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In-tank recirculating arsenic treatment system

United States Patent

April 7, 2009
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
Hedgehog™ Water Contaminant Removal System
A low-cost, water treatment system and method for reducing arsenic contamination in small community water storage tanks. Arsenic is removed by using a submersible pump, sitting at the bottom of the tank, which continuously recirculates (at a low flow rate) arsenic-contaminated water through an attached and enclosed filter bed containing arsenic-sorbing media. The pump and treatment column can be either placed inside the tank (In-Tank) by manually-lowering through an access hole, or attached to the outside of the tank (Out-of-Tank), for easy replacement of the sorption media.
Brady; Patrick V. (Albuquerque, NM), Dwyer; Brian P. (Albuquerque, NM), Krumhansl; James L. (Albuquerque, NM), Chwirka; Joseph D. (Tijeras, NM)
Sandia Corporation (Albuquerque, NM)
12/ 113,354
May 1, 2008
FEDERALLY SPONSORED RESEARCH The United States Government has rights in this invention pursuant to Department of Energy Contract No. DE-AC04-94AL85000 with Sandia Corporation.