Tereos process all of its agricultural raw materials, using the residues to transform into green energies, such as bioethanol and bagasse. To create a sustainable industrial model, Tereos puts the circular economy at the heart of its actions and reduces the consumption of energy needed for processing the raw materials.

Key figures


of the electricity consumed on Reunion island comes from bagasse


of the distilleries’ energy needs in Artenay and Dobrovice stem from methanisation


inhabitants: in Brazil, Tereos supplies the public grid with the equivalent of the annual power consumption of a city of this size


A renewable product, bioethanol is manufactured from cereals and sugar beet in Europe, and from sugar cane in Brazil. Bioethanol shares an identical chemical formula with alcohol, but has a different manufacturing process and areas of use. It is the only liquid fuel currently available as a partial substitute for petrol. Bioethanol emits 60% less greenhouse gases than petrol and generates twice as much energy as that needed to produce it.

  • Connantre ED95 041218 © Michel Blossier pour Tereos (5 sur 109)_opt


A fibrous residue resulting from the crushing of sugar cane, bagasse is also a rich source of energy. When burned in a boiler, it provides steam and electricity (a cogeneration process). The energy generated from bagasse considerably exceeds the needs of the production plant, which means it is possible to sell electricity to the power grid. During the campaign in Reunion Island, Tereos supplies bagasse to the island’s two largest thermal power plants, which are situated close to its facilities. This prevents 145,000 tonnes of coal from being imported.



In 2014, new methanisation units were commissioned at our site in Dobrovice, Czech Republic. The new process is based on the use of vinasse, a distillery by-product, and is a world first. The biogas that is produced is then used for the plant’s boilers, reducing both the consumption of fossil energies and CO2 emissions.