CN105293699A - Method for performing denitrifying phosphorus removal through anaerobism-nitration-oxygen deprivation-nitration technology - Google Patents
Method for performing denitrifying phosphorus removal through anaerobism-nitration-oxygen deprivation-nitration technology Download PDFInfo
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- CN105293699A CN105293699A CN201510696901.3A CN201510696901A CN105293699A CN 105293699 A CN105293699 A CN 105293699A CN 201510696901 A CN201510696901 A CN 201510696901A CN 105293699 A CN105293699 A CN 105293699A
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Abstract
The invention provides a method for performing denitrifying phosphorus removal through an anaerobism-nitration-oxygen deprivation-nitration technology, and belongs to the technical field of municipal sewage treatment. Domestic sewage firstly enters an A2SBR reactor, and PHA and released phosphorus are stored in the anaerobic stage; static setting draining is performed, supernatant liquor rich in ammonia nitrogen enters an N-SBR reactor to complete a nitration reaction, and after the reaction is finished, nitrated liquor yielding water flows back to the A2SBR reactor to generate an oxygen deprivation denitrifying phosphorus removal reaction; after the reaction is finished, static setting is performed, and drained water enters the N-SBR reactor again to perform a nitration reaction of retained ammonia nitrogen; after the nitration reaction is finished, static setting is performed, and yielding water is drained out of a system. According to the method, a double sludge theory and a denitrifying phosphorus removal technique are applied, the new A2N2 technology which is operated according to the sequence of anaerobism, nitration, oxygen deprivation and nitration is represented, and through flexible control over the SBR reacting sequence, the problem that the ammonia nitrogen content is too high in yielding water of a traditional A2N technology is solved, and deep denitrification is achieved; meanwhile, carbon resources are saved, and the method is suitable for the current situation of the domestic sewage with the low C-N ratio in China.
Description
Technical field
The present invention relates to a kind of by anaerobism/nitrated/anoxic/nitrated (A
2n
2) technique carries out the method for denitrification dephosphorization, belong to technical field of sewage, be applicable to low C/N than city domestic sewage, dispersed domestic sewage in rural areas, and the field such as the newly-built Sewage Plant of application intermittent type SBR technique or old Sewage Plant upgrading.
Background technology
The emphasis of current water globe Pollution abatement has administered the research of the eutrophication problem turning to the nutritive elements such as nitrogen phosphorus to cause from simple Organic pollutants, the advanced nitrogen dephosphorization of sewage has become difficult point and core.China municipal wastewater C/N is general lower, often can not meet the needs of synchronous denitrification dephosphorizing, and traditional technology exists the sludge age contradiction of polyP bacteria and nitrifier, and the carbon source competition of polyP bacteria and heterotrophic bacterium, denitrogenation dephosphorizing efficiency is not high.The realization of Denitrifying Phosphorus Removal Technology is by gathering denitrifying polyP bacteria continuous under anaerobic/anoxic alternation condition, it can under anaerobic utilize VFAs in former water to synthesize internal carbon source PHA, and under anoxic conditions, be that PHA in electron acceptor(EA) oxygenolysis body completes excessive suction phosphorus reaction with nitrate, the COD consumption of 50% can be saved, the oxygen consumption of 30%, reduces by the sludge yield of 50%, is applicable to the low C/N of China than city domestic sewage present situation.
Traditional A
2nSBR technique adopts Denitrifying Phosphorus Removal Technology, and polyP bacteria is separated with nitrifier sludge age, and denitrification dephosphorization is respond well, but because operation scheme belongs to rear-mounted denitrification dephosphorization, part ammonia nitrogen, not through nitrated direct discharge, causing water outlet ammonia nitrogen concentration to exceed standard, bringing bottleneck to applying.For the rearmounted A of tradition
2n technique Problems existing, the present invention proposes the new A according to anaerobism/nitrated/anoxic/nitrated operation
2n
2technique, by the flexible control to sbr reactor sequential, solves traditional A
2the problem that N Process for Effluent ammonia nitrogen is too high, realizes advanced nitrogen dephosphorization.
Summary of the invention
The present invention is to provide a kind of by anaerobism/nitrated/anoxic/nitrated (A
2n
2) technique carries out the method for denitrification dephosphorization, problem, traditional A simultaneously such as this invention addresses the mud contradiction in age of polyP bacteria and nitrifier and carbon source is not enough
2the problem that N Process for Effluent ammonia nitrogen is too high, the synchronous degree of depth realizing nitrogen phosphorus is removed.
