METHOD FOR TREATING AN INDUSTRIAL EFFLUENT CHARGED WITH ALUMINIUM USING CO2

METHOD FOR TREATING AN INDUSTRIAL EFFLUENT CHARGED WITH ALUMINIUM USING CO2

A method for treatment of an industrial effluent with aluminum, comprising:the effluent to be treated is carried to a first zone constituted by a tank having a pH of less than 9.5, so as to promote precipitation of the aluminum in aluminum hydroxide form and to facilitate its removal;a second zone i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BRAS, Dominique, ALBAN, Bruno, CAMPO, Philippe
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
INORGANIC CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:A method for treatment of an industrial effluent with aluminum, comprising:the effluent to be treated is carried to a first zone constituted by a tank having a pH of less than 9.5, so as to promote precipitation of the aluminum in aluminum hydroxide form and to facilitate its removal;a second zone is available and the recirculation of a part of a medium located in the zone 1 to the zone 2 and then return to the zone 1, and the injection of gaseous CO2 into the recirculated medium, are arranged;the solid particles formed in the zone 1 are separated and discharged; wherein in view of the recirculation of the medium where CO2 has been injected, the amount of dissolved CO2 available in the zone 1 is 0.5 to 3 times greater than the requirement necessary for the precipitation of the incoming effluent.