Umshini wokuwasha amakhreyithi ngokuyinhloko wakhiwe ngensimbi engagqwali, ekwazi ukumelana nokugqwala,{0}}ukumelana nezinga lokushisa eliphezulu, nokumelana ne-oxidation. Igcina ukuqina kwesakhiwo ngisho nangemva kokuthintana isikhathi eside namanzi, okokuhlanza, nezinsalela zokudla. 304 insimbi engagqwali ivame ukusetshenziswa ezingxenyeni ezibalulekile; indawo yayo ebushelelezi inciphisa ukukhula kwamagciwane futhi inciphise ingozi yokuguga nokugqwala.
Uhlaka kanye nesistimu yokudlulisa kusebenzisa izinto zensimbi ezijiyile ukuze kuthuthukiswe-umthamo wokuthwala kanye nokungazweli nomthelela. Imishini ibonisa ukuguqulwa okuncane ngesikhathi sokusebenza njalo, inomjikelezo omude wokulungisa, kanye nempilo yesevisi engaphezu kweminyaka eyi-10. Idizayini yesakhiwo iyonke inengqondo, enezingqimba eziqinile zokuvikela ukunqwabelana kokungcola kanye nokuthuthukisa ukuqina. Ukukhetha okubalulekile kulinganisa izimfuneko zamandla nenhlanzeko, okuyenza ifaneleke-izindawo zokuhlanza izimboni ezishubile.
