Energy self-sufficient farm house in Finland http://www.eep-ca.org/forums/documents/foro%20I/biogas_lampinen.pdf

Case 2: Energy self-sufficient farm house in Finland (Kalmarifarm in Laukaa, near Jyväskylä)gCo-fermentation of dung from 40 cows, acriculturalresidues and food industry waste in a 150 m3reactorgSelf-sufficiency of electricity, heat and traffic fuelgEnergy income: sells electricity to the grid, will sell traffic fuels in the future (after removal of Finnish tax barriers), possibility of selling heat and gasgFermentation residue excellent (food quality) fertilizer