CA2605757A1 - Chemical clean for membrane filter - Google Patents
Chemical clean for membrane filter Download PDFInfo
- Publication number
- CA2605757A1 CA2605757A1 CA002605757A CA2605757A CA2605757A1 CA 2605757 A1 CA2605757 A1 CA 2605757A1 CA 002605757 A CA002605757 A CA 002605757A CA 2605757 A CA2605757 A CA 2605757A CA 2605757 A1 CA2605757 A1 CA 2605757A1
- Authority
- CA
- Canada
- Prior art keywords
- membrane
- cleaning agent
- fluid containing
- fluid
- pressure
- 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.)
- Abandoned
Links
- 239000012528 membrane Substances 0.000 title claims abstract 42
- 239000000126 substance Substances 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract 35
- 239000012459 cleaning agent Substances 0.000 claims abstract 28
- 239000012530 fluid Substances 0.000 claims abstract 26
- 239000012466 permeate Substances 0.000 claims abstract 18
- 238000004140 cleaning Methods 0.000 claims abstract 9
- 239000011148 porous material Substances 0.000 claims abstract 7
- 239000007787 solid Substances 0.000 claims abstract 2
- 239000000835 fiber Substances 0.000 claims 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid group Chemical group C(CC(O)(C(=O)O)CC(=O)O)(=O)O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims 3
- 239000002738 chelating agent Substances 0.000 claims 2
- 238000001914 filtration Methods 0.000 claims 2
- 238000005374 membrane filtration Methods 0.000 claims 2
- 230000000717 retained effect Effects 0.000 claims 2
- 230000003068 static effect Effects 0.000 claims 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims 1
- 230000002378 acidificating effect Effects 0.000 claims 1
- 239000003153 chemical reaction reagent Substances 0.000 claims 1
- 229910052801 chlorine Inorganic materials 0.000 claims 1
- 239000000460 chlorine Substances 0.000 claims 1
- 229910052736 halogen Inorganic materials 0.000 claims 1
- 150000002367 halogens Chemical class 0.000 claims 1
- 238000001471 micro-filtration Methods 0.000 claims 1
- 238000001728 nano-filtration Methods 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 230000002829 reductive effect Effects 0.000 claims 1
- 239000004094 surface-active agent Substances 0.000 claims 1
- 238000000108 ultra-filtration Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
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
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- 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
- B01D61/22—Controlling or regulating
-
- 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
- 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
- B01D2321/16—Use of chemical agents
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A method of cleaning a porous polymeric membrane having a feed side and a permeate side including the steps of introducing a fluid containing a cleaning agent to the permeate side of a membrane allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time, and contact the pores of the membrane, or introducing a fluid containing a cleaning agent to the feed side of a membrane; applying a transmembrane pressure to force the fluid containing the cleaning agent from the feed side to the permeate side of the membrane; allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time, and contact the pores of the membrane. Preferably a concentration gradient between the feed side fluid and the lumen side fluid containing the cleaning agent causes cleaning agent to diffuse into the feed side fluid. Pressure may be applied to the fluid containing a cleaning agent to dislodge, where present, dissolved and undissolved solid from the membrane pores. The pressure may be applied in a pulsed fashion, and can be by way of compressed air at a pressure not more than the membrane's bubble point. The methods of the present invention may be preceded by, or followed with a backwash.
Claims (33)
1. A method of cleaning a hollow fibre porous polymeric membrane having a feed side and a permeate side including the steps of:
introducing a fluid containing a cleaning agent to the permeate side of a membrane;
allowing the cleaning agent to contact the permeate side of the membrane under static pressure for a predetermined time and contact the pores of the membrane.
introducing a fluid containing a cleaning agent to the permeate side of a membrane;
allowing the cleaning agent to contact the permeate side of the membrane under static pressure for a predetermined time and contact the pores of the membrane.
2. A method of cleaning a hollow fibre porous polymeric membrane having a feed side and a permeate side including the steps of:
introducing a fluid containing a cleaning agent to the feed side of a membrane;
applying a transmembrane pressure to force the fluid containing the cleaning agent from the feed side to the permeate side of the membrane;
allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time and contact the pores of the membrane.
introducing a fluid containing a cleaning agent to the feed side of a membrane;
applying a transmembrane pressure to force the fluid containing the cleaning agent from the feed side to the permeate side of the membrane;
allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time and contact the pores of the membrane.
3. A method according to claim 2 wherein the transmembrane pressure is a small differential pressure.
4. A method of cleaning a hollow fibre porous polymeric membrane having a feed side and a permeate side including the steps of:
providing a feed side fluid in contact with the feed side of the membrane;
introducing a fluid containing a cleaning agent to the permeate side of a membrane;
allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time to contact the pores of the membrane and diffuse into the feed side fluid.
providing a feed side fluid in contact with the feed side of the membrane;
introducing a fluid containing a cleaning agent to the permeate side of a membrane;
allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time to contact the pores of the membrane and diffuse into the feed side fluid.
5. A method according to claim 4 wherein a concentration gradient between the feed side fluid and the lumen side fluid containing the cleaning agent causes cleaning agent to diffuse into the feed side fluid.
6. A method according to claim 5 wherein the feed side fluid is lower in concentration of cleaning agent than the lumen side fluid.
7. A method according to any one of the preceding claims further including the step of applying pressure to the fluid containing a cleaning agent on the permeate side to dislodge, where present, dissolved and undissolved solid from the membrane pores.
8. A method according to claim 7 wherein the pressure is applied in a pulsed fashion.
9. A method according to claim 7 or 8 wherein the membrane has a bubble point and pressure is by way of compressed air at a pressure not more than the membrane's bubble point.
10. A method according to any one of the preceding claims preceded by a backwash.
11. A method according to any one of the preceding claims followed by a backwash prior to the recommencement of filtration.
