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Over the course of time, the production units have been adapted to deal with the evolution of reference environmental standards. In particular, in the month of October 2002, the SO2 and NOx abatement systems were put in service on the 320 MW sections 5 and 6, and between 2002 and 2003, the microparticle abatement systems were installed and put in service on the 160 MW sections 1, 2, 3 and 4. The works for the erection of the new plants designed to comply with the environmental requirements for the 320 MW units (authorized by the Councillor for the Territory and Environment of the Sicily Region with the D.A. 292/17 06/24/1998 and D.A. 732/17 12/03/1998) involved investments amounting to approx. EUR 250 ml and approx. 1.6 milion working hours on site. A list of the main plant works is given hereinafter:
Both 320 MW units comply with the air emissions limits set forth in the DM 06/12/1990 and since 1st January 2008 the limits set forth in the DLGS 152/06 and they remarkably reduce emissions with respect to the previous limit requirements:
The upgrading of the 160 MW assemblies (authorized by the Department of the Territory and the Environment for the Region of Sicily by means of Decree no. 430/17 dated 19.06.01), has allowed the reduction of the principal effluents present in the combustion gases (sulphur dioxides, nitrogen oxides and microparticles). The activities have involved investments amounting to 27 million Euros about. The interventions carried out were the following:
Each individual 160 MW thermoelectric section respects the following emission limits, in conformity with that envisaged in the Ministerial Decree of 12.7.1990.
The environmental monitoring is guaranteed by an Air Quality Recording Network (RRQA), consisting of five stations, which have been guaranteeing the continuous monitoring of air quality pertaining to the ground concentration of sulphur dioxide since 1976. As of 1998, upon the verification of critical situations in terms of concentrations of pollutants in the ground, the values measured at the stations of the Recording Network have determined the implementation of interventions, by the power station, to reduce emissions from its own chimneys into the atmosphere (such as, for example, a reduction in the electrical load generated, up to the switching off of one or more production units). The emission-reduction interventions to be implemented and their relative activation thresholds, which are defined by the decrees issued by the competent Regional Authorities, have been subsequently updated. The last update was made in January 2008, also in relation to the environmental adaptation interventions carried out by Edipower in the meantime.
The boiler generates the high pressure and high temperature steam used in the steam turbine. The turbine provides rotation of the generator to which it is rigidly connected to. The electricity voltage is raised by the transformers from 15 to 160 kV in units 1 and 4, from 15 to 240 kV in units 2 and 3 and from 20 to 240 kV in units 5 and 6 before being fed to the electrical transmission grid. Seawater is also used for the production of part of the industrial water necessary for the operation of the plant, reducing the removal of water from the aquifers. The completion of a special inverse osmosis plant in 2002 contributed towards a reduction in the consumption of aquifer water from the previous 1,592,000 cubic metres per year (2001) to the current 811,000 cubic metres per year (2007). A further reduction in the use of resources (estimated at more than 2 million cubic metres of seawater for the period from 2003 to 2007) is obtained by means of the recycling of some of the water, treated by the Sewage Treatment Works (ITAR). As regards emissions, the environmentalization project, which was authorized by means of decree no. 992 issued on 15/06/2007 by the Department of Industry for the Region of Sicily, envisages the following interventions on the 160 MW 1 and 2 assemblies:
For assemblies 3 and 4, within the sphere of the integrated environmental authorization procedure (AIA), a request was forwarded for exemption from the obligation of reducing the current emission values, which at the same time obliges Edipower to run the two assemblies until 2015 for a maximum of 20,000 hours overall. The emission limits will be indicated on the release of the AIA. By means of a Decree of the Department of the Territory and the Environment dated 16 January 2008, the working conditions of the four 160 MW assemblies were established in the course of the attainment of the AIA, actually halving the emissions from assemblies 3 and 4 with respect to the values envisaged by the request for exemption. Downstream of the interventions, the emissions of NOx and SOx will be appreciably reduced, both in relation to the new emission levels of assemblies 1 and 2 (equal to 100 mg/Nm3 and 200 mg/Nm3 respectively for NOx and SO2), and in relation to the limitations introduced for assemblies 3 and 4. Together with the interventions on the production units, Edipower has integrated the instrumentation and fitting-out of the fixed stations of the Air Quality Recording Network, which has been capable of measuring the following ground pollutants since 2008: sulphur oxides, nitrogen oxides, carbon moNOxide, ozone and microparticles (PM10, PM2.5). Subjected to regular maintenance and calibrated in accordance with the reference standards and supported by an emergency service 24 hours a day to guarantee its reliability and working continuity, the Network is interconnected with the Provincial network in real time; the data acquired from the Edipower stations are processed by the Province of Messina and made available, together with those of the provincial network, in a format suitable for the purposes of any future implementation of interventions to reduce the emissions into the atmosphere that may be foreseen by the regional regulations.
