The water to be treated is injected into the tank by a vertical centrifugal pump through the central inlet (1) and flows through the filtering active mud layer (2) where starts the separation of the mud particles. The flow rises inside the lamellar pack (3). Inside the channels of the pack the speed of the rising water is constant and therefore the mud flakes, because has a higher density than the water, settles (5) in the bottom of the channel and then slides in counter current flow in the bottom of the clarifier (9). The mud is extracted by an horizontal centrifugal pump (10), homogenized (11) and pumped to the filterpress (12). Meanwhile the clarified water overflows down into the collecting channels (7) and comes out from the clarifier through the exit flange (8).
Back Flow is a special automatic function of Tesimag lamellar treatment plant that allows to keep activated the filtering layer: the mud is extracted and pumped back into the clarifier. This function also has the advantage of avoiding the clogging of the discharge pipes and the compacting of the mud. The dimensions on Sirion plants, compared with the traditional sedimentation tanks, are lower by 90%. This means that a surface of a square meter on the ground is in proportion to 10 meters of a traditional sedimentation tank. This plants can be equipped with a big bag filtering system or a filterpress for mud dehydration.