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KMID : 1094719990040020151
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Biotechnology and Bioprocess Engineering
1999 Volume.4 No. 2 p.151 ~ p.151
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Electrokinetic transport of an NAPL-degrading microorganism through sandy soil bed
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Lee Hyo-Sang
Jahng Deok-Jin
Lee Ki-Say
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Abstract
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The use of electrokinetic injection and transport for the distribution of NAPL-degradingCandida lipolytica CL180 in a sandy soil bed was studied. After the injection of the cell into cathodic side of the bed, an electric current was applied. The strain CL180 exhibited unidirectional movement towards anode in the presence of an electric current, implying that CL180 has a negative surface charge. There existed a lag time during which there was no observed cell transport. After a lag time for transport initiation, cell population decreased in the section near to cathode and increased in the middle and anode sections. When the magnitude of applied electric current increased, the lag time for transport initiation and the time for maximum population at the center of the bed were both shortened. The average electrokinetic mobility was estimated as 0.0188-0.0225 cm2/h·V. Electrokinetic transport rate of CL180 increased proportionally to the applied electric current.
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KEYWORD
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electrokinetic remediation, bioremediation, cell transport, Candida lipolytica
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