ATE253973T1 - Reinigung von hohlfasermembranen - Google Patents

Reinigung von hohlfasermembranen

Info

Publication number
ATE253973T1
ATE253973T1 AT95931088T AT95931088T ATE253973T1 AT E253973 T1 ATE253973 T1 AT E253973T1 AT 95931088 T AT95931088 T AT 95931088T AT 95931088 T AT95931088 T AT 95931088T AT E253973 T1 ATE253973 T1 AT E253973T1
Authority
AT
Austria
Prior art keywords
cycle
fibers
shell
pct
lumens
Prior art date
Application number
AT95931088T
Other languages
English (en)
Inventor
Thomas William Beck
Humphrey John Jardine Drummond
Matthew Brian Lee
Clint Virgil Kopp
Warren Thomas Johnson
Original Assignee
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
Application filed by Us Filter Wastewater Group Inc filed Critical Us Filter Wastewater Group Inc
Application granted granted Critical
Publication of ATE253973T1 publication Critical patent/ATE253973T1/de

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B01D29/115—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/20—Accessories; Auxiliary operations
    • 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
    • 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
    • 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
    • B01D2321/20—By influencing the flow
    • B01D2321/2066—Pulsated flow

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
  • External Artificial Organs (AREA)
AT95931088T 1994-09-09 1995-09-08 Reinigung von hohlfasermembranen ATE253973T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPM8006A AUPM800694A0 (en) 1994-09-09 1994-09-09 Cleaning of hollow fibre membranes
PCT/AU1995/000587 WO1996007470A1 (en) 1994-09-09 1995-09-08 Cleaning of hollow fibre membranes

Publications (1)

Publication Number Publication Date
ATE253973T1 true ATE253973T1 (de) 2003-11-15

Family

ID=3782526

Family Applications (1)

Application Number Title Priority Date Filing Date
AT95931088T ATE253973T1 (de) 1994-09-09 1995-09-08 Reinigung von hohlfasermembranen

Country Status (11)

Country Link
US (1) US6159373A (de)
EP (1) EP0779835B1 (de)
JP (1) JP3704544B2 (de)
KR (1) KR100385044B1 (de)
CN (1) CN1071588C (de)
AT (1) ATE253973T1 (de)
AU (2) AUPM800694A0 (de)
CA (1) CA2199356C (de)
DE (1) DE69532129T2 (de)
ES (1) ES2207654T3 (de)
WO (1) WO1996007470A1 (de)

