Spatiotemporal investigation of near-surface CH4 and factors influencing CH4 over South, East, and Southeast Asia

Khaliq, Muhammad Athar; Mustafa, Farhan; Rehman, Shafeeq Ur; Shahzaman, Muhammad; Javed, Zeeshan; Sagir, Muhammad; Bashir, Safdar; Zuo, Hongchao

doi:10.1016/j.scitotenv.2024.171311

Cited by 2 publications

(1 citation statement)

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“…A similar positive correlation between humidity and methane content was demonstrated by Javadinejad et al (2019) [78]. A different negative correlation between humidity and methane content was presented by Khaliq et al (2024) [80]. According to Ruoso et al [81], the main factors influencing biodegradation are humidity and the organic carbon fraction content.…”

Section: Discussion Of the Resultssupporting

confidence: 62%

Evaluation of the Activity of a Municipal Waste Landfill Site in the Operational and Non-Operational Sectors Based on Landfill Gas Productivity

Przydatek,

Generowicz,

Kanownik

2024

Energies

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This research identifies the productivity of landfill gas actively captured at a municipal waste landfill site with a waste mass exceeding 1 million Mg from sectors in the operational and non-operational phases, considering meteorological conditions. Based on the analysis of landfill gas, including emissions and composition (CH4, CO2, O2, and other gases), the processes occurring demonstrate the impact of the decomposition of deposited waste on the activity of the deposit. With average monthly gas emissions exceeding 960,000 m3, the average content of CH4 (30–63%) and CO2 (18–42%) and the varied content of O2 (0.3–9.8%) in individual sectors of the landfill site were significant. The statistically significant relationship between CH4, CO2, and landfill gas emissions exhibited a noticeable decrease in methane content. Despite the abandonment of waste storage, a high correlation is present between the emission level and methane content (0.59) and carbon dioxide (0.50). In the operational part of the landfill, this relationship is also statistically significant but to a lesser extent; Spearman’s R-value was 0.42 for methane and 0.36 for carbon dioxide. The operational and post-operational phases of the municipal waste landfill demonstrated a noticeable impact from the amount of precipitation, relative humidity, and air temperature, on landfill gas productivity. The generally progressive decline in the activity of the waste deposit, which reflects a decreasing trend in the methane content of approximately 2% annually in the total composition of landfill gas, as well as the share below 50%, indicates the need only to utilise landfill without producing energy.

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