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OwnerGerardo Buelna, Yann Le Bihan +3inventors
InventorsGerardo Buelna, Yann Le Bihan, Rino Dube, Paul Lessard, Caroline Dufour-L'Arrivee
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A method of biofiltration of a liquid effluent by simultaneous nitrification and denitrification uses the adding of an oxygen source at a predetermined rate and optionally the adding of a carbon source (such as whey) thus enabling the complete transformation of the nitrates (NO3) present in the effluent at the time of treatment through a biofilter. The specific operating conditions favoring the simultaneous nitrification and denitrification include the controlled injection of a slight quantity of air, adjustment of the level of nitrogen load (TKN+NO3) and the level of carbon load thereby making possible elimination for the most part of the release of unwanted nitrogen in the form of NO3 or NO2.
A method for purifying a liquid effluent containing ammoniacal nitrogen, with or without nitrates, by simultaneous nitrification and denitrification, said method comprising the adding of oxygen with a flow rate varying from 0.1 to 0.66 m3/m2.hour to a trickling biofilter in order to recuperate a substantially purified effluent at an outlet of the biofilter.
Dependencies are inferred from the claim text.