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Article: Accumulation of biopolymer clusters in a submerged membrane bioreactor and its effect on membrane fouling

TitleAccumulation of biopolymer clusters in a submerged membrane bioreactor and its effect on membrane fouling
Authors
KeywordsBiological wastewater treatment
Biopolymer clusters (BPC)
Membrane bioreactor (MBR)
Membrane fouling
Trans-membrane pressure (TMP)
Issue Date2008
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres
Citation
Water Research, 2008, v. 42 n. 4-5, p. 855-862 How to Cite?
AbstractA laboratory-scale submerged membrane bioreactor (SMBR) with a hollow-fibre membrane module was used to investigate membrane fouling under various operational conditions. The results showed that the sludge supernatant inside the SMBR had a consistently higher organic content than the MBR effluent. Detailed analysis revealed a pool of organic substances, classified as biopolymer clusters (BPC), in the SMBR system that were larger in size than the soluble microbial products (SMP). The BPC content in the MBR sludge mixture ranged from 0.7 to 18.8 mg/L in terms of the total organic carbon (TOC), with an average of 5.6±3.5 mg/L, which was about twice the SMP concentration in the suspension. Under a fluorescent microscope and using DAPI staining, the BPC in the sludge supernatant after centrifugation were found to be particulate organic substances that were independent of the sludge flocs and had a size distribution up to 50 μm. The findings of the experiment suggest that BPC are an important foulant and have a profound effect on membrane fouling. The fouling rate in the reactor, as indicated by the increase in trans-membrane pressure (TMP), correlates to a certain extent with the BPC concentration in the sludge suspension under various conditions. It is argued that BPC are a special form of organic substances that are formed by the adsorption and affinity clustering of mainly SMP within the sludge layer deposited on the membrane surface. The BPC can be detached with the sludge from the membrane and returned to the suspension. The accumulation of BPC in the SMBR sludge mixture would facilitate the formation of a sludge fouling layer on the membrane surface, thus causing a serious fouling problem. © 2007 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/132406
ISSN
2015 Impact Factor: 5.991
2015 SCImago Journal Rankings: 2.772
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, XMen_HK
dc.contributor.authorLi, XYen_HK
dc.date.accessioned2011-03-28T09:24:11Z-
dc.date.available2011-03-28T09:24:11Z-
dc.date.issued2008en_HK
dc.identifier.citationWater Research, 2008, v. 42 n. 4-5, p. 855-862en_HK
dc.identifier.issn0043-1354en_HK
dc.identifier.urihttp://hdl.handle.net/10722/132406-
dc.description.abstractA laboratory-scale submerged membrane bioreactor (SMBR) with a hollow-fibre membrane module was used to investigate membrane fouling under various operational conditions. The results showed that the sludge supernatant inside the SMBR had a consistently higher organic content than the MBR effluent. Detailed analysis revealed a pool of organic substances, classified as biopolymer clusters (BPC), in the SMBR system that were larger in size than the soluble microbial products (SMP). The BPC content in the MBR sludge mixture ranged from 0.7 to 18.8 mg/L in terms of the total organic carbon (TOC), with an average of 5.6±3.5 mg/L, which was about twice the SMP concentration in the suspension. Under a fluorescent microscope and using DAPI staining, the BPC in the sludge supernatant after centrifugation were found to be particulate organic substances that were independent of the sludge flocs and had a size distribution up to 50 μm. The findings of the experiment suggest that BPC are an important foulant and have a profound effect on membrane fouling. The fouling rate in the reactor, as indicated by the increase in trans-membrane pressure (TMP), correlates to a certain extent with the BPC concentration in the sludge suspension under various conditions. It is argued that BPC are a special form of organic substances that are formed by the adsorption and affinity clustering of mainly SMP within the sludge layer deposited on the membrane surface. The BPC can be detached with the sludge from the membrane and returned to the suspension. The accumulation of BPC in the SMBR sludge mixture would facilitate the formation of a sludge fouling layer on the membrane surface, thus causing a serious fouling problem. © 2007 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watresen_HK
dc.relation.ispartofWater Researchen_HK
dc.subjectBiological wastewater treatmenten_US
dc.subjectBiopolymer clusters (BPC)-
dc.subjectMembrane bioreactor (MBR)-
dc.subjectMembrane fouling-
dc.subjectTrans-membrane pressure (TMP)-
dc.subject.meshBiopolymers - analysisen_HK
dc.subject.meshBioreactorsen_HK
dc.subject.meshHumic Substances - analysisen_HK
dc.subject.meshMembranes, Artificialen_HK
dc.subject.meshPolysaccharides - analysisen_HK
dc.subject.meshProteins - analysisen_HK
dc.subject.meshSewage - analysisen_HK
dc.subject.meshWaste Disposal, Fluid - methodsen_HK
dc.titleAccumulation of biopolymer clusters in a submerged membrane bioreactor and its effect on membrane foulingen_HK
dc.typeArticleen_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.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.watres.2007.08.031en_HK
dc.identifier.pmid17889249-
dc.identifier.scopuseid_2-s2.0-38949181522en_HK
dc.identifier.hkuros149573-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-38949181522&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume42en_HK
dc.identifier.issue4-5en_HK
dc.identifier.spage855en_HK
dc.identifier.epage862en_HK
dc.identifier.eissn1879-2448-
dc.identifier.isiWOS:000254111000003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridWang, XM=23092524200en_HK
dc.identifier.scopusauthoridLi, XY=26642887900en_HK

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