Effect of broad-spectrum biofilm inhibitor raffinose, a plant galactoside, on the inhibition of co-culture biofilm on the microfiltration membrane

Han Shin Kim, Yongsun Jang, So Young Ham, Jeong Hoon Park, Hyun Jin Kang, Eun Tae Yun, Dong Hyup Shin, Kyoung Chul Kim, Hee Deung Park

Research output: Contribution to journalArticlepeer-review

Abstract

A membrane bioreactor (MBR) integrates process such as membrane filtration and biological treatment of activated sludge. However, organic, inorganic and biological matters cause membrane fouling, which seriously affects membrane performance. The goal of this study was to evaluate the biofouling inhibition capacity of raffinose during the MBR process. The results showed that 0–1,000 μM raffinose significantly reduced the formation of the P. aeruginosa and S. aureus co-culture biofilm by about 25–52 % in a concentration-dependent manner. In addition, the effect of raffinose on the microfiltration membrane biofilm was tested in a flow reactor and lab-scale MBR unit. The results showed that the co-culture biofilm and transmembrane pressure were decreased by raffinose treatment compared to those by furanone C-30 treatment. These results clearly demonstrated that raffinose, broad-spectrum biofilm inhibitor, inhibits biofilm formation in mixed cultures and could be used to mitigate biofouling in MBR processes.

Original languageEnglish
Article number123501
Pages (from-to)123501
JournalJournal of hazardous materials
Volume402
Early online date2020 Jul 16
DOIs
Publication statusPublished - 2021 Jan 15

Keywords

  • Biofilm inhibition
  • Co-culture biofilm
  • Microfiltration membrane
  • Pseudomonas aeruginosa
  • Raffinose
  • Staphylococcus aureus

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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