title: Surface interactions and fouling properties of Micrococcus luteus with microfiltration membranes.
abstract: This study was conducted to investigate microbial adhesion of Micrococcus luteus to polypropylene (PP) and polyvinylidene fluoride (PVDF) membranes in relation to the variation of the interfacial energies in the membrane-bacteria systems, for revealing effects of short-range surface interactions on filtration behavior. Both the membranes and M. luteus showed typical strong electron donors and hydrophilic properties. The AB component was dominant in the interfacial energies of the two membrane-bacteria systems. M. luteus presented larger negative U(mlb)(XDLVO) to the PP membrane than to the PVDF membrane. The adhesion experiments also proved that M. luteus had higher adhesion percentage to the PP membrane. This study demonstrated that the adhesion potentials of M. luteus to the PP and PVDF membranes might be explained in terms of bacterium, membrane, and intervening medium surface properties, which are mainly determined by the interfacial energies in the systems according to the XDLVO theory.
authors.affiliation: Resource and Environment College, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian province, People's Republic of China. fengleisp@126.com
authors.forename: Lei
authors.initials: L
authors.lastname: Feng
authors.forename: Xiufen
authors.initials: X
authors.lastname: Li
authors.forename: Ping
authors.initials: P
authors.lastname: Song
authors.forename: Guocheng
authors.initials: G
authors.lastname: Du
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
mesh_terms: D001422:Bacterial Adhesion; D019149:Bioreactors / Q000382:microbiology; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D008567:Membranes, Artificial; D016982:Micrococcus luteus / Q000502:physiology*; D011126:Polypropylenes / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry; D013499:Surface Properties; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D005465:Fluorocarbon Polymers
chemical_list: D008567:Membranes, Artificial; D011126:Polypropylenes; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers