Use of rhamnolipid biosurfactant for membrane biofouling prevention and cleaning

Biofouling
Lan Hee KimI S Kim

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.

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Citations

Dec 26, 2017·Frontiers in Microbiology·Ivana AleksicLidija Senerovic
Nov 30, 2018·Applied Microbiology and Biotechnology·Hui HuangHongqiang Ren
Jun 10, 2018·Microbial Cell Factories·Yun Nian Tan, Qingxin Li
Apr 7, 2018·The Science of the Total Environment·Zhuotong ZengLei Qin

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Methods Mentioned

BETA
PCR

Software Mentioned

GraphPad
BLAST

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