**2. Methodology**

A generally accepted and suitable indicator to describe the environmental impact of solid waste management systems is the GWP [21]. Even though there are many other assessment categories (respiratory inorganics, terrestrial ecotoxicity, carcinogens), the impact on global warming is the most relevant for assessment is this area [7]. GWP represents the amount of GHG produced or saved in kg(CO2)eq, and the calculated environmental impact can be both positive or negative. In this paper, an inventory related to subsequent GWP evaluation is performed during the calculations of the WtE case. In the case of other treatment methods—composting and fermentation—an LCA inventory was used for evaluation and follow-up trade-off.
