EnviTec Biogas AG

Unpacking and cleaning of waste materials in Ribeauvillé (France) - Case Study

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Courtesy of EnviTec Biogas AG

Location: Ribeauvillé (France)
Capacity: 1,4 MWel
Input materials: Cattle slurry, renewable resources, waste materials from the food industry
Features: Separate hygienisation plant with a capacity of 25,000 t/a.

The biogas plant AGRIVALOR ENERGIE

The project was initiated by 3 farmers from Alsace: René Van der Meijden, Philippe Meinrad and Noël Adam. It took place under the aegis of the Agrivalor Energie society.

The idea of constructing a methanization plant arose as a natural step in 2007, since the production of biogas was then incorporated into the long-term activities of the Agrivalor society, which specializes in the agronomic usage of organic matter (use of composting facilities and commercialization of organic fertilizers), the treatment of organic waste, and fuel wood (sale of chippings and pellets for boilers). The farmers looked after the project right from the formulation of the permission application dossier. They decided to assign EnviTec Biogas in 2009, since the proposed offer best met the expectations of the contracting party. As well as treating agricultural effluent – namely dung and liquid manure – the plant needed to be able to treat agricultural by-products, organic waste from the agricultural food sector, and bio-waste.

The plant comprises the following facilities and systems:

  • One storage facility for solids
  • Three reception tanks for liquids
  • One 80 m3 vertical mixer for the reception of heterogeneous input materials
  • One hygienization unit for animal by-products with cooling
  • One deconditioning unit for organic waste
  • One 750 m2 building
  • Two 4,000 m3 digesters
  • Two recirculation units
  • One digestate storage tank with 5200 m3 capacity, second digestate storage tank with 7000 m3
  • One 1,415 kWel cogeneration plant
  • Biogas treatment by active carbon filter
  • Catalyst for CHP exhaust

The production of electricity began in January 2012. All produced electricity is sold back to EDF. The renewable heat is used to heat the inside of the digester and to keep its internal temperature at 37°C, to heat storage tanks for greasy products, to supply the hygienization unit and to provide a spa and leisure centre with hot water. Moreover, the heat is used to supply a cheese fabric and to dry fodder.

The input materials come from various sectors:

  • Agriculture: livestock manure, cheese-making effluents, viticultural by-products and collected secondary crops
  • Communities: catering bio-waste
  • Companies: supermarket wastes
  • Agricultural food sector: greasy waste from food processing industries

The plant is extremely flexible and offers significant opportunities for utilizing organic matter. Therefore AGRIVALOR has become a reference in France as a typical « Waste to Energy » plant, which is regularly exposed in French media.

Unpacking and cleaning of waste materials in Ribeauvillé (France) - Case Study

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