CN1539759A - New type membrane bioreactor - Google Patents
New type membrane bioreactor Download PDFInfo
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- CN1539759A CN1539759A CNA2003101068910A CN200310106891A CN1539759A CN 1539759 A CN1539759 A CN 1539759A CN A2003101068910 A CNA2003101068910 A CN A2003101068910A CN 200310106891 A CN200310106891 A CN 200310106891A CN 1539759 A CN1539759 A CN 1539759A
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
A membrane bioreactor, especially the stream-pushing bioreactor with contact oxidization, is composed of central elastic filler to which the most of microbes are attached, lower aerator using blower to provide O2, performing microbe degradation, nitrate Nh3-N, and denitrify, the membrane module for separating mud from water, and back washing unit for periodically cleaning the membrane module. Its advantages are high effect and water quality and less pollution to membrane module.
Description
Technical field
The present invention relates to a kind of membrane bioreactor, particularly relate to a kind of bio-reactor of pulling flow type catalytic oxidation.
Background technology
Along with the quickening of population growth and industrialization paces, the municipal effluent amount sharply increases.When newly the source has dried up, begin to attempt utilizing reuse water.Membrane bioreactor (Membrane Bio-Reactor, MBR) be a kind of high-efficiency sewage treatment process that biological treatment is combined with membrane separation technique and forms, its effluent quality is better than conventional processes, can be used as precious water resource use (as greening, carwash, view and spill ground etc.).Membrane bioreactor mainly is made up of bio-reactor and membrane module two portions.Bio-reactor is the main place of contaminant degradation, and traditional bio-reactor is a fully mixing active sludge biological treatment reactor; Membrane module mainly is to play the effect of holding back to solid-liquid separation and to some macromolecular cpds, generally selects micro-filtration or ultra-filtration membrane for use.According to the difference of membrane module present position in membrane bioreactor, roughly MBR can be divided into separate film biological reactor and submerged membrane bio-reactor or integrated film bio-reactor.
That occur the earliest is separated type MBR, and the mud mixture in the bio-reactor enters membrane module under the supercharging of technology pump, and wherein, the water in the mixture sees through film becomes treat effluent, and all the other materials are back in the bio-reactor with concentrated solution.The shortcoming of this reactor maximum be since the content of microorganisms height to cause the too high and film of power consumption to pollute very serious.In order to alleviate power consumption, the submerged membrane bio-reactor has been proposed, membrane module is placed bio-reactor, negative pressure-pumping effect by the technology pump obtains the membrane filtration water outlet, energy consumption is low than separated type, but does not still have pollution problem of fine solution membrane module and because the problem that the limitation of active sludge biological reactor itself is brought.
The subject matter that traditional membrane bioreactor exists:
1. energy consumption height
Separate film biological reactor (accompanying drawing 1) is when disposing of sewage, and former water 1 at first enters active sludge biological reactor 2, utilizes oxygen that blower fan 4 provides and finishes organic degraded by aerating apparatus 7 at this.Sewage and a large amount of microorganisms enter membrane module 6 by pump 5 and finish mud-water separation subsequently, finish mud-water separation and macromole held back after water outlet 11 can be used as reclaimed water reuse, condensed water 12 enters activated sludge reactor 2, finishes the backflow of mud.Membrane module 6 is established backwash system 13 and is regularly cleaned.
Tiny solid particulate is deposited on the membrane module surface during separate film biological reactor operation, causes the obstruction of membrane module, and just film pollutes.For decelerating membrane pollution, utilize pump with mixed solution with higher flow velocity (3～6ms
-1) be pressed into membrane module, form cross-flow on the film surface and wash away, alleviate the pollution of membrane module.In order to reach so high flow velocity, the energy consumption of pump is huge.The typical energy consumption of separated type MBR is 6kwh/m
3～8kwh/m
3, just say that also cost on energy consumption is at 3.6 ~ 4.8 yuan/m
3(electricity charge by 0.6 yuan/kwh), too high energy consumption has increased the reused water processing cost, has restricted applying of this technology.
