WO2006029456A1 - Methods and apparatus for removing solids from a membrane module - Google Patents
Methods and apparatus for removing solids from a membrane module Download PDFInfo
- Publication number
- WO2006029456A1 WO2006029456A1 PCT/AU2005/001396 AU2005001396W WO2006029456A1 WO 2006029456 A1 WO2006029456 A1 WO 2006029456A1 AU 2005001396 W AU2005001396 W AU 2005001396W WO 2006029456 A1 WO2006029456 A1 WO 2006029456A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- membrane
- membranes
- openings
- feed
- wall
- Prior art date
Links
Classifications
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- 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
- 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
-
- 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
- B01D61/18—Apparatus therefor
-
- 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
- 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
- B01D63/04—Hollow fibre modules comprising multiple hollow fibre assemblies
- B01D63/043—Hollow fibre modules comprising multiple hollow fibre assemblies with separate tube sheets
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/10—Specific supply elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/12—Specific discharge elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/06—Submerged-type; Immersion type
-
- 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
- B01D2321/02—Forward flushing
-
- 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
Definitions
- the present invention relates to membrane filtration systems and, more particularly, to a method and apparatus for improving the filtration efficiency of such systems by providing an improved cleaning system for the membranes.
- a commonly used method to physically clean membranes is a backwash (also called “backflush” or “backpulse”) with the permeate/filtrate or a gas.
- the backwash method is typically used to eject solids blocking the membrane pores and partly dislodge the cake that may have formed on the membrane surface.
- the fouling occurs more quickly and more severely, in particular, where membranes are densely packed in a module.
- Backwash with pressurized gas has proved a very efficient cleaning method and is now widely used in the field of microfiltration processes.
- the limitation to this method is the membrane pore size.
- Backwash of membranes with permeate has no limitations to the pore size, but the backwash efficiency is generally lower than gas backwash and the transmembrane pressure (TMP) recovery is not enough to offset the fouling rate.
- Further means are employed to enhance the backwash efficiency, such as dosing chemicals to the backwash permeate, or in combination with gas scrubbing.
- Maruyama et al in Japanese Patent No. JP2031200 discloses a hollow fibre membrane backwashing method.
- the method involves the following sequence: stop filtration, air-scour membrane, fill the membrane vessel, backwash with permeate under pressurized air and drain the waste. This procedure is repeated to achieve a higher efficiency.
- Sunaoka et al in a United States Patent No. 5,209,852 describes a process for scrubbing hollow fibre membranes in modules. This process is composed of a two-stage air scrubbing and draining to clean the membranes.
- membrane modules are typically manufactured with a high packing density of membranes, usually in the form of fibres. This increases the amount of membrane area for filtration within a module.
- the higher the packing density the more difficult it is to effectively flush solids captured during the filtration process from the membrane bundle. Therefore, improvement in the efficiency of solids removal during backwash allows either higher solids levels to be processed, or higher membrane packing densities to be used, reducing the cost of treatment.
- the present invention seeks to overcome or at least ameliorate one or more of the disadvantages of the prior art or at least provide a useful alternative.
- the present invention provides a method of operating a membrane filtration module, said module including one or more membranes extending longitudinally between vertically spaced upper and lower headers into which the ends of the membranes are potted, the membranes having a permeable wall which is subjected to a filtration operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall, at least one of said upper and/or lower headers having one or more openings therein, the method including flowing said feed, at least in part, through said one or more openings for application to said membrane wall.
- the present invention provides a method of cleaning a membrane filtration module, said module including one or more membranes located in a feed-containing vessel and extending longitudinally between vertically spaced upper and lower headers into which the ends of the membranes are potted, the membranes having a permeable wall which is subjected to a filtration operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall, at least one of said upper and/or lower headers having one or more openings therein, the method including: a) performing a filtration operation wherein said feed, at least in part, is flowed through said one or more openings for application to said membrane wall; - A -
- the openings are provided in the lower header and filtrate is withdrawn from the upper header.
- the openings may also be used to introduce gas into the module to produce bubbles for scouring the surface of the membranes during said cleaning process.
- the sweep may be performed concurrently with the cleaning process.
