Co-development of and co-investment in biomethane projects

Drawing on many years' experience, we help you develop your projects, from compliance with the relevant regulations right through to operation.


Designing and building

With more than 85 biomethane plants across France, we have all the relevant experience to assist you in building your own, be it a discontinuous dry or wet digester, to transform and recycle organic waste.


Operating and maintaining

Since 2014, we have helped optimize the performance of biomethane plants. To do this, we offer services that leverage all operational drivers requiring concurrent management.



As organic waste experts, we bring together waste producers and short-circuit plants to recycle waste and benefit the country as a whole.


What is anaerobic digestion in biomethane production?

Anaerobic digestion is a natural process used to recycle organic waste in an oxygen-free environment that enables microorganisms to break down the feedstock into biogas and digestate. This happens naturally in certain environments, such as marshes, but can also be artificially reproduced in special plants called ‘digesters’ with controlled conditions (low-pressure, oxygen-free environments kept at 38°C). Biogas can be used to produce biomethane fuel (bioCNG), electricity and heat, while digestate can be used as part of a fertiliser spreading plan.

Feedstock for biomethane production

Any organic waste can be used as feedstock for the production of biogas or biomethane:

Agricultural waste

Dry or liquid manure from pigs and cattle, agricultural residues, poultry manure, etc.

Community waste

Biowaste from the catering industry, grass clippings, chaff, roadside mowing, silage. etc.

Food industry waste

Animal or vegetable fat, fruit, vegetables, etc.

Household waste

Kitchen waste, wastewater, garden waste, etc.

The digester

Once the organic waste is in the digester – which recreates the optimal conditions for digestion (a low-pressure, oxygen-free, watertight environment with a constant temperature of 38°C) – and thanks to the microorganisms and bacteria that break it down, the organic waste ferments to create biogas or biomethane when purified and then is injected into the GRDF system (France’s main distributor of natural gas).

There are two types of digesters: liquid and discontinuous dry digesters.

Biogas recovery

Biogas recovery is a determining factor in the financial success of any given biomethane production project. There are currently several ways to recover biogas. The injection of biomethane into natural gas networks and cogeneration (generation of electricity) are the two most common recovery methods used in France and around the world. The decomposition of organic matter also produces a humus-rich, partially stabilized residue called digestate, which can then be reused for agricultural purposes as a natural and organic fertiliser.


The decomposition of organic matter also produces a humus-rich, partially stabilized residue called digestate, which can be used to fertilize farmland and support its natural performance. Unlike chemical fertilisers, digestate helps maintain the quality of the soil in the long term, rather than purely offering a short-term fix.

Biogas injection

Biogas produced by biomethane plants undergoes a purification process to remove impurities (water, hydrogen sulfide, carbon dioxide, etc.) so that only pure biomethane remains. This is then injected into the distribution network

Cogeneration of electricity

Biogas is compressed and injected into a cogeneration engine, which powers a generator to produce electricity, which is then injected into the Enedis electrical grid. The heat is recovered from the engine and exhaust gas cooling systems to power the biomethane production process and to –

The benefits of biomethane production

For farmers

New business opportunities
A stable form of additional income over 15 years
Agronomic improvement of outflows
Reinforcement of the land-farming relationship
Production of 100% natural fertiliser for spreading on fields

For local authorities

Creation of local waste processing industry
Increase in regional energy autonomy
Potential new business opportunities (installation of a local heat distribution system)
Fewer odour nuisances for locals and a reduction in greenhouse gas emissions.

For manufacturers

Capture of CH4 emissions
Local generation and sale of electricity, heat and biomethane
Reduction in need for waste transport.

Get in touch

Call us

Need help or have a question about your biomethane project? We're available from 8 am to 6 pm, Monday to Friday. Feel free to get in touch if you need our help.

+33 (0)1 57 21 34 70

Come and see us

Want to meet us in person? 
You can find us at 52 rue Paul Vaillant Couturier - 92240 Malakoff or at 3 Rue Galilée - 44 340 Bouguenais

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