Greenfish recently worked with Xylowatt, a Belgian spinoff from the UCL (Université Catholique de Louvain), developing and operating Biomass to Energy plants.
How? The NOTAR® is an innovative technology developed by Xylowatt since 2001. The NOTAR® technology is the sole industrial reactor that produces clean syngas from natural or recycled wood chips without tar emissions.

Easily combinable with a cogeneration engine, wood gas becomes a renewable source of energy to produce both electricity and heat in a circular model.

Goal and mission

Xylowatt operates a pilot plant on the site of the university hospital of Namur (CHU Mont-Godinne) in Wallonia. The plant processes woodchips into a wood gas and converts the gas into electricity and warm water to supply the hospital. Technical expertise and project coordination from a Greenfish consultant have notably enabled to get this pilot project operational.

More recently, a feasibility study was performed by a second Greenfisher to construct a gasification plant in Japan. Combining a technical and market approach was needed to provide a complete feasibility study.
Inside the Engineering team, Greenfish also supported Xylowatt in the improvement of the gasification process: the start-up and final filtration were two steps of the process to be improved.

Finally, Greenfish supported the commercial team to draft technical and monitoring reports for the LIFE+ subsidy granted to Xylowatt for the development of the NOTAR® technology.

Approach and methodolgy

To adapt their Belgian technology to the client’s requests, the following approach was followed:

  • Detailed technical description of the NOTAR® technology
  • Description of specific modifications of the plant because of local regulations and specifications
  • Evaluation of import regulation and necessary certifications for specific equipment
  • Financial evaluation of the transport, CAPEX and OPEX costs of the plant

All the information regarding the feasibility study led to a final report & presentation shared to the client.


The feasibility study report summarizes the technical and financial aspects for the construction of a new plant in Japan, including:

  • A summary of the technical improvements of the NOTAR® technology.
  • An overview of the CAPEX and OPEX costs of the project. An extended analysis was also performed to create an overview of the costs of equipment, transport and certification for import to Japan.
  • Various projections & scenarios of the construction phase of the plant in Japan

Besides the technical & financial validations for the Japanese project, additional reporting work have been pursued regarding the NOTAR® technology development, supported by a LIFE+ grant. Technical and monitoring reports have been drafted and ready on time for review by the European Commission.

Do you want to know more about this project? Do you need help with the drafting of feasibility studies, subsidy proposals or EU funding reports? Feel free to contact us at