CN103739163B - 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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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 newly-built Sewage Plant or old Sewage Plant upgrading, municipal sanitary sewage and the field such as trade effluent and dispersed domestic sewage in rural areas.
Background technology
Current water globe Pollution abatement aspect, the eutrophication that the nutritive elements such as Organic pollutants are effectively controlled, nitrogen phosphorus cause 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 disposal, 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 reach synchronous advanced nitrogen dephosphorization.
The proposition of denitrification dephosphorization theory and technology thereof and development, for the biological carbon and phosphorous removal field of sewage opens new method and thinking, denitrogenation and dephosphorization synchronously can be removed in same reactor, solve the problem of low C/N than sanitary sewage carbon source deficiency.The realization of Denitrifying Phosphorus Removal Technology is by enrichment DPAOs 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 the PHA in electron acceptor(EA) oxygenolysis body completes excessive suction phosphorus reaction with nitrate.
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, the problem such as this invention addresses the mud contradiction in age of polyP bacteria and nitrifier and carbon source is not enough, the synchronous degree of depth simultaneously realizing nitrogen phosphorus is removed.
The present invention is to provide a kind of improvement A
2the device of NSBR denitrifying phosphorus removal technique, primarily of former water tank (1), A/A/O-SBR reactor (2), N-SBR reactor (3) composition.It is characterized in that former water tank (1) is connected with A/A/O-SBR reactor (2) by raw water pump (4), A/A/O-SBR reactor (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 (2) by reflux pump (6), first air pump (10) is connected with A/A/O-SBR reactor (2) by the first gas meter (14), second air pump (11) is connected with N-SBR reactor (3) by the second gas meter (15).
Apply described one improvement A
2the method of the device of NSBR denitrifying phosphorus removal technique, the method comprises the following steps:
(1) sanitary sewage by former water tank (1) through raw water pump (4) enter A/A/O ?sbr reactor device (2), after water inlet end, agitator (12) starts to stir, DPAOS utilizes VFAs in former water to synthesize internal carbon source PHA, releases phosphorus simultaneously, control ORP=?30～?240mv, DO≤0.2mg/L, water-filling than 0.2, reaction times 1.5 ?2h, in this process, most COD is removed.
(2) after the reaction of anaerobism section terminates, by reflux pump (6) inject from N ?the backflow nitrification liquid of sbr reactor device (3), DPAOS 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, control ORP=?90 ~ ?210mv, DO≤0.2mg/L, water-filling than 0.4, reaction times 4 ?5h, in this process, most of nitric nitrogen and phosphorus are removed.
(3) after the reaction of anoxic section terminates, first air pump (10) is opened, of short duration aeration is carried out by the first gas meter (14) adjusting gas flow, control DO=2 ?3mg/L, reaction times 30min, completes the absorption of phosphoric residue and the nitrogen of stripping denitrification stage generation.
(4), after aeration terminates, close the first air pump (10), after quiescent setting 30min, carry out mud-water separation, supernatant liquor by N ?SBR intake pump (5) proceed to N ?sbr reactor device, simultaneously spoil disposal, control mud age 10 ?15d, sludge concentration 2800 ?4000mg/L.
(5) second air pumps (11) are opened, aeration rate is regulated by the second gas meter (15), control DO=2 ?4mg/L, aeration time 3 ?4h, N ?nitrifier in sbr reactor device be nitric nitrogen at the condition decline ammonium oxidation of aerobic aeration, after reaction terminates, a supernatant liquor part (draining is than 0.4) by reflux pump (6) inject A/A/O ?the anoxic phases of sbr reactor device provide nitric nitrogen for its denitrification dephosphorization, a part (draining is than 0.2) is discharged by water discharge valve (7), spoil disposal simultaneously, control sludge age 15 ?25d, sludge concentration 2800 ?4000mg/L.
Wherein pass through the sludge age of control A/A/O-SBR at 10-15d, the nitrifier longer mud age is eluriated, the sludge age of control N-SBR reactor is at 15-25d, this measure solves the mud battle in age of polyP bacteria and nitrifier, A/A/O-SBR runs under short mud condition in age, is conducive to dephosphorization and denitrification, and N-SBR reactor runs under long mud condition in age, be conducive to nitrated, 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 realizes " 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 planning.
(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-first air pump; 11-second air pump; 12-agitator; 13-biologic packing material; 14-first gas meter; 15-second gas meter; 16-pH on-line computing model; 17-DO on-line computing model; 18-ORP on-line computing model
Embodiment
Composition graphs 1,2,3 describes embodiment of the present invention in detail
(1) sanitary sewage by former water tank (1) through raw water pump (4) enter A/A/O ?sbr reactor device (2), after water inlet end, agitator (12) starts to stir, DPAOS utilizes VFAs in former water to synthesize internal carbon source PHA, releases phosphorus simultaneously, control ORP=?30～?240mv, DO≤0.2mg/L, water-filling than 0.2, reaction times 1.5 ?2h, in this process, most COD is removed.
(2) after the reaction of anaerobism section terminates, by reflux pump (6) inject from N ?the backflow nitrification liquid of sbr reactor device (3), DPAOs 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, control ORP=?90 ~ ?210mv, DO≤0.2mg/L, water-filling than 0.4, reaction times 4 ?5h, in this process, most of nitric nitrogen and phosphorus are removed.
(3) after the reaction of anoxic section terminates, first air pump (10) is opened, of short duration aeration is carried out by the first gas meter (14) adjusting gas flow, control DO=2 ?3mg/L, reaction times 30min, completes the absorption of phosphoric residue and the nitrogen of stripping denitrification stage generation.
