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

Heat Power Biomass technologies Validation market potential System studies

Project ID 03KB117

BioAuto - Optimization of thermal biomass use by autoclaving

Foliage disposal (Photo: Stadtreinigung Hamburg)


  • 01.12.2016 – 31.01.2021


Institute of Environmental Technology and Energy Economics (IUE), Hamburg UNiversity of Technology
Eißendorfer Straße 40
21073 Hamburg

Prof. Martin Kaltschmitt – project manager
Telephone: +49 (0)40 42878-3008


03KB117B - ETH Umwelttechnik GmbH
  • Address:
  • ETH Umwelttechnik GmbH
    Einsiedeldeich 15
    20539 Hamburg
  • Contact:
  • Stefan Breitkreuz – Projektleiter
    Telefon: +49 (0)40 781107-37

Associated partners

Cooperation partners

03KB117 - Stadtreinigung Hamburg A. ö. R.


Subject and aim

In municipal waste disposal, a large number of biogenic material streams are present that are currently only available to a small extent or not at all for energy use and are not prepared for high-quality composts. In most cases, a more energetic use of fuel is not possible for certain fields of application and, in some cases, storage capability is limited. Against this background, the aim of this project is to investigate an innovative treatment process based on autoclaving for different biogenic residues, by-products and waste materials, to produce a high-quality, dewatered, storable, biogenic solid fuel with defined fuel properties. In particular, green and lawn cuttings, foliage and other biogenous material streams are to be investigated as feedstocks.


At the IUE of the Technical University Hamburg, the basic process parameter of the autoclaving system is determined during preliminary tests at a pilot plant and the products obtained are comprehensively characterized. The essential design parameters for the implementation of the demonstration plant are also determined. Subsequently, tests are carried out at the demonstration facility in order to verify the results of the preliminary tests as well as the simulations carried out during the project, and finally to carry out an assessment and evaluation of the process.

In the framework of the project, ETH Umwelttechnik GmbH carries out the mechanical pretreatment and characterization of the material streams for subsequent autoclaving. In addition, the process costs and the market potential of the generated solid fuels are analyzed on the basis of the results of the demonstration plant.

Stadtreinigung Hamburg
Stadtreinigung Hamburg supports the project in almost all phases. It also provides the material streams to be examined.



  1. Test operation
  2. Product characterization
  3. Experimental demonstration plant
  4. Process optimization
  5. Simulation and balancing
  6.  Evaluation and assessment


  • Characterization of input material streams
  • Preparation of material streams
  • Mechanical pretreatment
  • Cost analysis and market potential

Stadtreinigung Hamburg

  • Material flow provision
  • Site analysis
  • Design of demonstration plant
  • Test support
  • Balancing
  • Evaluation and assessment


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