CN2926211Y - Composite aerating membrane biological reactor - Google Patents
Composite aerating membrane biological reactor Download PDFInfo
- Publication number
- CN2926211Y CN2926211Y CNU2006200143203U CN200620014320U CN2926211Y CN 2926211 Y CN2926211 Y CN 2926211Y CN U2006200143203 U CNU2006200143203 U CN U2006200143203U CN 200620014320 U CN200620014320 U CN 200620014320U CN 2926211 Y CN2926211 Y CN 2926211Y
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- aeration
- aeration tube
- reaction tank
- tube head
- pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a compound aeration membrane reactor which includes an organism reaction tank, an aeration device and a membrane module provided in the organism reaction tank under the liquid level. The aeration device includes an aerated pipe provided in the organism reaction tank, and a pump arranged outside the membrane reactor. The aerated pipe is connected with the pump through a pipeline. The aeration device includes mutually independent perforated aeration devices and a millipore aeration device. An aeration mouth piece of a perforated aeration pipe is provided under the membrane module; a millipore aeration mouth piece of a millipore aeration pipe is provided under the organism reaction tank. The aperture of the millipore aeration mouth piece of the millipore aeration pipe is smaller than the aeration mouth piece of a perforated aeration pipe. The two aeration mouth pieces leave misalignment on the facade. Through the combination of the two ways of aeration, also under the same aeration mount, the utility model can improve the utilization ratio of oxygen of the membrane reactor and reduce energy consumption in processing waste water, in particular suitable for the waste water with higher organic materials consistency.
Description
Technical field
The utility model relates to a kind of sewage disposal device, relates in particular to a kind of membrane bioreactor with higher load organic waste water that is used for handling.
Background technology
Membrane bioreactor (MBR) technology is the waste water treatment process that modern membrane filtration technique and traditional activated sludge process organically combine.Membrane bioreactor mainly is made up of bio-reactor and membrane separation apparatus (membrane module) two portions.Bio-reactor mainly is the main place of contaminant degradation in the waste water; Membrane separation apparatus mainly is solid-liquid separation and some macromolecular cpds is played crown_interception that employed film is generally ultrafiltration or microfiltration membrane.Cardinal principle is to utilize ultra-filtration membrane or microfiltration membrane to carry out solid-liquid separation, has replaced the secondary sedimentation basins of traditional activated sludge process; Because the filteration of film, can realize sludge retention time (SRT) and hydraulic detention time (HRT) independent control, but make this treatment process have good effect of separating solid from liquid, biochemical efficiency height, produce the stable and reuse of water high-quality, advantage such as sludge concentration height, capacity of resisting impact load are strong; And owing to save secondary sedimentation basins, and do not have mud and reflux, thereby equipment is concentrated, floor space is little, investment cost and working cost reduce.
In actual applications, because microorganism concn height in the MBR pond, these microorganisms are easy to be attached on the film surface, extracellular polymeric EPS (Extra-celluarpolrmers) content owing to microorganisms is directly proportional with microorganism concn in addition, accumulation can cause that the mixed solution viscosity increases and concentration polarization, pollutes membrane module in mud mixed liquid; Film pollutes can be divided into internal contamination and external contamination, and internal contamination refers to obstruction and the absorption of material in fenestra less than fenestra, and external contamination refers to that solid matter combines formed settled layer by the materialization effect with film close, comprises that cake layer and gel coat pollute; Wherein, it is the major portion that film pollutes that settled layer pollutes, and overcoming the settled layer pollution is to solve one of effective way of membrane pollution problem.
The existing primary structure that uses aeration mode to avoid or alleviate the membrane bioreactor that settled layer pollutes is to be positioned at below the little/supermembrane assembly of membrane bioreactor, aeration tube is installed, produce rising air water mixed flow when utilizing aeration, forming cross-flow on the membrane module surface washes away, produce flow shear, reach the pollution that alleviates membrane module; Aforementioned aerating apparatus also has effects such as replenishing the interior oxygen of membrane bioreactor simultaneously concurrently, the dissolved oxygen value (being common described DO value) in the pending waste water is maintained about 2～3mg/L, to guarantee or the raising biochemical efficiency.
