MF/UF rejection and fouling potential of algal organic matter from bloom-forming marine and freshwater algae

Handle URI:
http://hdl.handle.net/10754/564188
Title:
MF/UF rejection and fouling potential of algal organic matter from bloom-forming marine and freshwater algae
Authors:
Villacorte, Loreen O.; Ekowati, Yuli; Winters, Harvey; Amy, Gary L.; Schippers, Jan Cornelis; Kennedy, Maria Dolores
Abstract:
Pretreatment with microfiltration (MF) or ultrafiltration (UF) membranes has been proposed for seawater reverse osmosis (SWRO) plants to address operational issues associated with algal blooms. Here, we investigated the MF/UF rejection and fouling potential of algal organic matter (AOM) released by common species of bloom-forming marine (Alexandrium tamarense and Chaetoceros affinis) and freshwater (Microcystis sp.) algae. Batch culture monitoring of the three algal species illustrated varying growth pattern, cell concentration, AOM released and membrane fouling potential. The high membrane fouling potential of the cultures can be directly associated (R2>0.85) with AOM such as transparent exopolymer particle (TEP) while no apparent relationship with algal cell concentration was observed. The AOM comprised mainly biopolymers (e.g., polysaccharides and proteins) and low molecular weight organic compounds (e.g., humic-like substances). The former were largely rejected by MF/UF membranes while the latter were poorly rejected. MF (0.4μm and 0.1μm pore size) rejected 14%-56% of biopolymers while conventional UF (100kDa) and tight UF (10kDa) rejected up to 83% and 97%, respectively. The retention of AOM resulted in a rapid increase in trans-membrane pressure (δP) over time, characterised by pore blocking followed by cake filtration with enhanced compression as illustrated by an exponential progression of δP. © 2015 Elsevier B.V.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Elsevier BV
Journal:
Desalination
Issue Date:
Jul-2015
DOI:
10.1016/j.desal.2015.03.027
Type:
Article
ISSN:
00119164
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, Maria Doloresen
dc.date.accessioned2015-08-03T12:35:41Zen
dc.date.available2015-08-03T12:35:41Zen
dc.date.issued2015-07en
dc.identifier.issn00119164en
dc.identifier.doi10.1016/j.desal.2015.03.027en
dc.identifier.urihttp://hdl.handle.net/10754/564188en
dc.description.abstractPretreatment with microfiltration (MF) or ultrafiltration (UF) membranes has been proposed for seawater reverse osmosis (SWRO) plants to address operational issues associated with algal blooms. Here, we investigated the MF/UF rejection and fouling potential of algal organic matter (AOM) released by common species of bloom-forming marine (Alexandrium tamarense and Chaetoceros affinis) and freshwater (Microcystis sp.) algae. Batch culture monitoring of the three algal species illustrated varying growth pattern, cell concentration, AOM released and membrane fouling potential. The high membrane fouling potential of the cultures can be directly associated (R2>0.85) with AOM such as transparent exopolymer particle (TEP) while no apparent relationship with algal cell concentration was observed. The AOM comprised mainly biopolymers (e.g., polysaccharides and proteins) and low molecular weight organic compounds (e.g., humic-like substances). The former were largely rejected by MF/UF membranes while the latter were poorly rejected. MF (0.4μm and 0.1μm pore size) rejected 14%-56% of biopolymers while conventional UF (100kDa) and tight UF (10kDa) rejected up to 83% and 97%, respectively. The retention of AOM resulted in a rapid increase in trans-membrane pressure (δP) over time, characterised by pore blocking followed by cake filtration with enhanced compression as illustrated by an exponential progression of δP. © 2015 Elsevier B.V.en
dc.publisherElsevier BVen
dc.subjectAlgal bloomsen
dc.subjectAlgal organic matteren
dc.subjectMembrane foulingen
dc.subjectMF/UF pretreatmenten
dc.subjectTransparent exopolymer particlesen
dc.titleMF/UF rejection and fouling potential of algal organic matter from bloom-forming marine and freshwater algaeen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalDesalinationen
dc.contributor.institutionUNESCO-IHE Institute for Water Education, Westvest 7Delft, Netherlandsen
dc.contributor.institutionWetsus Center of Excellence for Sustainable Water Technology, Agora 1Leeuwarden, Netherlandsen
dc.contributor.institutionFairleigh Dickinson UniversityTeaneck, NJ, United Statesen
dc.contributor.institutionDelft University of Technology, Stevinweg 1Delft, Netherlandsen
kaust.authorAmy, Gary L.en
kaust.authorWinters, Harveyen
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