Kubwezeretsa ndi njira yochotsa mchere ndi mchere wina wamadzi am'madzi kuti azikhala oyenera kudya kapena kugwiritsa ntchito mafakitale. Izi zimachitika pogwiritsa ntchito njira zosiyanasiyana kuphatikizapo osmosis, distillation ndi electrodisly. Kusaka kwam'madzi kumayamba kupanga gwero lamadzi abwino m'madzi omwe zinthu zatsopano zamadzi ndizochepa kapena zodetsa. Komabe, izi zitha kukhala zovuta kwambiri, komanso brine wokhazikika atasiyidwa atasungidwa mosamala kuti asawononge chilengedwe.

Yantai jieeland yapakati pa kapangidwe, amapanga makina osokoneza bongo am'madzi osokoneza bongo kwa 20years. Akatswiri azaukadaulo amatha kupanga kapangidwe ka kasitomala kofunikira ndi malo enieni.