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Article: Membrane fouling in a submerged membrane bioreactor (SMBR): Characterisation of the sludge cake and its high filtration resistance

TitleMembrane fouling in a submerged membrane bioreactor (SMBR): Characterisation of the sludge cake and its high filtration resistance
Authors
KeywordsBiopolymer clusters (BPC)
Membrane bioreactor (MBR)
Membrane filtration
Membrane fouling
Sludge cake
Wastewater treatment
Water purification
Issue Date2007
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/seppur
Citation
Separation And Purification Technology, 2007, v. 52 n. 3, p. 439-445 How to Cite?
AbstractThe attachment of sludge cake to the membrane surface is the main cause of the fouling problem in the submerged membrane bioreactors (SMBR) used in biological wastewater treatment. In this laboratory study, the sludge cake deposited on the membrane was found to have a specific filtration resistance of the order of 1014 m/kg, which is much greater than expected for sludge cake formed during the dewatering of activated sludge. The filterability tests showed that the cake sludge removed from the fouled membrane of the SMBR had an average specific filtration resistance of 4.9 × 1013 m/kg, whereas the sludge cake of the SMBR bulk sludge had an average filtration resistance of only 1.9 × 1011 m/kg. Detailed chemical analysis showed there was a pool of biopolymer clusters (BPC) that was trapped within the sludge cake on the membrane. These clusters could be readily separated from the cake sludge by stirring it into a suspension. The abundance of non-filterable BPC as measured by the total organic carbon (TOC) in the suspended solids (SS) was about 10.3 mg/g SS for the cake sludge, in comparison to 0.4 mg/g SS for the bulk sludge. When the BPC were removed from the cake sludge, the filtration resistance of the cake sludge could be reduced considerably from 4.9 × 1013 to 8.4 × 1012 m/kg. It is argued that the BPC are a special form of organic matter formed by affinity clustering of the free extracellular polymeric substances (EPS) and soluble microbial products (SMP) in the sludge cake deposited on the membrane surface. The accumulation of BPC within the pores of the sludge cake is mostly responsible for the unusually high filtration resistance of the cake sludge during the SMBR operation. © 2006 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/54266
ISSN
2015 Impact Factor: 3.299
2015 SCImago Journal Rankings: 1.100
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, XMen_HK
dc.contributor.authorLi, XYen_HK
dc.contributor.authorHuang, Xen_HK
dc.date.accessioned2009-04-03T07:41:35Z-
dc.date.available2009-04-03T07:41:35Z-
dc.date.issued2007en_HK
dc.identifier.citationSeparation And Purification Technology, 2007, v. 52 n. 3, p. 439-445en_HK
dc.identifier.issn1383-5866en_HK
dc.identifier.urihttp://hdl.handle.net/10722/54266-
dc.description.abstractThe attachment of sludge cake to the membrane surface is the main cause of the fouling problem in the submerged membrane bioreactors (SMBR) used in biological wastewater treatment. In this laboratory study, the sludge cake deposited on the membrane was found to have a specific filtration resistance of the order of 1014 m/kg, which is much greater than expected for sludge cake formed during the dewatering of activated sludge. The filterability tests showed that the cake sludge removed from the fouled membrane of the SMBR had an average specific filtration resistance of 4.9 × 1013 m/kg, whereas the sludge cake of the SMBR bulk sludge had an average filtration resistance of only 1.9 × 1011 m/kg. Detailed chemical analysis showed there was a pool of biopolymer clusters (BPC) that was trapped within the sludge cake on the membrane. These clusters could be readily separated from the cake sludge by stirring it into a suspension. The abundance of non-filterable BPC as measured by the total organic carbon (TOC) in the suspended solids (SS) was about 10.3 mg/g SS for the cake sludge, in comparison to 0.4 mg/g SS for the bulk sludge. When the BPC were removed from the cake sludge, the filtration resistance of the cake sludge could be reduced considerably from 4.9 × 1013 to 8.4 × 1012 m/kg. It is argued that the BPC are a special form of organic matter formed by affinity clustering of the free extracellular polymeric substances (EPS) and soluble microbial products (SMP) in the sludge cake deposited on the membrane surface. The accumulation of BPC within the pores of the sludge cake is mostly responsible for the unusually high filtration resistance of the cake sludge during the SMBR operation. © 2006 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/seppuren_HK
dc.relation.ispartofSeparation and Purification Technologyen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectBiopolymer clusters (BPC)en_HK
dc.subjectMembrane bioreactor (MBR)en_HK
dc.subjectMembrane filtrationen_HK
dc.subjectMembrane foulingen_HK
dc.subjectSludge cakeen_HK
dc.subjectWastewater treatmenten_HK
dc.subjectWater purificationen_HK
dc.titleMembrane fouling in a submerged membrane bioreactor (SMBR): Characterisation of the sludge cake and its high filtration resistanceen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1383-5866&volume=52&issue=3&spage=439&epage=445&date=2007&atitle=Membrane+fouling+in+a+submerged+membrane+bioreactor+(SMBR):+Characterisation+of+the+sludge+cake+and+its+high+filtration+resistanceen_HK
dc.identifier.emailWang, XM: wangxm@hku.hken_HK
dc.identifier.emailLi, XY: xlia@hkucc.hku.hken_HK
dc.identifier.authorityWang, XM=rp01452en_HK
dc.identifier.authorityLi, XY=rp00222en_HK
dc.description.naturepostprinten_HK
dc.identifier.doi10.1016/j.seppur.2006.05.025en_HK
dc.identifier.scopuseid_2-s2.0-33751350887en_HK
dc.identifier.hkuros125588-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33751350887&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume52en_HK
dc.identifier.issue3en_HK
dc.identifier.spage439en_HK
dc.identifier.epage445en_HK
dc.identifier.isiWOS:000243626200005-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridWang, XM=23092524200en_HK
dc.identifier.scopusauthoridLi, XY=26642887900en_HK
dc.identifier.scopusauthoridHuang, X=26643260700en_HK

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