CN103936138A - Aeration system of MBR (Membrane Bio-Reactor) membrane module and control method of aeration system - Google Patents
Aeration system of MBR (Membrane Bio-Reactor) membrane module and control method of aeration system Download PDFInfo
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- CN103936138A CN103936138A CN201410189713.7A CN201410189713A CN103936138A CN 103936138 A CN103936138 A CN 103936138A CN 201410189713 A CN201410189713 A CN 201410189713A CN 103936138 A CN103936138 A CN 103936138A
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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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Abstract
The invention discloses an aeration system of an MBR (Membrane Bio-Reactor) membrane module and a control method of the aeration system, and aims to solve the problem of easily-caused environment pollution or high aeration energy consumption or short service life of the MBR membrane module in the traditional aeration system of the MBR membrane module. The aeration system of the MBR membrane module comprises an MBR aeration manifold, an upper-layer aeration manifold, a lower-layer aeration manifold, a plurality of upper-layer aeration branch pipes and a plurality of lower-layer aeration branch pipes, wherein the MBR aeration manifold is arranged in an MBR tank; the upper-layer aeration manifold and the lower-layer aeration manifold are communicated with the MBR aeration manifold; the plurality of upper-layer aeration branch pipes are communicated with the upper-layer aeration manifold; the plurality of lower-layer aeration branch pipes are communicated with the lower-layer aeration manifold; the plurality of upper-layer aeration branch pipes are located on the same horizontal plane which is 400-450mm far away from the bottom of the MBR tank; the plurality of lower-layer aeration branch pipes are located on the same horizontal plane which is 150-250mm far away from the bottom of the MBR tank. The aeration system disclosed by the invention can be used for effectively controlling membrane pollution by using relatively low air flow.
Description
Technical field
The present invention relates to a kind of MBR membrane module aerating system and control method.
Background technology
MBR membrane bioreactor is that activated sludge process and membrane separation technique are combined, and replaces the sewage disposal novel method of second pond in traditional conventional activated sludge method with membrane separation technique.Many advantages such as compared with traditional activated sludge process, it is good and stable that it has effluent quality, and excess sludge production is few, and floor space is little, be easy to install, and operation is convenient.Meanwhile, in actual application, also have some problems, as easy pollution, energy consumption is high, and the life-span is relatively short etc.
The method that controlling diaphragm pollutes has a lot, and wherein, a kind of topmost method is to utilize continuous aeration to wash away film surface.The effect of polluting in order to reach controlling diaphragm, the needed air capacity of aeration is at least 20:1 with the ratio of processing the water yield, thereby causes operation energy consumption greatly to increase.By the operation energy consumption of actual MBR engineering is analyzed to discovery, aeration energy consumption at least accounts for 80% left and right of total energy consumption.In addition, aeration intensity is excessive, also there will be the problems such as film silk fracture, thereby has affected the work-ing life of MBR film.Therefore, under the prerequisite that effectively controlling diaphragm pollutes, how to reduce the focus that aeration rate is research.
At present, by research and the summary to engineering experience, mainly contain the method for following several reduction aeration rates: the one, intermittent aeration replaces continuous aeration, utilize air pulse to clean film, thereby reduce the energy consumption of aerating system, reduce operation and maintenance cost, but this method there is certain limitation, when some MBR film operation, must carry out continuous aeration.Another kind method is that membrane module aeration divides long-time low intensity aeration and short period of time superstrength aeration, and result shows: the aeration energy consumption that can reduce 5%-8% under the prerequisite that does not affect effluent quality and membrane flux.The problem that this method exists is, in the time of actual motion, comparatively to bother for the concrete air capacity of how to confirm low intensity aeration and superstrength aeration; And Fan Selection must meet the requirement of superstrength aeration, increase to a certain extent facility investment; In addition, superstrength aeration also can have a certain impact for the life-span of film silk.
Summary of the invention
In order to overcome existing MBR membrane module aerating system or easily polluted membrane pollution, or aeration energy consumption is high, or cause short deficiency of MBR membrane module life-span, and the present invention aims to provide a kind of MBR membrane module aerating system and control method, and the less tolerance of this aerating system utilization can be polluted by effective controlling diaphragm.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of MBR membrane module aerating system, comprises the MBR aeration house steward who is placed in MBR pond; Its constructional feature is also to comprise that the upper strata aeration supervisor and the lower floor's aeration that are communicated with MBR aeration house steward be responsible for, and is responsible for upper strata aeration many upper strata aeration branch pipes that are communicated with, and is responsible for lower floor aeration the Duo Gen lower floor aeration branch pipe being communicated with; Many upper strata aeration branch pipes are positioned in the same level of 400mm ~ 450mm at the bottom of MBR pond, and Duo Gen lower floor aeration branch pipe is positioned in the same level of 150mm ~ 250mm at the bottom of MBR pond.