In membrane bioreactor, aeration mode commonly used mainly contains two kinds of boring aeration and micro-pore aerations, the bubble aperture that common boring aeration mode produces is relatively large, the cross-flow scouring intensity that produces during aeration is bigger, it is better that the settled layer on membrane module surface is removed effect, but coefficient of oxygen utilization low (3～7%), the shortcoming that the sewage disposal energy consumption is high are also arranged simultaneously; And the bubble aperture that common micro-pore aeration mode produces is less relatively, but the coefficient of oxygen utilization of this mode reaches 22% than higher, can significantly reduce the sewage disposal energy consumption.
Available technology adopting is below membrane module, a kind of membrane bioreactor of aeration tube is installed, when processing has sewage than high organic loading, have following problem: because organic loading increases, cause microorganism to breed in a large number, sludge concentration uprises, and produces a large amount of EPS simultaneously, increases the weight of deposition and the concentration polarization phenomenon of microorganism on the membrane module surface; Fenestra stops up serious, causes the membrane module flux to descend; In order to slow down the film pollution that the organic loading increase causes, need to increase aeration rate, improve the upflow velocity of air water mixed flow, to strengthen the air water mixed flow cross-flow of membrane module is washed away, reduce the deposition of pollutent on the film surface, keep the interior DO value of reaction tank simultaneously; At this moment, adopt the mode of boring aeration, the 30-60 that aeration rate is generally the water yield doubly or higher just can satisfy aforementioned service requirements.Though little/ultra-filtration membrane itself has certain tensile strength, excessive to the cross-flow scouring intensity of little/ultra-filtration membrane as the rising mixed flow, the air water shearing force is also corresponding bigger, and this can greatly shorten film work-ing life; Disconnect as hollow-fibre membrane film silk, film silk internal contamination increases the weight of, and causes flux to diminish, the effluent quality variation; In addition, bigger aeration rate also will make the energy consumption of equipment greatly increase, and too high energy consumption has increased processing cost, has restricted applying of membrane biological reactor process.And the mode of micro-pore aeration is not enough to again in good time, effectively clears the pollution off in the deposition on membrane module surface when processing has sewage than high organic loading, be difficult to assurance equipment for a long time, operation stably.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that above-mentioned prior art exists, and provides a kind of energy consumption relatively low and composite aeration type membrane bioreactor that still can steady running.
According to the utility model, a kind of composite aeration type membrane bioreactor, comprise biological reaction tank, aerating apparatus and be installed in the described biological reaction tank and be dipped in subsurface membrane module, described aerating apparatus comprises the aeration tube that is installed in the described biological reaction tank, the air pump that is arranged on the membrane bioreactor outside, described aeration tube is connected with described air pump by pipeline, described aerating apparatus comprises separate aeration tube and the air pump of two covers: a cover is the boring aeration device, and the aeration tube head of boring aeration pipe is installed in the below of described membrane module; Another set of is microporous aeration device, and the micro-pore aeration tube head of micropore aeration pipe is installed in the below in the described biological reaction tank; The aeration tube head of the more described boring aeration pipe in aperture of the aeration tube head of described micropore aeration pipe is little;
The combination of the utility model by two kinds of aeration modes, boring aeration mode are used for the film surface carried out that air water is two to be washed, and overcome film surface contaminant deposition, and the micro-pore aeration mode then can be kept the required enough dissolved oxygens of microbial biochemical reaction in the membrane bioreactor.The characteristics that the coefficient of oxygen utilization that utilizes microporous aeration device to have is higher, therefore under identical aeration rate, make the coefficient of oxygen utilization of membrane bioreactor, the membrane bioreactor from simple employing boring aeration mode significantly improves, and under the same oxygen utilization ratio, only need less aeration rate, therefore, the energy consumption of handling waste water also can significantly reduce, and is applicable to the MBR technology of higher organic concentration sewage disposal.
