Title: Remediation of groundwater contaminated with MTBE in bio reactors with MTBE as the primary substrate. 
Resource Type: document --> technical publication --> report 
Country: Denmark 
Language(s): Danish
Year: 2004 
Availability: Environmental project, Miljørapport nr. 880 
Author 1/Producer: Arvin, A. 
Other Authors/Producers: Albrechtsen, H.J.; Boe-Hansen, R.; Krag, R.; Lindberg,E.; Mosbæk, H.;Nielsen, L.K.; Rivas, I.M. and Tulley, A.G. 
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: 87-7614-066-0 
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) 1.1 
EUGRIS Keyword(s): Contaminated land-->Remediation options-->Remediation options overview
Short description: In Denmark, gas stations are often found to be contaminated by both gasoline hydrocarbons and MTBE (methyl-tert-butyl ether). Since various bacterial cultures can degrade MTBE, biological treatment in a bioreactor is a feasible alternative to traditional treatments and is investigated in this study. 
Long description: Traditional groundwater treatment for contamination with gasoline hydrocarbon has been air stripping or by filtration through activated carbon, but these methods have a limited capacity for removal of MTBE leading to an increase in operational costs. In this project, the potential for biological degradation of MTBE as a primary substrate is studied. Two different bench-scale reactors were designed based on the results from the laboratory experiments: a) a sequencing batch reactor based on a suspended bacterial culture, and b) a biological filter based on an attached bacterial culture. The experiments show, that MTBE is biodegradable under aerobic conditions, where MTBE acts as primary substrate. MTBE could be degraded from high concentrations (mg/L) to a concentration of a few ƒÝg/L in the biological reactor. The experiments show that the degradation could take place at low temperature (10„aC), though the degradation rate was much higher at 20„aC. The growth rate of the MTBE degrading biomass was slow, which means that a significant amount of time is required to start-up a full-scale plant. In addition, the full-scale treatment plant will be vulnerable to operational stops and variations in the MTBE load. 
Submitted By: Dr Jacqueline Falkenberg WhoDoesWhat?      Last update: 11/04/2007