CN104817173A - Two-stage double-flow autotrophic denitrification biofilter - Google Patents
Two-stage double-flow autotrophic denitrification biofilter Download PDFInfo
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- CN104817173A CN104817173A CN201510137293.2A CN201510137293A CN104817173A CN 104817173 A CN104817173 A CN 104817173A CN 201510137293 A CN201510137293 A CN 201510137293A CN 104817173 A CN104817173 A CN 104817173A
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- filter tank
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- autotrophic denitrification
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- aeration head
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Abstract
The invention discloses a two-stage double-flow autotrophic denitrification biofilter. The biofilter comprises a reactor body, and a sleeve and a filler arranged in the reactor, wherein the reactor body is provided with, from bottom to top, a backflow water-distribution unit, a mud discharge unit, an autotrophic denitrification unit, a three-phase separation unit, and water outlet and air-exhausting units; the backflow water-distribution unit is provided with a conical water distributor and an aeration tray; the mud discharge unit is provided with a mud outlet at the left side of the bottom end of the reactor body; the autotrophic denitrification unit is divided by the sleeve into an outer filter and an inner filter which are upward-and-downward communicated, and the interiors of the filters are filled with the filler; the three-phase separation unit is provided with a conical guide plate, a hemispherical air-collecting hood, an air outlet and an overflow weir; and the water outlet unit comprises a water outlet groove and a water outlet. The invention has the following beneficial effects: a novel pneumatic design is adopted, and the two filters can be independently switched between micro-aerobic and anaerobic environments and between flow rising and flow falling modes, so falling-off and renewal of biological membranes are accelerated and the problem of blockage of the filler is effectively overcome; and a two-stage internal-circulation system is arranged, so strong shock load resistibility and good denitrification effect are obtained.
Description
Technical field
The present invention relates to a kind of two-stage double-current method autotrophic denitrification biological filter.
Background technology
Ammonia-containing water excessive emissions, causes a series of ecological environment problems such as body eutrophication in recent years.The efficient low-consume process of ammonia-containing water is a difficult problem and the focus of sewage treatment area always.
Whole process autotrophic denitrification has that denitrifying load is high, capital construction cost is low, compact construction, plant running and control the advantages such as simple, and effectively can avoid the suppression because high density Nitrite accumulation causes.But there are following distinct issues: (1) whole process autotrophic denitrification reactor many employings sequencing batch reactor in the past, the reactor start-up time is long, thalline runs off serious; Start successfully, anti impulsion load ability is weak; (2) biological filter effectively can be held and be stayed thalline, treatment effect is good and anti impulsion load is strong, but be easy to blocking bottom flow lifting type biological filter, sludge concentration is uneven along altitude distribution, upper few lower many, top filtrate can not be fully utilized affects operating performance, though and fall streaming biological filter and not easily block, biomass is low; (3) biological filter needs out of service when back flushing usually, not only consuming time but also take energy.
Summary of the invention
In order to solve the above problems, the present invention proposes a kind of by two groups of aeration modes change the inner gas-liquid flow in filter tank to, independently can not only switch two micro-oxygen in filter tank, anaerobic environment and up-flow, fall stream mode, back flushing can also be realized, the two-stage double-current method autotrophic denitrification biological filter of efficient energy-saving when continuous operations.
