Characterisation of transparent exopolymer particles (TEP) produced during algal bloom: A membrane treatment perspective

Handle URI:
http://hdl.handle.net/10754/562591
Title:
Characterisation of transparent exopolymer particles (TEP) produced during algal bloom: A membrane treatment perspective
Authors:
Villacorte, Loreen O.; Ekowati, Yuli; Winters, Harvey; Amy, Gary L.; Schippers, Jan Cornelis; Kennedy, D.
Abstract:
Algal blooms are currently a major concern of the membrane industry as it generates massive concentrations of organic matter (e.g. transparent exopolymer particles [TEP]), which can adversely affect the operation of membrane filtration systems. The goal of this study is to understand the production, composition and membrane rejection of these organic materials using different characterisation techniques. Two common species of bloom-forming freshwater and marine algae were cultivated in batch cultures for 30days and the productions of TEP and other organic matter were monitored at different growth phases. TEP production of the marine diatom, Chaetoceros affinis, produced 6-9 times more TEP than the freshwater blue-green algae, Microcystis. The organic substances produced by both algal species were dominated by biopolymeric substances such as polysaccharides (45-64%) and proteins (2-17%) while the remaining fraction comprises of low molecular weight refractory (humic-like) and/ or biogenic organic substances. MF/UF membranes mainly rejected the biopolymers but not the low molecular weight organic materials. MF membranes (0.1-0.4 lm) rejected 42-56% of biopolymers, while UF membranes (10-100 kDa) rejected 65-95% of these materials. Further analysis of rejected organic materials on the surface of the membranes revealed that polysac-charides and proteins are likely responsible for the fouling of MF/UF systems during an algal bloom situation. © 2013 Desalination Publications.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Taylor & Francis
Journal:
Desalination and Water Treatment
Issue Date:
Jan-2013
DOI:
10.1080/19443994.2012.699359
Type:
Article
ISSN:
19443994
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorVillacorte, Loreen O.en
dc.contributor.authorEkowati, Yulien
dc.contributor.authorWinters, Harveyen
dc.contributor.authorAmy, Gary L.en
dc.contributor.authorSchippers, Jan Cornelisen
dc.contributor.authorKennedy, D.en
dc.date.accessioned2015-08-03T10:43:57Zen
dc.date.available2015-08-03T10:43:57Zen
dc.date.issued2013-01en
dc.identifier.issn19443994en
dc.identifier.doi10.1080/19443994.2012.699359en
dc.identifier.urihttp://hdl.handle.net/10754/562591en
dc.description.abstractAlgal blooms are currently a major concern of the membrane industry as it generates massive concentrations of organic matter (e.g. transparent exopolymer particles [TEP]), which can adversely affect the operation of membrane filtration systems. The goal of this study is to understand the production, composition and membrane rejection of these organic materials using different characterisation techniques. Two common species of bloom-forming freshwater and marine algae were cultivated in batch cultures for 30days and the productions of TEP and other organic matter were monitored at different growth phases. TEP production of the marine diatom, Chaetoceros affinis, produced 6-9 times more TEP than the freshwater blue-green algae, Microcystis. The organic substances produced by both algal species were dominated by biopolymeric substances such as polysaccharides (45-64%) and proteins (2-17%) while the remaining fraction comprises of low molecular weight refractory (humic-like) and/ or biogenic organic substances. MF/UF membranes mainly rejected the biopolymers but not the low molecular weight organic materials. MF membranes (0.1-0.4 lm) rejected 42-56% of biopolymers, while UF membranes (10-100 kDa) rejected 65-95% of these materials. Further analysis of rejected organic materials on the surface of the membranes revealed that polysac-charides and proteins are likely responsible for the fouling of MF/UF systems during an algal bloom situation. © 2013 Desalination Publications.en
dc.publisherTaylor & Francisen
dc.subjectAlgal bloomen
dc.subjectAlgal organic matteren
dc.subjectMF/ UF rejectionen
dc.subjectMF/UF foulingen
dc.subjectTransparent exopolymer particles (TEP)en
dc.titleCharacterisation of transparent exopolymer particles (TEP) produced during algal bloom: A membrane treatment perspectiveen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalDesalination and Water Treatmenten
dc.contributor.institutionUNESCO-IHE, Institute for Water Education, Westvest 7, 2611 AX, Delft, Netherlandsen
dc.contributor.institutionWetsus, Center of Excellence for Sustainable Water Technology, Agora 1, 8934 CJ, Leeuwarden, Netherlandsen
dc.contributor.institutionDelft University of Technology, Stevinweg 1, 2628 CN Delft, Netherlandsen
kaust.authorAmy, Gary L.en
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