The present invention is to provide a kind of by anaerobism/nitrated/anoxic/nitrated (A
2n
2) technique carries out the method for denitrification dephosphorization, its device is primarily of anaerobic/anoxic reactor (A
2sBR), the composition such as nitrator (N-SBR), former water tank, intermediate water tank, reflux tank, A
2flco active sludge containing denitrification dephosphorization function in sbr reactor device, fills suspended biological filler in nitrator (N-SBR) reactor, enrichment and growth nitrifier on filler.
Carried out a device for denitrification dephosphorization advanced nitrogen by anaerobism/nitrated/anoxic/nitration processes, it is characterized in that comprising former water tank (1), A
2sBR intake pump (2), agitator (3), air pump (4), anaerobic/anoxic reactor A
2sBR (5), intermediate water tank (6), N-SBR intake pump (7), nitrator N-SBR (8), reflux tank (9) and reflux pump (10), suspended biological filler is filled in nitrator N-SBR, material is vinyon ring, and specific surface density is 450-500 ㎡/m
3, filler packing ratio is 30%-40%; Anaerobic/anoxic reactor A
2sBR (5) is connected to nitrator N-SBR (8) by intermediate water tank (6), N-SBR intake pump (7), and nitrator N-SBR (8) is connected to anaerobic/anoxic reactor A by reflux tank (9) and reflux pump (10)
2sBR (5).
Apply the method for described device, it is characterized in that, comprise the following steps:
1) sanitary sewage by former water tank (1) through A
2sBR intake pump (2) enters anaerobic/anoxic reactor A
2sBR (5), after water inlet end, agitator (3) starts to stir, and Denitrifying Phosphate Accumulating Organisms utilizes the VFAs in former water to synthesize internal carbon source PHA, is discharged into external by the phosphoric acid salt in body simultaneously; This stage control A
2dO≤0.02mg/L, ORP=-150 ~-220mv, pH=6.5-7.3 in sbr reactor device, water-filling than 0.7, reaction times 1.5-2h; The reaction of anaerobism section terminates rear Jing Chenpaishui, and the supernatant liquor being rich in ammonia nitrogen enters intermediate water tank (6);
2) nitrator N-SBR (8) will be rich in the supernatant liquor suction reactor of ammonia nitrogen by N-SBR intake pump (7) in intermediate water tank (6), water-filling is than 0.7, air pump (4) is opened aeration and is carried out aerobic nitrification, control DO=3-4mg/L, aeration 2-3h, nitrated complete after, nitrified effluent is disposed to reflux tank (9);
3) anaerobic/anoxic reactor A
2sBR (5) injects the backflow nitrification liquid from reflux tank (9) by reflux pump (10), turn on agitator (3), Denitrifying Phosphate Accumulating Organisms with the nitric nitrogen wherein contained for electron acceptor(EA), using the PHA of anaerobic stages storage as electron donor, there is anoxic denitrification except phosphorus reaction; Reaction times 3-4h, control DO≤0.2mg/L, ORP=-150 ~-220mv, staticly settle after reacting completely, the supernatant liquor containing part ammonia nitrogen enters intermediate water tank (6) again, and draining is than 0.7, now spoil disposal, controlling sludge age is 12 days, sludge concentration 3000-3500mg/L;
4) the residue ammonia nitrogen contained in intermediate water tank (6) enters N-SBR reactor (8) again by N-SBR intake pump (7), water-filling is than 0.7, open aeration remaining ammonia nitrogen is removed by aerobic nitrification, control DO=3-4mg/L, after aeration 1h, standard water discharge discharges system.
Control A
2the sludge age of SBR system is 12 days, A
2sBR runs under short mud condition in age, is conducive to dephosphorization and denitrification, on the suspended biological filler that the nitrifier apposition growth sludge age in N-SBR reactor is longer, is conducive to nitrated.
The present invention is to provide a kind of by anaerobism/nitrated/anoxic/nitrated (A
2n
2) technique carries out the method for denitrification dephosphorization, has following 4 advantages:
(1) denitrification dephosphorization is by " carbon is dual-purpose " synchronous denitrification dephosphorizing, saves carbon source and the energy, improves former water utilization of carbon source rate.