Description of drawings
Fig. 1 is the Sewage treatment systems structure diagram that composite aeration type membrane bioreactor described in the utility model is installed;
Fig. 2 is the aerated conduit mounting plane synoptic diagram of composite aeration type membrane bioreactor described in the utility model;
Fig. 3 is the cross-sectional view of the A-A direction of composite aeration type membrane bioreactor shown in Figure 2;
Fig. 4 is the cross-sectional view of the B-B direction of composite aeration type membrane bioreactor shown in Figure 2.
Embodiment
With reference to accompanying drawing 1 and accompanying drawing 2, higher concentration organic waste water is as entering equalizing tank 5 after the solid sundries of hospital sewage in grid removal water, homogenizing, buffering water quality and quantity in equalizing tank, in equalizing tank, also can add the aeration facility, make higher concentration organic waste water be able to abundant aeration and mix; Entering the membrane biological reaction pond after the lift pump pump promotes handles.The oxygen that the membrane biological reaction pond needs is supplied with by two cover aerating systems, is respectively boring aeration device and microporous aeration device, and organic waste water is finished the organism biochemical degradation and removed the ammonia nitrogen process in the membrane biological reaction pond.Mixed solution after the processing carries out mud-water separation by ultra-filtration membrane, produces water reuse or discharging.
Composite aeration type membrane bioreactor described in the utility model, comprise biological reaction tank 1, aerating apparatus and be installed in the described biological reaction tank and be dipped in subsurface membrane module 2, this membrane module 2 can be selected ultrafiltration or microfiltration membrane as required for use, as tubular fibre little/ultra-filtration membrane, plate-type hyperfiltration membrane all can.
Aerating apparatus comprises the air pump that is installed in the aeration tube in the biological reaction tank 1 and is arranged on the membrane bioreactor outside, aeration tube is connected with the air pump 33 that is arranged on the membrane bioreactor outside in due form by pipeline 32, the difference of the utility model and prior art is, aforementioned aerating apparatus comprises aeration tube that two covers are separate and the air pump that is communicated with it: a cover is the boring aeration device, the aeration tube head 31 of boring aeration pipe 3 is installed in the below of membrane module 2, be used for producing relatively large bubble, make in aeration process, ultrafiltration or microfiltration membrane surface are tried one's best effectively, air water is two completely washes, thereby overcomes film surface contaminant deposition;
Another set of aerating apparatus is a microporous aeration device, the micro-pore aeration tube head 41 of micropore aeration pipe 4 is installed in the below in the biological reaction tank 1, because the aperture of the aeration tube head 41 of micropore aeration pipe 4 is little than the aeration tube head 31 of boring aeration pipe, therefore under the identical aeration rate, the number of bubbles that aeration tube head 41 can produce is bigger and more intensive, the contact area of bubble and water is relatively large, thereby can the pending waste water in the pond provide as much as possible oxygen, guarantee the concentration of dissolved oxygen, to satisfy the needs of microbial biochemical reaction.
Aforementioned micro-pore aeration tube head 41 preferably and boring aeration tube head 31 on facade, leave dislocation; Leave dislocation on the described facade and be meant that each micro-pore aeration tube head 41 and boring aeration tube head 31 be not each other on same facade, as shown in Figure 2, in order to avoid the bubbles that are used for aeration that two kinds of different aeration tube heads of effect produce influence each other at uphill process, and then reduce or weaken the overall efficacy of different aerating apparatuss.
Usually, when membrane module is positioned at the mid-way in described membrane biological reaction pond, be provided with a plurality of boring aeration tube heads 31 on the boring aeration pipe 3 at interval in an orderly manner, each boring aeration tube head 31 be distributed in as far as possible membrane module 2 under or under location about, purpose is under identical aeration rate, make perforation bubble in rising, aeration process with larger aperture, more effectively around membrane module 2, form the cross-flow that to wash away membrane module 2 surface deposition layers, increase flow shear as far as possible, reduce, reduce the deposition degree of pollutent on the film surface; On micropore aeration pipe, also can be provided with a plurality of micro-pore aeration tube heads at interval in an orderly manner, each micro-pore aeration tube head is in order to leave dislocation with aforementioned each boring aeration tube head 31 on facade, can be distributed in the peripheral position of below in the described biological reaction tank, guarantee micro-pore aeration tube head replenishing to oxygen in the membrane biological reaction pond, for the microbial biochemical reaction in the reaction tank provides enough dissolved oxygens, make microorganism carry out efficient degradation to organism; Be not difficult to find out from above-mentioned analysis, under relatively low aeration rate, the utility model can maintain membrane bioreactor DO value about 2～3mg/l, satisfies the primary demand of microbial biochemical reaction to oxygen in water, thereby significantly reduces the wastewater treatment energy consumption.
