Cultivation of Aerobic Granular Sludge under Selective Pressure in a Sequencing Batch Reactor

Kui Zu Su; Chang Wang; Hui Fang

doi:10.4028/www.scientific.net/AMR.255-260.3037

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 255-260Cultivation of Aerobic Granular Sludge under...

Cultivation of Aerobic Granular Sludge under Selective Pressure in a Sequencing Batch Reactor

Abstract:

Aerobic granules were cultivated in the sequencing batch reactor at 15-25°C, pH 7.0 ± 0.1. Settling time decreased from 5 minutes to 1 minute gradually. As increasing the chemical oxygen demand (COD) and NH₃-N in influent, COD removal efficiency and mixed liquid suspended solids of the reactor increased. Sludge volume index decreased continuously for a few days and then stabilized at 22 ml g^-1. Selective pressure induced by settling velocity was proved to play a crucial role in activated sludge granulation. Based on the continuously measured data, the granulation process was divided into three phases, granules namely initiating, developing and maturating.

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Periodical:

Advanced Materials Research (Volumes 255-260)

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3037-3041

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https://doi.org/10.4028/www.scientific.net/AMR.255-260.3037

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May 2011

Authors:

Kui Zu Su, Chang Wang, Hui Fang

Keywords:

Aerobic Granular Sludge, Selective Pressure, Sequencing Batch Reactor (SBR)

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