*2.7. Environmental Suitability of the Proposed Process: Emissions Reduction by Using Generated Biogas as an Energy Source Rather Than a Conventional Fossil Fuel*

The objective of this section is to estimate the reduction in emissions that would occur if it is decided to use the biogas generated in the proposed solution as an energy source, rather than obtaining such energy by conventional means in the combustion of a fossil fuel. To this end, the "Methodology for thermal energy projects aimed at reducing the consumption of fossil fuels in a new or existing facility" [34], developed by the Carbon Fund for a Sustainable Economy (FES-CO2) of the Spanish Ministry of Environment, has been followed.

The methodology is based on calculating the emission reductions associated with the project as the difference between emissions from a base scenario (final energy is obtained through the burning of natural gas) and project emissions (the final energy is obtained by burning the generated methane).

## **3. Results and Discussion**
