CN103739163A - Device and method for improving A2NSBR denitrifying phosphorus removal technology - Google Patents
Device and method for improving A2NSBR denitrifying phosphorus removal technology Download PDFInfo
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- CN103739163A CN103739163A CN201310746625.8A CN201310746625A CN103739163A CN 103739163 A CN103739163 A CN 103739163A CN 201310746625 A CN201310746625 A CN 201310746625A CN 103739163 A CN103739163 A CN 103739163A
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Abstract
The invention relates to a device and a method for improving A2NSBR denitrifying phosphorus removal technology, and belongs to the technical field of municipal wastewater treatment. The device mainly comprises an (A/A/O)-SBR reactor and an N-SBR reactor. The method comprises the following steps: firstly allowing domestic wastewater to enter the (A/A/O)-SBR reactor to absorb carbon so as to synthesize PHA and release phosphorus in anaerobic phase, then injecting nitration reflux liquid from N-SBR for aerobic denitrifying phosphorus removal, after completely reacting, aerating for a short time to absorb left phosphorus and blow off the nitrogen, after reaction, standing and precipitating, draining away water into the N-SBR reactor for aerobic aeration for nitration reaction, after nitration reaction, standing and precipitating, back flowing part of the supernate to the anaerobic phase of the (A/A/O)-SBR reactor, discharging the other part of the supernate, wherein the discharged volume is equal to initial water inflow of the system. According to the device and the method, the contradiction of sludge age between the phosphorus-accumulating bacteria and nitrifying bacteria is resolved, the carbon source is saved, and the method and device are suitable for domestic wastewater with low C/N (carbon/nitrogen) ratio, and can be used for synchronously removing nitrogen and phosphorus deeply.
Description
Technical field
The present invention relates to a kind of improvement A
2the apparatus and method of NSBR denitrifying phosphorus removal technique, belong to technical field of sewage, are applicable to the fields such as newly-built Sewage Plant or old Sewage Plant upgrading, municipal sanitary sewage and trade effluent and dispersed domestic sewage in rural areas by using.
Background technology
At present water globe Pollution abatement aspect, Organic pollutants are effectively controlled, nitrogen phosphorus etc., and eutrophication that nutritive element causes becomes the problem that people pay close attention to most, is also the Focal point and difficult point of water pollution control.The biological treatment of sewage is widely used in various sewage disposals, but due to low C/N ratio, and the reason such as the mud contradiction in age of nitrifier and polyP bacteria, and traditional sewage treatment process and technology are difficult to the advanced nitrogen dephosphorization that reaches synchronous.
The proposition of denitrification dephosphorization theory and technology thereof and development, for having opened up new method and thinking in the biological carbon and phosphorous removal field of sewage, denitrogenation and dephosphorization can synchronously be removed in same reactor, solved low C/N than the problem of sanitary sewage carbon source deficiency.The realization of Denitrifying Phosphorus Removal Technology is by continuous enrichment DPAOs under anaerobic/anoxic alternation condition, it can under anaerobic utilize the synthetic internal carbon source PHA of VFAs in former water, and under anoxia condition, the PHA take nitrate in electron acceptor(EA) oxygenolysis body completes excessive suction phosphorus reaction.
Summary of the invention
The present invention is to provide a kind of improvement A
2the apparatus and method of NSBR denitrifying phosphorus removal technique, this invention has solved the problems such as the mud contradiction in age of polyP bacteria and nitrifier and carbon source deficiency, realizes the synchronous degree of depth of nitrogen phosphorus simultaneously and removes.
The present invention is to provide a kind of improvement A
2the device of NSBR denitrifying phosphorus removal technique, is mainly comprised of former water tank (1), (A/A/O)-sbr reactor device (2), N-SBR reactor (3).It is characterized in that former water tank (1) is connected with (A/A/O)-sbr reactor device (2) by raw water pump (4), (A/A/O)-sbr reactor device (2) water outlet is connected with N-SBR reactor (3) by N-SBR intake pump (5), N-SBR reactor (3) effluent recycling is connected with (A/A/O)-sbr reactor device (2) by reflux pump (6), air pump (10) is connected with (A/A/O)-sbr reactor device (2) by gas meter (14), and air pump (11) is connected with N-SBR reactor (3) by gas meter (15).