Families Citing this family (81)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5639373A (en) 1995-08-11 1997-06-17 Zenon Environmental Inc. Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate
US7087173B2 (en) 1995-08-11 2006-08-08 Zenon Environmental Inc. Inverted cavity aerator for membrane module
US20040238432A1 (en) 1995-08-11 2004-12-02 Mailvaganam Mahendran Membrane filtration module with adjustable header spacing
US8852438B2 (en) 1995-08-11 2014-10-07 Zenon Technology Partnership Membrane filtration module with adjustable header spacing
KR20050046718A (ko) 1995-08-11 2005-05-18 제논 인바이런멘탈 인코포레이티드 수직한 중공사 멤브레인 다발 및 섬유 표면을 깨끗하게유지시키는 방법
US6077435A (en) * 1996-03-15 2000-06-20 Usf Filtration And Separations Group Inc. Filtration monitoring and control system
GB9621339D0 (en) * 1996-10-12 1996-12-04 United Utilities Plc Filter
AUPO377796A0 (en) * 1996-11-21 1996-12-19 Memtec America Corporation Microporous membrane filtration and backwashing process
AU721064B2 (en) * 1996-12-20 2000-06-22 Evoqua Water Technologies Llc Scouring method
US6641733B2 (en) 1998-09-25 2003-11-04 U. S. Filter Wastewater Group, Inc. Apparatus and method for cleaning membrane filtration modules
TWI222895B (en) 1998-09-25 2004-11-01 Usf Filtration & Separations Apparatus and method for cleaning membrane filtration modules
US6156200A (en) * 1998-12-08 2000-12-05 Usf Filtration & Separations Group, Inc. Gas-scrubbed hollow fiber membrane module
AUPP985099A0 (en) 1999-04-20 1999-05-13 Usf Filtration And Separations Group Inc. Membrane filtration manifold system
AUPQ680100A0 (en) 2000-04-10 2000-05-11 Usf Filtration And Separations Group Inc. Hollow fibre restraining system
AUPR064800A0 (en) 2000-10-09 2000-11-02 Usf Filtration And Separations Group Inc. Improved membrane filtration system
AUPR143400A0 (en) 2000-11-13 2000-12-07 Usf Filtration And Separations Group Inc. Modified membranes
AUPR421501A0 (en) 2001-04-04 2001-05-03 U.S. Filter Wastewater Group, Inc. Potting method
AUPR584301A0 (en) 2001-06-20 2001-07-12 U.S. Filter Wastewater Group, Inc. Membrane polymer compositions
AUPR692401A0 (en) 2001-08-09 2001-08-30 U.S. Filter Wastewater Group, Inc. Method of cleaning membrane modules
AUPR774201A0 (en) * 2001-09-18 2001-10-11 U.S. Filter Wastewater Group, Inc. High solids module
DE60213184T2 (de) 2001-11-16 2007-06-28 U.S. Filter Wastewater Group, Inc. Methode zur Reinigung von Membranen
AU2002357338A1 (en) * 2002-01-09 2003-07-30 Hydranautics Methods for improving filtration performance of hollow fiber membranes
US7247238B2 (en) 2002-02-12 2007-07-24 Siemens Water Technologies Corp. Poly(ethylene chlorotrifluoroethylene) membranes
AUPS300602A0 (en) 2002-06-18 2002-07-11 U.S. Filter Wastewater Group, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
US7938966B2 (en) 2002-10-10 2011-05-10 Siemens Water Technologies Corp. Backwash method
AU2002953111A0 (en) 2002-12-05 2002-12-19 U. S. Filter Wastewater Group, Inc. Mixing chamber
WO2004056458A2 (en) 2002-12-19 2004-07-08 Hydranautics Methods for cleaning and maintaining membrane surface during filtration
DE602004013731D1 (de) * 2003-03-05 2008-06-26 Hydranautics Tauchbares membranmodul mit austauschbaren membranelementen
AU2003903507A0 (en) 2003-07-08 2003-07-24 U. S. Filter Wastewater Group, Inc. Membrane post-treatment
AU2004267874B2 (en) * 2003-08-29 2009-03-12 Evoqua Water Technologies Llc Backwash
US8268176B2 (en) 2003-08-29 2012-09-18 Siemens Industry, Inc. Backwash
