Project meeting of STEP at the site of the company ATS - Agro Trading & Solutions in Hardegsen (Photo: DBFZ)

Biogas Biomass furnace

Project ID 03KB075

Demotreber - Optimized energy use of a wet food waste (spent grains) by the combination of biological, mechanical and thermal methods

Beer marc (Photo: TUM)


  • 01.10.2012 – 31.03.2015


Technical University Munich
Lehrstuhl für Rohstoff- und Energietechnologie
An der Maxhütte 1
92237 Sulzbach-Rosenberg

Severin Fleischmann – former project manager


03KB075B - Schneider Weisse G. Schneider & Sohn GmbH
03KB075C - Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Institute Branch Sulzbach-Rosenberg
03KB075D - Harburg-Freudenberger Maschinenbau GmbH

Associated partners

03KB075 - Voith Paper Environmental Solutions GmbH & Co. KG

Cooperation partners



Results only available in German.


The aim of this project is to combine the production of biogas with the combustion process for fiber-containing food waste (spent grains). By this method, the efficiency of energy use has to be increased by reducing the water content with a mechanical process. Spent grains consist of husks and protein agglomerates in combination with polyphenols. These protein agglomerates are pasty and become flexible under pressure. The separation of the biodegradable substances together with most of the water has to be made by pressing. For the thermal utilization, it is examined whether the use of wood fuels alone or a combination with the pressed spent grains is more efficient.


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