Apply described a kind of improvement A
2the method of the device of NSBR denitrifying phosphorus removal technique, the method comprises the following steps:
(1) sanitary sewage enters (A/A/O)-sbr reactor device (2) by former water tank (1) through raw water pump (4), after water inlet end, agitator (12) starts to stir, DPAOS utilizes the synthetic internal carbon source PHA of the VFAs in former water, releases phosphorus simultaneously, controls ORP=-30～-240mv, DO≤0.2mg/L, water-filling is than 0.2, reaction times 1.5-2h, and in this process, most COD is removed.
(2) after the reaction of anaerobism section finishes, by reflux pump (6), inject the backflow nitrification liquid from N-SBR reactor (3), DPAOs is take the nitric nitrogen that wherein contains as electron acceptor(EA), as electron donor, there is anoxic denitrification except phosphorus reaction in the PHA storing using anaerobic stages, controls ORP=-90～-210mv, DO≤0.2mg/L, water-filling is than 0.4, reaction times 4-5h, and in this process, most of nitric nitrogen and phosphorus are removed.
(3) after anoxic section reaction finishes, air pump (10) is opened, and by gas meter (14) adjusting gas flow, carries out of short duration aeration, controls DO=2-3mg/L, and reaction times 30min completes the nitrogen that the absorption of phosphoric residue and stripping denitrification stage produce.
(4) after aeration finishes, close air pump (10), carry out mud-water separation after quiescent setting 30min, supernatant liquor proceeds to N-SBR reactor by N-SBR intake pump (5), and spoil disposal simultaneously, controls mud 10-15d in age, sludge concentration 2800-4000mg/L.
(5) air pump (11) is opened, by gas meter (15), regulate aeration rate, control DO=2-4mg/L, aeration time 3-4h, nitrifier in N-SBR reactor is oxidized to nitric nitrogen at the condition decline ammonia nitrogen of aerobic aeration, after reaction finishes, a supernatant liquor part (draining is than 0.4) is injected (the A/A/O)-sbr reactor device anoxic stage by reflux pump (6) provides nitric nitrogen for its denitrification dephosphorization, a part (draining is than 0.2) is by water discharge valve (7) discharge, spoil disposal simultaneously, control sludge age 15-25d, sludge concentration 2800-4000mg/L.
The sludge age that wherein passes through to control (A/A/O)-SBR is at 10-15d, the nitrifier that mud is grown age is eluriated, control the sludge age of N-SBR reactor at 15-25d, this measure has solved the mud battle in age of polyP bacteria and nitrifier, (A/A/O)-SBR moves under short mud condition in age, is conducive to dephosphorization and denitrification, and N-SBR reactor moves under long mud condition in age, be conducive to nitratedly, and provide sufficient electron acceptor(EA) for anoxic denitrification dephosphorization stage of (A/A/O)-SBR.
The present invention is to provide a kind of improvement A
2the apparatus and method of NSBR denitrifying phosphorus removal technique, have following 5 advantages:
(1) denitrification dephosphorization is realized " carbon is dual-purpose ", saves carbon source, is applicable to low C/N and compares sanitary sewage
(2) create polyP bacteria and nitrifier optimum growh environment separately, be conducive to advanced nitrogen dephosphorization
(3) poly-phosphorus sludge is granule sludge, and settling property is good, and mud-water separation is effective
(4) sbr reactor device operation scheme is flexible, is conducive to real-time process control.
(5) system stability is good, anti-shock loading, and effluent quality is good
Accompanying drawing explanation
Fig. 1 is the device of denitrifying phosphorus removal technique, and Fig. 2 is denitrifying phosphorus removal technique flow process, and Fig. 3 is one-period operational mode figure
In Fig. 1: the former water tank of 1-; 2-A A O-SBR; 3-N-SBR; 4-raw water pump; 5-N-SBR intake pump; 6-reflux pump; 7-water discharge valve; 8-mud valve; 9-mud valve; 10-air pump; 11-air pump; 12-agitator; 13-biologic packing material; 14-gas meter; 15-gas meter; 16-pH on-line monitoring instrument; 17-DO on-line monitoring instrument; 18-ORP on-line monitoring instrument
Embodiment
In conjunction with Fig. 1,2,3, describe embodiment of the present invention in detail
(1) sanitary sewage enters (A/A/O)-sbr reactor device (2) by former water tank (1) through raw water pump (4), after water inlet end, agitator (12) starts to stir, DPAOS utilizes the synthetic internal carbon source PHA of the VFAs in former water, releases phosphorus simultaneously, controls ORP=-30～-240mv, DO≤0.2mg/L, water-filling is than 0.2, reaction times 1.5-2h, and in this process, most COD is removed.
