Regarding improvement
actions on primary packaging, an increase in the percentage
of the recycled tinplate used or the substitution of tinplate by
other packaging materials (i.e., plastic bags) would lead to a
better environmental performance (Hospido et al., 2006).
Furthermore, improvement actions for mussel shell management
include ash appreciation as a calcium carbonate product
and sludge valorization to produce an agricultural fertilizer, as
well as the possibility of resorting to landfilling (Iribarren,
2010).