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Water and Energy: An Interview with Mads Warming of Danfoss Energy & Water

Renewable Energy Magazine



On 16 November the International Energy Agency released its annual World Energy Outlook.
A key area of focus for the report was the interdependency of energy and water (the water-energy nexus), with a new chapter looking at how highly energy-intensive the water industry is, the impact this has on global consumption and CO2 emissions, and how we can unlock the significant, untapped scope for energy saving in this sector.

The Marselisborg area in Aarhus, Denmark (pop. 200,000) is the first place in the world that has succeeded in going from being an energy consumer to completely energy neutrality for the whole water cycle (tap water production, distribution, wastewater pumping and treatment). This has been achieved by securing massive energy savings across the water cycle, and by turning wastewater plants into net energy producers.  The Marselisborg Wastewater Treatment Plant, for example, has gone from consuming huge amounts of energy to being a power station in its own right – generating enough energy to cover its own operations and up to 100 per cent more, in addition to 2.5 GW of heat for the district heating system.

The company that runs the water system in Marselisborg is called Aarhus Water, and many of the advanced process control and efficiency technologies that have been used to achieve this improvement have been provided by Danfoss.

REM spoke to Mads Warming, Global Director of Water and Wastewater at Danfoss, to find out more.

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