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Estimation of methane emission rate changes using age-defined waste in a landfill site

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Title: Estimation of methane emission rate changes using age-defined waste in a landfill site
Authors: Ishii, Kazuei Browse this author →KAKEN DB
Furuichi, Toru Browse this author
Keywords: Methane emission
Age-defined wastes
Change in methane generation rate
The first-order decay model
Cold climate region
Issue Date: Sep-2013
Publisher: Pergamon-elsevier science ltd
Journal Title: Waste management
Volume: 33
Issue: 9
Start Page: 1861
End Page: 1869
Publisher DOI: 10.1016/j.wasman.2013.05.011
PMID: 23786989
Abstract: Long term methane emissions from landfill sites are often predicted by first-order decay (FOD) models, in which the default coefficients of the methane generation potential and the methane generation rate given by the Intergovernmental Panel on Climate Change (IPCC) are usually used. However, previous studies have demonstrated the large uncertainty in these coefficients because they are derived from a calibration procedure under ideal steady-state conditions, not actual landfill site conditions. In this study, the coefficients in the FOD model were estimated by a new approach to predict more precise long term methane generation by considering region-specific conditions. In the new approach, age-defined waste samples, which had been under the actual landfill site conditions, were collected in Hokkaido, Japan (in cold region), and the time series data on the age-defined waste sample's methane generation potential was used to estimate the coefficients in the FOD model. The degradation coefficients were 0.050 1/y and 0.062 1/y for paper and food waste, and the methane generation potentials were 214.4 mL/g-wet waste and 126.7 mL/g-wet waste for paper and food waste, respectively. These coefficients were compared with the default coefficients given by the IPCC. Although the degradation coefficient for food waste was smaller than the default value, the other coefficients were within the range of the default coefficients. With these new coefficients to calculate methane generation, the long term methane emissions from the landfill site was estimated at 1.35 x 10(4) m(3)-CH4, which corresponds to approximately 2.53% of the total carbon dioxide emissions in the city (5.34 x 10(5) t-CO2/Y). (C) 2013 Elsevier Ltd. All rights reserved.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 石井 一英

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