Trichloroethylene degradation in a coupled anaerobic/aerobic reactor oxygenated using hydrogen peroxide.
In this work, trichloroethylene (TCE) degradation under combined anaerobic-aerobic conditions was studied in an ethanol-fed biofilm reactor oxygenated using hydrogen peroxide. The reactor was inoculated with a biomass originating from an anaerobic digestor. Granulated peat was added to the reactor as a substratum for biofilm development. Extensive characterization of reactor populations using activity tests and PCR analysis revealed the development of a mutualistic consortium, particularly methanotrophic and methanogenic microorganisms. This consortium was shown to degrade TCE by a combination of reductive and oxidative pathways. A near complete degradation of TCE at a load of 18 mg L(R)(-1) day(-1) was evidenced by a stoichiometric release of inorganic chloride.
Tartakovsky
B
B
Biotechnology Research Institute, NRC, 6100 Royalmount Avenue, Montreal, Quebec, Canada H4P 2A2.
Manuel
M F
MF
Guiot
S R
SR
D001420:Bacteria, Aerobic; D001421:Bacteria, Anaerobic; D018441:Biofilms; D019149:Bioreactors; D006861:Hydrogen Peroxide / Q000737:chemistry; D016877:Oxidants / Q000737:chemistry; D012997:Solvents / Q000378:metabolism*; D014241:Trichloroethylene / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*
D016877:Oxidants; D012997:Solvents; D014241:Trichloroethylene; D006861:Hydrogen Peroxide