CN102838205A - External continuous flow aerobic granular sludge membrane bioreactor - Google Patents

External continuous flow aerobic granular sludge membrane bioreactor Download PDF

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Publication number
CN102838205A
CN102838205A CN2012103197027A CN201210319702A CN102838205A CN 102838205 A CN102838205 A CN 102838205A CN 2012103197027 A CN2012103197027 A CN 2012103197027A CN 201210319702 A CN201210319702 A CN 201210319702A CN 102838205 A CN102838205 A CN 102838205A
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membrane
solid
reaction tank
membrane module
continuous flow
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CN102838205B (en
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陈静
彭培源
王悦超
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Shanghai LG Electronics Co Ltd
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Shanghai LG Electronics Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention relates to an external continuous flow aerobic granular sludge membrane bioreactor. The bioreactor comprises a continuous flow biological reaction tank, a membrane module and aeration equipment, wherein the continuous flow biological reaction tank is connected with a water inlet tank; aerobic granular sludge can be formed and reserved inside the continuous flow biological reaction tank; the membrane module is arranged outside the continuous flow biological reaction tank; a water inlet of the membrane module is connected with a water outlet at the upper part of the continuous flow biological reaction tank; the aeration equipment is used for providing necessary oxygen for the biodegradation reaction; and sewage to be treated enters the continuous flow biological reaction tank in a continuous flow mode, pollutants in the sewage are contacted with the aerobic granular sludge in the reaction tank, the aerobic granular sludge treatment is carried out under the condition of supplying oxygen by the aeration equipment, then the sewage enters the membrane module, a solid-liquid mixture is separated by the membrane module and filtrate is continuously drained. The external continuous flow aerobic granular sludge membrane bioreactor not only can be kept having the original advantage of excellent effluent quality of the membrane bioreactor, but also can play the advantage characteristic that the granular sludge synchronously removes organisms, denitrifies and removes phosphorous.

Description

The external placed type continuous-flow aerobic granular sludge membrane bioreactor
Technical field
The present invention relates to a kind of sewage disposal technology, refer in particular to a kind of external placed type continuous-flow aerobic granular sludge membrane bioreactor.
Background technology
Along with the increase of quickening of urbanization process, urban population, the quantity discharged of trade effluent and sewage is increasing.In recent years, because the aggravation of water environment pollution and body eutrophication problem, the water pollution control The Application of Technology more and more widely.Biological degradation method is to remove the most economical effective means of organism in the waste water.According in the bio-metabolic process to the demand status of oxygen; Mikrobe can be divided into aerobic microbiological, anoxic mikrobe, anaerobion and intervenient aerobic-anaerobic microbe; Wherein aerobic microbiological dominate always in WWT is used for handling the sewage below the intermediate concentration more.
There are many deficiencies in traditional activated sludge sewage processing system, as is easy to generate a large amount of excess sludges, and impact load is responsive, reactor volume is huge and volumetric loading is lower; Very easily cause the thread fungus raised growth, cause sludge bulking, processing efficiency descends, even causes the treatment process paralysis.In recent years; Occurred many with biological autoflocculation principle be applied in the aerobic reaction system, to realize the granular research of aerobic sludge: owing in reactor drum, retained the good aerobic grain shape active sludge of a large amount of settling properties; Can reduce requirement to the sludge settling system; Reduce the discharging of excess sludge, significantly reduce the overall operation energy consumption simultaneously.This aerobic particle mud techniques make use the autoflocculation of mikrobe form the closely knit thalline of structure, have mud-water separation better performances, tolerance organic loading advantages of higher.Owing to integrate different properties mikrobe (aerobic, anoxic and anaerobion), in reactor drum, can reach higher sludge concentration, thereby improve the volumetric loading and the capacity of resisting impact load of reactor drum; Because of it has good settling property, can reduce reactor volume and floor space, have very important meaning at economic aspect.Simultaneously, aerobic particle mud also can be used for the processing of hard-degraded substance in the trade effluent (heavy metal and complicated organism), especially aspect treatment of high concentration organic waste water and denitrogenation dephosphorizing.
