Table 1.

Axial gradient along the nitrifying fluidized bed reactor

SampleDistance from inlet (cm)[O2] (μM)pH[NH4+] (μM)[NO2] (μM)Aggregate diam (mm)
Inlet02368.0720
A1102127.95032.0–2.5
A2301427.74071.5–2.0
A350877.5040.8–1.3
Outlet80597.300