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High autotrophic nitrogen removal rates of 858mg NL -1 day -1 or 1.55g Nm -2 day -1 were obtained in a lab-scale rotating biological contactor treating an ammonium rich influent. It was postulated that ammonium was removed as dinitrogen gas by a sequence of aerobic ammonium oxidation to nitrite taking place in the outer biofilm layer and anaerobic...
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