CN100532291C - Intensified denitrified phosphorous-removal sequencing batch membrane bioreactor technique - Google Patents
Intensified denitrified phosphorous-removal sequencing batch membrane bioreactor technique Download PDFInfo
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- CN100532291C CN100532291C CNB2007100114572A CN200710011457A CN100532291C CN 100532291 C CN100532291 C CN 100532291C CN B2007100114572 A CNB2007100114572 A CN B2007100114572A CN 200710011457 A CN200710011457 A CN 200710011457A CN 100532291 C CN100532291 C CN 100532291C
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000012528 membrane Substances 0.000 title claims description 51
- 238000012163 sequencing technique Methods 0.000 title claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000010802 sludge Substances 0.000 claims abstract description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 9
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 9
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims description 18
- 239000011574 phosphorus Substances 0.000 claims description 18
- 238000005273 aeration Methods 0.000 claims description 14
- 238000010992 reflux Methods 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 239000002562 thickening agent Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000012510 hollow fiber Substances 0.000 claims description 2
- 230000001546 nitrifying effect Effects 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 241000894006 Bacteria Species 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 2
- 230000000379 polymerizing effect Effects 0.000 abstract 2
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000011368 organic material Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- BDERTNYBILRFIU-UHFFFAOYSA-N [N].N.[P] Chemical compound [N].N.[P] BDERTNYBILRFIU-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a sequence batch type film bioreactor craft to reinforce denitrifying dephosphorize in sewage disposal and middle water reclaimed technical domain of environmental engineering, which comprises the following steps: cascading anaerobic or anoxybiotic reactor and sequence batch type film bioreactor; using inflow COD to complete the storage of PHB and relive phosphorous; polymerizing phosphoric bacterium under the anaerobic condition of the anaerobic or anoxybiotic reactor; proceeding aerobic nitrated and degraded organic material; yielding water at the same time; mixing the polyphosphoric sludge enriched with PHB and the nitrated liquid enriched with nitrate in the two reactor through sludge diversion and nitrated liquid backflow; removing nitrogen; polymerizing the phosphoric bacterium; choosing nitrate as electron acceptor; excess-absorbing phosphor; realizing synchronous denitrification dephosphorize without adding carbon source and nitrate. This invention possesses simple flow process and convenient management, which can be fit for disposing urban sewage with low carbon and high nitrogen phosphor.
Description
Technical field
The invention belongs to field of environment engineering technology, relate to sewage disposal and technology of middle water recycle, particularly membrane biological reactor process is at the method for the synchronous denitrification dephosphorizing function realization of low COD, high ammonia nitrogen phosphorus-containing wastewater.
Background technology
China is one of 13 poor-water states in the world, is the water resources of saves valuable, and middle water reuse is one of effective way.The regenerated sewage that nitrogen and phosphorus content is high will cause following main harm when being back to industrial colling, industrial process waters or municipal miscellaneous water: make the receiving water body eutrophication; Cause water pipe, watering equipment breeding biofouling, thereby result in blockage or influence efficient; Increase disinfectant consumption, when improving water producing cost, reduce water quality safety.In " integrated wastewater discharge standard " (GB18918-2002), town sewage second-stage treatment plant effluent water quality phosphoric acid salt≤0.5mg/L has been proposed, the strict demand of ammonia nitrogen≤5mg/L.
Need relate to nitrated, denitrification simultaneously and release phosphorus and put a plurality of biological processes of phosphorus based on the sewage treatment process of traditional denitrogenation dephosphorizing theory, therefore be difficult to take into account simultaneously denitrogenation and dephosphorization in actual applications, exist in substrate competition, the returned sluge nitrate to the drawbacks such as inhibition of anaerobic phosphorus release, thereby technical process complexity, energy consumption height, not easy to operate, relatively poor with the second pond supernatant liquor as effluent quality, water reuse in can not realizing.And UCT and MUCT technology that Cape Town, RSA university proposes are back to anoxic pond with mud, have stoped nitrate to enter anaerobic pond effectively and influence and release the phosphorus process in the anaerobic environment, for the further investigation of denitrogenation dephosphorizing provides direction.
