Ko te Ultra-filtration (UF) he tikanga wehewehe membrane e horoi ana, e wehewehe ana i nga otinga. Anti-pollution PVDF ultrafiltration membrane whakamahi rauemi waerau polyvinylidene fluoride rite te kiriata matua raw rauemi, PVDF membrane ano he kaha te ātete hāoratanga, i muri i te whakarerekētanga rauemi motuhake, me te he hydrophilicity pai, i roto i te tukanga o te membrane i roto i te hoahoa micropore pūtaiao me te mana hanganga micropore, micropore ka tae te rahi o te pore ki te taumata ultrafiltration. Ko tenei momo hua membrane he painga o nga pores rite, te tika o te filtration, te kuhu o te wai mo ia waahanga waahanga, te aukati o te waiora me te kaha o te kaha.