CN105621615A - Inverted A2/O step feed coupled aerobic particle sludge reinforced synchronous nitrification/denitrification dephosphorization device - Google Patents
Inverted A2/O step feed coupled aerobic particle sludge reinforced synchronous nitrification/denitrification dephosphorization device Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
Abstract
The invention relates to an inverted A2/O step feed coupled aerobic particle sludge reinforced synchronous nitrification/denitrification dephosphorization device, belonging to the technical field of biological methods. In order to solve the problems of high energy consumption by sludge internal reflux, low water-quality water-flow fluctuation resistance and influence of reflux mixed sludge on anaerobic-section phosphorus release effect in the existing UCT step feed, the device combines an inverted A2/O step feed technique and an aerobic particle sludge process. The new technique has the characteristics of stable denitrification and dephosphorization effects, energy saving, consumption reduction, high water-quality water-flow fluctuation resistance and the like.
Description
Technical field:
The present invention relates to a kind of coupling inversion A2The device of/O segmental influent and aerobic particle mud method strengthening biological carbon and phosphorous removal, belongs to biological sewage processing technology field, and it is by inversion A2/ O step feed technology and aerobic particle mud technique combine, compare traditional technology have can make full use of carbon source, the process water yield is big, the impact load of resistance to water quality and quantity strong, process effect stability advantages of higher.
Background technology:
Inversion A2/ O step feed technology is coupling inversion A2A kind of high-efficiency activated sludge technique of/O technique and step feed technology. This technique is always divided into three sections of water inlets, and every section of water inlet is all intake in anoxic section. As mentioned above, it is necessary, technical process is anoxic, anaerobism, aerobic, anoxic, aerobic, anoxic, aerobic. First section of oxygen-starved area, by complete for the nitric nitrogen denitrification carried in returned sluge, ensures the anaerobic phosphorus release effect of follow-up anaerobism section, and follow-up anoxic, the aerobic carbon source made full use of in former water carry out denitrification. This technique has multiple advantage: 1. makes full use of the carbon source in former water and carries out denitrogenation dephosphorizing, and than low present situation, current municipal effluent C/N is had huge meaning, saves carbon source dosage when ensureing effluent quality; 2. the nitrification liquid that aerobic section produces in addition is removed by denitrification in hypomere anoxic section, it is not necessary to arranges nitrification liquid backflow, saves working cost; 3. UCT segmental influent is compared, inversion A2/ O segmental influent eliminates mud from first section of oxygen-starved area to the internal reflux of anaerobic zone, directly enters pond body with former water from first section of oxygen-starved area, energy-saving and cost-reducing; 4. existing water factory upgrading is facilitated. That current most of water factory adopts is traditional A2/ O technique, on body basis, original pond, only need to be adjusted to multipoint water feeding by former water water entry, part anoxic section, aerobic section be adjusted.
Aerobic particle mud technique is the active sludge of a kind of special shape, has the ability of good settling property, closely knit structure, higher biomass, stronger impact load and opposing hazardous and noxious substances. It is now recognized that Granular sludge formation divides four-stage: 1. microorganism is close under physical action, form initial polymer; 2. reactive force between physics, chemistry and biology, makes between bacterium, adsorbs further between bacterium and solid, form polymkeric substance. This adsorbs reversible; 3. extracellular polymeric produces, and xanthan gel makes particle be formed further, forms irreversible adsorption; 4., under the effect of water shearing force, the aerobic particle mud of Stability Analysis of Structures is formed. Aerobic particle mud has lot of advantages, aerobic particle mud comprises the microorganism of multiple aerobic, facultative and anaerobism, form a complete microflora, multiple pollutant in waste water is had good degraded potentiality, there is good degradation capability, being used for process high loading and toxic wastewater, have the ability of anti-load, harmful toxic matter impact, effluent quality is good. Continuous Flow realizes aerobic particle mud be significant, when same pond body, it is not necessary to enlarging can increase sewage load, save initial cost, ensure effluent characteristics. In processing for actual sewage, sewage water quantity and quality is unstable, everyday changes greatly simultaneously, and the difference in season and season is bigger, and aerobic particle mud mud is all very strong to the shock-resistant ability of water quality and quantity, can stablize effluent quality.