The denitrification dephosphorization technology is meant utilizes the denitrification phosphorus-collecting bacterium with NO
3 -Be electron acceptor(EA), realize denitrification denitrogenation and dephosphorization function by " carbon is dual-purpose " mode, save 50% and 30% the COD and the consumption of oxygen respectively, corresponding minimizing surplus sludge volume 50% can also be avoided the single CO of being converted into of COD
2, make to be discharged into atmospheric CO
2Amount obviously reduces., be described as continuable sewage disposal technology.
Domestic and international research proves, with the membrane biological reactor process of membrane filtration and biological degradation combination is a kind of efficient, practical sewage disposal and technology of middle water recycle, but membrane bioreactor denitrogenation dephosphorizing scarce capacity can't satisfy the water quality requirement of increasingly stringent.
Summary of the invention
The purpose of this invention is to provide a kind of method that makes membrane bioreactor have the denitrogenation dephosphorizing function, with this method design-and-build membrane bioreactor, to make it not only have all advantages of membrane bioreactor, and realization does not need the outer denitrification dephosphorization of throwing carbon source and nitrate, can fully effectively remove the nitrogen and phosphorus pollution material, cut down the consumption of energy simultaneously, save cost, simple to operate, be easy to realize.
Realize that the technical scheme that makes membrane bioreactor have the denitrogenation dephosphorizing function of the present invention is:
The sequencing batch membrane bioreactor of intensified anti-nitrated phosphorous-removal by equalizing tank, detest/anoxic reacter, sequencing batch membrane bioreactor and four pond bodies of sludge thickener form; Detest/set up the 1st stirrer in the anoxic reacter, the 1st stirrer is in normally open; The sequencing batch membrane bioreactor bottom is provided with bubble aeration device in the inversed umbrella type, and the gas blower aeration is arranged.
The operation of this process cycle is detested/anoxic reacter utilizes the start-stop mode and the working time of fluid level controller and time controller control inlet water lifting pumps and mud guide pump, realize anaerobism and anaerobic environment alternately; In sequencing batch membrane bioreactor,, realize aerobic and alternate cycles anaerobic environment by the start-stop mode and the working time of time controller control gas blower, water outlet suction pump, sludge reflux pump and the 2nd stirrer.
Cycle is initial, detest/anoxic reacter in, inlet water lifting pumps is intake with big flow, in the as far as possible short time, makes to detest/the anoxic reacter water level returns to top water-level, stopped by fluid level controller control inlet water lifting pumps; Detest/the anoxic reacter anaerobic stages time, it in membrane bioreactor aerobic stage, water outlet suction pump suction water outlet, while gas blower aeration, produce bubble by bubble aeration device in the inversed umbrella type, in abundant disturbance film silk, decelerating membrane pollution, active sludge provides competent oxygen in sequencing batch membrane bioreactor, makes it be in oxygen condition.
When gas blower stops aeration, the water outlet suction pump stops, the 2nd stirrer and mud guide pump, sludge reflux pump start synchronously, in the short as far as possible time, the poly-phosphorus sludge that is rich in PHB mixes at two reactors respectively mutually with the nitrifying sludge mixed solution that is rich in nitrate, detest/anoxic reacter and sequencing batch membrane bioreactor enter the anoxic stage synchronously, carry out denitrification dephosphorization.
After anoxic suction phosphorus is finished, the mud guide pump starts, the poly-phosphorus sludge that is rich in poly-phosphorus is transferred to by sequencing batch membrane bioreactor detest/carry out anaerobic phosphorus release in the anoxic reacter to store PHB, control by time controller, inlet water lifting pumps, water outlet suction pump and the same step restart of gas blower, the new cycle begins.
Regularly open valve on the branch road at the gas blower aeration phase, phosphorous excess sludge drains into sludge thickener by airlift pump in the sequencing batch membrane bioreactor, and supernatant liquor returns equalizing tank and handles.
Membrane module adopts External Pressure Type polyethylene hollow fiber film in the sequencing batch membrane bioreactor, and membrane pore size is 0.1 μ m, and by water outlet suction pump effect water outlet, vacuum meter detects the water outlet working pressure.
Effect of the present invention and benefit are that technical process is simple, have realized complete automatic operation convenient management, the setting of two reactors and saved one the cover return-flow system, simplified MUCT technology; Dephosphorization mode with the poly-phosphorus of denitrification phosphorus-collecting bacterium has reduced oxygen-consumption and sludge yield; Adopt the membrane filtration effluent quality safe and reliable, water reuse water quality requirement in satisfying is applicable to the municipal sewage treatment of low-carbon high-nitrogen phosphorus.
