TWIST++ – Paths of transition for water infrastructure systems: Adapting to new challenges in urban and rural areas

With a view to the long service life of water infrastructure equipment, its low level of flexibility and changing framework conditions, adaptation and development of the urban water systems are necessary. Technologies and concepts for new development areas have already been tested in a number of research and demonstration projects. However, existing systems need to be adapted as well. This is the starting point of the collaborative project twist++ (Transition pathways of Water InfraSTructure systems). In this project, integrative and long-term technological solutions will be developed which intelligently combine wastewater disposal and drinking water supply tasks and thus increase the flexibility of the overall system to adapt to future change. The project is supported by the cooperative efforts of fourteen institutions, including a number of research institutes, municipal partners, water and wastewater utilities and companies from the areas of planning, software/game development and facility construction.

The project is being carried out in three model areas: The city of Lünen in North Rhine-Westphalia, the rural municipality of Wohlsborn-Rohrbach in Thuringia, and the former coal mine Lippe/Westerholt, also in North Rhine-Westphalia, which stands as an example for a rehabilitation and conversion area in the midst of a residential area. The selected model areas have framework conditions which are representative for many similar places in Germany. This favors the transferability and long-term usability of the results.

Simulation game (Serious Game); © 2013 takomat GmbH

Concepts for transformation and/or development of water supply and wastewater disposal systems are to be designed on the basis of the current situation and future requirements in model areas and necessary technological components are to be developed. Examples include energy and nutrient recovery and self-purification of segments of the water supply network. The results are to be implemented on the basis of concrete planning options and verified. The new concepts are to be made accessible to experts and layman via planning support systems and a simulation game.


Fraunhofer-Institut für System- und Innovationsforschung (ISI)
Breslauer Straße 48 | 76139 Karlsruhe

Dr.-Ing. Thomas Hillenbrand
Tel.: +49 721 6809 119