The screening systems Salher are designed to eliminate coarse and fine solids, in a manual, semi-automatic or automatic way.The compact pretreatment plant (PPC) is a compact dewatering and degreasing plant for the filtration or screening of solids, the elimination of fine solids with a size between 0.25-3 mm, the elimination of sands and dense solids and the elimination of oils and grease. It can incorporate a helical screw screen (PPC-TAHEL AND PPC-TAHEL-D) or a rotary drum sieve (PPC-TARO AND PPC-TARO-D).