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Energy recovery

In order to meet the European goal of producing 20% of the region's energy from renewable energy sources by 2020, Séché Environnement has pledged its full support and pursued this goal by recovering energy potential from waste.

Tailoring waste handling tools allows the energy released during the degradation of organic waste (storage facility) or during thermal treatment of waste to be recovered for electricity or steam production, helping to mitigate the greenhouse effect. Research into energy performance has also led the Group to develop dedicated solutions for mixed ordinary waste that cannot be recycled.

Producing Electrical Energy

 
Collecte sélective

At our incineration facilities (see also) :

  • At Trédi Salaise, Béarn Environnement and Sénerval, the thermal energy recovered during the treatment of emissions is used to fuel turbines generating electricity that can be fed back into the grid.

  • Solutions to produce methane from the fermentable fraction of waste are being developed at the Sénerval site to provide additional power generation.

At our waste storage facilities :

  • The degradation of waste in an anaerobic (without air) environment inside cells results in the natural fermentation of organic waste and the production of biogas, which contains a significant amount of methane, a gas with high energy potential.

  • This biogas is captured at all the Group's facilities so that it can be recovered by dedicated units (turbines or engines) :

The total energy produced by all the Group's sites combined allows Séché Environnement to generate more than 250,000 MWh per year, of which 70% is labeled "green electricity".

All the electricity produced is fed back into the ERDF grid.

Producing Thermal Energy

 
Combustibles de substitution

Séché Environnement's permanent goal is to optimize energy recovery from waste. Based on prevailing local conditions, the supply of energy takes first priority, reflecting the Group's commitment to promote industrial ecology.

Cogeneration (combined production of electricity and heat) is being developed at facilities that have sufficient energy resources as well as potential users in the immediate vicinity available.

  • At Rouen, Trédi Salaise, Sénerval: supply of steam to industries located in the immediate surroundings.

  • At the SEI facility in Changé : supply of energy to Codema, an agricultural forage-drying cooperative.

Production of Solid Recovered Fuels (SRF)

 
Production de Combustible de substitution

The production of SRFs provides a recovery solution suited to the properties of certain mixed waste (non-recoverable waste from selective collection, bulky waste from waste reception centers, etc.) that cannot be recovered in the form of material but that nonetheless holds energy potential.

Incoming waste is selected so that it will produce a stable LHV fuel, which will be then be used by duly licensed large energy consumers, ensuring total waste traceability and management under the best sanitary and environmental conditions.

The fuel is comprised of lightweight particles contained in waste with high energy potential (bits of paper, wood, plastic). It is produced and prepared on request (sorting, shredding and mechanical separation) based on the characteristics of the furnaces or boilers in the industry where the fuel will be used.