Estimating the volume of methane and carbon dioxide that is generated

2 Estimating the volume of methane and carbon dioxide that is generated 

T = time in years during which waste has been placed. 

Thus MT = total quantity of biodegradable waste placed over lifetime of landfill. 

A more accurate estimation of landfill gas generation rates and the changes over time can be developed using the GasSim computer program developed by the Environment Agency (see Eigure 4.3). This uses a first-order kinetic model 

= rate constant (yr ) (0.185, fast 0.100, medium 0.030, slow) t = time since deposit (yr) 

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