Integrated film bio-reactor (accompanying drawing 2) is when handling former water, and former water 1 at first enters active sludge biological reactor 2, and microorganism utilizes oxygen that blower fan 4 provides and finishes organic degraded by aerating apparatus 7.Utilize the membrane module 6 be immersed in fully in the activated sludge reactor 2 and finish mud-water separation by the negative pressure that pump 5 provides, finish mud-water separation and macromole is held back, the water outlet 11 after holding back can be used as reuse water and reclaims and use.Membrane module 6 is established backwash system 13 and is regularly cleaned.Though the energy consumption of integrated film bio-reactor is low than separate film biological reactor, but because membrane module is immersed in the activated sludge reactor, (the conventional activated sludge process content of microorganisms is greatly about 2000 ~ 3000mg/l a large amount of microorganisms in the reactor, the high energy of the active sludge of MBR reaches 10000mg/l), these microorganisms are easy to stick on the membrane module, cause the obstruction of membrane module, the reduction of permeability rate.In addition, the increase of extracellular polymeric EPS (ExtracelluarPolrmers) accumulation in mud mixed liquid can the causing viscosity of mixed liquid of the biomass cells that is directly proportional with microorganism concn and increase that concentration polarization causes resistance of membrane filtration.So for adhesive attraction and the concentration polarization that reduces microorganism, the aerating system of integrated film bio-reactor is than high many of traditional activated sludge process.The aeration rate of general traditional activated sludge process is 3 ~ 5 times of the water yield, and the aeration rate of integrated film bio-reactor is about 40 times of the water yield, and this certainly will increase energy consumption, improves the reused water processing cost.
2. can't bear than higher organic loading
The bio-reactor of existing membrane bioreactor all adopts activated sludge reactor, because the limitation of this technology itself causes existing membrane bioreactor can't bear higher organic loading.This be because, the raising of organic loading causes hyphomycetic a large amount of breeding, though do not have the sludge bulking problem because thread fungus EPS, causes that the concentration polarization phenomenon is huge than high many of rod bacterium and increases that cause the membrane module flux to descend, the aggravation film pollutes; In addition, the increase of organic loading causes a large amount of breedings of microorganism, can increase the weight of deposition and the concentration polarization phenomenon of microorganism on the membrane module surface equally, increases the weight of membrane pollution problem.
3. can't really realize the stabilization of excess sludge
Though membrane bioreactor can be realized the zero release of mud in theory, owing to following reason, have to rethink the stabilization of excess sludge: at first mud accumulates for a long time, causes the reduction of sludge activity; Secondly, the degraded of the aerobic aeration of mud needs to consume a large amount of power; At last, the accumulation of mud causes the rising of microorganism concn, can cause the increase of membrane module pollution level again.So the excess sludge of membrane bioreactor will regularly discharge, can not realize sludge stabilization, also to carry out sludge stabilization and handle.
4. can't the effectively preventing membrane pollution problem
No matter be conventional film bio-reactor split type or immersion, owing to adopt activated sludge process, thereby cause membrane module to have to contact with a large amount of microorganism, these microorganisms not only can be stopped up the aperture of membrane module, and can stick on the assembly, cause the severe contamination of assembly, so, the frequent cleaning of having to causes the raising of running cost.
Summary of the invention
In order to cut down the consumption of energy, to alleviate the pollution level of membrane module and the organic loading that improves bio-reactor, the present invention proposes following new membrane bio-reactor, and it comprises bio-reactor, flow guide system, intermediate pool, film system four parts; Bio-reactor is a pulling flow type catalytic oxidation bio-reactor, and its mud mixture enters flow guide system by water outlet, and the mud mixture of flow guide system climbs over barricade and enters intermediate pool, and the muddy water of intermediate pool enters the pump of film system by pipeline.The biological treatment of membrane bioreactor partly adopts contact oxidation method to replace traditional activated sludge process, and filler adopts elastic filler.Bio-reactor separates with membrane reactor, pressure-pipe type membrane module in adopting.Contact oxidation reactor adopts plug flow reactor, and the bio-reactor water outlet enters membrane module by flow guide system, and the recirculation water of membrane module is finished the backflow of mud to the bio-reactor front end.Because microorganism major part all fixed growth so just can reduce the pollution level of membrane module greatly on filler.Bio-reactor adopts the pulling flow type contact oxidation technology, not only can bear the high density load, obtains good effluent quality, but also has denitrification functions.Invention as shown in Figure 3.
