Grit Scraper is the preferred treatment unit to hold sand, gravel, etc. in the wastewater. Sand traps, sand, gravel, etc. it is the preferred treatment unit for keeping substances such as. Sand grains cause wear of pipes, pumps and similar mechanical parts. The grit scrapers developed by the Duhatech R & D team protect these materials and reduce the wear of the mechanical equipment, preventing the formation of precipitates in the pipelines and blocking of the pipelines. In sand traps, organic matter is not desired to collapse, it is intended to collapse inorganic substances only. Because the accumulation of biodegradable organic materials in sand traps creates odor problems during removal of sand. Grit scrapers are usually used after grilling before the pre-settling tank. Rectangular plan grit scrapers provide spiral rotation with the aerators placed in the tank in the wastewater kept at constant speed. Sand, gravel, etc. as the tank collapses to the bottom, substances such as oil – foam are collected on the surface. These wastes,which held in grit scrapers, are collected through the moving horizontal bridge road. While the collected oils are transferred to the foam collection unit, the collected items are sent to the sand separator through the submersible pump.
Travelling Bridge Scraper system is used in order to remove the solid substances from the tank which are deposited on the bottom of grit scrapers. With grit scrapers moving in two directions linearly along the sand trap, the sand is pushed to the bottom of the channel bottom, from which the air is taken from the tank by suction or submersible pumps. This sludge, which is mixed with water, is usually cleaned of organic substances contained in a sand washing or separation unit and collected in sand containers and transported out of the plant.
Sand, collected in the grit scraper has a large volume of water content. In order to reduce the volume of water, a more dry sand is obtained by the screw mechanism in the equipment. In this way, both the volume to be stored and the transportation costs to transport the sand are reduced.