A kind of two-stage double-current method autotrophic denitrification biological filter of the present invention, it is characterized in that: comprise reactor body, be located at sleeve and the filler of inside reactor, reactor body is provided with backflow water distribution unit from bottom to top, spoil disposal unit, autotrophic denitrification unit, three phase separation unit, water outlet exhaust unit, described backflow water distribution unit comprises aeration plate, taper water distributor, the aeration head that described aeration plate is arranged is divided into outer aeration head and center aeration head, its China and foreign countries' aeration head is arranged on immediately below outer filter tank, center aeration head is arranged on immediately below interior filter tank, described taper water distributor is fixed on bottom the reactor body below aeration plate, and the water-in of taper water distributor is connected with extraneous intake pump water outlet, described spoil disposal unit is provided with mud discharging mouth in side, reactor body bottom, described autotrophic denitrification unit is divided into the outer filter tank and interior filter tank that are communicated with up and down by sleeve, filler is filled in outer filter tank and inside, interior filter tank, and filler has supporting layer, described three-phase separation area is provided with conical baffle, semisphere gas skirt with venting port, conical baffle is arranged between reactor body inwall and semisphere gas skirt immediately below gap, and leaves gap between conical baffle and semisphere gas skirt as the passage for being vented, described water unit comprises effluent trough, water outlet, and described effluent trough is arranged on reactor body periphery, and water outlet is arranged on effluent trough.
Further, described reactor body is cylindric, and aspect ratio is 2:1 ~ 5:1, and described outer filter tank, interior filter tank volume ratio are 3:1 ~ 8:1.
Further, the height of described sleeve and reactor body aspect ratio are 1:1.5 ~ 1:2.
Further, described peripheral aeration head and the number of center aeration head are respectively 4.
Further, described filler adopts waveform tabular or porous sieve tray or banded soft fibers filler.
Further, the tip of conical baffle is in same level all the time, and is formed centrally centre hole in the tip of conical baffle sensing reactor body.
Further, the diameter of described semisphere gas skirt is less than reactor body interior diameter, is greater than the diameter of conical baffle centre hole.
Further, the top of described reactor body is provided with overflow weir.
Further, described aeration plate mode of operation changes according to the operational mode in outer filter tank, interior filter tank, when stream falls in outer filter tank, during the running of interior filter tank up-flow, closes peripheral aeration head, opens center aeration head; When outer filter tank up-flow, when stream running falls in interior filter tank, open peripheral aeration head, closing center's aeration head; Two kinds of operation scheme cycle alternations are implemented, and the cycle of operation adjusts according to the trafficability performance in outer filter tank and interior filter tank.
The advantage of patent of the present invention is mainly reflected in: 1. adopt the design of Novel air dynamic formula, two filter tanks can realize micro-oxygen, anaerobic environment and up-flow, fall the autonomous switching of stream mode; 2. built-in filler, efficiently holds and stays thalline, maintains the sludge concentration that filter tank is inner higher; 3. build two-stage inner circulating reflux system, anti impulsion load ability is good; 4. by two groups of aeration patterns, realize the switching of internal recycle reaction member function, back flushing can be carried out while operation, effectively solve filler blockage problem; 5. compare with split type short distance nitration-anaerobic ammoxidation reactor, this apparatus structure be compact, floor space is little, energy saving economy, can effectively avoid high density nitrite accumulation to the suppression of anaerobic ammonia oxidizing bacteria.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram one (arrow represents waste water direction of motion) of the present invention.
Fig. 2 is structural principle schematic diagram two (arrow represents waste water direction of motion) of the present invention.
Fig. 3 is the distribution schematic diagram of aeration head of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing
With reference to accompanying drawing:
Embodiment 1 a kind of two-stage double-current method autotrophic denitrification biological filter of the present invention, comprise reactor body, be located at sleeve and the filler of inside reactor, reactor body is provided with backflow water distribution unit from bottom to top, spoil disposal unit, autotrophic denitrification unit, three phase separation unit, water outlet exhaust unit, described backflow water distribution unit comprises aeration plate 1, taper water distributor 3, the aeration head that described aeration plate 1 is arranged is divided into outer aeration head 16 and center aeration head 17, its China and foreign countries' aeration head 16 is arranged on immediately below outer filter tank 11, center aeration head 17 is arranged on immediately below interior filter tank 12, described taper water distributor 3 is fixed on bottom the reactor body below aeration plate 1, and the water-in of taper water distributor 3 is connected with extraneous intake pump 2 water outlet, described spoil disposal unit is provided with mud discharging mouth 15 in side, reactor body bottom, described autotrophic denitrification unit is divided into the outer filter tank 11 and interior filter tank 12 that are communicated with up and down by sleeve 4, filler 13 is filled in outer filter tank 11 and inside, interior filter tank 12, filler 13 has supporting layer 14, described three-phase separation area is provided with conical baffle 10, semisphere gas skirt 9 with venting port 8, conical baffle 10 is arranged between reactor body inwall and semisphere gas skirt 9 immediately below gap, and leaves gap between conical baffle 10 and semisphere gas skirt 9 as the passage for being vented, described water unit comprises effluent trough 5, water outlet 6, and described effluent trough 5 is arranged on reactor body periphery, and water outlet 6 is arranged on effluent trough 5.
