Apparatus for sterilizing a liquid

An apparatus for sterilizing a liquid, comprising:

• a container having an inlet, an outlet and an interior with an outer wall which defines a first section and a second section, the first section being configured to receive the liquid when it is admitted through the inlet, and the second section forming a subregion of the interior above the first section;
• wherein the first section is separated from the second section by a separating wall in which slits or recesses for at least one disk or roller are provided, and wherein the separating wall comprises a reflective surface;
• a rotatable arrangement set up in the interior with a surface, the rotatable arrangement being configured in such a way that during a rotation the surface moves from the first section into the second section and from there back into the first section;
• wherein the surface comprises three-dimensional structuring which is formed in such a way that it can entrain a liquid film and/or small liquid portions with it when it is immersed into and emerges from the liquid admitted into the first section;
• at least one radiation source which is adapted to emit radiation in an ultraviolet wavelength range into the second section and onto the surface while the surface is located in the second section according to a rotational position of the arrangement.