Membrane bioreactor (MBR) is the emerging sewage disposal technology that membrane separation technique is combined with biochemical processing; It can in the space of compactness, realize simultaneously mikrobe to the degraded of pollution substance and film to the separating of pollution substance, have efficient, practical, technology is compact, save advantages such as occupation of land.As shown in Figure 1, membrane bioreactor mainly comprises with the lower section:
1) anaerobic/anoxic, Aerobic Pond
2) membrane cisterna and membrane module
3) water inlet, water outlet and mud return-flow system
Particularly; Water inlet 1 ' gets into Buffer Pool 3 ' through meticulous grid 2 '; Send into anaerobic pond/anoxic pond 5 ' then, through whisking appliance 4 ' wherein, the sewage after realization efficiently removes to the nitrogen phosphorus in the sewage by anaerobic pond/anoxic pond 5 ' gets into Aerobic Pond 6 '; Be provided with transmitter 8 ' and aeration divider 9 ' in the Aerobic Pond 6 '; Sewage through after the Aerobic Pond 6 ' processing gets into membrane cisterna 7 ', utilizes suction pump 12 ' to extract filtrate out after handling through membrane module 10 ' wherein, and wherein the Drainage pipe of membrane module 10 ' is provided with pressure transmitter 11 '; Aerator 14 ' is delivered to membrane module 10 ' below through gas meter 13 ' with gas, and membrane cisterna 7 ' bottom is deposited the pond through recycle pump 15 with anaerobic pond/anoxic pond 5 ' and mud and communicated.
Membrane bioreactor (MBR) with said structure has following defective:
1) membrane pollution problem and with respect to the high energy consumption of traditional waste water treatment process remains the main bottleneck that limits this technology widespread use and popularization.Membrane contaminant matter and pollution course directly and in the reactor drum sludge character and microorganism growth characteristic closely related.Along with to the going deep into of MBR understanding and research, how to adjust and improve microbial morphology and sludge character among the MBR, thereby reach the purpose of decelerating membrane pollution, become one of emphasis problem of membrane bioreactor research.
2) in addition; As to realize efficiently removing to the nitrogen phosphorus in the sewage; On the basis of Aerobic Pond and membrane cisterna, also need increase the recirculation system between anaerobic reation pool, hypoxia response pond and each reaction tank, the fixedly input cost and the floor space of the remarkable increase of this meeting system.
Application number is that 200710058108.7 patent discloses a kind of integrative aerobic particle sludge membrane bioreactor; Application number is that 200720023157.1 patent discloses integrated aerobic granular sludge membrane bioreactor, and this type membrane bioreactor mainly comprises:
1) aerobic particle mud reaction tank
2) membrane module
3) water inlet, outlet system
This type of integrative aerobic particle sludge membrane bioreactor has following defective:
1) is difficult in the reactor drum effectively form and keep aerobic particle mud, needs external source to cultivate the back and regularly add;
2) because membrane module is immersed in the aerobic granular sludge reactor, and the aeration film scouring of membrane module can cause a large amount of fragmentations of aerobic particle mud in the operational process, so performance stability can't guarantee that need frequent starting or external source are inoculated a large amount of granule sludges.
3) formation of aerobic particle mud and removal pollutent need effective solid-liquid to flow; And membrane module is if be immersed in the aerobic granular sludge reactor; When granule sludge concentration is higher; Membrane module can stop the motion of granule sludge, makes granule sludge fully to contact with pollutent, reduces contaminant removal efficiency; Even granule sludge can harden between flat sheet membrane or the two ends of hollow fiber film assembly, significantly reduces the effective film filtration area, increases cleaning frequency membrane, shortens film work-ing life.
4) at present integrative aerobic particle sludge membrane bioreactor adopts sequence batch (Inlet and outlet water mode more, complicacy that like this can the control of increase system, and significant limitation the Application Areas of this reactor drum.
Summary of the invention
The technical problem that the present invention will solve is: propose a kind of external placed type continuous-flow aerobic granular sludge membrane bioreactor, to improve or to overcome or the multinomial defective that prior art exists.
