The present invention describes a PEF system (I) comprising a (channel 2) for PEF treatment of a material, opposite electrode units (3), (4) and at least one conveyor belt (5), wherein said at least one conveyor belt (5) is arranged in the channel (2), in between the opposite electrode units (3), (4) and in close proximity to one of these electrode units (3), (4), wherein said at least one conveyor belt (5) is perforated and/or comprises one or more PEF permeable sections, preferably is perforated, more preferably is a net.