A system for conveying a sterilization medium comprises at least two buffer containers for sterilization medium which are arranged so as to be connected in parallel, at least one fluid flow controller, to which each of the buffer containers is fluidically coupled, and a pressure media supply device, which couples a pressure medium source to the buffer containers and is adapted to act upon the buffer containers with a pressure medium. The system is configured such that for each buffer container a fill mode and a spray mode can be set. In the fill mode the correspondingly switched buffer container is adapted to be filled with the sterilization medium from a supply device, and in the spray mode the correspondingly switched buffer container is fluidically coupled to the fluid flow controller and the sterilization medium can be conveyed from this buffer container toward the fluid flow controller based on a pressure applied by the pressure medium. The buffer containers are adapted to be switched alternately.