NOYAL-CHATILLON, FRANCE: INNOVATIVE BIOGAS PLANT

This biogas plant at a cattle farm in Noyal-Chatillon near Rennes, France is characterized by its innovative features that enhance energy and maintenance efficiency, resulting in maximum performance. HoSt acted as one-stop supplier for this turnkey biogas project.

In the first phase, the biogas plant will produce 140 Nm³ biogas per hour (75 Nm³ biomethane per hour) from a maximum of 8,500 tonnes of cattle manure and maize silage per year. Future plans are to extend the installation to 200 Nm³ biogas per hour (110 Nm³ biomethane per hour).

Double insulated double membrane roofs

At this project at cattle farm ‘Castelmetha’ the digestion tanks are equipped with double insulated double membrane roofs. Due to the special design of the insulated roofs maximal heat retention and minimal odor spread is ensured. Together with an advanced heat recovery system and extra tank insulation this results in maximum energy efficiency. An external heat exchange system is used, instead of an internal heat system, to enhance maintenance efficiency.

Double incorporation screw

For optimal feedstock particle size, the solid feeder fuel system is equipped with a double incorporation screw. In addition, the integrated HoSt Ruminator System recirculates feedstock from the digester, grinds the feedstock and feeds it back into the digester. This process prevents floating layers formation of biomass and creates the most ideal anaerobic digestion process for an optimal biogas production.