The influence of aeration rate on partial nitrification in sequencing batch reactor
by Weiwei Wu, Li Cong, Jianlong Wang
International Journal of Environment and Pollution (IJEP), Vol. 38, No. 1/2, 2009

Abstract: Partial nitrification was investigated in Sequencing Batch Reactor (SBR) under aeration of 100, 500, 1000 and 1600 ml min⁻¹. The biomass concentration was about 1.7 g l⁻¹. When the ratio of alkalinity (mg l⁻¹) to NH₄ ⁺ -N (mg l⁻¹) was 7.14 : 1, pH and DO would both increase dramatically after ammonia oxidation finished. Through monitoring and controlling the variation of pH and DO in the reactor, a stable partial nitrification process could be maintained. During NH₄⁺-N oxidation the fluctuation range of DO was 0.09∼3.70 mg l⁻¹. The NH₄⁺-N removal efficiency and NO₄⁻-N accumulation rate were higher than 97.9% and 99.1%, respectively.

Online publication date: Mon, 22-Jun-2009

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