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
Specific carbon dioxide emissions
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.
|Sulpfur dioxide||Nitrogen oxides|
|Sulphur dioxide||Nitrogen oxides|
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.
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
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.