When Older is Better

The Pittsburg (Kan.) Wastewater Treatment Plant uses trickling filters and ingenuity to ward off wet-weather flows and stay in permit compliance

In the old days, coal mining sustained the economy of Pittsburg, Kan.

Today, the abandoned mines contribute to serious infiltration and inflow that can push volume at the city’s 3 mgd wastewater treatment plant to 14 mgd and beyond. Rainwater floods the old pits and mine shafts,...

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