... conditions, and the other was exposed to anoxic conditions (use of nitrogen gas and addition of 20 mg-N/L NaNO3 to the cup). The PUR was estimated from the slope of the line describing the linear ... study, both the oxic and anoxic PURs were lower than those in other systems, indicating the low activity of PAOs in the process. In the University of Cape Town (UCT) processes, the PURs were slightly ... (ii) the low retention time of wastewater in the sewer line (lower composition of fatty acids), and (iii) low nitrogen loading to the anoxic tank. In this study, the nitrate concentration in the...