(best examples and good practices) on household organic waste ...

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separation between light (combustible) <strong>and</strong> heavy waste components (metals,
inert materials) is achieved <strong>and</strong> thus a high fuel quality is guaranteed.
The remaining ferrous <strong>and</strong> non-ferrous constituents are removed from the dry,
light weight material using magnetic <strong>and</strong> fluidized bed separators. This treated
lightweight fraction now consists of virtually 100% combustible materials such
as wood, paper, plastics, textiles <strong>and</strong> organic matter. The average composition
of this SRF fraction is shown in (Figure 35.). The renewable energy fraction
contained in the stabilate is around 2/3 <strong>and</strong> could be beneficial for renewable
energy generation. (Wastesum projectDel 3A., 2010)
The calorific value of the SRF lies within the range of 15–18 MJ/kg <strong>and</strong> thus
represents the energy equivalent of treated, dried lignite coal. Due to its dry
consistency, SRF is very easy to store <strong>and</strong> can thus be used as a secondary fuel
in industrial processes when it is required <strong>and</strong> independent of the amount of
waste generated. The removal of heavy metals associated with the removal of
metal parts <strong>and</strong> batteries is of decisive importance for the use of SRF as a
secondary fuel. It reduces the heavy metal load by up to 90% compared to that
of residual waste.
Figure 35.: Average composition of SRF of Dresden plant in Germany
(Wastesum project Del 3A., 2010)
The heavy fraction gained from the initial density sorting process is subjected
to further treatment stages. With the separation of the combustible residues
(organic matter, plastics), the overall organic content (expressed as ignition
losses) are reduced <strong>and</strong> a material quality is achieved that can for example be