For three different applied
filter medium types in commercial farms and a range of
hydraulic surface loading conditions, the highest observed
TAN areal removal rate for a trickling filter was
1.1 g TAN/m2 day, with an average TAN areal removal
rate of about 0.16 g TAN/m2 day (Schnel et al., 2002;
Eding et al., 2006). Lyssenko and Wheaton (2006) reported
TAN areal removal rates of 0.64 g TAN/m2 day.
In the same study they found similar TAN areal removal
rates for a submerged expandable upflow sand filter.