I. INTRODUCTION
New energy sources will have as main feature almost zero
CO2 balance [1]. Among them, the ways of bioenergy from
waste are particularly interesting. The use of renewable
energy, such as biogas, has become a necessity and an integral
part of the current strategy to mobilize all available resources.
The anaerobic digestion is a series of operations biological
degradation of organic matter by microbial flora that occur in
the absence of oxygen. The products of degradation can be
classified into two categories: biogas and digestate. Biogas is
a mixture of methane (CH4), carbon dioxide (CO2) and water
vapor (H2O). Methane is the main component of natural gas.
Digestate is the liquid residue containing non-degraded
materials