Title: Design studies before a pilot project on stimulated reductive dechlorination 
Resource Type: document --> technical publication --> report 
Country: Denmark 
Language(s): Danish
Year: 2007 
Availability: Environmental project, Miljørapport nr. 1146 
Author 1/Producer: Jørgensen, T.H. 
Other Authors/Producers: Nielsen, L.; Berger, H.; Scheutz, C.; Jakobsen, R.; Bjerg, P.L.; Durant, N.D.; Cox, E.; Mossing, C.; Jacobsen, C.S. and Rasmussen, P. 
Author / Producer Type: Agency, regulator or other governmental or inter-governmental body 
Publisher: The Danish Environmental Protection Agency, Miljøstyrelsen 
Publisher City: Strandgade 29, DK-1405 Copenhagen K, Denmark 
ISBN: 978-87-7052-362-2 
Report / download web link (=direct link): http://www2.mst.dk/common/Udgivramme/Frame.asp?pg=http://www ...  
Format (e.g. PDF): PDF 
Size: (e.g. 20mb) 6.693 
EUGRIS Keyword(s): Contaminated land-->Remediation options-->In situ treatment technologies
Short description: This technology project examines the applicability of enhanced in-situ reductive dechlorination as a remediation technique at Danish sites contaminated with chlorinated solvents. The preliminary design studies are also intended to determine if the test site can be used in a field pilot demonstration. See report 1149. 
Long description: The results of the investigation show that the site is typical for eastern Denmark and well suited as a test site for enhanced reductive dechlorination. Groundwater concentrations of chlorinated solvents are between 1,000 and 20,000 μg/l. The redox conditions are favourable; the groundwater is reduced with negative redox potential, low oxygen and nitrate contents, moderate to high content of dissolved iron, low content of methane, but moderate sulphate content that needs to be reduced, before dechlorination can be carried out. Dehalococcoides and ethene are present in the intermediate secondary aquifer, which indicates that there is a potential for reductive dechlorination, but no significant biodegradation of cis-DCE and VC is observed. n active system with pumping and reinjection of groundwater can be applied to the intermediate secondary aquifer at a depth interval between 10 - 15 m below surface. The test area corresponds to an area of.20 x. 40 m (approx. 800 m²). Lactate is proposed as the electron donor, but it will be necessary to add a dechlorinating bacterial culture (e.g. KB1TM), if reasonable results are to be achieved within the expected timeframe for the pilot project of approx. 6 months. 
Submitted By: Dr Jacqueline Falkenberg WhoDoesWhat?      Last update: 02/04/2007