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Methanotrophic cometabolism of trichloroethylene (TCE) in a two stage bioreactor system

Authors
Journal
Water Research
0043-1354
Publisher
Elsevier
Publication Date
Volume
26
Issue
2
Identifiers
DOI: 10.1016/0043-1354(92)90227-u
Keywords
  • Trichloroethylene
  • Methane Monooxygenase
  • Reducing Equivalents
  • Formate

Abstract

Abstract Competitive inhibition of trichloroethylene (TCE) removal by a mixed methanotrophic consortia was minimized by using a two stage bioreactor system supplied with sodium formate as reducing equivalents. A maximum TCE removal rate of 21.1 mg TCE per g volatile solids per day was observed when the influent formate concentration was 20 mM during continuous methane addition. Termination of methane while maintaining the same formate loading resulted in a TCE removal rate of 25.5 mg TCE per g volatile solids per day suggesting that methane competitively inhibits TCE removal. Formate serves as a noncompetitive substrate for methane monooxygenase system which is responsible for TCE removal.

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