Ultra-filtration (UF) bụ usoro nkewa nke akpụkpọ ahụ na-ehicha ma na-ekewa ihe ngwọta.Mgbochi mmetọ PVDF ultrafiltration membrane na-eji polymer ihe polyvinylidene fluoride dị ka isi ihe nkiri akụrụngwa, PVDF akpụkpọ ahụ n'onwe ya nwere ike oxidation nguzogide, mgbe pụrụ iche ihe mgbanwe na nwere ezigbo hydrophilicity, na usoro nke akpụkpọ ahụ site na nkà mmụta sayensị micropore imewe na micropore Ọdịdị njikwa, micropore. pore size ruru ultrafiltration larịị.Ụdị akpụkpọ ahụ nke ngwaahịa a nwere uru nke pores edo, nnukwu nzacha ziri ezi, ntinye mmiri dị elu n'otu mpaghara, nguzogide oxidation na ike tensile dị elu.