Abstract
A mathematical model simulating the nitrification process in a tublar wastewater treatment contactor was presented. According to the model, the operation of nitrification are quantitatively analyzed.
When the reaction rate is not affected by the liquid phase mass transfer resistance in honeycomb tube, a specific relation between the effluent BOD and NH4-N concentrations. Which is similar to that obtained for the activated sludge and rotating biological contactor process, can be obtained. When the reaction rate is controlled by the liquid phase mass transfer resistance, on the other hand, little higher effluent NH4-N concentration than that in the former case at low BOD concentration is obtained.
Methods to predict the NH4-N removal under various operating conditions of the contactor for two cases : the oxygen-supply-controlling and the oxygen-transfer-controlling, were also presented. The results of the illustrative calculations were compared with the observed data and discussed.
