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

8 Waste Sector (CRF Sector 6)
8.1 Overview of the Waste sector
The Waste sector consists of the CRF source category 6.A Solid Waste Disposal on Land, 6.B. Wastewater
Handling, 6.C. Waste Incineration and 6.D. Other.
For 6.A Solid Waste Disposal on Land CH 4 emissions are considered in the following as a result of
continuation of previously used and reported methodology.
For 6.B. Wastewater Handling the CH 4 and N 2 O emissions are considered as a result of a survey carried
out recently and since the NIR 2004 submission.
For the CRF source category 6.C. Waste Incineration the emissions are included in the energy sector
since all waste incinerated in Denmark are used in the energy production.
For the source sector 6.D. Other emissions from combustion of biogas in biogas production plants
are included. The emissions are very small for all years: below 0.03 Gg CO 2 equivalent, taken as the
sum of the GHG contributions.
In Table 8.1 an overview of the emissions is given. The emissions are taken from the CRF-tables
and are presented rounded. The contribution from 6.D is not included, since the small contribution
(refer above) is not to be seen in the digits chosen for this overview.
Table 8.1. Emissions (Gg CO 2 eqv.) for the waste sector.
6.A Solid Waste Disposal on Land is the dominant source of the sector contributing around 80% of
the total Gg CO 2 eqv. Through the time-series the emissions are decreasing due to the decreasing
amounts of waste deposited.
6.B. Wastewater Handling. For this source CH 4 is the most contributing GHG and it contributes with
about 12-19% to the sectoral total, with an increasing contribution through the time-series. Also, in
absolute figures the CH 4 emissions from this source have a slightly increasing trend resulting from
the increase in industrial influent load of total organic wastewater, a decrease in the final sludge
disposal category “combustion” and little recovery of methane potential by biogas production.
N 2 O from this source contributes with about 4-5% of the sectoral total. In absolute figures N 2 O
emissions decreases through the time-series. The decrease is due to the technical upgrade of the
wastewater treatment plants resulting in a decrease in effluent wastewater loads, i.e. decrease in
activity data, determining the indirect emission of N 2 O, which is the major contributor to the emission
of N 2 O.
190
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
6 A. Solid Waste Disposal on Land CH4 1334 1358 1366 1379 1335 1286 1274 1208 1162 1191 1192 1188 1156 1153
6 B. Wastewater Handling CH4 200 204 208 213 217 222 226 252 235 234 217 229 277 244
6 B. Wastewater Handling N2O 88 83 73 91 92 85 69 65 66 62 65 57 58 61
6. Waste total 1622 1645 1648 1683 1645 1593 1570 1525 1463 1487 1475 1475 1492 1457