DE10209170C1 - Mechanically cleaning hollow fiber membranes comprises forming hollow fibers into bundles, vertically joining together on their opposite-lying ends, and grasping in center to set at angle - Google Patents

Mechanically cleaning hollow fiber membranes comprises forming hollow fibers into bundles, vertically joining together on their opposite-lying ends, and grasping in center to set at angle

Info

Publication number
DE10209170C1
DE10209170C1 DE2002109170 DE10209170A DE10209170C1 DE 10209170 C1 DE10209170 C1 DE 10209170C1 DE 2002109170 DE2002109170 DE 2002109170 DE 10209170 A DE10209170 A DE 10209170A DE 10209170 C1 DE10209170 C1 DE 10209170C1
Authority
DE
Grant status
Grant
Patent type
Prior art keywords
hollow fiber
characterized
fiber membranes
angle
bundles
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.)
Expired - Fee Related
Application number
DE2002109170
Other languages
German (de)
Inventor
Horst Chmiel
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.)
CHMIEL, HORST, PROF. DR.-ING., 80689 MüNCHEN, DE
Original Assignee
Horst Chmiel
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
Grant date

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D63/00Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/16Rotary, reciprocated or vibrated modules
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D65/00Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02Membrane cleaning or sterilisation ; Membrane regeneration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2321/00Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/20By influencing the flow
    • B01D2321/2033By influencing the flow dynamically
    • B01D2321/2058By influencing the flow dynamically by vibration of the membrane, e.g. with an actuator
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2321/00Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/20By influencing the flow
    • B01D2321/2066Pulsated flow

Abstract

Mechanically cleaning hollow fiber membranes (1) comprises forming the hollow fibers into bundles, vertically joining together on their opposite-lying ends, and additionally grasping in the center to set at an angle and to cyclically shake via braces (3). An Independent claim is also included for a device for mechanically removing deposits from the outer surface of hollow fiber membranes. Preferred Features: Two hollow fiber membrane bundles are arranged over each other and are grasped at their connecting site. Several hollow fiber membrane bundles are grasped in a grid-like manner and shaken.

Description

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur mechanischen Reinigung von Hohlfaser-Membranen. The present invention relates to a method and a device for mechanical cleaning of the hollow fiber membranes.

Hohlfaser-Membranen sind dünnwandige poröse Polymer-Rohre mit einem inneren ∅ von etwa 0,1 mm bis 2 mm, die von außen nach innen von Wasser durchströmt und da bei gelöste oder suspendierte Schmutzstoffe zurückhalten. Hollow fiber membranes are thin-walled porous polymeric tubes having an inner ∅ of about 0.1 mm to 2 mm, passes through from outside to inside of the water and because retain in dissolved or suspended contaminants which. Aus zahlreichen Publikatio nen ist bekannt, dass sich die äußere Oberfläche derartiger Membranen mit den zu rückgehaltenen Stoffen und insbesondere mit Mikroorganismen so belegt, dass der Wasserfluss durch die Membran, die sogenannte Permeabilität, bei vorgegebenem Dif ferenzdruck ständig abnimmt. From numerous Publikatio nen is known that the outer surface of such membranes thus assigned to be the retained substances and in particular microorganisms, that the water flow decreases continuously through the membrane, the so-called permeability, at a given pressure ferenz Dif. In zahlreichen Patent- und Offenlegungsschriften werden daher Vorschläge unterbreitet, wie diese Ablagerungen auf der Membran verhindert o der wenigstens von Zeit zu Zeit beseitigt werden können. Therefore, proposals are made in numerous patents and published patent applications, o that can be eliminated at least from time to time as this prevents deposits on the membrane.

So wird in EP 0669851 B1 eine rahmenlose (senkrechte) Anordnung von Hohlfasern beschrieben, bei denen die Ablagerungen dadurch verhindert werden sollen, dass man Gasblasen von 1 mm bis 50 mm ∅ aufsteigen lässt, die die Oberfläche der Membranen von den darauf abgelagerten Verunreinigungen befreien sollen. So in EP 0669851 B1 a frameless (vertical) arrangement of hollow fibers is described in which the deposits are to be prevented by letting ∅ rising gas bubbles of 1 mm to 50 mm, is intended to release the surface of the membranes of the deposited thereon impurities , Diese ständige großbla sige Belüftung bedeutet einen hohen Energieverbrauch und ist für anaerobe Prozesse nicht geeignet. This constant großbla sige ventilation means high energy consumption and is not suitable for anaerobic processes. Offensichtlich ist sie auch nicht effektiv genug. Obviously, it is not effective enough.

