On the 29th of June 2012 Susanna Nilsson presented her Doctoral Thesis entitled: Modeling and simulation of a three-stage gasification technology for waste and biomass. The thesis is related to the Gasification of Biomass and Waste in Fluidized Bed and was carried out within the FletGas project. The members of the evaluation committee were: Pedro Ollero de Castro and Constantino Fernández Pereira from the University of Seville, Magín Lapuerta Amigo from the University of Castilla-La Mancha, Bo Leckner from Chalmers University of Technology and Wiebren de Jong from Delft University of Technology. The thesis was approved with cum laude distinction.