Please use this identifier to cite or link to this item: http://ciatec.repositorioinstitucional.mx/jspui/handle/1019/203
Cross-flow filtration for the recovery of lipids from microalgae aqueous extracts: membrane selection and performances
LILIANA VILLAFAÑA LOPEZ
Acceso Abierto
Atribución-NoComercial
Membranas (Tecnología)
Microalgas
The biore_nery of microalgae necessitates innovative choices of soft and energy-e_cient processes to guarantee the integrity of fragile molecules and develop eco-friendly production. A wet processing of biomass is proposed, which avoids expensive drying steps. It includes harvesting, cell dis- 5 ruption, and fractionation of the target compounds. Membrane _ltration is a promising clean fractionation step. In this paper, the recovery of lipids from starving Parachlorella kessleri aqueous extracts by cross-ow _ltration was studied. A model solution was formulated to test four membranes of di_erent materials (PVDF, PES, PAN) and cut-o_s (200 kDa - 1.5 μm). The 10 hydrophilic PAN 500 kDa membrane presented the best performance (ux stability, permeate ux, lipid retention, and cleanability) and was therfore selected for _ltrating real aqueous extracts. Similar permeation uxes were obtained with model and real products: 34 - 41 L h􀀀1 m􀀀2 respectively. The coalescence of lipid droplets was observed with model solutions but not 15 with real products, less concentrated. The lipids from the real products were wholly retained by the PAN membrane, whereas some of the polysaccharides and proteins were able to permeate. An optimization of the coupling between culture, cell disruption, clari_cation, and _ltration would allow a good concentration and puri_cation of the lipids from microalgae.
2019
Artículo
Inglés
Empresas
Estudiantes
Investigadores
Maestros
FENÓMENOS DE MEMBRANA
Versión publicada
publishedVersion - Versión publicada
Appears in Collections:Artículos de investigación

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