Process for the removal of ammoniacal nitrogen in the BOD sorpti

Details Process for the removal of ammoniacal nitrogen in the BOD sorpti Process for the removal of ammoniacal nitrogen in the BOD sorpti

1984-07-31

1985-11-12

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210623, 210630, 210903, C02F 330

Patent

active

045526630

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 decreasing 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/M.sub.o ratio equal to or greater than about 0.05 is maintained.

REFERENCES:
patent: 3964998 (1976-06-01), Barnard
patent: 3994802 (1976-11-01), Casey et al.
patent: 4056465 (1977-11-01), Spector
patent: 4162153 (1979-07-01), Spector
patent: 4271026 (1981-06-01), Chen et al.

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