The aim of this study was to determine the methane (CH4) generation factor (k) and CH4 generation potential (L) for bulk waste in order to calibrate a CH4 generation model (USEPA Landgem 3.02) and provide information on the remaining CH4 generation potential in a large (54 ha) municipal solid waste landfill located in a boreal climate. The CH4 generation model was calibrated by actual CH4 recovery and emission measurement data. Moreover, waste characterisation information from a previous study was considered. The appropriate k for bulk waste was 0.18 in the studied landfill, which indicated a higher rate of degradation than proposed by the Intergovernmental Panel on Climate Change as a default k value of 0.09 for wet conditions in boreal and temperate climes, whereas the calibrated L of 100 m3/t was lower than estimated on the basis of a previous waste characterisation study. The results demonstrate the importance of model calibration, as inappropriate model parameters may result in a large discrepancy (approximately 100 % or 119 million m3 having an energy equivalent of nearly 1.2 TWh) in cumulative CH4 generation estimates within a 18-year timescale (2012–30) at the studied landfill.
AminiHRReinhartDR (2011) Regional prediction of long-term landfill gas to energy potential. Waste Management31: 2020–2026.
2.
BaldocchiDD (2003) Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: past, present and future. Global Change Biology9: 479–492.
3.
BarlazMAHamRKSchaeferDM (1989) Mass-balance analysis of anaerobically decomposed refuse. Journal of Environmental Engineering115: 1088–1102.
4.
BensonCHBarlazMALaneDTRaweJM (2007) Practice review of five bioreactor/recirculation landfills. Waste Management27: 13–29.
5.
BlightG (2008) Slope failures in municipal solid waste dumps and landfill: a review. Waste Management & Research26: 448–463.
6.
Council Directive 1999/31/EC (1999) Council Directive 1999/31/EC of 26 April 1999 on the landfill of waste. Official Journal of the European CommunitiesL182: 1–19.
7.
EinolaJSormunenKLensuALeiskallioAEttalaMRintalaJ (2008) Methane oxidation at a surface-sealed boreal landfill. Waste Management29: 2105–2120.
FaourAAReinhartDRYouH (2007) First order kinetic gas generation model parameters for wet landfills. Waste Management27: 946–953.
10.
GargAAchariGJoshiRC (2006) A model to estimate the methane generation rate constant in sanitary landfills using fuzzy synthetic evalution. Waste Management & Research24: 363–375.
11.
IPCC (2006) IPCC guidelines for national greenhouse gas inventories. Volume 5: Waste, Chapter 3, solid waste disposal, p. 40. Intergovernmental panel on climate change, National greenhouse gas inventories programme. Available at: http://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/5_Volume5/V5_3_Ch3_SWDS.pdf (accessed December 2011).
12.
JianguoJYongYShihuiYBinYChangZ (2010) Effects of leachate accumulation on landfill stability in humid regions in china. Waste Management30: 848–855.
13.
JokelaJPYKettunenRHRintalaJA (2002) Methane and leachate pollutant emission potential from various fractions of municipal solid waste (MSW): effect of source separation and aerobic treatment. Waste Management & Research20: 424–433.
14.
LaurilaTTuovinenJ-PLohilaAHatakkaJAurelaMThumT(2005) Measuring methane emissions from a landfill using a cost-effective micrometeorological method. Geophysical Research Letters32: L19808.
15.
LohilaALaurilaTAurelaMThumTTuovinenJ-PPihlatieM. (2007) Micrometeorological measurements of methane and carbon dioxide fluxes at a municipal landfill. Environmental Science and Technology41: 2717–2722.
16.
MachadoSLCarvalhoMFGourcJ-PVilarMdo NascimentoJCF (2009) Methane generation in tropical landfills: Simplified methods and field results. Waste Management29: 153–161.
17.
ScharffHJacobsJ (2006) Applying guidance for methane emission estimation for landfills. Waste Management26: 417–429.
18.
SormunenKEttalaMRintalaJ (2008) Detailed internal characterisation of two Finnish landfills by waste sampling. Waste Management28: 151–163.
19.
SormunenK (2008) Characterisation of landfills for recovery of methane and control of emissions. PhD Thesis, University of Jyväskylä, Finland.
20.
SpokasKBognerJChantonJPMorcetMAranCGraffC. (2006) Methane mass balance at three landfill sites: What is the efficiency of capture by gas collection systems?Waste Management26: 516–525.
21.
TolaymatTMGreenRBHaterGRBarlazMABlackPBronsonDPowellJ (2010) Evaluation of landfill gas decay constant for municipal solid waste landfills operated as bioreactors. Journal of Air and Waste Management Association60: 91–97.
22.
ThompsonSSawyerJBonamRValdiviaJE (2009) Building a better methane generation model: Validating models with methane recovery rates from 35 Canadian landfills. Waste Management29: 2085–2091.
USEPA (United States Environmental Protection Agency) (2005) Landfill gas emission model (Landgem) version 3.0.2 users guide. EPA-600/R-05/047. Available at: http://www.epa.gov/ttn/catc/dir1/landgem-v302-guide.pdf (accessed December 2011).
25.
USEPA (United States Environmental Protection Agency) (2009) Municipal solid waste generation, recycling, and disposal in the United States: facts and figures for 2009. Available at: http://www.epa.gov/wastes/nonhaz/municipal/pubs/msw2009-fs.pdf (accessed June 2011).
26.
YazdaniRKiefferJSananikoneKAugensteinD (2006) Full scale bioreactor landfill for carbon sequestration and greenhouse emission control. Final technical progress report. Available at: http://www.yolocounty.org/index.aspx?page=438 (accessed June 2011).
