Use of rhamnolipid biosurfactant for membrane biofouling prevention and cleaning

Lan Hee Kim, Yongmoon Jung, Sung Jo Kim, Chang Min Kim, Hye Weon Yu, Hee Deung Park, In S. Kim

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Rhamnolipids were evaluated as biofouling reducing agents in this study. The permeability of the bacterial outer membrane was increased by rhamnolipids while the growth rate of Pseudomonas aeruginosa was not affected. The surface hydrophobicity was increased through the release of lipopolysaccharides and extracellular polymeric substances from the outer cell membrane. Rhamnolipids were evaluated as agents for the prevention and cleaning of biofilms. A high degree of biofilm detachment was observed when the rhamnolipids were used as a cleaning agent. In addition, effective biofilm reduction occurred when rhamnolipids were applied to various species of Gram-negative bacteria isolated from seawater samples. Biofilm reduction using rhamnolipids was comparable to commercially available surfactants. In addition, 20% of the water flux was increased after rhamnolipid treatment (300 μg ml-1, 6 h exposure time) in a dead-end filtration system. Rhamnolipids appear to have promise as biological agents for reducing membrane biofouling.

Original languageEnglish
Pages (from-to)211-220
Number of pages10
JournalBiofouling
Volume31
Issue number2
DOIs
Publication statusPublished - 2015 Jan 1

Keywords

  • Biofouling reduction
  • Pseudomonas aeruginosa
  • Reverse osmosis membrane
  • Rhamnolipid

ASJC Scopus subject areas

  • Aquatic Science
  • Applied Microbiology and Biotechnology
  • Water Science and Technology

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