Influência do plantio de gramíneas na camada de cobertura de aterro sanitário no fluxo de gases

Abstract

This study was aimed to assess the influence of grass planted in the cover layer of an experimental, conventional solid waste disposal cell on the release of CH4 and CO2 to the atmosphere. The studied grasses (Andropogon, Mombasa, Buffel, Massai and Bermuda) showed a different ability to retain gas emissions (Mombasa: averaging 2.5% CH4 and 5.0% CO2; Massai: 1.9% CH4 and 3.8% CO2; Andropogon: 0.7% CH4 and 1.4% CO2; Bermuda: 0.6% CH4 and 1.1% CO2; Buffel: 0.2 % CH4 and 0.5% CO2). The volumetric and mass flows were also lower in the soil with Mombasa grass and greatest in the soil with Buffel grass. This was related to the main morphogenesis, structural, productive and nutritional features used in the assessment of the survival and development of the different grasses.