CN102180542B - Rapid and stable operation method of authigene dynamic membrane component - Google Patents
Rapid and stable operation method of authigene dynamic membrane component Download PDFInfo
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- CN102180542B CN102180542B CN2011100838621A CN201110083862A CN102180542B CN 102180542 B CN102180542 B CN 102180542B CN 2011100838621 A CN2011100838621 A CN 2011100838621A CN 201110083862 A CN201110083862 A CN 201110083862A CN 102180542 B CN102180542 B CN 102180542B
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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
Abstract
The invention relates to a rapid and stable operation method of an authigene dynamic membrane component. The method is characterized in that flux which is 2-6 times of operation flux is adopted at the preliminary stage of dynamic membrane formation so as to achieve rapid membrane formation within 3-5 minutes; after a dynamic membrane is formed, normal operation is carried out so as to reduce overcurrent flux, wherein the flux which is 0.8-0.95 time of critical flux is maintained for operation; and bottom aeration, reverse aeration and reverse union gap and/or impulse rinse are adopted for gas and water washing, thereby overcoming the inherent defects of long dynamic membrane formation time, short high-flux effective filtration time and poor washing effect, achieving industrial operation and clearing away the obstruction for the industrial operation of the authigene dynamic membrane component.
Description
Technical field
The present invention relates to a kind ofly can to guarantee that early stage water outlet is up to standard fast, steady running flux large period is long, backwash speed is fast cleans thoroughly that effective self-generative dynamic membrane component reaches the steady running method fast.
Background technology
Dynamic Membrane (Dynamicmem-brane) is for through forming a kind of new membrane assembly that sludge blanket plays accurate crown_interception on film base material surface, wherein self-forming dynamic membrane is in filtration procedure, to be accumulated for class coating material by mud flco (mikrobe and meta-bolites thereof) to form rete.Its formation time and thickness and living weight etc. are closely related with operational conditions, have reported in literature mud flco cumulative speed to be about 0 ~ 50g/ (m
2H); Thereby " rete " forms relatively slow and is difficult to stablize; Cause the Dynamic Membrane formation time longer, do not wait at 30 minutes to several hours usually, thus initial stage water quality be difficult to meet the demands (effectively filteration only be formed up to the effect of certain thickness competence exertion) at sludge blanket; Can only adopt big quantity of reflux to film forming, thereby increase Qian Dao pond load; Secondly, Dynamic Membrane increases too fastly because of high sludge concentration is prone to rete when operation, causes effluent flux to descend, effectively the cycle of operation shorter relatively, and lack effective measure of control; Besides, Dynamic Membrane backwash weak effect, the effluent flux recovery rate is low, causes normal water production rate little, is easy to produce irreversible pollution after the time is long, causes medicine to be washed frequently, has increased running cost and complicated operation degree.This three big defective becomes the restriction self-generative dynamic membrane component and effectively utilizes major obstacle.
Tongji University, 2005 [bioreactor of dynamic membrane technical studies] propose that (＞0.85m/h) water outlet 2 ~ 4min, back water outlet under small throughput＜0.3m/h slightly reaches fast filming with high-throughput.Still adopt the high-throughput water outlet after its film forming, too densification and stabilized flux falls sharply of the Dynamic Membrane that is prone to make formation, steady time the short 8 ~ 12h that is generally.Tongji University; 2007 [preliminary study of efficient self-forming dynamic membrane technology]; Proposed varying head, flexible amount operation scheme, promptly utilized the high initial flux (0.6 ~ 0.7 m/h) that increases of initial liquid level, extension film success back is leaned on water level to descend and is turned down steady running flux (0.05 ~ 0.06 m/h) automatically.The early stage big flux of this method film forming is to realize through raising liquid level, keeps required flux through reducing liquid level after the film forming, and making biochemistry pool build volume increases greatly, has reduced the effective rate of utilization that the pond holds; Secondly, become membrane flux to reach more than 10 times with the operating flux gap is excessive, the Dynamic Membrane of formation is densification too, be difficult for long-term stable operation, and the steady running flux lacks measuring method accurately.
