Production of biogas from biscuit waste

The paper presents the results of the model of anaerobic co-fermentation of cattle slurry with the biscuit waste.  It was confirmed that the waste from the food industry is a valuable biogas substrate. The highest specific production of methane (0.493 m N 3 kg VS -1 ) was achieved in the co-fermentation of 20 wt% biscuit waste with cattle slurry. The feed mixture contained 22 wt% total solids. Biscuit waste has specific production of biogas 0.66 m N 3 kg -1 and specific production of methan 0.38  m N 3 kg -1 .