Influence of starvation time on formation and stability of aerobic granules in sequencing batch reactors

Liu, Yong-Qiang; Tay, Joo‐Hwa

doi:10.1016/j.biortech.2007.03.011

Cited by 119 publications

(41 citation statements)

References 19 publications

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“…The idle phase of 35e40 min applied on the bioreactor configuration during granulation also indicates that longer starvation time is required to form AGS P with high biomass concentration in the SBR P. This is in agreement with the studies by Liu and Tay (2008) and Li et al (2006). With the high biomass concentration over the aerobic granule sludge (AGS), it is supposed that the phototrophic facultative anaerobic bacteria have comfortably resided in the inner part of granules (de-Kreuk, 2006).…”

Section: Biomass Concentrationsupporting

confidence: 56%

Characteristics of developed granules containing phototrophic aerobic bacteria for minimizing carbon dioxide emission

Salmiati

Dahalan

Najib

et al. 2015

International Biodeterioration & Biodegradation

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Section: Biomass Concentrationsupporting

confidence: 56%

Characteristics of developed granules containing phototrophic aerobic bacteria for minimizing carbon dioxide emission

Salmiati

Dahalan

Najib

et al. 2015

International Biodeterioration & Biodegradation

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“…In addition, the lower biomass production of AGS np compared to the AGS p could be due to conversion of substrate to CO 2 and H 2 O during respiration, in which higher CO 2 production in AGS np culture elucidates the lower biomass yield of aerobic granules as suggested by Liu and Tay (2008).…”

Section: Biomass Concentrationsmentioning

confidence: 86%

A proposed aerobic granules size development scheme for aerobic granulation process

Dahalan

Abdullah

Yuzir

et al. 2015

Bioresource Technology

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Aerobic granulation is increasingly used in wastewater treatment due to its unique physical properties and microbial functionalities. Granule size defines the physical properties of granules based on biomass accumulation. This study aims to determine the profile of size development under two physicochemical conditions. Two identical bioreactors namely Rnp and Rp were operated under non-phototrophic and phototrophic conditions, respectively. An illustrative scheme was developed to comprehend the mechanism of size development that delineates the granular size throughout the granulation. Observations on granules' size variation have shown that activated sludge revolutionised into the form of aerobic granules through the increase of biomass concentration in bioreactors which also determined the changes of granule size. Both reactors demonstrated that size transformed in a similar trend when tested with and without illumination. Thus, different types of aerobic granules may increase in size in the same way as recommended in the aerobic granule size development scheme.

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“…Since Morgenroth et al (1997) found the aerobic sludge granulation in a sequence bioreactor, researchers have conducted numerous studies on the formation and characteristics of aerobic granule, affecting factors of sludge granulation, mass transfer and model simulation, extracellular polymeric substances (EPS), and formation mechanism (Beun et al 2002;Liu et al 2006;Wan et al 2009;de Kreuk et al 2010;Ni and Yu 2010;Gao et al 2011, Uan et al 2013. However, the aerobic granular sludge system is still not stable, and the application of this technology is faced with big bottlenecks and challenges (Winkler et al 2011;Chen et al 2007;Adav et al 2008;Liu and Tay 2008).…”

Section: Introductionmentioning

confidence: 99%

Microbial community analysis for aerobic granular sludge reactor treating high-level 4-chloroaniline wastewater

Zhu

Dai

et al. 2013

Int. J. Environ. Sci. Technol.

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A laboratory-scale sequencing airlift bioreactor continuously treating high-level 4-chloroaniline (4-ClA) wastewater was used for studying the effect of 4-ClA on the characteristics and microbial community of aerobic granular sludge. The granulation of aerobic sludge and efficient pollutant removal performance were developed via shortening sludge settling time and gradually increasing influent 4-ClA concentration to around 400 mg L -1 . However, the granular sludge reactor deteriorated with the 4-ClA loading rate above 0.8 kg m -3 d -1 . Denaturing gradient gel electrophoresis and real-time quantitative PCR were applied to investigate the microbial community succession during the start-up and recovery of bioreactor. The results showed that the performance of granular reactor was significantly influenced by the microbial community of aerobic granule, and stable aerobic granule was dominated with b-Proteobacteria (61.28 %), Flavobacteriales, Planctomycetales, Clostridiales, and Acidobacteria. Since Thauera (21.55 %) related to the genus b-Proteobacteria was abundant in the stable 4-ClA-degrading granular sludge, it was speculated as the main 4-ClA-degrading bacteria. Under high chloroaniline level, the sludge granulation may maintain the stability of the bioreactor via adjusting the composition of microbial community and abundance of functional microorganism. This paper provided useful information for better understanding the change of microbial community characteristics under highlevel toxic organic pollutants and process optimizing.

show abstract

Influence of starvation time on formation and stability of aerobic granules in sequencing batch reactors

Cited by 119 publications

References 19 publications

Characteristics of developed granules containing phototrophic aerobic bacteria for minimizing carbon dioxide emission

Characteristics of developed granules containing phototrophic aerobic bacteria for minimizing carbon dioxide emission

A proposed aerobic granules size development scheme for aerobic granulation process

Microbial community analysis for aerobic granular sludge reactor treating high-level 4-chloroaniline wastewater

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