Chinese patent CN 1168680C bioreactor of dynamic membrane filters the formation Dynamic Membrane thereby adopt the following waterhead of 20cm to drive; When the film pollution occurring, remove film surface pollution through strengthening face cross-flow flow velocity mode.This method not only forms the slow shortcoming of Dynamic Membrane and still exists; And clean film surface pollution through strengthening the crossflow velocity mode, and can only reach the regeneration of film surface cleaning, be difficult to reach ideal effect for being accumulated in the inner blocking pollution of fenestra, cause film effectively to utilize the cycle short.
Chinese patent CN 100349805C Dynamic Membrane micro-filtration membrane module and water treatment process method.Membrane module is placed mixed solution, under the certain surface cross-flow, mikrobe is adhered in screen surface form Dynamic Membrane.The backwash mode is to carry out hydraulic reverse after bubble washes away to wash.This method only relies on surface adsorption to form Dynamic Membrane, and speed is very slow; Bubble washes away can remove Dynamic Membrane surface cake layer, and the water backwash is removed in the fenestra and stopped up.Because Dynamic Membrane base material aperture is bigger, waterpower backwash water loss can be very big, and need big pressure, causes the cleaning energy consumption higher, and the actual externally output water yield reduces a lot.
Chinese patent CN 100558655C bioreactor of dynamic membrane backwash operation method when the needs backwash, is closed water outlet, adopts reversed reaction device water outlet direction to carry out aeration, makes gas pass through water outlet and gets into membrane module, and intensity is 1.6 ~ 8.0 m
3/ (m
2H), the backwash time is 5 ~ 15min.Continuously reverse aerating backwash reduces because of cleaning causes film to stop up gradually, is difficult to guarantee cause the air purge anaphase effect to reduce in air purge high pressure difference inside and outside the base material in the time, makes that whole backwash effect is undesirable.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art; Provide a kind of film formation time short; Can guarantee that early stage water outlet is up to standard fast, big flux stabilized long operational time, the thorough effective self-generative dynamic membrane component of the fast cleaning of speed reaches the steady running method fast during backwash.
The object of the invention realizes; Main to improve one be to form the initial stage in Dynamic Membrane, strengthened circulation (for example for the 2-6 of normal filtration flux doubly), holds back sludge quantity and reach fast filming by strengthening the flux increase; Short because of film formation time, it is little to adjusting or biochemistry pool influence to reflux; The 2nd, when after Dynamic Membrane forms, changing the normal filtration operation over to; Reduced circulation to being slightly less than (0.8-0.95 doubly) critical flux state; In the cleaning frequency that keeps prolonging under the high flux Dynamic Membrane, overcome to be normally operated in and caused short deficiency of the cycle of operation more than the critical flux; The 3rd, utilize when cleaning bottom aeration, reverse aerating and reverse water inlet to unite to carry out the gap and/or pulsed is cleaned in that needs are counter; The bottom aeration washes away substrate surface; Reverse aerating, reverse water inlet adopt gap and/or pulsed to clean; Help remaining on the inside and outside high pressure differential of base material in the air purge time; Improved cleaning performance; Thereby realize the fast filming of Dynamic Membrane initial operating stage; And big flux long-period stable operation after the film forming; And clean thoroughly effective; Overcome the deficiency of prior art, realized the object of the invention.Specifically, self-generative dynamic membrane component of the present invention reaches the steady running method fast, it is characterized in that 2-6 times of flux of Dynamic Membrane formation initial stage employing operating flux realized 3-5 minute fast filming; Change normal operation after Dynamic Membrane forms over to and reduced circulation, keep 0.8-0.95 times of critical flux operation of flux; Gas, water clean and adopt bottom aeration, reverse aerating and reverse water inlet associating gap and/or pulsed to clean.
Critical flux; After forming in Dynamic Membrane; Measure the water flow under the different water outlet pressure heads, convert and be the average film flux, draw the membrane flux curve under the different water outlet pressure heads; The obvious pairing membrane flux value of flex point is the critical flux of this Dynamic Membrane in the curve, and promptly critical flux adopts working curve method to measure.Test shows, obviously shortens if long-time running more than critical flux, then moves the cleaning interval; And operating in below the critical flux morely, aquifer yield is just big to be reduced.And test also shows, same sewage, same bioreactor of dynamic membrane, and the critical flux after each the cleaning is roughly approaching, therefore for concrete application, only needs to measure once, thereby has very strong operation implementation.
