phosphate-eliminating existed carbon source contradiction, mud contradiction in age and nitrate problem etc. usually.Traditional biological denitrification phosphorous removal technique preferentially satisfies the demand of biological phosphate-eliminating to carbon source, having formed to sacrifice denitrogenation is the treatment process that cost improves biological denitrification dephosphorization efficiency by using, being about to anaerobic zone places process system foremost, the oxygen-starved area occupies after the anaerobic zone, is anaerobic/anoxic/aerobic processing set-up form.But this processing set-up form is unfavorable for improving dephosphorization efficiency by using.At first, only some active sludge has experienced complete anaerobic phosphorus release and aerobic suction phosphorus process, and the microorganism that the overwhelming majority does not experience reaction process like this may not possess the dephosphorization ability; Moreover, the dephosphorization microorganism is behind anaerobic phosphorus release, earlier through the lower oxygen-starved area of biochemical efficiency, just enter the higher aerobic zone of biochemical efficiency then, so effective utilization of the suction phosphorus power that under anaerobic forms for the dephosphorization microorganism may have a negative impact; Secondly, the nitrate that returned sluge carries has a negative impact to anaerobic phosphorus release inevitably.
At present usually used denitrification dephosphorization technique is that anaerobic phosphorus release is placed before the anoxic denitrification, and this is arranged in and is based on a kind of like this understanding in theory, that is: the height of anaerobic phosphorus release level has extreme importance for the dephosphorization ability that improves system.Anaerobic zone can make the dephosphorization microorganism preferentially obtain carbon source and also fully release phosphorus preceding.But this decoration form is suspectable: for conventional denitrification dephosphorization technique system, owing to there is the nitrification liquid internal recycle, in fact only some has experienced complete anaerobism, aerobic processes to the excess sludge that system discharges, and all the other then directly enter aerobic zone by the oxygen-starved area without anaerobic state basically.And nitrate has a negative impact to anaerobic zone in the returned sluge.Conventional denitrification dephosphorization technique does not solve the contradictory problems in the treatment system.The present invention is intended to overcome the above-mentioned shortcoming that exists in the existing denitrification dephosphorization technique, seeks the novel method of the technical contradiction in the existing technology of a kind of effective solution.
Summary of the invention:
In order to solve the problem that exists in the existing biological denitrification phosphorous removal technique Treating Municipal Sewage technology, the present invention is directed to the shortcoming that technological process exists in the prior art, adopt inversion A/A/O technology to realize the effect of denitrogenation dephosphorizing.The ultimate principle of its biological denitrificaion is: the nitrogen in the sewage is under action of microorganisms, after ammonification and nitrification (aerobic condition), be converted into nitric nitrogen, nitric nitrogen is through denitrification (anoxia condition), be converted into gaseous nitrogen and from sewage, overflow, thereby reach the purpose of sewage water denitrification.Wherein, denitrifying microorganism need consume carbon source (carbon source refers to the easily organism of degraded) in denitrification process.Its biological phosphate-eliminating ultimate principle is: microorganism under anaerobic is hydrolyzed to orthophosphoric acid salt to intracellular poly-phosphorus and is discharged in the water, therefrom obtains energy, absorbs carbon source in the sewage simultaneously and is used for synthetic energy storage thing PHB etc. and stores in the cell; Under aerobic condition, materials such as the intravital PHB of dephosphorization microbiological oxidation energy generate energy utilizes this energy excessive absorption phosphoric acid salt from sewage to come poly-phosphorus in the synthetic cell simultaneously; Usually aerobic condition suction phosphorus amount is released the phosphorus amount greater than anaerobic condition, so can realize the purpose of biological high-efficiency dephosphorization by the discharging excess sludge.For municipal effluent, carbon source relative deficiency in the sewage.And, because biological denitrificaion and biological phosphate-eliminating more complicated, need relate to nitrated, denitrification, release phosphorus and inhale processes such as phosphorus, the purpose difference of each process, also different to the requirement of microorganism composition, carbon source and envrionment conditions.Usually there is following principal contradiction: the one, carbon source contradiction: carbon source is insufficient for the requirement of denitrogenation and dephosphorization process in the municipal effluent, therefore, contradiction appears in the demand side to carbon source between biological denitrificaion and the biological phosphate-eliminating.The 2nd, mud contradiction in age: biological denitrification process need be controlled bigger mud could guarantee higher removal age, and the less mud of biological phosphate-eliminating process need is beneficial to dephosphorization age.The 3rd, nitrate contradiction: when the anaerobic zone of biological treatment system has nitric nitrogen to exist, do not realize anaerobic environment, will influence phosphor-removing effect.The key that solves nitrate contradiction is how before returned sluge enters anaerobic zone, manages its nitrate that carries is consumed.
