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dc.contributor.authorVillacorte, Loreen O.
dc.contributor.authorEkowati, Yuli
dc.contributor.authorWinters, Harvey
dc.contributor.authorAmy, Gary L.
dc.contributor.authorSchippers, Jan Cornelis
dc.contributor.authorKennedy, Maria Dolores
dc.date.accessioned2015-08-03T12:35:41Z
dc.date.available2015-08-03T12:35:41Z
dc.date.issued2015-07
dc.identifier.issn00119164
dc.identifier.doi10.1016/j.desal.2015.03.027
dc.identifier.urihttp://hdl.handle.net/10754/564188
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.
dc.publisherElsevier BV
dc.subjectAlgal blooms
dc.subjectAlgal organic matter
dc.subjectMembrane fouling
dc.subjectMF/UF pretreatment
dc.subjectTransparent exopolymer particles
dc.titleMF/UF rejection and fouling potential of algal organic matter from bloom-forming marine and freshwater algae
dc.typeArticle
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalDesalination
dc.contributor.institutionUNESCO-IHE Institute for Water Education, Westvest 7Delft, Netherlands
dc.contributor.institutionWetsus Center of Excellence for Sustainable Water Technology, Agora 1Leeuwarden, Netherlands
dc.contributor.institutionFairleigh Dickinson UniversityTeaneck, NJ, United States
dc.contributor.institutionDelft University of Technology, Stevinweg 1Delft, Netherlands
kaust.personAmy, Gary L.
kaust.personWinters, Harvey


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