Further, described reactor body is cylindric, and aspect ratio is 2:1 ~ 5:1, and described outer filter tank 11, interior filter tank 12 volume ratio are 3:1 ~ 8:1.
Further, the height of described sleeve 4 and reactor body aspect ratio are 1:1.5 ~ 1:2.
Further, described peripheral aeration head 16 and the number of center aeration head 17 are respectively 4.
Further, described filler 13 adopts waveform tabular or porous sieve tray or banded soft fibers filler.
Further, the tip of conical baffle 10 is in same level all the time, and is formed centrally centre hole in the tip of conical baffle 10 sensing reactor body.
Further, the diameter of described semisphere gas skirt 9 is less than reactor body interior diameter, is greater than the diameter of conical baffle 10 centre hole.
Further, the top of described reactor body is provided with overflow weir 7.
Further, described aeration plate 1 mode of operation changes according to the operational mode in outer filter tank 11, interior filter tank 12, when stream falls in outer filter tank 11, during the running of interior filter tank 12 up-flow, closes peripheral aeration head 16, opens center aeration head 17; When outer filter tank 11 up-flow, when stream running falls in interior filter tank 12, open peripheral aeration head 16, closing center's aeration head 17; Two kinds of operation scheme cycle alternations are implemented, and the cycle of operation adjusts according to the trafficability performance in outer filter tank 11 and interior filter tank 12.
Embodiment 2 utilizes the device of embodiment 1, react: a kind of two-stage double-current method autotrophic denitrification biological filter of the present invention can make of PVC board or steel plate, its operation scheme one (Fig. 1) is as follows: nitrogenous effluent introduces reactor by intake pump 2 through taper water distributor 3, through center aeration head 17 aeration, waste water enters interior filter tank 12, part NH from bottom
4 +the Nitrite bacteria adhered to by filler 13 top layer is converted into NO
2 -, NO
2 -again and NH
4 +be converted into nitrogen by the anaerobic ammonium oxidizing bacteria of filler internal layer, nitrogen and the surplus air of generation enter three-phase separation area, and gas constantly rises to be collected by semisphere gas skirt 9 and discharges from venting port 8, and waste water enters outer filter tank 11 subsequently, wherein residual NO
2 -and NH
4 +be converted into nitrogen by the anaerobic ammonia oxidizing bacteria of attachment on filler 13, the nitrogen rising of generation is collected by semisphere gas skirt 9 and is discharged from venting port 8.Water outlet is discharged from effluent trough 5 bottom water outlet 6 through overflow weir 7.Form certain negative pressure because air water rises bottom interior filter tank 12, promote to flow in bottom, fluid inside filter tank 12, bottom, outer filter tank 11 and supplement.When after operation for some time, because biomass is superfluous bottom interior filter tank 12, circulate not smooth.
