• Ida-Viru County without ash hills

    At present, energy in Estonia is still mainly produced from oil shale because the alternatives do not yet generate the required volumes. The production of oil shale energy generates over 1 million tonnes of ash waste every year and by valorising this, we can contribute significantly to the reduction of the environmental footprint of our energy generation as a solution which is necessary today. A cleaner living environment in Ida-Viru County and throughout Estonia.

Ragn-Sells introduced oil shale ash valorisation project in Narva-Jõesuu

On 29 June, the representatives of Ragn-Sells AS met with the representatives of the local government, entrepreneurs and people of Narva-Jõesuu to introduce the idea of a plant based on an innovative oil shale ash valorisation process which will help to significantly reduce the environmental impact of oil shale ash in the future. The company plans to file an application for the initiation of a special spatial plan to the local government soon.

TALTECH Professor Andres Trikkel explains what the calcium carbonate obtained from oil shale ash is

Synthetic calcium carbonate represents the biggest share of the materials produced from oil shale ash. The food and pharmaceutical sectors are the best examples of industries in which natural calcium carbonate is used. As this material originates from the manufacturing industry, the calcium carbonate produced from the oil shale ash of Ida-Viru County will most probably be used as a filler in the paint, plastic and paper industry.

Oil shale and oil shale ash

Oil shale is a black or brown fine-grained sedimentary rock containing kerogen. Oil shale consists of organic matter that has not fully degraded (up to 70%) and various minerals. Organic matter usually consists of kerogen, which is formed from the degradation of algae or bacteria. The quantity of oil shale ash generated in a year is 15 times bigger than the quantity of municipal waste. The use of oil shale generates large quantities of waste products – ash and semi-coke. For example, approximately 5 to 7 million tonnes of ash and a million tonnes of semi-coke is generated in Estonia every year at the current pace, and only a very small amount of it is recovered.

Archimedes supports the oil shale ash research project of Ragn-Sells with 200,000 euros.

The Archimedes Foundation supports the scientific research of the technology required for the treatment of oil shale ashes that environmental company AS Ragn-Sells is currently working on with more than 204,000 euros. The support granted within the scope of the programme Applied Research in Smart Specialisation will be used for the research overseen by Ragn-Sells and carried out by the scientists of TalTech and the University of Tartu, which is aimed at finding the best technological solutions to the valorisation of oil shale ashes.

Greenhouse gas emissions in Estonia are decreasing but are still among the highest in Europe

The total greenhouse gas emissions in Estonia have decreased by 4.5 percent in comparison with the year before and more than twice in comparison with 1990. In 2018, the amount of greenhouse gas emissions in Estonia was equivalent to 20 million tonnes of CO2. The majority of greenhouse gases in the industrial sector – 88% – was generated in the energy sector, 7.2% came from agriculture, 3.1% from industry and 1.6% from waste management.

Innovation for recovery of elements in oil shale ash

The scientists of the Tallinn University of Technology and the University of Tartu and the team of Ragn-Sells AS are developing an industrial technology for the separation and recovery of the elements found in oil shale ash, following the example of similar circular economy projects implemented in Sweden. Releasing a large waste segment into circulation by way of valorisation has two benefits from the viewpoint of environmental sustainability because the quantity of waste is reduced and the primary production of several materials can thereby be reduced as well. 

How is oil shale waste generated?

Energy production in Estonia is largely based on oil shale. Although the share of renewable energy is increasing, it still remains at around 30% per year. The remaining electricity is mainly generated from oil shale. The share of electricity generated from renewable energy sources in the total consumption of electricity has increased every year and reached 19.7% in 2018, which is an increase of 5.7% in the last five years.

Ragn-Sells starts testing valorisation of oil shale ash

Swedish environmental company Ragn-Sells entered into a cooperation agreement with Eesti Energia for finding solutions to the valorisation of oil shale ash and its release back into circulation. The new technology currently being tested helps solve one of the challenges of oil shale energy in Estonia – what could be done with the by-product of energy generation, i.e. bottom ash? Approximately 80% of the energy generated in Estonia is produced from oil shale. This creates large quantities of by-products, such as bottom ash, which is currently mostly deposited.