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Resource management

 

Our administration of materials and waste in our operations

The energy transmission service provided by Terna does not require a significant amount of materials or the handling of a considerable amount of waste.

The service includes, however, the building and maintenance of a certain amount of assets, whose principal components are:

  • Power lines: pylons, conductors, insulators
  • Transforming stations: transformers, switches, other equipment
  • Control systems

In the case of Terna, both the use of materials as well as the management of waste materials relate predominantly to the building and maintenance of electricity and computer infrastructures

The overall picture of all Terna's environmental data is available for download here.

Two are the areas of interest to Terna:

  • Use of resources
  • Waste

Terna does not use raw materials, but does purchase finished products (electrical equipment, conductors, tools and other components). An estimate of the materials contained in the main products purchased is shown in the table below. Amounts have been estimated taking into account the average material content of the various products purchased in the years referred to.

MAIN MATERIALS IN SUPPLIES -  Tonnes

2018

2017

2016

Porcelain

715

303

193

Polymeric

406

171

93

Copper

4,323

1,870

461

Aluminium

8,061

3,963

2,858

Steel

11,14

6,933

13,253

Glass

3,879

1.466

859

Dielectric oil

1,275

812

227

 - of wich vegetable oil 364 486 -

SF6

8

9

34


In office activities, the principal material consumed is paper.

From the end of 2009, all of the paper purchased by Terna is made with a TCF paste, chlorine free, and provided with a FSC-Forest Stewardship Council certification, to ensure that the forests from which is; taken are managed in compliance with both environmental and human rights.

PAPER CONSUMPTION

Unit

2018

2017

2016

Change 18-17

% change 18-17

Certified paper (100% recycled)

ton

61

50

60

10

21


Water is not involved in the production cycle for electricity transmission and dispatching. Usually the water used – for hygienic uses, for cleaning the premises and for the air conditioning – comes from domestic water supply connections.

WATER CONSUMPTION

Unit

2018

2017

2016

Change 18-17

% change 18-17

Water withdrawn by source

m3

179,722

171,074

162,272

8,647

5


The overall picture of all Terna's environmental data is available for download here.

At the end of their normal lifecycle, the materials used in electricity infrastructure are recovered for reuse in operations. Only a residual portion is sent to landfill and has an impact on the environment.

The percentage of waste recovered amounted to 86% in 2018 (87% in 2017 and 93% in 2016).

The effective amount recovered depends on the materials contained in the waste: some of them are easy to separate out and thus reuse (for example, the iron parts of pylons); in other cases, instead, it is not possible or it is too costly to separate the various parts, above all when dealing with the most obsolete equipment.

For this reason, annual changes in the amount of waste generated and the percentage of waste recycled should not be interpreted as indicating a trend.

WASTE BY CATEGORY Tonnes
2018
2017
2016

Waste produced(1)

6,774.2

4,801.5

4,941.6

of which hazardous

3,484.2

2,250.6

1,842.5

of which non-hazardous

3,290.0

2,250.8

3,099.1

Recycled waste

5,799.1

4,188.1

4,581.4

of which hazardous

2,936.1

1,832.1

1,560.6

of which non-hazardous(2)

2,863.1

2,356.0

3,020.8

Waste sent for disposal(3)

1,050.3

315.6

351.6

of which hazardous

555.8

171.4

275.6

of which non-hazardous

494.5

144.2

76.0

(1)Only special waste produced during production processes is included, not waste produced by services (urban waste). Effluents and waste from septic tanks, produced by substations not connected to the sewer network, are not included; the quantity for effluents and waste from septic tanks was 388 tonnes in 2018 and 617 tonnes in 2017, 789 tonnes in 2016.

(2)This comprises uncontaminated metal waste deriving from the decommissioning of transformers, electrical equipment and machinery (e.g. generators), with an average recovery rate of 100%.

(3)Waste sent for disposal may differ from the mere disparity between waste generated and recovered due to temporary waste storage. 


The main hazardous special waste produced by Terna’s operating activities consists of:

  • metal wastewhich derives from the decommissioning of transformers, electrical equipment and machinery no longer in use and is contaminated by hazardous substances; they have an average recovery rate - after treatment by third parties - of over 95%;

  • batteries (lead and nickel), which, in the event of a blackout, enable emergency generators to be switched on in order to keep the energy transformation and transportation service up and running during emergencies; they have a recovery rate of 100%;

  • dielectric oils are used for insulating transformers replaced after periodic checks carried out for maintenance purposes. They constitute hazardous waste and have a recovery rate in the three-year period of around 100%.

The waste sent for disposal sent for disposal consists mainly of materials deriving from infrastructure maintenance and cleaning activities (sludge, oily emulsions and rags containing solvent oils) and insulating materials containing asbestos, for which no form of recovery is envisaged. As in the previous two-year period, no significant spills of polluting liquids were reported in 2018..


The overall picture of all Terna's environmental data is available for download here.