In der EP 073818 B1 wird daher zusätzlich eine diffusive Rückspülung vorgeschlagen. Therefore, in EP 073 818 B1 a diffusive backwashing is proposed in addition. Dennoch beobachtet man am Fuß der senkrecht angeordneten Hohlfaser-Membranen größere Ablagerungen. Nevertheless, it is observed larger deposits at the foot of the vertically arranged hollow fiber membranes.

Offensichtlich genügen diese Maßnahmen nicht, um Ablagerungen vollständig zu ver meiden. Obviously these measures are not sufficient to avoid deposits fully ver. Daher ist es Aufgabe der vorliegenden Erfindung, ein effektiveres Verfahren und Vorrichtung zur mechanischen Reinigung von Hohlfaser-Membranen zu schaffen. Therefore, it is object of the present invention to provide a more effective method and apparatus for the mechanical cleaning of the hollow fiber membranes.

In der vorliegenden Erfindung wird daher vorgeschlagen, die Hohlfasern gemäß Fig. 1 nicht senkrecht, sondern um einen Winkel schräg zu stellen und sie etwa in der Mitte nochmals zu fassen, bzw. zwei Hohlfaserbündel übereinander anzuordnen und sie über eine Befestigung miteinander zu verbinden, um sie zyklisch einer Schüttelbewegung auszusetzen. In the present invention, the hollow fibers 1 is therefore proposed, according to FIG. Not perpendicular but at an angle to provide an angle and to put them once again approximately in the center, or to arrange two hollow fiber bundles above one another and to connect them to each other via a fixture to cyclically exposing a shaking.

In Fig. 1 bedeuten dabei 1 die Hohlfaser-Membranen, 2 die Befestigungen der Hohlfa sern (in der Regel ein Harz, in das die Hohlfaser-Membranen eingeklebt sind) und 3 ei ne Verstrebung, mit der die Befestigung im bestimmten Zeitintervall hin und her bewegt (dh geschüttelt) werden kann. In Fig. 1 it 1 2 fastenings of Hohlfa fibers mean the hollow fiber membranes (usually a resin, in which the hollow fiber membranes are bonded) and 3 ei ne strut with which the fastening in the certain time interval and fro moves (ie shaken) can be.

Bei einer besonders vorteilhaften Ausführung dieser Vorrichtung besteht die Verstre bung aus einem Rohr oder einem Schlauch, über den in bestimmten Zeitabständen eine Rückspülung der Hohlfasern umgekehrt zur Strömungsrichtung (also von innen nach außen) erfolgen kann. In a particularly advantageous embodiment of this device is the Verstre bung from a tube or a hose, can be effected (from inside to outside so) over the backwashing of the hollow fibers reversed at certain time intervals to the flow direction. Bei dem zur Rückspülung verwendeten Fluid kann es sich z. The used for backwashing fluid can be, for. B. um Permeat, Reinigungs- oder Desinfektionslösung handeln. B. to permeate, cleaning or disinfecting solution act.

Bei richtiger Frequenz dieser Schüttelbewegung wurde überraschend eine praktisch vollständige Entfernung der Ablagerungen auf den Hohlfaser-Membranen beobachtet. With proper frequency of shaking a virtually complete removal of the deposits was observed on the hollow fiber membranes surprising. Der Effekt kann noch dadurch verstärkt werden, dass man synchron zu der Schüttelbe wegung einen einmaligen hydraulischen Impuls erzeugt. The effect can be intensified by the fact that one generated in synchronism with the shaking motion a unique hydraulic pulse. Dieser Impuls kann durch eine Pumpe oder eine große Luftblase ausgelöst werden. This pulse can be triggered by a pump or a large bubble.

Die oben genannte Schüttelbewegung kann beispielsweise durch einen Exzenterantrieb erzeugt werden. The shaking motion mentioned above can be produced for example by an eccentric drive. Vorzugsweise wird man mehrere Module gleichzeitig dieser Schüttel bewegung aussetzen. Preferably, one will suspend a plurality of modules simultaneously this shaking motion.

