Characteristics of municipal wastewater treatment by moving-bed biofilm reactor
by Xiang Hu, Yanfang Shi, Jianlong Wang
International Journal of Environment and Pollution (IJEP), Vol. 37, No. 2/3, 2009

Abstract: In this paper, the bio-activity of activated sludge was investigated using Oxygen Uptake Rate (OUR) as an indicator. The activity of ammonium oxidation and COD removal of both attached- and suspended-growth sludge was determined under different temperature and organic loading rates. The experimental results indicated that at 5°C, the nitrification activity was about 60% of that at 18°C. The nitrification activity of attached sludge was 20-30% lower in comparison with suspended sludge. The denitrification rate of sludge in zones I and II was 0.44 mg NO₃⁻/g MLSS•h and 0.63 mg NO₃⁻/g MLSS•h, respectively, which revealed that the denitrification activity of sludge-II was higher compared with sludge-I, the results also indicated that the accumulation of nitrite was very low.

Online publication date: Wed, 13-May-2009

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