Biogas in France has been progressing steadily year-on-year in line with the evolving regulatory framework, an adaptive and increasing offer (including the arrival of new homegrown technological and service solutions) and a growing sensibility and interest to utilise the still under-exploited bioresources suitable for anaerobic digestion.
Click on the Bioénergie International "Biogas Atlas 2017".
Biogas is a combustible gas composed primarily (60%) of methane (CH4), and carbon dioxide (CO2) derived from the breakdown of organic matter in the absence of oxygen. This process is called anaerobic digestion.
Biogas can be produced using digesters or be directly captured in landfill sites. All organic matter can be converted into biogas with varying concentrations of methane gas. Liquid manure, agricultural waste and energy crops can be fed into biogas plants in farms or in collective units that treat different types of waste associated with a significant proportion of manure.
Sewage effluents can be digested in sewage treatment plants. Green and municipal solid wastes can also be converted into biogas in solid waste digester units.
Anaerobic digestion allows farmers, specifically dairy farmers, to substitute their chemical fertilizers with the nutritional by product of anaerobic digestion, thereby in parallel contributing to resolving the problem of storage and waste treatment.
Biogas can be used for:
Anaerobic digestion enjoys a substantial economical and industrial potential in France, especially in the agricultural sector, thanks a large substrate market, and a still modest number of units in comparison of the potential.
There are many different kinds of anaerobic digestion projects, because of the range of wastes, which can feed the anaerobic digestion process. Agricultural biogas units can be split in two categories:
- centralised territorial projects, bringing together several actors, mixing animal manure with wastes from industries and local authorities.
- projects led by farmers, utilising mainly animal waste, supplemented with external waste, crops residues and energy crops.
Earl 2016, there were 236 agricultural biogas units, and 31 territorial projects running. The current rate of new projets is around 70 per year.
But biogas isn't restricted to the agricultural sector, and at the end of 2014, we counted as well: 113 biogas units in landfills, 10 in domestic waste facilities, 87 in Wastewater Treatment Plants (WWTPs) and 80 in water treatment units for industries or agro-industries. The Wastewater treatment sector in particular is promising: about 100 WWTPs are already equipped with digesters, and several innovative projects are ongoing, but half the potential (about 1TWh/year) remains to be developed...
source: ADEME 2016, RISPO 2016
At the end of march 2017, 506 biogas units were connected to the electric grid, for a total capacity of 399MW. 187 projects were pending, for a cumulative capacity of 87MW.
The biomethane injection capacity is currently around 410 GWh/year, produced by 26 units. The objective of the sector being 3500 GWh/year in 2018, 8000 GWh/year in 2023 (and 2000 GWh/year for BioCNG, ie. 20% of CNG consumption) and 10% of all methane consumed on the grid by 2030.
The cumulated pending projects amount to 5000 GWh.
source: Ministry of Environment 2017
In order to foster the development of the sector, the government has progressively implemented the following support mechanisms:
More information on biomethane on the official website:www.injectionbiomethane.fr
The Pays de la Loire and Brittany regions are the first French regions for animal rearing (they account for half of the French cattle and pigs), with a strong presence of agro-industries (one third of the French agro-industrial sector in terms of employees and turnover). Therefore, they have naturally a strong potential for anaerobic digestion. Available substrates represent about 50 million tonnes of animal manure, close to 2 million tonnes of agro-industrial waste and 2 million tonnes for waste from local authorities.
sources: SINOE, AGRESTE 2016
In order to oversee the development of anaerobic digestion in these two regions, a programme was created in 2007: the "Plan Biogaz", financed by ADEME and both regions, and animated by AILE association. For more information, click here.
Brittany and Pays de la Loire are the most dynamic regions in terms of biogas projects. More than 120 agricultural and territorial units are currently in operation in the area.
source: AILE 2016