• Processing capacity: 700 Nm³/h raw biogas
• Input: Renewable raw material (energy crops)
• Feed-in capacity: 350 Nm³/h biomethane
• Start-up date: 2010

In the small town Unsleben (at the edge of the Bavarian Rhön Mountains) the existing biogas plant, fed with renewable raw materials, was extended in 2010 by constructing four new digestion tanks. With the biogas a CHP is operated and electricity is generated (889 kWel.). The low-temperature heat of the gas engine is decoupled and supplies a neighbouring gardening business as well as the local heating network of Unsleben.

The biogas additionally gained through the plant extension is refined to biomethane in a biogas upgrading plant and is fed into the natural gas grid of Bavarian Rhöngas. In combination with the CHP operation of the biogas plant, the energy consumption of the upgrading process can be covered largely by using the exhaust heat of the engine.

Generation of electricity and natural gas production at one location in combination with an almost complete use of exhaust heat of the combustion process of the gas engine enables the optimum efficiency of the inserted biomass.