WO2000018498A1 - Apparatus and method for cleaning membrane filtration modules - Google Patents
Apparatus and method for cleaning membrane filtration modules Download PDFInfo
- Publication number
- WO2000018498A1 WO2000018498A1 PCT/AU1999/000817 AU9900817W WO0018498A1 WO 2000018498 A1 WO2000018498 A1 WO 2000018498A1 AU 9900817 W AU9900817 W AU 9900817W WO 0018498 A1 WO0018498 A1 WO 0018498A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- membrane
- membranes
- membrane module
- liquid
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/04—Membrane cleaning or sterilisation ; Membrane regeneration with movable bodies, e.g. foam balls
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/024—Hollow fibre modules with a single potted end
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/033—Specific distribution of fibres within one potting or tube-sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/14—Specific spacers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/18—Use of gases
- B01D2321/185—Aeration
-
- 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
Definitions
- TITLE APPARATUS AND METHOD FOR CLEANING MEMBRANE FILTRATION
- membrane bioreactors combining biological and
- membrane bioreactors can range from household (such as
- backwash backpulse, backflush
- membrane surface scrubbing or scouring using a gas in the form of bubbles in a liquid.
- a gas is injected, usually by means of a pressurised
- the bubbles so formed then travel upwards to scrub the membrane surface to remove the
- the gas distribution system may gradually become blocked by dehydrated solids or simply
- membrane module as used herein is defined as the cross-sectional potted area taken up by
- the present invention seeks to overcome or least
- the present invention provides a method of scrubbing a
- membrane surface using a liquid medium with gas bubbles entrained therein including the
- the gas bubbles are entrained into said liquid stream by means of a
- venturi device for further preference, the gas bubbles are entrained or injected into said
- mixture of liquid and bubbles such devices including a jet, nozzle, ejector, eductor, injector or the like.
- an additional source of bubbles may be provided in said
- the gas used may include air, oxygen,
- Gaseous chlorine may be used for scrubbing, disinfection and enhancing
- the present invention provides a membrane module
- said liquid and bubbles are mixed and then flowed past membranes to
- the present invention provides a method of
- membranes mounted and extending longitudinally in an array to form a membrane module
- said membranes being arranged in close proximity to one another and mounted to prevent
- the method comprising the steps of providing, from
- said bubbles are injected and mixed into said
- the membranes comprise porous hollow fibres, the fibres being fixed
- the lower header having one or more holes formed therein through
- the holes can be circular, elliptical or in the form of a
- the fibres are normally sealed at the lower end and open at their upper end to allow
- the fibres may be open at both ends to
- the fibres are preferably arranged in
- the present invention provides a membrane module
- fibre membranes comprising a plurality of porous hollow fibre membranes, said fibre membranes being
- fibre membranes being fixed at each end in a header, one header having
- partition means extending at least part way between said headers to partition said
- the partition means are formed by a spacing
- the partitions may be parallel to each other or, in the
- the partitions may extend radially from the centre of the array or be positioned concentrically within the cylindrical array.
- the fibre bundle may be provided with a central longitudinal passage
- the present invention provides a membrane module
- a membrane bioreactor including a plurality of porous hollow membrane fibres
- said membrane fibres being arranged in close proximity to one another and mounted to
- fibres being partitioned into a number of
- one of said potting heads having an array of aeration openings formed
- the fibre bundle is protected and fibre movement is limited by a module support
- said aeration openings are positioned to coincide with the spaces formed
- said openings comprise a slot, slots or a
- the fibre bundles are located in the potting head between the slots
- gas bubbles are entrained or mixed with a liquid flow
- the liquid used may be the feed to the membrane module.
- the fibres and/or fibre bundles may cross over one another between the potting heads though it is desirable that they do not.
- the fibres within the module have a packing density (as defined above) of
- said holes have a diameter in the range of about 1 to 40 mm and more
- the open area is chosen to be equivalent to that of the above holes.
- the fibre inner diameter ranges from about 0.1 mm to about 5 mm and is
- the fibres wall thickness is
- wall thickness is between 0.05 to 2 mm and more often between 0.1 mm to 1 mm.
