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18.6.2021 Comments welcome

Sustainable Biogas has published reports on the current usage of sewage sludge, and related nutrient leakage risks in Finland and Latvia. The project consortium welcomes any feedback on the reports.

Background and objectives

In project Sustainable Biogas, John Nurminen Foundation and Finnish and Latvian biogas associations and environmental authorities cooperate to improve the sustainability of climate-friendly biogas production from the water protection point of view. The project is financed by the Interreg Central Baltic programme. 

One of the project aims is to identify sustainable end uses for sewage sludge -based digestates in Finland and Latvia. Additionally, another aim is to promote the safe use of nutrient-rich digestates from biogas production as recycled fertilisers. Towards these ends, the feasibility of various end-use options for sewage sludge -based digestates will be discussed and elaborated with stakeholders in Finland and in Latvia. 

Reports on current situation

The process started in 2021 with descriptions of the current situation as regards the utilisation of sewage sludge -based digestates in the two focus countries. In the reports on current situation in Finland and in Latvia, particular attention was paid to end use volumes, existing regulations and observed nutrient leakage risks of practices.

The project consortium now welcomes stakeholder comments to the reports on current situation. Please send your feedback to anna.saarentaus[at]