Synchronous nitration and denitrification (SND) is the phenomenon in recent years found, the process of current low ratio of carbon to ammonium municipal effluent is had positive pushing effect, can realize carbon and nitrogen removal dephosphorization simultaneously. Current theory thinks that SND phenomenon is facilitated primarily of macro environment and micro two aspect. Macroscopic view aspect major influence factors is dissolved oxygen (DO), and the dissolved oxygen (DO) in reactor is obtained by aerating apparatus. The even situation of different aerating apparatus aerations is different, even if stirring is also difficult to keep in reactor, dissolved oxygen is identical everywhere. Like this, the state of appearance local anoxic inevitable in reactor during aeration, this just for occur SND phenomenon to provide possibility in same reactor. Microscopic theory thinks the restriction owing to dissolved oxygen (DO) spreads, and produces DO gradient in wad a quilt with cotton in microorganism body or particle. Like this at wadding body or particle surface DO concentration height, based on aerobic nitrification bacterium, along with the decline of DO concentration, form anoxic or anaerobic environment, and the product NO of nitrated formation3 -��NO2 -Can transmit to the inside, be utilized by denitrifying bacterium. So just complete nitrification and denitrification simultaneously.
Summary of the invention:
The present invention is coupled inversion A2/ O step feed technology and aerobic particle mud technique, utilize synchronous nitration and denitrification technique biological denitrificaion, utilize inversion A simultaneously2/ O ensures phosphor-removing effect.
Inversion A2The device of/O segmental influent coupling aerobic particle mud is as follows:
Raw water box (1), intake pump (2), intake pump (3), intake pump (4) and apparatus main body (17) is connected by water inlet pipe; Apparatus main body (17) is connected with settling tank (13) by rising pipe; Settling tank (13) sets out water pipe (15), shore pipe (16), connects sludge reflux pump (14) by mud return line, and sludge reflux is to first section of anoxic section (5); Main body is divided into 8 regions by perforate dividing plate or the short plate of down stream, is respectively first paragraph oxygen-starved area (5), the 2nd section of oxygen-starved area (6), first paragraph anaerobic zone (7), first paragraph aerobic zone (8), the 3rd section of oxygen-starved area (9), the 2nd section of aerobic zone (10), the 4th section of oxygen-starved area (11), the 3rd section of aerobic zone (12) along water inlet direction; All arranging stirring except the 3rd section of aerobic zone (12), oxygen-starved area and anaerobic zone make liquid mixing even, sufficient reacting, and aerobic zone provides hydraulic shear by stirring, and cultivates granule sludge; The water-out manners of first paragraph aerobic zone (8), the 2nd section of aerobic zone (10) is drop, and current direction subsequent reaction zone of dropping out, holds, to ensure, the granule sludge staying aerobic zone.
Inversion A2The know-why of/O segmental influent coupling aerobic particle mud strengthening synchronous nitration denitrification denitrogenation dephosphorization apparatus comprises:
(1) domestic sewage according to water three part enters first paragraph oxygen-starved area, the 3rd section of oxygen-starved area, the 4th section of oxygen-starved area respectively through intake pump, first paragraph oxygen-starved area and the 2nd section of oxygen-starved area utilize the carbon source in former water to be removed by the nitric nitrogen denitrification in returned sluge, ensure that anaerobism section is in anaerobic state. In first paragraph anaerobism section, polyP bacteria absorbs labile organic compound storage internal carbon source, discharge orthophosphoric acid salt simultaneously, then mixed solution enters first paragraph aerobic section, aerobic particle mud is there is in aerobic section, due to the DO gradient of macroscopic view anaerobic environment and microcosmic, aerobic particle mud utilizes the residue carbon source in former water to carry out synchronous nitration and denitrification. Remaining nitric nitrogen enters the 3rd section of anoxic section, utilizes the carbon source in the 2nd section of water inlet to be removed by the nitric nitrogen denitrification in first paragraph aerobic zone. The effect of the 2nd section of aerobic zone, the 4th section of oxygen-starved area is the same. 3rd section of aerobic zone does not have granule sludge, mainly completes the Ammonia Nitrification of the 3rd section of oxygen-starved area water outlet and aerobic suction phosphorus process.
(2) controlling at 10-12 days by row's mud by sludge age, hydraulic detention time is 10-11 hour, and return sludge ratio is 100%, without mud internal reflux, without nitrification liquid backflow, energy-saving and cost-reducing.
