Report - DCE - Nationalt Center for Miljø og Energi

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Figure 7.4 illustrates the nationally composted amount of waste divided in
the four categories mentioned earlier.
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The Danish legislation on sludge (slambekendtgørelsen) was implemented
in the summer of 2003. This stated that composted sludge may only be used
as a fertilizer on areas not attended for growing foods of any kind in at least
2-3 years. This restriction caused the amount of composted sludge to drop
drastically from 2003 to 2004.
Activity data for the years 1995-2009 stems from ISAG data for the categories:
sludge and organic waste from households and other sources. Activities
for 2010 are calculated by using the development trend from earlier years.
The development in composting of sludge does not demonstrate a convincing
trend that can be used for estimation of activity data for previous years.
Since there is no surrogate data available for the years 1980-1994, activity
data for these years are “not available”.
The amounts of organic waste from households composted in the years
1985-1994 are estimated by multiplying the number of facilities treating this
type of waste with the average amount composted per facility in the years
1995-2001 (2.6-3.8 Gg per facility per year). The following Table 7.10 shows
the number of composting sites divided in the three types described in
“Methodology”.
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