Beneficial effect of the present invention:
1. alleviate the membrane module pollution level, energy consumption reduces
Membrane module separates with bio-reactor, and the microorganism major part is all attached on the filler, membrane module only directly contacts with a spot of microorganism, alleviated the deposition of microorganism at first greatly on the film surface, help to alleviate obstruction to membrane module, thereby cleaning interval that can membrane component and prolong and alleviate the power consumption that membrane module cleans: in addition, because the reduction of the microbial biomass of suspension growth, cause the minimizing of the extracellular polymeric EPS amount of biomass cells, can reduce twist like this, alleviate the concentration polarization problem, reduce the power consumption of pump and the pollution level that alleviates membrane module, thus the cleaning interval of membrane component and prolong.In addition, because content of microorganisms is low, mixed solution can pass through membrane module with lower flow velocity, and guarantees the effluent flux of membrane module to reach the purpose that cuts down the consumption of energy.Aeration rate is controlled at about 5 ~ 15 times of the water yield in addition: the current consumption that reduces blower fan.
2. can bear high organic loading
Because contact oxidation method itself can be born higher organic loading, so the biological processing unit of membrane bioreactor, contact oxidation method is wanted the organic loading height of specific activity mud method.The organic loading of active sludge membrane bioreactor is generally at 0.5kgCOD/d.m
3, the organic loading of contact oxidation method is generally at 1 ~ 2kgCOD/d.m
3So for the sewage of high density, the new membrane bio-reactor is more favourable, has so also reduced floor space.
3. has better nitrated and denitrification functions
The biological respinse part of contact oxidation method membrane bioreactor, not only holding back of membrane module guarantees that generation time, long nitrifier survived, and because microorganic adhesion on skeleton, can guarantee that also nitrifier can remain, thereby provide good condition for ammonia nitrogen nitrated; Because the effect of mass transmitting of oxygen, microflora has experienced aerobic zone, little oxygen district and oxygen-starved area from outside to inside successively in addition, thus the existence of this environment, for the denitrification (oxygen-starved area) of ammonia nitrogen provides condition.So the new membrane bio-reactor not only can be finished the nitrated of ammonia nitrogen, and can denitrification denitrogenation, its denitrogenation ability will be higher than traditional membrane bioreactor far away.
4. have the two advantage of microbial film and activated sludge process concurrently
The a small amount of mud that comes out in the bio-reactor is deposited in the membrane reactor, utilizes airlift pump to make it to turn back in the bio-reactor, has guaranteed enough sludge quantities in the bio-reactor.In addition, the microorganism of bio-reactor not only has attached to the microbial film on the skeleton, and the active sludge that is suspended in the water is also arranged, and has promptly overcome the swelling of mud, has guaranteed good mass transfer ability again.Just say that also this bio-reactor has the two advantage of biomembrance process and activated sludge process concurrently.
5. really realize sludge stabilizing
Because microorganic adhesion is on skeleton, because oxygen and organic mass transfer capabilities limits, owing to can not get oxygen and food,, microorganism itself is degraded to inanimate matter so just under the anaerobic environment, carry out oneself's decomposition in the microorganism of internal layer, finish stabilization.
6. reduce floor space and investment
Traditional membrane bioreactor all adopts lower flux in order to reduce the pollution level of membrane module, thereby causes the membrane module floor space big.The investment cost that efficient is low and high.And membrane bioreactor provided by the present invention can be good at overcoming membrane pollution problem, can improve the flux of membrane module greatly, thereby reaches the effect that reduces floor space and reduce investment.In brief, utilize contact oxidation method to replace activated sludge process, can bear higher organic loading, realize NH
3-N's is nitrated and denitrification integrated, guarantees better effluent quality; Adopt bio-reactor of the present invention not only can alleviate power consumption, alleviate the pollution level of membrane module, realize the sludge stabilization processing, and can reduce floor space and reduce investment.
Description of drawings
Fig. 1. traditional separate film biological reactor synoptic diagram
Fig. 2. traditional submerged membrane bio-reactor synoptic diagram
Fig. 3. novel membrane bioreactor synoptic diagram
1. former water 2. active sludge biological reactors 3. intermediate pool 4. gas blowers 5. pumps 6. membrane modules 7. aerating apparatuss 8. pulling flow type catalytic oxidation bio-reactors 9. elastic fillers 10. flow guide systems 11. treating water 12. condensed water 13. backwash devices 14. pipelines 15. barricades 16. water outlets among the figure
Embodiment
Fig. 3 is the novel membrane bioreactor synoptic diagram of the present invention one.
