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Biofilm Innovations Crown U.S. Trickling Filter Revival
Author: Denny S. Parker, Mike P. Lutz, Alan M. Pratt
Date: 6/105
Reprinted from Water Quality International, No. 3, 1989

After falling in disfavor in the USA in the 1970s, trickling filters are now enjoying a revival, reappearing in new applications. The trickling filter/solids contact (TF/SC) process uses physical and biological flocculation features to transform the poor quality of the trickling filter effluent into something comparable to the best activated sludge system.

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