Green gas is reprocessed biogas, which is a product of the fermentation of waste and manure or the result of gasification of biomass. When reprocessing this gas, it will get the same qualities as natural gas, and can be supplied to customers via the existing transmission network.
The major advantage of green gas is that it is renewable, making it a sustainable alternative to natural gas. It also has a positive effect on the total gas stock. GasTerra has been buying green gas and supplying it to its customers since 2012. For now, because of the limited supply, it only comprises a small part of the total portfolio.
In addition to the trade in green gas, GasTerra supports the development and sharing of knowledge and expertise, for example through partnering up with the Stichting Groen Gas Nederland, which aims to set up an independent centre of expertise for the production, reprocessing and sale of biogas. GasTerra also develops and supports research programs, at e.g. the EnTranCe testing lab, to develop innovative ways to produce green gas.
At the moment, two projects supported by GasTerra are underway, researching whether the incorporation of hydrogen in a digester methane can increase the yield of the fermentation process. With both knowledge and financial support, GasTerra actively supports the development and introduction of new energy technologies. The emphasis is on decentralised energy production, because this offers the best perspectives for efficient energy use.
The first research project looks at the various technologies available to reduce CO2 to methane in a biological reaction with hydrogen, the non-biological alternatives and the technical and economic aspects of the various options. The second project researches whether admixing in an existing technology, namely high-pressure gasification, can result in a significantly higher utilisation of the available biomass, and a higher gas yield as a result.