Patent ID: 8430112

Claim:
A system for treating wastewater comprising a source of a treating slurry; a pump disposed to deliver at least a portion of the treating slurry to the wastewater; a source of a flushing fluid; and a controller configured to energize the pump in a treating mode that delivers the at least a portion of the treating slurry to the wastewater and actuates a first valve, located downstream from the source of the treating slurry and upstream of the pump, in an open position; a second valve, located downstream of the pump, in an open position; and a third valve, located downstream from the source of the flushing fluid, in a closed position, when in the treating mode, the controller further configured to energize the pump in a reverse flushing mode that introduces the flushing fluid to a conduit that connects the source of the treating slurry to the wastewater and actuates the first valve and the third valve in an open position, and to actuate the second valve in a closed position, when in the reverse flushing mode, and further configured to energize the pump in a forward flushing mode that introduces the flushing fluid to the conduit.