Present invention also offers the method that the good sample granule sludge of a kind of Continuous Flow starts, it is characterised in that:
Unloading phase: fetch stream sludge seeding in reactor from sewage work, after inoculation, mixing sludge concentration is MLSS=3500-3800mg/L, unloading phase control DO=0.5-1mg/L by dissolved oxygen monitor, water inlet is residential quarter sanitary sewage, C/N is at 3-3.5, C/N is conducive to thread fungus to grow below 4, after steady running 5d, by adding concentration that potassium primary phosphate increases phosphorus in former water to 10mg/L, sewage disposal stresses dephosphorization, three sections of water inlet volume ratios are 5:3:2, first paragraph oxygen-starved area (5), 2nd section of oxygen-starved area (6) is by complete for the nitric nitrogen denitrification in returned sluge, it is abundant that phosphorus effect is released in anaerobic zone (7), ensure follow-up aerobic suction phosphorus effect, reaction process is monitored mud SVI (sludge volume index, refer to that aeration tank mixed solution is after 30min precipitates, volume shared by the dry mud of corresponding 1g, Unit/mL/g, lower same), SVI value reaches less than 75 and starts particle cultivation stage.
Particle cultivation stage: record 100-500 ��m of particle diameter mud with laser particle size analyzer and reach more than 74%, the agitator (18) of particle cultivation stage first paragraph aerobic zone (8), the 2nd section of aerobic zone (10) starts to stir, rotating speed controls at 60-75r/min, first paragraph aerobic zone (8), the 2nd section of aerobic zone (10) adopt down stream water outlet simultaneously, particle is held to be stayed in aerobic zone, question response device is stable, aerobic lattice sludge concentration sludge concentration maintains 4700-5200mg/L, enters and maintains the adjusting stage.
Maintain the adjusting stage: sewage disposal is for the purpose of denitrogenation dephosphorizing, water inlet volume ratio changes 4:4:2 into, adjustment aerobic zone aeration rate, make DO=1-1.5mg/L, utilize macroscopic view anaerobic environment and microcosmic anaerobic environment in first paragraph aerobic zone (8), the 2nd section of aerobic zone (10), carry out synchronous nitration denitrification denitrogenation effect, increase first paragraph aerobic zone (8), the 2nd section of interior stirring velocity of aerobic zone (10) to 75-80r/min, liquid and particle are mixed; The sludge reflux amount being back to the first oxygen-starved area (5) is set to 100%, and sludge age controls at 10-12d by row's mud, it is not necessary to nitrification liquid backflow and mud internal reflux.
Inversion A2The advantage of/O segmental influent coupling aerobic particle mud strengthening synchronous nitration denitrification denitrogenation dephosphorization apparatus is:
(1) be coupled inversion A2/ O step feed technology and aerobic particle mud, when dissolved oxygen is less than 1, the outer aerobic nitrification bacterium of granule sludge utilizes dissolved oxygen to carry out nitrification, internal layer DO reduces, and Simultaneous Nitrification product nitric nitrogen is delivered to internal layer, carries out denitrification under anoxic conditions by internal layer denitrifying bacteria, strengthening synchronous nitration denitrification denitrogenation effect, under equal conditions increase sewage treatment capacity, save aeration energy consumption, stable effluent quality;
(2) the aerobic particle mud impact load of resistance to water quality and quantity is strong, and during actual water factory runs, water quality and quantity fluctuates constantly, and the difference in season and season is bigger, and actual sewage factory is run significant by this technique.
(3) Continuous Flow realizes the cultivation of granule sludge, sewage load can be increased, effectively prevent sludge bulking, reduce the generation of excess sludge.
Accompanying drawing illustrates:
Fig. 1 is the device schematic diagram of the present invention.
In figure, 1-raw water box; 2-intake pump; 3-intake pump; 4-intake pump; 5-first paragraph oxygen-starved area; 6-the 2nd section of oxygen-starved area; 7-anaerobic zone; 8-first paragraph aerobic zone; 9-the 3rd section of oxygen-starved area; 10-the 2nd section of aerobic zone; 11-the 4th section of oxygen-starved area; 12-the 3rd section of aerobic zone; 13-second pond; 14-sludge reflux pump; 15-rising pipe; 16-shore pipe; 17-reactor body; 18-agitator; 19-aerating apparatus; 20-air pump.
