Abstract: Processes and facilities for the production of biological synthesis gases and/or a synthetic propellant, in particular DME (dimethyl ether), and/or biological silica using biogenic input materials and comprising the following steps: Allothermal gasification of the biogenic input material by means of impulse burners for the integrated generation of process heat in a fluidized bed gasifier Gasification of inert pyrolytic coke from the first gasification step in a second gasification step preferably operated in parallel according to the principle of the expanded or circulating fluidized bed using oxygen/steam as gasification agents Combination of at least part of the gasification products from the two gasifiers for common processing