Optimized concept for the maintenance of grease traps to reduce pollutants and recover resources (FAFODI)



European Union, European Regional Development Fund, Interreg Austria-Bavaria 2014-2020



Project Duration:

11/2018- 10/2021


Project Partners:

  • Institut für Infrastruktur, Universität Innsbruck
  • Universität der Bundeswehr München
  • Abwasserverband Achental - Inntal – Zillertal
  • Dr.-Ing. Steinle Ingenieurgesellschaft für Abwassertechnik mbH, Weyarn
  • Abfallwirtschaft Tirol Mitte


Project Descripiton:

Fats, oils, and greases (FOG) in wastewater cause problems in sewer systems and result in additional oxygen demand in wastewater treatment plants. On the other hand, FOG can be used to generate renewable energy. The installation of grease traps in restaurants and similar establishments is state of the art. In practice however, the implementation and operation of grease traps is often unsatisfactory. Also, the environmental and economic consequences of poorly maintained or even absent grease traps cannot be evaluated, due to lack of reliable data.

The findings of this project will contribute to the assessment of technical, economic, and environmental optimization potentials. Based on a model region, the effects of optimized grease trap maintenance on the efficiency of FOG separation and FOG pollution of the wastewater will be analyzed. An optimized concept for the maintenance of grease traps in the model region will be elaborated, implemented in practice and the effects on the wastewater recorded. Also, different grease trap systems will be evaluated for their potential to reduce pollutants (FOGs, micro-plastics), as well as for the quantity of collected FOGs. A research on the release of micro-plastics into the environment through grease traps is currently carried out using the wastewater treatment plant’s grease trap as an example. With energy production in view, the quality of the collected FOG will be analyzed to evaluate its suitability for biodiesel production. Also, the economic and environmental effects of the optimized concept will be assessed. One of the main points is the implementation of the gained knowledge into practice, in the final stage of the project. Already in the application phase, several associations and stakeholders have demonstrated their interest to participate in the project.


Contact Information:

Universität Innsbruck
Univ-Prof. Dr.-Ing. Anke Bockreis
Technikerstrasse 13
6020 Innsbruck

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