Description of drawings
Fig. 1 is the sequencing batch membrane bioreactor technique plot plan of intensified anti-nitrated phosphorous-removal.
Among the figure: 1 equalizing tank, 2 detest/anoxic reacter, 3 gas blowers, 4 concentration basins, 5 membrane modules, 6 membrane bioreactors, 7 sludge reflux pumps, 8 mud guide pumps, 9 water outlet suction pumps.
Fig. 2 is the sequencing batch membrane bioreactor technique facade layout drawing (A-A ' section) of intensified anti-nitrated phosphorous-removal.
Among the figure: 1 equalizing tank, 2 detest/anoxic reacter, and 10, lift pump, the 11, the 1st stirrer (detesting/anoxic reacter).
Fig. 3 is the sequencing batch membrane bioreactor technique facade layout drawing (B-B ' section) of intensified anti-nitrated phosphorous-removal.
Among the figure: 3 gas blowers, 4 concentration basins, 5 membrane modules, 6 membrane bioreactors, 9 water outlet suction pumps, bubble aeration device in 12 inversed umbrella types, 13 vacuum meters, 14 valves, 15 airlift pumps, 16 the 2nd stirrers (MBR).
Embodiment
Most preferred embodiment below in conjunction with technical scheme and accompanying drawing detailed description the inventive method and device.
Embodiment
This technology is fit to handle C/N than the high ammonia nitrogen of low-carbon (LC) about 6:1, and TP is 9～15mg/L sanitary sewage, and setting-up time rly. cycle this moment is 3 hours.If the C/N ratio is lower than 6:1, then prolongs loop cycle or improve reflux ratio.
Stirrer 11 is often opened.Lift pump 10, suction pump 9 and gas blower 3 start synchronously, and this stage detests/anoxic pond 2 water inlets, in the short as far as possible time, makes reaction tank 2 water levels return to top water-level, and this is an anaerobic stages; Membrane bioreactor 6 water outlets simultaneously, membrane bioreactor 6 water levels descend.After 2 hours, by time relay control, suction pump 9 and gas blower 3 are out of service, meanwhile, mud guide pump 8 starts synchronously with sludge reflux pump 7, in the time of as far as possible lacking, mud guide pump 8 with the muddy water mixed solution after the anaerobism by detest/anoxic reacter 2 is transferred in the membrane bioreactor 6; The muddy water mixed solution that sludge reflux pump 7 will be rich in nitrate be transferred to by membrane bioreactor 6 detest/anoxic reacter 2 in.After mud shifted and to finish, stirrer 16 was opened by time relay control, made that mud is in suspended state in the membrane bioreactor 6.After 1 hour, stirrer 16 is stopped by time relay control, and sludge reflux pump 7 is opened again, the short period of time is interior muddy water mixed solution is transferred to by membrane bioreactor 6 detest/anoxic reacter 2 in.Lift pump 10, suction pump 9 and gas blower 3 are restarted, and finish a loop cycle.During the gas blower aeration, regularly open valve 14, phosphorous excess sludge drains into sludge thickener 4 by airlift pump 15, and mud concentrates at the bottom of the pond, and supernatant liquor returns equalizing tank 1 and handles.Robot control system(RCS) of the present invention is simple, is easy to realize, can make membrane bioreactor have splendid denitrogenation dephosphorizing ability.
