Substrate Effects on Methanotrophic Trichloroethylene Degradation

by Stuart E. Strand, Univ Washington, Seattle, United States,
Tanya P. Treat, Univ Washington, Seattle, United States,
Steven C. Richards, Univ Washington, Seattle, United States,
H. David Stensel, Univ Washington, Seattle, United States,



Document Type: Proceeding Paper

Part of: Environmental Engineering

Abstract: Formate up to 1g/L had no significant enhancing effect on the degradation of trichloroethylene (TCE) by three mixed enrichments of methane-oxidizing bacteria. Methanol did not enhance TCE degradation, but did inhibit TCE degradation above 100 mg/L. 5-10% methane enhanced TCE degradation, but 20-40% methane inhibited. The addition of formate overcame some of the inhibition by methane. Enrichments grown without copper degraded TCE faster than those grown with copper, but the variations between inocula sources had a greater effect on TCE degradation rate.

Subject Headings: TCE | Chemical degradation | Methane | Bacteria | Copper (chemical) | Substrates | Biological processes

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