CN102086061B - AOA (Angles-Of-Arrival) continuous flow biological nitrogen and phosphorus removal process for sewage treatment - Google Patents
AOA (Angles-Of-Arrival) continuous flow biological nitrogen and phosphorus removal process for sewage treatment Download PDFInfo
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Abstract
The invention relates to an AOA (Angles-Of-Arrival) continuous flow biological nitrogen and phosphorus removal process for sewage treatment, relating to a sewage treatment process and solving the problems of low efficiency, great operation energy consumption and great carbon source dosage of synchronous nitrogen and phosphorus removal existing in traditional sewage treatment. The process comprises the following steps that: (1) the yielding water of a primary sedimentation tank respectively enters an anaerobic tank and an aerobic tank and the mud of a secondary sedimentation tank is refluxed to the initial end of the anaerobic tank to form a muddy water mixture; and (2) the muddy water mixture enters the aerobic tank from the anaerobic tank in a flow-pushing mode, then enters an anoxic tank and finally enters the secondary sedimentation tank to precipitate and drain. The process provided by the invention comprises the series connection of anaerobism, aerobism and anaerobism, original intake shunted in two parts enters the anaerobic tank and the aerobic tank so that polyphosphate accumulating organisms accumulate a great amount of intracellular polymers by utilizing carbon source in the original intake, the exogenous denitrification and denitrification phosphorus removal of inner carbon sources can be realized in the subsequent anoxic tank, and the synchronous nitrogen and phosphorus removal efficiency is improved. The process does not adopt a digestive juice reflux unit, has lower operation energy consumption than a traditional process and saves the carbon source dosage.
Description
Technical field
The present invention relates to a kind of sewage treatment process.
Background technology
A
2Series of advantages such as/O (anaerobic-anoxic-aerobic) technology has simple structure, total hrt is short, the design and operation experience is ripe, the little and difficult generation sludge bulking of control complicacy; One of top-priority technology when being the design of municipal effluent denitrogenation dephosphorizing Sewage Plant, this technology also is one of most widely used synchronous denitrogen dephosphorus technology in present China municipal sewage plant.Predictably, do not having before better biological denitrification phosphorous removal technique occurs, domestic will be in one long period, still can be with A
2The municipal sewage plant of various scales is taken and design, built to/O technological principle as the leading factor; Shortcoming is the Digestive system return-flow system that exists operation energy consumption bigger.
A
2The principle of biological carbon and phosphorous removal and uncomplicated in/the O technology.Yet; Because this technology is single sludge system; That biological carbon and phosphorous removal relates to is nitrated, denitrification, release phosphorus and inhale a plurality of different biochemical reaction processes such as phosphorus; Wherein the principle of each process is different, and the requirement of its composition to mikrobe, matrix type and envrionment conditions also is not quite similar, and therefore will in a system, accomplish denitrogenation and dephosphorization process simultaneously; Inevitably can run into some contradictions and conflict, like carbon source, sludge age, nitrate salt, nitrification and denitrification capacity, release phosphorus and inhale problems such as phosphate capacity.These contradictions are reflected to A
2In/O the technology, can cause the decline of denitrogenation dephosphorizing efficient.At present low C/N ratio sewage is very common in China, and the shortage of carbon source can make A
2Originally the problem that exists in/O technology the denitrogenation dephosphorizing is more outstanding, and needs to add a large amount of carbon sources, has increased cost.
AOA-SBR (anaerobic-aerobic-anoxybiotic sequence batch () denitrifying phosphorus removal technique is a kind of new denitrifying phosphorus removal technique, still is in the starting stage about the research of this technology.This technology is divided into anaerobic-aerobic-anoxic operational mode with the cycle of operation of SBR technology; The Control essentials of this technology is need add a certain amount of organism in the aerobic cycle of operation to suppress aerobic suction phosphorus; The organism part that adds simultaneously can also change polyP bacteria intracellular polymer PHA into, thereby carries out denitrifying phosphorus uptake in the follow-up anoxic stage.
Summary of the invention
The present invention seeks to exist synchronous denitrification dephosphorizing efficient low in order to solve existing WWT, operation energy consumption is big, and the big problem of carbon source dosage, and a kind of AOA even flow biological denitrification phosphorous removal technique that is used for WWT is provided.
