The shortage of fossil fuels and the impact of their emissions on the environment and human health have led to search for alternative fuel sources able to replace fossil fuels in terms of energy capacity, but also with a lowest environmental impact. In other words, our society is facing the challenge of finding new sustainable fuels, and biomass and waste are among those materials called to substitute fossil fuels. Combination of Biomass and MSW for the production of an evironmentally friendly RDF at a reasonable price. However, POP such as dioxins could be formed during the combustion process and particulary during the gas cooling of the gases evolved. For this reason, it is necesary to perform a study in depth on combustion and post combustion in order to avoid the formation of undesirable combustion products, as well as how the fuel composition influences the POP formation. ; Presentación realizada para 24th International Karasek Toxic Organic Pollutants (TOP) Conference, Umeå, 2015