Key Takeaways
- NPHarvest, a Finnish cleantech company, launched its first German pilot installation at Biogas Westerbakum GmbH in Lower Saxony on March 10, marking its entry into Europe's largest biogas market.
- The demonstration unit processes approximately 20 cubic meters of liquid digestate per day and can recover up to roughly 26 tons of nutrients per year.
- Germany has over 9,700 biogas plants operating under tightening EU nitrate rules that cap nitrogen application at 170 kg per hectare per year in vulnerable zones.
- NPHarvest's membrane-based technology can capture up to 90% of nitrogen and phosphorus from liquid waste streams, producing ammonium sulfate and calcium phosphate.
- The company has raised 2.2 million EUR in prior funding and was recently selected for up to 1.2 million EUR under Business Finland's Deep Tech Accelerator program.
Finnish Firm NPHarvest Enters Germany's Biogas Sector
NPHarvest, a cleantech spinout from Aalto University, has activated a four-month pilot installation at Biogas Westerbakum GmbH in Lower Saxony, Germany. The unit began operating on March 10 and is designed to process around 20 cubic meters of liquid digestate per day, recovering up to approximately 26 tons of nutrients annually.
Regulatory Pressure Reshaping Digestate Management
Germany's more than 9,700 biogas facilities face mounting constraints under EU and national fertilizer rules. The EU Nitrates Directive limits nitrogen application to 170 kg per hectare per year in vulnerable zones, and Germany has enacted stricter measures to address nitrate levels in groundwater. Rising transport costs for digestate are compounding the challenge, creating demand for on-site nutrient processing options.
How NPHarvest's Technology Works
The company's membrane-based process recovers up to 90% of nitrogen and phosphorus from liquid waste streams without energy-intensive stripping, producing ammonium sulfate and calcium phosphate suitable for fertilizer use. The modular system is offered as a plug-in to existing biogas infrastructure and does not interrupt ongoing plant operations. Early performance data from Westerbakum has been cross-verified with an external laboratory in Oldenburg.
“Biogas plants were designed to produce renewable energy, but they also generate nutrient streams with substantial untapped value,” said Dr. Juho Uzkurt Kaljunen, CEO of NPHarvest. “We see nutrient recovery as a structural advancement for the sector, enabling operators to enhance asset productivity without expanding their physical footprint.”
NPHarvest Sees Strong Operator Interest in Germany
The German deployment follows an industrial-scale demonstration at a biogas plant in Ankara, Turkiye, and field trials at the University of Helsinki's Viikki research farm, where recovered nutrients matched the performance of synthetic fertilizers. The company has secured 2.2 million EUR in prior funding from Nordic Foodtech VC and the Finnish Ministry of the Environment, and was recently selected for up to 1.2 million EUR under Business Finland's Deep Tech Accelerator program.
“Plants are under increasing pressure to manage digestate more efficiently, and there is clear demand for solutions that can turn that burden into a usable product with economic value,” said Milan Hofmann, Managing Director at Varea Water, NPHarvest's regional project developer in Central Europe and the UK.
