C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 3/28 (2006.01)
Patent
CA 2745209
In a sewage disposal system, a de-nitrification station is configured as a heap of foam cubes located in an airtight enclosure from which oxygen is excluded. Carbon is added to the incoming nitrified water. The heap of foam cubes is arranged as a free-draining trickle filter, but here under asphyxiant conditions in the enclosure. Anaerobic microbiological reactions reduce the nitrate to nitrogen gas. Effluent from the de-nitrifier is polished by feeding back a fraction of the effluent through the aeration station from which the nitrate water is derived, or a separate polishing station can be provided.
Linvention concerne un système délimination des eaux dégouts comprenant un poste de dénitrification configuré comme une pile de cubes de mousse situés dans une enceinte étanche à l'air dont loxygène est exclu. On ajoute du carbone à l'eau nitrifiée entrante. On dispose la pile de cubes de mousse comme filtre de ruissellement à drainage libre, mais ici dans des conditions asphyxiantes dans lenceinte. Des réactions microbiologiques anaérobies réduisent le nitrate en gaz d'azote. On polit leffluent provenant du dénitrificateur en renvoyant une fraction de leffluent à travers le poste d'aération dont leau de nitrate est dérivée, ou bien on peut aménager un poste de polissage séparé.
Asquith Anthony
Rowanwood Ip Inc.
LandOfFree
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