K. Peychev*, R. Georgiev Department of Agricultural Engineering, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria Abstract. A theoretical analysis of the impact of maize silage (in milky wax maturity) added as a co-ferment in slurry biomass for biogas production

The objective of this paper is to establish the minimum thickness of heat insulation for an experimental bioreactor, developed at the Institute of Microbiology of the Bulgarian Academy of Sciences, required to ensure heating of the fermentor with its own produced biogas. The experimen