gives an overview of the average TAN areal
removal rate and the cost per kg of fish produced per year for each biofilter type. Rotating biological contactors have the highest TAN areal removal rate,
followed by bead biofilters and trickling filters, and fluidized sand biofilters.Although rotating biological
contactors show good performance concerning TAN
removal rate, they are together with trickling filters more
expensive then the other biofilter types discussed.
Fluidized sand biofilters and bead biofilters are the
least expensive options for water treatment when the
cost per kg of fish produced per year is considered