Marnay Energie
The Marnay anaerobic digestion unit is located in the Cher department. The Marnay domain is an agricultural rural area in the Sancerre region. The project originated from the desire of a visionary and environmentally conscious farmer.
Project description
Matthieu Breusse took over the 450 hectare family grain farm of Moulin de Marnay in 2006 and felt anaerobic digestion was the most appropriate solution, as it enabled him to limit the mineral fertilisation of his crops, reduce his greenhouse gas emissions, his energy bill, and reinforce the independence of his territory. This is how, backed by the expertise of Evergaz and its design office, the cogeneration anaerobic digestion unit was created in 2014, with a treatment capacity of more than 36,000 tonnes of waste per year. It recovers agricultural manure, Sancerre distillation sludge and other local agricultural and agri-food waste within a 30 km radius. The biogas generated is subsequently sent to a cogeneration engine which recovers it into electricity, fed into the network. The heat recovered by cogeneration is partly used to feed the anaerobic digestion unit, in particular to keep the digester at the right temperature.
Key data
-
Agricultural manure, Sancerre distillation sludge
-
Treatment capacity :
36,500 tonnes per year -
Biogas recovery by cogeneration :
1.07 MWel -
Heat recovery :
Process -
Avoids the emission of :
3,500 tonnes of CO2/year, i.e. the equivalent of 2,244 cars -
Equivalent number of homes supplied with electricity :
2,000 homes -
Investment :
€7.9 million -
Land application plan over :
1,500 ha and 9 farmers involved in the land application plan -
Commissioning :
2014
Benefits
- Treatment of local waste
- Production of organic fertilisers substitutable for chemical fertilisers
- Reduced pollution of sensitive wetland areas (upstream of the River Loire)
- Reduction in the energy bill
- Reduction in the territory’s energy dependency
- Creation of local jobs
Marnay Energie is Evergaz’ founding site. Commissioned in 2014, it highlights the complementarity of the agricultural and industrial sectors in producing biogas and recovering digestate in this cereal and wine-growing Sancerre region.
Frédéric Flipo Représentant du Président de Marnay Energie
Project partners
