Difference between revisions of "MemEOL"
From Desal Wiki
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The method for chemical conversion of RO membranes has been optimised, with controlled exposure to 300,000 ppm.hr of NaOCl resulting in organic and virus removal properties, and hydraulic performance, comparable to commercially available 10 – 30 kDa molecular weight cut off UF membranes. Potential applications for the converted RO membranes include use in pre-treatment filtration in desalination plant, waste water treatment or for low cost water treatment in developing areas. | The method for chemical conversion of RO membranes has been optimised, with controlled exposure to 300,000 ppm.hr of NaOCl resulting in organic and virus removal properties, and hydraulic performance, comparable to commercially available 10 – 30 kDa molecular weight cut off UF membranes. Potential applications for the converted RO membranes include use in pre-treatment filtration in desalination plant, waste water treatment or for low cost water treatment in developing areas. | ||
| − | This promising end-of-life application how now been extensively validated, and is ready for a trial application. If you require a series of extremely low cost, environmentally friendly, spiral wound UF membranes, please contact Pierre Le-Clech (mailto:p.le-clech@unsw.edu.au) for further information. | + | This promising end-of-life application how now been extensively validated, and is ready for a trial application. If you require a series of extremely low cost, environmentally friendly, spiral wound UF membranes, please contact Pierre Le-Clech ([mailto:p.le-clech@unsw.edu.au p.le-clech@unsw.edu.au]) for further information. |
===References=== | ===References=== | ||
| Line 751: | Line 751: | ||
<div class="recommendation reuse_as_ro reuse_as_ro_subheading reuse-3 alert alert-info" role="alert" alt="Direct reuse as a low quality brackishwater RO membranes." style="display: none;">Direct reuse as a low quality brackishwater RO membranes</div> | <div class="recommendation reuse_as_ro reuse_as_ro_subheading reuse-3 alert alert-info" role="alert" alt="Direct reuse as a low quality brackishwater RO membranes." style="display: none;">Direct reuse as a low quality brackishwater RO membranes</div> | ||
<div class="recommendation reuse_as_ro reuse_as_ro_subheading reuse-4 alert alert-info" role="alert" alt="Direct reuse as a medium quality nanofiltration membranes" style="display: none;">Direct reuse as a medium quality nanofiltration membranes</div> | <div class="recommendation reuse_as_ro reuse_as_ro_subheading reuse-4 alert alert-info" role="alert" alt="Direct reuse as a medium quality nanofiltration membranes" style="display: none;">Direct reuse as a medium quality nanofiltration membranes</div> | ||
| + | <div class="recommendation reuse_as_ro" style="display: none;"> | ||
| + | <table class="table table-bordered table-striped table-responsive"> | ||
| + | <tbody><tr> | ||
| + | <td>Compatible with plastic components</td> | ||
| + | <td>Yes</td> | ||
| + | </tr><tr> | ||
| + | <td>Compatible with fibreglass components</td> | ||
| + | <td>Yes</td> | ||
| + | </tr><tr> | ||
| + | <td>Available in Australia</td> | ||
| + | <td>Yes</td> | ||
| + | </tr><tr> | ||
| + | <td>Available globally</td> | ||
| + | <td>Yes</td> | ||
| + | </tr><tr> | ||
| + | <td>Manual disassembly required</td> | ||
| + | <td>No</td> | ||
| + | </tr></tbody> | ||
| + | </table> | ||
| + | </div> | ||
| + | <div class="recommendation reuse_as_ro" style="display: none;"> | ||
| + | </body></html> | ||
| + | Direct membrane reuse is one of the most favourable end-of-life options across all categories, and is recommended for all situations where it is possible<ref name="lawler-2014-H" />. Direct membrane reuse involves taking membranes that have been deemed unsuitable for their primary application from one plant and transporting them to a secondary plant, potentially for use in harsh conditions were high replacement rates makes low cost second hand modules economically attractive. | ||
| + | |||
| + | Although direct reuse of used membranes without any additional treatment is obviously preferred, appropriate assessment of their current performances, further validation and potential chemical cleaning will most likely be required. Information on the used membrane performance from the plant of origin, as well as a number of additional monitoring and characterisation methods, can enable a tailored cleaning system to be developed<ref name="pontie" />. Based on the type of feed water used and location of the RO membranes within the filtration train, standard chemical cleaning protocols could be established in order to efficiently remove most of the fouling/scaling that may have occurred during the filtration. A critical step in this reuse process is the validation of the cleaned membranes, as integrity, permeability and rejection must be demonstrated before the membranes can be successfully reused. | ||
