Method for operating reverse osmosis membrane device

Abstract

Provided is a method for operating a reverse osmosis membrane device which has a reverse osmosis membrane element and in which treated water is obtained by passing water to be treated that contains a scale component through the reverse osmosis membrane device, said method being characterized in that: the reverse membrane element includes a reverse osmosis membrane and a feed channel spacer; a dense layer of the reverse osmosis membrane contains carbon nanotubes and cellulose nanofibers; the feed channel spacer contains carbon nanotubes; and a scale dispersant is added to the water to be treated.

Dependencies are inferred from the claim text.