Figure 7: Ammonium degradation and fructose consumption by the attached PNN consortium during 96 h incubation in the liquid medium with 7.5 g/L (NH4)2SO4. (A) Concentration of fructose and ammonium over time (pretreatment of beads with molasses). (B) The effect of pretreatment type of ceramic beads on the fructose consumption. Beads treatment was performed as indicated in Materials and Methods.