UM  > Personal research not belonging to the institution
Residential Collegefalse
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
Source PublicationWater Research

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
URLView the original
Indexed BySCIE
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Water Resources
WOS IDWOS:000386401900016
Scopus ID2-s2.0-84981186636
Fulltext Access
Citation statistics
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Tsui,To Hung]'s Articles
[Chen,Lin]'s Articles
[Hao,Tianwei]'s Articles
Baidu academic
Similar articles in Baidu academic
[Tsui,To Hung]'s Articles
[Chen,Lin]'s Articles
[Hao,Tianwei]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Tsui,To Hung]'s Articles
[Chen,Lin]'s Articles
[Hao,Tianwei]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.