Method for treating reverse osmosis membranes with chlorine dioxide
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United States of America Patent
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Issued Date -
Mar 24, 2005
app pub date -
Apr 23, 2004
filing date -
Sep 23, 2003
priority date (Note) -
Abandoned
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Abstract
Disclosed is a method for preventing osmotic membrane fouling comprising treating reverse osmotic feed water and membranes with chlorine dioxide at an extremely low concentration, e.g., as low as one part per billion in the feed water. The effective range may be in the range of 1-900 parts per billion. Also disclosed is a membrane separation system in which fouling is prevented using ultraviolet, pH acid adjustment or an electrochemical generator to produce the chlorine dioxide.
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