This novel membrane bioreactor, comprise pulling flow type catalytic oxidation bio-reactor 8, flow guide system 10, intermediate pool 3, film system four parts: the mud mixture of pulling flow type catalytic oxidation bio-reactor enters flow guide system 10 by water outlet 16, the mud mixture of flow guide system 10 climbs over barricade 16 and enters intermediate pool 3, and the muddy water of intermediate pool 3 enters the pump 5 of film system by pipeline 14.
Pulling flow type catalytic oxidation bio-reactor 8 middle parts are elastic fillers 9, the bottom be an aerating apparatus 7, and blower fan 4 is introduced air from the outside in the reactor and the aerating apparatus 7 by reactor bottom offers the needed oxygen of microorganism attached to intermediary filler 9 and a small amount of suspension in reactor.Utilize gas blower 4 to provide and finish the organism in the oxygen degradation of sewage behind the mass transfer and finish the nitrated and denitrification denitrogenation of ammonia nitrogen, at first enter intermediate pool 14 through the sewage after the biological treatment and a spot of microorganism and enter the film system by pump 5 then by aerating apparatus 7.Flow guide system 10 is made of water outlet 16 and barricade 15, and barricade is the one side of intermediate pool 3.
The film system comprises membrane module, pump and backwash device 13, it receives mud mixture by pipeline from middle pond, the mud mixture that enters the film system enters membrane module through after the pressurization of pump, in membrane module, finish the separation of muddy water, wherein condensed water 12 turns back to the front end of pulling flow type contact oxidation reactor by pipeline, the treating water discharging of membrane module is also reclaimed and is used, and backwash device periodic flushing membrane module guarantees that membrane module normally moves.
The processing technological flow of novel membrane bioreactor comprises the following steps:
1. former water 1 enters pulling flow type catalytic oxidation bio-reactor 8
2. the elastic filler 9 that former water process is adhered to a small amount of microorganism of a large amount of microorganisms and suspension
3. the microorganism oxygen that utilizes blower fan 4 to introduce the air of reactor and the aerating apparatus 7 by reactor bottom from the outside to provide is removed organism and the ammonia nitrogen the former water
4. the mud mixture of pulling flow type catalytic oxidation bio-reactor enters intermediate pool by the water outlet 16 and the barricade 15 of flow guide system, precipitation part microorganism in flow guide system
5. the water that contains a small amount of microorganism in the intermediate pool 3 enters membrane module 6 by the pressurization of pump 5 and by pipeline 14
6. the muddy water that contains a small amount of microorganism is finished mud-water separation in membrane module 6
7. the condensed water 12 that contains mud turns back to the front end of pulling flow type catalytic oxidation bio-reactor by pipeline, and treating water 11 is discharged from membrane module 6
8. membrane module guarantees that by backwash device 13 routine cleaning membrane module normally moves
Claims (9)
1. novel membrane bioreactor, it comprises bio-reactor, it is characterized in that: it also comprises flow guide system (10), intermediate pool (3), film system three parts: bio-reactor is a pulling flow type catalytic oxidation bio-reactor (8), its mud mixture enters flow guide system by water outlet (16), the mud mixture of flow guide system climbs over barricade (15) and enters intermediate pool (3), and the muddy water of intermediate pool enters the pump (5) of film system by pipeline (14).
2. novel membrane bioreactor according to claim 1, it is characterized in that: pulling flow type catalytic oxidation bio-reactor middle part is elastic filler (9), the bottom be aerating apparatus (7), and blower fan (4) is introduced air from the outside in the reactor and the aerating apparatus by reactor bottom offers the needed oxygen of microorganism attached to intermediary filler and a small amount of suspension in reactor.
3. novel membrane bioreactor according to claim 1 is characterized in that: flow guide system is made of water outlet (16) and barricade (15), and barricade is the one side of intermediate pool.
4. novel membrane bioreactor according to claim 1 is characterized in that: intermediate pool is to be between catalytic oxidation bio-reactor and the film system, the muddy water that acceptance and storage are come out from flow guide system.
5. novel membrane bioreactor according to claim 1, it is characterized in that: the film system comprises membrane module, pump and backwash device (13), it receives mud mixture by pipeline from middle pond, the mud mixture that enters the film system enters membrane module (6) through after the pressurization of pump, in membrane module, finish the separation of muddy water, wherein condensed water (12) is returned the front end of contact oxidation reactor by pipeline, the treating water of membrane module (11) discharging and recovery are used, backwash device periodic flushing membrane module guarantees that membrane module normally moves.