The AOA even flow biological denitrification phosphorous removal technique that is used for WWT carries out according to the following steps: one, the preliminary sedimentation tank water outlet is through the distributing well separated into two parts; Get into anaerobic pond and Aerobic Pond respectively; Second pond mud is back to anaerobic pond top through sludge reflux pump simultaneously, forms muddy water mixed solution; Two, muddy water mixed solution gets into Aerobic Pond by the plug-flow mode by anaerobic pond, gets into anoxic pond then, after hybrid reaction, gets into second pond, carries out sedimentation and drawing, promptly accomplishes AOA even flow biological carbon and phosphorous removal;
Wherein the distributing well separated into two parts is passed through in the preliminary sedimentation tank water outlet in the step 1; Get into anaerobic pond and Aerobic Pond respectively; Be that distributing well 6～7: 3～4 separated into two parts are by volume passed through in the preliminary sedimentation tank water outlet; Get into anaerobic pond and Aerobic Pond respectively through anaerobic pond intake pump and Aerobic Pond intake pump, the water inlet index is: COD=249.3mg/L, NH
4+-N=32.0mg/L, PO
4 3--P=6.16mg/L;
The reflux ratio of second pond mud is 50～100% in the step 1, and sludge age is 16～18d.
Advantage of the present invention: 1, technology is in series by anaerobic-aerobic-anoxic, and is simple in structure, and flow process is simple and direct, is beneficial to adopt A
2The transformation of the Sewage Plant of technologies such as/O;
2, technology does not have the Digestive system reflux unit, and the synchronous denitrogen dephosphorus technology that the energy consumption of operation is more traditional is low;
3, technology can realize the external source denitrification and utilize the denitrification dephosphorization process of internal carbon source in anoxic pond, has improved the utilising efficiency of carbon source in the raw waste water, thereby can save the dosage of the carbon source in the synchronous denitrification dephosphorizing process.
Synchronous denitrification dephosphorizing efficient is high among the present invention, and its COD clearance is 87.22%～88.20%, and the TN clearance is 69.94%～94.36%, PO
4 3--P clearance is 98.73%～99.6%, and the content of PHA is 70.72～83.64mg/L in the aerobic terminal mud.
Principle of the present invention: former water inlet divides two portions to get into the anaerobic and aerobic pond, and the organism in the preliminary sedimentation tank sewage of entering anaerobic pond is mainly used in the polyP bacteria anaerobic phosphorus release, absorbs the synthetic intracellular polymer PHA of organism in the sewage; The oxidized decomposition of an organism part in the preliminary sedimentation tank water outlet of entering Aerobic Pond; A part is absorbed synthetic PHA and suppresses aerobic suction phosphorus reaction by polyP bacteria; Few portion phosphate in the water can be absorbed by polyP bacteria under aerobic condition in addition; Make that most of phosphoric acid salt can get into anoxic pond in the water, carry out denitrification dephosphorization; Ammonia nitrogen in the water can be oxidized to nitric nitrogen under aerobic condition simultaneously; The denitrification phosphorus-collecting reaction can take place in sewage after Aerobic Pond gets into anoxic pond, promptly at cell interpolymer PHA, nitric nitrogen and PO
4 3-PolyP bacteria can utilize cell interpolymer PHA as electron donor under the situation about existing, and nitric nitrogen is inhaled phosphorus and anti-nitration reaction simultaneously as electron acceptor(EA).
Description of drawings
Fig. 1 is for being used for the principle schematic of the AOA even flow biological denitrification phosphorous removal technique of WWT in the embodiment one, wherein 1 representes preliminary sedimentation tank, 2 expression anaerobic zone intake pumps; 3 expression aerobic zone intake pumps, 4 expression anaerobic ponds, 5 expression anaerobic zone whisking appliances; 6 expression gas blowers, 7 expression Aerobic Ponds, 8 expression anoxic pond; 9 expression oxygen-starved area whisking appliances, 10 expression sludge reflux pumps, 11 expression second ponds.
Embodiment
Technical scheme of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: combine shown in Figure 1; The AOA even flow biological denitrification phosphorous removal technique that this embodiment is used for WWT carries out according to the following steps: one, the preliminary sedimentation tank water outlet is through the distributing well separated into two parts; Get into anaerobic pond 4 and Aerobic Pond 7 respectively; Second pond mud is back to anaerobic pond 4 tops through sludge reflux pump 10 simultaneously, forms muddy water mixed solution; Two, muddy water mixed solution is pressed the plug-flow mode and is got into Aerobic Pond 7 by anaerobic pond 4, gets into anoxic pond 8 then, after hybrid reaction, gets into second pond 11, carries out sedimentation and drawing, promptly accomplishes AOA even flow biological carbon and phosphorous removal;
Wherein the distributing well separated into two parts is passed through in the preliminary sedimentation tank water outlet in the step 1; Get into anaerobic pond 4 and Aerobic Pond 7 respectively; Be that distributing well 6～7: 3～4 separated into two parts are by volume passed through in the preliminary sedimentation tank water outlet; Get into anaerobic pond 4 and Aerobic Pond 7 respectively through anaerobic pond intake pump 2 and Aerobic Pond intake pump 3, the water inlet index is: COD=249.3mg/L, NH
4+-N=32.0mg/L, PO
4 3--P=6.16mg/L;
The reflux ratio of second pond mud is 50～100% in the step 1, and sludge age is 16～18d.