In membrane bioreactor of the present utility model, during concrete the installation, the opening direction of each boring aeration tube head can be provided with downwards, its purpose and function are to prevent each open pore of boring aeration tube head in use by sludge blockage, can guarantee that aeration is even simultaneously.
Can also further be serially connected with monitoring devices such as gas meter 35, weather gage 34 and valve 36 between the air pump of each aeration tube and connection with it, with the aeration rate that adjustment is imported according to the detection index at any time in membrane bioreactor.Above-mentioned air pump can use common gas blower, each aeration tube head opening diameter of boring aeration pipe be typically chosen in 4 or 5mm about comparatively suitable, can satisfy service requirements and the aeration tube head of microporous aeration device preferably is chosen in 80～200 μ m.
As the ultrafiltration of membrane module or microfiltration membrane when mounted, preferably can make ultrafiltration or microfiltration membrane be to a certain degree relaxed state, like this, can make the air water mixed flow when washing away, keep film silk/surface vibration, thereby improve clean deposition thing efficient.
The concrete use-pattern of device of the present utility model is: pending waste water enters the membrane biological reaction pond after lift pump promotes, open the gas blower of boring aeration device, air enters boring aeration pipe 3 through aerated conduit, below membrane module 2, form air water mixing upwelling, produce air water stream shearing force, the film surface is washed away, and the block film surface deposition pollutes, and keeps stable membrane flux.
Open the gas blower of microporous aeration device, air enters micropore aeration pipe 4 through aerated conduit, because the efficient coefficient of oxygen utilization of micropore aeration pipe can replenish biochemical required dissolved oxygen to microorganism, microorganism carries out efficient degradation to organism.
Need to prove aforementioned opening sequence, and have no special requirements, can open simultaneously, also can successively open, decide on the concrete monitor control index of current water quality in the membrane bioreactor.After using for some time, the mud in the biological reaction tank 1 can be taken away by sludge pump 6; Water purification by membrane module 2 gained outputs to clean water basin 71 by going out water pump 7; The outlet conduit that communicates with membrane module 2 can also further join with backwash device 8, membrane module 2 is carried out backwash in good time.
Our bright composite aeration type MBR technology is simple, easy for installation, economical and practical, and floor space is little.Adopt boring aeration rinsing membrane module and micro-pore aeration oxygen supply process combined principle, when having solved in the normal film bioreactor technology aeration, the problem that oxygen transfer efficient is lower has reduced the aeration energy consumption of conventional film bio-reactor; Also have the conventional film bio-reactor simultaneously and can not handle ability than high organic loading, when even the water inlet of its processing reaches 350mg/L～2500mg/L at CODcr, during as hospital sewage, but still can guarantee the water outlet qualified discharge or be back to production technique, so the utility model can use in the processing of various scales has than high organic loading waste water engineering widely.
Claims (6)
1. composite aeration type membrane bioreactor, comprise biological reaction tank, aerating apparatus and be installed in the described biological reaction tank and be dipped in subsurface membrane module, described aerating apparatus comprises the aeration tube that is installed in the described biological reaction tank, the air pump that is arranged on the membrane bioreactor outside, described aeration tube is connected with described air pump by pipeline, it is characterized in that: described aerating apparatus comprises separate aeration tube and the air pump of two covers: a cover is the boring aeration device, and the aeration tube head of boring aeration pipe is installed in the below of described membrane module; Another set of is microporous aeration device, and the micro-pore aeration tube head of micropore aeration pipe is installed in the below in the described biological reaction tank; The aeration tube head of the more described boring aeration pipe in aperture of the aeration tube head of described micropore aeration pipe is little.
