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Conference Paper: Modeling and verification of selective sludge discharge as the controlling factor for aerobic granulation

TitleModeling and verification of selective sludge discharge as the controlling factor for aerobic granulation
Authors
KeywordsActivated sludge
Aerobic granulation
Biological wastewater treatment
Issue Date2010
PublisherIWA Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwst
Citation
The 3rd IWA-ASPIRE (International Water Association-Asia-Pacific Regional Group) Conference and Exhibition, Taipei, Taiwan, 18-22 October 2009. In Water Science And Technology, 2010, v. 62 n. 10, p. 2442-2449 How to Cite?
AbstractMathematical simulation and laboratory experiments were conducted to investigate the controlling factor for aerobic sludge granulation. A model was used to describe the biomass dynamics during the granulation process. The simulation results indicate that the selective discharge of small and loose sludge flocs is the key controlling factor for granulation. In the experimental studies, tests were conducted with four batch column reactors (BCR) that were seeded with both activated sludge flocs and mature granules. Three different sludge discharge methods were tested, including unselective discharge of mixed sludge, selective discharge of small and slow-settling flocs, and selective discharge of settled dense sludge. The results show that mixed sludge discharge and discharge of dense sludge resulted in disappearance of granules from the reactors. Only selective discharge of small and slow-settling sludge flocs led to complete granulation. Small and loose sludge flocs were found to have a clear advantage over large and dense granules in substrate uptake. It can be concluded that selective discharge of loose flocs removes these competitors in suspended-growth mode from the reactors and makes the substrate more available for uptake and utilization by the biomass in attached-growth form, leading to granulation. © IWA Publishing 2010.
Persistent Identifierhttp://hdl.handle.net/10722/137232
ISSN
2015 Impact Factor: 1.064
2015 SCImago Journal Rankings: 0.469
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council (RGC)HKU7144/E07
University Grants Council (UGC)SEG_HKU10
Natural Science Foundation of China50828802
Funding Information:

This research was supported by grants HKU7144/E07 from the Research Grants Council (RGC) and SEG_HKU10 from the University Grants Council (UGC) of the Hong Kong SAR Government and grant 50828802 from the Natural Science Foundation of China. The technical assistance of Mr. Keith C.H. Wong is highly appreciated.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorLi, AJen_HK
dc.contributor.authorZhang, Ten_HK
dc.contributor.authorLi, XYen_HK
dc.date.accessioned2011-08-26T14:21:37Z-
dc.date.available2011-08-26T14:21:37Z-
dc.date.issued2010en_HK
dc.identifier.citationThe 3rd IWA-ASPIRE (International Water Association-Asia-Pacific Regional Group) Conference and Exhibition, Taipei, Taiwan, 18-22 October 2009. In Water Science And Technology, 2010, v. 62 n. 10, p. 2442-2449en_HK
dc.identifier.issn0273-1223en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137232-
dc.description.abstractMathematical simulation and laboratory experiments were conducted to investigate the controlling factor for aerobic sludge granulation. A model was used to describe the biomass dynamics during the granulation process. The simulation results indicate that the selective discharge of small and loose sludge flocs is the key controlling factor for granulation. In the experimental studies, tests were conducted with four batch column reactors (BCR) that were seeded with both activated sludge flocs and mature granules. Three different sludge discharge methods were tested, including unselective discharge of mixed sludge, selective discharge of small and slow-settling flocs, and selective discharge of settled dense sludge. The results show that mixed sludge discharge and discharge of dense sludge resulted in disappearance of granules from the reactors. Only selective discharge of small and slow-settling sludge flocs led to complete granulation. Small and loose sludge flocs were found to have a clear advantage over large and dense granules in substrate uptake. It can be concluded that selective discharge of loose flocs removes these competitors in suspended-growth mode from the reactors and makes the substrate more available for uptake and utilization by the biomass in attached-growth form, leading to granulation. © IWA Publishing 2010.en_HK
dc.languageengen_US
dc.publisherIWA Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwsten_HK
dc.relation.ispartofWater Science and Technologyen_HK
dc.rightsWater Science and Technology. Copyright © IWA Publishing.-
dc.subjectActivated sludgeen_HK
dc.subjectAerobic granulationen_HK
dc.subjectBiological wastewater treatmenten_HK
dc.subject.meshAerobiosis-
dc.subject.meshBiomass-
dc.subject.meshBioreactors-
dc.subject.meshSewage-
dc.subject.meshWaste Disposal, Fluid - methods-
dc.titleModeling and verification of selective sludge discharge as the controlling factor for aerobic granulationen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0273-1223&volume=62&issue=10&spage=2442&epage=2449&date=2010&atitle=Modeling+and+verification+of+selective+sludge+discharge+as+the+determining+factor+for+aerobic+granulation-
dc.identifier.emailZhang, T: zhangt@hkucc.hku.hken_HK
dc.identifier.emailLi, XY: xlia@hkucc.hku.hken_HK
dc.identifier.authorityZhang, T=rp00211en_HK
dc.identifier.authorityLi, XY=rp00222en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.2166/wst.2010.488en_HK
dc.identifier.pmid21076232-
dc.identifier.scopuseid_2-s2.0-79951641766en_HK
dc.identifier.hkuros178467en_US
dc.identifier.hkuros190451-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79951641766&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume62en_HK
dc.identifier.issue10en_HK
dc.identifier.spage2442en_HK
dc.identifier.epage2449en_HK
dc.identifier.isiWOS:000284355400028-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectEnvironmental Bio-Nano Interface (EBNI) Characterization System-
dc.identifier.scopusauthoridLi, AJ=36975575100en_HK
dc.identifier.scopusauthoridZhang, T=24470677400en_HK
dc.identifier.scopusauthoridLi, XY=26642887900en_HK
dc.customcontrol.immutablesml 160106 - merged-

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