|
a - Biomethanisation
The organic fraction part that is not destined to the composting or aerobic stabilization area reaches this area to be treated anaerobically, that is, in absence of oxygen.
After a first separation of improper material waste in dry, the organic matter undergoes an advanced wet pretreatment that allows the clean organic suspension to reach the 2 digestors in optimal conditions for the generation of biogas thanks to the complex biological activity of the anaerobic microorganisms.
The biogas generated is sent to 2 combustion engines that produce electricity, nearly 13 million kWh/year, and heat that is used to heat the digestors and for the hygienisation of the digest –suspension coming out from the digestors–.
The production of electricity makes it possible to prevent the emission of more than 5,000 tons CO2/year to the atmosphere, which is equivalent to planting around 250,000 trees, or a forest covering the same surface as the town of Canet de Mar (625 Ha).
 |  | | Digestor | Wet pretreatment |
|
|  |
|
