Anaerobic digestion of energy crops without manure addition

For Germany, the number of biogas plants using energy crops in a manure-free-fiermentation is increasing. Simultaneously the number of process disturbances rose as well. In contrast, co-fermentation-plants in which liquid manure is used, indicate stability and higher load capacities. Current approaches at the University of Hohenheim should clarify on laboratory scale which elements of liquid manure are to be found responsible for its process stability. Further test series focus on a stable manure-free-fermentation using the industrial kind of substances found responsible for process stability of this specific fermentation.