Results Achieved

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Final pilot plant layout

During the project the researchers considered several solutions for the layout of final pilot plant. On the basis of analysis carried out and the observations made during the process of experimentation the final proposal for the treatment plant is this:piloy plant final Given the negligible content of particles > 4 mm, it was considered possible to feed the preliminary screen (2) undersize (< 2 mm) directly to a hydrocyclone (3) without passing through the spiral classifier; through the hydrocyclone the separation of most of the fine particles (hydrocyclone overflow) is accomplished. The hydrocyclone underflow goes to the attrition cell (4) in order to break the aggregates and (if required) reduce the organic contaminants content in sand; the performance of the attrition cell benefits from the separation of the fine particles previously performed by the hydrocyclone (3). The outflow of the attrition cell is fed to the spiral classifier (5) through which the separation of -2 mm +0.6 mm sand particles (spiral classifier underflow) is accomplished; the overflow of the spiral classifier goes, together with the hydrocyclone overflow, to a second hydrocyclone (7) where the recovery, as under, of the fine sand (- 0.6 mm + 0.063 mm, if any) is carried out. Detail of consideration made during the process of experimentation  are available at this link.

Evaluation: Analysis of long-term benefits

Environmental benefits

The project demonstrated through appropriate treatment of dredged sediments, it is possible to derive selected material fractions with suitable characteristics in view of reuse. Implementation of technical regulations and standardization of the required conditions for sediment utilization should be a follow-up of the project at both the national and the local level. At the regional scale, ARPA may act as the linking actor between the regulators and experts/stakeholders in the field of sediment management. Detail of  Environmental benefits (link)

Long-term sustainability

Sustainability in long term was evaluated. In particular were consuderated this indicators.

  • approach used
  • character of dredged sediment
  • The network-based system for sediment management
  • Economic implicationsof the project
  • Economic advantage use of treated sediment
  • Social implications
  • occupational implications

More details at this link.

Replicability, demonstration, transferability, cooperation

As already mentioned, no technical barriers for the reproducibility and transferability of the proposed sediment treatment process and integrated sediment management system are recognized. However, since the proposed system is simple and has a low-tech character, economic constraints are not believed to have the potential of negatively affecting full-scale transferability. On the other hand, strong drivers are believed to claim for the application of the proposed system; these include: market demand of sand for beach nourishment purposes, space limitations for landfill disposal of dredged sediments, requirements for recycling of residual materials, as well as local criteria for preservation of coastal areas.

After the Coast Best life project

The project has demonstrated that the proposed layout for sediment separation and treatment is viable and the developed network-based system may be a useful tool for integrated sediment management, there are still important issues that deserve further investigation. Wide application and implementation of the process and the system developed is deemed of paramount importance to maximize the positive outcomes of the project. As the project concludes, the most pressing challenge will be to secure funding and additional financial/technical resources to continue to build upon the progress made. Details abut what was on the continuation of the project are avalialbe at the following page.