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Climate impacts of landfill gas emissions: Analysis for 20-year and 100-year time horizons.
Manheim, Derek C; Yesiller, Nazli; Hanson, James L; Blake, Donald R.
Afiliación
  • Manheim DC; Global Waste Research Institute, California Polytechnic State University, San Luis Obispo, CA, 93407, USA; Civil and Environmental Engineering Department, California Polytechnic State University, San Luis Obispo, CA, 93407, USA. Electronic address: dmanheim@calpoly.edu.
  • Yesiller N; Global Waste Research Institute, California Polytechnic State University, San Luis Obispo, CA, 93407, USA.
  • Hanson JL; Civil and Environmental Engineering Department, California Polytechnic State University, San Luis Obispo, CA, 93407, USA.
  • Blake DR; Department of Chemistry, University of California-Irvine, Irvine, CA, 92697, USA.
Waste Manag ; 186: 318-330, 2024 Sep 15.
Article en En | MEDLINE | ID: mdl-38954923
ABSTRACT
Climate impacts of landfill gas emissions were investigated for 20- and 100-year time horizons to identify the effects of atmospheric lifetimes of short- and long-lived drivers. Direct and indirect climate impacts were determined for methane and 79 trace species. The impacts were quantified using global warming potential, GWP (direct and indirect); atmospheric degradation (direct); tropospheric ozone forming potential (indirect); secondary aerosol forming potential (indirect) and stratospheric ozone depleting potential (indirect). Effects of cover characteristics, landfill operational conditions, and season on emissions were assessed. Analysis was conducted at five operating municipal solid waste landfills in California, which collectively contained 13% of the waste in place in the state. Climate impacts were determined to be primarily due to direct emissions (99.5 to 115%) with indirect emissions contributing -15 to 0.5%. Methane emissions were 35 to 99% of the total emissions and the remainder mainly greenhouse gases (hydro)chlorofluorocarbons (up to 42% of total emissions) and nitrous oxide. Cover types affected emissions, where the highest emissions were generally from intermediate covers with the largest relative landfill surface areas. Landfill-specific direct emissions varied between 683 and 103,411 and between 381 and 37,925 Mg CO2-eq./yr for 20- and 100-yr time horizons, respectively. Total emissions (direct + indirect) were 680 to 103,600 (20-yr) and were 374 to 38,108 (100-yr) Mg CO2-eq./yr. Analysis time horizon significantly affected emissions. The 20-yr direct and total emissions were consistently higher than the 100-yr emissions by up to 2.5 times. Detailed analysis of time-dependent climate effects can inform strategies to mitigate climate change impacts of landfill gas emissions.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Monitoreo del Ambiente / Contaminantes Atmosféricos / Instalaciones de Eliminación de Residuos / Metano País/Región como asunto: America do norte Idioma: En Revista: Waste Manag Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Monitoreo del Ambiente / Contaminantes Atmosféricos / Instalaciones de Eliminación de Residuos / Metano País/Región como asunto: America do norte Idioma: En Revista: Waste Manag Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos