Biogas comes from the biological breakdown or fermentation of organic matter such as household waste, sludge from treatment plants, and effluent from agriculture and the food-processing industry in an oxygen-free environment.

This organic matter can be turned into a source of energy through direct combustion and cogeneration or can be fed into the district gas system once it has been treated. Such solutions not only tap the energy potential of waste but also process the organic matter and return it to the soil through anaerobic digestion.

Learning about biogas

Biogas comes from organic matter such as agricultural waste, industrial by-products and urban refuse. It provides a green energy source that contributes to the circular economy.

Biogas: a solution vital to the energy transition

Biogas is essential to the energy transition because of its ability to significantly curb greenhouse gas emissions and provide a stable, linear source of energy that is extremely efficient. It also provides decentralised power generation solutions that make it a key part of the drive to develop a circular economy.

Find out more in Energies Mag - September 2016: biogas, green energy that supports the circular economy.

Biogas can cater to a whole range of needs, providing solutions for agriculture, local authorities and industry.

Energy transition targets

Biogas targets set under the French energy transition introduced in 16 April 2016:

  • Heat recovery: 300k metric tons of oil equivalent by the end of 2018 and 700-900k by the end of 2023
  • Installed electrical capacity: 137 MW by the end of 2018 and 237-300 MW by the end of 2023
  • Biomethane fed into the gas network: 1.7 TWh in 2018 and 8 TWh in 2023


Revenue from the biogas industry is expected to more than double by 2020


Biogas provides four types of energy source: heat, electricity, gas and fuel

Dalkia biogaz : a Dalkia subsidiary specialising in biogas

Our subsidiary Dalkia biogaz specialises in biogas, turning organic waste into green energy through three key business lines: filtration, recovery and anaerobic digestion. 

The company is a gas specialist able to handle all types of biogas to boost reliability and enhance the performance of recovery facilities.

In addition to its role as a developer, Dalkia biogaz also invests in managing its own production sites and supporting third-party projects, which involve local authorities and other regional stakeholders, as well as manufacturers, farmers' co-ops and agricultural associations.

By offering its partners a full range of solutions and services, including support in developing, designing, funding, building and operating biogas and anaerobic digestion facilities, Dalkia biogaz has established a position that spans the entire value chain.

Our subsidiary's french website

Tour(s)plus is reducing its environmental footprint by turning the sludge from its treatment plant into a resource.