Method for treating water containing iron, manganese and arsenic
AssigneeOtv SA
InventorAbdelkader Gaid
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Abstract
A method for treating water to produce potable water is described herein. The inventive method enables the efficient removal of iron, manganese, and arsenic without the addition of powerful oxidants and without requiring a complex procedure for preparing the filtering material. The described method treats the water by passing the water through at least one bed of filter material, where the filter material comprises an association of manganese dioxide grains and at least one iron-based divided material in the hydroxide, oxide, or metallic state. The association may comprise a mixture of the iron-based divided material and the manganese dioxide grains. Alternatively, the association may comprise a superposition of layers of the iron-based divided material and the manganese dioxide grains.
Claims26
A method of treatment of waters, in particular to reduce their iron, manganese and arsenic content,
- the method comprising passing the waters over at least one bed of filter material comprising an association
- of at least one iron-based divided material in the hydroxide state, the iron-based divided material in the form of particles of dimensions 0.3-2 mm;
- and
- of manganese dioxide grains having an apparent density of the order of 2 and a hardness greater than 6 on Moh's scale.
A method of treating waters to produce potable water comprising:
- generating a filter comprising an association of manganese dioxide grains and at least one iron-based divided material in the hydroxide state, said manganese dioxide grains having an apparent density on the order of 2 and hardness greater the 6 on Moh's scale;
- and
- passing said waters over said filter to generate the potable water.
Dependencies are inferred from the claim text.