ZWN series micro filter adopts 15-20 micron ventage filter process which terms as micro kānana .Micro kānana mea he 'ano o ka mechanical kānana ala .Ua hoʻohana 'ia e maximally hoʻokaʻawale i ka micro suspended mea (pulp fiber) i loko o ka wai a hoʻomaopopo i ka hookaawale ana o ka paʻa a me ka wai .