Double disc pumps solve problems at treatment plant
Problem: In April 2010, the staff in Moline, Illinois, needed to replace a piston (plunger) pump at the North Slope Wastewater Treatment Facility. The pump, which fed a blend of wastewater and lime blowdown sludge at 8 to 10 percent solids to the belt filter press, needed to pull a small suction lift and operate against a discharge pressure of 10 to 20 psig because the press was across the plant.
Solution: After a trial run, the plant team installed 6-inch Penn Valley Pump Double Disc Pump Model 6DDSX76. The city later purchased a second
