C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 3/00 (2006.01) C02F 3/06 (2006.01) C02F 3/08 (2006.01) C02F 3/30 (2006.01)
Patent
CA 2059638
2059638 9101948 PCTABS00003 A process for biological treatment of waste water is characterized by the following sequence of steps: mixing of the incoming raw waste water with activated sludge containing a first, chemoorganotrophic biocenosis in an anaerobic preliminary stage (APS); separation of the solution from the activated sludge in an intermediate settling basin (IS); nitrification of the separated solution by means of a second, chemolithotrophic biocenosis in a nitrification stage (NIR) with an aerobic medium; remixing of the nitrified solution with the activated sludge containing the first, chemoorganotrophic biocenosis; common denitrification of the mixture of solution and activated sludge in a denitrication stage (DER) with an anoxic medium; aeration to obtain an aerobic medium; separation of the purified waste water from the activated sludge in a resettling basin (RSB); recycling (C) of the activated sludge to the anaerobic preliminary stage (APS).
Kuhn Eberhard
Swabey Ogilvy Renault
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