Nri dị ọcha ụlọ na tumadi ji ihe ọṅụṅụ, mmiri ara ehi, cheese, ero, wdg Ọ tumadi nwere mgbanwe ụlọ, ikuku ịsa, ikuku mkpọchi na dị ọcha mmepụta ebe.Microbial urughuru adị n'ebe nile na ikuku na-adị mfe ime ka nri emebi emebi.Ime ụlọ na-adịghị ọcha nwere ike idobe nri na obere okpomọkụ ma mebie nri na oke okpomọkụ site na igbu microorganism iji chekwaa nri na ụtọ.
Were otu n'ime nri anyị dị ọcha dịka ọmụmaatụ.(Bangladesh, 3000m2, ISO 8)