After this, operation scheme two (Fig. 2) is opened: 4 center aeration heads 17 are closed, and 4 peripheral aeration heads 16 are opened, and waste water enters outer filter tank 11, part NH from bottom
4 +the Nitrite bacteria adhered to by filler 13 top layer is converted into NO
2 -, NO
2 -again and NH
4 +be converted into nitrogen by the anaerobic ammonium oxidizing bacteria of filler internal layer, nitrogen and the surplus air of generation enter three-phase separation area, and gas constantly rises to be collected by semisphere gas skirt 9 and discharges from venting port 8, and waste water enters interior filter tank 12 subsequently, wherein residual NO
2 -and NH
4 +be converted into nitrogen by the anaerobic ammonia oxidizing bacteria of attachment on filler 13, the nitrogen rising of generation is collected by semisphere gas skirt 9 and is discharged from venting port 8.Water outlet is discharged from effluent trough 5 bottom water outlet 6 through overflow weir 7.Form certain negative pressure because air water rises bottom outer filter tank 11, in promoting, the flowing of bottom, fluid inside filter tank 11, bottom, filter tank 12 supplements.The microbial film come off and excess sludge, at reactor body congregate, discharge reactor through mud discharging mouth 15.
Above-mentioned two kinds of operation scheme cycle alternations are implemented, and the cycle of operation can adjust according to the trafficability performance in outer filter tank 11 and interior filter tank 12.
Content described in this specification sheets embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as being only limitted to the specific form that embodiment is stated, protection scope of the present invention also comprises those skilled in the art and conceives the equivalent technologies means that can expect according to the present invention.
Claims (9)
1. a two-stage double-current method autotrophic denitrification biological filter, it is characterized in that: comprise reactor body, be located at sleeve and the filler of inside reactor, reactor body is provided with backflow water distribution unit from bottom to top, spoil disposal unit, autotrophic denitrification unit, three phase separation unit, water outlet exhaust unit, described backflow water distribution unit comprises aeration plate, taper water distributor, the aeration head that described aeration plate is arranged is divided into outer aeration head and center aeration head, its China and foreign countries' aeration head is arranged on immediately below outer filter tank, center aeration head is arranged on immediately below interior filter tank, described taper water distributor is fixed on bottom the reactor body below aeration plate, and the water-in of taper water distributor is connected with extraneous intake pump water outlet, described spoil disposal unit is provided with mud discharging mouth in side, reactor body bottom, described autotrophic denitrification unit is divided into the outer filter tank and interior filter tank that are communicated with up and down by sleeve, filler is filled in outer filter tank and inside, interior filter tank, and filler has supporting layer, described three-phase separation area is provided with conical baffle, semisphere gas skirt with venting port, conical baffle is arranged between reactor body inwall and semisphere gas skirt immediately below gap, and leaves gap between conical baffle and semisphere gas skirt as the passage for being vented, described water unit comprises effluent trough, water outlet, and described effluent trough is arranged on reactor body periphery, and water outlet is arranged on effluent trough.
2. a kind of two-stage double-current method autotrophic denitrification biological filter as claimed in claim 1, it is characterized in that: described reactor body is cylindric, aspect ratio is 2:1 ~ 5:1, and described outer filter tank, interior filter tank volume ratio are 3:1 ~ 8:1.
3. a kind of two-stage double-current method autotrophic denitrification biological filter as claimed in claim 2, is characterized in that: the height of described sleeve and reactor body aspect ratio are 1:1.5 ~ 1:2.
4. a kind of two-stage double-current method autotrophic denitrification biological filter as claimed in claim 1, is characterized in that: described peripheral aeration head and the number of center aeration head are respectively 4.
5. a kind of two-stage double-current method autotrophic denitrification biological filter as claimed in claim 1, is characterized in that: described filler adopts waveform tabular or porous sieve tray or banded soft fibers filler.
6. a kind of two-stage double-current method autotrophic denitrification biological filter as claimed in claim 1, is characterized in that: the tip of conical baffle is in same level all the time, and is formed centrally centre hole in the tip of conical baffle sensing reactor body.
