Environmental Engineering Reference
In-Depth Information
emissions avoided from dumping waste at a solid waste disposal site” to award Clean
Development Mechanism (CDM) benefits to a particular landfill closure project.
As per the tool, the amount of methane that is generated each year (
BE
), (t
CH
4
,
SWDS
,
y
CO
2
e) is calculated for each year y, using the following equation:
16
BE
=×- ×
j
(1
f
)
GWP
×-
(1
OX
)
12
××
F
DOC
CH
4,
SWDS y
,
CH
4
f
(3)
y
-
-
× -
åå
k
k
(
y
x
)
MCF
×
W
×
DOC
× -
(1
e
)
×
e
j
j
jx
,
j
x
=
1
j
Where:
Methane emissions avoided during the year y from preventing
waste disposal at the solid waste disposal site (SWDS) during
the period from the start of the project activity to the end of the
year y (tCO
2e
)
BE
=
CH
4
,
SWDS
,
y
φ
=
Model correction factor to account for model uncertainties
Fraction of methane captured at the SWDS and flared,
combusted or used in another manner
f
=
Global Warming Potential (GWP) of methane, valid for the
relevant commitment period
GWP
=
CH
4
Oxidation factor (reflecting the amount of methane from
SWDS that is oxidised in the soil or other material covering
the waste
OX
=
F
=
Fraction of methane in the SWDS gas (volume fraction)
Fraction of degradable organic carbon (DOC) that can
decompose
DOC
=
f
MCF
=
Methane correction factor
Amount of organic waste type j prevented from disposal in the
SWDS in the year x (tons)
W
=
j
,
x
Fraction of degradable organic carbon (by weight) in the waste
type j
DOC
=
j
k
=
Decay rate for the waste type j
j
j
=
Waste type category (index)
Year during the crediting period: x runs from the first year of
the first crediting period (x = 1) to the year y for which
avoided emissions are calculated (x = y)
x
=
y
=
Year for which methane emissions are calculated
1.1. Input Parameters
The input parameters used in the FOD model are more or less similar to the LandGEM
model except that IPCC has attempted to make the projections for methane emissions more
realistic by incorporating various correction factors to the equation.