- the sweep is a high velocity sweep.
- the present invention provides for holes or openings in one of the module pots so that during filtration at least part of the feed liquid will also be drawn in through the openings in the bottom pot and flow into the depths of the membrane bundle, reducing shell side pressure drop and generating some crossflow over the membrane surface.
- the present invention provides a method of operating a membrane filtration module, said module including one or more membranes extending vertically from an upper header into which proximal ends of the membranes are potted, the membranes having a permeable wall which is subjected to a filtration operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall, the method including during said filtration operation flowing said feed, at least in part, through one or more openings in the module below said membranes for application to said membrane wall.
- the present provides a method of cleaning a membrane filtration module, said module including one or more membranes located in a feed-containing vessel and extending vertically from an upper header into which proximal ends of the membranes are potted, the membranes having a permeable wall which is subjected to a filtration operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall, the method including: a) performing a filtration operation wherein said feed, at least in part, is flowed through one or more openings in the module below said membranes for application to said membrane wall; b) suspending the filtration operation; c) performing a cleaning process on the membrane wall to dislodge contaminant matter therefrom into liquid surrounding the membrane; d) performing a sweep or drain-down of the feed-containing vessel substantially parallel to the vertically extending membranes to remove the liquid containing the dislodged contaminant matter, at least in part, through said
- Figure 1 shows a schematic sectional view of a membrane module according to one embodiment
- Figure 2 shows a schematic sectional view of a membrane module according to further embodiment
- Figures 3a and 3b show an enlarged schematic sectional view of the lower header of a non-pressurized filtration system during the aeration and drain-down phases, respectively.
- the filtration module 5 is mounted within a housing vessel 6 which contains the feed to be filtered.
- the filtration module 5 contains a bundle or bundles of hollow fibre membranes 7 extending between upper and lower headers 8 and 9, respectively.
- the lower header 9 is provided with a number of openings 10 communicating with the interior of the fibre bundle and an open-ended plenum chamber 11 having an opening 11'.
- An inlet/outlet port 12 is provided at the base of the module 5.
- Feed is supplied through ports 12, 13 and 14 under the control of valves AV5, AV1 and AV2.
- Permeate/filtrate is withdrawn through chamber 15 and port 16 under control of valve AV3.
- a backwash may also be applied through port 16 under the control of valve AV4.
- Figure 2 shows a similar arrangement to Figure 1 , however, in this embodiment the hollow fibre membranes 7 are suspended vertically from the upper header 8 and are not potted at their lower distal ends 19. The distal ends 19 of each fibre membrane 7 are closed and filtrate withdrawn through the upper header 8.
- FIGs 3a and 3b show an enlarged view of the lower headers 9 of a pair of modules 5 connected to a single plenum chamber 11 in a non-pressurized filtration system.
- the modules 5 in this embodiment are mounted in an open vessel (not shown) and the waste liquid containing solids accumulated within the modules 5 following filtration and backwash is drained through the openings 10 under force of gravity, as shown in Figure 3b.
- port 17 connected to a gas supply manifold 18 may also be used to supply gas to openings 10 to provide scouring bubbles within the module 5 to assist cleaning of the fibre membrane surfaces.
- Systems embodying the invention may provide a number of benefits including:
- feed liquid can be drawn into the centre of the bundle through the same holes during filtration). This also induces a form of crossflow during filtration.
- Rack inserts containing sets of membrane modules can be lowered down closer to the bottom of the module as an open area is no longer required beneath the modules to accommodate manifolds and piping used for solids removal and feed inlet, this now takes place through the openings in the pot. The result is better void space reduction efficiency as well as less space for drainage.
- the plenum chambers can be connected to a pipe or manifold and the backwash waste pumped out of the module rather then gravity flowed, and/or the feedwater pumped in during filtration. It will be appreciated that further embodiments and exemplifications of the invention are possible with departing from the spirit or scope of the invention described.
