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A super high-rate sulfidogenic system for saline sewage treatment
Tsui,To Hung1,2,3; Chen,Lin1,2,3; Hao,Tianwei1,2,3; Chen,Guang Hao1,2,3,4
2016-11
Source PublicationWater Research
ISSN0043-1354
Volume104Pages:147-155
Abstract

This study proposes a novel approach to resolve the challenging issue of sludge bed clogging in a granular sulfate-reducing upflow sludge bed (GSRUSB) reactor by means of introducing intermittent gas sparging to advance it into a super high-rate anaerobic bioreactor. Over a 196-day lab-scale trial, the GSRUSB system was operated from nominal hydraulic retention time of 4-hr to 40-min and achieved the highest organic loading rate of 13.31 kg COD/m ·day which is substantially greater than the typical loading of 2.0–3.5 kg COD/m ·day in a conventional upflow anaerobic sludge bed reactor treating dilute organic strength wastewater. The average organic removal efficiency and total dissolved sulfide of this system were 90 ± 4.2% and 158 ± 28 mg S/L, while organics residual in the effluent was 34 ± 14 mg COD/L. The control stage (without gas sparging) revealed that the sludge bed clogging happened concomitantly with the significant drop in extracellular polymeric substance content of granular sludge, through relevant chemical measurements and confocal laser scanning microscopy analyses. On the other hand, compared with increasing the effluent recirculation ratio (from 1.4 to 5), the three-dimensional computational fluid dynamics modeling in combination with energy dissipation analysis demonstrated that the gas sparging (at a superficial gas velocity of 0.8 m s ) can create a 23 times higher liquid shear as well as enhanced particle attrition. Overall, this study not only developed a super high-rate anaerobic bioreactor for saline sewage treatment, but also shed light on the role of intermittent gas sparging in control of sludge bed clogging for anaerobic bioreactors.

KeywordIntermittent Gas Sparging Saline Sewage Sani Process Sludge Bed Clogging Sulfidogenic System
DOI10.1016/j.watres.2016.08.013
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Water Resources
WOS IDWOS:000386401900016
PublisherPERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Scopus ID2-s2.0-84981186636
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Document TypeJournal article
CollectionPersonal research not belonging to the institution
Corresponding AuthorHao,Tianwei; Chen,Guang Hao
Affiliation1.Department of Civil & Environmental EngineeringThe Hong Kong University of Science and Technology,China
2.Water Technology LaboratoryThe Hong Kong University of Science and Technology,China
3.Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal PollutionThe Hong Kong University of Science and Technology,China
4.Wastewater Treatment LaboratoryFYT Graduate SchoolThe Hong Kong University of Science and Technology,Guangzhou,China
Recommended Citation
GB/T 7714
Tsui,To Hung,Chen,Lin,Hao,Tianwei,et al. A super high-rate sulfidogenic system for saline sewage treatment[J]. Water Research,2016,104:147-155.
APA Tsui,To Hung,Chen,Lin,Hao,Tianwei,&Chen,Guang Hao.(2016).A super high-rate sulfidogenic system for saline sewage treatment.Water Research,104,147-155.
MLA Tsui,To Hung,et al."A super high-rate sulfidogenic system for saline sewage treatment".Water Research 104(2016):147-155.
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