6. novel membrane bioreactor according to claim 2 is characterized in that: filler adopts half elastic filler.
7. novel membrane bioreactor according to claim 2 is characterized in that: aerating apparatus adopts the internal-circulation type aeration method.
8. novel film biology according to claim 5 is only answered device, it is characterized in that: membrane module adopts the external-compression type membrane module.
9. the processing technological flow of novel membrane bioreactor according to claim 1, it is characterized in that: it comprises the following steps:
1. former water (1) enters pulling flow type catalytic oxidation bio-reactor
2. the elastic filler that former water process is adhered to a small amount of microorganism of a large amount of microorganisms and suspension
3. the microorganism oxygen that utilizes blower fan to introduce the air of reactor and the aerating apparatus by reactor bottom from the outside to provide is removed organism and the ammonia nitrogen the former water
4. the mud mixture of pulling flow type catalytic oxidation bio-reactor enters intermediate pool by the water outlet and the barricade of flow guide system, precipitation part microorganism in flow guide system
5. the water that contains a small amount of microorganism in the intermediate pool enters membrane module by the pressurization of pump and by pipeline
6. the water that contains a small amount of microorganism is finished mud-water separation in membrane module
7. the condensed water (12) that contains mud turns back to the front end of pulling flow type catalytic oxidation bio-reactor by pipeline, and treating water is discharged from membrane module
8. membrane module guarantees that by backwash device routine cleaning membrane module normally moves.
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|---|---|---|---|
| CNA2003101068910A CN1539759A (en) | 2003-10-31 | 2003-10-31 | New type membrane bioreactor |
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| CNA2003101068910A CN1539759A (en) | 2003-10-31 | 2003-10-31 | New type membrane bioreactor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100545110C (en) * | 2007-12-13 | 2009-09-30 | 同济大学 | Dispose of sewage or the micro-polluted raw packaging stage-type film bioreactor device |
| CN102276055A (en) * | 2011-05-17 | 2011-12-14 | 太平洋水处理工程有限公司 | Novel method for controlling membrane pollution in membrane-bioreactor |
| CN101734794B (en) * | 2008-11-19 | 2012-01-11 | 北京渭黄天安环保科技有限公司 | Lateral flow type membrane bioreactor device and sewage treatment method using same |
| CN103663673A (en) * | 2013-12-20 | 2014-03-26 | 青岛百瑞吉生物工程有限公司 | Hybrid membrane bioreactor |
| CN106064867A (en) * | 2016-07-28 | 2016-11-02 | 江西夏氏春秋环境投资有限公司 | A kind of compound aerobic membrane bioreactor and technique |
| CN108101218A (en) * | 2018-02-02 | 2018-06-01 | 天津壹新环保工程有限公司 | Method and device for removing total nitrogen in sewage |
| CN114853157A (en) * | 2022-04-21 | 2022-08-05 | 西安理工大学 | Efficient biological membrane reaction sewage treatment system and use method thereof |
-
2003
- 2003-10-31 CN CNA2003101068910A patent/CN1539759A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100545110C (en) * | 2007-12-13 | 2009-09-30 | 同济大学 | Dispose of sewage or the micro-polluted raw packaging stage-type film bioreactor device |
| CN101734794B (en) * | 2008-11-19 | 2012-01-11 | 北京渭黄天安环保科技有限公司 | Lateral flow type membrane bioreactor device and sewage treatment method using same |
| CN102276055A (en) * | 2011-05-17 | 2011-12-14 | 太平洋水处理工程有限公司 | Novel method for controlling membrane pollution in membrane-bioreactor |
| CN103663673A (en) * | 2013-12-20 | 2014-03-26 | 青岛百瑞吉生物工程有限公司 | Hybrid membrane bioreactor |
| CN106064867A (en) * | 2016-07-28 | 2016-11-02 | 江西夏氏春秋环境投资有限公司 | A kind of compound aerobic membrane bioreactor and technique |
| CN108101218A (en) * | 2018-02-02 | 2018-06-01 | 天津壹新环保工程有限公司 | Method and device for removing total nitrogen in sewage |
| CN114853157A (en) * | 2022-04-21 | 2022-08-05 | 西安理工大学 | Efficient biological membrane reaction sewage treatment system and use method thereof |
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