Characteristics of Nitrogen Removal in Aerobic Granular Sludge Reactor at Low Temperature

Rui Ling Bao; Lian Qing Xue; Xiao Ju Yan; Shui Li Yu

doi:10.4028/www.scientific.net/AMM.295-298.1438

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 295-298Characteristics of Nitrogen Removal in Aerobic...

Characteristics of Nitrogen Removal in Aerobic Granular Sludge Reactor at Low Temperature

Abstract:

An aerobic granular sludge sequencing batch reactor was carried out at low temperature (101oC) to understand the characteristics of nitrogen removal. The results indicated that nitrification via nitrite could be achieved with an average nitrosation rate of 97.7%. Influent C/N ratio was an important factor influencing the accumulation of nitrite in the effluent. In the experinment, the reactor exhibited a higher removal efficiency for COD with the effluent concentration of COD ranged from 88.2% to 91.8%. In phase I which C/N ratio was 20:1, effluent concentration of ammonium was about 12.9mg/L with the removal efficiency of 77.0%. As the C/N ratio was reduced to 15:1 and 10:1, the effluent concentration of ammonium was around 0.5 mg/L. At the same time, nitrite in the effluent reached up to 21.0 mg/L when the influent COD concentration was induced from 1120mg/L to 560 mg/L with C/N ratio induced from 20:1 to 10:1, however nitrate concentration was remained around 0.4 mg/L throughout the whole experinment.

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Periodical:

Applied Mechanics and Materials (Volumes 295-298)

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1438-1441

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https://doi.org/10.4028/www.scientific.net/AMM.295-298.1438

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Online since:

February 2013

Authors:

Rui Ling Bao, Lian Qing Xue, Xiao Ju Yan, Shui Li Yu

Keywords:

Aerobic Granular Sludge, Low-Temperature, Nitrification, Nitrogen Removal

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