Device for the plasma-supported treatment of liquids

A device (10) for treating a liquid (12) with a nonthermal atmospheric pressure plasma, wherein the device (10) has the following components:

• a high-voltage electrode (20);
• a liquid-permeable ground electrode device (30) that has a flat, conductive region (32) and a porous region (34) arranged on the flat, conductive region (32), wherein the conductive region (32) is liquid-permeable along its flat extension;
• a discharge space (40) formed between the ground electrode device (30) and the high-voltage electrode (20);
• a first dielectric (50) that is arranged on the high-voltage electrode (20) so that a plasma can be generated in the discharge space (40) by means of a dielectric barrier discharge;
• an initial flow volume (60) surrounded by a wall (62) into which the liquid (12) can be introduced;
• characterized in that
• at least in a first region, the wall (62) of the initial flow volume (60) comprises the ground electrode device (30) such that the initial flow volume (60) is connected to the discharge space (40) in a liquid permeable manner via the ground electrode device (30) and wherein the liquid introduced into the initial flow volume (60) passes through the ground electrode device (30) and flows over a surface of the ground electrode device (30) that faces the discharge space (40).