EP1115474A1 - Apparatus and method for cleaning membrane filtration modules - Google Patents
Apparatus and method for cleaning membrane filtration modulesInfo
- Publication number
- EP1115474A1 EP1115474A1 EP99948614A EP99948614A EP1115474A1 EP 1115474 A1 EP1115474 A1 EP 1115474A1 EP 99948614 A EP99948614 A EP 99948614A EP 99948614 A EP99948614 A EP 99948614A EP 1115474 A1 EP1115474 A1 EP 1115474A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- membrane
- membranes
- membrane module
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
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
Abstract
Description
Claims
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPP621898 | 1998-09-25 | ||
AUPP6217A AUPP621798A0 (en) | 1998-09-25 | 1998-09-25 | Membrane bioreactor |
AUPP621798 | 1998-09-25 | ||
AUPP6218A AUPP621898A0 (en) | 1998-09-25 | 1998-09-25 | Apparatus and method for cleaning membrane filtration modules |
AUPP111299 | 1999-06-21 | ||
AUPP111299 | 1999-06-21 | ||
PCT/AU1999/000817 WO2000018498A1 (en) | 1998-09-25 | 1999-09-24 | Apparatus and method for cleaning membrane filtration modules |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1115474A1 true EP1115474A1 (en) | 2001-07-18 |
EP1115474A4 EP1115474A4 (en) | 2005-03-30 |
Family
ID=27158059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99948614A Ceased EP1115474A4 (en) | 1998-09-25 | 1999-09-24 | Apparatus and method for cleaning membrane filtration modules |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1115474A4 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5209852A (en) * | 1990-08-31 | 1993-05-11 | Japan Organo Co. Ltd. | Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module |
US5271830A (en) * | 1989-12-11 | 1993-12-21 | Gie Anjou-Recherche | Water treatment installation for a tangential filtration loop |
DE29804927U1 (en) * | 1998-03-13 | 1998-06-10 | Rochem Ro Wasserbehandlung Gmbh | Device for separating liquid media contaminated with foreign substances |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61242607A (en) * | 1985-04-22 | 1986-10-28 | Asahi Chem Ind Co Ltd | Preparation of hollow yarn type module having slit |
JPS61291007A (en) * | 1985-06-17 | 1986-12-20 | Toyobo Co Ltd | Hollow yarn type separation membrane element |
JPS61293504A (en) * | 1985-06-24 | 1986-12-24 | Kurita Water Ind Ltd | Separation device utilizing hollow yarn membrane |
JPH06343837A (en) * | 1993-06-02 | 1994-12-20 | Ebara Infilco Co Ltd | Hollow fiber membrane module |
JPH07136471A (en) * | 1993-11-15 | 1995-05-30 | Toray Ind Inc | Hollow yarn membrane module |
JPH07185268A (en) * | 1993-12-28 | 1995-07-25 | Toray Ind Inc | Hollow fiber filter membrane element and module |
JPH07303895A (en) * | 1994-05-16 | 1995-11-21 | Kubota Corp | Water treatment apparatus |
JP3671473B2 (en) * | 1995-10-05 | 2005-07-13 | 栗田工業株式会社 | Immersion membrane separator |
JPH1085565A (en) * | 1996-09-19 | 1998-04-07 | Yamada Kogyo Kk | Membrane separator |
-
1999
- 1999-09-24 EP EP99948614A patent/EP1115474A4/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5271830A (en) * | 1989-12-11 | 1993-12-21 | Gie Anjou-Recherche | Water treatment installation for a tangential filtration loop |
US5209852A (en) * | 1990-08-31 | 1993-05-11 | Japan Organo Co. Ltd. | Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module |