Technical solution of the present invention is: a kind of external placed type continuous-flow aerobic granular sludge membrane bioreactor; This reactor drum comprises continuous flow biological reaction tank, membrane module and aerator; Wherein, This continuous flow biological reaction tank links to each other with suction sump, can form and keep aerobic particle mud in it, and said membrane module is arranged on the outside of said continuous flow biological reaction tank; The water-in of this membrane module links to each other with the water outlet on said continuous flow biological reaction tank top, and said aerator is that bio-degradation reactions provides essential oxygen; Treatment sewage adopts the even flow mode to get into this continuous flow biological reaction tank; Pollutants in sewage matter contacts with aerobic particle mud in the reaction tank; Supplied with under the condition of oxygen by aerator, carrying out aerobic particle mud and handle, sewage gets into membrane module afterwards; By membrane module solidliquid mixture is separated, and discharge filtered solution continuously.
Since membrane contaminant matter and pollution course directly and in the reactor drum sludge character and microorganism growth characteristic closely related; Therefore; Along with going deep into to MBR understanding and research; How to adjust and improve microbial morphology and sludge character among the MBR, thereby reach the purpose of decelerating membrane pollution, become one of emphasis problem of membrane bioreactor research.Mud should have higher activity, suitable high sludge concentration in the membrane bioreactor, can ensure the high quality water outlet, has certain space scale (not in small, broken bits) and intensity again, keeps good stalling characteristic and the pollution that reduces film.Therefore, the prilling mud with certain size of mikrobe self formation more can satisfy the feature request of membrane bioreactor than general floc sludge.Therefore, the present invention organically combines aerobic particle mud technology and membrane separation technique, both can keep the good advantage of the original effluent quality of membrane bioreactor, can bring into play the advantageous characteristic that granule sludge is removed organism and denitrogenation dephosphorizing synchronously again.Simultaneously, particle diameter that granule sludge is bigger and fine and close structure also can improve the strainability of mixed solution greatly, increase membrane flux, decelerating membrane pollution process, the work-ing life of prolongation film.
Show that through test external placed type continuous-flow aerobic granular sludge-membrane bioreactor of the present invention has following advantage in application:
1) fixedly input cost and energy consumption level will significantly reduce more than 30% compared to other membrane bioreactors;
2) film will extend to 7-10 by 3-5 work-ing life;
3) floor space is expected to reduce with respect to traditional activated sludge process and reaches more than 75%.
4) system's control is simple, stable continuously, can be widely used in municipal administration, industry, high density, difficult degradation, the WWT that contains poisonous pollutent and reuse field.
Description of drawings
Fig. 1 is the structural representation of existing membrane bioreactor.
Fig. 2 is the structural representation of a specific embodiment of external placed type continuous-flow aerobic granular sludge membrane bioreactor of the present invention.
Fig. 3 is the structural representation of another specific embodiment of external placed type continuous-flow aerobic granular sludge membrane bioreactor of the present invention.
The main label declaration of accompanying drawing:
Prior art (Fig. 1):
1 ', water inlet 2 ', meticulous grid 3 ', Buffer Pool
4 ', anaerobic pond/anoxic pond 5 ', whisking appliance 6 ', Aerobic Pond 6
7 ', membrane cisterna 8 ', transmitter 9 ', aeration divider
10 ', membrane module 11 ', pressure transmitter 12 ', suction pump
13 ', gas meter 14 ', aerator (gas blower) 15 ', recycle pump
The present invention (Fig. 2, Fig. 3):
1, suction sump 2, intake pump 3, continuous flow biological reaction tank
4, solid-liquid separator 5, diversion trench/tube 6, high dissolved oxygen district
7, aerobic particle mud 8, low dissolved oxygen district 9, membrane module
10, suction pump 11,11a, 11b, aerator (gas blower) 12, recycling trays
13, pressure pump
Embodiment
The present invention is a kind of external placed type continuous-flow aerobic granular sludge membrane bioreactor; This reactor drum comprises continuous flow biological reaction tank, membrane module and aerator; Wherein, This continuous flow biological reaction tank links to each other with suction sump, can form and keep aerobic particle mud in it, and said membrane module is arranged on the outside of said continuous flow biological reaction tank; The water-in of this membrane module links to each other with the water outlet on said continuous flow biological reaction tank top, and said aerator is that bio-degradation reactions provides essential oxygen; Treatment sewage adopts the even flow mode to get into this continuous flow biological reaction tank; Pollutants in sewage matter contacts with aerobic particle mud in the reaction tank; Supplied with under the condition of oxygen by aerator, carrying out the biochemical reaction of synchronous removal organism, toxicant and the denitrogenation dephosphorizing of granule sludge, the sewage after aerobic particle mud is handled gets into membrane module; By membrane module solidliquid mixture is separated, discharge filtered solution continuously.
