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Principle of the Methanization
The anaerobic transformation or
digestion of the organic material is due to numerous type of bacteria’s and
micro-organisms. This transformation take place in a tank
called a Reactor or
Digesters.
Two principal groups of bacteria’s
are used in this digestion:
- Acetogens
- Methanogens
Acetogens are responsible for the
transformation of organic material into volatile fatty acids; mainly acetic.
Methanogens are in charge of the gas
production. This gas is composed of Methane CH4 and Carbon dioxide CO2, in
the proportion of 65% of CH4 and 35% of CO2.
Methanization produces, in average, three times less
CO2 than a natural aerobic process such as manure spread directly on
agricultural fields.
The combustion of the gas generates
steam and a very small quantity of CO2.
The methanization process is
eligible to the “Carbon Program”: Protocol of Kyoto. |