The present invention is inverted the anaerobic/anoxic environment of traditional biological denitrification dephosphorization technique, form hypoxic/anaerobic/aerobic processing set-up form, its main processes is: earlier sewage is carried out preliminary sedimentation in short-term, after carrying out a biological disposal upon by hypoxic/anaerobic/aerobic (A/A/O) order again, carry out secondary sedimentation, get rid of supernatant in the precipitation, will enter circulating treatment procedure behind the residual sludge reflux in the lump more simultaneously, only keep a cover mud return-flow system.Hypoxic/anaerobic/aerobic process flow process that the present invention proposes places anoxic denitrification before the anaerobic phosphorus release, and the internal circulation system and the mud return-flow system of conventional A/A/O denitrification dephosphorization technique united two into one, only keep a cover mud return-flow system, compare with traditional denitrification dephosphorization technique, inversion A/A/O technology has the following advantages: 1. under the situation that preferentially satisfies denitrification denitrogenation, the dephosphorization microorganism directly enters aerobic environment from anaerobic environment, can effectively utilize the suction phosphorus power that forms under the anaerobic condition more, dephosphorization efficiency by using also is improved.2. have only a cover sewage backflow system, simplified technical process, not only capital construction and working cost reduce, and are convenient to maintenance management.3. well solved in the denitrification dephosphorization system " nitrate problem " to the influence of anaerobic environment.
Embodiment:
The equipment layout flow process of carrying out denitrification dephosphorization technique according to existing conventional biological treatment is inverted in the oxygen-starved area before the anaerobic zone, make three Chi Qu form hypoxic/anaerobic/aerobic flow arrangement successively, make processed sewage before entering the oxygen-starved area, carry out in short-term preliminary sedimentation 0.5～1.0 hour earlier, enter the oxygen-starved area behind the large granular impurity and carry out 2～3 hours denitrification denitrogenation to remove; Again the mixed solution behind the denitrification is entered anaerobic zone, the organism that organism was under anaerobic carried out 2～3 hours absorbs and anaerobic phosphorus release, make mixed solution enter aerobic zone then, organism is removed through 6～10 hours aerobic degradation, realized the aerobic nitrification of nitrogen and the aerobic absorption of phosphorus simultaneously.Afterwards, again the aerobic zone mixed solution is carried out precipitate and separate in settling tank, supernatant is as the discharge of purifying waste water after handling, and a part of mud of lower floor is back to the oxygen-starved area carries out next hypoxic/anaerobic/aerobic working cycle, and remaining enters sludge treating system as excess sludge.
Its inversion A of the present invention/A/O technology anoxic, anaerobism, the main operating parameter of aerobic each section are:
Oxygen-starved area hydraulic detention time 2.0～3.0 hours
Anaerobic zone hydraulic detention time 2.0～3.0 hours
Aerobic zone hydraulic detention time 6.0～10.0 hours
Return sludge ratio (R) 1.5～2.5
Mud age (SRT) 8～20 days
Aerobic zone dissolved oxygen (DO) 1.5～2.0mg/l
Oxygen-starved area, anaerobic zone water inlet allocation proportion 3: 1
Oxygen-starved area, anaerobic zone stirring intensity 3～5W/M
3Effectively the pond holds
Wherein water inlet is all adopted submerged with returned sluge, adopts water inlet at anoxic, anaerobism section top distributing inlet simultaneously; Anoxic, anaerobism section adopt the stirring of alr mode mixing under water; Aerobic zone top is established and can be regulated section, and this section is established aerator and whipping appts simultaneously.Inversion A/each section of A/O technology biochemical reaction tank should adopt the pond type structural form of lattice, and anoxic, anaerobism section total number of divisions are not less than 2.
Present embodiment is process object with the municipal effluent, mainly remove organism, nitrogen and phosphorus, mainly carry out denitrification denitrogenation in the oxygen-starved area wherein, and mainly carry out anaerobic phosphorus release in the anaerobic zone, further carry out degradation of organic substances in the aerobic zone, the excess of the nitrated and phosphorus of ammonia nitrogen absorbs.
