Denmark's National Inventory Report 2005 - Submitted under the ...

Table 8.8. Amounts of waste and CH 4 emissions for 1990-2003.
Year Dome- Bulky Garden Com- Indu- Building Sludge Ash & Waste Potential Annual Biogas Annual
stic Waste Waste mercial strial & cons- slag emission emission collected net
Waste & office Waste truction
Waste Waste Total emission
kt
kt kt CH4 kt CH4 kt CH4 kt CH4
1990 198,9 250,7 85,2 109,3 822,4 951,4 222,1 535,0 3175,1 85,2 64,0 0,5 63,5
1991 198,7 259,0 70,7 120,0 824,3 804,3 193,3 562,0 3032,3 83,7 65,3 0,7 64,6
1992 198,4 267,3 56,1 130,7 826,2 657,2 164,6 589,0 2889,6 82,2 66,5 1,4 65,1
1993 198,2 275,7 41,6 141,3 828,1 510,1 135,8 616,0 2746,8 80,7 67,4 1,7 65,7
1994 198,0 284,0 27,0 152,0 830,0 363,0 107,0 643,0 2604,0 79,2 68,2 4,6 63,6
1995 190,0 286,0 17,0 128,0 779,0 321,0 101,0 135,0 1957,0 74,7 68,7 7,4 61,2
1996 132,0 275,0 6,0 135,0 822,0 317,0 117,0 703,0 2507,0 71,4 68,8 8,2 60,7
1997 83,0 248,0 6,0 170,0 707,0 264,0 130,0 475,0 2083,0 65,9 68,6 11,1 57,5
1998 98,0 234,0 20,0 161,0 746,0 266,0 124,0 210,0 1859,0 66,3 68,5 13,2 55,3
1999 117,0 239,0 3,0 164,0 582,0 224,0 126,0 12,0 1467,0 63,5 68,2 11,5 56,7
2000 85,0 264,0 7,0 152,0 611,0 269,0 94,0 0,0 1482,0 62,5 67,8 11,0 56,8
2001 50,0 180,0 3,0 150,0 583,0 260,0 64,0 10,0 1300,0 49,9 66,6 10,0 56,6
2002 37,0 161,0 4,0 137,0 520,0 229,0 48,0 38,0 1174,0 43,9 65,1 10,0 55,1
2003 24,0 143,0 4,0 131,0 379,0 170,0 55,0 60,0 966,0 37,6 63,2 8,3 54,9
The total waste amount in Table 8.8 is the sum of the different waste types and thereby includes
Industrial Waste, Building and Construction Waste. The total waste amount is reported as the activity
data for the Annual Municipal Solid Waste (MSW) at SWDSs in the CRF Table 6.A. Doing so
and referring to the discussion of waste amounts in GPG at page 5.8 it is clear that these amounts is
not really characteristics of the term of Municipal Solid Waste. Further, it should be noted that
these amounts are used to calculate the waste amount produced per capita in the Table 6A,C of the
CRF and that these per capita amounts therefore may not be comparable to other parties using
different approaches.
The implied emission factor (IEF) in the CRF tables reflects an aggregated emission factor for the
model. So far this IEF has been increasing from 1990 to 2001 despite the decreasing amount of
waste since 1995. This is due to the time lag of emissions from the deposited waste calculated by
the model.
In Annex 3.E further details on the model for CH 4 emission from solid deposited waste are given.
8.2.3 Uncertainties and time-series consistency
8.2.3.1 Uncertainty
The parameters considered in the uncertainty analyses and the estimated uncertainties of the parameters
are shown in Table 8.9. The reference is GPG page 5.12, Table 5.2. For all uncertainties
symmetric values based on maximum numeric values are estimated as the uncertainties for the
inventory is a Tier 1 approach to be summed up in the GPG Table 6.1. Uncertainties are estimated
on parameters, which are mostly used in factors for multiplication, so that the final uncertainty is
estimated with Equation 6.4. in GPG.
As regards the uncertainty given in the GPG for the methane generation constant, k, (-40%, +300%)
this uncertainty can not be included in simple equations for the total uncertainties like GPG Equations
6.3 and 6.4. The reason is that k is a parameter in the exponential function for the formula for
emission estimates. The FOD model has therefore been run with the k-values representing those
uncertainties (-40%: k=0,0416 (Half-life time 16 years), +300%: k=0,2079 (Half-life time 3.33 years)
as compared to the k=0,069 (Half-life time 10 years) used. Based on these runs on the actual poten-
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