Ground water filter for obtaining drinking water

Details Ground water filter for obtaining drinking water Ground water filter for obtaining drinking water

1990-12-17

1991-12-24

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210643, B01D 6138

Patent

active

050750100

ABSTRACT:
The water filtration system according to the present invention includes a containment vessel(s) in which a filtration matrix is contained. The filtration matrix comprises a plurality of particles on which a regenerative membrane is formed directly on the surface. Through extensive experimentation, it has been found that the conditions suitable for reducing iron and manganese from water entering the vessel can be performed simply by controlling the amount of Fe.sup.3+ and pH in raw water entering the containment vessel. This is true even though the chemical characteristics of the underground water are changing.
In one embodiment, the matrix comprises a plurality of polymeric particles selected from particles having specific gravity ranging from about 1.4 to about 2.7. Further, the particles have a nonuniformity coefficient no greater than about 2, and an average particle diameter ranging from about 1.0 mm to about 1.6 mm. The membrane formed on the particles is a product of reaction between oxygen and an impurity selected from Fe.sup.2+ and manganese. Preferably, the membrane comprises iron oxyhydroxide (FeO(OH)).

REFERENCES:
patent: 4701261 (1987-10-01), Gibbs et al.
Sung et al., "Kinetics and Product of Ferrous Iron Oxygenation in Aqueous Systems", Environment Science and Technology, vol. 14, No. 5, 1980.
Sung, comments on "Identity and Character of Iron Precipitates", authors R. Bruce Robinson et al., J. of Environmental Engineering, vol. 109, No. 1, Feb. 1983, pp. 269-274.
Sung et al., "Some Considerations on Iron Removal", J. of Environmental Engineering, vol. 110, No. 6, Dec. 1984, pp. 1048-1061.

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