Simulation of in situ subsurface biodegradation of polychlorophenols in air-lift percolators.
Air-lift percolator experiments simulated in situ subsurface degradation of 2,4,6-trichlorophenol, 2,3,4,6-tetrachlorophenol and pentachlorophenol, in mixtures and individually, by indigenous microorganisms from a chlorophenol-contaminated aquifer. Inoculation with a chlorophenol(CP)-degrading gram-positive isolate from the CP-contaminated groundwater did not significantly increase CP degradation rates. Feed concentrations of up to 55 mg CP l-1 were degraded. Stable CP degradation was maintained for over 6 months. CP degradation rates up to 54.3 mg l-1 day-1 and effluent concentrations below 40 micrograms CP l-1 were achieved. CP were mineralized as shown by CP reduction, dissolved organic carbon removal and release of inorganic chloride.
Langwaldt
J H
JH
Department of Environmental Technology, Institute of Water and Environmental Engineering, Tampere University of Technology, FIN-33720 Tampere, Finland.
Männistö
M K
MK
Wichmann
R
R
Puhakka
J A
JA
D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002733:Chlorophenols / Q000378:metabolism*; D010416:Pentachlorophenol / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000378:metabolism
D002733:Chlorophenols; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; C031487:2,3,4,6-tetrachlorophenol; D010416:Pentachlorophenol; C024564:2,4,6-trichlorophenol