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

sector coupling | CHP Heat Power Biogas Biomass technologies Validation market potential System integration System studies

Project ID 03EI5408

Stramento - Demonstration of an innovative process for the efficient production of biogas and fertilizer from grain straw

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  • 01.02.2020 – 31.01.2023


Herbst Umwelttechnik GmbH
Goerzallee 305e
14167 Berlin

Dr.-Ing. Leonhard Fechter - project leader
Telephone: +49 (0)30847 18 300

Dipl.-Ing. Marcel Spahr - direct contact person / project coordinator
Telephone: +49(0)30847 18 388

Alexander Malik - further contact person
Telephone: +49(0)30847 18 325


03EI5408B - Technische Universität Berlin

Associated partners

Cooperation partners

03EI5408 - agt Trebbin eG
  • Address:
  • agt Trebbin eG
    Trebbiner Str. 12
    14959 Trebbin OT Klein Schulzendorf
  • Contact:
  • Telephone : +49(0) 033731 890



Planned results:

  • Plant level: methods, pilot plant, demonstration plant, plant/system components, retrofitting existing plants
  • Concept level: plant concept
  • Market level: license, patent, market ready technologies & components
  • Data level: methods, database, test series/-program
  • Publications: scientific paper (ISI, peer-reviewed)


The project addresses the fermentation of domestic cereal straw into biogas. It is based on the patent-pending process for the fermentation of rice straw. The core of the project is the construction and operation of a pilot plant using cereal straw as the primary substrate.
The project is carried out in close cooperation between the project partners Herbst Umwelttechnik GmbH and the Technische Universität Berlin (Department of Circular Economy and Recycling Technology).


The aim of "Stramento" ( lat. made from straw) is to achieve an integrated energy and nutrient use of lignocellulose-rich agricultural residues through an innovative biogas process and thus to sustainably reduce greenhouse gas and nutrient emissions as well as improve soil functions in addition to providing biogas and fermentation residue substrates.


HUT - Herbst Umwelttechnik GmbH

WP 1: Coordination and management of the Stramento project: Planning of interim reports, meetings, presentations, publications as well as networking with other research institutions.
WP 3: Laboratory experiments with the loop reactor and cereal straw, essential and efficiency-enhancing operating parameters are determined for later plant operation. 
WP 4: Design and construction of pilot plant on site in Trebbin
WP 5: Commissioning and operation of pilot plan over a sufficiently long stable and representative period. 
WP9: Development of plant concepts for the construction of new plants or the equipping of existing plants with the loop reactor. 

TUB - Technische Universität Berlin

WP2: Investigation of biomass potentials for straw and other lignocellulose-rich waste; characterization of straw occurrences concerning chemical, physical, and biological parameters; analysis of the regional distribution of straw sources; project-internal database which is interoperable with existing information systems for biomass potentials. 
WP 6: Evaluation of fertilizer and soil conditioner as well as possible qualities in terms of fertilizing effect and pollutant content; investigation of emissions from fermentation residue handling, and application. 
WP7: Experimental quantification of process-specific greenhouse gas emissions; measurements of gases N2O and CH4 from diffuse sources. 
WP8: Quantification of the climate protection potential of the Stramento-approach; development of a material flow, energy, and greenhouse gas balance.


HUT - Herbst Umwelttechnik GmbH

  • Process technology and business models

TUB - Technische Universität Berlin

  • Material flow-oriented regional and spatial assessments
  • Biomass potential analysis


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