Estimation of greenhouse gas emissions from Muhammad wala open dumping site of Faisalabad, Pakistan

Abstract

Landfills and open dumping sites around the world are adding to the global warming issue. This is because of the existence of the main greenhouse gases in landfill gas (LFG); namely, methane (CH4) and carbon dioxide (CO2). The current study was focused on the determination of air emissions from the Muhammad wala dump site. This site was constructed in 1992 and expected to have lifespan of 28 years. Utilizing LandGEM software, the landfill emissions were estimated with taking into consideration the 60% content of methane, the methane generation rate constant of 0.02125 year−1, and methane generation potential capacity constant of 23.25 m3/Mg. The outcomes of this study indicated that the maximum volume of emitted gas is at the next year after the site closure (2021). It was estimated that total volume of LFG, methane, carbon dioxide, and non-methane organic compounds were 2.257 × 10+08, 1.354 × 10+08, 9.026 × 10+07, and 5.416 × 10+05 m3/year, respectively.