title: Porous membranes for ballast water treatment from microalgae-rich seawater.
abstract: The ballast waters from ships pose a major threat to oceans, notably because of the spread of microorganisms. The present study evaluates the techno-economic feasibility of implementing the membrane process to remove microalgae from seawater to be ballasted in a single step during planktonic bloom. The optimal conditions for the microfiltration of complex and reproducible synthetic seawater are a permeate flux and specific filtered volume of 100 L.h(-1).m(-2) and 75 L.m(-2).cycle(-1), respectively. Recovery of the membrane process represents about 76.6% and 62.7% of the annual cost for a cruise ship (5400 passengers) and liquefied natural gas (LNG) carrier (75,000 m3 of liquid natural gas), followed by the membrane replacement cost (13.4% and 21.9%, respectively). The treatment costs are competitive with conventional treatments, even when the membrane process is more feasible for cruise ships due to its smaller capital cost and footprint.
authors.affiliation: LUNAM, Université de Nantes, GEPEA, UMR-CNRS 6144, 37 Bd Université, BP 406, 44602 Saint-Nazaire Cédex, France.
authors.forename: Julie
authors.initials: J
authors.lastname: Guilbaud
authors.affiliation: LUNAM, Université de Nantes, GEPEA, UMR-CNRS 6144, 37 Bd Université, BP 406, 44602 Saint-Nazaire Cédex, France. Electronic address: anthony.masse@univ-nantes.fr.
authors.forename: Anthony
authors.initials: A
authors.lastname: Massé
authors.affiliation: LUNAM, Université de Nantes, LEMNA, EA 4272, Chemin de la Censive du Tertre - BP 52231, 44322 Nantes Cedex 3, France.
authors.forename: Francois-Charles
authors.initials: FC
authors.lastname: Wolff
authors.affiliation: LUNAM, Université de Nantes, GEPEA, UMR-CNRS 6144, 37 Bd Université, BP 406, 44602 Saint-Nazaire Cédex, France.
authors.forename: Pascal
authors.initials: P
authors.lastname: Jaouen
mesh_terms: D008567:Membranes, Artificial; D058086:Microalgae; D016062:Porosity; D012623:Seawater; D012767:Ships / Q000191:economics; D018508:Water Purification / Q000191:economics / Q000295:instrumentation* / Q000379:methods*
chemical_list: D008567:Membranes, Artificial
keywords: Alga; Ballast water; Membrane; Microfiltration; Ship; Techno-economic