title: A Simple, Cost-Efficient Method to Separate Microalgal Lipids from Wet Biomass Using Surface Energy-Modified Membranes.
abstract: For the efficient separation of lipid extracted from microalgae cells, a novel membrane was devised by introducing a functional polymer coating onto a membrane surface by means of an initiated chemical vapor deposition (iCVD) process. To this end, a steel-use-stainless (SUS) membrane was modified in a way that its surface energy was systemically modified. The surface modification by conformal coating of functional polymer film allowed for selective separation of oil-water mixture, by harnessing the tuned interfacial energy between each liquid phase and the membrane surface. The surface-modified membrane, when used with chloroform-based solvent, exhibited superb permeate flux, breakthrough pressure, and also separation yield: it allowed separation of 95.5 ± 1.2% of converted lipid (FAME) in the chloroform phase from the water/MeOH phase with microalgal debris. This result clearly supported that the membrane-based lipid separation is indeed facilitated by way of membrane being functionalized, enabling us to simplify the whole downstream process of microalgae-derived biodiesel production.
authors.forename: Moo Jin
authors.initials: MJ
authors.lastname: Kwak
authors.forename: Youngmin
authors.initials: Y
authors.lastname: Yoo
authors.forename: Han Sol
authors.initials: HS
authors.lastname: Lee
authors.forename: Jiyeon
authors.initials: J
authors.lastname: Kim
authors.forename: Ji-Won
authors.initials: JW
authors.lastname: Yang
authors.forename: Jong-In
authors.initials: JI
authors.lastname: Han
authors.forename: Sung Gap
authors.initials: SG
authors.lastname: Im
authors.affiliation: Department of Food Science & Technology and Institute of Agriculture & Life Science, Gyeongsang National University , Jinju, Republic of Korea 660-701.
authors.forename: Jong-Hee
authors.initials: JH
authors.lastname: Kwon
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods*; D002725:Chloroform / Q000737:chemistry; D003362:Cost-Benefit Analysis; D004952:Esters / Q000737:chemistry; D021621:Imaging, Three-Dimensional; D008055:Lipids / Q000302:isolation & purification*; D008567:Membranes, Artificial; D008689:Methacrylates / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D058086:Microalgae / Q000737:chemistry*; D000069463:Olive Oil / Q000302:isolation & purification; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013193:Stainless Steel / Q000737:chemistry; D013499:Surface Properties; D013816:Thermodynamics; D014867:Water / Q000737:chemistry; D017155:Wettability
chemical_list: D004952:Esters; D008055:Lipids; D008567:Membranes, Artificial; D008689:Methacrylates; D000069463:Olive Oil; D012997:Solvents; D014867:Water; D013193:Stainless Steel; D002725:Chloroform; D000432:Methanol
keywords: initiated chemical vapor deposition (iCVD); interfacial energy; membrane based lipid separation; surface modification; surface-energy modified membrane