Thus, the MBR aeration house steward who is connected with pneumatic pump can realize the air feed to upper strata aeration supervisor and the aeration supervisor of lower floor, by upper strata aeration supervisor and lower floor's aeration are responsible for to air feed in turn, make to reduce aeration rate under the prerequisite of continuous aeration, reach the object of consumption reduction.
Be below the technical scheme of further improvement of the present invention:
In order to improve aeration effect, described upper strata aeration branch pipe is all consistent with the quantity of MBR membrane module with the quantity of lower floor's aeration branch pipe.
Preferably, the caliber of described upper strata aeration branch pipe and lower floor's aeration branch pipe is DN15.
In order to improve aeration effect, described upper strata aeration branch pipe and lower floor's aeration branch pipe be all positioned at MBR membrane module bottom header under.
Preferably, described upper strata aeration branch pipe apart from MBR pond at the bottom of 430mm, described lower floor aeration branch pipe apart from MBR pond at the bottom of 200mm.
For the convenient aeration of controlling, on described upper strata aeration supervisor, upper strata aeration tube pneumavalve is housed, on the aeration supervisor of described lower floor, lower floor's aeration tube pneumavalve is housed.
Further, between described upper strata aeration supervisor and the aeration supervisor of lower floor, be also provided with at least middle aeration supervisor of one deck, in the middle of each, aeration supervisor is communicated with described MBR aeration house steward, and in the middle of every layer, aeration supervisor is communicated with many middle aeration branch pipes that are positioned in same level.
For convenient understanding aeration rate, on described MBR aeration house steward, air flowmeter is housed.
To a method for above-mentioned MBR membrane module aerating system control, MBR membrane module filters and adopts the intermittently mode of water outlet, takes out and stops, than being 8min/2min, producing water 8min, stops producing water 2min, and 10min is that a product water is taken out the cycle of stopping; Be characterized in, described upper strata aeration supervisor and lower floor's aeration are responsible for cyclic aeration in turn, and it is consistent that upper strata aeration supervisor and the aeration supervisor's of lower floor aeration time change-over period and product water are taken out the cycle of stopping, upper strata aeration supervisor's aeration time is 6:4 with the ratio of the aeration supervisor's of lower floor aeration time, and the aeration supervisor of described lower floor aeration during the 2min of MBR membrane module while stopping producing water.
Thus, MBR membrane module aerating system of the present invention forms the operational mode of continuous aeration and the local intermittent pulse aeration of MBR membrane module of each MBR membrane module, both ensured that MBR membrane module can obtain washing away of air always, can utilize again the mode of air pulse to carry out disturbance to the different sites of film silk, therefore, utilize less tolerance to pollute by effective controlling diaphragm.
Further, described MBR membrane module carries out automatic clear water backwash, backwash time 30s ~ 60s while stopping water outlet.
By said structure, the present invention is by the aeration structure of MBR membrane module is improved, and designed a set of autocontrol method matching.Make to reduce aeration rate under the prerequisite of continuous aeration, operation operation is convenient, does not increase facility investment, when not affecting film work-ing life, can reduce aeration energy consumption.
Compared with conventional individual layer aeration, the beneficial effect of this aerating system is:
1, save air capacity 15 ~ 20%, account for 80% for the treatment of system total energy consumption according to MBR film aeration energy consumption, whole treatment system can reduce by 12% ~ 16% energy consumption;
2, aeration rate is less, is conducive to the prolongation in work-ing life of film silk;
3, aeration rate is little, and Fan Selection is corresponding to be reduced, and has saved facility investment;
4, every cover aerating system only need to increase an operated pneumatic valve and some aeration tubes, and the cost increasing is very little.
Below in conjunction with drawings and Examples, the present invention is further elaborated.
Brief description of the drawings
Fig. 1 is the structure principle chart of one embodiment of the invention;
Fig. 2 is the side-view of Fig. 1;
Fig. 3 is the front view of Fig. 1
In the drawings
1-MBR aeration house steward; 2-lower floor aeration tube pneumavalve; 3-upper strata aeration tube pneumavalve; The aeration house steward of 4-lower floor; 5-upper strata aeration house steward; 6-lower floor aeration branch pipe; 7-upper strata aeration branch pipe; 8-vapor pipe; 9-vent valve; 10-MBR membrane module; 11-header; 12-MBR membrane module support; 13-air flowmeter.
