The Farmgen anaerobic bio digestor at Dryholme Farm near Silloth Cumbria, UK. - stock photo

The Farmgen anaerobic bio digestor at Dryholme Farm near Silloth Cumbria, UK. The plant which cost £4.5 million, produces 1.2 Mw of electricity, enough to power 2000 households. It uses around 25,000 tons of feedstock annualy, mainly maize and grass, which is mixed with farm slurry and fed into the massive digestors where bacteria break it down. The resulting methane is what powers the electricity generator. The waste product can be spread on the land as a fertilizer, and there are also plans to dry it and sell as biomass boiler fuel.