Method and Device for Removing Contaminant Trace Species, Especially Arsenic, from Water
AssigneeMICRODROP ACQUA ApS
InventorFinn Lebech
Life of this patent
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Abstract
A method and a device for purifying water from contaminant trace species, especially arsenic, by co-precipitating trace species during oxidation and precipitation of iron compounds with subsequent separation. The co-precipitation is improved by contacting the water with an iron-containing material prior to oxidation to increase the iron content of the water. Arsenic and other trace species harmful to health may be removed from water effectively and in a simple manner, thus being able to comply with the more restrictive limits of arsenic in drinking water.
Claims14
1-10. (canceled)
A method for purifying water from contaminant trace species, especially arsenic, by treating said water with iron and co-precipitating trace species during oxidation, and precipitation of iron compounds with subsequent separation, characterized in that
- a) first, the water is contacted without aeration with an iron-containing material for enriching the water with iron compounds,
- b) then, the iron-enriched-water is oxidized for co-precipitation of the contaminant trace species together with oxidized iron compounds, and
- c) finally, the precipitated compounds are separated from the water.
A device for purifying water from contaminant trace species by co-precipitating the trace species comprising an aerator (5) for oxidation and precipitation of iron compounds with subsequent separation, characterized in that a non aerated assembly (2, 3, 4) for supplying iron compounds to the water is incorporated prior to the aerator (5).
Dependencies are inferred from the claim text.