Embodiment
A kind of MBR membrane module aerating system, as Fig. 1, shown in 2,3, point upper and lower two-layer layout, lower floor's aeration tube, apart from 150 ~ 250mm at the bottom of pond, determines that a preferred value is 200mm, upper strata aeration tube, apart from 400 ~ 450mm at the bottom of pond, determines that a preferred value is 430mm.
Every layer of aeration tube comprises aeration house steward and aeration branch pipe, and house steward and arm adopt dendritic layout.Arm quantity is consistent with the quantity of membrane module, and be arranged on membrane module bottom header under.Aeration branch pipe caliber DN15, house steward's caliber is determined according to design tolerance.
Upper and lower two-layer aeration supervisor one end is connected with pneumatic pump, and every aeration house steward installs an operated pneumatic valve; The other end is connected with vapor pipe, and manual exhaust valve is set on vapor pipe, for the air of equipment debugging and emptying internal system.
This aerating system is fully automatic operation, and its control mode is: blower fan continuous gas entry, variable frequency control blower fan is in a suitable tolerance.Realize the cyclic aeration of upper and lower two-layer aerating system by the keying of operated pneumatic valve.Form the operational mode of continuous aeration and the local intermittent pulse aeration of MBR of each MBR film system.Both ensured that MBR film can obtain washing away of air always, and can utilize again the mode of air pulse to carry out disturbance to the different sites of film silk, and therefore, utilized less tolerance to pollute by effective controlling diaphragm.
MBR membrane filtration adopts the intermittently mode of water outlet, takes out and stops than 8min/2min, produces water 8min, stops producing water 2min, and 10min is a cycle.While stopping water outlet, carry out automatic clear water backwash, backwash time 30 ~ 60s.The aeration time change-over period of upper and lower two-layer aerating pipelines, to take out the cycle of stopping consistent with producing water, and upper strata aeration time is 6:4 with the ratio of lower floor's aeration time, and be the lower floor's aeration mode adopting during 2min while ensureing to stop producing water.
application example:
Process the water yield: sanitary sewage 100m
3/ d.
Influent quality: COD:500 ~ 600mg/L, BOD:200 ~ 300mg/L, NH3-NH4:30 ~ 40mg/L, SS:200 ~ 300mg/L.
Effluent quality: COD≤50mg/L, BOD≤10mg/L, NH3-NH4≤5mg/L, SS≤10mg/L.
Design variable and operational conditions: the technique that adopts acidication+MBR.Acidication submersible agitating acc power 0.25KW; MBR membrane cisterna suction pump power 1.1kw.Conventional MBR membrane cisterna gas-water ratio comprises MBR membrane module gas-water ratio 20:1 and biochemical gas-water ratio 8:1, and total gas-water ratio is 28:1, and the blower power needing is 3.0kw; Adopt novel MBR aeration clone system can make MBR membrane module gas-water ratio be down to 16:1 by 20:1, total gas-water ratio is 24:1, and the blower power needing is 2.2kw.
While adopting conventional MBR aeration, total operation power consumption of this treatment process is: 0.25+1.1+3=4.35kw, and ton water power consumption is 4.35kw.h/4.17t=1.04kw.h;
While adopting novel MBR aerating system, total operation power consumption of this treatment process is: 0.25+1.1+2.2=3.55kw, and ton water power consumption is 3.55kw.h/4.17t=0.85kw.h;
Save power consumption approximately 18.3%.Along with processing the increase of the water yield, the power consumption of saving also can increase.
Gas blower is variable frequency control, can suitably reduce or increase aeration rate according to the variation of dissolved oxygen, but aeration rate can not be 0.When stopping, blower fan can cause closing of water producing pipe automatic valve.
The content that above-described embodiment is illustrated should be understood to these embodiment only for being illustrated more clearly in the present invention, limit the scope of the invention and be not used in, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present invention.
Claims (10)
1. a MBR membrane module aerating system, comprises the MBR aeration house steward (1) who is placed in MBR pond; Characterized by further comprising the upper strata aeration supervisor (5) and the aeration supervisor of lower floor (4) that are communicated with MBR aeration house steward (1), the many upper strata aeration branch pipes (7) that are communicated with upper strata aeration supervisor (5), and the Duo Gen lower floor aeration branch pipe (6) being communicated with the aeration supervisor of lower floor (4); Many upper strata aeration branch pipes (7) are positioned in the same level of 400mm ~ 450mm at the bottom of MBR pond, and Duo Gen lower floor aeration branch pipe (6) is positioned in the same level of 150mm ~ 250mm at the bottom of MBR pond.
2. MBR membrane module aerating system according to claim 1, is characterized in that, the quantity of described upper strata aeration branch pipe (7) and lower floor's aeration branch pipe (6) is all consistent with the quantity of MBR membrane module (10).
