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.


C.E.R.E.S Germigny

Saint-Florentin (89)

Feedstock sources

29 500 tonnes per year


Intermediate energy crops / permanent grasslands

Manure / Biowaste


190 Nm³ CH⁴/h

Ceres Germigny was a struggling plant with subpar performance. It was taken over by TER’GREEN at the end of 2022. It is currently undergoing a regulatory compliance process, with production set to increase from 190 Nm³/h to 290 Nm³/h. The farmers who supply the plant with feedstock have indicated a renewed interest in the project as SYCOMORE teams finalise the work to allow the plant to operate at nominal speed in the second half of 2023.

Households supplied with gas
Gas-powered buses

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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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