title: Cleaning efficacy of hydroxypropyl-beta-cyclodextrin for biofouling reduction on reverse osmosis membranes.
abstract: In this study, an environmentally friendly compound, hydroxypropyl-beta-cyclodextrin (HP-β-CD) was applied to clean reverse osmosis (RO) membranes fouled by microorganisms. The cleaning with HP-β-CD removed the biofilm and resulted in a flux recovery ratio (FRR) of 102%. As cleaning efficiency is sometimes difficult to determine using flux recovery data alone, attached bacterial cells and extracellular polymeric substances (EPS) were quantified after cleaning the biofouled membrane with HP-β-CD. Membrane surface characterization using scanning electron microscopy (SEM), attenuated total reflectance Fourier transform infrared (ATR-FTIR) and atomic force microscopy (AFM) confirmed the effectiveness of HP-β-CD in removal of biofilm from the RO membrane surface. Finally, a comparative study was performed to investigate the competitiveness of HP-β-CD with other known cleaning agents such as sodium dodecyl sulfate (SDS), ethylenediaminetetraacetic acid (EDTA), Tween 20, rhamnolipid, nisin, and surfactin. In all cases, HP-β-CD was superior.
authors.affiliation: a Global Desalination Research Center (GDRC), School of Environmental Science and Engineering , Gwangju Institute of Science and Technology (GIST) , Gwangju , Republic of Korea.
authors.forename: Abayomi Babatunde
authors.initials: AB
authors.lastname: Alayande
authors.affiliation: a Global Desalination Research Center (GDRC), School of Environmental Science and Engineering , Gwangju Institute of Science and Technology (GIST) , Gwangju , Republic of Korea.
authors.forename: Lan Hee
authors.initials: LH
authors.lastname: Kim
authors.affiliation: a Global Desalination Research Center (GDRC), School of Environmental Science and Engineering , Gwangju Institute of Science and Technology (GIST) , Gwangju , Republic of Korea.
authors.forename: In S
authors.initials: IS
authors.lastname: Kim
mesh_terms: D000073738:2-Hydroxypropyl-beta-cyclodextrin; D018441:Biofilms / Q000187:drug effects / Q000254:growth & development; D057219:Biofouling / Q000517:prevention & control*; D057186:Comparative Effectiveness Research; D003902:Detergents / Q000494:pharmacology; D004492:Edetic Acid / Q000494:pharmacology; D006801:Humans; D008567:Membranes, Artificial; D064688:Metabolic Flux Analysis / Q000379:methods; D018625:Microscopy, Atomic Force / Q000379:methods; D008855:Microscopy, Electron, Scanning / Q000379:methods; D009995:Osmosis; D012967:Sodium Dodecyl Sulfate / Q000494:pharmacology; D016896:Treatment Outcome; D018508:Water Purification / Q000379:methods*; D047392:beta-Cyclodextrins / Q000494:pharmacology*
chemical_list: D003902:Detergents; D008567:Membranes, Artificial; D047392:beta-Cyclodextrins; D000073738:2-Hydroxypropyl-beta-cyclodextrin; D012967:Sodium Dodecyl Sulfate; D004492:Edetic Acid
keywords: Biofouling; biofilm; cleaning efficiency; hydroxypropyl-beta-cyclodextrin; permeate flux; reverse osmosis membrane