The Plant


A waste-to-energy plant is needed

Not all waste can be recycled. The Westenergy Waste-to-Energy plant extracts energy from non-recyclable waste. 

The Waste-to-Energy plant is an important part of a well-functioning waste management system. The fuel used in the plant is waste that has already been separated at its source location, and recyclable material, such as glass, metal and recyclable paper, have been removed. Reusage and recycling will still be a priority as well as collection and treatment of hazardous waste.

The Waste-to-Energy plant can also extract energy from industrial waste that previously has been impossible to utilise because of economic or technical issues.

Waste bunker



Electricity and heating

Vaasan Sähkö Oy uses the steam produced in the plant to produce electricity and district heating.

The energy extracted from waste covers one third of the energy required by Vaasan Sähkö Oy for district heating. In addition, it is also sufficient to provide electricity for approximately 7 000 city apartments. This means that the amount of coal and oil needed for energy production can be reduced significantly.

The plant in figures

  • Building
    • 160 meters long, that is, about the length of a city block
    • 42 meters high, that is, higher than a 10-storey building
    • the height of the stack is 75 meters which makes it three meters higher than the tower of the Helsinki Olympic Stadium
    • the area of the building is 16 000 square meters
    • the foundation consists of about 19 000 cubic meters of concrete which would be sufficient to lay the foundations for  about 2 000 single family houses
    • the building site is 7 hectares
  • Technical data
    • total efficiency ratio is about 89 %
    • fuel efficiency is 63 MW
    • combusts more than 23 000 kilos of waste per hour
    • the boiler produces steam at a temperature of 400° C and a pressure of  40 bar
    • the steam is directed to a turbine that produces electricity with the electric capacity of 13 MW and district heating with the capacity of 40 MW
    • the plant operates approximately 8 400 hours in a year
    • the plant produces approximately 110 GWh of electricity and 350 GWh of district heating in a year