ScourGuard™ filter backwash troughs allow granular media filters to be cleaned by simultaneous application of air scour and water backwash, with minimal media loss in the backwash waste. Concurrent application of air scour and backwash waster is an aggressive media cleaning technique that allows tenacious, deeply embedded contaminants to be removed quickly and efficiently. The technique offers real operating economies through reductions in backwash frequency, backwash water production, and lower energy consumption of air blowers and backwash pumps; however, media loss is a concern. When backwash water is allowed to overflow the trough weirs during air scour, air induced turbulence can cause media particles to be carried into the waste trough and lost. The ScourGuard™ trough essentially eliminates media loss through the use of the patented trough baffle design

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