Bottom aeration, reverse aerating and reverse water inlet associating gap and/or pulsed are cleaned, and the bottom aeration is mainly used in and washes away substrate surface, removes the substrate surface pollutent; Reverse aerating, reverse water inlet, the reverse impact power of formation helps going out embedding the inner pollutent of film base material.The three cooperates and has improved cleaning performance, cleans thoroughly.Reverse aerating, reverse water inlet both can adopt the gap to carry out, and also can adopt strong and weak pulse to carry out; Can also both mixing carry out, though because of causing film to stop up gradually, cleaning reduces like this, because reverse aerating, reverse water inlet employing gap and/or pulsed; Help remaining on the inside and outside high pressure differential of base material in the air purge time; Thereby guarantee high cleaning performance, the steady running flux is big, and the cycle of operation is long continuously.
Dynamic Membrane forms the big flux at initial stage, can be through two flowing water Valves up and down be set on membrane module, and primary starting is opened low level valve (forming big liquid level difference) thereby has been strengthened effluent flux, and the low level valve is closed in the normal operation of film forming, opens former normal valve; Also can through regulating the flow of water outlet suction pump, realize the big flux at film forming initial stage through the water outlet suction pump is set.The present invention better adopts two valve mechanisms up and down is set, and for example below normal flowing water Valve, sets up a valve, realizes the big flux at film forming initial stage.
Initial stage one-tenth membrane flux is 2-6 a times of normal operating flux; And operating flux is a 0.8-0.95 times of critical flux; For the present invention tests preferable interval; If crossing the circulation multiple reduces; Only being to prolong film formation time, crossing the circulation multiple and increase, is favourable though film formation time is shortened; But the test discovery can cause Dynamic Membrane too fine and close and cause flux to descend and shorten filter cycle, confirms that therefore 2-6 doubly is suitable interval.Same operating flux is that 0.8-0.95 times of critical flux is also interval for optimizing, and it is not the accurate end value on the mathematical meaning that obvious technician can understand this interval.
Self-generative dynamic membrane component of the present invention reaches the stable operation method fast; With respect to prior art; Because the film forming initial stage is adopted big flux overcurrent (big flux start-up mode); Thereby shortened the Dynamic Membrane formation time greatly; Can reach effective filtration film forming in 3-5 minute; Can reduce the engineering debug time, and because film formation time is short, the initial stage refluxes little to adjusting or biochemistry pool influence; A little less than critical flux operation, can make bioreactor of dynamic membrane stablize the high flux cycle of operation and prolong, promptly the high flux cycle of operation long, the minimizing cleaning operation; Gas, water clean and adopt bottom aeration, reverse aerating and reverse water inlet associating gap and/or pulsed to clean; It is fast to clean thorough speed, promotes Dynamic Membrane greatly and removes effect, and operating flux is big; Cleaning frequency is long, has solved industrialization and has moved the short difficult problem of actual effective run time.
Below in conjunction with two specific embodiments, essence of the present invention is further understood in exemplary illustration and help, but the embodiment detail only is for the present invention is described; Do not represent the present invention to conceive whole technical schemes down; Therefore should not be construed as the technical scheme qualification total to the present invention, some are In the view of the technician, and the unsubstantiality that does not depart from the present invention's design increases and/or change; For example simple the change or replacement of technical characterictic to have same or similar technique effect all belongs to protection domain of the present invention.
