C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/12
C02F 3/08 (2006.01) C02F 3/06 (2006.01) C02F 3/10 (2006.01)
Patent
CA 1240418
- 1 - Abstract: A method and apparatus for the purification of water or other contaminated aqueous liquids. The water is passed through a filter comprising a solid backwashable filter medium preferably having pores or slots of 125 microns or less made of biologically nondegradable and non-corrosive material, and having a specific, non- pathogenic aerobic activated sludge layer deposited thereon. The aerobic sludge layer is prepared by aerating mixtures of raw water, diatomaceous earth and preferably an inert particulate biologically non-degradable filter material (such as cellulose powder), for a minimum period of 24 hours, and preferably at least five days. The resulting mixtures containing a specific, non-pathogenic aerobic activated microbiological sludge is recirculated through the solid filter medium in a specific sequence until an activated sludge layer is deposited thereon to the desired thickness. The resulting micronic microbiological filter is more efficient, less bulky, cleaner and easier to use than conventional sand and/or anthracite coal beds used as filters in conventional municipal water treatment plants and the like. When water passed through the resulting filter is then passed through an activated carbon contacter bed at controlled flow rates, the microorganisms colonize the bed and complete the biological degradation of organics contained in the water. Subsequent disinfection (e.g. with chlorine) makes the water potable.
445043
Kirby Eades Gale Baker
Klein Samuel H.
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