Application of linear and non-linear methods in estimating fugitive emissions by using flux chamber at the Jockey Club Controlled Landfill in Brasília/DF

Aplicação dos métodos linear e não linear na estimativa de emissões fugitivas utilizando placa de fluxo no Aterro Controlado do Jockey Club em Brasília/DF

ABSTRACT

The Landfill Gas (LFG) generated in municipal solid waste (MSW) landfills consists of the main greenhouse gases such as methane (CH₄) and carbon dioxide (CO₂). Cover layer systems of sanitary landfills are designed to mitigate the LFG emission into the atmosphere and control water infiltration. Thus, this research aims to quantify and evaluate CH₄ and CO₂ accurate emissions in the final cover layer system at the Jockey Club Controlled Landfill in Brasília (ACJC) by using the static flux chamber. The emission results were estimated by adjusting the concentration data obtained in 12 tests in the cover layer by the methods of Linear Regression (LR) and the Non-Steady-State Diffusion Flux Estimator (NDFE). Fugitive emissions ranged from 0 to 685.6 g CH₄ m^-2 day^-1 and 0 to 1,563.94 g CO₂ m^-2 day^-1 using the LR method. Using the NDFE method, emissions up to 4.2 and 2.5 times greater than the LR method were estimated for CH₄ and CO₂, respectively.

Keywords:
Gas transport; Methane oxidation; Sanitary landfill; Static flux chamber; Cover layer