With a view to the simplification, optimisation and rationalisation of the corporate structure and in compliance with the guidelines of the 2011-2013 strategic plan, approved by the Board of Directors of ACEA S.p.A., it seemed appropriate and convenient, effective from 1 September 2011, to go ahead with the merger by incorporation of TERNI EN.A. S.p.A., E.A.L.L. S.r.l., ENERCOMBUSTIBILI S.r.l. and ERGO EN.A. S.r.l. into A.R.I.A. S.p.A..

Completion of this corporate restructuring and simplification project led to significant organisational rationalisation, a reduction in company operating costs, simplification of the flow of human resources and materials between the different companies, elimination of recharge flows, and rationalisation of property assets used by the various industrial companies.

Activities performed by the company A.R.I.A. S.p.A. in 2011 were characterised, until the end of August, by the coordination and provision of services to the subsidiaries.

Subsequently, due to the aforementioned merger by incorporation, A.R.I.A. S.p.A. started the direct management of the assets deriving from the incorporated companies.

The operating activities performed by the different plants are commented on below.

TERNI WASTE-TO-ENERGY PLANT: the waste-to-energy plant operates in electricity production from renewable sources, and specifically the paper mill pulp waste to energy sector.

Due to the plant revamping works which began in 2010, the waste-to-energy project is currently suspended. The photovoltaic plant installed at the site, however, is currently operational and in 2011 it generated 442,255.80 kW of electricity.

Plant “revamping works”, already commenced on October 2010, stopped as a result of the company’s withdrawal, pursuant to Legislative Decree no. 490 of 8 August 1994 and Presidential Decree no. 252 of 3 June 1998, from the tender contract stipulated with the economic operator that was the winning bidder in the initial selection procedure. This required a re-planning of the supply terms of the turbine, involving a different, specific contract relationship, to be installed in the plant following revamping works, and the need to identify a different economic operator to assign the works to. The new contract was signed in October 2011, which envisages the completion of works in the second half of 2012, set out in the time schedule presented by the new contractor. This meant the plant shutdown stretched throughout 2011.

The following activities are also underway:

  • the continuation of scheduled maintenance work performed directly by plant personnel;
  • the expected start of authorisation activities to obtain a new AIA (Integrated Environmental Authorisation) for the extension of authorised fuels.

PALIANO RDF PRODUCTION PLANT: the Paliano RDF production plant possesses an ordinary authorisation for the production of RDF, expiring on 30 June 2018.

This authorisation certainly represents a significant asset, especially if we consider the difficulties connected with locating, realising and authorising activities in the environmental sector, and in particular, waste treatment.

In line with the provisions of the business plan, reduced RDF production recommenced in the last few days of August, by working the FSC (dry waste) produced by AMA S.p.A. plants; this allowed the definition of RDF according to UNI 9903 regulations, which requires 5 consecutive weeks of analysis.

The company is currently completing upgrading work linked to the safety of plant infrastructures.

These activities, performed alongside works to upgrade the plant’s fire safety system, required the plant to be shut down, which will extend until the end of the first quarter of this year at the latest.

The technical details of the activities performed are shown below:

    Year 2011 Year 2010
Dry waste ton 3,285 2,072
Incoming RDF ton 0 0
Other incoming special waste ton 0 204
TOTALS ton 3,285 2,276

SAN VITTORE DEL LAZIO WASTE-TO-ENERGY PLANT: the San Vittore del Lazio waste-to-energy plant operates in electricity production from renewable sources, and specifically from RDF.

2011 saw the completion of the revamping project through the implementation of lines 2 and 3 of the plant, while works commenced for the complete renovation of line 1, whose activities ended in March.

This determined a complex plant situation, characterised by an operating period essentially combined between the final management period of line 1 and the launch of line 2 in April, and the launch of line 3 in July.

The main operational data is shown below. The comparison between the same period in the previous year, in technical and economic terms, is purely indicative, given that it relates to two different productive and managerial situations.

    2011 2010
    LN 1 LN 2 LN 3 TOT  
Directly operational hours in parallel h 1,868 5,417 3,787 11,072 8,051
Electricity generated Mwh 16,954 77,289 55,180 149,423 80,171
Electricity sold Mwh 14,562 66,019 47,707 128,288 70,603
RDF delivered by SAF tonnes 15,606 36,377 18,958 70,941 77,765
RDF delivered by OTHERS tonnes 2,848 42,669 40,762 86,279 13,383
RDF produced by the Paliano plant tonnes 0 1,209 1,138 2,347 2,127

An examination of the operating figures highlights a significant increase in the quantity of RDF delivered by third parties, in addition to the quantity delivered by SAF S.p.A., and the increase in the potential productivity (MWh sold/parallel hours) of line 2 (plus 11 MWh/h), compared to that obtained previously by line 1 (8 MWh/h).
These figures allow the performances of the new plant to be viewed in a positive light.

As outlined above, April saw the conclusion of the implementation of line 2 and start of the phase of assisted management which extended until the end of November. Realisation of line 3, by contrast, was concluded in July, while the associated phase of assisted management extended until the end of December.

As regards the revamping of line 1 of the existing plant, a plant upgrading project was launched, in order to reach the following objectives:

  • enhancement of energy performances (with equal thermal potential of the oven and equal quantity of fuel treated);
  • enhancement of environment performances;
  • improvement of the operating and management structure of fuels.

Works started in June, with the start of demolition activities. During the last quarter, an authorisation request was presented targeted at environmental upgrading for the architectural-functional redevelopment of the site as a whole, and the completion of civil works strictly related to the plant.


The company SAO owns the waste dump located in the municipality of Orvieto and manages urban and special waste.
The following events took place in 2011:

  • pursuant to provisions envisaged in the Integrated Environmental Authorisation issued by the Umbria Region with Managerial Directive no. 210 of 19 January 2010, the transfers of special non-hazardous waste continued;
  • application of the tariff plan provided by the agreement between SAO and ATO4 on 13 August 2007, that regulates management of the public service of selection, treatment and disposal of solid urban waste and similar products from the ATI4 municipalities and the special waste resulting from treatment of the aforesaid urban waste.

The quantities of waste input and treated at the Orvieto plants in 2011 is reported below, as compared to 2010.

    Year 2010 Year 2011
Solid Waste ATO 4 tonnes 20,500 6,638
Solid Waste extra ATO 4 tonnes 26,397 22,942
Solid Urban Waste Orvieto tonnes 13,487 9,863
Solid Urban Waste Orvietano Area tonnes 10,656 9,926
Solid Urban Waste Amerino Area tonnes 6,245 5,702
Solid Urban Waste Ternano Area tonnes 7,732 1,190
Terni org. waste from selec. plants tonnes 21,709 23,730
Org. waste from sorted collection tonnes 8,307 7,868
Sludge tonnes 6,492 6,420
FSC (dry waste) from sel. plant Terni tonnes 34,978 33,604
ASM Terni pieces tonnes 1,968 1,842
Bulky solid urban waste tonnes 0 4,068
TOTALS tonnes 158,471 133,793

The figures above show that quantities transferred were roughly 25 thousand tonnes less than the final value in 2010.