(4), after aeration terminates, close the first air pump (10), after quiescent setting 30min, carry out mud-water separation, supernatant liquor by N ?SBR intake pump (5) proceed to N ?sbr reactor device, simultaneously spoil disposal, control mud age 10 ?15d, sludge concentration 2800 ?4000mg/L.
(5) second air pumps (11) are opened, aeration rate is regulated by the second gas meter (15), control DO=2 ?4mg/L, aeration time 3 ?4h, N ?nitrifier in sbr reactor device be nitric nitrogen at the condition decline ammonium oxidation of aerobic aeration, after reaction terminates, a supernatant liquor part (draining is than 0.4) by reflux pump (6) inject A/A/O ?the anoxic phases of sbr reactor device provide nitric nitrogen for its denitrification dephosphorization, a part (draining is than 0.2) is discharged by water discharge valve (7), spoil disposal simultaneously, control sludge age 15 ?25d, sludge concentration 2800 ?4000mg/L.
Wherein pass through the sludge age of control A/A/O-SBR at 10-15d, the nitrifier longer mud age is eluriated, the sludge age of control N-SBR reactor is at 15-25d, this measure solves the mud battle in age of polyP bacteria and nitrifier, A/A/O-SBR runs under short mud condition in age, is conducive to dephosphorization and denitrification, and N-SBR reactor runs under long mud condition in age, be conducive to nitrated, and provide sufficient electron acceptor(EA) for anoxic denitrification dephosphorization stage of A/A/O-SBR.
With Certain University in Beijing dependents' district sanitary sewage for handling object, investigate 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 | ? |
| Draining | ? | 2 | ? |
| DO(mg/L) | 2‐4 | ? | ? |
Under this operating parameter, water outlet COD, NH
3-N, NO
3 -the technical indicators such as N, TN, TP are 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 (1)
1. an improvement A
2the method of NSBR denitrifying phosphorus removal technique, application is as lower device, this device comprises former water tank (1), A/A/O-SBR reactor (2), N-SBR reactor (3), former water tank (1) is connected with A/A/O-SBR reactor (2) by raw water pump (4), A/A/O-SBR reactor (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 (2) by reflux pump (6), first air pump (10) is connected with A/A/O-SBR reactor (2) by the first gas meter (14), second air pump (11) is connected with N-SBR reactor (3) by the second gas meter (15),
It is characterized in that, comprise the following steps:
(1) sanitary sewage by former water tank (1) through raw water pump (4) enter A/A/O ?sbr reactor device (2), after water inlet end, agitator (12) starts to stir, DPAOS utilizes the VFAs in former water to synthesize internal carbon source PHA, release phosphorus simultaneously, control ORP=?30～?240mv, DO≤0.2mg/L, water-filling than 0.2, reaction times 1.5 ?2h;
(2) after the reaction of anaerobism section terminates, by reflux pump (6) inject from N ?the backflow nitrification liquid of sbr reactor device (3), DPAOS 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, control ORP=?90 ~ ?210mv, DO≤0.2mg/L, water-filling than 0.4, reaction times 4 ?5h;
(3) after the reaction of anoxic section terminates, first air pump (10) is opened, of short duration aeration is carried out by the first gas meter (14) adjusting gas flow, control DO=2 ?3mg/L, reaction times 30min, completes the absorption of phosphoric residue and the nitrogen of stripping denitrification stage generation;
(4), after aeration terminates, close the first air pump (10), after quiescent setting 30min, carry out mud-water separation, supernatant liquor by N ?SBR intake pump (5) proceed to N ?sbr reactor device, simultaneously spoil disposal, control mud age 10 ?15d, sludge concentration 2800 ?4000mg/L;
(5) second air pumps (11) are opened, aeration rate is regulated by the second gas meter (15), control DO=2 ?4mg/L, aeration time 3 ?4h, N ?nitrifier in sbr reactor device be nitric nitrogen at the condition decline ammonium oxidation of aerobic aeration, after reaction terminates, a supernatant liquor part, its draining ratio is 0.4, by reflux pump (6) inject A/A/O ?the anoxic phases of sbr reactor device provide nitric nitrogen for its denitrification dephosphorization, supernatant liquor another part, draining ratio is 0.2, discharged by water discharge valve (7), spoil disposal simultaneously, control sludge age 15 ?25d, sludge concentration 2800 ?4000mg/L.
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| 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 |
| CN104817179B (en) * | 2015-05-17 | 2017-01-25 | 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 |
| 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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| KR100415252B1 (en) * | 2001-03-09 | 2004-01-16 | 주식회사 제일엔지니어링 | Biological Nitrogen Removal from Nitrogen-Rich Wastewaters by Partial Nitrification and Anaerobic Ammonium Oxidation |
| CN1247470C (en) * | 2004-03-26 | 2006-03-29 | 彭永臻 | SBR alternant aerobic/anaerobic technology for biological denitrification and real time control device and method thereof |
| CN201538728U (en) * | 2009-04-17 | 2010-08-04 | 北京工业大学 | Improved A2N denitrifying dephosphatation and deep denitrification device |
| CN102381818B (en) * | 2011-10-24 | 2013-06-05 | 沈阳建筑大学 | A2N-SBR (Anaerobic-anoxic/nitrification-sequencing batch reactor) process with shortcut nitrification-denitrification denitrifying and dephosphorizing function |
| CN103011520B (en) * | 2012-12-23 | 2013-11-06 | 北京工业大学 | Method for starting A2N two-stage SBR denitrifying phosphorus removal |
| CN103086511B (en) * | 2012-12-25 | 2014-03-26 | 北京工业大学 | Method for enhancing nitrogen and phosphorus removal of urban sewage by sludge fermentation |
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