Sewage sludge safe to use in biogas and fertilizer production according to the study
A study coordinated by Natural Resources Institute Finland (Luke) examined the long-term fertilization effect of sewage sludge phosphorus on barley and ryegrass and transfer of contaminants to plants. According to the study, contaminants contained by sewage sludge were not transferred to above-ground plant parts. Gasum uses an annual total of around 200,000 tonnes of sewage sludge in biogas and fertilizer production. The company currently processes around a quarter of the volume of sewage sludge from Finnish municipal systems.Gasum processes a significant proportion, currently estimated to