Using carbon substrate as a selection pressure to enhance the potential of aerobic granular sludge microbial communities for removing contaminants of emerging concern

The setting time was regarded as the selection pressure to make the particles which were unable to get acclimatized to that cultivation circumstance so as to get the aerobic granular sludge which own excellent setting ability with screening and beneficiation. The internal-circulate sequencing batch airlift reactor (SBAR) process was adopted in this experiment to investigate the effect of setting time to the formation of aerobic granular sludge in SBAR under low organic loading. The results showed that aerobic granular sludge with an average particle diameter of 4.0 mm had a good settling ability with spherical or ellipsoidal, smooth and dense on surface, furthermore, the removal rates of NH3-N,TP and CODCr were 96%, 94% and 90% ,respectively. The setting time can be treated as the dominant element for the control of formation and characteristics of aerobic granular sludge to a certain degree in its forming process.

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Effect of calcium addition to aerobic granular sludge systems under high (conventional SBR) and low (simultaneous fill/draw SBR) selection pressure

Environmental Research ◽

10.1016/j.envres.2020.110639 ◽

2021 ◽

Vol 194 ◽

pp. 110639

Author(s):

Antônio Ricardo Mendes Barros ◽

Clara de Amorim de Carvalho ◽

Paulo Igor Milen Firmino ◽

André Bezerra dos Santos

Keyword(s):

Selection Pressure ◽

Granular Sludge ◽

Aerobic Granular Sludge ◽

Calcium Addition

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Startup and stable operation of advanced continuous flow reactor and the changes of microbial communities in aerobic granular sludge

Chemosphere ◽

10.1016/j.chemosphere.2019.125434 ◽

2020 ◽

Vol 243 ◽

pp. 125434 ◽

Cited By ~ 4

Author(s):

Shuai Li ◽

Dong Li ◽

Yingqiao Wang ◽

Huiping Zeng ◽

Yixing Yuan ◽

...

Keyword(s):

Microbial Communities ◽

Continuous Flow ◽

Flow Reactor ◽

Granular Sludge ◽

Aerobic Granular Sludge ◽

Stable Operation ◽

Continuous Flow Reactor

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Research on Aerobic Granular Sludge Cultivated under Selective Pressure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1004-1005.908 ◽

2014 ◽

Vol 1004-1005 ◽

pp. 908-913

Author(s):

Qing Zhao ◽

Qi Xia Liu ◽

Xin Zou

Keyword(s):

Selective Pressure ◽

Batch Reactor ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Granular Sludge ◽

Aerobic Granular Sludge ◽

Uasb Reactor ◽

Municipal Sewage ◽

Carbon Substrate ◽

Aerobic Sludge

Inoculated with aerobic sludge from the UASB reactor of a pharmaceutical plant and excess sludge of a municipal sewage treatment plant, granulation of aerobic sludge was realized in a sequencing batch reactor fed with glucose as carbon substrate. Selective pressure created by means of increasing organic loading and decreasing sedimentation time enhances the formation of aerobic granular sludge. Granules started to appear after 35 days operation. The granules were composed of filamentous species with varying degrees of rod-and coccal-type bacteria. While COD and NH4+-N of influent retaining 1600mg/l and 160mg/l, COD and NH4+-N of effluent respectively were 40mg/l and 1mg/l. The removal rates were higher than 95% and 99%.

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