dc.contributor.authorAgarwal, Ashutosh
dc.contributor.authorXu, Huijuan
dc.contributor.authorNg, Wun Jern
dc.contributor.authorLiu, Yu
dc.identifier.citationAgarwal, A., Xu, H., Ng, W. J., & Liu, Y. (2012). Biofilm detachment by self-collapsing air microbubbles: a potential chemical-free cleaning technology for membrane biofouling. Journal of Materials Chemistry, 22(5), 2203-2207.en_US
dc.description.abstractMicrobubbles (MBs) have been known for their ability to generate pressure waves through shrinking and subsequent self-collapsing phenomenon. In the present study, we have investigated the potential of air MBs for biofilm detachment from a nylon membrane surface in comparison to chemical cleaning by sodium hypochloride (NaOCl). About 88% of fixed biomass detachment was observed after 1 h air microbubbling, while only 10% of biofilm detachment was achieved in the control experiment without microbubbles. Images taken with a confocal laser scanning microscope (CLSM) clearly showed that nearly all extracellular polysaccharides and proteins in biofilms were removed from the membrane surface, indicating a complete disruption of the extracellular polymeric matrix of biofilms. It was further demonstrated that microbubbling is much more efficient than chemical cleaning with 0.5% NaOCl solution in terms of removal of fixed biomass and extracellular polysaccharides and proteins. This study provides experimental evidence showing that self-collapsing air MBs is a chemical-free and eco-friendly technology for biofilm detachment.en_US
dc.relation.ispartofseriesJournal of materials chemistryen_US
dc.rights© 2012 Royal Society of Chemistry.en_US
dc.titleBiofilm detachment by self-collapsing air microbubbles : a potential chemical-free cleaning technology for membrane biofoulingen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US

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