(2) this technique belongs to two sludge system, can create the optimal environmental condition being applicable to polyP bacteria and the various growth of nitrifier respectively, provide optimum operating condition.
(3) on the suspended biological filler that the nitrifier apposition growth sludge age in N-SBR reactor is longer, be conducive to nitrated, improve the problem of anti-shock loading and the nitrated difference of low temperature.
(4) traditional A is solved
2the problem that N Process for Effluent ammonia nitrogen is too high, realizes advanced nitrogen dephosphorization, for full-scale application provides theory and technology to instruct.
Accompanying drawing explanation
Fig. 1 is the device of denitrifying phosphorus removal technique, and Fig. 2 is the operation sequential chart of one-period
In Fig. 1: the former water tank of 1-; 2-A
2sBR intake pump; 3-agitator; 4-air pump; 5-A
2sbr reactor device; 6-intermediate water tank; 7-N-SBR intake pump; 8-N-SBR reactor; 9-reflux tank; 10-reflux pump
Embodiment
Composition graphs 1,2 describes embodiment of the present invention in detail
1) sanitary sewage by former water tank (1) through A
2sBR intake pump (2) enters A
2sbr reactor device (5), after water inlet end, agitator (3) starts to stir, and Denitrifying Phosphate Accumulating Organisms utilizes the VFAs in former water to synthesize internal carbon source PHA, is discharged into external by the phosphoric acid salt in body simultaneously.This stage control A
2dO≤0.02mg/L, ORP=-150 ~-220mv, pH=6.5-7.3 in sbr reactor device, water-filling than 0.7, reaction times 1.5-2h.In this process, most COD is removed, and the reaction of anaerobism section terminates rear Jing Chenpaishui, and the supernatant liquor being rich in ammonia nitrogen enters intermediate water tank (6).
2) N-SBR reactor (8) will be rich in the supernatant liquor suction reactor of ammonia nitrogen by N-SBR intake pump (7) in intermediate water tank (6), water-filling is than 0.7, air pump (4) is opened aeration and is carried out aerobic nitrification, control DO=3-4mg/L, aeration 2-3h, nitrated complete after, nitrified effluent is disposed to reflux tank (9).
3) A2SBR reactor (5) is by the backflow nitrification liquid of reflux pump (10) injection from reflux tank (9), turn on agitator (3), Denitrifying Phosphate Accumulating Organisms with the nitric nitrogen wherein contained for electron acceptor(EA), using the PHA of anaerobic stages storage as electron donor, anoxic denitrification occurs except phosphorus reaction, in this process, most of nitric nitrogen and phosphorus are removed.Reaction times 3-4h, control DO≤0.2mg/L, ORP=-150 ~-220mv, staticly settle after reacting completely, the supernatant liquor containing part ammonia nitrogen enters intermediate water tank (6) again, and draining is than 0.7, now spoil disposal, controlling sludge age is 12 days, sludge concentration 3000-3500mg/L.
4) the residue ammonia nitrogen contained in intermediate water tank (6) enters N-SBR reactor (8) again by N-SBR intake pump (7), water-filling is than 0.7, open aeration remaining ammonia nitrogen is removed by aerobic nitrification, control DO=3-4mg/L, aeration 1h, after nitration reaction, standard water discharge discharges system.
The sludge age of control A2SBR system is 12 days, A
2sBR runs under short mud condition in age, is conducive to dephosphorization and denitrification, on the suspended biological filler that the nitrifier apposition growth sludge age in N-SBR reactor is longer, is conducive to nitrated
We for research object, investigate feasibility of the present invention with Beijing area colleges and universities dependents' district septic tank sanitary sewage.Experimental session Inlet and outlet water water quality and operating parameter following (mean value):
Experimental session water outlet COD, NH
3-N, NO
3 -the index clearances such as N, TN, TP are very high, and effluent quality is all stable reaches country-level A standard.
Above content is the further description done the present invention in conjunction with concrete experiment embodiment; be convenient to these those skilled in the art understand and apply the invention better; can not think that specific embodiment of the invention is only limited to these and illustrates, therefore the simple modifications done the present invention of these those skilled in the art is all within scope.
