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Methane production using resin-wafer electrodeionization

United States Patent

March 25, 2014
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
The present invention provides an efficient method for creating natural gas including the anaerobic digestion of biomass to form biogas, and the electrodeionization of biogas to form natural gas and carbon dioxide using a resin-wafer deionization (RW-EDI) system. The method may be further modified to include a wastewater treatment system and can include a chemical conditioning/dewatering system after the anaerobic digestion system. The RW-EDI system, which includes a cathode and an anode, can either comprise at least one pair of wafers, each a basic and acidic wafer, or at least one wafer comprising of a basic portion and an acidic portion. A final embodiment of the RW-EDI system can include only one basic wafer for creating natural gas.
Snyder; Seth W. (Lincolnwood, IL), Lin; YuPo (Naperville, IL), Urgun-Demirtas; Meltem (Naperville, IL)
U.S. Department of Energy (Washington, DC)
13/ 648,319
October 10, 2012
GOVERNMENT INTERESTS The United States Government has rights in this invention pursuant to Contract No. DE-AC02-06CH11357, between the U.S. Department of Energy (DOE) and UChicago Argonne LLC, representing Argonne National Laboratory.