Developing a landfill gas model

A landfill gas generation model is a tool that provides an estimation of generated methane or total landfill gas volume over time from a particular volume of waste, The purpose of a model is to describe in simple terms the complex changes during decomposition of waste in a landfill, For a model to accurately reflect the processes within a landfill, it must take into account the complex nature of the microbiological decomposition of waste within a landfill, the nature of the landfill itself and the ability of gases and liquids to move through the landfill. It should describe the condition of a landfill over time and space in respect of all significant parameters, components and climatic measures, A model needs to replicate generation and movement of gases over time and space, Therefore a component model is required to adequately predict the landfill processes, These models also need to be validated with sufficient full-scale data to give confidence in their application.