- the present invention provides a membrane bioreactor
- the present invention provides a method of
- the membrane fibres to dislodge fouling materials therefrom.
- the gas bubbles Preferably, the gas bubbles
- a further source of aeration may be provided within the tank to assist microorganism activity.
- the membrane module is suspended vertically
- the further source of aeration comprises a group of air permeable
- the membrane module may be operated with or without backwash depending on
- partitioned fibre bundles enables higher packing densities to be achieved without
- Figure 1 shows a schematic side elevation of one embodiment of a membrane
- Figure 2 shows an enlarged schematic side elevation of one form of the jet type
- Figure 3a shows a schematic side elevation of a partitioned membrane module
- Figure 3b shows a section through the membrane bundle of Figure 3a
- Figure 4a shows a schematic side elevation of a partitioned membrane module according to a further embodiment of the present invention
- Figure 4b shows a section through the membrane bundle of Figure 4a
- Figure 5a shows a schematic side elevation of a partitioned membrane module
- Figure 5b shows a section through the membrane bundle of Figure 5a
- Figure 6a shows a schematic side elevation of a partitioned membrane module
- Figure 6b shows a section through the membrane bundle of Figure 6a
- Figure 7 shows a similar view to Figure 2 of a further embodiment of the invention.
- Figure 8 shows a similar view to Figure 2 of yet a further embodiment of the
- Figure 9 shows a sectioned perspective pictorial view of the lower end of another
- Figure 10 shows a sectioned perspective pictorial view of the upper end of the
- the membrane module 5 typically comprises fibre, tubular or flat sheet form membranes 6
- Either one or both ends of the membranes may be used for the permeate collection.
- the bottom of the membrane module has a number of through apertures 10 in the pot 11 to
- a venturi device 12 or the like is
- the venturi device 12 intakes gas through inlet 13,
- liquid feed or the gas can be a liquid feed or the gas
- venturi device 12 can be a venturi tube, jet, nozzle, ejector, eductor, injector or the like.
- liquid is forced through a jet 16 having a surrounding air passage 17 to
- the liquid commonly used to entrain the gas is the feed water, wastewater or mixed
- a vacuum to suck the gas into the liquid, or reduces the gas discharge pressure when a
- blower is used. By providing the gas in a flow of the liquid, the possibility of blockage of
- the distribution apertures 10 is substantially reduced.
- distribution device can eliminate the formation of dehydrated solids and therefore prevent
- the injection arrangement further provides an efficient cleaning mechanism for
- the module configuration described allows a higher fibre packing density in a
- membrane modules can be either integrated into the aerobic basin or arranged in a
- process fluid often enters one end of the tank and concentrates as it moves across the
- Such a cleaning method can be used to the treatment of drinking water, wastewater
- the filtration process can be driven by suction or
- FIG. 3 shows a bundle of tubular membranes 20 partitioned vertically into several
- Another method of forming a partitioned module is to pot
- central membrane-free zone forms a passage 24 to allow for more air and liquid injection.
- a single gas or a mixture of gas/liquid can be injected into the module.
- Figure 6 illustrates yet a further embodiment similar to Figure 5 but with single
- fibre membranes 20 are spread adjacent the hole 30 and
- FIGS. 7 and 8 show further embodiments of the invention having a similar
- the module 45 comprises a plurality of
- hollow fibre membrane bundles 46 mounted in and extending between an upper 47 and
- the potting heads 47 and 48 are mounted in respective potting
- bundles 46 are surrounded by a screen 51 to prevent excessive movement between the
- the lower potting head 48 is provided with a number of
- the aeration holes 52 are positioned to generally coincide with the partition
- the lower potting sleeve 50 forms a cavity 55 below the lower pot 48.
