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  • Title: Biodegradation of tetrachlorothylene using methanol as co-metabolic substrate.
    Author: Yang Q, Shang HT, Li HD, Xi HB, Wang JL.
    Journal: Biomed Environ Sci; 2008 Apr; 21(2):98-102. PubMed ID: 18548847.
    Abstract:
    OBJECTIVE: To investigate the biodegradation of tetrachloroethylene (PCE) using methanol as electron donor by acclimated anaerobic sludge. METHODS: HP-6890 gas chromatograph (GC), together with HP-7694 autosampler, was used to analyze the concentration of PCE and intermediates. RESULTS: PCE could be decholrinated reductively to DCE via TCE, and probably further to VC and ethylene. The degradation of PCE and TCE conformed to first-order reaction kinetics. The reaction rate constants were 0.8991 d(-1) and 0.068 d(-1), respectively, and the corresponding half-life were 0.77 d and 10.19 d, respectively. TCE production rate constant was 0.1333 d(-1), showing that PCE was degraded more rapidly than TCE. CONCLUSION: Methanol is an electron donor suitable for PCE degradation and the cometabolic electron donors are not limiting factors for PCE degradation.
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