Patent ID: 7754070

Claim:
A system for continuously removing nitrate contaminant from nitrate contaminated water comprising: a plurality of immobile vessels, each containing a resin bed capable of binding nitrate contaminant from said nitrate contaminated water and yielding purified water and a nitrate contaminated resin bed; a plurality of electronically controlled valves fitted to each one of the immobile vessels, one of said valves admitting contaminated water to the vessel, one removing purified water, one admitting regenerant, one admitting rinse liquid and one or more removing regenerant rinse liquid; and an electrical controller directing the plurality of electrically controlled valves so that when the system is in operation continuously removing nitrate contaminant, nitrate contaminated water is flowed to a subset of vessels, regenerant is flowed to a subset of vessels containing the most highly nitrate contaminated resin bed and rinse liquid is flowed to a subset of containing the least contaminated resin bed.