High Efficiency

Waste-to-Energy Solutions

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Divisional Profile

Royal Dahlman started it’s renewable technology portfolio in 2001, upon a request from ECN to cooperate in the development of the OLGA tar removal technology. This development resulted in successful lab and pilot tests and the realization of a commercial demonstration plant in France. In 2006 Royal Dahlman signed a license agreement which officially gives Royal Dahlman a worldwide exclusive license for the OLGA technology. In 2011 a company was started fully dedicated to the Renewable portfolio;  Dahlman Renewable Technology B.V. (DRT).

DRT aims for a leading position in advanced gasification and syngas purification.

Since 2001, Royal Dahlman has built up a leading position when it comes to the knowledge and supply of technology solutions for power plants based on gasification of biomass and/or waste. An important part of this is the OLGA technology, which removes entrained tars from the gas generated by gasification (“syngas”), upgrading the gas to a quality suitable as fuel for reciprocating engines or gas turbines.


Royal Dahlman Visitors at Tondela Renewable Energy facility2


Synova LLC, also known as Synova Power, is a developer of waste and biomass gasification projects, with a special focus on integrated gasification combined cycle (“IGCC”) plants (please watch the concept in a movie[M1] at the website of Synova's project finance affiliate Full Cycle Energy Fund. They have adapted the most efficient solid fuel technology for power generation, the IGCC (so called “clean coal” technology), to fuels that are cost-effective but do not add greenhouse gas. Synova is headquartered in Los Angeles with operations in the Netherlands and active projects focused in Southeast Asia, Europe, and the USA.

For more information: http://synovapower.com/


Synova - Royal Dahlman cooperation

Synova and Royal Dahlman have a strategic cooperation aimed at the worldwide development of waste-to-energy power plants. Synova LLC has, in cooperation with her Dutch subsidiary, acquired a minority stake in Royal Dahlman as part of this cooperation. 

This cooperation enables Synova to include the innovative technology and expertise of Royal Dahlman in its projects. Royal Dahlman and Synova have developed a standard design for “waste to energy power plants” that is available in three sizes, and these form the basis for cost reduction and faster cycle times for a large number of projects that are planned in North America, Europe and Asia.



The Energy research Centre of The Netherlands - ECN - is the leading institute for energy research in The Netherlands. As an independent organization with more than 600 staff, ECN carries out basic and applied research in the fields of renewable energy sources, fossil fuels and environmental aspects of energy supply, policy studies, and the development and application of new materials.

OLGA and MILENA technology are patented ECN inventions which were further developed by a successful cooperation between ECN & Royal Dahlman, which started in 2001. Royal Dahlman has the licenses for the MILENA and OLGA technology.

For more information: http://www.ecn.nl/units/bkm/ 


ECN - Royal Dahlman cooperation

Royal Dahlman was asked to cooperate with ECN in the development of OLGA gas cleaning (tar removal) technology from the start in 2001. Important milestones were the realisation of the 500 kWth OLGA in 2003, the order for integration of the OLGA technology in the 'green' power station in Moissannes France (4 MWth, 1 MWe) in 2005 and the prove of OLGA technology with a duration test in 2006. 

This co-operation between a knowledge institute and an innovative commercial company proved to be very fruitful. The partnership was sealed on 22 November 2006 by signing the license agreement. This officially gives Dahlman a worldwide license to build the OLGA technology, per 18 July 2006.

After the successful introduction of the OLGA technology, ECN started to develop a next generation gasifier (MILENA) for the route to bioSNG and other catalytic upgrading processes. A nitrogen free gas is very important for the catalytic upgrading of the product gas. A higher efficiency can be obtained by going to 100% fuel conversion, which is not possible with a direct fluidised bed gasifier. With indirect gasification, where char is burned separately and heat is transported to the gasification zone, the 100% fuel conversion becomes possible. 

As there was already a successful cooperation between ECN - Royal Dahlman for the OLGA technology, ECN requested Royal Dahlman in 2010 to support with the further developments of the MILENA technology and to launch the MILENA to the market. In 2013 the official license agreement was signed.


ECN & Royal Dahlman Capabilities 

The activities of Royal Dahlman and ECN are complementary to each other. Royal Dahlman and ECN therefore form an excellent team, which can assist you in every aspect of your project. ECN’s specialty is research & development. Dahlman’s specialty is developing, designing & delivering equipment to fit optimally into your process. ECN has the lab & pilot scale facilities, Royal Dahlman has engineering, project management and production facilities. Below we summarise our possibilities for your gasification project.

  • Chemical research (understanding your process & learning more together with you)
  • Lab scale tests (we have a small BFB gasifier and OLGA with a capacity of 1-2 Nm³/hr)
  • Pilot scale tests (we have a CFB gasifier and OLGA with a capacity of 200 Nm³/hr)
  • Process engineering packages; a process design specifically optimised for your project
  • Basic design and mechanical engineering according to your specifications
  • Detailed engineering according to your standards and requirements
  • Production, turnkey delivery and full project management
  • Commissioning & start-up on site
  • Service & after sales


For more information about Royal Dahlman, please view this website or contact us.