Biofouling development and rejection enhancement in long SRT MF membrane bioreactor

This study was conducted to investigate the development and extracellular polymeric substances (EPS) distribution in biofouling layer and biofouling effect on permeate quality. The experimental results suggested that formation of biofouling layer was started by the attachment of polysaccharides and...

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Published inProcess biochemistry (1991) Vol. 42; no. 12; pp. 1641 - 1648
Main Authors Khor, Swee Loong, Sun, Darren Delai, Liu, Yajuan, Leckie, James O.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.12.2007
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Abstract This study was conducted to investigate the development and extracellular polymeric substances (EPS) distribution in biofouling layer and biofouling effect on permeate quality. The experimental results suggested that formation of biofouling layer was started by the attachment of polysaccharides and formed a biogel like layer on top of membrane surface (adhesive attachment). It further induced the attachment of protein, polysaccharides and bioparticles, and formed cake layer (cohesive attachment). As evidenced in SEM photos and permeates quality, the formed biofouling layer had changed the properties of membrane surface such as the pore and porosity, and hence produce the better permeates quality. A great enhancement of rejection performance occurred at the early filtration period, and followed by a slight enhancement in rejection throughout the entire filtration. This enhancement of rejection performance by biofouling layer can be mathematically expressed by the logarithm function with the degree of membrane fouling.
AbstractList This study was conducted to investigate the development and extracellular polymeric substances (EPS) distribution in biofouling layer and biofouling effect on permeate quality. The experimental results suggested that formation of biofouling layer was started by the attachment of polysaccharides and formed a biogel like layer on top of membrane surface (adhesive attachment). It further induced the attachment of protein, polysaccharides and bioparticles, and formed cake layer (cohesive attachment). As evidenced in SEM photos and permeates quality, the formed biofouling layer had changed the properties of membrane surface such as the pore and porosity, and hence produce the better permeates quality. A great enhancement of rejection performance occurred at the early filtration period, and followed by a slight enhancement in rejection throughout the entire filtration. This enhancement of rejection performance by biofouling layer can be mathematically expressed by the logarithm function with the degree of membrane fouling.
Author Liu, Yajuan
Khor, Swee Loong
Sun, Darren Delai
Leckie, James O.
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  organization: Department of Civil and Environmental Engineering, School of Engineering, Stanford University, Stanford, CA 94305-4020, USA
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Keywords Membrane morphology
EPS
Membrane rejection
Biofouling
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Snippet This study was conducted to investigate the development and extracellular polymeric substances (EPS) distribution in biofouling layer and biofouling effect on...
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SubjectTerms Biofouling
EPS
Membrane morphology
Membrane rejection
Title Biofouling development and rejection enhancement in long SRT MF membrane bioreactor
URI https://dx.doi.org/10.1016/j.procbio.2007.09.009
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