TSK is developing desulphuration purifiers of Lada, Velilla, La Robla and Narcea.
Treatment plants of La Robla and Narcea are designed for discharge water, in a way that the treated water is sent back to the desulphuration cycle. These plants have at their disposal previous physical -chemical treatment focused on removing calcium and magnesium ions.
Velilla plant consists of a physical- chemical treatment focused on removing heavy metals and suspended solids, followed by a denitrification biological treatment with a following decantation.
The Lada treatment plant consists of a physical-chemical treatment focused basically on sulphates removal under their solubility limit for which there is applied a combined treatment of lime and sodic aluminate.