Because membrane module of the present invention is independent of continuous flow biological reaction tank; Formation and stable reservation to aerobic particle mud in the reaction tank can not cause any negative impact; Granule sludge can form in reaction tank voluntarily fast, and stable existence, and needing no foreign is cultivated the back and added; On the other hand, the mud of the settling property difference that produces in the continuous flow biological reaction tank can be continuously flows in the external membrane assembly from the water outlet of solid-liquid displacement zone top, regularly spoil disposal from membrane cisterna or pressure type membrane module.
In addition, what the present invention adopted is the even flow water inlet, and by the membrane module continuous effluent, system controls simple applied range, and the film stable effluent quality reaches or is superior to country's discharging or reuse standard, therefore can directly discharge or get into the water reclaiming system.The mud of the settling property difference that in continuous flow biological reaction tank of the present invention, produces; Can be continuously from the water outlet inflow external membrane assembly of solid-liquid displacement zone top; Only need regularly that spoil disposal gets final product from membrane cisterna or pressure type membrane module; Therefore sustainablely pump high-quality water outlet, and the mud overwhelming majority who stays in the continuous flow biological reaction tank is the extraordinary granule sludge of settling property from membrane module.
Preferably, comprise the reaction zone of bottom and the solid-liquid displacement zone on top in the said continuous flow biological reaction tank, said solid-liquid displacement zone is to be expanded and formed by the reaction zone upper volume, is provided with solid-liquid separator in it; At said reaction zone high speed mobile solidliquid mixture, get into this disengaging zone after flow velocity reduce rapidly, sidewall returns reaction zone along the disengaging zone thereby make the good particle of most of settling property.
Further; Said solid-liquid separator is located in the solid-liquid displacement zone on reaction zone top; Can form by single or a plurality of structures with ramp and lower inclined plane; It is preferable to have ramp and lower inclined plane and forms the V-arrangement cross section, and most granule sludges are blocked in reaction zone by the lower inclined plane of solid-liquid separator, and the granule sludge that gets into the solid-liquid displacement zone upper strata on a small quantity then can return reaction zone along the solid-liquid separator ramp; Sewage after the processing flows out entering external placed type membrane cisterna or membrane module via the water outlet on solid-liquid separator top.
Following conjunction with figs. and specific embodiment specific embodiments of the invention are done further to specify.
Fig. 2 is the structural representation of a specific embodiment of the present invention; As shown in the figure; The external placed type continuous-flow aerobic granular sludge membrane bioreactor of present embodiment comprises continuous flow biological reaction tank 3, membrane module 9 and aerator 11a, 11b, can form and keep aerobic particle mud in the continuous flow biological reaction tank 3, and the inlet of its bottom links to each other with suction sump 1 through intake pump 2; And aerator (like gas blower) 11a passes through pipe connection to reaction tank, for bio-degradation reactions provides essential oxygen.
In the present embodiment; The form that this continuous flow biological reaction tank 3 is big up and small down particularly, comprises the reaction zone of bottom and the solid-liquid displacement zone on top in this reaction tank; Wherein, Solid-liquid displacement zone is to be expanded and formed by the reaction zone upper volume, is provided with solid-liquid separator 4 in it, and solid-liquid separator 4 is located in this solid-liquid displacement zone.Utilize aforementioned structure, make that flow velocity reduces rapidly after reaction zone high speed mobile solidliquid mixture gets into this solid-liquid displacement zone, thereby make the good particle of most of settling property return reaction zone along the sidewall of solid-liquid displacement zone.
