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Greenhouse gas reporting data improves understanding of regional climate impact on landfill methane production and collection

PloS one, 2021-02, Vol.16 (2), p.e0246334-e0246334 [Peer Reviewed Journal]

COPYRIGHT 2021 Public Library of Science ;COPYRIGHT 2021 Public Library of Science ;This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication: https://creativecommons.org/publicdomain/zero/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/journal.pone.0246334 ;PMID: 33635880

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Title:
Greenhouse gas reporting data improves understanding of regional climate impact on landfill methane production and collection
Author: Jain, Pradeep ; Wally, James ; Townsend, Timothy G ; Krause, Max ; Tolaymat, Thabet
Xu, Yangyang
Subjects: Biodegradation ; Carbon dioxide ; Climate change ; Control systems ; Decay ; Decay rate ; Earth Sciences ; Ecology and Environmental Sciences ; Emission analysis ; Emission inventories ; Emissions ; Environmental aspects ; Environmental conditions ; Environmental monitoring ; Environmental protection ; Federal regulations ; Greenhouse effect ; Greenhouse gases ; Laboratories ; Landfill ; Landfill gas ; Landfill gases ; Landfills ; Methane ; Methane generation ; Methane production ; Municipal landfills ; Municipal solid waste ; Municipal waste management ; People and places ; Physical Sciences ; R&D ; Regional climates ; Regional development ; Research & development ; Research and Analysis Methods ; Solid waste management ; Statistics ; Waste disposal sites
Is Part Of: PloS one, 2021-02, Vol.16 (2), p.e0246334-e0246334
Description: A critical examination of the US Environmental Protection Agency's (US EPA's) Greenhouse Gas Reporting Program (GHGRP) database provided an opportunity for the largest evaluation to date of landfilled waste decomposition kinetics with respect to different US climate regimes. In this paper, 5-8 years of annual methane collection data from 114 closed landfills located in 29 states were used to estimate site-specific waste decay rates (k) and methane collection potentials (Lc). These sites account for approximately 9% of all landfills required to report GHG emissions to the US EPA annually. The mean methane collection potential (Lc) for the sites located in regions with less than 635 mm (25 in) annual rainfall was significantly (p<0.002) lower than the mean methane collection potential of the sites located in regions with more than 635 mm (25 in) annual precipitation (49 and 73 m3 methane Mg-1 waste, respectively). This finding suggests that a fraction of the in-place biodegradable waste may not be decomposing, potentially due to a lack of adequate moisture content of landfills located in arid regions. The results of this evaluation offer insight that challenges assumptions of the traditional landfill methane estimation approach, especially in arid climates, that all methane corresponding to the total methane generation potential of the buried solid waste will be produced. Decay rates showed a significant correlation with annual precipitation, with an average k of 0.043 year-1 for arid regions (< 508 mm (20 in) year-1), 0.074 year-1 for regions with 508-1,016 mm (20-40 in) annual precipitation, and 0.09 year-1 in wet regions (> 1,016 mm (40 in) year-1). The data suggest that waste is decaying faster than the model default values, which in turn suggests that a larger fraction of methane is produced during a landfill's operating life (relative to post-closure).
Publisher: United States: Public Library of Science
Language: English
Identifier: ISSN: 1932-6203
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0246334
PMID: 33635880
Source: Public Library of Science website
Geneva Foundation Free Medical Journals at publisher websites
PubMed Central
ProQuest Central
DOAJ Directory of Open Access Journals

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Greenhouse gas reporting data improves understanding of regional climate impact on landfill methane production and collection

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