The preliminary project "NETZ" develops strategies and concepts for tapping the sustainable, energetic potential of substrates of agricultural origin, in particular farmyard manure in Switzerland. The basic idea is based on a separate and efficient fermentation of solid and liquid substrates and includes a separation of the full slurry. While the thin slurry is digested on the farm in a small low-tech plant, solids are processed in a regional, larger digestion plant. This reduces energy losses and emissions. The biogas produced on the farm is used to cover the farm's own re-quirements for heat, electricity and/or fuel, and the regionally produced energy source is fed into energy networks.