C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 9/14 (2006.01) C02F 3/04 (2006.01) C02F 3/12 (2006.01)
Patent
CA 2379636
The invention relates to a method for biological purification of wastewater wherein the wastewater is purified in a biofilm process (1) followed by an activated sludge process (2). The biological degradation in the biofilm process is performed under limitation of one of the nutrient salts nitrogen or phosphorous, and the surplus sludge from the biofilm process is allowed to pass to the activated sludge process.
L'invention concerne un procédé de purification biologique d'eaux usées dans lequel les eaux usées sont purifiées au moyen d'un procédé à film biologique (1) puis traitées au moyen d'un procédé à boues activées (2). La dégradation biologique dans le procédé à film biologique est limitée par l'un des sels nutritifs à base d'azote ou de phosphore, et l'excès de boues provenant de ce procédé est envoyé dans le procédé à boues activées.
Malmqvist Asa
Welander Thomas
Kaldnes Miljoteknologi
Na
Veolia Water Solutions & Technologies Support
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