This embodiment is process object with the municipal effluent, mainly removes organism, nitrogen and phosphorus.
Mud in this embodiment in anaerobic pond 4 and the anoxic pond 8 is stirred to keep mud to be in suspended state by whisking appliance 5 and whisking appliance 9 respectively.
Mud backflow one cover backflow pipeline is only arranged, no digestive juice return-flow system in the present embodiment.
Organism in this embodiment in the preliminary sedimentation tank sewage of entering anaerobic pond 4 is mainly used in the polyP bacteria anaerobic phosphorus release, absorbs the synthetic intracellular polymer PHA of organism in the sewage; The oxidized decomposition of an organism part in the preliminary sedimentation tank water outlet of entering Aerobic Pond 7; A part is absorbed synthetic PHA and suppresses aerobic suction phosphorus reaction by polyP bacteria; Few portion phosphate in the water can be absorbed by polyP bacteria under aerobic condition in addition; Make that most of phosphoric acid salt can get into anoxic pond 8 in the water, carry out denitrification dephosphorization; Ammonia nitrogen in the water can be oxidized to nitric nitrogen under aerobic condition simultaneously; The denitrification phosphorus-collecting reaction can take place in sewage after Aerobic Pond 7 gets into anoxic pond 8, promptly at cell interpolymer PHA, nitric nitrogen and PO
4 3-PolyP bacteria can utilize cell interpolymer PHA as electron donor under the situation about existing, and nitric nitrogen is inhaled phosphorus and anti-nitration reaction simultaneously as electron acceptor(EA).
Embodiment two: this embodiment and embodiment one are different is that Aerobic Pond 7 is provided with micro porous aeration head and carries out aeration in the step 1, makes the mixed solution uniform mixing that fluctuates up and down, and dissolved oxygen concentration is 1.5mg/L.Other step and parameter are identical with embodiment one.
Embodiment three: this embodiment and embodiment one are different is that anaerobic pond 4 in the step 2, Aerobic Pond 7, anoxic pond 8 are all established the partition wall classification; Make it to form the plug-flow processing form; Close the title reaction zone, wherein anaerobic pond 4, Aerobic Pond 7, anoxic pond 8 are established 4,7,4 separations respectively, and volumetric ratio is 3: 4: 5; The reaction zone total hrt is 8h, and the temperature of reaction zone is 25～27 ℃.Other step and parameter are identical with embodiment one.
Embodiment four: the AOA even flow biological denitrification phosphorous removal technique that this embodiment is used for WWT carries out according to the following steps: one, the preliminary sedimentation tank water outlet is through the distributing well separated into two parts; Get into anaerobic pond 4 and Aerobic Pond 7 respectively; Second pond mud is back to anaerobic pond 4 tops through sludge reflux pump 10 simultaneously, forms muddy water mixed solution; Two, muddy water mixed solution is pressed the plug-flow mode and is got into Aerobic Pond 7 by anaerobic pond 4, gets into anoxic pond 8 then, after hybrid reaction, gets into second pond 11, carries out sedimentation and drawing, promptly accomplishes AOA even flow biological carbon and phosphorous removal;
Wherein the distributing well separated into two parts is passed through in the preliminary sedimentation tank water outlet in the step 1; Get into anaerobic pond 4 and Aerobic Pond 7 respectively; Be that the preliminary sedimentation tank water outlet is through 7: 3 by volume separated into two parts of distributing well; Get into anaerobic pond 4 and Aerobic Pond 7 respectively through anaerobic pond intake pump 2 and Aerobic Pond intake pump 3, the water inlet index is: COD=249.3mg/L, NH
4+-N=32.0mg/L, PO
4 3--P=6.16mg/L;
The reflux ratio of second pond mud is 75% in the step 1, and sludge age is 17d.
This embodiment COD clearance is 87.22%, and the TN clearance is 69.94%, PO
4 3--P clearance is 99.6%, and the content of PHA is 70.72mg/L in the aerobic terminal mud.
Embodiment five: the AOA even flow biological denitrification phosphorous removal technique that this embodiment is used for WWT carries out according to the following steps: one, the preliminary sedimentation tank water outlet is through the distributing well separated into two parts; Get into anaerobic pond 4 and Aerobic Pond 7 respectively; Second pond mud is back to anaerobic pond 4 tops through sludge reflux pump 10 simultaneously, forms muddy water mixed solution; Two, muddy water mixed solution is pressed the plug-flow mode and is got into Aerobic Pond 7 by anaerobic pond 4, gets into anoxic pond 8 then, after hybrid reaction, gets into second pond 11, carries out sedimentation and drawing, promptly accomplishes AOA even flow biological carbon and phosphorous removal;
Wherein the distributing well separated into two parts is passed through in the preliminary sedimentation tank water outlet in the step 1; Get into anaerobic pond 4 and Aerobic Pond 7 respectively; Be that the preliminary sedimentation tank water outlet is through 6: 4 by volume separated into two parts of distributing well; Get into anaerobic pond 4 and Aerobic Pond 7 respectively through anaerobic pond intake pump 2 and Aerobic Pond intake pump 3, the water inlet index is: COD=249.3mg/L, NH
4+-N=32.0mg/L, PO
4 3--P=6.16mg/L;
The reflux ratio of second pond mud is 95% in the step 1, and sludge age is 18d.
