Ubwa mbere, nubwo ubwoko bwombi bwoza amazi bushobora kweza umwanda wamazi, amahame yabyo yo kweza ntabwo arimwe. Isuku y'amazi ya RO revers osmose ifite ibikoresho bya RO revers osmose imbere. Bitewe nigitutu cyamazi, amazi arashobora kunyura muri RO membrane, mugihe umwanda nkumunyu ngenga, ion zicyuma kiremereye, bagiteri, na virusi zifungwa na membrane osose.

Ultrafiltration yeza amazi atunganya isoko yamazi binyuze mumbere ya ultrafiltration yimbere. Mugusunika itandukaniro ryumuvuduko, isoko yamazi irashobora kunyura muriki gice cya membrane hanyuma ikayungurura umwanda.

Ubwoko bubiri bwogusukura amazi, bukoresha uburyo butandukanye bwo kweza, bufite itandukaniro muburyo bwo kweza ukurikije amahame yabo. RO isubiza inyuma amazi ya osmose ifite isuku ya RO imbere, kandi imyenge yiyi membrane ni ntoya nkurwego rwa nanometero. Ndetse na virusi ntoya na bagiteri byikubye inshuro ibihumbi ibinini kuruta imyenge ya RO membrane. Kubwibyo, amazi anyura muri RO membrane ahanini arimo amazi gusa ntakindi kintu, kandi amazi yungurujwe arashobora kunywa cyangwa gutekwa.

Amazi meza ya ultrafiltration afite ultrafiltration membrane imbere, kandi ubunini bwa pore buringaniye bwuruyungurura ni 0.01 ~ 0.001μm, nimwe murwego rwubunini buruta ubwa RO revers osmose amazi. Muri icyo gihe, ultrafiltration membrane ntabwo yemerera amazi kunyuramo gusa ahubwo inemerera ibintu bimwe na bimwe bya molekile ntoya ifite umubumbe muto kunyuramo, nkibintu bimwe na bimwe byamabuye y'agaciro.