Action 3: Scaled pilot plant

The aim of this action is to define a scheme for the physical treatment of sediment dredged from small harbors. The action involved laboratory testing focused on identifying the best available techniques of acceptable cost. Results were then used in creating a proposal for the implementation of a pilot scheme. The pilot plant was created and run in order to check results obtained at a laboratory level and to evaluate the applicability of the proposed treatment scheme.

Activity

  • A.3.1: Treatability tests.
  • A.3.2: Characterization of the separated fractions.
  • A.3.3: Installation, start-up and operation of the pilot plant.
  • A.3.4: Sediments dredging and delivery to the pilot plant.
  • A.3.5: Pilot plant running and estimation of the separation efficiency.
  • A.3.6: Characterization of the separated fractions.
  • A.3.7: Evaluation of feasibility of pilot plant upgrading.

Beneficiaries involvement:

Main role: UNICA    Partecipants: UNIROMA, ISPRA , ARPA-ER , I.CO.P. Spa

Download: Reports of the subactions

  • Report containing mass balance and separation efficiency of tests for the identification of the most appropriate treatment sequence [Deliverable A3.1 e A3.2 – Allegato report 7.2.11] Deliverable actions 3.1 3.2 (38)
  • Electronic database of separated fraction properties [Deliverable A3.1 e A3.2 – Allegato report 7.2.12] Deliverable actions 3.1 3.2 (electronic annex) (33)
  • Pilot plant ready to run [Deliverable A3.3 – Allegato report 7.2.13] Deliverable action 3.3 (35)
  • Report of action 3.3 [Deliverable A3.3 – Allegato report 7.2.28] Report on Action 3.3 (42)
  • Report of action 3.4 [Deliverable A3.4 -Allegato report 7.2.29] Report of action 3.4 (40)
  • Pilot plant – Report with detailed description of methods and procedures [Deliverable A3.3 – Allegato report 7.2.14] Deliverable action 3.3 part 2 (35)
  • Report containing the results from pilot-plant runs in terms of separation yields and output streams properties [Deliverable A3.6 – Allegato report 7.2.15] Deliverable action 3.6 (32)
  • Electronic database of properties of sediment fractions from pilot-scale tests [Deliverable A3.6 – Allegato report 7.2.16]
  • Upgraded configuration of the pilot-plant. Report containing results description and discussion [Deliverable A3.7 – Allegato report 7.2.17] Deliverable action 3.7 (38)

 

Summary of the Action

A.3.1: Treatability tests

According to the figures arising from the activities of ARPA have been identified following treatment technologies:

  • Soil / sediment washing,
  • Liberation means mechanical actio,
  • Separation of solid – solid,
  • Separation of solid – liquid.

Insight into the treatment technologies   It was set up the workspace and the first tests were performed. click photo to enlarge

A.3.2: Characterization of the separated fractions.

Based on data compiled by ARPA-ER on the physical and chemical properties of sediments, taking into account the activities and achievements in Action 2.6, the beneficiaries have chosen the methods and procedures to be used for characterization of the sample. objectives:

  • Recovery of the sand fraction
  • Fraction
  • Quality objectives:
  • or contamination below the CSC for sites for residential use,
  • or possibly aesthetic.
  • Commissioning of a pilot plant.

Samples included in the activities carried out up to this point:

  • Bellaria 1,
  • Bellaria 2,
  • Porto Cesenatico 1,
  • Porto Cesenatico 2,
  • Porto Garibaldi,
  • Cervia,
  • Porto Cesenatico 3,
  • Bellaria 3.

Example 2 POCES sample treatment schedule suggested   click photo to enlarge Summary of initial results  Some photos of the fractions of sediment output from the treatments. click photo to enlarge The sediment POGAR as it could be directly used for beach nourishment has a content of fines 500 mm, may therefore be feasible for treatment of:

  • separate the> 500 mm, thus reducing the content of PAHs and metals, and organic materials to generate;
  • separate the fraction

Diagram for the process of sample treatment POCES hypothesized. click photo to enlarge Some results. click photo to enlarge

A.3.3: Installation, start-up and operation of the pilot plant

Based on the results of the characterization and preliminary tests in Action A3.3,  was installed and operated a pilot plant scaled  designed to recover particle size fractions of sandy sediments present in the subject of dredging. A first working hypothesis was the installation  of the pilot plant in an area in St. Giorgio di Nogaro (UD) which included a port for small boats. click photo to enlarge   Summary of the administrative procedure for the authorization of the plant.  Problems of administratives authorization occurred in the course of the project made it isn’t possible use this area. In collaboration with ARPA ER, ICOP has tried to install the experimental plant at a port area in the port of Ravenna. Following the checks with the owner of the company and the Port Authority has been ruled out this hypothesis. Icop proceeded in the search for a third area used to develop the treatment plant. In December 2011: ISPRA has made available to I.CO.P. Spa an existent  pilot plant scaled  (on a trial basis) on an area in the port of Livorno. This structure can be developed and implemented so that it serves the objectives of the project Coast Best. In July icop has then required appropriate and the administrative permissions from the Region of Tuscany in order to activate the system. Tuscany with Resolution no. 3291, approving the project for the construction and operation the pilot plan scaaled for recovery of sediments (according to art. 211 of Legislative Decree 152/06). The dredged sediments were then transferred in the plant

