Umwuka wa ogisijeni ukenera nanone kwitwa ogisijeni ikenerwa (okisijeni ya chimique), bita COD. Nugukoresha okiside ya chimique (nka potasiyumu permanganate) kugirango okiside kandi ibore ibintu bya okiside mumazi (nkibintu kama, nitrite, umunyu wa ferrous, sulfide, nibindi), an ...
Soma byinshi