

Nutrient loads and oxygen depletion in lakes, rivers and the Baltic Sea. Hormonal compounds in wastewater. Industrial effluent in waterways. They all demand high-quality and reliable wastewater treatment now and in the future. Sewage sludge is already being used to produce heat and electricity – in the future, could the nutrients it contains be used as raw material for recycled fertiliser products?
Although sewage loads to watercourses are only a fraction of what they were at worst, there is still room for improvement. In addition to nutrient removal, new challenges include microplastics and other harmful substances. New compacts and more efficient processing methods are continually being developed.
The expansion of sewage plants, the regional concentration of wastewater treatment and the tightening of permit conditions require increased capacity of existing water treatment plants and more efficient processing. Old water treatment plants may be nearing the end of their service life, in which case an entirely new plant is needed in either the same or a different location.
Water treatment plants built inside excavated bedrock allow the plants to be built near residential areas, with minimal environmental impact. In underground enclosed areas, BIM and 3D modelling can – and should – be exploited.
We are Finland’s most experienced designer of underground sewage treatment plants. We have been involved in designing rock-excavated plants in Helsinki, Tampere, Espoo, Turku, Lahti, Nurmijärvi and Mikkeli.
As the leading expert in the design of wastewater treatment plants, we offer the best, practically proven solutions for different needs.
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