Investigating Methods of Estimating and Measuring Methane Emissions in Municipal Solid Waste Landfills: A Systematic Review; [بررسی روش های برآورد و سنجش انتشار گاز متان از محل های دفن پسماند )لندفیل ها(: مطالعه مرور نظام مند]



Hssanabadi M^{1, 2} ; Hassanvand MS^{1, 2} ; Khanizadeh M¹ ; Faridi S^{1, 2} ; Mokammel A¹ ; Esfahani BM¹ ; Orkomi AA³ ; Momeniha F^{1, 4} Show Affiliations
Source: Iranian Journal of Health and Environment Published:2024

Abstract

Background and Objective: The initial step in managing methane emissions is quantification. This study aims to comprehensively investigate the methods for estimating and measuring methane gas emissions in municipal solid waste landfills. Materials and Methods: This systematic review includes studies published in English and Farsi between January 2005 and May 2023. English-language articles were included from PubMed, Web of Science, and Scopus databases, while Persian-language articles were included from SID, Majiran and Google Scholar. Results: After evaluating the studies, 90 studies providing information on methods for measuring and estimating methane gas emissions in urban landfills were selected. The results showed that emission estimates based on widely used models like LandGEM and IPCC, despite being lower in cost and providing faster results, are often associated with relatively high uncertainty. Therefore, quantitative and qualitative methods of direct measurement are preferred for accurately determining methane emissions from landfills. The most commonly used methods for measuring greenhouse gases, especially methane from landfills, include direct reading equipment and closed flux determination chambers. Conclusion: Estimating greenhouse gas emissions from primary sources allows responsible authorities to understand the current status of methane emissions and to formulate reduction strategies. The findings of estimated methane emissions from landfills can differ significantly from the actual measurements in some situations. Therefore, while these estimation methods are useful, fast and cost-effective tools, their inherent uncertainties should be considered when using them. © 2024 Iranian Association of Environmental Health, and Tehran University of Medical Sciences.