tingofthewater. Thefiltermainlyremovestheorganicsubstance,chlorine,odor,chromoandetctomaketheleftchlorine0.1mg/l. SoasprotecttheROmembranefromdamagebythechlorine.Theactivecarbonshouldbereplacedevery12to15monthsaccordingtothecontentofthechlorinemostly.Commonly,thefiltershouldbebackflushedeveryweek.
3.4TheROdevice.
　TheROdeviceremovesthehydronium,organicsubstance,colloid,bacteriaandotherimpuritybythemethodofmembrane. Andthewatercanbedesaltedandpurified.Thetheoryisasfollows.Thetreatedwaterandtheun