3. MBR membrane module aerating system according to claim 1, is characterized in that, the caliber of described upper strata aeration branch pipe (7) and lower floor's aeration branch pipe (6) is DN15.
4. MBR membrane module aerating system according to claim 1, is characterized in that, described upper strata aeration branch pipe (7) and lower floor's aeration branch pipe (6) be all positioned at MBR membrane module bottom header (11) under.
5. MBR membrane module aerating system according to claim 1, is characterized in that, described upper strata aeration branch pipe (7) apart from MBR pond at the bottom of 430mm, described lower floor aeration branch pipe (6) apart from MBR pond at the bottom of 200mm.
6. MBR membrane module aerating system according to claim 1, is characterized in that, on described upper strata aeration supervisor (5), upper strata aeration tube pneumavalve (3) is housed, and on the aeration supervisor of described lower floor (4), lower floor's aeration tube pneumavalve (2) is housed.
7. MBR membrane module aerating system according to claim 1, it is characterized in that, between described upper strata aeration supervisor (5) and the aeration supervisor of lower floor (4), be also provided with at least middle aeration supervisor of one deck, in the middle of each, aeration supervisor is communicated with described MBR aeration house steward (1), and in the middle of every layer, aeration supervisor is communicated with many middle aeration branch pipes that are positioned in same level.
8. according to the MBR membrane module aerating system one of claim 1 ~ 7 Suo Shu, it is characterized in that, air flowmeter (13) is housed on described MBR aeration house steward (1).
9. the method to the MBR membrane module aerating system control one of claim 1 ~ 8 Suo Shu, MBR membrane module (10) filters and adopts the intermittently mode of water outlet, takes out and stops, than for 8min/2min, producing water 8min, stop producing water 2min, 10min is that a product water is taken out the cycle of stopping; It is characterized in that, described upper strata aeration supervisor (5) and the aeration supervisor of lower floor (4) cyclic aeration in turn, and it is consistent that upper strata aeration supervisor (5) and the aeration supervisor's of lower floor (4) aeration time change-over period and product water are taken out the cycle of stopping, upper strata aeration supervisor's (5) aeration time is 6:4 with the ratio of the aeration supervisor's of lower floor (4) aeration time, and during the 2min of MBR membrane module (10) while stopping producing water, described lower floor aeration is responsible for (4) aeration.
10. the method to the control of MBR membrane module aerating system according to claim 9, is characterized in that, described MBR membrane module (10) carries out automatic clear water backwash, backwash time 30s ~ 60s while stopping water outlet.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108784A (en) * | 2014-08-07 | 2014-10-22 | 赵曙光 | Simple variable aeration technology in MBR (membrane bioreactor) |
| CN104192982A (en) * | 2014-08-05 | 2014-12-10 | 诺卫环境安全工程技术(广州)有限公司 | MBR pulse aeration device free of extra power and aeration system with same |
| CN105293687A (en) * | 2015-11-27 | 2016-02-03 | 湖北君集水处理有限公司 | Aeration device for high-concentration suspended matter submerged membrane component |
| CN110015751A (en) * | 2019-03-07 | 2019-07-16 | 博天环境集团股份有限公司 | A kind of membrane module energy-saving and aerating method of MBR system |
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| CN203845858U (en) * | 2014-05-07 | 2014-09-24 | 中国电建集团中南勘测设计研究院有限公司 | MBR membrane module aerating system |
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| KR20100129517A (en) * | 2009-06-01 | 2010-12-09 | 주식회사 성환이엔티 | Gravity flow mbr for treatment of wastewater using metal membrane with macro pore size |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192982A (en) * | 2014-08-05 | 2014-12-10 | 诺卫环境安全工程技术(广州)有限公司 | MBR pulse aeration device free of extra power and aeration system with same |
| CN104192982B (en) * | 2014-08-05 | 2017-02-08 | 中信环境技术（广州）有限公司 | MBR pulse aeration device free of extra power and aeration system with same |
| CN104108784A (en) * | 2014-08-07 | 2014-10-22 | 赵曙光 | Simple variable aeration technology in MBR (membrane bioreactor) |
| CN104108784B (en) * | 2014-08-07 | 2016-06-08 | 赵曙光 | A kind of MBR variable aerating method |
| CN105293687A (en) * | 2015-11-27 | 2016-02-03 | 湖北君集水处理有限公司 | Aeration device for high-concentration suspended matter submerged membrane component |
| CN110015751A (en) * | 2019-03-07 | 2019-07-16 | 博天环境集团股份有限公司 | A kind of membrane module energy-saving and aerating method of MBR system |
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