Application of chlorine resistant polyamide RO membrane for household water filtration device

Chlorine attacks the polyamide RO membrane to cause membrane failure as measured by enhanced passage of both salt and water. For this reason, activated carbon pre-filters that remove chlorine are typically placed ahead of RO membranes in home drinking water treatment RO system. A general home drinking water treatment system employing RO is composed of preliminary sediment filter, activated carbon pre-filter, a reverse osmosis membrane, and an activated carbon post-filter. In this respect, a chlorine resistant RO membrane (CRM) is highly desirable not only for simplifying home drinking water treatment RO system by removing activated carbonpre-filter, but also constant exposure to chlorine in the permeated water tank to inhibit microbial activities.