12. A method according to any one of the preceding claims repeated in cycles.
13. A method according to any one of the preceding claims wherein the porous polymeric membrane is part of a pressurized membrane filtration or immersed membrane filtration system.
14. A method according to any one of the preceding claims wherein the membrane is selected from a microfiltration, ultrafiltration or nanofiltration membrane.
15. A method according to any one of the preceding claims wherein the membrane is a capillary or flatsheet membrane.
16. A method according to any one of the preceding claims wherein the membranes are hollow fibre membranes, having a lumen side (permeate side) and a module or shell side (feed side).
17. A method according to claim 16 wherein a plurality of hollow fibre membranes are housed inside a module housing.
18. A method according to claim 17 wherein a plurality of the membranes is arranged in aligned bundles, creating a plurality of lumen spaces inside the hollow fibres and a contiguous space on the outer or shell side of the hollow fibres and wherein the lumens are arranged so that filtered fluid accumulates therein and is passed from the plurality of lumens into a combined filtration stream.
19. A method according to any one of the preceding claims wherein the fluid is water.
20. A method according to claim 18 or 19 wherein the fluid containing a cleaning agent is introduced to the lumens of these hollow fibre membranes.
21. A method according to claim 18 or 19 wherein the fluid containing a cleaning agent is introduced to the shell side of the membrane.
22. A method according to claim 21 wherein the fluid containing a cleaning agent is introduced to the shell side of the membrane by partially filling the shell side of the module before being transported into the lumens.
23. A method according to any one of the preceding claims wherein the fluid containing the diffusible cleaning agent is retained in the membrane permeate side without applied pressure.
24. A method according to any one of claims 1 to 22 wherein the fluid containing the diffusible cleaning agent is retained in the membrane permeate side with pressure approximately equal to the static head pressure.
25. A method according to any one of the preceding claims wherein the cleaning solution is any conventional cleaning solution.
26. A method according to claim 25 wherein the cleaning solution is acidic, basic or neutral.
27. A method according to claim 25 or 26 wherein the cleaning solution is oxidative or reductive.
28. A method according to any one of claims 25 to 27 wherein the cleaning agent is inorganic or organic.
29. A method according to claim 25 wherein the cleaning agent includes dissolved halogens, such as chlorine.
30. A method according to claim 25 wherein the cleaning agent includes sulfite based reagents.
31. A method according to claim 25 wherein the cleaning agent includes a chelating agents.
32. A method according to claim 31 wherein the chelating agent is citric acid or EDTA.
33. A method according to any one of claims 25 to 32 wherein a surfactant is added to the cleaning solution.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005902169 | 2005-04-29 | ||
AU2005902169A AU2005902169A0 (en) | 2005-04-29 | Maintenance clean for membrane filter | |
PCT/AU2006/000552 WO2006116797A1 (en) | 2005-04-29 | 2006-04-28 | Chemical clean for membrane filter |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2605757A1 true CA2605757A1 (en) | 2006-11-09 |
Family
ID=37307514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002605757A Abandoned CA2605757A1 (en) | 2005-04-29 | 2006-04-28 | Chemical clean for membrane filter |
Country Status (8)
Country | Link |
---|---|
US (1) | US9675938B2 (en) |
EP (1) | EP1885475B1 (en) |
JP (1) | JP2008539054A (en) |
KR (1) | KR20080005993A (en) |
CN (1) | CN101184548B (en) |
CA (1) | CA2605757A1 (en) |
NZ (1) | NZ562786A (en) |
WO (1) | WO2006116797A1 (en) |
Families Citing this family (53)
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US6641733B2 (en) * | 1998-09-25 | 2003-11-04 | U. S. Filter Wastewater Group, Inc. | Apparatus and method for cleaning membrane filtration modules |
AUPR421501A0 (en) | 2001-04-04 | 2001-05-03 | U.S. Filter Wastewater Group, Inc. | Potting method |
AUPR692401A0 (en) | 2001-08-09 | 2001-08-30 | U.S. Filter Wastewater Group, Inc. | Method of cleaning membrane modules |
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 |
NZ545206A (en) | 2003-08-29 | 2009-03-31 | Siemens Water Tech Corp | Backwash |
WO2005046849A1 (en) | 2003-11-14 | 2005-05-26 | U.S. Filter Wastewater Group, Inc. | 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 |
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- 2006-04-28 CA CA002605757A patent/CA2605757A1/en not_active Abandoned
- 2006-04-28 JP JP2008508024A patent/JP2008539054A/en active Pending
- 2006-04-28 WO PCT/AU2006/000552 patent/WO2006116797A1/en not_active Application Discontinuation
- 2006-04-28 EP EP06721432.0A patent/EP1885475B1/en not_active Not-in-force
- 2006-04-28 US US11/912,859 patent/US9675938B2/en active Active
- 2006-04-28 KR KR1020077027699A patent/KR20080005993A/en not_active Application Discontinuation
- 2006-04-28 NZ NZ562786A patent/NZ562786A/en not_active IP Right Cessation
- 2006-04-28 CN CN2006800183237A patent/CN101184548B/en not_active Expired - Fee Related
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US20080203017A1 (en) | 2008-08-28 |
US9675938B2 (en) | 2017-06-13 |
EP1885475A1 (en) | 2008-02-13 |
JP2008539054A (en) | 2008-11-13 |
NZ562786A (en) | 2010-10-29 |
CN101184548B (en) | 2011-10-05 |
EP1885475B1 (en) | 2015-03-25 |
WO2006116797A1 (en) | 2006-11-09 |
CN101184548A (en) | 2008-05-21 |
EP1885475A4 (en) | 2011-03-09 |
KR20080005993A (en) | 2008-01-15 |
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