Westerman, Hattori, Daniels & Adrian LLP
Method of treating reverse osmosis membrane element, and reverse osmosis membrane module
In the treatment, a reverse osmosis membrane element having a polyamide skin layer is loaded in a pressure vessel in a membrane separator and contacted with a bromide-containing aqueous solution of free chlorine. The thus treated reverse osmosis membrane element retains for a long time its effect of reducing solute concentration in a solution treated with the reverse osmosis membrane and rejects efficiently non-electrolytic organic materials or substances such as boron that will not be dissociated in a neutral region. A reverse osmosis membrane module having the thus treated reverse osmosis membrane element is provided as well.
Nitto Denko Corporation Hydranatics
B B B B
B01D B01D B01D B01D
inventional inventional inventional inventional
Mark Masahiko Hisao Terutaka Masaaki Craig Keith
Wilf Hirose Hachisuka Watanabe Andou Bartels Andes