The gasification process, first demonstrated at the Güssing power plant, is based on the steam gasification of biomass in the internally circulating fluidized bed. The heart of the plant - the fluidized bed - steam gasifier - consists of two interconnected fluidized bed systems. In the gasification unit the dried biomass is being gasified at approximately 850°C under injection of steam (instead of air) as gasification which creates a nitrogen-free, low-tar producer gas with high calorific value. Before its further application it is cooled and cleaned. The flue gas produced in the oxidation zone is cooled down, dust is removed and finally it is purged by the stack. The heat is used to operate an ORC module in order to improve the electrical efficiency.