Waste to Energy
SUSTAINABLE SUPPLY SOLUTIONS
French biogas plant relies on Bredel hose pumps for hot abrasive slurry handling O
ne of the largest biogas plants in France has recently been commissioned, with three Bredel 65 hose pumps
from Watson-Marlow Fluid Technology Group (WMFTG) at its core. T e pumps are being used to transfer homogenous abrasive slurry in three process stages vital for the sustainable supply of energy in the region. T e new biogas plant, which was designed, built and commissioned in 2017, is set to produce 2.2 million m³ of biomethane per annum, feeding the GRDF grid (Gaz Réseau Distribution France)
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and providing energy for 10% of the local population. Almost 50% of the digested organic waste mix processed at the new plant comprises manure from cattle and poultry farming. T e remainder is supplied by local fi sh canneries and slaughterhouses. By 2030 the European biogas
industry will produce as much ‘green gas’ (biomethane produced by upgrading of biogas and syngas) as ‘green electricity’. Approximately 18-20 billion m3
of
biomethane could be produced in Europe, this would correspond to about 3% of the natural gas consumption of the European Union. Biomethane production will achieve substantially diff erent levels in
each European country due to diff erent local conditions. Currently two countries (France and
UK) have introduced feed-in-tariff s for biomethane injection into the natural gas pipeline network at levels that make the production of biomethane economically comparable with the generation of ‘green’ electricity. In a pre-treatment step at this plant,
the diff erent waste streams are mixed into a homogeneous organic suspension, free of inert material, prior to digestion. T e specifi c process (mesophilic digestion) deployed at the plant means that waste has to stay in the digester for 50 days (instead of
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