A similar behaviour is observed for aluminium recovery. Despite being beneficial for most of the impact categories, it implies burdens in the impact category human toxicity (non-cancer effects). This is mainly related to the production of zinc, which is used as alloying element in the melting process for secondary aluminium production.
The burden in the impact category ozone depletion is mainly due to the presence of CFCs in the waste, and thus to their direct emission into the TH287 when they are incinerated.
Polyurethane landfilling gives a burden to the marine eutrophication impact indicator, as a consequence of the direct emissions of nitrogen compounds in the water compartment.
3.2.2. Large household appliances (R2)
The main benefits of the treatment and recovery of the large household appliances (category R2) derive from metals (ferrous scraps and metals in cables, motors and in the stream “PS plastics + metals”) and plastic recovery (from stream “PS plastics + metals”).