Journal ArticleDOI
Treatment of dairy effluents in an aerobic granular sludge sequencing batch reactor
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TLDR
Aerobic granular sludge can successfully be cultivated in a sequencing batch reactor (SBR) treating dairy wastewater, and the maximum applicable loading rate is nevertheless limited, as the stability of aerobic granules very much depends on the presence of distinct feast and famine conditions.Abstract:
Aerobic granular sludge can successfully be cultivated in a sequencing batch reactor (SBR) treating dairy wastewater. Attention has to be paid to the fact that suspended solids are always present in the effluent of aerobic granular sludge reactors, making a post-treatment step necessary. Sufficient post-treatment can be achieved through a sedimentation process with a hydraulic retention time of 15–30 min. After complete granulation and the separation of biomass from the effluent, removal efficiencies of 90% CODtotal, 80% Ntotal and 67% Ptotal can be achieved at a volumetric exchange ratio of 50% and a cycle duration of 8 h. Effluent values stabilize at around 125 mg l−1 CODdissolved. The maximum applicable loading rate is nevertheless limited, as the stability of aerobic granules very much depends on the presence of distinct feast and famine conditions and the degradation of real wastewaters shows slower kinetics compared with synthetic wastewaters. As loading rate and volumetric exchange ratio are coupled in an SBR system, the potential of granular sludge for improving process efficiency is also limited.read more
Citations
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Journal ArticleDOI
Aerobic granular sludge: Recent advances
TL;DR: An up-to-date review on recent research development in aerobic biogranulation technology and applications in treating toxic industrial and municipal wastewaters and attempts to shed light on the fundamental understanding in aerobic granulation by newly employed confocal laser scanning microscopic techniques and microscopic observations of granules.
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Aerobic granular sludge technology: Mechanisms of granulation and biotechnological applications
TL;DR: The state of research on AGS formation mechanisms, bioremediation capabilities and biotechnological applications of AGS technology in domestic and industrial wastewater treatment is reviewed.
Journal ArticleDOI
Causes and control of filamentous growth in aerobic granular sludge sequencing batch reactors.
Yu Liu,Qi-Shan Liu +1 more
TL;DR: This review attempts to address the instability problem of aerobic granular sludge SBR from the perspective of filamentous growth in the system, including long retention times of solids, low substrate concentration in the liquid phase, and high substrate gradient within the granule.
Journal ArticleDOI
Advances in aerobic granule formation and granule stability in the course of storage and reactor operation
TL;DR: A review of the literature in aerobic granulation focusing on factors that influence granule formation, granule development and their stability in the context of sludge granulation attempts to shed light on the potential of developing granules with adequate structural stability for practical applications.
Journal ArticleDOI
Aerobic granular sludge: characterization, mechanism of granulation and application to wastewater treatment
TL;DR: Aerobic granular sludge has shown a potential for nitrogen removal, but is less competitive for the high strength organic wastewater treatments, and the future needs and limitations for aerobic granular technology are discussed.
References
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Journal ArticleDOI
The essential role of hydrodynamic shear force in the formation of biofilm and granular sludge
Yu Liu,Joo-Hwa Tay +1 more
TL;DR: It can be concluded that the knowledge regarding the effects of hydrodynamic shear force on biofilms and granules is far from complete and much research is still needed to fully understand the relevant mechanisms.
Journal ArticleDOI
Aerobic granulation in a sequencing batch reactor
J.J Beun,A Hendriks,M.C.M. van Loosdrecht,Eberhard Morgenroth,Peter A. Wilderer,J. J. Heijnen +5 more
TL;DR: It is shown that granule formation in aerobic reactors is feasible and can be exploited to increase the volumetric conversion capacity of such reactors.
Journal ArticleDOI
Aerobic granular sludge in a sequencing batch reactor
TL;DR: In this article, a laboratory scale sequencing batch reactor (SBR) granules were cultured under aerobic conditions, and granules taken from the reactor were stored for weeks without disintegrating.
Journal ArticleDOI
A review: the anaerobic treatment of sewage in uasb and egsb reactors
TL;DR: In this paper, the main characteristics of anaerobic sewage treatment are summarized, with special emphasis on the upflow anaerobically sludge blanket (UASB) reactor, with examples from Europe, Asia and the Americas.
Journal ArticleDOI
The effects of shear force on the formation, structure and metabolism of aerobic granules
Joo-Hwa Tay,Q.-S. Liu,Yu Liu +2 more
TL;DR: Experimental evidence is provided to show that shear force plays a crucial role in aerobic granulation and further influences the structure and metabolism of granules.