- Air is preferably introduced into the module continuously to provide oxygen for
- filtrate is drawn out of the membranes by a suction pump attached to the membrane lumens
- the membrane module is operated under low transmembrane pressure
- TMP suspended solids
- the membrane bioreactor is preferably combined with an anaerobic process which
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
Description
Claims
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002342346A CA2342346C (en) | 1998-09-25 | 1999-09-24 | Apparatus and method for cleaning membrane filtration modules |
AU61834/99A AU752765B2 (en) | 1998-09-25 | 1999-09-24 | Apparatus and method for cleaning membrane filtration modules |
JP2000572010A JP5038555B2 (en) | 1998-09-25 | 1999-09-24 | Filtration membrane module cleaning apparatus and cleaning method |
KR1020077003509A KR100832673B1 (en) | 1998-09-25 | 1999-09-24 | Filtration system, membrane module and method for cleaning the module |
NZ510394A NZ510394A (en) | 1998-09-25 | 1999-09-24 | A method and apparatus for scrubbing a membrane surface using a liquid medium with gas bubbles incorporated therein |
EP99948614A EP1115474A4 (en) | 1998-09-25 | 1999-09-24 | Apparatus and method for cleaning membrane filtration modules |
US09/815,966 US6524481B2 (en) | 1998-09-25 | 2001-03-23 | Apparatus and method for cleaning membrane filtration modules |
US10/303,447 US6641733B2 (en) | 1998-09-25 | 2002-11-21 | Apparatus and method for cleaning membrane filtration modules |
US10/428,601 US6821420B2 (en) | 1998-09-25 | 2003-05-01 | Apparatus and method for cleaning membrane filtration modules |
US10/822,036 US6841070B2 (en) | 1997-09-25 | 2004-04-08 | Apparatus and method for cleaning membrane filtration modules |
US11/025,418 US20050109692A1 (en) | 1998-09-25 | 2004-12-28 | Apparatus and method for cleaning membrane filtration modules |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPP6217 | 1998-09-25 | ||
AUPP6218A AUPP621898A0 (en) | 1998-09-25 | 1998-09-25 | Apparatus and method for cleaning membrane filtration modules |
AUPP6218 | 1998-09-25 | ||
AUPP6217A AUPP621798A0 (en) | 1998-09-25 | 1998-09-25 | Membrane bioreactor |
AUPQ1112A AUPQ111299A0 (en) | 1999-06-21 | 1999-06-21 | Improved membrane bioreactor |
AUPQ1112 | 1999-06-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/815,966 Continuation US6524481B2 (en) | 1997-09-25 | 2001-03-23 | Apparatus and method for cleaning membrane filtration modules |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000018498A1 true WO2000018498A1 (en) | 2000-04-06 |
Family
ID=27158102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1999/000817 WO2000018498A1 (en) | 1997-09-25 | 1999-09-24 | Apparatus and method for cleaning membrane filtration modules |
Country Status (11)
Country | Link |
---|---|
US (1) | US6524481B2 (en) |
JP (1) | JP5038555B2 (en) |
KR (2) | KR100704328B1 (en) |
CN (1) | CN1147349C (en) |
AU (1) | AU752765B2 (en) |
CA (1) | CA2342346C (en) |
MX (2) | MX257860B (en) |
MY (1) | MY121098A (en) |
NZ (1) | NZ510394A (en) |
TW (1) | TWI222895B (en) |
WO (1) | WO2000018498A1 (en) |
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Publication number | Publication date |
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KR100704328B1 (en) | 2007-04-09 |
MX236005B (en) | 2006-04-19 |
AU6183499A (en) | 2000-04-17 |
JP5038555B2 (en) | 2012-10-03 |
CN1147349C (en) | 2004-04-28 |
US20010047962A1 (en) | 2001-12-06 |
CN1319032A (en) | 2001-10-24 |
KR20070034110A (en) | 2007-03-27 |
KR20010079919A (en) | 2001-08-22 |
TWI222895B (en) | 2004-11-01 |
KR100832673B1 (en) | 2008-05-27 |
US6524481B2 (en) | 2003-02-25 |
MY121098A (en) | 2005-12-30 |
MX257860B (en) | 2008-06-12 |
NZ510394A (en) | 2003-05-30 |
JP2002525197A (en) | 2002-08-13 |
AU752765B2 (en) | 2002-09-26 |
CA2342346A1 (en) | 2000-04-06 |
CA2342346C (en) | 2008-04-15 |
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