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Combined steam drying and pyrolysis unit

Handling wastewater sludge for heating and biocharging

  • /

Combined steam drying and pyrolysis unit by AquaGreen implemented by Odsherred Electric Utility Company in Odsherred (Denmark) in 2022

Typical roi between 4 and 7 year

Combined steam drying and pyrolysis unit

Handling wastewater sludge for heating and biocharging

  • World Alliance Member
  • Featured Solution
  • Labelled Solution
Publication Date March 8, 2021
From Denmark
Maturity stage TRL 7 - Prototype testing in the real world

There is a growing concern about what to do with sewage sludge due to concerns of environmentally unfriendly pharmaceuticals, microplastic and chemical compounds (PAHs, furans, dioxins, NPE, LAS etc). In many countries, sludge is now incinerated instead of spread on land due to public health concerns. This creates a problem of locking Phosphorus in the ash making it very difficult and expensive to recycle it into the soil. Sludge can only be spread on land 3 months a year and the prolonged storage gives considerable GHG emission. AquaGreen dries and pyrolyses (heat to 650 °C) the sludge turning it into useful resources - energy and biochar w. phosphorus - solving environmental and climate problems of sewage sludge. It the farmer to better yields and the climate by storing CO2 in the ground when biochar is used as a fertilizer. It also supports future generations ability to grow plants by recovering phosphorus - an element which is listed as a critical scarce raw material by EU.

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Company Profile

AquaGreen

AquaGreen is a CleanTech company with unique patented technology upcycling dry and wet biomass to resources.

Headquarters 4000 Roskilde, Denmark
Type Startup or self-employed
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Networking Partner

Cleantech Scandinavia

Network of industrial companies, investors, real estate companies and cities; connecting to 1 400+ clean technology companies from the Nordics and Baltics.

Solutions Associated 17
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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator AquaGreen has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.