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(7) CEF ther,BL,y CO 2 emissions intensity of the fuel used by boiler to generate thermal energy which
is displaced by LFG based thermal energy generation, estimated as per ACM0001
(tCO 2 e/TJ)
4.5 Methods for the ex ante estimation of MD project,y
Project proponents should provide an ex ante estimate of emissions reductions, by projecting the
future GHG emissions of the landfill in the CDM-PDD. ACM0001 specifies a tool to estimate this.
The ex ante estimation of MDproject,y, the amount of methane that would have been destroyed/
combusted during the year (tCH 4 ), will be done with the “Tool to determine methane emissions
avoided from dumping waste at a solid waste disposal site” (Version 02) [EB35, Annex 10], considering
the following additional equation:
MD project,y = BE CH4,SWDS,y / GWP CH4
The quantity of methane projected to be formed during a given year is estimated using a first order
decay (FOD) model based on the discrete time estimate method proposed in the IPCC Guidelines 20 .
All of the example PDDs adopted the FOD model for ex ante estimation of methane generation
potential. BE CH4,SWDS,y , the amount of methane generated from the landfill in the absence of the project
activity at year y (tCO 2 e), is calculated as follows:
16
BE CH4,SWDS,y = ϕ • (1 – f ) • GWP CH4 • (1 – OX) • • F • DOC f • MCF
12
y
• Σ Σ W j,x • DOC j • e –k • (y–x) • (1 – e –k j )
where:
φ Model correction factor to account for model uncertainties (Value 0.9)
f Fraction of methane captured at the landfill site and flared, combusted or used in another manner
F Fraction of methane in the landfill gas (volume fraction) (Default value 0.5)
DOC j Fraction of degradable organic carbon (DOC) (by weight) in the waste type j (Refer to Table A-9 for values)
DOC f Fraction of degradable organic carbon (DOC) that can decompose (Default value 0.5)
MCF Methane correction factor (Refer to Table A-10 for values)
GWP CH4 Global warming potential of methane (Value 21, for the first commitment period of the Kyoto Protocol)
OX Oxidation factor (0.1 for managed landfills and 0 for other types of landfills)
W j,x
k j
j
x
y
Amount of organic waste type j prevented from landfilled in the year x (tonnes)
Decay rate for the waste stream type j (Refer to Table A-11 for values)
Waste type category
Year during the crediting period: x runs from the first year of the first crediting period (x=1) to the year for which
avoided emissions are calculated (x=y)
Year for which methane emissions are calculated
x = 1
j
Table A-9 DOC j values for the different waste types j
Waste type j
DOC j
(% wet waste)
DOC j
(% dry waste)
Wood and wood products 43 50
Pulp, paper and cardboard (other than sludge) 40 44
Food, food waste, beverages and tobacco (other than sludge) 15 38
Textiles 24 30
Garden, yard and park waste 20 49
Glass, plastic, metal, other inert waste 0 0
Source: Adapted from IPCC 2006 Guidelines for National Greenhouse Gas Inventories, Volume 5: Waste, Tables 2.4 and 2.5 (IPCC
2006).
20 IPCC 2006 Guidelines for National Greenhouse Gas Inventories, Volume 5: Waste (IPCC, 2006)
107