Page 7 - Simplified Wastewater Treatment Fundementals_Trickling Filters.exe

Trickling Filters

Trickling Filter Media

Rock media was the first type of media used. It provided surface area and lasted a

long time. However, rock is heavy and limits how high the rock media can be stacked.

Limited stack height results in limited hydraulic retention time and limited treatment.

Rocks offer only a small surface area for zoogloeal mass to grow on. As a result, rock

media is not the most efficient type of Tricking Filter media.

Plastic media is far more efficient. It is lighter, can be stacked higher (providing

longer hydraulic retention). Plastic media offers far more surface area per square foot

for the zoogloeal mass to grow on, through its honeycomb structure.