Atmospheric environment

Minimizing N2O fluxes from full-scale municipal solid waste landfill withproperly selected cover soil


ZHANG Houhu , HE Pinjing , SHAO Liming , QU Xian , LEE Duujong

DOI:

Received April 09, 2007,Revised May 31, 2007, Accepted , Available online

Volume 20,2008,Pages 189-194

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Municipal solid waste landfills emit nitrous oxide (N2O) gas. Assuming that the soil cover is the primary N2O source from landfills, this study tested, during a four-year project, the hypothesis that the proper use of chosen soils with fine texture minimizes N2O emissions. A full-scale sanitary landfill, a full-scale bioreactor landfill and a cell planted with Nerium indicum or Festuca arundinacea Schreb, at the Hangzhou Tianziling landfill in Hangzhou City were the test sites. The N2O emission rates from all test sites were considerably lower than those reported in the published reports. Specifically, the N2O emission rate was dependent on soil water content and nitrate concentrations in the cover soil. The e ects of leachate recirculation and irrigation were minimal. Properly chosen cover soils applied to the landfills reduced N2O flux.

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