Understanding CDM Methodologies - SuSanA
Understanding CDM Methodologies - SuSanA
Understanding CDM Methodologies - SuSanA
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Project boundary<br />
Transport of<br />
Waste included in<br />
Project Boundary<br />
Baseline Scenario:<br />
Decay of Waste<br />
Fresh Waste: Use<br />
First Order Decay<br />
Model<br />
Old Waste in<br />
Landfill<br />
Differentiate<br />
Waste Age and<br />
apply First Order<br />
Decay Model<br />
according to each<br />
Waste Vintage<br />
The spatial extent of the project boundaries includes the project site, the<br />
sites where the organic waste is sourced, the sites where the final residues<br />
produced by the project activity will be deposited and the traveling routes<br />
between these three locations.<br />
Baseline scenario and additionality<br />
In the baseline scenario, it is assumed that the organic waste used by the<br />
project is left to decay within the project boundary, hereby generating<br />
methane emissions.<br />
The barrier analysis can be complemented by other tools, including the latest<br />
version of the “Tool for the demonstration and assessment of additionality”,<br />
may be use in a voluntary basis to enhance the additionality analysis.<br />
Baseline Emissions<br />
Projects combusting freshly generated waste: under this scenario,<br />
projects calculate their baseline emissions at any year “y”, using the amount<br />
and the composition of the waste combusted since the beginning of the<br />
project and the first order decay (FOD) model (see Box 36).<br />
Projects combusting waste that has partially decayed in a disposal<br />
site: This scenario requires that calculation of the yearly methane generation<br />
potential of the waste combusted from the project at any year “y” considers<br />
the age of the waste at the project start. In this case the project proponents<br />
may:<br />
(i)<br />
(ii)<br />
(iii)<br />
stimate the mean age of the waste contained in the disposal site at the<br />
beginning of the project, as the weighted average age of the waste.<br />
These should consider the yearly amount of waste deposited in the<br />
landfill site, from the inception of the site to the year preceding the<br />
beginning of the project.<br />
Calculate the yearly methane generation potential of the SWDS, taking<br />
into account the total amount and composition of waste deposited<br />
since the inception of the site. The methane generation potential of the<br />
waste removed for combustion up to the year “y” will be estimated as<br />
proportional to the mass fraction of that waste, relative to the whole<br />
waste mass in the SWDS.<br />
Estimate the quantity and the age distribution of the waste removed<br />
each year 244 , and calculate the methane generation potential of that<br />
waste in the year “y”.<br />
244<br />
The estimation of the age of the portions of waste being removed from the disposal site and combusted each<br />
year may be done by topographical modelling of the wastes present in the relevant sections of the SWDS. This<br />
approach should include segregation of the wastes into even-age layers or volumetric blocks based on historical<br />
or constructive data (design of the disposal site). Information on quantity, composition, and age may be based<br />
on (a) historical records of the yearly mass and composition of waste deposited in the section of the disposal<br />
site where waste is being removed for combustion; or (b) historical production data for cases in which the<br />
waste at the site is dominated by relatively homogeneous industrial waste material.<br />
99