Embodiment
Embodiment 1: test water quality: COD280 ~ 400mg/L, BOD
5Be 180 ~ 260 mg/L, ammonia nitrogen 16 ~ 32 mg/L.Adopt the external placed type self-generative dynamic membrane component, amount to 4m
2
At first in disposing of sewage, add the 0.2g/L active sludge, progressively cultivate, activated sludge concentration reaches about 1.0mg/L behind the 7d, starts dynamic film component.Earlier use flux to hang film as the 900L/h aquifer yield, effluent recycling to front end biochemistry pool, Dynamic Membrane forms behind the 3min, and delivery turbidity is 3NTU.Through measuring Dynamic Membrane critical flux 80 L/m that form
2H, (the conversion membrane flux is 75L/m to 300L/h to turn down flow
2H) normal operation, the effluent aeration is adopted in operation, and keeping the cross-flow flow velocity is 3.0 cm/s.Effluent flux drops to 60L/m behind the 50h
2H starts online aqueous vapor and washes, and bottom aeration, reverse aerating combine the strong and weak pulse 10min of reverse water inlet (detecting flux returns near original)." regeneration-operation-cleaning " process of repetition is moved 40 days.After 40 days, carry out the maintainability matting, use the 0.2wt% Youxiaolin to carry out 30min flushing sterilization, come into operation once more after the flushing with clean water.After the system operation 6 months, carry out restorative matting, with membrane module emptying, adopt the 0.5wt% Youxiaolin soak 8 hours, be interrupted aeration and wash away, flushing with clean water 1 hour is carried out pickling with 0.4wt% hydrochloric acid afterwards, the time is 2 hours, at last flushing with clean water.The process of repeated priming, operation, cleaning.
Embodiment 2: test water quality: COD160 ~ 300mg/L, BOD
5Be 110 ~ 210 mg/L, ammonia nitrogen 12 ~ 25mg/L.Adopt built-in self-generative dynamic membrane component, amount to 250m
2
At first in disposing of sewage, add the 0.2g/L active sludge, progressively cultivate, activated sludge concentration reaches about 1.2mg/L behind the 7d, starts dynamic film component.Earlier use flux to hang film as the 50T/h aquifer yield, effluent recycling to front end equalizing tank, Dynamic Membrane forms behind the 5min, and delivery turbidity is 5NTU.Through measuring Dynamic Membrane critical flux 90 L/m that form
2H turns down flow to 20T/h, and the conversion operating flux is 80L/m
2H adopts the effluent aeration, and keeping the cross-flow flow velocity is 3.0 cm/s.Effluent flux drops to 65L/m behind the 72h
2H starts online aqueous vapor and washes, and bottom aeration, reverse aerating combine reverse water inlet droped beat towards 15min." regeneration-operation-cleaning " process of repetition is moved 50 days.After 50 days, carry out the maintainability matting, use 0.2 wt% Youxiaolin to carry out 30min flushing sterilization, come into operation once more after the flushing with clean water.After the system operation 6 months, carry out restorative matting, with membrane module emptying, adopt the 0.5wt% Youxiaolin soak 5 hours, be interrupted aeration and wash away, flushing with clean water 1 hour is carried out pickling with 0.4% hydrochloric acid afterwards, the time is 1.5 hours, at last flushing with clean water.The process of repeated priming, operation, cleaning.
Comparative example: test water quality: COD280 ~ 400mg/L, BOD5 is 180 ~ 260 mg/L, ammonia nitrogen 16 ~ 32 mg/L.Adopt the external placed type self-generative dynamic membrane component, amount to 4m
2
At first in disposing of sewage, add the 0.2g/L active sludge, progressively cultivate, activated sludge concentration reaches about 1.0mg/L behind the 7d, starts dynamic film component.Use flux to carry out water outlet as 320L/h and hang film, water outlet effluxes, and Dynamic Membrane forms after 1 hour, and delivery turbidity is 3NTU.Operating flux is 85L/m
2H (critical flux 80 L/m
2H).Adopt the effluent aeration, keeping the cross-flow flow velocity is 3.0 cm/s.Effluent flux drops to 60L/m behind the 15h
2H starts online aqueous vapor and washes, the bottom aeration, and reverse aerating combines, altogether 40min." regeneration-operation-cleaning " process of repetition is moved 10 days.After 10 days, carry out the maintainability matting, use the 0.2wt% Youxiaolin to carry out 60min flushing sterilization, come into operation once more after the flushing with clean water.System's operation was carried out restorative matting, with membrane module emptying after 3 months; Adopt the 0.5wt% Youxiaolin soak 10 hours, be interrupted aeration and wash away, flushing with clean water 2 hours is carried out pickling with 0.4wt% hydrochloric acid afterwards; Time is 5 hours, last flushing with clean water.The process of repeated priming, operation, cleaning.Can know that by contrast it is long that conventional operation method Dynamic Membrane forms the slow time; Be higher than the critical flux operation, the cycle of operation is shorter; Common water-gas combined backwash speed is slower, and pollution accumulation is serious, and it is longer that follow-up medicine is washed the time.
