Potential waste minimization of trichloroethylene and perchloroethylene via aerobic biodegradation.
Trichloroethylene (TCE) and perchloroethylene (PCE) are two of the most frequently detected chlorinated organics found in groundwater. Biodegradation with a new aerobic consortium was used to ascertain the viability of bioremediation for waste minimization applications. After 1 week of treatment, the degradation rate constants, k, were between 0.004 and 0.012 d(-1) for initial concentrations of 54-664 microM TCE. When PCE was used as the sole contaminant, the k values were approximately 0.01 d(-1) regardless of the initial concentration. The addition of 0.2 microM toluene or phenol as an inducer dramatically increased TCE degradation. For instance, at 200 microM TCE the k value when toluene was added (0.03 d(-1)) was 2.2 times higher than without inducers (0.009 d(-1)). The addition of 0.2 microM phenol increased the rate constant by 58%. However, PCE degradation rates were not changed significantly.
Wang
Jian
J
Department of Civil Engineering, The University of Akron, Akron, Ohio 44325-3905, USA.
Cutright
Teresa J
TJ
D001420:Bacteria, Aerobic; D001673:Biodegradation, Environmental; D012989:Soil Pollutants / Q000378:metabolism; D012997:Solvents / Q000378:metabolism*; D013750:Tetrachloroethylene / Q000378:metabolism*; D014241:Trichloroethylene / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000378:metabolism
D012989:Soil Pollutants; D012997:Solvents; D014873:Water Pollutants; D014241:Trichloroethylene; D013750:Tetrachloroethylene