Wastewater treatment

Aarhus ReWater: The world’s most resource-efficient wastewater treatment plant

By 2029, Aarhus will ReWaterthe new resource and treatment plant, will replace Marselisborg, Åby and Viby wastewater treatment plants. In a few years, the three treatment plants will have insufficient capacity to treat the wastewater from a growing number of citizens in Aarhus Municipality.


Aarhus Vand


Process consultancy and design of process plants


Aarhus, Denmark



Producing surplus energy and using the resources in wastewater

The plant will be the world’s most resource-efficient wastewater treatment plant, making unprecedented use of wastewater resources and converting them into new materials, products and energy. It will be for the benefit of the environment, citizens and society.

Circular economy flagship

The project will be a flagship for the circular economy in Aarhus Vand and will pave the way for the water company to be energy andCO2-neutral by 2030. Envidan is realizing this ambition together with sub-consultants KWR Water Research Institute, DHI and Royal HaskoningDHV Nederland B.V.

This pleases Morten Fjerbæk, Business Developer at Envidan, who says: “We are of course extremely proud that we, together with our Dutch sub-consultants, have been appointed as Aarhus Water’s process consultant on this assignment. Our employees are driven by professionalism and personal development, and the fact that we will be a central part of the largest and most innovative treatment plant project in recent Danish history for the next many years gives Envidan a unique opportunity to offer our employees just that.”

Envidan is responsible for the design of the overall process plant

The task as process advisor was put out to tender in an innovation partnership, and the choice was based on a prior six-month innovation process with Aarhus Vand. Claus Møller Pedersen, Director of Business Development at Aarhus Vand, says about the assignment:

“As process consultant, Envidan will assist Aarhus Vand with the design of the overall process plant for Aarhus ReWater – from the initial selection of technologies and resources for utilization to the final design. It is very complex, but Envidan is among the foremost in the field of resource utilization at treatment plants, and together with the two sub-consultants, we now have a very strong team that I am confident can solve the task.”

Following a tender process, Aarhus ReWater has selected Henning Larsen for architectural consultancy and Aarsleff as turnkey contractor. The construction of Aarhus ReWater is scheduled to run until 2029, when the plant is expected to be operational. The plant is then expected to be continuously expanded until 2050, when the capacity will reach the equivalent of the wastewater discharge of 600,000 people.

Contact me
for more information

Claus Kobberø


+45 27 15 37 90


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