C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/58 (2006.01) C02F 3/30 (2006.01) H01L 21/8246 (2006.01)
Patent
CA 2252656
Sewage water containing phosphate is passed through an anaerobic treatment chamber containing reductive-iron-dissolution (RID) material, such as ferric oxyhydroxide solids. The RID material releases ferrous ions into solution, which combine with the phosphate to produce ferrous-phosphate minerals, such as vivianite, which precipitate in the anaerobic chamber. Also, iron and phosphate remaining in the water can precipitate as ferric-phosphate minerals such as strengite, when the water is later aerated.
On fait passer des eaux usées contenant du phosphate dans un compartiment de traitement anaérobie, contenant une matière de réduction et de dissolution à base de fer, comme l'oxyhydroxyde ferrique à l'état solide. Ladite matière libère des ions ferreux dans la solution, lesquels se combinent avec le phosphate pour former des minéraux phosphatés ferreux, comme la vivianite, qui précipitent dans le compartiment anaérobie. De plus, lors de l'aération ultérieure de l'eau, le fer et le phosphate encore présents dans l'eau peuvent précipiter sous forme de minéraux phosphatés ferriques, comme la strengite.
Asquith Anthony
University Of Waterloo
LandOfFree
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