Among the present invention, the aspect ratio of reaction zone (H/D) is preferably between 2: 1~10: 1; And preferably in that 1/6~1/3 place's volume expands the formation solid-liquid displacement zone apart from the reaction tank top, solid-liquid displacement zone with reaction zone diameter than preferable at 1: 1~3: 1; Utilize aforementioned result, make that flow velocity reduces rapidly after reaction zone high speed mobile solidliquid mixture gets into this disengaging zone, sidewall returns reaction zone along the disengaging zone thereby make the good particle of most of settling property.
Alternatively; Be provided with flow-guiding structure (for example diversion trench and/or guide shell 5) in the reaction zone,, please combine shown in Figure 2 with being divided into high dissolved oxygen district and low dissolved oxygen district in the reaction zone; Guide shell 5 capable of using forms high dissolved oxygen district 6 and low dissolved oxygen district 8 among the present invention, thus the efficient of strengthening system denitrogenation dephosphorizing.
Further, solid-liquid separator 4 is preferable to have ramp and lower inclined plane and forms the V-arrangement cross section, and the stub end in V-arrangement cross section is fixed in the inwall of the solid-liquid displacement zone of reaction tank, and tip then orientating reaction pond hub is provided with; In the sludge handling process, most granule sludges will be blocked in reaction zone by the lower inclined plane of solid-liquid separator, and the granule sludge that gets into the solid-liquid displacement zone upper strata on a small quantity then can return reaction zone along the solid-liquid separator ramp; Sewage after the processing flows out and entering external placed type membrane cisterna or membrane module via the water outlet on solid-liquid separator 4 tops.In addition, solid-liquid separator 4 can be selected to establish and be single or multiple lift, and its position can be at any position, the bottom below the solid-liquid displacement zone liquid level to top.
Membrane module 9 is arranged on the outside of continuous flow biological reaction tank 3, and the sewage after the aerobic particle mud in continuous flow biological reaction tank 3 is handled enters membrane module 9, is separated by 9 pairs of solidliquid mixtures of membrane module.Adopt the submerged membrane assembly in the present embodiment, its membrane cisterna is arranged on the outside of reaction tank lower reaction zone, takes up an area of the space in order to reducing; The water outlet on said continuous flow biological reaction tank top links to each other with the water-in at these membrane module 9 tops, and the filtered solution of membrane module 9 is discharged through a suction pump 10; Aerator (like gas blower) 11b arrives the gas distributor of membrane module 9 belows through pipe connection, thereby for membrane module 9 effective scrubbing action is provided.
Fig. 3 is the structural representation of another specific embodiment of the present invention; The main difference of present embodiment and last embodiment is pointed out to be; The membrane module 9 of present embodiment adopts the pressure type membrane module, and this pressure type membrane module links to each other with the top water outlet of continuous flow biological reaction tank 3 through a pressure pump 13.The water outlet of reaction tank 3 can be adopted cross flow filter or the water outlet of dead-end filtration method by in the pressure pump 13 PIP formula membrane modules 9, and the trapped particles thing returns reaction tank 3.Compared to the submerged membrane assembly, the pressure type membrane module has characteristics such as floor space is little, water flux height, but the influent turbidity of entering pressure type membrane module should be lower than the influent turbidity of submerged membrane assembly.Therefore, the submerged membrane assembly more is applicable to the sewage (like multiple industrial sewage) of handling high pollution, high solid content, and the pressure type membrane module more is applicable to the sewage (like municipal wastewater) of the low solid content of processing etc.
