Flue gas emissions from the power plants are our most significant environmental impact.

CARBON DIOXIDE EMISSIONS DECREASED

In 2014, carbon dioxide emissions from energy production totalled EUR 3.2 million tonnes and specific emissions stood at 240 g CO2/kWh. Compared with the previous year, emissions fell by about 3% due to reduced fuel consumption.

Carbon dioxide emissions

g C02/kWh

 g C02/kWh
2010 260
2011 250
2012 250
2013 250
2014 240

Supplied energy

GWh/year

 Supplied energy
2010 14970
2011 13900
2012 13940
2013 13570
2014 13270

Specific carbon dioxide emissions

ktC02

 kt
2010 3700
2011 3300
2012 3400
2013 3300
2014 3200

EMISSION LIMITS EXCEEDED AT SALMISAARI

In 2014, sulphur dioxide emissions showed a clear reduction compared with the previous year. However, nitrogen oxide emissions increased slightly. At Salmisaari, the emission limits of sulphur dioxide and nitrogen oxide were exceeded in December due to the automation upgrade. The emission limits of other plants were not exceeded, but the automation upgrade in the autumn impeded the operation of the Salmisaari desulphurisation plant for some time, and it was compensated for by the use of low-sulphur coal.

Acidifying emissions

tons/year

 Sulpfur dioxideNitrogen oxides
2010 2490 5640
2011 1950 4460
2012 2370 4420
2013 2240 3890
2014 1960 4140



mg/kWh

 Sulphur dioxideNitrogen oxides
2010 180 390
2011 170 350
2012 180 330
2013 180 300
2014 160 320

Particulate emissions in 2014 remained at the previous year’s level. The increase in the particulate emissions from Salmisaari was compensated for by the improved situation at Hanasaari. 

Particulate emissions

tons/year

 Particle emissions
2010 120
2011 120
2012 120
2013 130
2014 127

 

mg/kWh 

 Particle emissions
2010 10
2011 11
2012 9
2013 10
2014 10

IMPACTS ON AIR QUALITY HAVE STABILISED

The annual average sulphur dioxide contents at the Vallila monitoring station, which describes the impacts of energy generation on air quality in Helsinki, were 1.9 µg/m3, or at the same level as in previous years.

Before the district heating era and combined heat and power generation, the annual average sulphur dioxide contents in the city centre of Helsinki were 50–100 µg/m3. These days, the air quality limit value is 20 µg/m3.

Sulphur dioxide of the Vallila station

annual average

 microg./m3
2010 2.2
2011 2.4
2012 2.1
2013 1.6
2014 1.9

IMPACTS ON WATERCOURSES ARE LOW

In 2014, heat released into the sea amounted to 191 GWh, or 1.5% of the used fuel energy. The load has varied between 180 and 2,200 GWh in the 2000s. In addition, 71 GWh of cooling energy was released into the sea.

CEMENT AND EARTH CONSTRUCTION MATERIAL FROM BY-PRODUCTS

Utilisation of fly ash in the manufacture of cement continued, and 63.5% of the ash was utilised. The rest of the fly ash was used in mine filling together with the end product of desulphurisation. Bottom ash was stored mainly at the Vuosaari intermediate storage.

Fly ash

 %
Fly ash
into
concrete
63.5
End use 35.5

Bottom ash

 %
Utilization 7
The interim
storage
93
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