The purpose of the project is: - To map and assess the potential for a water utility to adapt current operating practices to respond to the needs of a the electricity system through a flexible demand driven by a market signal for electricity; and by extrapolation to estimate the potential for the entire Danish water utility sector. - To test - on actual full scale production facilities - new price flexible operating practices in order to gain knowledge of how much and for how long consumption may be postponed - without endangering existing processes and facilities, and identify R&D needs to drive flexibility further. - To test existing technologies (eg. small-scale hydro) in the water infrastructure to gain process experience with the technology and determine suitability in a complex process system such as a wastewater treatment plant or waterworks, and thus to explore the potential for water utilities being both RE (renewable energy) producers and energy storage facilities. Expected findings The primary result of the project will be a qualitative assessment of the potential for the water sector towards contributing to a price-responsive electricity system. The result will be expressed in terms of energy flows and the associated economic parameters – i.e. how great is the immediately available potential for dynamic electricity use, how large is the potential where further R&D is needed before a more dynamic energy utilisation mode can be realised, and finally how much energy consumption is not likely to become price-responsive in the near future. This will be presented with the first indicative practical experiences with currently available technology and hands-on experience with price-flexible operating practices and how this will aid the water utility – together with producing energy locally – to move towards CO2 neutrality. Finally the project will present an assessment of the societal costs and benefits in terms of economy, environment and energy security.