Embodiment:
Embodiments of the present invention are:
1. former water controls access to plant main body by intake pump. The former water of first paragraph and returned sluge enter first paragraph oxygen-starved area, utilize carbon source in former water to be removed by nitric nitrogen denitrification in returned sluge in first paragraph oxygen-starved area, the 2nd section of oxygen-starved area; 2. the water outlet of anoxic section enters anaerobism section, and polyP bacteria under anaerobic absorbs labile organic compound, saves as internal carbon source, releases phosphorus simultaneously; 3. the water outlet of anaerobism section enters first paragraph aerobic zone, and nitrifier completes nitrification, and part ammonia nitrogen is removed by synchronous nitration and denitrification, and polyP bacteria completes aerobic suction phosphorus process; 4. the water outlet of first paragraph aerobic zone enters the 3rd section of oxygen-starved area, and residue nitric nitrogen utilizes the carbon source in the 2nd section of water inlet by denitrifying bacteria, is removed by denitrification; 5. the 3rd section of oxygen-starved area completes denitrification, and mixed solution enters the 2nd section of aerobic zone, and effect is identical with the effect of first paragraph aerobic zone; 6. the 4th section of oxygen-starved area effect is identical with the 3rd section of oxygen-starved area effect; 7. only have floc sludge in the 3rd section of aerobic zone, by nitrification, utilize the carbon source in the 3rd section of water inlet, be nitric nitrogen by Ammonia Nitrification; 8. the 3rd section of aerobic zone water outlet enters second pond and carries out mud-water separation, and part sludge reflux is to first paragraph oxygen-starved area.
Present invention also offers the method that the good sample granule sludge of a kind of Continuous Flow starts, it is characterised in that:
(1) unloading phase: fetch stream sludge seeding in reactor from sewage work, after inoculation, mixing sludge concentration is MLSS=3500-3800mg/L, initial reaction stage first paragraph aerobic zone (8), the agitator (18) of the 2nd section of aerobic zone (10) does not stir, DO=0.5-1mg/L is controlled by dissolved oxygen monitor (21), water inlet is residential quarter sanitary sewage, C/N is at 3-3.5, C/N is conducive to thread fungus to grow below 4, after steady running 5d, by adding concentration that potassium primary phosphate increases phosphorus in former water to 10mg/L, sewage disposal stresses dephosphorization, three sections of water inlet volume ratios are 5:3:2, first paragraph oxygen-starved area (5), 2nd section of oxygen-starved area (6) is by complete for the nitric nitrogen denitrification in returned sluge, it is abundant that phosphorus effect is released in anaerobic zone (7), ensure follow-up aerobic suction phosphorus effect, reaction process is monitored mud SVI, SVI value reaches less than 75 and starts particle cultivation stage.
(2) particle cultivation stage: record 100-500 ��m of particle diameter mud with laser particle size analyzer and reach more than 74%, particle cultivation stage first paragraph aerobic zone (8), the agitator (18) of the 2nd section of aerobic zone (10) starts to stir, rotating speed controls at 60-65r/min, simultaneously first paragraph aerobic zone (8), 2nd section of aerobic zone (10) adopts down stream water outlet, particle is held to be stayed in aerobic zone, particle is closely knit, agitator speed is improved to 70-75r/min after smooth surface, screening particle, question response device is stable, aerobic lattice sludge concentration 4700-5200mg/L, enter and maintain the adjusting stage.
(3) adjusting stage is maintained: sewage disposal is for the purpose of denitrogenation dephosphorizing, water inlet volume ratio changes 4:4:2 into, adjustment aerobic zone aeration rate, make DO=1-1.5mg/L, utilize macroscopic view anaerobic environment and microcosmic anaerobic environment in first paragraph aerobic zone (8), the 2nd section of aerobic zone (10), carry out synchronous nitration denitrification denitrogenation effect, increase first paragraph aerobic zone (8), the 2nd section of interior stirring velocity of aerobic zone (10) to 75-80r/min, liquid and particle are mixed; The sludge reflux amount being back to the first oxygen-starved area (5) is set to 100%, and sludge age controls at 10-12d by row's mud, it is not necessary to nitrification liquid backflow and mud internal reflux.
Example
Taking Beijing colleges and universities dependents' district actual domestic wastewater as handling object, water quality situation is in table 1. Inoculation Sewage Plant returned sluge, reactor sludge concentration 3500mg/L, sludge reflux amount is set to 100%, sludge age controls at 10-12d by row's mud, initial start stage stresses to cultivate thread fungus and polyP bacteria, suitably improving water inlet phosphorus concentration by adding medicament, steady running about 10 days, SVI reaches 73mL/g; Start the first two aerobic zone agitator, maintain stirring at low speed, after stable, slightly improve rotating speed, increase influent COD, increase aeration to 1-1.5mg/L, it is provided that Selective Pressure, screening particle; Monitoring mud SVI value in reaction process, maintain stable reaction and run, obvious particle occur, react 45 days particles mature and stable when reacting 35 days, aerobic zone MLSS reaches 5200mg/L, and process effect stability, stable water outlet reaches one-level A standard.
