Landfill Biogas Recovery and Its Contribution to Greenhouse Gas Mitigation

Dek Vimean Pheakdey, Vongdala Noudeng and Tran Dang Xuan ()
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Dek Vimean Pheakdey: Graduate School of Advanced Science and Engineering, Hiroshima University, 1-5-1 Kagamiyama, Higashi-Hiroshima 739-8529, Japan
Vongdala Noudeng: Graduate School of Advanced Science and Engineering, Hiroshima University, 1-5-1 Kagamiyama, Higashi-Hiroshima 739-8529, Japan
Tran Dang Xuan: Graduate School of Advanced Science and Engineering, Hiroshima University, 1-5-1 Kagamiyama, Higashi-Hiroshima 739-8529, Japan

Energies, 2023, vol. 16, issue 12, 1-19

Abstract: This study assesses the biomethane (CH 4 ) generation and greenhouse gas (GHG) emissions resulting from municipal solid waste landfilling in Phnom Penh, Cambodia, with a focus on the impact of fugitive CH 4 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 CH 4 generation over the period of 2009–2022, and it was found that approximately 18 and 21 M kg/year of CH 4 were released, respectively. The energy potential from CH 4 recovery was 51–61 GWh/year. Overall, GHG emissions in S2 were the highest, amounting to 409–509 M kg CO 2 -eq/year, while S1 had lower emissions at 397–496 M kg CO 2 -eq/year. Flaring-captured CH 4 in S3 could reduce GHG emissions by at least 55%, and using captured CH 4 for electricity production in S4 could mitigate at least 83% of GHG emissions. Electricity recovery (S4) could avoid significant amounts of GHG emissions (−52 to −63 kg CO 2 -eq/tMSW). The study suggests that landfill gas-to-energy could significantly reduce GHG emissions.

Keywords: carbon sequestration; emission; greenhouse gas; landfill gas; methane; municipal solid waste; Phnom Penh (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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