Biotic methane oxidationnext term within an instrumented experimental landfill cover

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Journal titleEcological Engineering
Pages102109; # of pages: 8
SubjectBacteria; env; Methane; methanotrophic bacteria; Oxygen; Precipitation; Temperature
AbstractAn experimental landfill cover composed of a mixture of sand and compost was installed at the St-Nic�phore landfill in Qu�bec (Canada). The mixture was evaluated as a potential substrate to promote methane (CH4) oxidation by methanotrophic bacteria. One of the objectives of this field project was to assess the efficiency of the cover in reducing CH4 emissions. For this, both CH4 abatement and the extent to which methanotrophic bacteria developed were followed over time and space in relation to environmental and physico-chemical variables. The results obtained during the first 4 months of monitoring indicated that precipitation and air temperature had a great impact on CH4 oxidation. Over the study period, different patterns in CH4 oxidation through the cover soil were observed; in certain cases, oxidation was observed at various depths, although the zone of optimum oxidation occurred mostly near the surface. However, in the second half of the monitoring period, almost no oxidation was observed at depths greater than 10-cm, presumably because of lack of oxygen at deeper zones within the cover. In the 0�10-cm zone, high numbers and large variability of particulate methane monooxygenase gene (pmoA) copy number were also observed. It is concluded that the adopted substrate has proved to be satisfactory in sustaining and promoting growth of methanotrophic bacteria.
Publication date
AffiliationNRC Biotechnology Research Institute; National Research Council Canada
Peer reviewedNo
NRC number49930
NPARC number3539772
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Record identifier9d01735a-ad80-4cce-a108-af8b340ba11a
Record created2009-03-01
Record modified2016-05-09
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