Title: Attenuated Anaerobic Dechlorination of Groundwater Using HRC? 
Resource Type: document --> case study 
Country: USA 
Year: 2008 
Availability: EPA/540/R-08/003 August 2008 
Author 1/Producer: US Environmental Protection Agency (US EPA) 
Other Authors/Producers: MACTEC - Harding ESE 
Author / Producer Type: Agency, regulator or other governmental or inter-governmental body 
Report / download web link (=direct link): http://www.epa.gov/nrmrl/pubs/540r08003/540r08003.pdf  
Format (e.g. PDF): PDF 
EUGRIS Keyword(s): Contaminated land-->Remediation options-->In situ treatment technologies
 
Short description: EXTACT: MACTEC's Harding Environmental Science and Engineering Division (Harding ESE) has designed an in situ Permeable Reactive Barrier Wall (PRBW) that utilizes Hydrogen Release Compound (HRC®) to treat groundwater contaminated with chlorinated compounds. HRC® is a hydrogen-generating compound based on a lactic acid/glycerine polyester that is able to generate free hydrogen under anaerobic conditions. The bacteria consume the HRC® (or hydrolysis products) and produce the hydrogen needed for dechlorination of contaminants. This process takes place along with other anaerobic degradation mechanisms which convert the HRC® to volatile fatty acids such as pyruvic acid, butyric acid, propionic acid, and acetic acid, which in turn are biodegraded by methanogenesis to ethane, methane, and carbon dioxide. 
Link to Organisation(s): EPA Environmental Protection Agency
 
Submitted By: Professor Paul Bardos WhoDoesWhat?      Last update: 09/09/2008

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