Ko te hanga pepa ka whakaputa i te sulfide alkali, te houra kawa me etahi atu kawakore i te wa e mahi ana te tunu me te tunu kai.Ko nga puhui whanariki penei i te H2S, te methyl mercaptan, te dimethyl mercaptan, me etahi atu hau kino ka hangaia i te wa e pupuhi ana, ka puta ano te hau maota i te wa o te whakangao o te penupenu.Ko te waahi tipu e whakamahi ana i te 120,000 mita tapawha o te peera rino kua whakakikoruatia te mana, e whakamahia ana i te nuinga o te waa mo te whakamaarama o waho o te tuanui me te whakamahana o te pourewa slurry.
Ko nga hua hou i rangahaua, i whakawhanakehia e to maatau kamupene--he kaha te whakamahi i te pepa rino whakakikoruatia ki te whakarewa, te salinization, te tongi, te ta me te tae, te ahumahi matū, te karamu, te whakakikorua hiko, te whakarewa, te chlor-alkali, te whakarewa kore-ferrous me etahi atu ahumahi.He nui ake te whakamahi i roto i nga whakawhitiwhitinga ahumahi kounga teitei me nga ahumahi hoia.
Ka kii matou ko nga tau roa kua neke atu i te tekau tau mo te peera rino whakakikoruatia mana.