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

Biomass gasification System studies Strategy development

Project ID 03KB088

IbeKET - Innovative demand-adapted municipal energy carrier concept

Small combustion plant (Photo: DBFZ)


  • 15.09.2013 – 31.01.2016


ttz Bremerhaven
Am Lunedeich 12
27572 Bremerhaven

Andreas Schonhoff – former project manager

Telephone: +49 (0) 471 809 34-200


03KB088B - florafuel AG
03KB088C - Stadtwerke Rosenheim GmbH & Co. KG
03KB088D - DBFZ Deutsches Biomasseforschungszentrum gemeinnützige GmbH
03KB088E - LUTRA Mittelbrandenburgische Hafengesellschaft mbH
03KB088F - Holzenergie Wegscheid GmbH

Associated partners

Cooperation partners


03KB088 - Universität der Bundeswehr


Results only available in German.


Within the project IbeKET five project partners have come together to study the use of biomass such as leaves, green waste and water maintenance material for energy utilization. The recovery of less and not used non-woody biomass for the generation of electricity or heat by using combustion and gasification technologies serves the substitution of fossil fuels and cultivated biomass. The project is mainly focussed on the development of a regionally transferable concept of thermal and thermo-chemical utilization and the demand-adapted and decentralised application of these materials. The concept development is based on the practical application and the interlocking of the involved partners’ individual technologies. These include the necessary conditioning/preparation (minimising critical parameter, pelletizing) of the input materials as well as their energy recovery.


Conceptual objectives are the development of a transferable concept for providing, processing and the energy use of the mentioned material as well as aiming for an implementation at the location of LUTRA GmbH. With regard to technical conditions the energy use of the mentioned biomass in accordance to the given framework should be enabled in principle. This purpose requires the interlocking of single process steps which need to be modified as well as the development of a design for fuels for recovery in small combustion systems and gasifiers.



As project coordinator, ttz Bremerhaven does with regard to content the coordinating of all project-parts and technical interfaces. Furthermore internal and external communication within the project is carried out by ttz. Beside organisational tasks in relation to the consortium or external institutions also representing of the project at technical meetings such as fairs and congresses, project-related publications as well as the processing of formal project issues is in the project coordinators’ field of activity.


A key aspect of florafuels’ work package is the processing of each material which will be analysed. All studied materials will be brought to a treatment by the florafuel process. This includes in addition to washing and drying steps also the pelletising of the materials. After accomplishment of the first combustion/gasification trials with pelletised materials from the florafuel process the necessary adjustments to the systems engineering (e.g. modification of the pelletising unit) are possible. Bases are the results which will be generated by other work packages of the project. Optimal operating parameters as well as a product improvement shall be generated by the consistent exchange between all partners. In addition, the evaluation of the performance of treatment needs to be enabled and the optimisation of output materials is carried out by the use of a before-after comparison.

Stadtwerke Rosenheim

First, the pilot plant in Rosenheim should operate with different mixed pellets (grass, leaves, roadside vegetation) to study the general suitability of the materials for energy use in gasification. Findings are expected in relation to the fusibility of fuel ash. To analyse the technical feasibility and stability of the technology the three mixed pellets with the best gasification results shall be tested in long-term experiments of the existing demonstration plant. If necessary, technical improvements of the plant will be done. The results will be evaluated in relation to technical, ecological and economic aspects. Finally, these aspects will be implemented in a QA system.


DBFZ is involved with three work packages in the project IbeKET, covering the content of the whole process from conditioning of input material to thermal/thermochemical recovery by different interfaces to other work packages.

As overall work package the accompanying laboratory analyses cover all necessary studies. The results of the analysis of different materials (e.g. input material or pellets) are used as the base for the work of the other partners.

In the fuel characterization the properties of various input materials will be elaborated by a before-after-comparison (in relation to the treatment). The evaluation of materials is based on own studies, norms and literature, therefore the estimation of the applicability of different biomass shall be given.

In relation to the conditioning and pelletising of the produced fuels, optimal fuel (e.g. particle size , water content) and process parameters (e.g. die roller distance, geometry of the press channel, mass flow) will be determined. Pelletising of processed material for lab analyses and combustion tests will be realised in a pilot plant stations scale.

Furthermore the development of a suitable QA-system is planned. The focus is on the development of a recipe for pellet production by means of additives or binder agents, which allow that independent of the origin of the materials high quality pellets can be produced.


Within the work package "regional concept" the quantity of eligible input materials will be analysed by means of a potential analysis (quantities, locations, type, etc.). This is done location-based for the LUTRA GmbH. Furthermore, the planning and establishing of a logistic chain for procuring the biomass shall be implemented. The technical and legal frameworks which are implicated by an intended practical implementation will be analysed too. Finally, a regionally transferable concept shall be generated, which considers the ecological and economic aspects and is useful for municipalities, industrial and waste management companies or agricultural cooperatives application.



  • Coordination of project implementation performance 
  • Substantive guidance and support of the project
  • Coordination among project partners 
  • Organization


  • Plant optimization
  • Fuel Deployment
  • Reduction of critical substances in terms of combustion and gasification

Stadtwerke Rosenheim

Activities focus on gasification experiments, at which especially the metrological documentation of the trials and the gas quality are important. Due to the high ash content and the chemical composition of biogenic residues problems in relation to the process are expected and shall be solved by iterative optimisation steps.


  • Fuel characterization 
  • Pelletising 
  • Pellet/fuel recipe 
  • Use of additives/binder agents
  • Combustion experiments
  • Emission measurements
  • Ash and particulate matter analysis


  • Regionally transferable concept 
  • Biomass potential 
  • Biomass logistics


  • Implementation of gasification tests on a large scale


Project Search


Further networking

Project database