Patent ID: 6063268
Filing Date: 2000-05-16
Classification: B01J,C02F,Y02W

Abstract:
Water treatment apparatus, comprising a treatment medium, and a container for containing the treatment medium, wherein:the treatment medium comprises a body of treatment material;the body of treatment material is permeable to the passage of water down through the material, under the action of gravity;the treatment material is of such a nature that, when water is applied to the body of treatment material from above, the treatment material is capable of retaining some of the water within the material, and of holding up such retained water temporarily against passage down through the material;the walls of the container are made from a material which defines apertures;the apertures are large enough and open enough that air or other gas may circulate freely therethrough, into and out of the container, and over the body of treatment material located therein;the apertures are small enough, in relation to the treatment material, that the container physically contains the body of treatment material.