The COD clearance is 88.20% in this embodiment, and the TN clearance is 94.36%, PO
4 3--P clearance is 98.73%, and the content of PHA is 83.64mg/L in the aerobic terminal mud.
Claims (2)
1. AOA even flow biological denitrification phosphorous removal technique that is used for WWT; It is characterized in that the AOA even flow biological denitrification phosphorous removal technique that is used for WWT carries out according to the following steps: one, the preliminary sedimentation tank water outlet is through the distributing well separated into two parts; Get into anaerobic pond (4) and Aerobic Pond (7) respectively; Second pond mud is back to anaerobic pond (4) top through sludge reflux pump (10) simultaneously, forms muddy water mixed solution; Two, muddy water mixed solution is pressed the plug-flow mode and is got into Aerobic Pond (7) by anaerobic pond (4), gets into anoxic pond (8) then, after hybrid reaction, gets into second pond (11), carries out sedimentation and drawing, promptly accomplishes AOA even flow biological carbon and phosphorous removal;
Wherein the distributing well separated into two parts is passed through in the preliminary sedimentation tank water outlet in the step 1; Get into anaerobic pond (4) and Aerobic Pond (7) respectively; Be that distributing well 6～7: 3～4 separated into two parts are by volume passed through in the preliminary sedimentation tank water outlet; Get into anaerobic pond (4) and Aerobic Pond (7) respectively through anaerobic pond intake pump (2) and Aerobic Pond intake pump (3), the water inlet index is: COD=249.3mg/L, NH
4+-N=32.0mg/L, PO
4 3--P=6.16mg/L;
The reflux ratio of second pond mud is 50～100% in the step 1, and sludge age is 16～18d;
Anaerobic pond in the step 2 (4), Aerobic Pond (7), anoxic pond (8) are all established the partition wall classification; Make it to form the plug-flow processing form; Close the title reaction zone, wherein anaerobic pond (4), Aerobic Pond (7), anoxic pond (8) are established 4,7,4 separations respectively, and volumetric ratio is 3: 4: 5; The reaction zone total hrt is 8h, and the temperature of reaction zone is 25～27 ℃.
2. a kind of AOA even flow biological denitrification phosphorous removal technique that is used for WWT according to claim 1; It is characterized in that Aerobic Pond in the step 1 (7) is provided with micro porous aeration head and carries out aeration; Make the mixed solution uniform mixing that fluctuates up and down, dissolved oxygen concentration is 1.5mg/L.
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| CN102586154B (en) * | 2012-03-06 | 2013-06-05 | 北京大学 | Agrobacterium tumefaciens with nitrogen and phosphorus removal function and application thereof |
| CN106186315B (en) * | 2016-07-10 | 2019-02-19 | 北京工业大学 | A kind of apparatus and method of city domestic sewage continuous flow AOA advanced nitrogen dephosphorization |
| CN106673371A (en) * | 2017-01-12 | 2017-05-17 | 中国矿业大学 | Low-carbon source two-stage MBR (Membrane-Bioreactor) enhanced nitrogen and phosphorus removal method for city sewage |
| CN107055782A (en) * | 2017-04-05 | 2017-08-18 | 武汉理工大学 | A kind of efficient zero energy consumption AOA sewage-treatment plants and method |
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| CN106976975A (en) * | 2017-05-08 | 2017-07-25 | 中国矿业大学 | A kind of rearmounted anoxic strengthens the sewerage advanced treatment process of nitrogen phosphorus ligands |
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| SG10201807199WA (en) * | 2018-08-24 | 2019-09-27 | Scg Chemicals Co Ltd | Waste treatment device |
| CN110921833B (en) * | 2019-12-26 | 2021-09-24 | 暨南大学 | Sewage treatment system and method for strengthening anaerobic ammonia oxidation denitrification and phosphorus removal of domestic sewage |
| CN115093025A (en) * | 2022-06-23 | 2022-09-23 | 北京工业大学 | Control device and control method for realizing advanced denitrification of municipal sewage by short-cut nitrification treatment of continuous flow AOA (argon oxygen decarburization) process by adding hydroxylamine |
| CN116553725B (en) * | 2023-04-11 | 2023-12-15 | 深圳市水务(集团)有限公司 | AOA system and method for low-carbon-nitrogen-ratio urban sewage treatment |
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