The breakwater wall and embankment stabilisation on a section of the C-16 in the municipality of Terrassa, Barcelona, carried out by Sorigué, has been turned into a chance to apply, through a pilot test version of the digest (organic product) obtained from organic waste from the rejection fraction of Mechanical Biological Treatment Plants (PTMB in Spanish) for embankments stabilisation.
 
The project took place in collaboration with the Protection and Restoration of Soils Group of the Ecological Research and Forest Applications Centre (CREAF in Spanish), a public research centre attached to the Autonomous University of Barcelona.

The main objective of this pilot test is to study the recovery potential of waste generated at the PTMBs, and their application considers, amongst other tasks, the detailed characterisation of soil to detect possible limitations; the selection of the organic product for the creation of a techno soil based on information from previous studies; and the selection of seed and plantation species that contribute to embankments stabilisation.
 
The work carried out by the Sorigué Conservation line of business, includes, amongst other operations, restitution of soil with this organic product, the protection of the embankment with nets, the formation of a gutter with Californian drains at the foot of the embankment, and the formation of a new breakwater and gutter in replacement of those that have deteriorated.