Anaerobic digestion plants: yield calculation, analysis and how to improve the process and their products use

Biogas, as renewable energy form, can properly substitute conventional sources of energy (fossil fuels, oil, etc.) which are causing ecological–environmental problems as fast increasing of CO 2 emissions.
This paper analyse different type of anaerobic processes, which difference depend of the alimentation to anaerobic digester. Several anaerobic plants were analysed with different reactors, different feedstock, agricultural by-products, slaughterhouse wastes conveniently used. For each plant has been analysed yield, biomass used, biogas composition, nitrogen balance and a final comparison of different technologies involved in the processes.