ESiTI – Wastewater treatment plant of the future: energy storage in interaction with technical infrastructure is as a trade-off between energy production and consumption

Increasing flexibility of high-load digestion against the background of the energy revolution

© Fraunhofer IGB

Test reactor at the Fraunhofer IGB technical center.

© Fraunhofer IGB

Gas meter with electronic sensors for continuous recording of biogas production.

The ESiTI joint research project funded by the Federal Ministry of Education and Research (BMBF) is therefore pursuing the goal of developing a planning tool to increase the flexibility of energy flows in wastewater treatment plants. The partners are investigating how to increase the flexibility of energy flows based on technical, ecological, economic and social aspects. Sewage sludge treatment is a particular, since this both consumes energy and also produces and stores energy via digestion of the sludge to biogas.

In the framework of this project, Fraunhofer IGB researchers investigated the extent to which high-load digestion with and without microfiltration can be operated flexibly, when needed, without affecting the actual function. Tests at a lab-scale plant showed that applied impact loads and temperature changes (minimum 32°C, maximum 43°C) resulted in only slight reduction of digestion rate and digester gas production but not a failure of the digestion process.

Project information

Project title

ESiTI – Wastewater treatment plant of the future: energy storage in interaction with technical infrastructure as a trade-off between energy production and consumption

 

Project duration

May 2014 – April 2017

 

Project partners

  • Technische Universität Darmstadt – Institut IWAR, Fachgebiet Abwassertechnik (Gesamtprojektkoordination) und Fachgebiet Stoffstrommanagement und Ressourcenwirtschaft, Darmstadt
  • ENTEGA Abwasserreinigung GmbH & Co. KG, Darmstadt
  • blue move consulting GmbH, München
  • Clausthaler Umwelttechnik-Institut GmbH Cutec, Clausthal-Zellerfeld
  • EnviroChemie GmbH, Rossdorf
  • Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB, Stuttgart
  • Inter 3 – Institut für Ressourcenmanagement, Berlin
  • Dr. Born - Dr. Ermel GmbH, Achim

 

Associated Partners

  • Wissenschaftsstadt Darmstadt
  • entega AG, Darmstadt
  • Zweckverband Abfallverwertung Südhessen, Darmstadt

Funding

We would like to thank the German Federal Ministry of Education and Research (BMBF) for funding the project "ESiTI – Wastewater treatment plant of the future: energy storage in interaction with technical infrastructure as a trade-off between energy production and consumption", promotional reference 02WER1322H, in the
"FONA - NaWaM - ERWAS" program.