Filter device

Details Filter device Filter device

C - Chemistry, Metallurgy

02

F

362/1, 195/141

C02F 3/02 (2006.01) C12M 1/12 (2006.01)

Patent

CA 1339618

A filter device for use in the treatment of water to render it potable, which is of particular value in emergency situations, comprises exo-polysaccharide producing, gram-negative bacteria supported upon a water-permeable material which is non-toxic to microorganisms and to human beings, is resistant to temperatures within the range from -15°C to +65°C, and is not readily biodegradable. The device may be freeze-dried to enable it to be stored until it is required for use and may then be reactivated by the addition of water. It may be used as the surface layer in a slow-sand filter.

612731

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