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007530550A JP4896025B2 (en) | 2004-09-14 | 2005-09-13 | Method and apparatus for removing solids from membrane modules |
CN200580034570.1A CN101039739B (en) | 2004-09-14 | 2005-09-13 | Methods and apparatus for removing solids from a membrane module |
US11/575,234 US8506806B2 (en) | 2004-09-14 | 2005-09-13 | Methods and apparatus for removing solids from a membrane module |
NZ553742A NZ553742A (en) | 2004-09-14 | 2005-09-13 | Methods and apparatus for removing solids from a membrane module |
EP05779037.0A EP1799334B1 (en) | 2004-09-14 | 2005-09-13 | Methods and apparatus for removing solids from a membrane module |
AU2005284677A AU2005284677B2 (en) | 2004-09-14 | 2005-09-13 | Methods and apparatus for removing solids from a membrane module |
CA002579857A CA2579857A1 (en) | 2004-09-14 | 2005-09-13 | Membrane filtration module and cleaning process |
US13/943,411 US20130299411A1 (en) | 2004-09-14 | 2013-07-16 | Methods and apparatus for removing solids from a membrane module |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2004905292A AU2004905292A0 (en) | 2004-09-14 | Methods and apparatus for removing solids from a membrane module | |
AU2004905292 | 2004-09-14 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/943,411 Division US20130299411A1 (en) | 2004-09-14 | 2013-07-16 | Methods and apparatus for removing solids from a membrane module |
Publications (1)
Publication Number | Publication Date |
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WO2006029456A1 true WO2006029456A1 (en) | 2006-03-23 |
Family
ID=36059629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2005/001396 WO2006029456A1 (en) | 2004-09-14 | 2005-09-13 | Methods and apparatus for removing solids from a membrane module |
Country Status (8)
Country | Link |
---|---|
US (2) | US8506806B2 (en) |
EP (1) | EP1799334B1 (en) |
JP (1) | JP4896025B2 (en) |
CN (1) | CN101039739B (en) |
AU (1) | AU2005284677B2 (en) |
CA (1) | CA2579857A1 (en) |
NZ (1) | NZ553742A (en) |
WO (1) | WO2006029456A1 (en) |
Cited By (36)
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EP1897602A1 (en) * | 2005-06-30 | 2008-03-12 | Ngk Insulators, Ltd. | Filtration device |
WO2008098309A1 (en) * | 2007-02-16 | 2008-08-21 | Siemens Water Technologies Corp. | Membrane filtration process and design |
JP2009241058A (en) * | 2008-03-14 | 2009-10-22 | Toyo Eng Corp | Method of treating waste water and waste water treatment apparatus |
US7938966B2 (en) | 2002-10-10 | 2011-05-10 | Siemens Water Technologies Corp. | Backwash method |
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 |
WO2013089796A1 (en) * | 2011-12-16 | 2013-06-20 | Shell Oil Company | System and process for the conversion of biomass |
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 |
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 |
US8758622B2 (en) | 2004-12-24 | 2014-06-24 | Evoqua Water Technologies Llc | Simple gas scouring method and apparatus |
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 |
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US9533261B2 (en) | 2012-06-28 | 2017-01-03 | Evoqua Water Technologies Llc | Potting method |
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US9675938B2 (en) | 2005-04-29 | 2017-06-13 | Evoqua Water Technologies Llc | Chemical clean for membrane filter |
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 |
US10220374B2 (en) | 2013-04-24 | 2019-03-05 | Shell Oil Company | Activation of a self-activating hydroprocessing catalyst with steam |
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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 |
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Also Published As
Publication number | Publication date |
---|---|
CN101039739B (en) | 2014-10-08 |
AU2005284677A1 (en) | 2006-03-23 |
US20080053923A1 (en) | 2008-03-06 |
CN101039739A (en) | 2007-09-19 |
AU2005284677B2 (en) | 2010-12-23 |
JP2008513187A (en) | 2008-05-01 |
NZ553742A (en) | 2010-09-30 |
EP1799334A4 (en) | 2009-05-06 |
US20130299411A1 (en) | 2013-11-14 |
JP4896025B2 (en) | 2012-03-14 |
EP1799334A1 (en) | 2007-06-27 |
EP1799334B1 (en) | 2013-12-11 |
US8506806B2 (en) | 2013-08-13 |
CA2579857A1 (en) | 2006-03-23 |
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