Scrapers clean solids from intake systemProblem: Backwash strainers at a wastewater treatment plant in Toronto, Ontario, Canada, were consistently clogging with oversized solids that made it past the intake bar screens. Downstream pumping equipment experienced high failure rates, and subsequent treatment stages were overwhelmed.Solution: The plant installed two 16-inch Automatic Scraper Strainers from Acme Engineering Products, rated for 6,000 gpm each. The scrapers use aggressive brushes that clean out the slots of the wedge-wire screen. They operate automatically, using line pressure to intermittently purge accumulated solids. Maintenance is infrequent and requires simple replacement of the scraper blade and brush.Result: The
