Biodegradation of phenanthrene in soil-slurry systems with different mass transfer regimes and soil contents.
The effect of soil contents and mass transfer rates on soil bioremediation was investigated. Phenanthrene, a 3-ring polycyclic aromatic hydrocarbon (PAH), was chosen as a model target compound. The biodegradation tests were performed in soil-slurry systems at two distinct mass transfer rates: fast in flasks tests at 150 rpm and slow in roller-bottle tests at 2 rpm. The rate of phenanthrene biodegradation was similar at low soil content (2 wt.%) in both slurry systems, but the rates at high soil contents (6 and 18 wt.%) were higher in the roller-bottle tests. The maximum utilization rate constant for sorbed-phase biodegradation obtained from curve fitting using a mathematical model was decreased in the flask tests with increasing soil content, while not decreased in the roller-bottle tests.
Woo
Seung H
SH
Department of Chemical Engineering, Hanbat National University, San 16-1, Dukmyung-Dong, Yuseong-Gu, Daejeon 305-719, Republic of Korea. shwoo@hanbat.ac.kr
Lee
Min W
MW
Park
Jong M
JM
D000327:Adsorption; D001673:Biodegradation, Environmental; D019149:Bioreactors; D003198:Computer Simulation; D007700:Kinetics; D008433:Mathematics; D008954:Models, Biological; D010616:Phenanthrenes / Q000032:analysis* / Q000378:metabolism*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism*
D010616:Phenanthrenes; D012989:Soil Pollutants; C031181:phenanthrene