ABSTRACT
Accurate CH4 emission estimation from landfills is crucial due to its potent greenhouse gas status. IPCC models have been widely used to estimate landfill CH4 emissions, but their basis in developed country conditions limits their accuracy for India. This investigation modifies the IPCC’s First-Order Decay (FOD) model, highlighting the pivotal role of the decay constant (k) parameter. To improve CH4 estimation accuracy for India, this study adjusts the ‘k’ value by accounting for factors like landfill fires, poor MSW compaction, animal ingestion, temperature, moisture, and waste composition. A relationship had been established for the compactor factor between methane generated and the density of MSW, also CMT method is carried out for the calculation of other factors. The results showed that the IPCC FOD model underestimates the methane emissions, and by incorporating these factors the amount of methane generated is 2.16 times that of the Modified FOD model.
