Pheakdey, D.V.; Noudeng, V.; Xuan, T.D. Landfill Biogas Recovery and Its Contribution to Greenhouse Gas Mitigation. Energies2023, 16, 4689.
Pheakdey, D.V.; Noudeng, V.; Xuan, T.D. Landfill Biogas Recovery and Its Contribution to Greenhouse Gas Mitigation. Energies 2023, 16, 4689.
Pheakdey, D.V.; Noudeng, V.; Xuan, T.D. Landfill Biogas Recovery and Its Contribution to Greenhouse Gas Mitigation. Energies2023, 16, 4689.
Pheakdey, D.V.; Noudeng, V.; Xuan, T.D. Landfill Biogas Recovery and Its Contribution to Greenhouse Gas Mitigation. Energies 2023, 16, 4689.
Abstract
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 the impact of fugitive CH4 emissions and operation processes in four landfilling scenarios: simple dumping (S1), improved management with leachate treatment (S2), engineered landfill with flaring (S3), and engineered landfill with energy recovery (S4). The study also considered the environmental benefits of carbon sequestration and landfill gas utilization. The LandGEM and IPCC FOD models were used to calculate CH4 generation over the period of 2009-2022, and it was found that approximately 18 and 21 M kg/year of CH4 are released, respectively. The energy potential from CH4 recovery was 51–61 GWh/year. Overall GHG emissions in S2 were the highest, amounting to 409–509 M kg CO2-eq/year, while S1 had lower emissions at 397–496 M kg CO2-eq/year. Flaring captured CH4 in S3 could reduce GHG emissions by at least 55%, and using captured CH4 for electricity production in S4 could mitigate at least 83% of GHG emissions. Electricity recovery (S4) could avoid significant amounts of GHG emissions (˗104.5 kg CO2-eq/tMSW). The study suggests that landfill gas-to-energy could significantly reduce GHG emissions.
Environmental and Earth Sciences, Waste Management and Disposal
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
