Grit Washers for Wastewater

Conical grit washers separate and wash sand from wastewater of various nature: municipal and industrial of different types. It consists of a large conical hopper for sand settling, sedimentation and washing, and a screw for conveying and dehydration of collected material. The conical shape of the hopper, the special counter-washing system and the low rotational internal stirrer allow the machinery to wash the sands and separate the organic matter. The machine is completely enclosed by sealing and cover in order to avoid the odors and contaminant matter out coming. On the upper part of the hopper there is a flanged inlet introducing the material to be treated in the machine. The conical shape of the hopper and the movement system through the low rotational stirrer make a twirl enabling the sand washing and settling. The heavier sand particles settled on the bottom of the hopper where a counter-current system allows the washing; therefore the washed material reaches the coupling linking to the screw. On the side of the hopper there is a proper outlet allowing the out coming of the lightest material. The shaftless screw on the bottom of the machine is able to extract the collected material, dehydrating it and uplifting it towards the outlet in order to convey it in a container. Sismat Uluslararası Conical Grit Washers are mainly made up of conical decantation hopper, stirrer, shaftless screw, trough, stirrer drive unit, screw drive unit and discharge chute.