A filter bag for a rotary disk filter, which is used to filter wastewater, has a filter material with a mounting opening, via which the filter bag can be slipped over a support frame of the rotary disk filter during a mounting step in order to form a filter module. The filter material has an exit opening that is situated opposite the mounting opening and allows filtrate to exit the interior of the filter module into a central pipe of the rotary disk filter. A reinforcement is connected to the filter material at an edge delimiting the mounting opening and fixes the filter bag at the support frame. A filter module and a rotary disk filter are disclosed.

A filter bag for a rotary disk filter, which is used to filter wastewater, has a filter material with a mounting opening, via which the filter bag can be slipped over a support frame of the rotary disk filter during a mounting step in order to form a filter module. The filter material has an exit opening that is situated opposite the mounting opening and allows filtrate to exit the interior of the filter module into a central pipe of the rotary disk filter. A reinforcement is connected to the filter material at an edge delimiting the mounting opening and fixes the filter bag at the support frame. A filter module and a rotary disk filter are disclosed.