Claims (2)
1. the sequencing batch membrane bioreactor technique of an intensified anti-nitrated phosphorous-removal is characterized in that:
A) sequencing batch membrane bioreactor of intensified anti-nitrated phosphorous-removal by equalizing tank (1), detest/anoxic reacter (2), sequencing batch membrane bioreactor (6) and (4) four pond bodies of sludge thickener and form; Detest/anoxic reacter and set up the 1st stirrer (11) in (2); Sequencing batch membrane bioreactor (6) bottom is provided with bubble aeration device (12) in the inversed umbrella type, by gas blower (3) aeration;
B) start-stop mode and working time that (2) utilize fluid level controller and time controller control inlet water lifting pumps (10) and mud guide pump (8) are detested/anoxic reacter in this process cycle operation, realize replacing of anaerobism and anaerobic environment; In sequencing batch membrane bioreactor (6),, realize aerobic and alternate cycles anaerobic environment by the start-stop mode and the working time of time controller control gas blower (3), water outlet suction pump (9), sludge reflux pump (7) and the 2nd stirrer (16);
C) cycle initial, detest/anoxic reacter in (2), inlet water lifting pumps (10) is intake with big flow, in the as far as possible short time, makes to detest/anoxic reacter (2) water level to return to top water-level, is stopped by fluid level controller control inlet water lifting pumps (10); Detest/anoxic reacter (2) anaerobic stages time, in sequencing batch membrane bioreactor (6), be aerobic stage, water outlet suction pump (9) suction water outlet, while gas blower (3) aeration, produce bubble by bubble aeration device (12) in the inversed umbrella type, in abundant disturbance film silk, decelerating membrane pollution, active sludge provides competent oxygen in sequencing batch membrane bioreactor (6), makes it be in oxygen condition;
D) gas blower (3) is when stopping aeration, water outlet suction pump (9) stops, the 2nd stirrer (16) starts synchronously with mud guide pump (8), sludge reflux pump (7), in the short as far as possible time, the poly-phosphorus sludge that is rich in PHB mixes at two reactors respectively mutually with the nitrifying sludge mixed solution that is rich in nitrate, detest/anoxic reacter (2) and sequencing batch membrane bioreactor (6) and enter the anoxic stage synchronously, carry out denitrification dephosphorization;
E) after anoxic suction phosphorus is finished, mud guide pump (8) starts, the poly-phosphorus sludge that is rich in poly-phosphorus is transferred to by sequencing batch membrane bioreactor detest/carry out anaerobic phosphorus release in the anoxic reacter (2) to store PHB, control by time controller, inlet water lifting pumps (10), water outlet suction pump (9) and the same step restart of gas blower (3), the new cycle begins;
F) regularly open valve on the branch road (14) at gas blower (3) aeration phase, phosphorous excess sludge drains into sludge thickener (4) by airlift pump (15) in the sequencing batch membrane bioreactor (6), and supernatant liquor returns equalizing tank (1) and handles;
G) the 1st stirrer (11) is in normally open.
2. the sequencing batch membrane bioreactor technique of a kind of intensified anti-nitrated phosphorous-removal according to claim 1, it is characterized by: the interior membrane module of sequencing batch membrane bioreactor (6) (5) adopts External Pressure Type polyethylene hollow fiber film, membrane pore size is 0.1 μ m, by water outlet suction pump (9) effect water outlet, vacuum meter (13) detects the water outlet working pressure.
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| CNB2007100114572A CN100532291C (en) | 2007-05-25 | 2007-05-25 | Intensified denitrified phosphorous-removal sequencing batch membrane bioreactor technique |
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| CNB2007100114572A CN100532291C (en) | 2007-05-25 | 2007-05-25 | Intensified denitrified phosphorous-removal sequencing batch membrane bioreactor technique |
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| US20220127173A1 (en) * | 2020-10-26 | 2022-04-28 | Northwest A&F University | System and method for total volume treatment of landfill leachate and use thereof |
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| CN101851022B (en) * | 2010-02-10 | 2012-09-26 | 诺卫环境安全工程技术(广州)有限公司 | Short-distance nitration membrane biological reactor process and processing device thereof |
| CN102010059B (en) * | 2010-10-25 | 2013-01-16 | 哈尔滨工程大学 | Device and method for membrane separation sewage treatment and recycling as well as microporous aeration |
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| CN104556605A (en) * | 2013-10-20 | 2015-04-29 | 侯双成 | Novel technology for removing nitrogen and phosphorus with two-sludge method |
| CN103755025B (en) * | 2013-12-25 | 2015-05-13 | 中国矿业大学 | Double-membrane double-circulation sewage treatment process for enhancing denitrifying phosphorus removal |
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| CN109019860A (en) * | 2018-07-31 | 2018-12-18 | 济南大学 | A kind of device and method of synchronous nitration and denitrification film-biofilm reactor processing municipal wastewater |
| CN111908705B (en) * | 2020-06-18 | 2022-07-19 | 北京绿都浩天环保科技有限公司 | Nitrogen and phosphorus removal process based on multi-effect medical sewage treatment |
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| US20220127173A1 (en) * | 2020-10-26 | 2022-04-28 | Northwest A&F University | System and method for total volume treatment of landfill leachate and use thereof |
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