Ter'Green

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.

Ter'Green
Naskeo

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.

Naskeo
Sycomore

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.

Sycomore
Teikei

Supply

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

Teikei

Welcome to TEIKEI

A new subsidiary of the KEON group, TEIKEI is a local expert in organic waste, bringing together waste producers and short-circuit biomethane plants. Recycling that puts people first

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

With more than 80 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.

Since 2014, we have helped optimize the performance of biomethane plants. To do this, we offer services tailored to all your needs, from maintenance and operational support to biomonitoring, automation and more.

A tale of transformation


As we advance through the 21st century, we are more aware than ever of the impact of human activity on the environment. Change is happening: our mindsets and our societies are evolving. That’s how we know that the world is ready to embrace the transformation of waste products into energy. And that’s why we dedicate each day to supporting biomethane projects in France and further afield.


Anaerobic digestion, a process for transforming organic matter into biogas used as energy and into digestate to fertilize the soil. It is at the confluence of several environmental issues, because it is the first lever for greening the fossil gas currently circulating in the networks, but also because it is a key tool in the agro-ecological transition.

Change is happening: our mindsets and our societies are evolving.


We know that the world is ready to embrace the transformation of waste products into energy.

“Nothing is lost, nothing is created, everything is transformed”
Antoine Lavoisier

Shared values

Close relations

Building a tight-knit community of partners and customers, responding to all of their requirements and questions. Committing to creating a better world, a cleaner planet and a more ethical society. Innovating, researching, transforming. Here are just a few of the values that we hope to bring to our work and share.

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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Let's talk about your project