278632 Application of Bioelectrochemical Systems to Hexavalent Chromium Remediation

Monday, October 29, 2012: 3:40 PM
331 (Convention Center )
Lewis Hsu, Energy and Environmental Sciences Division, SPAWAR Systems Center Pacific, San Diego, CA, Kenneth H. Nealson, Department of Earth Sciences, University of Southern California, Los Angeles, CA and Scott Ernst, NOCO Energy Corporation, Tonawanda, NY

Interest in bioelectrochemical systems, including microbial fuel cells, has grown in recent years with regards to treatment of wastewater streams. As a potential sustainable treatment technology, these systems are able to capture chemical energy in the waste stream by performing a direct conversion to electrical energy. Recent studies have also shown that these systems are an ideal solution for controlling redox chemistry in aqueous solutions, presenting a promising approach for controlling certain heavy metals and radionuclides.

     This presentation will focus on an implementation of this technology to treat hexavalent chromium contamination in drinking water systems. Laboratory testing showed removal of hexavalent chromium to less than 2 ppb. Results from treatment and removal of hexavalent chromium with both single species and mixed bacterial communities in these bioelectrochemical systems will be shown here.

     A possible in situ treatment method to polish or remove relatively low chromium contamination from groundwater utilized for drinking water (e.g. well water) will also be presented. Possible extension of this technology to other contaminants (uranium, selenium) will also be presented.


Extended Abstract: File Not Uploaded
See more of this Session: Treatment of Trace Inorganic Contaminants II
See more of this Group/Topical: Environmental Division