Effect of sinusoidal perturbations of feed concentration on multi-substrate carbon oxidation and nitrification process in an upflow packed-bed nitrification process in an upflow packed-bed

The performance of an upflow packed bed biofilm reactor has been analyzed under multi-substrat leimitation by considering simultaneous carbon oxidation and nitrification reactions For an inlet concentration of 200m g 1^-1 of NH+(4)-N and 5 0 mg 1^-1 of methanol the results show that organic substrate is consumed very rapidly near the inlet of the reactor while most of the NH+(4)-N is converted in the central region of the reactor.When the inlet concentration of methanol wastep input response when the inlet NIL+(4)=N concentration is subjected to sinusoidal variation. The concentration profiles within the biofilm reactor show that oxygen is a limiting component at the middle of the reactor when both methanol and NH+(4) –N inlet concentrations follow sinusoidal variation