Cost effective process for detoxification of cyanide containing effluents

Cost effective process for detoxification of cyanide containing effluents

This invention pertains to a method of treating cyanide contained in wastewater with particularly high levels of solids in the stream. The process involves either simultaneous or step-wise dosage of hydrogen peroxide in the form of an aqueous solution of a concentration between 35% to 90% by weight,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ROY NORCROSS, FRIEDHELM MERZ, M. QUAMRUL AHSAN, HELMUT KNORRE, STEPHEN GOS
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:This invention pertains to a method of treating cyanide contained in wastewater with particularly high levels of solids in the stream. The process involves either simultaneous or step-wise dosage of hydrogen peroxide in the form of an aqueous solution of a concentration between 35% to 90% by weight, preferably at least 50% by weight, and SO2 either in the form of gaseous SO2 or solution of sodium and/or potassium sulfite or metabisulfite resulting in the conversion of cyanide ions to non-toxic cyanate ions.