Acquista:
Gli interventi infrastrutturali richiedono sempre più un approccio attento agli aspetti ambientali del territorio. La gestione di imponenti quantità di materiali di scavo comporta rilevanti problematiche tecniche ed ambientali che possono essere affrontate unicamente con un approccio multidisciplinare al problema. Alle problematiche di natura tecnica si aggiunge una corposa legislazione nazionale che, nonostante successivi interventi in questi ultimi anni, ancora non offre ai tecnici chiari percorsi applicativi delle norme stesse. La stratificazione normativa, l’uso improprio di terminologie e le complicazioni procedurali introdotte generano dubbi sulla corretta applicazione delle norme sia alle Amministrazioni competenti, sia agli operatori. Negli ultimi anni, per i motivi appena accennati, sono state rilevate modalità di gestione delle terre e rocce da scavo molto diverse e poco coerenti tra loro [1].
New processing methods for the re-use of excavated
material
This article highlights the top issue concerning
the proper management of excavation
material, the many complex technologies
that can be used in the material handling
process, as well as the doubtless environmental
and socio-economic advantages
arising from the adoption of an approach
pursuant to EU directives. Unfortunately,
technical problems are not eased by the
existing National legislation which, despite
some subsequent latest interventions, failed to provide technicians with adequate
information on how to apply the relevant
regulations. The large amount of laws, the
improper use of technical terms, as well as
the complex procedures make both competent
Authorities and operators have doubts
about the proper application of regulations.
Excavation activities may generate large
quantities of spoil material whose environmental
features do not allow its direct
re-use. For said material, the on site treatment
through waste recovery plants may
represent both the safest solution – under
a regulatory and environmental perspective
– and the most reasonable cost approach.
The S&SW (Soil & Sediment Washing) is
an ex-situ remediation process that can be
carried out both as an off-site intervention
– with fixed plants – and as an on-site
treatment with mobile plants. Said technological
process can be effectively applied to
the processing of excavated material.
In order to make a real contribution to territorial
and environmental protection, it
is important that the re-use of resources
is achieved not only through common industrial
practices, but also with innovative
and renewed technologies referring to the
best pratices of the specific sector. In this
way, the S&SW treatment can be boosted
through process stabilization of the fine
fraction, in order to provide suitable geomechanical
features and with the goal of
developing a zero discharge process.
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