Claims (2)
1. carried out a device for denitrification dephosphorization advanced nitrogen by anaerobism/nitrated/anoxic/nitration processes, it is characterized in that comprising former water tank (1), A
2sBR intake pump (2), agitator (3), air pump (4), anaerobic/anoxic reactor A
2sBR (5), intermediate water tank (6), N-SBR intake pump (7), nitrator N-SBR (8), reflux tank (9) and reflux pump (10), suspended biological filler is filled in nitrator N-SBR, material is vinyon ring, and specific surface density is 450-500 ㎡/m
3, filler packing ratio is 30%-40%; Anaerobic/anoxic reactor A
2sBR (5) is connected to nitrator N-SBR (8) by intermediate water tank (6), N-SBR intake pump (7), and nitrator N-SBR (8) is connected to anaerobic/anoxic reactor A by reflux tank (9) and reflux pump (10)
2sBR (5).
2. apply the method for device as claimed in claim 1, it is characterized in that, comprise the following steps:
1) sanitary sewage by former water tank (1) through A
2sBR intake pump (2) enters anaerobic/anoxic reactor A
2sBR (5), after water inlet end, agitator (3) starts to stir, and Denitrifying Phosphate Accumulating Organisms utilizes the VFAs in former water to synthesize internal carbon source PHA, is discharged into external by the phosphoric acid salt in body simultaneously; This stage control A
2dO≤0.02mg/L, ORP=-150 ~-220mv, pH=6.5-7.3 in sbr reactor device, water-filling than 0.7, reaction times 1.5-2h; The reaction of anaerobism section terminates rear Jing Chenpaishui, and the supernatant liquor being rich in ammonia nitrogen enters intermediate water tank (6);
2) nitrator N-SBR (8) will be rich in the supernatant liquor suction reactor of ammonia nitrogen by N-SBR intake pump (7) in intermediate water tank (6), water-filling is than 0.7, air pump (4) is opened aeration and is carried out aerobic nitrification, control DO=3-4mg/L, aeration 2-3h, nitrated complete after, nitrified effluent is disposed to reflux tank (9);
3) anaerobic/anoxic reactor A
2sBR (5) injects the backflow nitrification liquid from reflux tank (9) by reflux pump (10), turn on agitator (3), Denitrifying Phosphate Accumulating Organisms with the nitric nitrogen wherein contained for electron acceptor(EA), using the PHA of anaerobic stages storage as electron donor, there is anoxic denitrification except phosphorus reaction; Reaction times 3-4h, control DO≤0.2mg/L, ORP=-150 ~-220mv, staticly settle after reacting completely, the supernatant liquor containing part ammonia nitrogen enters intermediate water tank (6) again, and draining is than 0.7, now spoil disposal, controlling sludge age is 12 days, sludge concentration 3000-3500mg/L;
4) the residue ammonia nitrogen contained in intermediate water tank (6) enters N-SBR reactor (8) again by N-SBR intake pump (7), water-filling is than 0.7, open aeration remaining ammonia nitrogen is removed by aerobic nitrification, control DO=3-4mg/L, after aeration 1h, standard water discharge discharges system.
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Cited By (4)
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| CN105753156A (en) * | 2016-03-25 | 2016-07-13 | 重庆大学 | High-standard nitrogen and phosphorus removal method for municipal wastewater |
| CN106830326A (en) * | 2017-03-23 | 2017-06-13 | 扬州大学 | A kind of A2The advanced nitrogen dephosphorization process of N SBR modified sewage |
| CN114477455A (en) * | 2022-03-14 | 2022-05-13 | 郑州大学 | Low-carbon and high-efficiency method for deep nitrogen and phosphorus removal of municipal sewage |
| CN115571981A (en) * | 2022-09-29 | 2023-01-06 | 吉林建筑科技学院 | Improved A 2 NSBR double-mud denitrification dephosphorization process method |
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Cited By (6)
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| CN114477455A (en) * | 2022-03-14 | 2022-05-13 | 郑州大学 | Low-carbon and high-efficiency method for deep nitrogen and phosphorus removal of municipal sewage |
| CN114477455B (en) * | 2022-03-14 | 2023-04-07 | 郑州大学 | Low-carbon and high-efficiency method for deep nitrogen and phosphorus removal of municipal sewage |
| CN115571981A (en) * | 2022-09-29 | 2023-01-06 | 吉林建筑科技学院 | Improved A 2 NSBR double-mud denitrification dephosphorization process method |
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