Fig. 2 zeigt eine derartige Anordnung in einer Draufsicht. Fig. 2 shows such an arrangement in a plan view. In einem Gitter 3 , das z. In a grid 3, z. B. aus Edelstahl oder Kunststoff - gegebenenfalls wieder als Rohre oder Schläuche ausgeführt - bestehen kann, sind die Hohlfaser-Membranen wiederum in etwa in der Mitte durch z. As stainless steel or plastic - optionally performed again as pipes or tubes - can consist, the hollow fiber membranes are again approximately in the middle of z. B. einen Kunststoffkleber fixiert. B. fixed a plastic adhesive. Das Gitter 3 wird wiederum im bestimmten Zeitintervall so hin und her bewegt, dass die Ablagerungen von den Membranoberflächen abge schüttelt werden. The grating 3 is in turn moved in predetermined time interval back and forth that the deposits are shaken abge of the membrane surfaces.

Claims (12)

  1. 1. Verfahren zur mechanischen Reinigung von Hohlfasermembranen, wobei Ablagerungen auf der Aussenoberfläche der von außen nach innen von Wasser durchströmbaren Hohlfaser-Membranen beseitigt werden, indem die Hohlfasern zyklisch einer Schüttelbewegung ausgesetzt werden, dadurch gekennzeichnet , dass 1. A method for mechanical cleaning of hollow fiber membranes, in which deposits on the outer surface of the flow-through from outside to inside of the water hollow fiber membranes are eliminated by the hollow fibers are subjected to a shaking cyclically, characterized in that
    die Hohlfasern gebündelt, the hollow fibers bundled,
    an ihren gegenüberliegenden Enden senkrecht übereinander befestigt und vertically above each secured at their opposite ends and
    zusätzlich in ihrer Mitte gefasst werden, additionally be taken in their midst,
    um sie um einen Winkel schräg zu stellen und über Verstrebungen zyklisch zu schütteln. order to make them obliquely at an angle and to shake cyclically struts.
  2. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zwei Hohlfaser- Membranbündel übereinander angeordnet und an ihrer Verbindungsstelle gefasst werden, um sie um einen Winkel schräg zu stellen und über Verstrebungen zyklisch zu schütteln. 2. The method according to claim 1, characterized in that two hollow fiber membrane bundles are superposed and passed at their junction in order to provide inclined at an angle and to shake cyclically struts.
  3. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mehrere Hohlfasermembranbündel gitterförmig gefasst werden und dieses Gitter geschüttelt wird. 3. The method of claim 1 or 2, characterized in that a plurality of hollow fiber membrane bundles are taken grid-shaped lattice and this is shaken.
  4. 4. Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass es sich bei den Verstrebungen um Rohre oder Schläuche handelt, durch die Rückspülungsflüssigkeit gepresst wird. 4. The method according to any one of the preceding claims, characterized in that it is pipe or tubing is at the struts, is pressed by the backwashing fluid.
  5. 5. Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Hohlfaser-Membranen synchron zur Schüttelbewegung impulsförmig hydraulisch angeströmt werden. 5. The method according to any one of the preceding claims, characterized in that the hollow fiber membranes are blown in synchronism with the pulse-shaped shaking hydraulically.
  6. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass zur Erzeugung des hydraulischen Impulses mittels Pressluft unterhalb der Hohlfaser-Membranen eine große Luftblase erzeugt wird. 6. The method according to claim 5, characterized in that for generating the hydraulic input means of compressed air below the hollow fiber membranes, a large air bubble is generated.
  7. 7. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass zur Erzeugung des hydraulischen Impulses eine unterhalb der Hohlfaser-Membranen angeordnete Kolben- oder Membranpumpe verwendet wird. 7. The method according to claim 5, characterized in that for generating the hydraulic pulse, a below the hollow fiber membranes disposed piston or diaphragm pump is used.
  8. 8. Vorrichtung zur mechanischen Beseitigung von Ablagerungen auf der Aussenoberfläche von außen nach innen durchströmten Hohlfaser-Membranen, dadurch gekennzeichnet, dass 8. A device for the mechanical removal of deposits on the outside surface of outside to inside flow-through hollow fiber membranes, characterized, in that
    die Hohlfasern gebündelt, the hollow fibers bundled,
    an ihren gegenüberliegenden Enden senkrecht übereinander befestigt und vertically above each secured at their opposite ends and
    zusätzlich in ihrer Mitte gefasst sind, are also taken in their midst,
    um sie um einen Winkel schräg stellen und über Verstrebungen zyklisch schütteln zu können. to set obliquely at an angle and to shake cyclically struts.
  9. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass zwei Hohlfaser- Membranbündel übereinander angeordnet und über die mittige Befestigung miteinander verbunden sind. 9. Device according to claim 8, characterized in that two hollow fiber membrane bundles are superposed and connected to each other via the central mounting.
  10. 10. Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass es sich bei den Verstrebungen um Rohre oder Schläuche handelt, durch die Rückspülungsflüssigkeit pressbar ist. 10. The apparatus of claim 8 or 9, characterized in that it is in the struts around pipes or hoses can be pressed by the backwashing fluid.
  11. 11. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass mehrere Hohlfasermembranbündel gitterförmig gefasst sind. 11. The device according to one of claims 8 to 10, characterized in that a plurality of hollow fiber membrane bundles are taken lattice shape.
  12. 12. Vorrichtung nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass zur Erzeugung eines hydraulischen Impulses unterhalb der Hohlfaser-Membranen eine Kolben- oder Membranpumpe angeordnet ist. 12. Device according to one of claims 8 to 11, characterized in that a piston or diaphragm pump is arranged for generating a hydraulic pulse below the hollow fiber membranes.
DE2002109170 2002-03-01 2002-03-01 Mechanically cleaning hollow fiber membranes comprises forming hollow fibers into bundles, vertically joining together on their opposite-lying ends, and grasping in center to set at angle Expired - Fee Related DE10209170C1 (en)

