DEVELOPMENT OF A LANDFILL GAS RISK ASSESSMENT MODEL: GASSIM

摘要

The emissions of bulk and trace gases from landfills created either directly from waste decomposition or from me combustion of landfill gas (LFG) during flaring and/or gas utilisation, have the potential to: 1. impact the global atmosphere by ozone depletion and global warming; 2. impact the local environment by odour and vegetation stress; and 3. expose humans to trace concentrations of LFG components and combustion products. The risk of these processes occurring is normally assessed using a mixture of experience, calculation and computer models. GasSim assesses the risk of these processes and the magnitude of the impacts and considers the uncertainty in processes, models and parameters, using a Monte Carlo Simulation. GasSim aids LFG risk assessment, enables the processes of LFG generation, emissions, migration/dispersion and impact / exposure to be assessed in a reproducible manner by those familiar with the subject but without the need to build multiple models.