7. a kind of two-stage double-current method autotrophic denitrification biological filter as claimed in claim 6, is characterized in that: the diameter of described semisphere gas skirt is less than reactor body interior diameter, is greater than the diameter of conical baffle centre hole.
8. a kind of two-stage double-current method autotrophic denitrification biological filter as claimed in claim 1, is characterized in that: the top of described reactor body is provided with overflow weir.
9. as a kind of two-stage double-current method autotrophic denitrification biological filter in claim 1 ~ 8 as described in any one claim, it is characterized in that: described aeration plate mode of operation changes according to the operational mode in outer filter tank, interior filter tank, when stream falls in outer filter tank, during the up-flow running of interior filter tank, close peripheral aeration head, open center aeration head; When outer filter tank up-flow, when stream running falls in interior filter tank, open peripheral aeration head, closing center's aeration head; Two kinds of operation scheme cycle alternations are implemented, and the cycle of operation adjusts according to the trafficability performance in outer filter tank and interior filter tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510137293.2A CN104817173A (en) | 2015-03-27 | 2015-03-27 | Two-stage double-flow autotrophic denitrification biofilter |
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| CN201510137293.2A CN104817173A (en) | 2015-03-27 | 2015-03-27 | Two-stage double-flow autotrophic denitrification biofilter |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517505A (en) * | 2016-12-12 | 2017-03-22 | 江苏中宜金大环保技术发展有限公司 | Denitrification filter tank and operation method thereof |
| CN107055754A (en) * | 2017-01-24 | 2017-08-18 | 河海大学 | A kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas |
| CN107555614A (en) * | 2017-10-27 | 2018-01-09 | 上海双骏环保科技有限公司 | A kind of floating media filter |
| CN109231493A (en) * | 2018-10-26 | 2019-01-18 | 浙江海洋大学 | A kind of low C/N high ammonia-nitrogen wastewater processing unit |
| CN109437392A (en) * | 2018-11-23 | 2019-03-08 | 河海大学 | A kind of circulation static bed biomembrane reactor with elastic filler |
| CN109734182A (en) * | 2019-02-26 | 2019-05-10 | 中持水务股份有限公司 | Biological aerated filter system and biological aerated filter method |
| CN114044573A (en) * | 2021-12-06 | 2022-02-15 | 北京东方启源环保科技有限公司 | Dynamic circulation anaerobic ammonium oxidation biological denitrification system |
| CN115259349A (en) * | 2022-07-12 | 2022-11-01 | 惠州学院 | Novel internal circulation biological aerated filter and wastewater aeration method thereof |
| CN116655183A (en) * | 2023-07-05 | 2023-08-29 | 贵州大学 | Acid mine wastewater treatment device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106517505A (en) * | 2016-12-12 | 2017-03-22 | 江苏中宜金大环保技术发展有限公司 | Denitrification filter tank and operation method thereof |
| CN107055754A (en) * | 2017-01-24 | 2017-08-18 | 河海大学 | A kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas |
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| CN109231493A (en) * | 2018-10-26 | 2019-01-18 | 浙江海洋大学 | A kind of low C/N high ammonia-nitrogen wastewater processing unit |
| CN109437392A (en) * | 2018-11-23 | 2019-03-08 | 河海大学 | A kind of circulation static bed biomembrane reactor with elastic filler |
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| CN114044573A (en) * | 2021-12-06 | 2022-02-15 | 北京东方启源环保科技有限公司 | Dynamic circulation anaerobic ammonium oxidation biological denitrification system |
| CN115259349A (en) * | 2022-07-12 | 2022-11-01 | 惠州学院 | Novel internal circulation biological aerated filter and wastewater aeration method thereof |
| CN116655183A (en) * | 2023-07-05 | 2023-08-29 | 贵州大学 | Acid mine wastewater treatment device |
| CN116655183B (en) * | 2023-07-05 | 2024-02-27 | 贵州大学 | Acid mine wastewater treatment device |
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