Claims (4)
1. treating technical method for denitrogenation and dephosphorization from waste water, earlier sewage is carried out preliminary sedimentation, again by after hypoxic/anaerobic/aerobic order is carried out a biological disposal upon, carry out secondary sedimentation, discharge supernatant liquor in the precipitation, to enter circulating treatment procedure behind the residual sludge reflux in the lump more simultaneously, it is characterized in that the anaerobic/anoxic environment of traditional biological denitrification dephosphorization technique is inverted, form hypoxic/anaerobic/aerobic processing set-up form.
2. a kind for the treatment of technical method for denitrogenation and dephosphorization from waste water according to claim 1 is characterized in that the internal circulation system and the mud return-flow system of conventional A/A/O denitrification dephosphorization technique are united two into one, and only keeps a cover mud return-flow system.
3. a kind for the treatment of technical method for denitrogenation and dephosphorization from waste water according to claim 1 is characterized in that into water and returned sluge employing submerged, at anoxic, anaerobism section top distributing inlet; Anoxic, anaerobism section adopt to mix under water and stir; Aerobic zone top is established and can be regulated section, establishes aerator and whipping appts simultaneously.
4. a kind for the treatment of technical method for denitrogenation and dephosphorization from waste water according to claim 1 is characterized in that each section of inversion A/A/O technology biochemical reaction tank adopts the pond type structural form of lattice, and anoxic, anaerobism section total number of divisions are not less than 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA021354642A CN1480413A (en) | 2002-09-04 | 2002-09-04 | Treating technical method for denitrogenation and dephosphorization from waste water |
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| CNA021354642A CN1480413A (en) | 2002-09-04 | 2002-09-04 | Treating technical method for denitrogenation and dephosphorization from waste water |
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| CN1480413A true CN1480413A (en) | 2004-03-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126817A (en) * | 2011-04-27 | 2011-07-20 | 天津市市政工程设计研究院 | AO high-efficiency nitrogen and phosphorus removal system |
| CN103435231A (en) * | 2013-09-05 | 2013-12-11 | 中国水电顾问集团中南勘测设计研究院 | Intensive nitrogen-phosphorus removing membrane biological reaction device and sewage treatment method |
| CN110498562A (en) * | 2019-08-08 | 2019-11-26 | 苏州苏净环保工程有限公司 | Treatment method of high-concentration stripping liquid wastewater |
| CN111606418A (en) * | 2020-04-28 | 2020-09-01 | 中国市政工程中南设计研究总院有限公司 | Subsection water inlet inversion A2O coupling multistage AO biological pond + MBR degree of depth nitrogen and phosphorus removal system |
| CN113816566A (en) * | 2021-10-12 | 2021-12-21 | 四川海天环保能源有限公司 | Urban sewage A2O-MBR combined nitrogen and phosphorus removal system |
-
2002
- 2002-09-04 CN CNA021354642A patent/CN1480413A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126817A (en) * | 2011-04-27 | 2011-07-20 | 天津市市政工程设计研究院 | AO high-efficiency nitrogen and phosphorus removal system |
| CN102126817B (en) * | 2011-04-27 | 2013-05-29 | 天津市市政工程设计研究院 | AO high-efficiency nitrogen and phosphorus removal system |
| CN103435231A (en) * | 2013-09-05 | 2013-12-11 | 中国水电顾问集团中南勘测设计研究院 | Intensive nitrogen-phosphorus removing membrane biological reaction device and sewage treatment method |
| CN110498562A (en) * | 2019-08-08 | 2019-11-26 | 苏州苏净环保工程有限公司 | Treatment method of high-concentration stripping liquid wastewater |
| CN110498562B (en) * | 2019-08-08 | 2022-05-13 | 苏州苏净环保工程有限公司 | Treatment method of high-concentration stripping liquid wastewater |
| CN111606418A (en) * | 2020-04-28 | 2020-09-01 | 中国市政工程中南设计研究总院有限公司 | Subsection water inlet inversion A2O coupling multistage AO biological pond + MBR degree of depth nitrogen and phosphorus removal system |
| CN113816566A (en) * | 2021-10-12 | 2021-12-21 | 四川海天环保能源有限公司 | Urban sewage A2O-MBR combined nitrogen and phosphorus removal system |
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