To those skilled in the art, under this patent design and specific embodiment enlightenment, some distortion that can directly derive or associate from this patent disclosure and general knowledge; Those of ordinary skills will recognize also can adopt additive method, or uses substituting of known technology in the prior art always, and the equivalence of characteristic changes or modification; Mutual various combination between characteristic, for example initial stage operating flux different variations between 2-6 times, operating flux changes between 0.8-0.95 times of critical flux; Or summary exceeds this scope slightly; Or the like unsubstantiality change, can be employed equally, can both realize this patent representation function and effect; Launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Claims (4)
1. self-generative dynamic membrane component reaches the steady running method fast, it is characterized in that 2-6 times of flux of Dynamic Membrane formation initial stage employing operating flux realized 3-5 minute fast filming; Change normal operation after Dynamic Membrane forms over to and reduced circulation, keep 0.8-0.95 times of critical flux operation of flux; Gas, water clean and adopt bottom aeration, reverse aerating and reverse water inlet associating gap and/or pulsed to clean.
2. reach the steady running method fast according to the said self-generative dynamic membrane component of claim 1, it is characterized in that critical flux measured by working curve method.
3. reach the steady running method fast according to claim 1 or 2 said self-generative dynamic membrane components; It is characterized in that it is that two flowing water Valves up and down are set on membrane module that Dynamic Membrane forms the initial stage high-throughput, the initial stage opens the low level valve and forms big liquid level difference realization big flux of film forming initial stage.
4. reach the steady running method fast according to the said self-generative dynamic membrane component of claim 3, it is characterized in that the normal operation of film forming closes the low level valve, open former normal valve.
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| CN102180542B true CN102180542B (en) | 2012-07-25 |
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| CN102949874A (en) * | 2012-11-13 | 2013-03-06 | 北京碧水源膜科技有限公司 | Floccule self-filtering device and using method thereof |
| CN103638819B (en) * | 2013-12-19 | 2015-07-29 | 北京林业大学 | A kind of cleaning method for advanced treating waste incineration leachate type external tubular membrane |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3926799A (en) * | 1972-10-03 | 1975-12-16 | Us Interior | Support for dynamic membrane |
| US5269934A (en) * | 1992-10-06 | 1993-12-14 | Chevron Research And Technology Company | Removal of oily residues from aqueous waste streams |
| CN1807275A (en) * | 2005-12-30 | 2006-07-26 | 于容朴 | Dynamic micro filter membrane assembly and water treatment process method |
| CN101857304A (en) * | 2010-07-06 | 2010-10-13 | 深圳清华大学研究院 | Dynamic filtering-membrane bioreactor for sewage treatment and filtering method thereof |
-
2011
- 2011-04-03 CN CN2011100838621A patent/CN102180542B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3926799A (en) * | 1972-10-03 | 1975-12-16 | Us Interior | Support for dynamic membrane |
| US5269934A (en) * | 1992-10-06 | 1993-12-14 | Chevron Research And Technology Company | Removal of oily residues from aqueous waste streams |
| CN1807275A (en) * | 2005-12-30 | 2006-07-26 | 于容朴 | Dynamic micro filter membrane assembly and water treatment process method |
| CN101857304A (en) * | 2010-07-06 | 2010-10-13 | 深圳清华大学研究院 | Dynamic filtering-membrane bioreactor for sewage treatment and filtering method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴盈禧等.高通量自生动态膜生物反应器的运行特性.《中国给水排水》.2004,第20卷(第02期),第6页左栏第1行-第7页右栏结尾. * |
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