The Operation Characteristics of Advanced Sewage Treatment Process Using Aerobic Granular Sludge in Pilot Plant

In order to accelerate the cultivation of micro-aerobic granular sludge for domestic sewage treatment, an expanded granular sludge bed (EGSB) reactor seeded with excess sludge was employed. It was found that micro-aerobic granules can form and grew compact within one month, and remained stable during the later operation, the mature cultivation had average particle size of 0.81mm, and 64% of the granules had settling velocity above 35m•h-1. Moreover, excellent COD and nitrogen removal were obtained. For hydraulic retention time (HRT) of 5h, as the recirculation ratio and oxygenation rate were set at 6.5 and 0.25g•L-1d-1respectively, COD removal ranged in 80%-91%, leaving effluent COD below 50mg•L-1. The removal efficiency of ammonium and total nitrogen (TN) were 72%-89% and 76%-87%, respectively with effluent concentration down to 3-12mg•L-1and 5-14mg•L-1. Results showed that the efficiency of simultaneous nitrogen removal was much influenced by effluent recirculation and oxygenation rate in micro-aerobic EGSB reactor.

Download Full-text

Contaminants removal characteristics between floc sludge and aerobic granular sludge in domestic sewage treatment at low temperature

2011 International Symposium on Water Resource and Environmental Protection ◽

10.1109/iswrep.2011.5893270 ◽

2011 ◽

Cited By ~ 1

Author(s):

Shi Wenxin ◽

Wang Shuo ◽

Yi Xuesong ◽

Yu Shuili ◽

Jiang Lihui ◽

...

Keyword(s):

Low Temperature ◽

Sewage Treatment ◽

Granular Sludge ◽

Domestic Sewage ◽

Aerobic Granular Sludge ◽

Contaminants Removal

Download Full-text

Reactor performance and membrane fouling of a novel submerged aerobic granular sludge membrane bioreactor during long-term operation

Journal of Water Reuse and Desalination ◽

10.2166/wrd.2017.019 ◽

2017 ◽

Vol 9 (1) ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Jianfeng Li ◽

Yanjun Liu ◽

Xiaoning Li ◽

Fangqin Cheng

Keyword(s):

Membrane Fouling ◽

Membrane Bioreactor ◽

Sewage Treatment ◽

Granular Sludge ◽

Synthetic Wastewater ◽

Aerobic Granular Sludge ◽

Municipal Sewage ◽

Reactor Performance ◽

Term Operation

Abstract The aerobic granular sludge membrane bioreactor (AGS-MBR) has the potential for simultaneous carbon/nitrogen removal and membrane fouling mitigation. Most studies have focused on comparison of granular sludge MBR and flocculent sludge MBR in short-term tests using synthetic wastewater. In this study, two identical AGS-MBRs were developed, and the reactor performance and membrane fouling were examined systemically over 120 days for synthetic wastewater and municipal sewage treatment, respectively. Results showed that regular granules with good settling ability were developed and maintained throughout the experimental period. Regardless of the substrate type, AGS-MBR demonstrated a stable removal of carbon (85–95%) and nitrogen (50–55%) in long-term operation. In addition, the membrane fouling propensity is apparently lower in AGS-MBRs with no membrane cleaning for 4 months at a flux of 20 L m−2h−1. The filtration resistance analysis indicates that the main membrane resistance was caused by irreversible fouling in both of the reactors. Membrane foulant analysis indicates that proteins in extracellular polymeric substances are more prone to be attached by the membrane of AGS-MBRs because of their hydrophobic nature. This study shows that AGS-MBR is effective and stable for municipal sewage treatment and reuse during long-term operation.

Download Full-text

Long-term effect of graphene oxide on the aerobic granular sludge wastewater treatment process

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2020.104853 ◽

2021 ◽

Vol 9 (1) ◽

pp. 104853

Author(s):

Alfonz Kedves ◽

Andrea Rónavári ◽

Zoltán Kónya

Keyword(s):

Wastewater Treatment ◽

Graphene Oxide ◽

Treatment Process ◽

Granular Sludge ◽

Term Effect ◽

Aerobic Granular Sludge ◽

Wastewater Treatment Process ◽

Long Term Effect

Download Full-text

Aerobic granular sludge technology: an alternative to activated sludge?

Water Science & Technology ◽

10.2166/wst.2004.0790 ◽

2004 ◽

Vol 49 (11-12) ◽

pp. 1-7 ◽

Cited By ~ 131

Author(s):

L.M.M. de Bruin ◽

M.K. de Kreuk ◽

H.F.R. van der Roest ◽

C. Uijterlinde ◽

M.C.M. van Loosdrecht

Keyword(s):

The Netherlands ◽

Activated Sludge ◽

Sewage Treatment ◽

Treatment Plant ◽

Granular Sludge ◽

Primary Treatment ◽

Aerobic Granular Sludge ◽

Batch Reactors ◽

Sequencing Batch Reactors ◽

Effluent Standards

Laboratory experiments have shown that it is possible to cultivate aerobic granular sludge in sequencing batch reactors. In order to direct future research needs and the critical points for successful implementation at large scale, a full detailed design of a potential application was made. The design was based on the laboratory results, and two variants of a full-scale sewage treatment plant based on Granular sludge Sequencing Batch Reactors (GSBRs) were evaluated. As a reference a conventional treatment plant based on activated sludge technology was designed for the same case. Based on total annual costs both GSBR variants proved to be more attractive than the reference alternative (7-17% lower costs). From a sensitivity analysis it appeared that the GSBR technology was less sensitive to the land price and more sensitive to a rain weather flow (RWF). This means that the GSBR technology becomes more attractive at lower permissible RWF/DWF ratios and higher land prices. The footprint of the GSBR variants was only 25% compared to the reference. However, the GSBR with primary treatment only cannot meet the present effluent standards for municipal wastewater in The Netherlands, mainly because of a too high suspended solids concentration in the effluent. A growing number of sewage treatment plants in the Netherlands are going to be faced with more stringent effluent standards. In general, activated sludge plants will have to be extended with a post treatment step (e.g. sand filtration) or be transformed into Membrane Bioreactors. In this case a GSBR variant with primary treatment as well as post treatment can be an attractive alternative.

Download Full-text