Mfundo yofunika kwambiri yolekanitsa mpweya ndikugwiritsa ntchito cryogenic rectification kuti mupangitse mpweya kukhala madzi ndikulekanitsa mpweya molingana ndi kutentha kwa chigawo chilichonse. nsanja yokonza magawo awiri nthawi imodzi imapeza nayitrogeni yoyera ndi mpweya wabwino pamwamba ndi pansi pa nsanja yapamwamba. Ndikothekanso kutulutsa mpweya wamadzimadzi ndi nayitrogeni wamadzi kuchokera ku mbali ya nthunzi ndi mbali ya condensation ya kuzirala kwakukulu motsatana. The mpweya kulekana mu rectification nsanja lagawidwa magawo awiri, mpweya analekanitsidwa kwa nthawi yoyamba mu nsanja m'munsi kupeza madzi asafe ndi nthawi yomweyo kupeza mpweya wolemera madzi mpweya. Mpweya wamadzi wodzaza ndi okosijeni umatumizidwa ku nsanja yapamwamba kuti ikonzenso kuti upeze mpweya wabwino komanso nayitrogeni weniweni. nsanja chapamwamba lagawidwa magawo awiri: ndi madzi-mpweya mpweya polowera monga malire, kumtunda ndi gawo rectifying, amene rectifies kukwera mpweya, akuchira chigawo chimodzi cha mpweya, ndi kuyeretsa nayitrogeni chiyero, ndi gawo m'munsi ndi kuvula chigawo kuchotsa zigawo nayitrogeni mu madzi, olekanitsidwa kusintha mpweya chiyero cha madzi.