Below in conjunction with said structure the concrete treating processes of previous embodiment is described in detail:
At first; Treatment sewage adopts the even flow mode to get into this continuous flow biological reaction tank 3; Pollutants in sewage matter such as organism, nitrogen, phosphorus, toxicant (like heavy metal, microbiotic etc.) etc.; Contact with the aerobic particle mud 7 in the reaction tank, supplying with under the condition of oxygen, carry out the biochemical reaction of synchronous removal organism, toxicant and the denitrogenation dephosphorizing of granule sludge by aerator.The aerobic particle mud techniques make use autoflocculation of mikrobe form closely knit circle or the oval thalline of structure, have mud-water separation better performances, tolerance organic loading advantages of higher.Owing to integrate different properties mikrobe (aerobic, anoxic and anaerobion), in reactor drum, can reach higher sludge concentration, thereby improve the volumetric loading and the capacity of resisting impact load of reactor drum; Because of it has good settling property, can reduce reactor volume and floor space, have very important meaning at economic aspect.
Sewage, further contacts with the external membrane assembly after the aerobic particle mud degraded at its pollutent.Membrane module position and continuous-flow aerobic granular sludge biological reaction tank are separated; Separatory membrane can be microfiltration membrane or ultra-filtration membrane; Its film type can be hollow-fibre membrane or flat sheet membrane; Its mould material is organic membrane or mineral membrane, and kit form can be submerged membrane assembly (like Fig. 2) or pressure type membrane module (like Fig. 3).Separatory membrane is retained in most suspended particulate matters in the reactor drum, and filtered solution is pumped from system by suction pump.
On the other hand, be trapped in membrane module 9 outer granule sludge or other PM for particulate matters and will return continuous flow biological reaction tank 3, or discharge as excess sludge.
External placed type continuous-flow aerobic granular sludge membrane bioreactor among the present invention has following advantage compared to existing aerobic granular sludge membrane bioreactor:
A) membrane module itself and film aerating system are independent of the continuous-flow aerobic granular sludge reaction tank; Aerobic particle mud in the reaction tank is formed and stablizes reservation and can not cause any negative impact; Granule sludge can form in reaction tank voluntarily fast, and stable existence, and needing no foreign is cultivated the back and added;
B) membrane module separates with most aerobic particle muds in the reactor drum; Even if granule sludge dense (20-40g/L) can not influence the motion of granule sludge yet; Therefore granule sludge can fully contact with pollutent, significantly increases the load efficient of system, improves the shock resistance of system;
C) be retained in the continuous-flow aerobic granular sludge reaction tank owing to most granule sludges; Have only a spot of mud and suspended particulate can flow into the film system of external placed type, therefore remarkable decelerating membrane pollution speed, raising membrane flux; Reduce cleaning frequency membrane, prolong film work-ing life.
What d) the present invention adopted is the even flow water inlet, and the membrane module continuous effluent, and system controls simple applied range, and the film stable effluent quality reaches or is superior to country's discharging or reuse standard, therefore can directly discharge or get into the water reclaiming system.
Aerobic particle mud cultivate and operational process in, can produce the granular debris or the mud flco of part settling property difference, the mud of this part settling property difference needs regular discharge system, thereby the absolute predominance of granule sludge and premium properties in the assurance system.
Owing to employing in the existing aerobic granular sludge membrane bioreactor is built-in membrane module; If adopt the membrane module water outlet; Then can whole mud be dammed in system; Thereby the mud of settling property difference can not reach the purpose of discharge system through the membrane module water outlet, the therefore necessary posticum water outlet of different heights from the reactor drum side regularly of built-in aerobic granular sludge membrane bioreactor, the mud of discharge settling property difference.Though this just causes water inlet can be successive, membrane module water outlet and reactor drum water outlet all are step, and the water of being discharged by the reactor drum posticum, because the inside still contains more mud and can not reach emission standard, and need further to handle.
