Process for the removal of ammoniacal nitrogen in the bod...

Details Process for the removal of ammoniacal nitrogen in the bod... Process for the removal of ammoniacal nitrogen in the bod...

C - Chemistry, Metallurgy

02

F

362/17

C02F 3/30 (2006.01)

Patent

CA 1259716

ABSTRACT The present invention provides for an improved method of operating an activated sludge system whereby a significant amount of ammoniacal nitrogen is removed in the BOD sorption zone, which does not later appear in the system as protein or NOX. The improved method for achieving said ammoniacal nitrogen removal comprises reducing the ammoniacal nitrogen concentration of the mixed liquor in the oxidation zone to a point where the mixed liquor leaving the oxidation zone has an ammoniacal nitrogen concentration less than about 0.3 ppm. Additionally, an overall F/Mo ratio equal to or greater than about 0.05 is maintained.

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