Roanoke, Virginia Regional Water Pollution Control Plant treats 37 million gallons of wastewater a day. From 2015 to 2016 they had a major upgrade and expansion to their facility. New screw pumps were added for peak wet weather flow pumping when the Roanoke wastewater treatment capacity is exceeded.
The screw pumps elevate the un-treated wastewater to a flow equalization tank for off-line storage. The stored un-treated wastewater is later returned to the wastewater plant for treatment after the peak flow subside. The 114-inch screw pumps are some of the largest in the U.S.
Screw Pumps provide a cost-effective and reliable method of pumping large quantities of water at low total dynamic head (TDH).