| + | |||
| + | To date, one US-based company, [http://www.watersurplus.com WaterSurplus], has recognised the potential directly reusing membranes. The company offers a wide range of surplus new, as well as used, cleaned and repackaged, RO, UF and NF Membranes and associated equipment. While a third party company managing the reuse process is helpful, it is not necessary for its success. The long term goal of this MemEOL tool is to develop a database of used membranes, which will help directly connect primary and secondary users. If you currently have membranes that you would like to provide for direct reuse, or are looking for low cost used membranes, please contact Pierre Le-Clech ([mailto:p.le-clech@unsw.edu.au p.le-clech@unsw.edu.au]) for further information. | ||
| + | |||
| + | Based on the inputs provided, the used membranes have been categorised in the table below. Please refer to this table for information about potential applications, quality ranking and expected reuse lifespan. | ||
| + | |||
| + | ===References=== | ||
| + | <references> | ||
| + | <ref name="lawler-2014-H">Lawler, W.; Alvarez-Gaitan, J.; Leslie, G.; Le-Clech, P. "Assessment of End-of-Life Opportunities for Reverse Osmosis Membranes." The University of New South Wales (2015).</ref> | ||
| + | <ref name="pontie">Pontié, M.; Rapenne, S.; Thekkedath, A.; Duchesne, J.; Jacquemet, V.; Leparc, J. Desalination (2005), 181, 75-90</ref> | ||
| + | </references> | ||
| + | <html><head></head><body> | ||
| + | </div> | ||
<div class="recommendation reuse_as_ro" style="display: none;"> | <div class="recommendation reuse_as_ro" style="display: none;"> | ||
<table class="table table-bordered table-hover table-responsive"> | <table class="table table-bordered table-hover table-responsive"> | ||
| Line 998: | Line 1,035: | ||
The method for chemical conversion of RO membranes has been optimised, with controlled exposure to 300,000 ppm.hr of NaOCl resulting in organic and virus removal properties, and hydraulic performance, comparable to commercially available 10 – 30 kDa molecular weight cut off UF membranes. Potential applications for the converted RO membranes include use in pre-treatment filtration in desalination plant, waste water treatment or for low cost water treatment in developing areas. | The method for chemical conversion of RO membranes has been optimised, with controlled exposure to 300,000 ppm.hr of NaOCl resulting in organic and virus removal properties, and hydraulic performance, comparable to commercially available 10 – 30 kDa molecular weight cut off UF membranes. Potential applications for the converted RO membranes include use in pre-treatment filtration in desalination plant, waste water treatment or for low cost water treatment in developing areas. | ||
| − | This promising end-of-life application how now been extensively validated, and is ready for a trial application. If you require a series of extremely low cost, environmentally friendly, spiral wound UF membranes, please contact Pierre Le-Clech (mailto:p.le-clech@unsw.edu.au) for further information. | + | This promising end-of-life application how now been extensively validated, and is ready for a trial application. If you require a series of extremely low cost, environmentally friendly, spiral wound UF membranes, please contact Pierre Le-Clech ([mailto:p.le-clech@unsw.edu.au p.le-clech@unsw.edu.au]) for further information. |
===References=== | ===References=== | ||
| Line 1,013: | Line 1,050: | ||
<div class="alternative reuse_as_ro reuse_as_ro_subheading reuse-3 alert alert-info" role="alert" alt="Direct reuse as a low quality brackishwater RO membranes." style="display: none;">Direct reuse as a low quality brackishwater RO membranes</div> | <div class="alternative reuse_as_ro reuse_as_ro_subheading reuse-3 alert alert-info" role="alert" alt="Direct reuse as a low quality brackishwater RO membranes." style="display: none;">Direct reuse as a low quality brackishwater RO membranes</div> | ||
<div class="alternative reuse_as_ro reuse_as_ro_subheading reuse-4 alert alert-info" role="alert" alt="Direct reuse as a medium quality nanofiltration membranes" style="display: none;">Direct reuse as a medium quality nanofiltration membranes</div> | <div class="alternative reuse_as_ro reuse_as_ro_subheading reuse-4 alert alert-info" role="alert" alt="Direct reuse as a medium quality nanofiltration membranes" style="display: none;">Direct reuse as a medium quality nanofiltration membranes</div> | ||
| + | <div class="alternative reuse_as_ro" style="display: none;"> | ||
| + | <table class="table table-bordered table-striped table-responsive"> | ||
| + | <tbody><tr> | ||
| + | <td>Compatible with plastic components</td> | ||
| + | <td>Yes</td> | ||
| + | </tr><tr> | ||
