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The Department of Urban Water Engineering at the University of Kassel focuses on the development of innovative strategies for sustainable and resilient water supply and wastewater disposal. The department is responsible for the overall coordination of the interdisciplinary Flexilienz research project.

One focus is on the management of work package 3 (WP3), which includes the design and implementation of ultrapure water treatment and hydrogen electrolysis. In addition, the department is involved in the scientific support of work packages WP1 (source water filtration) and WP4 (load management).

Städtische Werke Netz + Service GmbH (NSG) is responsible for the technical management of the water supply in Kassel. As part of its duties, NSG continuously reviews existing supply concepts and adapts them to new technical, ecological and economic requirements. As the operator of its own gas and electricity grids, NSG is well placed to address sector coupling issues efficiently and systemically.

In the Flexilienz project, NSG is providing the pilot sites, including the necessary infrastructure and operating data for the implementation of the individual work packages. In addition, NSG is actively contributing its technical and operational expertise to the planning, construction and operation of the demonstration plants.

As a non-profit and independent institution of the German Technical and Scientific Association for Gas and Water (DVGW), the TZW pursues scientifically sound and practical approaches to safeguarding the drinking water supply.

The Dresden branch is home to the Water Distribution Department and the Digitization Department. As a result, TZW has extensive project-relevant expertise in the areas of water treatment and distribution, data analysis, modeling and software development. It also operates a tried-and-tested system for short-term forecasting of water demand in supply areas.

As part of the Flexilienz project, TZW is responsible for creating availability and consumption forecasts for drinking water in the Kassel supply area. These form the basis for electricity price-dependent load management of the water supply in work package WP4.

The Fraunhofer IEE, based in Kassel, has been conducting national and international research into a sustainable energy supply based on renewable energies for over 30 years. The focus is on developing technical and economic solutions to reduce costs, ensure security of supply and promote digitalization in the energy industry.

A central research topic is the identification and use of flexible loads in the electricity grid, the importance of which is constantly increasing in the context of the cross-sectoral energy transition.

In the Flexilienz project, Fraunhofer IEE is analyzing the load shifting potential in the water supply system of the city of Kassel. The aim of work package WP4 is to determine the economic savings potential through electricity price-optimized control of energy consumption.

EnWaT GmbH is an internationally active company in the field of plant engineering for energy and water technologies. With many years of experience, EnWaT develops economically viable and sustainable solutions for water supply together with industrial and municipal partners. A particular focus is on the development of decentralized membrane filtration systems that meet the growing demands on water quality and supply security.

In the Flexilienz project, EnWaT is responsible for the design, development and installation of pilot plants for source water filtration and for the reuse of filter backwash water to produce ultrapure water. In addition, EnWaT is developing decentralized energy supply systems to make the plants energy self-sufficient as part of work package WP1.

Oppermann GmbH is a medium-sized engineering company headquartered in Vellmar near Kassel and was founded in 1923. Oppermann provides traditional engineering services in the field of municipal infrastructure, particularly in the areas of water supply and wastewater treatment.

As part of the Flexilienz project, Oppermann is taking on the task of ensuring that the technologies and operating concepts developed can be transferred to engineering practice. The company has access to a broad customer base and an extensive user network, which enables the practical implementation and scaling of the project results.