Patent ID: 7520987

Claim:
A housing comprising: a compartment for constraining an adsorptive material, the compartment having an input end, a middle portion and an output end, wherein the compartment is adapted for an aqueous medium to flow through the input end, the middle portion and exit out the output end; a screen or other sieve device that covers the output end of the housing for preventing release of adsorptive materials out of the compartment with the aqueous medium; and a reverse loop adapted to receive and transport aqueous medium and adsorptive material from within the middle portion of the compartment and distribute to the output end of the compartment, wherein the aqueous medium and adsorptive material then re-circulates back to the middle portion of the compartment; wherein the housing is adapted to receive the aqueous medium at the input end and release aqueous medium through the output end and out an outlet in an up-flow direction and wherein the reverse loop is adapted to reverse the direction of flow within the housing to move the aqueous medium from the output end of the compartment and back toward the middle portion of the housing and thereby circulate the aqueous medium back to the outlet end to provide a purging of the adsorptive material.