Data in Table 4 and 5 allow the scenario evaluation to be extended also to volume, cadmium and lead. First of all, the amount of material sent back to the process industry,i.e. effectively recovered, is about half of that separated an collected at source(Table 4). The amounts recovered include the compost produced by the integrated digestion plants and are equal to 19.0%, 23.9% and 31.2% for source separation level 35%, source separation level 50% and source separation level 65%, respectively. Moreover, for higher source separation levels, a larger volume of waste has to be sent to landfill, since the higher amounts of residues generated from the recycling chains and from biological treatments are not balanced by the lower amounts generated from thermal treatments(Table 4).