Biodegradation of Dichloromethane in Leachate

by R. Kerry Rowe, (M.ASCE),
Leila Hrapovic,
Naim Kosaric,
D. Roy Cullimore,

Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water


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: Biological processes | Leachates | Landfills | Laboratory tests | Chemical degradation | Leaching | Methane | Organic compounds

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