NZ544864A (en) * 2003-09-22 2010-02-26 Siemens Water Tech Corp Backwash and cleaning method for concentrating the solids of a liquid suspension by providing a pressure differential across membrane walls
AU2004289373B2 (en) 2003-11-14 2010-07-29 Evoqua Water Technologies Llc Improved module cleaning method
WO2005092799A1 (en) 2004-03-26 2005-10-06 U.S. Filter Wastewater Group, Inc. Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
AU2005240524C1 (en) 2004-04-22 2009-12-24 Evoqua Water Technologies Llc Filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials
US7819956B2 (en) 2004-07-02 2010-10-26 Siemens Water Technologies Corp. Gas transfer membrane
EP1773477B1 (de) 2004-07-05 2011-09-07 Siemens Water Technologies Corp. Hydrophile membranen
JP4958779B2 (ja) 2004-08-20 2012-06-20 シーメンス・ウォーター・テクノロジーズ・コーポレイション 正方形のｍｂｒマニホールド・システム
WO2006026814A1 (en) 2004-09-07 2006-03-16 Siemens Water Technologies Corp. Reduction of backwash liquid waste
JP4896025B2 (ja) 2004-09-14 2012-03-14 シーメンス・ウォーター・テクノロジーズ・コーポレイション 膜モジュールから固形分を除去するための方法および装置
JP4954880B2 (ja) 2004-09-15 2012-06-20 シーメンス・ウォーター・テクノロジーズ・コーポレーション 連続的に変化する通気
JP4678757B2 (ja) * 2004-09-22 2011-04-27 オルガノ株式会社 水処理装置およびその運転方法
US7591950B2 (en) 2004-11-02 2009-09-22 Siemens Water Technologies Corp. Submerged cross-flow filtration
EP1827664B1 (de) 2004-12-03 2011-06-08 Siemens Industry, Inc. Membrannachbehandlung
EP1838422A4 (de) 2004-12-24 2009-09-02 Siemens Water Tech Corp Einfaches gasspülverfahren und entsprechende vorrichtung
WO2006066319A1 (en) 2004-12-24 2006-06-29 Siemens Water Technologies Corp. Cleaning in membrane filtration systems
US20060266705A1 (en) * 2005-04-22 2006-11-30 Arnold Janson Refreshing chemicals during membrane cleaning
CN101184548B (zh) 2005-04-29 2011-10-05 西门子水技术公司 用于膜滤器的化学清洗剂
KR20080031956A (ko) 2005-07-14 2008-04-11 지멘스 워터 테크놀로지스 코포레이션 막의 모노퍼술페이트 처리 방법
JP2009504399A (ja) 2005-08-22 2009-02-05 シーメンス・ウォーター・テクノロジーズ・コーポレーション 管状マニホールドを使用して逆洗を最小化する水濾過のためのアセンブリ
WO2007044415A2 (en) 2005-10-05 2007-04-19 Siemens Water Technologies Corp. Method and apparatus for treating wastewater
WO2007044345A2 (en) 2005-10-05 2007-04-19 Siemens Water Technologies Corp. Method and apparatus for treating wastewater
US7455765B2 (en) 2006-01-25 2008-11-25 Siemens Water Technologies Corp. Wastewater treatment system and method
US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
WO2008110165A1 (en) * 2007-03-09 2008-09-18 Vestergaard Sa Microporous filter with a halogen source
WO2008123972A1 (en) 2007-04-02 2008-10-16 Siemens Water Technologies Corp. Improved infiltration/inflow control for membrane bioreactor
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
AU2008263139B2 (en) 2007-05-29 2011-08-25 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
CN101284213B (zh) * 2008-05-30 2011-08-03 北京汉青天朗水处理科技有限公司 一种清洗膜分离设备的方法及装置
JP2013500144A (ja) 2008-07-24 2013-01-07 シーメンス インダストリー インコーポレイテッド 濾過システムにおける濾過膜モジュールアレイに対して構造的支持を施すための方法および濾過システム
NZ591259A (en) 2008-08-20 2013-02-22 Siemens Industry Inc A hollow membrane filter backwash system using gas pressurised at at least two pressures feed from the down stream side to push water through the filter to clean it
AU2010101488B4 (en) 2009-06-11 2013-05-02 Evoqua Water Technologies Llc Methods for cleaning a porous polymeric membrane and a kit for cleaning a porous polymeric membrane
JP5249973B2 (ja) * 2010-02-25 2013-07-31 圭祐 松崎 腹水処理システムおよびその洗浄方法
ES2738898T3 (es) 2010-04-30 2020-01-27 Evoqua Water Tech Llc Dispositivo de distribución de flujo de fluido