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DE2002109170 DE10209170C1 (en) 2002-03-01 2002-03-01 Mechanically cleaning hollow fiber membranes comprises forming hollow fibers into bundles, vertically joining together on their opposite-lying ends, and grasping in center to set at angle

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006074519A1 (en) 2005-01-14 2006-07-20 Siemens Water Technologies Corp. Filtration system
EP1701778A1 (en) * 2003-10-07 2006-09-20 Phase Inc. Cleaning hollow core membrane fibers using vibration
US8182687B2 (en) 2002-06-18 2012-05-22 Siemens Industry, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
US8268176B2 (en) 2003-08-29 2012-09-18 Siemens Industry, Inc. Backwash
US8287743B2 (en) 2007-05-29 2012-10-16 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8318028B2 (en) 2007-04-02 2012-11-27 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
US8382981B2 (en) 2008-07-24 2013-02-26 Siemens Industry, Inc. Frame system for membrane filtration modules
US8496828B2 (en) 2004-12-24 2013-07-30 Siemens Industry, Inc. Cleaning in membrane filtration systems
US8506806B2 (en) 2004-09-14 2013-08-13 Siemens Industry, Inc. Methods and apparatus for removing solids from a membrane module
US8512568B2 (en) 2001-08-09 2013-08-20 Siemens Industry, Inc. Method of cleaning membrane modules
US8518256B2 (en) 2001-04-04 2013-08-27 Siemens Industry, Inc. Membrane module
US8758622B2 (en) 2004-12-24 2014-06-24 Evoqua Water Technologies Llc Simple gas scouring method and apparatus
US8758621B2 (en) 2004-03-26 2014-06-24 Evoqua Water Technologies Llc Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
US8790515B2 (en) 2004-09-07 2014-07-29 Evoqua Water Technologies Llc Reduction of backwash liquid waste
US8808540B2 (en) 2003-11-14 2014-08-19 Evoqua Water Technologies Llc Module cleaning method
US8858796B2 (en) 2005-08-22 2014-10-14 Evoqua Water Technologies Llc Assembly for water filtration using a tube manifold to minimise backwash
US8956464B2 (en) 2009-06-11 2015-02-17 Evoqua Water Technologies Llc Method of cleaning membranes
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9675938B2 (en) 2005-04-29 2017-06-13 Evoqua Water Technologies Llc Chemical clean for membrane filter
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods

