Liquid purification or separation – Processes – Utilizing electrical or wave energy directly applied to...
Patent
1997-12-17
2000-10-17
Simmons, David A.
Liquid purification or separation
Processes
Utilizing electrical or wave energy directly applied to...
210756, 210763, 210903, C02F 176
Patent
active
061326275
ABSTRACT:
Waste water containing nitrogen compounds is treated by first breaking the nitrogen compounds down by electrolysis in the presence of chlorine ions. The electrolysis step converts chlorine ions to hypochlorite ions. The partially treated water is returned to a storage container. The hypochlorite ions oxidize the nitrogen compounds and are reconverted to chlorine atoms. The partially treated water then may be returned to the electrolysis container to regenerate hypochlorite ions. In a second step, the partially treated waste water is passed over a metal peroxide catalyst. The metal peroxide catalyst further breaks down the nitrogen compounds, and removes the excess hypochlorite ions.
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patent: 5772897 (1998-06-01), Hancock
Joko Isao
Miwa Satoshi
Kurita Water Industries Ltd.
Lawrence Frank M.
Simmons David A.
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