| + | <td>Compatible with fibreglass components</td> | ||
| + | <td>Yes</td> | ||
| + | </tr><tr> | ||
| + | <td>Available in Australia</td> | ||
| + | <td>Yes</td> | ||
| + | </tr><tr> | ||
| + | <td>Available globally</td> | ||
| + | <td>Yes</td> | ||
| + | </tr><tr> | ||
| + | <td>Manual disassembly required</td> | ||
| + | <td>No</td> | ||
| + | </tr></tbody> | ||
| + | </table> | ||
| + | </div> | ||
| + | <div class="alternative reuse_as_ro" style="display: none;"> | ||
| + | </body></html> | ||
| + | Direct membrane reuse is one of the most favourable end-of-life options across all categories, and is recommended for all situations where it is possible<ref name="lawler-2014-H" />. Direct membrane reuse involves taking membranes that have been deemed unsuitable for their primary application from one plant and transporting them to a secondary plant, potentially for use in harsh conditions were high replacement rates makes low cost second hand modules economically attractive. | ||
| + | |||
| + | Although direct reuse of used membranes without any additional treatment is obviously preferred, appropriate assessment of their current performances, further validation and potential chemical cleaning will most likely be required. Information on the used membrane performance from the plant of origin, as well as a number of additional monitoring and characterisation methods, can enable a tailored cleaning system to be developed<ref name="pontie" />. Based on the type of feed water used and location of the RO membranes within the filtration train, standard chemical cleaning protocols could be established in order to efficiently remove most of the fouling/scaling that may have occurred during the filtration. A critical step in this reuse process is the validation of the cleaned membranes, as integrity, permeability and rejection must be demonstrated before the membranes can be successfully reused. | ||
| + | |||
| + | To date, one US-based company, [http://www.watersurplus.com WaterSurplus], has recognised the potential directly reusing membranes. The company offers a wide range of surplus new, as well as used, cleaned and repackaged, RO, UF and NF Membranes and associated equipment. While a third party company managing the reuse process is helpful, it is not necessary for its success. The long term goal of this MemEOL tool is to develop a database of used membranes, which will help directly connect primary and secondary users. If you currently have membranes that you would like to provide for direct reuse, or are looking for low cost used membranes, please contact Pierre Le-Clech ([mailto:p.le-clech@unsw.edu.au p.le-clech@unsw.edu.au]) for further information. | ||
| + | |||
| + | Based on the inputs provided, the used membranes have been categorised in the table below. Please refer to this table for information about potential applications, quality ranking and expected reuse lifespan. | ||
| + | |||
| + | ===References=== | ||
| + | <references> | ||
| + | <ref name="lawler-2014-H">Lawler, W.; Alvarez-Gaitan, J.; Leslie, G.; Le-Clech, P. "Assessment of End-of-Life Opportunities for Reverse Osmosis Membranes." The University of New South Wales (2015).</ref> | ||
| + | <ref name="pontie">Pontié, M.; Rapenne, S.; Thekkedath, A.; Duchesne, J.; Jacquemet, V.; Leparc, J. Desalination (2005), 181, 75-90</ref> | ||
| + | </references> | ||
| + | <html><head></head><body> | ||
| + | </div> | ||
<div class="alternative reuse_as_ro" style="display: none;"> | <div class="alternative reuse_as_ro" style="display: none;"> | ||
<table class="table table-bordered table-hover table-responsive"> | <table class="table table-bordered table-hover table-responsive"> | ||
Revision as of 08:51, 13 January 2015
This membrane end-of-life (MemEOL) tool is aimed at promoting better practices in the desalination industry by helping users identify and select the optimum end-of-life option for their used reverse osmosis (RO) membranes. This dynamic and interactive educational tool uses inputs on membrane condition and the relative importance of a number of key criteria to provide recommendation and further information about available end-of-life options.
As user feedback is obtained, and more available end-of-life options are identified and characterised, this tool will become a powerful source of information for membrane users. Ultimately, this tool will include a membrane reuse database, which will allow users to find and contact groups with surplus membrane supplies, thus promoting and simplifying direct membrane reuse. This tool has a significant focus on the Australian desalination industry, but the primary information is highly applicable to countries around the world. Additionally, as the data sources for this tool are not case specific, it should only be considered an educational tool aimed at providing preliminary recommendations to users.