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Improved seawater desalination with nanocomposite membranes
In the last 30 months, industrial research into nanocomposite RO (reverse osmosis) membranes has resulted in the development of a new mixed matrix membrane material for seawater desalination. In this relatively short period, nanocomposite membranes have shown the potential for performance exceeding that of existing commercial products based on the standardised polymer chemistry used in RO membranes for the last several decades. This technology is now in the process of being commercialised with trials on a specially designed full-scale manufacturing line underway for a mid-2010 product release. Optimised TFN (thin-film nanocomposite) membranes were compared with current commercial high flux SWRO (salt water RO) products and found to have improved flux and rejection. The promising results from hand-cast membrane samples and scale-up tests appear to validate that a conventional coating machine and element fabrication facility can be used for scale up of the TFN membrane technology for handling nanoparticle dispersions. The relatively stable flux and rejection indicated that the performance enhancement of the nanocomposite film is not a short-term performance enhancement, but rather a fundamentally different separation layer. The TFN membranes showed CIP (clean-in-place) stability, i.e. they were stable through cleaning cycles, and the performance even improved to the baseline after the second CIP. No evidence for chemical degradation was found. Although further testing is needed to fully validate, the relatively modest flux loss and later flux recovery during a red tide event also suggest improved tolerance to some biofouling events.
Improved seawater desalination with nanocomposite membranes
In the last 30 months, industrial research into nanocomposite RO (reverse osmosis) membranes has resulted in the development of a new mixed matrix membrane material for seawater desalination. In this relatively short period, nanocomposite membranes have shown the potential for performance exceeding that of existing commercial products based on the standardised polymer chemistry used in RO membranes for the last several decades. This technology is now in the process of being commercialised with trials on a specially designed full-scale manufacturing line underway for a mid-2010 product release. Optimised TFN (thin-film nanocomposite) membranes were compared with current commercial high flux SWRO (salt water RO) products and found to have improved flux and rejection. The promising results from hand-cast membrane samples and scale-up tests appear to validate that a conventional coating machine and element fabrication facility can be used for scale up of the TFN membrane technology for handling nanoparticle dispersions. The relatively stable flux and rejection indicated that the performance enhancement of the nanocomposite film is not a short-term performance enhancement, but rather a fundamentally different separation layer. The TFN membranes showed CIP (clean-in-place) stability, i.e. they were stable through cleaning cycles, and the performance even improved to the baseline after the second CIP. No evidence for chemical degradation was found. Although further testing is needed to fully validate, the relatively modest flux loss and later flux recovery during a red tide event also suggest improved tolerance to some biofouling events.
Improved seawater desalination with nanocomposite membranes
Kurth, C.J. (author) / Burk, Robert L. (author) / Green, Jeff (author)
2010
10 Seiten, 7 Bilder, 1 Tabelle, 6 Quellen
Conference paper
Storage medium
English
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