| Abstrakt: |
An important consequence of animal farming is represented by the production of important quantities of manure or organic residues. Normally, these organic residues from animal husbandry are recovered, mainly as an important source of organic matter and mineral elements for agricultural soils, but for their adequate degradation is also possible to use anaerobic fermentative processes, thus obtaining biogas (bioenergy) and digestate which can be used as fertilizer. Anaerobic digestion is a biochemical process through which, organic complex substrates (plant biomass and waste, manure, organic waste, residual water, sludges from sewer systems, etc.) are decomposed, in the absence of oxygen up to the state of biogas and digestate, by various types of anaerobic bacteria. The gaseous mixture formed by CH4 (max. 80%) and CO2 (min 20%) together with small quantities of H2, H2S, mercaptans, water vapours and traces of NH3, N2, constitutes biogas. [ABSTRACT FROM AUTHOR] |
