Thermal processes are used to desalinate and concentrate seawater, brackish water and industrial process water. In this field, the Fraunhofer Water Systems Alliance is concentrating on optimizing processes which make use of secondary wasteheat from industrial sources or which can be operated on energy from renewable sources such as e.g. low temperature solar systems.
At present, the Alliance is focusing on
- thermal solar membrane distillation
- solar desalination of seawater with a gravitation-supported vacuum evaporation plant
- generating drinking water from humidity.