Scrapers main aim is to remove the settled sand, grit and suspended solids deposited at the bottom of settling tanks. They operate along a surface with an attached
bridge sweeping across the bottom of the tank and also could be operated along with a skimmer fort he scum at the top layer of the wastewater. Scraper moves linearly
along the length with guide wheels situated on the concrete walls. These scrapers can be manufactured from
Aluminum, Epoxy coated or galvanized steel or stainless steel.