The mud of the settling property difference that in continuous flow biological reaction tank of the present invention, produces; Can flow in the external membrane assembly from the water outlet above the solid-liquid displacement zone by successive; Only need regularly that spoil disposal gets final product from membrane cisterna or pressure type membrane module; Therefore sustainablely pump high-quality water outlet, and the mud overwhelming majority who stays in the continuous flow biological reaction tank is the extraordinary granule sludge of settling property from membrane module.The prilling mud with certain size that the present invention utilizes mikrobe self to form can make mud in the membrane bioreactor both have higher activity, suitable high sludge concentration; Can ensure the high quality water outlet; Have certain space scale (not in small, broken bits) and intensity again, keep good stalling characteristic and the pollution that reduces film.The present invention organically combines aerobic particle mud technology and membrane separation technique, both can keep the good advantage of the original effluent quality of membrane bioreactor, can bring into play the advantageous characteristic that granule sludge is removed organism and denitrogenation dephosphorizing synchronously again.Simultaneously, particle diameter that granule sludge is bigger and fine and close structure also can improve the strainability of mixed solution greatly, increase membrane flux, decelerating membrane pollution process, the work-ing life of prolongation film.
Though the present invention discloses with specific embodiment; But it is not in order to limiting the present invention, and for example included continuous flow biological reaction tank type, membrane module type or position, support equipment kind or quantity among the present invention is not limited only to Fig. 2, shown in Figure 3; Any those skilled in the art; The displacement of the equivalent assemblies of under the prerequisite that does not break away from design of the present invention and scope, having done, or, all should still belong to the category that this patent is contained according to equivalent variations and modification that scope of patent protection of the present invention is done.

Claims (10)

1. external placed type continuous-flow aerobic granular sludge membrane bioreactor; It is characterized in that; This reactor drum comprises continuous flow biological reaction tank, membrane module and aerator, and wherein, this continuous flow biological reaction tank links to each other with suction sump; Can form and keep aerobic particle mud in it; Said membrane module is arranged on the outside of said continuous flow biological reaction tank, and the water-in of this membrane module links to each other with the water outlet on said continuous flow biological reaction tank top, and said aerator is that bio-degradation reactions provides essential oxygen; Treatment sewage adopts the even flow mode to get into this continuous flow biological reaction tank; Pollutants in sewage matter contacts with aerobic particle mud in the reaction tank; Supplied with under the condition of oxygen by aerator, carrying out aerobic particle mud and handle, sewage gets into membrane module afterwards; By membrane module solidliquid mixture is separated, and discharge filtered solution continuously.
2. external placed type continuous-flow aerobic granular sludge membrane bioreactor as claimed in claim 1; It is characterized in that; Comprise the reaction zone of bottom and the solid-liquid displacement zone on top in the said continuous flow biological reaction tank; Said solid-liquid displacement zone is to be expanded and formed by the reaction zone upper volume, is provided with solid-liquid separator in it; At said reaction zone high speed mobile solidliquid mixture, get into this disengaging zone after flow velocity reduce rapidly, sidewall returns reaction zone along the disengaging zone thereby make the good particle of most of settling property.
3. external placed type continuous-flow aerobic granular sludge membrane bioreactor as claimed in claim 2 is characterized in that, is provided with flow-guiding structure in the said reaction zone, said reaction zone is divided into high dissolved oxygen district and low dissolved oxygen district, the efficient of strengthening system denitrogenation dephosphorizing.
4. external placed type continuous-flow aerobic granular sludge membrane bioreactor as claimed in claim 2; It is characterized in that; Said solid-liquid separator is located in the solid-liquid displacement zone on reaction zone top; Comprise single or a plurality of structures with ramp and lower inclined plane, most granule sludges are blocked in reaction zone by the lower inclined plane of solid-liquid separator, and the granule sludge that gets into the solid-liquid displacement zone upper strata on a small quantity then can return reaction zone along the solid-liquid separator ramp; Sewage after the processing flows out entering external membrane assembly via the water outlet on solid-liquid separator top.
5. external placed type continuous-flow aerobic granular sludge membrane bioreactor as claimed in claim 4 is characterized in that, said solid-liquid displacement zone is provided with the said solid-liquid separator of single or multiple lift, and solid-liquid separator is located at the position below the solid-liquid displacement zone liquid level.
