Abstract
Aerobic luidized-bed treatment was employed for psychrotrophic bioremediation of chlorophenol-contaminated groundwater. Laboratory-scale, continuous-low reactors were inoculated with nonacclimated activated sludge, the groundwater was amended with inorganic nutrients and a phosphate buffer, and continuous groundwater feed was started at 14-17 o C. Chlorophenol concentrations (in mg/L) in groundwater were as follows: 7-11 for 2,4,6-trichlorophenol, 32-36 for 2,3,4,6-tetrachlorophenol, and 1.8-2.3 for pentachlorophenol. After the startup period, the treatment temperature was gradually decreased to the ambient groundwater temperature (7 o C) and further to 4 o C
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