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Upgrading Trickling Filter Effluents with the TF/SC Process
Author: Denny S. Parker, Kenneth V. Brischke, Raymond N. Matasci
Date: 4/292
Presented at the IWEM 92 Conference "Europe and North America--How Far Apart?" April 28-30, 1992

World-wide, there are many trickling filter plants that have given excellent service for decades, yet are in danger of abandonment in favor of newer technologies. Except in a few instances, trickling filter plants have produced only a semi-polished effluent and have not obtained the low TSS and BOD levels possible with the activated sludge process and other newer attached growth systems. However, since 1979, a process modification known as the TF/SC process (Trickling Filter/Solids Contact process) has allowed the production of effluents from existing trickling filters that have equaled those of any other secondary treatment process. In fact, the TF/SC process has shown itself to be capable of producing monthly average BOD and TSS of 10 mg/l and 10 mg/l respectively. These results have been obtained with both the newer plastic media, as well as with plants that incorporate older rock trickling filters.