(2) after the reaction of anaerobism section finishes, by reflux pump (6), inject the backflow nitrification liquid from N-SBR reactor (3), DPAOs is take the nitric nitrogen that wherein contains as electron acceptor(EA), as electron donor, there is anoxic denitrification except phosphorus reaction in the PHA storing using anaerobic stages, controls ORP=-90～-210mv, DO≤0.2mg/L, water-filling is than 0.4, reaction times 4-5h, and in this process, most of nitric nitrogen and phosphorus are removed.
(3) after anoxic section reaction finishes, air pump (10) is opened, and by gas meter (14) adjusting gas flow, carries out of short duration aeration, controls DO=2-3mg/L, and reaction times 30min completes the nitrogen that the absorption of phosphoric residue and stripping denitrification stage produce.
(4) after aeration finishes, close air pump (10), carry out mud-water separation after quiescent setting 30min, supernatant liquor proceeds to N-SBR reactor by N-SBR intake pump (5), and spoil disposal simultaneously, controls mud 10-15d in age, sludge concentration 2800-4000mg/L.
(5) air pump (11) is opened, by gas meter (15), regulate aeration rate, control DO=2-4mg/L, aeration time 3-4h, nitrifier in N-SBR reactor is oxidized to nitric nitrogen at the condition decline ammonia nitrogen of aerobic aeration, after reaction finishes, a supernatant liquor part (draining is than 0.4) is injected (the A/A/O)-sbr reactor device anoxic stage by reflux pump (6) provides nitric nitrogen for its denitrification dephosphorization, a part (draining is than 0.2) is by water discharge valve (7) discharge, spoil disposal simultaneously, control sludge age 15-25d, sludge concentration 2800-4000mg/L.
The sludge age that wherein passes through to control (A/A/O)-SBR is at 10-15d, the nitrifier that mud is grown age is eluriated, control the sludge age of N-SBR reactor at 15-25d, this measure has solved the mud battle in age of polyP bacteria and nitrifier, (A/A/O)-SBR moves under short mud condition in age, is conducive to dephosphorization and denitrification, and N-SBR reactor moves under long mud condition in age, be conducive to nitratedly, and provide sufficient electron acceptor(EA) for anoxic denitrification dephosphorization stage of (A/A/O)-SBR.
Take Certain University in Beijing dependents' district sanitary sewage as handling object, investigated the denitrogenation dephosphorizing performance of this system.
Experimental session Inlet and outlet water water quality and operating parameter following (mean value)
| Project name | COD | NH 3-N | NO 3 - | TP |
| Influent quality | 302.3 | 57.85 | 0.56 | 5.97 |
| Effluent quality | 37.48 | 0.46 | 13.84 | 0.23 |
| Clearance (%) | 87.6% | 99.2% | — | 83.3% |
One-period operating parameter (illustrating):
(A/A/O)-SBR(useful volume 10L)
| Project name | Anaerobism | Anoxic | Aerobic | Quiet heavy |
| Reaction times (h) | 2 | 4 | 0.5 | 0.5 |
| Water inlet (L) | 2 | ? | ? | ? |
| Nitrification liquid backflow (L) | ? | 4 | ? | ? |
| Draining | ? | ? | ? | 6 |
| DO（mg/L） | ≤0.2 | ≤0.2 | 2-3 | ? |
| ORP | -300～-100 | -250～-60 | 10～40 | ? |
N-SBR(useful volume 10L)
| Project name | Aerobic | Quiet heavy | Idle |
| Reaction times (h) | 3 | 0.5 | 3.5 |
| Water inlet (L) | 6 | ? | ? |
| Nitrification liquid backflow (L) | ? | 4 | ? |
[0036]?
| Draining | ? | 2 | ? |
| DO（mg/L） | 2-4 | ? | ? |
Under this operating parameter, water outlet COD, NH
3-N, NO
3the technical indicators such as-N, TN, TP are all stablized the country-level A standard that reaches.
Above content is the further description of the present invention being done in conjunction with concrete experiment embodiment; being convenient to these those skilled in the art understands and applies the invention better; can not think that specific embodiment of the invention is only limited to these explanations, the simple modifications that therefore these those skilled in the art do the present invention is all within protection domain of the present invention.
