Biodegradation of Dichloromethane in Leachateby R. Kerry Rowe, (M.ASCE),
D. Roy Cullimore,
Abstract: The biodegradation of dichioromethane (DCM) in landfill leachate is examined by means of a series of laboratory tests conducted in a controlled environment. These tests demonstrate that degradation of DCM can occur under anaerobic conditions in leachate with half-lives at 24°C and 10°C of the order of 0.5–1.9 days and 2.8–4.7 days respectively following a lag time of 6–9 days and 50-95 days respectively. The paper then discusses a number of field cases where dichioromethane has been observed to experience a significant decrease in concentration in landfill leachate that is attributed to biodegradation with an inferred half-life of 2–5 years.
Subject Headings: Leachates | Biological processes | Landfills | Laboratory tests | Chemical degradation
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