C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 5/08 (2006.01)
Patent
CA 2218882
The invention provides a process for the stabilization of raw water having a pH of 2,5-9, an alkalinity of at most 50 mg/l expressed as calcium carbonate, a calcium content of at most 100 mg/l expressed as calcium carbonate, and a positive calcium carbonate dissolution potential. The process comprises separating part of the water from the remainder thereof and acidifying said part to increase its calcium carbonate dissolution potential. The acidified water is then fed through a bed of particles comprising calcium carbonate where said water consumes part of the calcium carbonate thereby increasing the calcium content and the alkalinity of the water which issues from the bed. The water issuing from the bed is then mixed with the remainder of the raw water to obtain an at least partially stabilized product water having a positive calcium carbonate dissolution potential which is at least 2 mg/l calcium carbonate less than that of the raw water.
L'invention concerne un procédé de stabilisation d'eau brute possédant un pH de 2,5-9, une alcalinité de 50 mg/l maximum exprimée en tant que carbonate de calcium, une teneur en calcium de 100 mg/l maximum exprimée en tant que carbonate de calcium et un potentiel positif de dissolution de carbonate de calcium. Ce procédé consiste à séparer une partie de l'eau du reste de l'eau et à acidifier ladite partie afin d'accroître son potentiel de dissolution de carbonate de calcium. On fait ensuite passer l'eau acidifiée à travers un lit de particules comprenant du carbonate de calcium; l'eau consomme une partie du carbonate de calcium, ce qui augmente la teneur en calcium et l'alcalinité de l'eau sortant du lit. On mélange alors l'eau sortant du lit avec le reste d'eau brute afin d'obtenir de l'eau partiellement stabilisée, possédant un potentiel positif de dissolution de carbonate de calcium qui est d'au moins 2 mg/l de carbonate de calcium inférieur à celui de l'eau brute.
de Villiers Hendrik Abraham
Mackintosh Grant Stewart
Implico B.v.
Sim & Mcburney
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