2007:04 Hantering av förpackat livsmedelsavfall - Avfall Sverige

DEWASTER ® - Sorting out the problems of mixed waste
more than has typically been achieved by source sorting and separate collection of OFMSW in prior
Danish studies.
The remaining app. 40 % of organic matter which was “lost” is to a large extent paper fibres sorted out
as part of the screen reject and in the press reject. The separation of paper fibres from bio pulp is desirable
in respect to bio gas production, since paper fibres are typically not digested and, thus, simply
increase the amount of sludge from the bio gas reactors which has to be disposed of while at the
same time creating problems for use of sludge as fertiliser on farm land.
Heavy metals and pollutants in bio pulp fraction
The contents in the bio pulp of heavy metals and pollutants regulated in present Danish legislation
was as follows: (calculated as the average figures for analysis performed on all samples taken during
the EPA Study)
Heavy Metals
P016 P017 P018 P019 P030 P031 P032 P033
Pb 33 4 20 3 17 1 20 2 15 5 11 1 38 8 17 0
Cd 27 1 31 3 76 11 32 6 30 2 26 1 28 4 30 23
Cr 23 1 21 4 26 11 18 0 19 0 13 0 39 1 36 3
Cu 4 1 6 0 10 1 4 0 4 1 4 2 7 0 6 0
Hg 650 159 136 72 84 14 54 33 7 3 15 0 6 6 12 0
Ni 29 1 86 86 37 0 26 3 22 1 23 0 22 7 16 3
Zn 4 0 7 2 4 0 3 1 5 0 5 0 5 1 5 0
Values are displayed as average content of heavy metals as percent of permit limit for each metal.
Values are based on two measurements (different laboratories). Small numbers are dispersion. In
sample P016 Hg is higher than allowed. In sample P017 the level of Hg is allowed when using the rule
that some samples may cross the limit up to 50%.
Pollutants
P016 P017 P018 P019 P030 P031 P032 P033 Avr.
NPE 2,2 22 3,3 33 2,0 20 2,3 23 2,4 24 3,6 36 1,7 17 1,8 18 2,4 24
PAH 0,8 27 0,5 17 0,8 27 1,3 43 0,4 13 0,6 18 0,4 12 0,5 16 0,7 22
DEHP 36 72 93 186 130 260 200 400 62 124 29 58 32 64 65 130 81 162
LAS 71 5 29 2 34 3 30 2 21 2 52 4 54 4 25 2 40 3
Values are displayed in mg/kg DM. The small numbers is the percentage of the permit limit (NPE 10,
PAH 3, DEHP 50, LAS 1300 mg/kg DM). LAS: Active component (anionic detergent) in detergents and
cleaning materials. NPE: Active component (non-ionic detergent) in detergents and cleaning materials,
etc. DEHP: Used as plasticiser/"softener" in plastic products, e.g. PVC and Mac183. PAH: The sum of
nine individual substances found in oil/tar products
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