Water and energy are fundamental pillars for economic and social development worldwide and they are inextricably linked: Water is needed for different stages of energy production and energy is required to extract, supply, distribute and treat water and wastewater. As global demand for both energy and water is set to increase significantly over the coming years, this interdependency will have significant implications for both energy and water security.
According to the International Energy Agency (IEA), the water sector’s energy consumption is projected to more than double by 2040. However, a rise in water demand does not necessarily have to mean an equal rise in energy consumption. If the existing potentials of energy efficiency and energy recovery in the water sector are utilised, the sector’s energy consumption can actually be reduced by 15 percent in 2040.
Unlocking the potential of wastewater
On a global scale, less than half of all wastewater is collected and less than one fifth is treated. This has led to severe environmental degradation of many inland and sea waters around the world. This white paper provides lessons learned from Danish stakeholders within wastewater treatment.
From wastewater plant to power plant
At Marselisborg Wastewater Treatment Plant we in Aarhus Vand produce 50 percent more energy than we use. By implementing energy efficient solutions and producing biogas from the sludge, we are almost able to cover the energy consumption for the whole water cycle from the groundwater extraction, to pump stations, water distribution and wastewater treatment.
Egaa Wastewater Treatment Plant is transformed to energy producer
Total energy renovation of the treatment plant at Egaa, just outside Aarhus, means that Aarhus Vand is setting new standards for developing treatment plants from energy guzzlers into energy producers. This has happened through entirely new technologies that exploit the green energy-production potentials in wastewater. The topping-out is a milestone in the technological development of […]
In Aarhus, the second largest city in Denmark, a new waterworks has been built, Truelsbjerg waterworks. Besides its primary function of producing water of high quality, it will serve as a reserach and test centre. Classic waterworks concepts have been rethought to take drinking water safety to new levels, and the waterworks is also designed […]
New Plant to Treat Green Waste and Wastewater
Last year, the European Regional Development Fund (ERDF) awarded approx. DKK 5 million to uncover the possibilities of transforming green waste into energy at a wastewater treatment plant in Vejle, Denmark. After initiating the reconstruction of the plant, the project is off to a good start.
Sludge Treatment Plant Provides Copenhagen With Clean Energy
Disposal of sludge from wastewater treatment plants in large cities is an environmental problem , however there are solutions. In Copenhagen, a new sludge incineration plant has been put into operation in 2011 at the plant Lynetten owned by BIOFOS, jointly owned by 15 municipalities in the central part of the Copenhagen region. As part of the […]
New pumps leads to significant energy savings for waterworks
”They’ve been overtaken by developments!” With this brief statement, sales engineer Poul Bøgelund from Grundfos sums up the reasons why many Danish waterworks now face very high electricity bills for powering their old systems. ”Many systems date back to the days where consumers and businesses simply used water without any thought to water conservation. And […]
Wastewater and seawater tested as sources for Copenhagen district heating
A new heat pump in Copenhagen will collect energy from both wastewater and seawater and test how the energy can be used in district heating. The capacity of the heat pump corresponds to district heating for 1,100 Copenhagen households.
Cleaning wastewater with energy surplus
With the help of Danfoss drives, the Aarhus wastewater treatment plant in Denmark not only ensures clean water – it also produces more electricity and heating than it consumes. Water and wastewater facilities account for the largest consumption of electricity in most municipalities, typically 25-40% of the total energy use. In the Danish city of […]