6. external placed type continuous-flow aerobic granular sludge membrane bioreactor as claimed in claim 2; It is characterized in that; The aspect ratio of reaction zone (H/D) is 2: 1~10: 1; And be in that 1/6~1/3 place's volume expands and forms said solid-liquid displacement zone apart from the reaction tank top, solid-liquid displacement zone is 1: 1~3: 1 with the reaction zone diameter ratio, at reaction zone high speed mobile solidliquid mixture; Flow velocity reduces rapidly after getting into this solid-liquid displacement zone, thereby makes the good particle of most of settling property return reaction zone along the solid-liquid displacement zone sidewall.
7. external placed type continuous-flow aerobic granular sludge membrane bioreactor as claimed in claim 1; It is characterized in that; Said membrane module adopts submerged membrane assembly or pressure type membrane module; Its separatory membrane adopts microfiltration membrane or ultra-filtration membrane, and its film type is hollow-fibre membrane or flat sheet membrane, and its mould material is organic membrane or mineral membrane.
8. external placed type continuous-flow aerobic granular sludge membrane bioreactor as claimed in claim 1 is characterized in that said membrane module is retained in most suspended particulate matters in the reaction tank, and filtered solution is pumped from membrane module by suction pump.
9. like each described external placed type continuous-flow aerobic granular sludge membrane bioreactor of claim 1 to 8; It is characterized in that; Said external membrane assembly is provided with the mud discharging mouth that is communicated to continuous flow biological reaction tank; Be trapped in membrane module outer granule sludge or other PM for particulate matters and will return continuous flow biological reaction tank, or discharge as excess sludge through this mud discharging mouth.
10. external placed type continuous-flow aerobic granular sludge membrane bioreactor as claimed in claim 1; It is characterized in that; The second section that said aerator comprises the first part that is communicated to the continuous flow biological reaction device and is communicated to said external membrane assembly below; First part is that bio-degradation reactions provides essential oxygen, and said second section is that membrane module provides effective scrubbing action.
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Cited By (8)

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CN103588296A (en) * 2013-11-20 2014-02-19 乐金电子研发中心(上海)有限公司 Method for treating sewage by using anaerobic membrane bioreactor to remove sulphur and nitrogen
CN105254114A (en) * 2015-07-22 2016-01-20 武汉美法生物科技有限公司 Simple membrane bioreactor and use method thereof
CN107010720A (en) * 2017-06-14 2017-08-04 北京工业大学 A kind of high-efficiency aerobic granule sludge continuous flow reactor and operation method
CN108238673A (en) * 2016-12-23 2018-07-03 李彦民 A kind of method and device for cultivating aerobic particle mud
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CN110451635A (en) * 2019-06-24 2019-11-15 重庆大学科技企业(集团)有限责任公司 A kind of biological treatment system and method for high organic matter industrial wastewater with high salt
CN110577325A (en) * 2019-08-09 2019-12-17 重庆大学 Processing system of high salt high organic matter waste water resourceization and zero release
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CN108238673A (en) * 2016-12-23 2018-07-03 李彦民 A kind of method and device for cultivating aerobic particle mud
CN107010720A (en) * 2017-06-14 2017-08-04 北京工业大学 A kind of high-efficiency aerobic granule sludge continuous flow reactor and operation method
CN107010720B (en) * 2017-06-14 2020-07-31 北京工业大学 Efficient aerobic granular sludge continuous flow reactor and operation method thereof
CN109095601A (en) * 2018-10-25 2018-12-28 江西理工大学 Aerobic granular sludge reactor operation stability based on size controlling maintains method
CN109095601B (en) * 2018-10-25 2021-07-06 江西理工大学 Method for maintaining operation stability of aerobic granular sludge reactor based on particle size control
CN110451635A (en) * 2019-06-24 2019-11-15 重庆大学科技企业(集团)有限责任公司 A kind of biological treatment system and method for high organic matter industrial wastewater with high salt
CN110577325A (en) * 2019-08-09 2019-12-17 重庆大学 Processing system of high salt high organic matter waste water resourceization and zero release
CN111977786A (en) * 2020-09-18 2020-11-24 广东粤海水务投资有限公司 Double-aeration aerobic granular sludge-membrane bioreactor coupling device and application thereof

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