Anaerobic Digestion Process
The anaerobic digestion process
Anaerobic digestion consists in the organic substance by methanogenic and hydrogenotrophic bacteria degradation in conditions of anaerobiosis in the absence of free oxygen.
Biomasses are composed of organic materials that can be degraded anaerobically to allow the biogas production (methane and carbon dioxide).
How does the anaerobic process work?
The anaerobic decomposition process is structured in three phases:
- Hydrolysis: the action of hydrolytic and fermentative bacteria transforms present in organic materials carbohydrates, proteins and lipids into simpler substances such as fatty acids, monosaccharides, amino acids and alcohols;
- Acidogenesis: in this phase of the process the substances produced in hydrolysis is transformed, by acid-forming bacteria, into volatile fatty acids with the anhydride carbonic, ammonia and hydrogen sulphide production;
- Acetogenesis: these molecules are digested producing hydrogen, carbon dioxide and acetic acid.
These substances are then transformed into biogas from which can be obtained electricity, heat, through cogeneration, and/or biomethane by means of Upgrading plants.
Thanks to the special technologies and applied plant engineering choices, the anaerobic digestion’s natural biological process maximizes both energy recovery and the solid residues of the process stabilization.
Biowaste, thanks to its technology, provides the best tailormade configuration for every project.
Our anaerobic digesters are designed to obtain optimal mixing conditions and a constant temperature during all the process.
The anaerobic digestion’s sdvantages, in summary, are: