Comparison of membrane foulants occurred under different sub-critical flux conditions in a membrane bioreactor (MBR)

Tran Ngoc Phu Nguyen, Yu Chun Su, Jill Ruhsing Pan, Ch-Hpin Huang*

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Membrane fouling precludes the widespread application of membrane filtration system from treating wastewater and drinking water, and occurs even under sub-critical flux operations. Hence the characteristics and behavior of membrane foulants should be thoroughly investigated, so as to find ways to reduce membrane fouling in membrane bioreactors. The purpose of this study is to compare the membrane fouling potential at different sub-critical flux operations and for different hydrophobic/hydrophilic membranes, and to investigate the vertical distribution of membrane foulants in a cake layer. Results showed that higher fouling propensity which occurred under 80% of critical flux of hydrophilic membrane was associated with the soluble fraction of proteins and polysaccharides, compared with 60% of critical flux. The cell-bound components were dominant under hydrophobic membrane operation. The highest concentration of proteins and polysaccharides was found between 40% and 80% of the depth of the cake layer.

Original languageEnglish
Pages (from-to)389-394
Number of pages6
JournalBioresource Technology
Volume166
DOIs
StatePublished - 1 Jan 2014

Keywords

  • Extracellular polymeric substances
  • Membrane bioreactor
  • Membrane foulants
  • Sub-critical flux

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