Method and apparatus for treating ammonium-containing liquid

Details Method and apparatus for treating ammonium-containing liquid Method and apparatus for treating ammonium-containing liquid

2005-10-27

2008-08-05

Prince, Fred G. (Department: 1797)

Liquid purification or separation

Processes

Treatment by living organism

C210S631000, C210S198100, C210S205000, C210S903000

Reexamination Certificate

active

07407579

ABSTRACT:
The method for treating an ammonium-containing liquid which biologically denitrifies ammonium contained in the ammonium-containing liquid in an anaerobic atmosphere, the method comprises the steps of: bringing the ammonium-containing liquid into contact with anaerobic bacteria in a biological treatment tank, the anaerobic bacteria having an ability to biologically denitrify the ammonium in the anaerobic atmosphere; and adding nitrite to the biological treatment tank from a nitrite storage tank concurrently with the bringing step, the nitrite storage tank storing the nitrite with a certain concentration.

REFERENCES:
patent: 5221486 (1993-06-01), Fassbender
patent: 6015496 (2000-01-01), Khudenko
patent: A 10-314787 (1998-12-01), None
patent: A 2001-37467 (2001-02-01), None
patent: A 2004-255269 (2004-09-01), None
Guven et al; Implementation of the Anammox Process for Improved Nitrogen Removal; Journal of Environmental Science and Health; vol. A39; No. 7; 2004; pp. 1729-1738.
Strous et al; Ammonium Removal From Concentrated Waste Streams With The Anaerobic Ammonium Oxidation (Anammox) Process In Different Reactor Configurations; Water Research; vol. 31; No. 8; 1997; pp. 1955-1962.
Ahn et al; Anammox and partial denitritation in anaerobic nitrogen removal from piggery waste; Water and Science Technology; vol. 49; No. 5-6; 2004; pp. 145-153.

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