Gasum develops wastewater sludge nutrient recycling

Gasum is developing new concepts to recover and recycle the nutrients in wastewater sludges.

Biogas has a key role in recycling the nutrients in sludges and the production of renewable transport fuel as part of energy-efficient sludge processing. The processing of wastewater sludge and recovery of nutrients in concentrated, high-quality forms has been an active subject of research in Finland and globally in recent years, said Gasum.

The company’s two-year Järkki project, supported by the Ministry of the Environment in Finland, seeks to combine new wastewater sludge processing technologies into centralised processing concepts and will use lifecycle assessment to evaluate their environmental sustainability.

“A holistic perspective is called for in sludge processing where existing and emerging technologies can be combined in the best possible way, taking into account the logistics relating to both the sludges and end products,” said Viljami Kinnunen, senior development engineer at Gasum.

The total cost of the Järkki project is around €245,000, of which the Ministry for the Environment has granted funding of €98,000.

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