WO2000018498A1 - Apparatus and method for cleaning membrane filtration modules - Google Patents

Apparatus and method for cleaning membrane filtration modules Download PDF

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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
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
Application number
PCT/AU1999/000817
Other languages
English (en)
French (fr)
Inventor
Fufang Zha
Edward John Jordan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Filter Wastewater Group Inc
Pall Filtration and Separations Group Inc
Original Assignee
USF Filtration and Separations Group Inc
US Filter Wastewater Group Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AUPP6217A external-priority patent/AUPP621798A0/en
Priority claimed from AUPP6218A external-priority patent/AUPP621898A0/en
Priority claimed from AUPQ1112A external-priority patent/AUPQ111299A0/en
Application filed by USF Filtration and Separations Group Inc, US Filter Wastewater Group Inc filed Critical USF Filtration and Separations Group Inc
Priority to JP2000572010A priority Critical patent/JP5038555B2/ja
Priority to NZ510394A priority patent/NZ510394A/en
Priority to CA002342346A priority patent/CA2342346C/en
Priority to AU61834/99A priority patent/AU752765B2/en
Priority to EP99948614A priority patent/EP1115474A4/en
Priority to KR1020077003509A priority patent/KR100832673B1/ko
Publication of WO2000018498A1 publication Critical patent/WO2000018498A1/en
Priority to US09/815,966 priority patent/US6524481B2/en
Anticipated expiration legal-status Critical
Priority to US10/303,447 priority patent/US6641733B2/en
Priority to US10/428,601 priority patent/US6821420B2/en
Priority to US10/822,036 priority patent/US6841070B2/en
Priority to US11/025,418 priority patent/US20050109692A1/en
Ceased legal-status Critical Current

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
    • 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

Landscapes

  • 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)
PCT/AU1999/000817 1997-09-25 1999-09-24 Apparatus and method for cleaning membrane filtration modules Ceased WO2000018498A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
JP2000572010A JP5038555B2 (ja) 1998-09-25 1999-09-24 濾過膜モジュールの洗浄装置及び洗浄方法
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
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
EP99948614A EP1115474A4 (en) 1998-09-25 1999-09-24 DEVICE AND METHOD FOR CLEANING MEMBRANE FILTER MODULES
KR1020077003509A KR100832673B1 (ko) 1998-09-25 1999-09-24 여과 시스템, 박막 세척 방법 및 박막 모듈
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
AUPP6218A AUPP621898A0 (en) 1998-09-25 1998-09-25 Apparatus and method for cleaning membrane filtration modules
AUPP6217A AUPP621798A0 (en) 1998-09-25 1998-09-25 Membrane bioreactor
AUPP6218 1998-09-25
AUPP6217 1998-09-25
AUPQ1112 1999-06-21
AUPQ1112A AUPQ111299A0 (en) 1999-06-21 1999-06-21 Improved membrane bioreactor

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 Ceased WO2000018498A1 (en) 1997-09-25 1999-09-24 Apparatus and method for cleaning membrane filtration modules

Country Status (11)

Country Link
US (1) US6524481B2 (enExample)
JP (1) JP5038555B2 (enExample)
KR (2) KR100704328B1 (enExample)
CN (1) CN1147349C (enExample)
AU (1) AU752765B2 (enExample)
CA (1) CA2342346C (enExample)
MX (2) MX236005B (enExample)
MY (1) MY121098A (enExample)
NZ (1) NZ510394A (enExample)
TW (1) TWI222895B (enExample)
WO (1) WO2000018498A1 (enExample)

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US6841083B2 (en) 2002-06-27 2005-01-11 Ethicon, Inc. Device and process for improved scouring efficiency
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US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
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