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KMID : 0893319910060030149
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Journal of Environmental Toxicology
1991 Volume.6 No. 3 p.149 ~ p.154
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Effects of Electron Acceptor and Electron Donor on Biodegradation of by Biofilms
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Bae Woo-Keun
Bruce E. Rittmann
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Abstract
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Biodegradation of carbon tetrachloride (CTC) in denitrifying and aerobic columns was investigated under various conditions of electron-acceptor and electron-donor availability. CTC removal increased when the electron-acceptor (nitrate) injection was stopped in the denitrifying column; however, CTC remova1 decreased when electron donor (acetate) was deleted in the denitrifying and the aerobic column. Small fractions of the CTC removed appeared as chloroform, indicating that reductive dechlorination of CTC was occurring. The results from the denitrifying column support the hypothesis that CTC behaves as an electron acceptor that competes for the pool of available electrons inside the bacterial cells.
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