Claims (2)
1. an improvement A
2the device of NSBR denitrifying phosphorus removal technique, it is characterized in that comprising former water tank (1), (A/A/O)-sbr reactor device (2), N-SBR reactor (3), former water tank (1) is connected with (A/A/O)-sbr reactor device (2) by raw water pump (4), (A/A/O)-sbr reactor device (2) water outlet is connected with N-SBR reactor (3) by N-SBR intake pump (5), N-SBR reactor (3) effluent recycling is connected with (A/A/O)-sbr reactor device (2) by reflux pump (6), air pump (10) is connected with (A/A/O)-sbr reactor device (2) by gas meter (14), air pump (11) is connected with N-SBR reactor (3) by gas meter (15).
2. application rights requires the improvement A described in 1
2the method of the device of NSBR denitrifying phosphorus removal technique, is characterized in that, comprises the following steps:
(1) sanitary sewage enters (A/A/O)-sbr reactor device (2) by former water tank (1) through raw water pump (4), after water inlet end, agitator (12) starts to stir, DPAOS utilizes the synthetic internal carbon source PHA of the VFAs in former water, release phosphorus simultaneously, control ORP=-30～-240mv, DO≤0.2mg/L, water-filling is than 0.2, reaction times 1.5-2h;
(2) after the reaction of anaerobism section finishes, by reflux pump (6), inject the backflow nitrification liquid from N-SBR reactor (3), DPAOs is take the nitric nitrogen that wherein contains as electron acceptor(EA), the PHA storing using anaerobic stages is as electron donor, there is anoxic denitrification except phosphorus reaction, control ORP=-90～-210mv, DO≤0.2mg/L, water-filling is than 0.4, reaction times 4-5h;
(3) after anoxic section reaction finishes, air pump (10) is opened, and by gas meter (14) adjusting gas flow, carries out of short duration aeration, controls DO=2-3mg/L, and reaction times 30min completes the nitrogen that the absorption of phosphoric residue and stripping denitrification stage produce;
(4) after aeration finishes, close air pump (10), carry out mud-water separation after quiescent setting 30min, supernatant liquor proceeds to N-SBR reactor by N-SBR intake pump (5), and spoil disposal simultaneously, controls mud 10-15d in age, sludge concentration 2800-4000mg/L;
(5) air pump (11) is opened, by gas meter (15), regulate aeration rate, control DO=2-4mg/L, aeration time 3-4h, nitrifier in N-SBR reactor is oxidized to nitric nitrogen at the condition decline ammonia nitrogen of aerobic aeration, after reaction finishes, a supernatant liquor part, its draining ratio is 0.4, the anoxic stage of injecting (A/A/O)-sbr reactor device by reflux pump (6) provides nitric nitrogen for its denitrification dephosphorization, supernatant liquor another part, draining ratio is 0.2, by water discharge valve (7), discharge, spoil disposal simultaneously, control sludge age 15-25d, sludge concentration 2800-4000mg/L.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104817179A (en) * | 2015-05-17 | 2015-08-05 | 北京工业大学 | Device and method for synchronous denitrifying phosphorus removal and phosphorus recovery |
| CN105084541A (en) * | 2015-08-19 | 2015-11-25 | 安徽科技学院 | New process of sewage treatment |
| CN106145346A (en) * | 2015-04-13 | 2016-11-23 | 湖南大学 | A kind of sewage-treatment plant being enriched with poly-hydroxy fatty acid synchronous denitrification dephosphorizing and technique |
| 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 |
| CN108585201A (en) * | 2018-05-04 | 2018-09-28 | 北京工业大学 | One kind being based on DEAMOX technique improvements A2The device and method of NSBR double sludge denitrification denitrification dephosphorization techniques |
| CN109665668A (en) * | 2019-01-09 | 2019-04-23 | 广州嘉康环保技术有限公司 | A kind of aquaculture wastewater biochemistry dephosphorization process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145346A (en) * | 2015-04-13 | 2016-11-23 | 湖南大学 | A kind of sewage-treatment plant being enriched with poly-hydroxy fatty acid synchronous denitrification dephosphorizing and technique |
| CN104817179A (en) * | 2015-05-17 | 2015-08-05 | 北京工业大学 | Device and method for synchronous denitrifying phosphorus removal and phosphorus recovery |
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| CN108585201A (en) * | 2018-05-04 | 2018-09-28 | 北京工业大学 | One kind being based on DEAMOX technique improvements A2The device and method of NSBR double sludge denitrification denitrification dephosphorization techniques |
| CN109665668A (en) * | 2019-01-09 | 2019-04-23 | 广州嘉康环保技术有限公司 | A kind of aquaculture wastewater biochemistry dephosphorization process |
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