the area where it will be installed the pilot plan scaled

General diagram of the treatment pilot plant  Summary of the authorization system During December 2012 and January 2013, the pilot plant was installed in the Livorno.   Carico e vaglio Cicloni, coclee e celle attrizione

A.3.4: Sediments dredging and delivery to the pilot plant

In order to ensure direct on-site assistance during the activities of action 3.4 and to allow for easier and faster approach with the competent Italian authorities in charge of releasing the authorization for dredging, ENVISAN took advantage of the external assistance of Jan de Nul Italy SpA. Action 3.4 was aimed at dredging about 6 m3 of sediments from each selected port in order to deliver the dredged material to the demonstration plant for sediment separation and treatment. On the basis of the outcomes of the survey of the available dredging techniques conducted during action 2.8, ENVISAN decided to make use of a dredge equipped with a closed environmental bucket for sediment dredging. On account of the volume of sediment to be dredged, a 0.5 m3 closed bucket was selected. The dredging activities were performedin 6 phases 1) request the authorization to the Harbour Master 2) correctly locate the dredger above the sampling point 3) arrange the open big bags on a steel structure 4) start sediment dredging 5) fill the big bags with the sampled material The maximum volumetric capacity of the individual big bags was 1.5 m3, however, in order to prevent tearing of the big bags during handling due to the high specific weight of the dredged sediments, only half of their volume was filled. A 3.4 punti campioni  Aerial view of thev4 ports end the sampling point A3.4 dragaggio   Pictures from dredging in the Porto Garibaldi harbor carico View of the dredging equipment used for sediment dredging

A.3.5: Pilot plant running and estimation of the separationefficiency; A.3.6: Characterization of the separated fractions.; A.3.7: Evaluation of feasibility of pilot plant upgrading.

The pilot plant ( made of: a loading belt conveyor, a 2 mm preliminary screening, a first hydro-cyclone for the separation of most of the fine particles, an attrition cell in order to break the aggregates and eventually reduce the content of pollutants, a spiral classifier for the separation of most of the sand, a second hydro-cyclone for the recovery of the fine sand particles) has been thought, designed and built up in order to be effective in order to achieve the goal of the project as well as flexible in order to make possible eventual future operation with sediments other than those considered in the present project. The products which could be recovered are sand, gravel, silt/clay and the eventual contaminants can be concentrated in the fine fractions. The plant is compact, easy to be transported by truck and to be installed in another location. Treatment runs were performed on all the sediments considered by the project activities, using all or some of the above mentioned plant sections. The results confirmed in general those attained at the laboratory scale. The maximum recovery of usable product achieved  92% of the treated sediment mass with a maximum sand content of 95% of the recovered product The Database of the tests performed during testing of the system are the following: Report of Action 3.6 – Report containing results from pilot-plant runs in terms of: separation yields and output streams properties Report of Action 3.6 – Electronic database of each separated fraction properties Report of Action 3.7 – Up-graded configuration of the pilot-plant. Report containing results description and discussion.  Pilot plant works. IMG_9469  Impianto in azione IMG_9509 IMG_9515  IMG_9506 IMG_9502 IMG_9530  IMG_9525 Deposito reflui Photo gallery 

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Subaction’s final Reports

  • Report containing mass balance and separation efficiency of tests for the identification of the most appropriate treatment sequence  [download id=”33″]
  • Electronic database of each separated fraction properties [download id=”59″]
  • Pilot plant ready to run (A 3.3) [download id=”66″]
  • Pilot plant. Report  with detailed description of  methods  and procedure (A 3.3) [download id=”67″]
  • Report of A3.4 [download id=”65″]
  • Report of Action 3.6 – Report containing results from pilot-plant runs in terms of: separation yields and output streams properties [Due to the big size, this attachment is available by sending a request by e-mail to:  lbortoluzzi@labelab.it]
  • Report of Action 3.6 – Electronic database of each separated fraction properties [Due to the big size, this attachment is available by sending a request by e-mail to:  lbortoluzzi@labelab.it]
  • Report of Action 3.7 – Up-graded configuration of the pilot-plant. Report containing results description and discussion. [Due to the big size, this attachment is available by sending a request by e-mail to:  lbortoluzzi@labelab.it]

Various documents