Landfill Biogas Recovery and Its Contribution to Greenhouse Gas Mitigation

This study assesses the biomethane (CH4) generation and greenhouse gas (GHG) emissions resulting from municipal solid waste landfilling in Phnom Penh, Cambodia, with a focus on impact of fugitive CH4 operation processes four scenarios: simple dumping (S1), improved management leachate treatment (S2), engineered landfill flaring (S3), energy recovery (S4). The also considered environmental benefits carbon sequestration utilization. LandGEM IPCC FOD models were used to calculate over period 2009–2022, it was found that approximately 18 21 M kg/year released, respectively. potential 51–61 GWh/year. Overall, GHG S2 highest, amounting 409–509 kg CO2-eq/year, while S1 had lower at 397–496 CO2-eq/year. Flaring-captured S3 could reduce by least 55%, using captured for electricity production S4 mitigate 83% emissions. Electricity (S4) avoid significant amounts (−52 −63 CO2-eq/tMSW). suggests gas-to-energy significantly