The raw waste feed-in flow considered in our study was in the range of 100÷150 kg/h corresponding to a small
scale unit. The main differences of the raw waste compared to biomass are: higher humidity and inert fraction; lower
oxygen content. These characteristics reduce the gasification unit capacity. Using original computation software that
utilizes the chemical reactions at equilibrium the waste gasification process was numerically modeled. As the
solution provided contains all the waste to energy conversion stages, the model conceived as an integrated
conversion chain. To optimize the global energy efficiency the sensitive heat of the syngas produced by the
gasification unit is used for process air preheating and waste partial drying within a contact heat and mass
exchanger.