Table one
Claims (2)
1. inversion A2/ O segmental influent coupling aerobic particle mud strengthening synchronous nitration denitrification denitrogenation dephosphorization apparatus, it is characterised in that:
Raw water box (1), intake pump (2), intake pump (3), intake pump (4), apparatus main body (17), settling tank (13) is connected in turn by water pipe; Main body is divided into 8 regions by perforate dividing plate and breviseptum, is respectively first paragraph oxygen-starved area (5), the 2nd section of oxygen-starved area (6), anaerobic zone (7), first paragraph aerobic zone (8), the 3rd section of oxygen-starved area (9), the 2nd section of aerobic zone (10), the 4th section of oxygen-starved area (11), the 3rd section of aerobic zone (12) along water inlet direction; Wherein first paragraph oxygen-starved area (5), the 2nd section of oxygen-starved area (6), anaerobic zone (7), first paragraph aerobic zone (8), the 3rd section of oxygen-starved area (9), the 2nd section of aerobic zone (10), the 4th section of oxygen-starved area (11) arrange agitator (18); Former moisture three sections, connects to first paragraph oxygen-starved area (5), the 3rd section of oxygen-starved area (9), the 4th section of oxygen-starved area (11) by intake pump (2), intake pump (3), intake pump (4) respectively; First paragraph aerobic zone (8), the 2nd section of aerobic zone (10), the 3rd section of aerobic zone (12) establish aeration head (19) in bottom, and aeration head (19) is connected with air pump (20); Settling tank (13) sets out water pipe (15), shore pipe (16), mud and is back in first paragraph oxygen-starved area (5), aerobic zone to establish dissolved oxygen (DO) monitoring device (21) by sludge reflux pump (14).
2. inversion A according to claim 12/ O segmental influent coupling aerobic particle mud strengthening synchronous nitration denitrification denitrogenation dephosphorization apparatus realizes the method for advanced nitrogen dephosphorization, it is characterised in that: comprise the following steps:
(1) unloading phase: fetch stream sludge seeding in reactor from sewage work, after inoculation, mixing sludge concentration is MLSS=3500-3800mg/L, initial reaction stage first paragraph aerobic zone (8), the agitator (18) of the 2nd section of aerobic zone (10) does not stir, DO=0.5-1mg/L is controlled by dissolved oxygen monitor (21), water inlet is residential quarter sanitary sewage, C/N is than at 3-3.5, after running 5d, by adding concentration that potassium primary phosphate increases phosphorus in former water to 10mg/L, three sections of water inlet volume ratios are 5:3:2, first paragraph oxygen-starved area (5), 2nd section of oxygen-starved area (6) is by complete for the nitric nitrogen denitrification in returned sluge, reaction process is monitored mud SVI, SVI value reaches below 75mL/g and starts particle cultivation stage,
(2) particle cultivation stage: record 100-500 ��m of particle diameter mud with laser particle size analyzer and reach more than 74%, the agitator (18) of particle cultivation stage first paragraph aerobic zone (8), the 2nd section of aerobic zone (10) starts to stir, rotating speed controls at 60-75r/min, first paragraph aerobic zone (8), the 2nd section of aerobic zone (10) adopt down stream water outlet simultaneously, screening particle, question response device is stable, aerobic lattice sludge concentration maintains 4700-5200mg/L, enters and maintains the adjusting stage;
(3) adjusting stage is maintained: water inlet volume ratio changes 4:4:2 into, adjustment aerobic zone aeration rate, make DO=1-1.5mg/L, increase first paragraph aerobic zone (8), the 2nd section of interior stirring velocity of aerobic zone (10) to 75-80r/min, liquid and particle are mixed; The sludge reflux amount being back to the first oxygen-starved area (5) is set to 100%, and sludge age is controlled at 10-12d by row's mud.
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| CN106045041A (en) * | 2016-07-16 | 2016-10-26 | 北京工业大学 | A<2>/O denitrifying phosphorus removal device and method for bi-granule sludge improvement |
| CN108046538A (en) * | 2017-12-29 | 2018-05-18 | 桑德生态科技有限公司 | A kind of rural domestic sewage treatment system and method |
| CN109231459A (en) * | 2018-10-29 | 2019-01-18 | 中国市政工程华北设计研究总院有限公司 | It is a kind of for handling the biochemistry pool and its treatment process of rain dirt mixing water |
| WO2020205834A1 (en) * | 2019-04-01 | 2020-10-08 | Carollo Engineers, Inc. | Flow through aerobic granular sludge system and method |
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| IL301450A (en) * | 2020-09-29 | 2023-05-01 | Carollo Eng Inc | Wastewater treatment system and method using aerobic granular sludge with immersed membrane separation |
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