The Waste-to-Energy plant is environmentally-friendly and efficient

Stringent emissions and efficiency requirements served as the basis for the design of the Waste-to-Energy plant. The Waste-to-Energy plant, which will handle a maximum of 120,000 tonnes of waste each year, is the primary solution for meeting all the district heating needs for the City of Salo, as 90% of the district heat can be produced by energy from waste.

The Waste-to-Energy plant will replace the fossil fuels in primary energy production, thus making the energy it produces even more environmentally-friendly. The Waste-to-Energy plant will produce less emissions than a power plant running on coal or oil, thus providing significant benefits from a climate standpoint.

Emissions in line with the environmental permit

The Waste-to-Energy plant is equipped with a high-efficiency, multi-phase flue gas treatment system, which ensures that any impurities found in the flue gases being discharged into the air are well below the emission limits specified in the environmental permit.

Plant emissions are tightly regulated and measurements are taken constantly. The Regional State Administrative Agency issued an environmental permit decision on 7 May 2018 for the Korvenmäki Waste-to-Energy plant, and the plant will be built in accordance with the terms of the permit decision.

An appeal has been filed against the Waste-to-Energy plant environmental permit and is currently being processed by the Administrative Court of Vaasa. Because the environmental permit grants permission to begin plant operations despite the appeal, the appeals process will not prevent construction work on the plant from starting.

The environmental permit can be found in its entirety on the Regional State Administrative Agency Lupa information service (Finnish and Swedish only) Lupa-Tietopalvelusta

Waste-to-Energy plant annual emissions (kg)

The estimated maximum WtE plant emissions fall well below the limits specified in the environmental permit.

Information on emissions in line with the environmental permit

Carbon dioxide

The plant's carbon dioxide emissions will be no more than 50,700 tonnes a year. Half of all the emissions come from district heating production, with the rest coming from waste processing. When taking the reduction in emissions produced by the waste processing chain into consideration, there are clearly fewer emissions. The emissions produced by district heating are reduced when peat, coal and oil are replaced by waste as a fuel source.


Waste from Southwest Finland is transported over long distances to be processed elsewhere in Finland and abroad, such as to Stockholm and Tallinn. Thanks to the Korvenmäki Waste-to-Energy plant, it will no longer be necessary to make long-distance waste shipments. An average of 40 truckloads of waste fuel will be brought to on weekdays.

Noise, odour and dust

The plant will not generate any additional odours or noise in the area. Waste is unloaded and stored indoors. Exhaust air is not discharged directly outside. It is used as combustion air in the WtE plant boiler, thus keeping odours effectively contained.
Outdoor plant areas will be asphalted to keep dust down. Fuels, ashes and chemicals will be handled, stored and transported so that no dust is produced.

Ash produced by the plant

Boiler slag, boiler ash and fly ash is shipped for post-processing in their own, separate fractions. Metals are separated from the boiler slag and sent for reuse. Depending on its quality, every effort is made to refine boiler slag to make it reusable. Boiler ash and the end products of flue gas treatment are processed, if necessary, and properly disposed of.

Energy from waste - for a cleaner tomorrow

  • The Waste-to-Energy (WtE) plant lowers the greenhouse gas emissions produced by energy production and waste transports.
  • Landfills emit a large amount of greenhouse gases and have been prohibited since 2016. Energy from waste is an alternative to landfills with considerably lower emissions.
  • Reduced methane emissions
  • More efficient recycling of waste
  • Natural resources are conserved - waste is similar to peat as a fuel and better than wet wood
  • Controlled incineration ensures that the waste is incinerated cleanly
  • Flue gases are scrubbed thoroughly
  • The plant site is kept tidy and clean

For comparison

6-7 days worth of waste can be stored in the waste bunker

360 tonnes of waste will be incinerated each day

The plant will use less than 95 m3 of water each day

The difference in the area's current noise levels is 1-2 dB

Over 98% of the municipal waste of the region is utilized