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|Title:||Biofilm detachment by self-collapsing air microbubbles : a potential chemical-free cleaning technology for membrane biofouling||Authors:||Agarwal, Ashutosh
Ng, Wun Jern
|Issue Date:||2012||Source:||Agarwal, 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.||Series/Report no.:||Journal of materials chemistry||Abstract:||Microbubbles (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.||URI:||https://hdl.handle.net/10356/96724
|DOI:||10.1039/c1jm14439a||Rights:||© 2012 Royal Society of Chemistry.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||CEE Journal Articles|
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