Waste water treating method and waste water treating apparatus

Details Waste water treating method and waste water treating apparatus Waste water treating method and waste water treating apparatus

2006-03-28

2006-03-28

Hoey, Betsey Morrison (Department: 1724)

Liquid purification or separation

Processes

Utilizing electrical or wave energy directly applied to...

C210S756000, C210S760000, C210S198100, C210S903000, C210S906000

Reexamination Certificate

active

07018543

ABSTRACT:
An object of the present invention is to provide a waste water treating method and a waste water treating apparatus which are capable of treating for-treatment water containing a nitrogen compound and a phosphorus compound at low costs and efficiently. The waste water treating method is a waste water treating method for treating a nitrogen compound (nitrate nitrogen) and a phosphorus compound (phosphate ions) in for-treatment water by electrolysis as an electrochemical process, the method comprises a first treating step of immersing a pair of electrodes in the for-treatment water at least partially so as to treat the for-treatment water by electrolysis, one of the electrodes being a cathode made of a conductive material and the other of the electrodes being an anode made of iron, and a second treating step of treating the for-treatment water with hypochlorous acid, ozone or active oxygen after completion of the first treating step.

REFERENCES:
patent: 5435894 (1995-07-01), Hayakawa
patent: 5437776 (1995-08-01), Schwabegger et al.
patent: 5858249 (1999-01-01), Higby
patent: 6132627 (2000-10-01), Joko et al.
patent: 6398968 (2002-06-01), Higby

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