DE29804927U1 (en) * | 1998-03-13 | 1998-06-10 | Rochem Ro Wasserbehandlung Gmbh | Device for separating liquid media contaminated with foreign substances |
Non-Patent Citations (10)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 011, no. 089 (C-411), 19 March 1987 (1987-03-19) -& JP 61 242607 A (ASAHI CHEM IND CO LTD), 28 October 1986 (1986-10-28) -& DATABASE WPI Section Ch, Week 198649 Derwent Publications Ltd., London, GB; Class A88, AN 1986-323879 XP002315442 & JP 61 242607 A (ASAHI CHEM IND CO LTD) 28 October 1986 (1986-10-28) * |
PATENT ABSTRACTS OF JAPAN vol. 011, no. 159 (C-423), 22 May 1987 (1987-05-22) -& JP 61 291007 A (TOYOBO CO LTD), 20 December 1986 (1986-12-20) -& DATABASE WPI Section Ch, Week 198705 Derwent Publications Ltd., London, GB; Class D15, AN 1987-033812 XP002315443 & JP 61 291007 A (TOYOBO KK) 20 December 1986 (1986-12-20) * |
PATENT ABSTRACTS OF JAPAN vol. 011, no. 163 (C-424), 26 May 1987 (1987-05-26) -& JP 61 293504 A (KURITA WATER IND LTD), 24 December 1986 (1986-12-24) -& DATABASE WPI Section Ch, Week 198706 Derwent Publications Ltd., London, GB; Class J01, AN 1987-039038 XP002315445 & JP 61 293504 A (KURITA WATER IND LTD) 24 December 1986 (1986-12-24) * |
PATENT ABSTRACTS OF JAPAN vol. 199, no. 503, 28 April 1995 (1995-04-28) & JP 06 343837 A (EBARA INFILCO CO LTD), 20 December 1994 (1994-12-20) -& DATABASE WPI Section Ch, Week 199510 Derwent Publications Ltd., London, GB; Class J01, AN 1995-069412 XP002303586 & JP 06 343837 A (EBARA INFILCO KK) 20 December 1994 (1994-12-20) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 08, 29 September 1995 (1995-09-29) -& JP 07 136471 A (TORAY IND INC), 30 May 1995 (1995-05-30) -& DATABASE WPI Section Ch, Week 199530 Derwent Publications Ltd., London, GB; Class A88, AN 1995-227559 XP002315446 & JP 07 136471 A (TORAY IND INC) 30 May 1995 (1995-05-30) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 10, 30 November 1995 (1995-11-30) -& JP 07 185268 A (TORAY IND INC), 25 July 1995 (1995-07-25) -& DATABASE WPI Section Ch, Week 199538 Derwent Publications Ltd., London, GB; Class J01, AN 1995-288175 XP002315444 & JP 07 185268 A (TORAY IND INC) 25 July 1995 (1995-07-25) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 03, 29 March 1996 (1996-03-29) & JP 07 303895 A (KUBOTA CORP), 21 November 1995 (1995-11-21) -& DATABASE WPI Section Ch, Week 199604 Derwent Publications Ltd., London, GB; Class D15, AN 1996-035403 XP002303585 & JP 07 303895 A (KUBOTA CORP) 21 November 1995 (1995-11-21) * |
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 08, 29 August 1997 (1997-08-29) & JP 09 099227 A (KURITA WATER IND LTD), 15 April 1997 (1997-04-15) -& DATABASE WPI Section Ch, Week 199725 Derwent Publications Ltd., London, GB; Class D15, AN 1997-275813 XP002303584 & JP 09 099227 A (KURITA WATER IND LTD) 15 April 1997 (1997-04-15) * |
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 09, 31 July 1998 (1998-07-31) & JP 10 085565 A (YAMADA KOGYO KK), 7 April 1998 (1998-04-07) -& DATABASE WPI Section Ch, Week 199824 Derwent Publications Ltd., London, GB; Class D15, AN 1998-265366 XP002303583 & JP 10 085565 A (YAMADA KOGYO KK) 7 April 1998 (1998-04-07) * |
See also references of WO0018498A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1115474A4 (en) | 2005-03-30 |
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