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EP0388546A1 (en) * 1989-03-10 1990-09-26 Joseph Bradley Culkin Device and method for filtering a colloidal suspension
US5997743A (en) * 1995-07-03 1999-12-07 Ahn; Kyu-Hong Water treatment method using hollow fiber membrane and apparatus therefor

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US27951A (en) * 1860-04-17 Improvement in windmills
EP0388546A1 (en) * 1989-03-10 1990-09-26 Joseph Bradley Culkin Device and method for filtering a colloidal suspension
US5997743A (en) * 1995-07-03 1999-12-07 Ahn; Kyu-Hong Water treatment method using hollow fiber membrane and apparatus therefor

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8518256B2 (en) 2001-04-04 2013-08-27 Siemens Industry, Inc. Membrane module
US8512568B2 (en) 2001-08-09 2013-08-20 Siemens Industry, Inc. Method of cleaning membrane modules
US8182687B2 (en) 2002-06-18 2012-05-22 Siemens Industry, Inc. Methods of minimising the effect of integrity loss in hollow fibre membrane modules
US8268176B2 (en) 2003-08-29 2012-09-18 Siemens Industry, Inc. Backwash
EP1701778A1 (en) * 2003-10-07 2006-09-20 Phase Inc. Cleaning hollow core membrane fibers using vibration
EP1701778A4 (en) * 2003-10-07 2008-10-01 Phase Inc Cleaning hollow core membrane fibers using vibration
US8808540B2 (en) 2003-11-14 2014-08-19 Evoqua Water Technologies Llc Module cleaning method
US8758621B2 (en) 2004-03-26 2014-06-24 Evoqua Water Technologies Llc Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
US8790515B2 (en) 2004-09-07 2014-07-29 Evoqua Water Technologies Llc Reduction of backwash liquid waste
US8506806B2 (en) 2004-09-14 2013-08-13 Siemens Industry, Inc. Methods and apparatus for removing solids from a membrane module
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
US8496828B2 (en) 2004-12-24 2013-07-30 Siemens Industry, Inc. Cleaning in membrane filtration systems
US8758622B2 (en) 2004-12-24 2014-06-24 Evoqua Water Technologies Llc Simple gas scouring method and apparatus
EP1850950A1 (en) * 2005-01-14 2007-11-07 Siemens Water Technologies Corp. Filtration system
EP1850950A4 (en) * 2005-01-14 2009-09-02 Siemens Water Tech Corp Filtration system
WO2006074519A1 (en) 2005-01-14 2006-07-20 Siemens Water Technologies Corp. Filtration system
US9675938B2 (en) 2005-04-29 2017-06-13 Evoqua Water Technologies Llc Chemical clean for membrane filter
US8858796B2 (en) 2005-08-22 2014-10-14 Evoqua Water Technologies Llc Assembly for water filtration using a tube manifold to minimise backwash
US8894858B1 (en) 2005-08-22 2014-11-25 Evoqua Water Technologies Llc Method and assembly for water filtration using a tube manifold to minimize backwash
US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8318028B2 (en) 2007-04-02 2012-11-27 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8623202B2 (en) 2007-04-02 2014-01-07 Siemens Water Technologies Llc Infiltration/inflow control for membrane bioreactor
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US9573824B2 (en) 2007-05-29 2017-02-21 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US8287743B2 (en) 2007-05-29 2012-10-16 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US8840783B2 (en) 2007-05-29 2014-09-23 Evoqua Water Technologies Llc Water treatment membrane cleaning with pulsed airlift pump
US8622222B2 (en) 2007-05-29 2014-01-07 Siemens Water Technologies Llc Membrane cleaning with pulsed airlift pump
US8372276B2 (en) 2007-05-29 2013-02-12 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US9206057B2 (en) 2007-05-29 2015-12-08 Evoqua Water Technologies Llc Membrane cleaning with pulsed airlift pump
US9023206B2 (en) 2008-07-24 2015-05-05 Evoqua Water Technologies Llc Frame system for membrane filtration modules
US8382981B2 (en) 2008-07-24 2013-02-26 Siemens Industry, Inc. Frame system for membrane filtration modules
US8956464B2 (en) 2009-06-11 2015-02-17 Evoqua Water Technologies Llc Method of cleaning membranes
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9630147B2 (en) 2010-09-24 2017-04-25 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes

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