Title: Rapid cultivation of aerobic granular sludge for Simultaneous Nitrification and Denitrification in Sequencing Batch Airlift Reactor

Authors: Qi Yang, Guangming Zeng, Xiaoming Li, Dexiang Liao, Jianbo Cai, Jingjin Liu

Addresses: College of Environmental Science and Engineering, Hunan University, Changsha, China. ' College of Environmental Science and Engineering, Hunan University, Changsha, China. ' College of Environmental Science and Engineering, Hunan University, Changsha, China. ' College of Environmental Science and Engineering, Hunan University, Changsha, China. ' College of Resource and Environment, Huazhong Agricultural University, Wuhan, China. ' College of Environmental Science and Engineering, Hunan University, Changsha, China

Abstract: The cultivation of aerobic granular sludge in Sequencing Batch Airlift Reactor (SBAR) was investigated. The results showed that the aerobic granular sludge could be formed in short time (35 d) owing to better shear force and selective pressure in SBAR. Meanwhile, aerobic granulation was clearly accelerated when the external carbon source was intermittently added at one-cycle intervals. The mean diameter of the granules formed in this research was around 1.0 mm, MLSS 7 g/L, SVI 30. The analysis of nitrite-nitrogen and nitrate-nitrogen, in typical cycle clarified the Simultaneous Nitrification and Denitrification (SND) process in SBAR with the aerobic granular sludge.

Keywords: nitrification; denitrification; SBAR; sequencing batch airlift reactors; aerobic granular sludge; selective pressure; SND; simultaneous nitrification-denitrification; aerobic granulation; shear force.

DOI: 10.1504/IJEWM.2011.037365

International Journal of Environment and Waste Management, 2011 Vol.7 No.1/2, pp.49 - 57

Available online: 05 Dec 2010 *

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