AU2011305377B2 (en) 2010-09-24 2014-11-20 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
CN102295323B (zh) * 2011-06-16 2013-06-05 天津工业大学 一种水处理方法
EP2755744A4 (de) * 2011-09-16 2015-06-17 Gen Electric Verfahren zur verbesserung der leistung einer membran zur verwendung in der membrandestillation
CN103958034B (zh) 2011-09-30 2017-03-22 伊沃夸水处理技术有限责任公司 隔离阀
CA2850309C (en) 2011-09-30 2020-01-07 Evoqua Water Technologies Llc Improved manifold arrangement
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
KR20150054918A (ko) 2012-09-14 2015-05-20 에보쿠아 워터 테크놀로지스 엘엘씨 막을 위한 중합체 블렌드
AU2013231145B2 (en) 2012-09-26 2017-08-17 Evoqua Water Technologies Llc Membrane potting methods
EP2900356A1 (de) 2012-09-27 2015-08-05 Evoqua Water Technologies LLC Gaswäscher für tauchmembranen
US9550152B2 (en) 2013-03-07 2017-01-24 Pentair Residential Filtration, Llc Point of use filtration system with backwash
EP3052221B1 (de) 2013-10-02 2022-12-14 Rohm & Haas Electronic Materials Singapore Pte. Ltd Vorrichtung zur reparatur eines membranfiltrationsmoduls
WO2017011068A1 (en) 2015-07-14 2017-01-19 Evoqua Water Technologies Llc Aeration device for filtration system
GB201612680D0 (en) * 2016-07-21 2016-09-07 Bp Exploration Operating Method of filtering water
WO2019063737A1 (en) * 2017-09-27 2019-04-04 Philip Morris Products S.A. SUPPORT ELEMENT FOR AEROSOL GENERATING ARTICLE
FR3083458B1 (fr) 2018-07-06 2022-08-26 Arkema France Fibres polymeres creuses en tant que membranes de filtration
KR102918884B1 (ko) * 2020-02-05 2026-01-27 도쿄엘렉트론가부시키가이샤 필터 세정 시스템 및 필터 세정 방법
CN114749024A (zh) * 2022-04-19 2022-07-15 江苏圣洁达水处理工程有限公司 智能云平台新型超滤水处理系统及水处理方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4650586A (en) * 1983-09-26 1987-03-17 Kinetico, Inc. Fluid treatment system
AU563321B2 (en) * 1983-09-30 1987-07-02 U.S. Filter Wastewater Group, Inc. Cleaning of filters
WO1985001449A1 (en) * 1983-09-30 1985-04-11 Memtec Limited Cleaning of filters
AU576424B2 (en) * 1985-03-05 1988-08-25 U.S. Filter Wastewater Group, Inc. Concentration of solids in a suspension
ATE81796T1 (de) * 1985-03-05 1992-11-15 Memtec Ltd Konzentrierung von feststoffen in einer suspension.
EP0216876B1 (de) * 1985-03-28 1990-05-16 Memtec Limited Kühlung von hohlfaser-kreuzstrom-separatoren
ES2014516A6 (es) * 1986-07-11 1990-07-16 Mentec Ltd Procedimiento para la limpieza de filtros.
JPH01501046A (ja) * 1986-09-04 1989-04-13 メムテック・リミテッド 中空繊維フィルターの洗浄方法
US4784771A (en) * 1987-08-03 1988-11-15 Environmental Water Technology, Inc. Method and apparatus for purifying fluids
JP2904564B2 (ja) * 1990-08-31 1999-06-14 オルガノ株式会社 中空糸膜を用いる濾過塔のスクラビング方法
DE69230766T2 (de) * 1991-08-07 2000-08-31 Usf Filtration Ltd., South Windsor Konzentration von feststoffen in einer aufschlammung unter anwendung von kohlfasermembranen

Also Published As

Publication number Publication date
KR970705431A (ko) 1997-10-09
CA2199356A1 (en) 1996-03-14
US6159373A (en) 2000-12-12
KR100385044B1 (ko) 2003-08-19
JPH10504996A (ja) 1998-05-19
CN1159769A (zh) 1997-09-17
JP3704544B2 (ja) 2005-10-12
AU3466195A (en) 1996-03-27
DE69532129T2 (de) 2004-04-15
AUPM800694A0 (en) 1994-10-06
CA2199356C (en) 2006-11-07
EP0779835A1 (de) 1997-06-25
EP0779835B1 (de) 2003-11-12
DE69532129D1 (de) 2003-12-18
WO1996007470A1 (en) 1996-03-14
AU686879B2 (en) 1998-02-12
CN1071588C (zh) 2001-09-26
EP0779835A4 (de) 1998-12-02
ES2207654T3 (es) 2004-06-01

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