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DOI: https://doi.org/10.4491/eer.2019.074
Applying methane and carbon flow balances for determination of first-order landfill gas model parameters
Jin-Kyu Park1, Yong-Gil Chong2, Kazuo Tameda3, and Nam-Hoon Lee2
1Ecowillplus Co., Ltd., Anyang 14001, Republic of Korea
2Department of Environmental and Energy Engineering, Anyang University, Anyang 14029, Republic of Korea
3Graduate School of Engineering, Fukuoka University, Fukuoka 814-0180, Japan
Corresponding Author: Nam-Hoon Lee ,Tel: +82-31-467-0891, Fax: +82-31-467-0789, Email: nhlee@anyang.ac.kr
Received: February 25, 2019;  Accepted: May 22, 2019.
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ABSTRACT
Landfill gas (LFG) emissions from a given amount of landfill waste depend on the carbon flows in the waste. The objective of this study was to more accurately estimate the first-order decay parameters through methane (CH4) and carbon flow balances based on the analysis of a full-scale landfill with long-term data and detailed field records on LFG and leachate. The carbon storage factor for the case-study landfill was 0.055 g-degradable organic carbon (DOC) stored per g-wet waste and the amounts of DOC lost with the leachate were less than 1.3%. The appropriate CH4 generation rate constant (k) for bulk waste was 0.24 y-1. The the CH4 generation potential (L0) values ranged 33.7-46.7 m3-CH4 Mg-1, based on the fraction of DOC that can decompose (DOCf) value of 0.40. Results show that CH4 and carbon flow balance methods can be used to estimate model parameters appropriately and to predict longterm carbon emissions from landfills.
Keywords: Carbon emissions | First-order decay model | Landfill gas | Leachate | Methane and carbon flow balances
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