Cascade type settling ponds with water directing barriers

Source of the photo: 
Gruiz Katalin
Author of the description: 
Gruiz Katalin
Red mud

The alkaline slurry leaving the red mud pond gets settled through a multistage, cascade type settling system resulting the separation of the suspended solids.  The settling ponds are provided with permeable barriers that filter the red mud. The filtered, clear water is not yet neutralised at this stage, its pH still exceeds 12. This alkaline water is channelled  in ditches around the red mud storage pond and before discharge into the Torna creek it is neutralised.