News & Events

Decreased Filter Run Volume Investigation Leads to an Unlikely Culprit

By Erin K. Moore, PE – Tighe & Bond, Inc.

After a New York plant converted to biofiltration, staff initially thought hot summer temperatures, new procedures, and other factors were decreasing filter run volumes. But when the plant couldn’t reach design-rated capacity, an evaluation revealed a deposit obstructing the filter effluent valve.

Discover how this problem was solved – read the full article here.

Originally published in American Water Works Association’s Opflow.

PWTF staff ultimately discovered scale deposits blocked most of the filter effluent valve, severely restricting flow and increasing head loss through the system. Photo originally published by AWWA.