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MYTILINEOS GROUP
SUSTAINABILITY REPORT 2011 |75
Other significant air emissions in tons of CO
2
equivalent
2011
NOx (fuel oil, natural gas, diesel fuel)
1,020.0
SΟx (fuel oil, diesel fuel, baking & consumption of anodes)
4,323.0
Ν
2
Ο (fuel oil, natural gas, diesel fuel, petrol)
16.1
CH
4
(fuel oil, natural gas, diesel fuel, petrol)
57.7
Fluoride emissions
222.9
PFC emissions
5.1
Particles
157.7
Pollution management and prevention - CO
2
emissions
In compliance with the requirements of Directive 2008/1/EC on Integrated Pollution Prevention and Control (“IPPC Directive”), the Company is committed to
applying Best Available Techniques, as the activities taking place in its facilities are included in the list of the aforementioned Directive. During 2011, no high
or medium gravity incidents took place involving environmental pollution or the leakage of hazardous substances to the environment. As regards total direct
CO
2
emissions, these in 2011 stood at 2,698,939.7 tons of CO
2
equivalent.
The Company’s initiatives to reduce greenhouse gas emissions in 2011 included the issue of the Environmental Terms Approval Decision concerning the
replacement of fuel oil by fuel oil and the completion of the construction of the network required, together with systematic activities and the development of
action plans to reduce PFC emissions.
Calculation methods
Emissions from fuel oil burning are calculated in accordance with the provisions of Decision 2007/589/EC (Annex II), using a national emission factor and
the corresponding Net Calorific Value (NCV). Emissions from the lime production process are also calculated in accordance with the same Decision (Annex
VIII). Emissions from the anodes baking and consumption process are calculated using the formulas of the IPPC guidelines, as these were adopted by Decision
540/2011/EC.
For calculating indirect carbon dioxide emissions, a conversion factor of 0.85 was used (i.e.: electricity consumption in kWh*0.85). More specifically, the factor
used was 0.85t CO
2
/MWh. This factor is weighted for the contribution from each type of energy source. In contrast, as no other calculation method was available
for 2010, the consumption of electricity was distributed using the contribution shares of non-renewable sources. It was later established that losses, which
effectively treble emissions, had not been factored into the calculations, and the Company’s emission records were amended accordingly.
NOx, SOx and other significant air emissions
Total direct and indirect greenhouse gas emissions in tons of CO
2
2010
2011
Direct greenhouse gas emissions from all sources owned or controlled by the Company
542,521.7
531,893.7
Limestone calcination (confirmed)
50,175.0
51,379
Fuel oil burning
248,401.6
258,370.8
Consumption of anodes in the electrolysis line
195,935.5
165,859.1
PFCs
33,825.3
38,980.6
Burning of volatile contents of tar (anodes production)
12,403.2
15,126.3
Insulation coke heating (anodes production)
1,781.1
2,177.9
Indirect greenhouse gas emissions from the production of purchased electricity, heat or steam
1,827,166.8
2,167,046
From lignite
1,074,374.1
1.228.281,7
From fuel oil
4,385.2
433,4
From natural gas
405,631.03
660.949
Total greenhouse gas emissions (direct + indirect)
2,369,68.5
2,698,939.7
ALUMINIUM S.A.
