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AquaGreen ApS

AquaGreen ApS

About AquaGreen ApS

You get a future proof solution for sludge management with AquaGreens unique HECLA technology. Get rid of all your organic pollutants, reduce your sludge handling cost and become carbon negative and energy positive.


Founded: 2014

Employees: 11-50

HQ: Roskilde

Organisation type: Company


Carbon capture, storage and utilisation

District heating

Energy recovery from wastewater

Recycling of waste to material

Wastewater management

AquaGreen is a Danish Cleantech company that has developed a patented integrated steam-drying and pyrolysis solution treating wet biomass. Initially we focus on municipal wastewater sludge. Our solution is by many considered world-class, eliminating even PFAS, operating continuous and unmanned and generating 5 times more power than it use.

The integration of sludge drying and pyrolysis, enables an optimal energy efficiency where the sludge can be dried without the use of external energy. The process is continuous and fully automated via the use of more than 100 sensors. It gives a very flexible solution that can treat both digested and undigested sludge with varying levels of dry matter (18-28 %) and energy content, without operator intervention.

The biosolids biochar produced is being sold for urban landscaping and many new applications are being investigated. Please contact us if you are interested in testing biosolids biochar in your application.

We have sold 6 solutions in Denmark and Sweden and 2 HECLA Setores 1.000 solutions treating sludge from 40-50.000 people are in operation and commissioning in Denmark and 4 projects are underway.

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