A tertiary system and process for treating a liquid effluent...

Details A tertiary system and process for treating a liquid effluent... A tertiary system and process for treating a liquid effluent...

C - Chemistry, Metallurgy

02

F

C02F 9/14 (2006.01) C02F 1/00 (2006.01) C02F 1/28 (2006.01) C02F 3/02 (2006.01) C02F 3/12 (2006.01) C02F 9/02 (2006.01)

Patent

CA 2625508

Described are a tertiary disinfection system and process for treating a liquid effluent from a domestic secondary treatment unit. The liquid effluent has pathogenic micro-organisms, remaining suspended solids and dissolved organic pollutants. The system has an inlet, a subterranean initial treatment zone filled with a filtering material for removing some suspended solids, dissolved organic pollutants and pathogenic micro-organisms. The initial treatment zone allows the liquid effluent to percolate downward. The system also has a subterranean polishing zone extending horizontally outward from the initial treatment zone, and filled with a filtering material having pore sizes allowing upward capillary dispersion of the liquid effluent. The system also has a subterranean aeration zone having an interface with the initial treatment zone and the polishing zone, to provide aeration enabling aerobic accommodation of microflora for disinfection of the effluent.

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