Fine screen VTR

stepmechanical

VTR Step Screens are used for Fine Screening in both municipal and industrial waste water treatment plants. Description VTR Step Screens, designed for in-channel installation, are used for fine screening of waste water. They consist of two sets of lamellae - a mobile and a fixed one - which are separated by 3 or 6 mm spacing. The special arrangement of the lamellae forms filtering steps. Function Waste water is screened while the lamellae steps withhold the screenings. Throughout the operation the mobile lamellae lift the screenings step by step until they are dropped off on the fixed lamellae. The inorganic particles in the waste water flow are withheld by the screen forming a “screenings mat”. In this way, the water level upstream rises making the filter surface wider while the “screenings mat” on the screen keeps increasingly finer particles. As soon as the upstream water level reaches a set height, the screen starts its cycle rising up a step. During the cycle, the mobile lamellae lift screenings onto the next step until they reach the outlet for discharge.