The main technical specifications are as follows:
Unit 5 and 6 The main technical specifications are as follows:
Unit 5 and 6
5 and 6 unit
Unit 5 and 6
At the Thermoelectric Power Plant of San Filippo del Mela, Edipower will undertake construction work on a photovoltaic plant to generate 3.4 MW overall, of which 2.6 MW will be achieved with the installation of photovoltaic modules using CIS (copper, indium and selenium) technology. This will be the largest plant in the world to use this innovative technology, whose potential is still being studied and which has, to date, been adopted by very few companies on a global level. The initial laboratory tests indicate efficiency of up to 18%, making this technology a gamble for the future and a new frontier for the construction of cheap and efficient photovoltaic modules. The remaining 0.8 MW will be achieved by means of the more traditional monocrystalline silicon. At the moment, Edipower is waiting to receive the necessary permits from the Region. The construction of the San Filippo del Mela photovoltaic plant will involve an investment of approximately 11 million.
The San Filippo del Mela Power Plant is equipped with the following systems to reduce emissions to the air: 160MW Unit 1, 2, 3 and 4:
There are nitrogen oxide and sulphur oxide abatement systems currently under construction on assemblies 1 and 2, which will allow a drastic reduction in the emissions of these compounds. 320MW Unit 5 and 6:
The emissions to air of nitrogen oxides (NOx), sulphur oxides (SO2), particulate and carbon moNOxide (CO) are continuously monitored and recorded via an Emission Monitoring System (SME); the measured data is sent to the relevant control authority on a monthly basis. A protocol transmission is in an advanced phase of experimentation which will make these data available to the Regional Authority assigned to the check in real time. The immissions at ground level of sulphur oxides (SO2) are detected by an Air Quality Detection System (RRQA) consisting of five measuring workstations located in the municipalities of Valdina, San Pier Niceto, Pace del Mela, San Filippo and Milazzo. The data is transmitted in real time all'autorità di controllo. The instrumentation installed in the measuring stations has recently been integrated to guarantee the measurement of nitrogen oxides, carbon moNOxide, ozone and microparticles (PM10, PM2.5). The waste waters of the Plant (acids/alkalis, oily and biological) are treated by a special installation (Sewage Treatment Works or ITAR), whose discharges are continuously monitored. The waters coming from the oily water treatment section of the ITAR are used as the supply for the DeSOx plant. All activities that interact or may interact with the environment are managed in accordance with the ruling environmental laws and the available state–of-the-art techniques. Surveys carried out in year 2004 identified pollution in soil and ground waters of some limited and restricted plant areas. In year 2006, the first phase of land reclamation works was started as approved by the Municipality of San Filippo del Mela in year 2005, and an invitation to bid process was carried out to contract the works relevant to the second and final phase. During the course of 2008, the works were concluded for reclamation, approved by the Municipality of San Filippo del Mela in 2005, and reclamation work has begun. The management of the power plant has implemented an Environmental Management System that was certified according to the UNI EN ISO Standard 14001 in May 2002. To foster the ongoing improvement of the environmental performances and the information to the public the management of the l power plant has voluntarily adopted the EU Ecomanagement and Audit Scheme (EMAS) and obtained the registration in March 14, 2004 with the number I-000178, and renewed on 19th december 2006.
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