2. composite aeration type membrane bioreactor as claimed in claim 1 is characterized in that: the micro-pore aeration tube head of described micropore aeration pipe and described boring aeration tube head leave dislocation on facade.
3. composite aeration type membrane bioreactor as claimed in claim 1 or 2, it is characterized in that: described membrane module is positioned at the mid-way of described biological reaction tank, at interval a plurality of boring aeration tube heads that are provided with in an orderly manner be distributed in described membrane module under or under around, also be provided with a plurality of micro-pore aeration tube heads on the described micropore aeration pipe at interval in an orderly manner, described each micro-pore aeration tube head is distributed in the peripheral position of below in the described biological reaction tank.
4. composite aeration type membrane bioreactor as claimed in claim 3 is characterized in that: the opening direction of described boring aeration tube head is downward.
5. composite aeration type membrane bioreactor as claimed in claim 4 is characterized in that: also be serially connected with gas meter, weather gage and valve between the air pump of described aeration tube and connection with it.
6. composite aeration type membrane bioreactor as claimed in claim 5 is characterized in that: the aperture of described boring aeration tube head is between 4-5mm; The aperture of described micro-pore aeration tube head is between 80～200 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200143203U CN2926211Y (en) | 2006-06-28 | 2006-06-28 | Composite aerating membrane biological reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200143203U CN2926211Y (en) | 2006-06-28 | 2006-06-28 | Composite aerating membrane biological reactor |
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| CN2926211Y true CN2926211Y (en) | 2007-07-25 |
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| CNU2006200143203U Expired - Fee Related CN2926211Y (en) | 2006-06-28 | 2006-06-28 | Composite aerating membrane biological reactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884131B (en) * | 2006-06-28 | 2010-05-12 | 深圳市金达莱环保股份有限公司 | Composite aeration type membrane bioreactor |
| CN104386882A (en) * | 2014-11-26 | 2015-03-04 | 武汉市润之达石化设备有限公司 | Biological ultrafiltration membrane sewage treatment device |
| CN106830317A (en) * | 2017-02-21 | 2017-06-13 | 青岛思普润水处理股份有限公司 | A kind of sewage disposal system and method |
| CN111704317A (en) * | 2020-06-28 | 2020-09-25 | 重庆工商大学 | Method for slowing down membrane pollution of aerobic granular sludge membrane bioreactor |
-
2006
- 2006-06-28 CN CNU2006200143203U patent/CN2926211Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884131B (en) * | 2006-06-28 | 2010-05-12 | 深圳市金达莱环保股份有限公司 | Composite aeration type membrane bioreactor |
| CN104386882A (en) * | 2014-11-26 | 2015-03-04 | 武汉市润之达石化设备有限公司 | Biological ultrafiltration membrane sewage treatment device |
| CN104386882B (en) * | 2014-11-26 | 2016-08-24 | 武汉市润之达石化设备有限公司 | A kind of ultrafiltration biofilm sewage treatment device |
| CN106830317A (en) * | 2017-02-21 | 2017-06-13 | 青岛思普润水处理股份有限公司 | A kind of sewage disposal system and method |
| CN111704317A (en) * | 2020-06-28 | 2020-09-25 | 重庆工商大学 | Method for slowing down membrane pollution of aerobic granular sludge membrane bioreactor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangxi JDL Environmental Protection Research Ltd. Assignor: Jiangxi JDL Environmental Protection Research Ltd.|Shenzhen Jindalai Environmental Protection Co., Ltd. Contract fulfillment period: 2008.11.1 to 2013.10.31 Contract record no.: 2008360000057 Denomination of utility model: Composite aeration type membrane bioreactor Granted publication date: 20070725 License type: Exclusive license Record date: 20081111 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.1 TO 2013.10.31; CHANGE OF CONTRACT Name of requester: JIANGXI JINDALAI ENVIRONMENT PROTECTION RESEARCH C Effective date: 20081111 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070725 Termination date: 20100628 |