1. Device (10) for treatment of a liquid (12) with a nonthermal atmospheric pressure plasma, wherein the device (10) comprises the following components:
– a high-voltage electrode (20);
– a liquid-permeable ground electrode device (30) comprising an areal, conductive region (32) and a porous region (34) arranged at the areal, conductive region (32);
– a discharge space (40) formed between the ground electrode device (30) and the high-voltage electrode (20);
– a first dielectric (50) which is arranged at the high-voltage electrode (20) such that a plasma can be generated in the discharge space (40) by means of a dielectric-barrier discharge;
– a flow volume (60) comprised by a wall (62) into which the liquid (12) can be fed;
wherein the wall (62) of the flow volume (60) comprises at least in a first region the ground electrode device (30), such that the flow volume (60) is connected liquid-permeably to the discharge space (40) via the ground electrode device (30);
wherein the device (10) is formed such that, in use, the liquid fed into the flow volume (60) passes through the ground electrode device and pours onto a surface of the ground electrode device (30) that faces the discharge space (40), so that a liquid film is formed on said surface;
characterized in that
the conductive region (32) of the ground electrode device is liquid-permeable along its areal expansion.